Human development Essay Example | Topics and Well Written Essays - 750 words - 2

Human development - Essay Example Skinner’s theory of learning is based on the premise that learning is a function of change in overt behavior. Changes occur due to the response to the external stimuli. This reinforcement theory relies on the assumption that behavior is a function of its consequences (Dunn, 2002). The learner will repeat the behavior if positive reinforcement follows the behavior. Positive reinforcement refers to some verbal recognition or appreciation or rewards like certificates or promotion to a higher level. Negative reinforcement can also strengthen the behavior but punishment can weaken the behavior. This is because the negative condition has been experienced as a consequence of the behavior and teaches the individual not to repeat the behavior. Punishment can help to eliminate behavior and is used in daily life but it works only for a short period. Bandura’s theory states that to learn anything you have to pay attention to it. Anything that dampens the attention will consequently reduce the learning process (Boeree, 1998). For instance, sleep and lethargy can dampen attention and consequrntly learning. Bandura experimented with models and summarized that if the model is attractive colorful appears like us we would pay more attention. After paying attention, it is important to retain what has been paid attention to. This means retaining the mental image or verbal description of the model. When it is stored the same image can be brought up at will whenever necessary. The third step involves translation or reproducing the images into actual behavior. This implies an individual must have the ability to reproduce. This way the ability to imitate improves with practice. In fact the abilities improve even when one just imagines imitating. The act of imitating comes only through some form of motivation. This reinforcement can b e some past reinforcement, promised reinforcement or vicarious reinforcement. The main difference between Bandura and Skinner lies in their

Pyrometer Is An Instrument For Measuring Temperature Engineering Essay

Pyrometer Is An Instrument For Measuring Temperature Engineering Essay Pyrometer is an instrument for measuring temperature. The pyrometer is can be apply to instruments that measure high temperature only, but some pyrometer is considered to measure low temperature. Thus, the temperature measurement under severe conditions is the most accurate method, and it is established on non-intrusive (indirect) temperature techniques. The functions of the temperature of the body are the amount of thermal energy, heat leaving a body by radiation and the wavelength of that radiation. The basic of temperature measurement in these instruments is requirement on temperature of the characteristics of radiation. In a pyrometer, the heat radiated from a hot body is used to measure temperature, and it is through a fixed lens that efforts the heat energy on the thermopile, this is a noncontact device. Thus, furnace temperatures are measured through a small hole in the furnace wall. The distance from the source to the pyrometer can be fixed and the radiation should fill the field of view of the sensor. Radiation Thermometer In the top diagram, Radiation thermometers, or pyrometers, make use of the fact that all objects release thermal radiation, when observing at the bars of a light bulb. The Planck law of radiation can be measured the amount of radiation emitted and connected to temperature. When the objects that is very hot in hazardous environments, the sensor will detect the object and measured the temperature. 2.2. FOUR PRINCIPAL There are four principal techniques for the measurement of temperature by the radiation from a hot body. 1. Total radiation 2. Pyro-electric 3. Photo-electric 4. Optical Pyrometers 2.2.1. TOTAL RADIATION PYROMETERS The total radiation pyrometer obtains the radiation from a certain hot body. The total radiation contains the visible and invisible radiations. It consists of radiation getting element and a measuring device. The diaphragm unit with a mirror is used to effort the radiation on a thermocouple. The distance between the mirror and the thermocouple is adjusted for proper focus. The image of the front diaphragm is attentive on the thermocouple by the mirror. Therefore, the temperature measurements are independent of the distance of the target. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5nrd7I50lBvqsB70bJ4Bh9pjrkgC1NUpln_3G08rx6Le1aOjpNWuVKoLAC7CBzK-CJ533W_R-SrxkElY5hJvTqh3kO8UE8IAPCRWyBW6RSY5lga35SCQp49mgdG_qs_srDN2HyYw7i88/s1600/total+radiaton+pyrometer.JPG If there is any smoke, dust in the space between the target and transducer, it reduces the radiation, so negative errors. Then, the meter reading will be high because the hot gases and flames are released. This pyrometer is a non-linear, poor sensitivity and this device is not used for the temperature lower than 600-1200 degree Celsius. The advantage of the radiation pyrometer is used to measure very high temperature, high output signal, moderate cost, no need to have contact with measuring system and fast response. The disadvantage of the radiation pyrometer is a non-linear scale, error will occur and emissivity of target material affects the measurements. Then, it is used to measure temperature of moving target where physical contact is impossible, used to measure temperature in corrosive environment and used to measure invisible rays from radiations. Finally, it is used quartz or glass lens are most used pyrometers in the industry, then it is can used for bodies that are not perfect black bodies or non-black bodies. These pyrometers are often used in electric chamber furnaces, glass tank furnaces and other industrial areas. 2.2.2. Pyro-electric Pyro-electric detectors for thermal radiations are moderately new form of pyro-meters. The structure material is commonly ceramics are materials whose particles have a stable electric dipole because of the point of the electrons in molecules. Usually these molecules invention in a chance mish-mash method all through the substance of the material therefore there is no remaining electrification. Also, the location of these molecules is more or less fixed at ambient temperatures. If the temperature is high exceeding specific level characteristic to the certain material, the particles start to alternate freely. This is called the Curie temperature. Uncertainty, the temperature of the ceramic material is increased, and then the molecular dipole will alternate at a higher angle. Thus higher temperature of the radiant object, the angle of oscillation of the molecular dipole will be bigger. Furthermore, the temperature is increased, and then the voltage is increased. Then, the temperature can be measure by this voltage. This is similar to the total radiation thermometer. Finally, the pyro-electric is used to control the true temperature of an object devising a new emissivity. But the pyro-electric thermometers still have relatively limited applications. The structure of a pyro-electric thermometer and the location of the shutter is shown in the below diagram. 2.2.3. Photo-electric The photo-electric pyrometers are used measure the radiations of the object are shorter wavelength at very high temperatures. A photodiode is usually a semiconductor diode; it could be made of germanium. When the diode is applied to a voltage in reverse, it would influence the electrons do not have enough energy to cross the energy block of the junction. However, when the incident radiations are directed towards them, some electrons gain enough energy to cross the junction; it will obtain this energy by crash with photons. The energy of photons is inversely proportional to the wavelength. Besides, the radiant energy crushed upon the surface of the photoelectric diode increase, more electrons cross the block and hence more voltage reading will be gained. This will observably occur at higher temperature, and then the temperature is measured indirectly by measuring the voltage reading. Finally, the photoelectric are used in the industry mainly as a mention instrument to determine the true temperature of an object having unknown emissivity. Photoelectric instruments are very precise and are thus changing the above mentioned optical type pyrometers. In additional, it is can be use a photoelectric sensor to warn of smouldering fires which is smoke detector. 2.2.4. Optical Pyrometers The optical radiation thermometers or pyrometers are a simple in structure and it is accurate for temperature measurement between 600 oC ~3000 oC, because the decision making of the operator, so it is not a suitable device for control determinations. In opposite, it is very effective for calibration of total radiation thermometers and point measurements. The temperature as well as the resistance of the filament is recognized. Therefore, the temperature of the radiant object is the similar as they are the same; this is one of the main disadvantages of this apparatus, the element that the measured temperature is reliant on the operators decision when the filament has disappeared from the image. The optical pyrometer is shown in the below diagram. Optical Pyrometers are normally used in the process industry for special measurement. It has a high precision and used as a mention instrument. The accuracy and precision of extra pyrometers are measured by comparing with it. They are also used for temperature measurement of non-black bodies. Their temperature range is high; they are the most commonly used high temperature measuring devices used in the laboratory. One of the drawbacks is the fact that they can only be used by experienced personnel. But they are being gradually replaced by the modern photoelectric pyrometers. Question 3 3.1. What (electrically) is being measured? The Electrocardiogram (ECG) is normally used to test for heart conditions and that is a simple test that takings about 10 minutes. The electrocardiogram machine records the hearts rhythm against paper through sticky electrodes which are located on the peoples chest, arms and legs. If the heart muscle is injured or short of oxygen, the recording will display it out. The electrocardiogram (ECG) is normally used to different test for the heart conditions, such as exercise ECG (also called a treadmill test or exercise stress test), Holter monitoring (also called ambulatory ECG), echocardiogram, blood test, echocardiogram stress test, transoesphageal echocardiogram (TOE), cardiac catheterisation (Angiography), electrophysiological studies (EPS), tilt table test and CT angiography, 3.2. How is the electrical signal capture? What is the sensor? How does it work? 3.2. 1.How is the electrical signal capture? An electrocardiogram (ECG) is the simplest and fast techniques used to estimate the heart. Electrodes are placed on the chest, legs and arms. The electrical activity of the heart is measured, prints out and understood for the doctors information and further understanding when the electrodes are joined to an ECG machine. During this practice, many ECG tracings are found over a period of around 20 minute estimating numerous hundred cardiac cycles to sense indirect abnormalities that growth risk for cardiac arrhythmias. These indirect abnormalities are commonly not sensed preceding a plain ECG. A computer captures the electrical signal from the heart and the doctor will get more detail for the hearts electrical conduction system is functioning. Then, the hearts pumping act is controlled by an electrical conduction system that manages the reduction of the several chambers of the heart. An electrical stimulus is produced by the sinus node and it is a specialized tissue situated in the right atrium of the heart. The sinus node produces an electrical stimulus frequently at 60~ 100 times per minute in normal condition. This electrical stimulus move down by the conduction way and the hearts lower chambers to contract and bleeding out blood. The left and right atria are moved first and contract a short period of time before the left and right ventricles. Lastly, an electrocardiogram is used to measure the electrical activity of the heart. A graphic representation and tracing of the electrical activity can be getting from the placing electrodes at specific positions. The normal tracing or several hearth related conditions can be show from the ECG. 3.2.2. What is the sensor? ECG sensor is use to detect the electrical signal produced by the hearth and detected at the bodys surface. It is use the three electrode patch good contact with skin. The electrodes must be kept in refrigerator with air-tight container, but it is cannot be preserve more than 1 year. Firstly, peel first electrode from the backing paper and place it on the inside of the right elbow. Secondly, place a second and third electrode on the right wrist left wrist. Thirdly, connect the clips from sensor to the tabs on the edges of the electrode patches. Lastly, connect white clip to right elbow electrode patch, red clip to right wrist electrode patch and blue clip to left wrist electrode patch. Then, the ECG is use to monitor the resting ECG, show the wave forms, monitor ECG after mild exercise, investigating ECG with different body position and investigating ECG changes after mild stimulants. Using the ECG sensor, it is can be record an ECG of a person who is initially at rest. Disconnect the sensor wires from the electrode patches, but leave the patches on the person being monitored. Have the person exercise for a few minutes like jogging. Reattach the sensor wires to the electrodes on the person when they have finised exercising and record a new EKG. Compare the resting EKG to the EKG after mild exercise. 3.2.3. How does it work? In the top diagram, the basic functions of an ECG machine include ECG waveform display, either through LCD screen or printed paper media, and heart rhythm indication as well as simple user interface through buttons. More features, such as patient record storage through convenient media, wireless/wired transfer and 2D/3D display on large LCD screen with touch screen capabilities, are required in more and more ECG products. Multiple levels of diagnostic capabilities are also assisting doctors and people without specific ECG trainings to understand ECG patterns and their indication of a certain heart condition. After the ECG signal is captured and digitized, it will be sent for display and analysis, which involves further signal processing. Question 5 A voltage to frequency and frequency to voltage converters is very useful in the industries area. A voltage to frequency converter is usually use in measurement and signal conditioning systems. Its uses can be finding in sensor based data acquisition systems and data conversion circuit. Then, the converters receive an adaptable analog input signal to generate the pulse train output, whose frequency is linearly proportional to the input voltage. The voltage to frequency counter is free of missing codes and monotonic. It can consume very small of power and mixes some noise. For example, The frequencies to voltage converters are used in any input frequency waveform and provide a linearly proportional voltage outputs. It is can be apply in power control, instrumentation, measurement system and communication. The frequencies to voltage frequency are usually established on low pass filter or stable duration at a rate set by the input frequency. Also, it can count the amount of narrow pulses over a fixed period time. Moreover, the signal should be higher frequency than input signal. For example, TC9400 V/F Circuit The TC9400 V/F converter is used to operate on the principal of charge balancing. The operation of the TC9400 is easy to understand by refer to the below diagram. The input voltage is converted to a current by input resistor. The current is converted to a charge arranged the integrating capacitor and come as a linearly decrease the voltage at the output. The output swing is set by the threshold detector, which is the voltage is applied to the capacitor for a time to charge the capacitor to the voltage. This action can be reduces the charge on the integrating capacitor. And, a stable amount (q = CREF x VREF), cause the Op Amp output to establish a limited amount. AT the end of the charge, the CREF will be shorted out. Besides, the output again crosses zero and the system is ready to recycle. In this way, the constant discharging of the integrating capacitor through the input is stable from the reference voltage. The input voltage is increased, the number of reference pulses increases. It is causes the output frequency to increase. Subsequently each charge increase is fixed; the frequency is increase by voltage is linear. Furthermore, the precision of the output pulse width will not direct disturb the linearity of the voltage to frequency. The TC9400 operates small power CMOS handling for small input bias and balance currents, with very small power dissipation. The open drain N-channel output FETs offer great voltage and great current sink ability. The TC9400 F/V circuit The TC9400 is used to generate an output linearly proportional to the input frequency waveform. A precise amount of charge (q = CREF à ¢Ã‹â€ Ã… ¾ VREF) to be distributed into the op Amps summing junction is caused by each zero intersection at the threshold detectors input. This is flow by the feedback resistor and generates voltage pulses at the output of the Op Amp. A capacitor (CINT) through RINT averages the pulses into a DC voltage; hence it is linearly proportional to the input frequency. The output voltage is connecting to the input frequency through the transfer equation: VOUT = FIN The response time to an alteration in FIN is equal to (RINTCINT). The total of the ripple on voltages output is inversely proportional to CINT and the input frequency. CINT can be increase to lower the ripple. The low frequencies are the value of 1 µF to 100 µF. The VREF is definite as the voltage difference between pin 7 and pin 2 when the TC9400 is used in the single supply mode. In top diagram, the input voltage levels for the TC9400 are  ±400mV in  ±5V applications. If the frequency source is used to measured is unipolar which are TTL or CMOS functioning from a +5v source, formerly an AC coupled level shifter must be used. In single supply F/V applications, the resistor divider will make sure the input threshold will track the supply voltages. The diode clamp avoids the input from working distant enough in the negative direction to chance on the start-up comparator. The diode is onward voltage reductions by 2.1mV/ °C, hence for high ambient temperature operation; two diodes in series are suggested. Question 6 The purpose of the differential pressure flow meter The differential pressure flow meter is used to measure the flow of fluid in a pipe which is used the Bernoullis equation to measure it. Thus, the differential pressure flow meter has flow a constriction into the pipe which is constructs a pressure fall through the flow meter. When the flow is increasing, and the pressure drop is more to form. The flow meter to the transmitter which are measure the differential pressure to control the fluid flow by impulse piping route the upstream and downstream pressure. In Bernoullis equation defines the protection of hydraulic energy through a compression in a pipe. It is also defines the sum of the static energy (pressure head), kinetic energy (velocity head), and potential energy (elevation head) upstream and downstream of the compression are equivalent. In Bernoullis equation, the pressure drop through the compression which is proportional to the square of the flow rate. The meaning of the Bernoullis equation, when the full scales flow produces 10 percentages, and the full scale differential pressure is produces 1 percentage. Differential pressure transmitter accuracy is classically despoiled at low differential pressure in its range, thus flow meter accuracy can be similarly despoiled. Consequently, this non-linear relationship can have a damaging effect on the precision and rejection of differential pressure flow meter. The basic operation principle of the differential pressure flow meter The differential pressure flow meter is used to measure the flow of gases, liquids and air in pipes. Besides, the differential pressure flow meter are usually apply into the industries such as wastewater industries, mining, pulp and paper, petroleum, chemical, petrochemical, water , mineral processing, air industrial gases, steam and cryogenic liquids. When using differential pressure flow meter must be careful especial for fluids with high viscosity which are some hydrocarbons and foods, since their precision can be despoiled when Reynolds amount is low. This flow meter can be functional to moderately clean fluids. In the chemical industry, the flow of corrosive fluids can be measured because with proper consideration to material of construction. Then, when using differential pressure flow meters must be careful in dirty service because it can be cause incorrect measurements. The basic operating principle of differential flow meter is referring on the principle that the pressure decrease through the meter is proportional to the square of the flow rate. The flow rate is attained through removing the square root and measuring the pressure differential. Then, the differential pressure flow meter have a primary and secondary element. In the primary element, it is builds the differential pressure in the pipe that will causes an adjustment in kinetic energy. The pipe size, liquids properties and flow conditions must be matched to the unit. The differential pressure and offers the signal or display that is changed to the actual flow value had been measured by secondary element. In addition, the differential pressure flow meters have included the orifice plate, venturi, nozzle and pitot tube. Orifica plate The orifice plate is usually used in gas, clean liquid, and steam service. It is obtainable for all pipe sizes, and if the pressure decrease it involves is free, it is very economical for calculating flows in bigger pipes. The orifice plate is also permitted by numerous standards administrations for the protection transferal of liquids and gases. Then, it is measured over the difference in stress from the upstream side to the downstream side of a moderately blocked pipe. The plate checking the flow is measured block that constricts the pipe and services the flowing fluid to constrict. The orifice is a flat piece of metal with a precise sized hole tired in it. Greatest orifices are of the conical (quadrant), segmental and concentric type, but eccentric designs are also accessible. Formerly, the orifice plates are cheap, simple construct and can be supplied for some application in some material. The concentric orifice plate takes a sharp concentric drag that offers the pure line connection among the fluid and the plate, with slight friction strain at the border. The diameter of concentric orifice plates is from 0.25 to 0.75 ranges. The highest velocity and lowest static pressure happens at certain 0.35 to 0.85 pipe diameter downstream from the orifice plate. It is called the vena contract. Determining the differential pressure by a location near to the orifice plate reduces the influence of pipe coarseness, subsequently the pipe wall and the fluid has effect by the friction. Venturi The venturi tube flow meter is used in application of lower pressure drop or higher turn down rates. In the Venturi tube, the fluid flow rate is used to measure the cross sectional flow area in the flow path, creating a pressure difference. After the restricted area, the fluid is passes over a pressure retrieval withdrawal section; it is up to 80% of the differential pressure caused at the restricted area. Through flow calibrating and proper instrumentation, the Venturi Tube flow rate can be decrease around 10% of full scale range with proper precision. This offers a turn down rate 10:1. Then, it is can pass 25%~ 50% flows than an orifice with the similar pressure drop. The primary cost of venturi tubes is high, so it is used on higher flows or difficult flow applications. Venturis are oblivious to velocity outline effects and then need less straight pipe path than an orifice. It will be combined with the self- cleaning action of the flow over the tube, makes the device resistant to corrosion, internal scale build up and erosion. In regardless of its high primary cost, the overall cost of ownership can still be approving because of savings in operating, maintenance and costs installation. Nozzle The flow nozzle is stable than the orifice plate, mostly in high velocity and high temperature services. It has used to measure high flow rates of heated vapour. The flow nozzle has a larger flow capacity than the orifice plate and involves a lower initial venture than a venturi tube, but it is also offers low pressure recovery. A main weakness of the nozzle is hard to change than the orifice except it can be impassive as part of a spool unit. The flow nozzles are used in measurement for gas and air flow in industrial applications. This is a simple design, cheap, and it is available for many applications in various materials Flow Nozzles is can handle around 60% liquid flows than orifice plates consuming the similar pressure drop at high velocities. Suspended solids with liquids can be metered. Though, it is not suitable for high viscous liquid or enclosing bigger amount of sticky solids. Pitot tube The pitot tube are used to measure fluid flow, principally in air applications as HVAC systems and ventilation , it is used in airplanes for the speed measurement. The pitot tube measures the kinetic energy of the flow into potential energy is convert by the fluid flow velocity. The pitot tube is used to constrained to point measuring. Through the annubar or multi-orifice pitot probe, the dynamic pressure can be measured through the velocity profile and the annubar finds an averaging influence. Pitot tubes  sense two pressures instantaneously, static and impact. The impact unit involves of a tube through one end focused at right angles to the flow direction. The static tubes end is locked, but a small slot is placed in the side of the unit. The tubes can be attached individually in a pipe or joint in a particular casing. Pitot tubes are usually installed by welding a join on a pipe and injecting the probe through the join. Use of most pitot tubes is restricted to particular point measurements. The units are disposed to plug by overseas material in the liquid. Advantages of pitot tubes are lack of moving parts, low cost, minimum pressure drop and easy installation.

The Princess Bride Essay -- essays research papers

In the film, 'The Princess Bride,'; directed by Rob Reiner, Cary Elwes plays a farmboy known as Westley during the Middle Ages. Westley falls in love with Buttercup, played by Robin Wright, who lives upon the land where he works. Buttercup also falls in love with Westley, so he sets out to find his fortune so they can be married. A short time later, Buttercup learns that Westley has been killed by pirates. The Prince of the land chooses Buttercup to be his bride, regardless to her feelings. Before the marriage takes place, Buttercup is kidnapped. Westley, disguised as a pirate in black, sees the kidnapping occur and chases after Buttercup. He catches up and defeats all three of the kidnappers using his strength, skill, and smarts. Buttercup learns of his true identity and together they escape from the evil prince. Westley is an intelligent man who makes good choices. He is a hero in many aspects. Buttercup, on the other hand, made some poor choices.   Ã‚  Ã‚  Ã‚  Ã‚  Westley was intelligent. He displayed this characteristic when he poisoned the cups of wine. He poisoned both cups to guarantee that Vizzini, played by Wallace Shawn, one of the kidnappers of Buttercup, died. The intelligence was in the preparation. Westley had built up immunity to the poison before so that the small amount didn't affect him when he drank it, but affected Vizzini.   Ã‚  Ã‚  Ã‚  Ã‚  Westley also showed intelligence when he couldn't move, but made Prince Humperdink beli...

Comparison of American Education and Asian Eduction

Joshua R Coleman Mrs. Kumler English 10 4-26-12 Comparison of American Education and Asian Education For many years, the United States has prided itself in producing the most intelligent people in the world. Much of the U. S. ’s advances have been through the contributions of many brilliant scientists, doctors and other professionals. However, recent studies have shown that America is losing this advantage to many Asian countries including Japan and South Korea. American education has fallen short of the education found in the countries of Asia due to the lack of the competitive culture in America.To show the competitiveness of a nation one can look at a country’s population, average wages, and the amount of time spent in school. When compared to countries such as Japan and South Korea, the U. S. has a much higher population. However, it is not the total population that would make a nation competitive, but the amount of people living in a certain area. According to the National Census of 2011, there are over 300 million people in the United States living in the 3,537,422 sq. iles of the country (â€Å"Profile†). According to the U. S. Department of State, country of South Korea has a population of 48,754,657 people in its 38,023 sq. mi. To put the population of South Korea in comparison to the U. S. , imagine about one sixth of America’s population in side of the state of Indiana. The population of Japan consists of about 126,457,664 people living inside of its 145,902 sq. mi. The population density of Japan is about half of the United States’ population inside of the state of California.The population density shows how many people are competing with each other for jobs and college acceptance. Since America has such a large amount of territory, the people are not as threatened with each other, thus lowering its competition levels. Americans were once thought of having the richest population in the world. In 2010 National Wage Index, the average wage was $41,673. 83. This beats the average wage in South Korea, which is the equivalent of $33,000 U. S. dollars, yet loses to the citizens of Japan, who make the equivalent of $46,800 U.S. dollars (â€Å"2012 Average Salary Survey†). The wages help us determine whether the average man has a well paying job, for him to get a well paying job, he would probably need a good education. The amount of time spent in the classroom also may improve the superiority of the students it produces. The average American student goes to school for 6. 5 hours a day, 180 days a year (O’Mara). In South Korea, the required amount of time for children to attend school is 220 days (Pellissier). In Japan a total of 240 days is required.Students must also pass an entry exam to get into high school, thereby increasing the level of competition even higher (â€Å"Daily Life†). The longer school year and the entry exams force a student to become more focused and competi tive. South Korea, Japan, and the U. S. A. are part of the PISA (Programme for International Student Assessment), which â€Å"evaluate[s] education systems worldwide by testing the skills and knowledge of 15-year-old students in participating countries/economies (PISA). † After the 2009 test scores were published, the U.S. fell below the average in the math section but remained only slightly above average in the reading portion of the test. Japan placed fourth in the mathematics section, and fifth in the reading section. South Korea, however, was the country that had the highest scoring in both mathematics and reading, ranking at the top of the list. These tests are proof that America is not producing the level of high scoring students as Asian Countries. This is yet another example of how a competitive culture can effect and improve an education system.From what the information suggests, the educational systems in Asian countries far exceed that of America. The level of comp etition in these countries plays a major factor in their success and will continue to allow only the best and brightest students to be selected in universities and jobs. If America is to retain her status as the world’s leading producer of brilliant minds, then it must somehow improve its educational systems in order to match not just the competition within her own borders, but across the globe.

Attitude Towards Women Fathers and Sons Essay

To analyze the attitudes towards the women question and the most useful starting point would be to look at the representation of the liberated woman, Yevdoxia Kukshina, which can be contrasted with the representation of Bazarov’s mother or Nikolai Kirsanov’s wife, the women ideals of the older generation. Kukshina is clearly meant to the representative of the radicalism of the 1850s to1860s, â€Å"the progressive, advanced or educated woman : nigilistka or nihilist woman† (Richard Stites). She has ‘vowed to defend the rights of women to the last drop of my blood’ and is scornful of Sand ‘an out of date woman’. She has separated from her husband and plans to go abroad to study in Paris and Heildelberg. She thus, personifies the emergence of new objectives and tactics among the Russian emancipees of the early 1860s. However, it is also quite obvious that while much has been written about Turgenev’s attitude towards his nihilist hero, there is no doubt that the female nihilist Kukshina is an unflattering caricature and as Walter Smyrniw quotes â€Å"Turgenev has deliberately portrayed Kukshina as a ludicrous and repulsive emancipee.† Walter goes on to argue that in his portrayal of Kukshina, Turgenev lampooned only certain undesirable tendencies generated by Russian emancipees. The worst among them was a lack of genuine involvement, an inadequate commitment to the movement itself. Some merely assumed the roles of the emancipated women and hence their behaviour was both contrived and unnatural. Although many critics have argued along the same lines of Turgenev’s portrayal of Kukshina as a device for irony â€Å"the progressive louse which Turgenev combed out of Russian reality† (Dostoevsky) and that he has assumed the same sentiment in respect to Russian men who merely assumed the pose of materialists and nihilists (eg. Sitnikov), it is hard to escape that in the description of her person and household we find some of the stereotyping of radical women found in most conservative writing. He did not hesitate in expressing value judgments when ridiculing the pretentiousness and hypocrisy of Russian women who merely played the role of emancipees. She is dirty and slovenly in her habits and person, her room is scattered and dusty, her hair disheveled and her dress crumpled. Moreover, her conversation and behaviour is meant to ‘show’ us that her radicalism is shallow and unaffected. The narrator ‘tells’ us that she greets her guests with a string of questions without waiting for answers. It is important to notice here the narrator’s generalization here, which would seem to impute lack of serious concern (feminine casualness) to all women as part of their feminine nature and not to Kukshina as an individual. The narrator draws repeated attention to Kukshina’s unattractive physical appearance almost as if that were partly her fault. Kukshina is unfortunate enough to show her gums above her top teeth when she laughs and her piano playing revels her flat-cut fingernails. However, what is most significant in terms of the dominant patriarchal ideology of the mid-nineteenth century Russia is her declaration, â€Å"I’m free, I have no children.† From a conservative perspective, this would count as near sacrilegious statement. Though Bazarov himself is a serious character, it’s possible to read Sitnikov as a parody of the younger generation. At Madame Kukshin’s, the narrator tells us â€Å"To Sitnikov the chance to be scathing and express contempt was the most agreeable of sensations† (13.44).

Pippa Norris and Ronald Ingeharts Cosmopolitan Comunication

Pippa Norris and Ronald Ingeharts Cosmopolitan Comunication How morality function affects cosmopolitan communications The firewall model as postulated by Norris and Inglehart holds that news media impacts on societal values and as such, they can actually initiate value change. Norris and Ingehart have noted that although such a scenario may not occur frequently, nonetheless, there is the risk that it can be mediated by societal factors, in which case individual countries can be affected by the flow of cosmopolitan communication.Advertising We will write a custom assessment sample on Pippa Norris and Ronald Ingehart’s â€Å"Cosmopolitan Comunication† specifically for you for only $16.05 $11/page Learn More For example, in Chapter 3 of their book, Norris and Ingehart show how the flow of information moves from the global north (especially Germany, the US, the UK, Canada, and France) to the other global countries (Norris and Inglehart 8). Many of these other global countries lack the necessary media freedo m and do not easily access foreign news. In addition, they cannot also easily access foreign communication infrastructures. According to Norris and Inglehart, such a setting acts as a firewall that shields media influences from the society. What the authors intend to demonstrate is that cultural products, communication and information do not just flow freely, and that their flow could be hindered by ‘firewalls’ or social barriers (specifically isolation, poverty, traditional local socialization processes, and press restrictions). Many behavioural practices and social values are learned from the ideas and images conveyed by glossy magazines, television entertainment, music videos, internet websites, feature films, consumer advertising, and news reports. As such, the media is regarded as one of the most important tools for socialization. Therefore, the media can influence the attitudes and moral standards of the society. Although Norris and Ingehart do not object to the c laim that the media does exist, nonetheless, its activities are limited by firewalls (15). Due to the existence of various firewalls, the mass media is not in a position to penetrate parochial societies and as a result, it is cannot influence them. What should be done by politicians about cosmopolitan, what cultural policies should be developed, according to Norris and Inglehart? Owing to the rapid expansion of global communication, indigenous cultures are at a greater risk of being exposed to a sudden flow of advertising, corporate capitalism, communication, and explicit sexuality and graphical violence on television.Advertising Looking for assessment on communication strategies? Let's see if we can help you! Get your first paper with 15% OFF Learn More This implies that globalization is a threat to cultural diversity and unless something is done very fast, we are likely to witness the loss of cultural diversity in certain sections of the society. Towards th is end, our politicians have an important role to play given that they are the ones charged with the responsibility of implementing policies. Norris and Inglehart contend that national diversity is faced with the threat of the globalized news media. As such, our politician should be in a position to propose policies for adoption by member countries in order to ensure that they retain their cultural diversity. In addition, there is need to also develop certain cultural policies that can restrict access to phonographic sites for purposes of retaining cultural identity. We need to encourage the idea of cultural fusion so as to enhance a balanced power dynamic (Norris and Inglehart 19). This way, it becomes easier and faster for members of a society to communicate with each other and in the process, they can help one another in the generation of a global mix that blends programs, connections, and genres derived from various places and times. Norris, Pippa and Ingehart, Ronald. Cosmopol itan Communications: Cultural Diversity in  a Globalized World. New York: Cambridge University Press, 2009. Print.

buy custom The Renaissance Humanism essay

buy custom The Renaissance Humanism essay This research paper studies the basics of humanities; how and when did humanism began? It further studies Renaissance Humanism during fourteenth, fifteenth and sixteenth centuries and the literary work during that time. It further studies the cultural and philosophical movement which swept across Europe during that time which led to the modern era, ending the era of middle ages is known as Renaissance Humanism. For my study, I referred to Krayes book Renaissance Humanism which was first published in 1996 and discusses the origin of Renaissance Humanism in Europe, especially the Italian humanists contribution in translating the ancient Roman and Greek work related to art and literature of ancient times. Kreis article on Renaissance Humanism also helped me clarifying key points of humanism, their philosophy and school of thought and how did they worked their way up so that their views are known and widely accepted by the society. During 1400 A.D. to 1650 A.D. the secularism philosophy stimulated with the era when people and nations began favoring the pagan traditions again and were diverted to gain respect and worldly pleasures. This periods intellectual and literary currents and their social philosophy which is considered to be the most predominant, is referred to as Humanism (Kreis, 2000). The cultural and philosophical movement swept across Europe during fourteenth, fifteenth and sixteenth century which lead to the modern era, ending the era of middle ages is known as Renaissance Humanism (Kraye, 1996). Due to the emergent secular view of life it resulted in zeal for the tradition; growth of luxury and prosperity, trade expansion, and growing social contacts attracted more interest in the pleasures of the world although they had formal adherence to Christianity. Therefore, humanists gave birth to classical writers who revealed the attitude of secular system and similar kind of social values (Kreis, 2000). Amongst the common outline of those scholarly interests and their mental attitudes gathered under the rubric humanism, historians agreed that the humanists mentality stand between the contemporary scientific and their critical attitude, and medieval supernaturalism. According to Medievalist, Humanism is the fatal product of the middle ages (Kreis, 2000). Modern historians view humanism as the germinal period of modernism, therefore, it is assumed that the Renaissance man lived between medieval Christian matrix and scientific concepts. Therefore the man of the Renaissance is suspended from both, reasons and faith, because he does not believe in homogeneous point of view which determined the significance of each phenomenon, and he is yet to find security for his life, social principle stability and system of scientific concets (Kreis, 2000). The main focus of humanism is the rights of human beings, that is, they should be praised for the work they have done and their achievements. Humanists, therefore, produced literary work on ancient methodologies and their arts so that they can be remembered for their great work during that time (Kraye, 1996). The Renaissance Humanism was first introduced in Italy due to its connections with ancient Rome which is known for its artistic work and culture. Italians believed that they are the descendents of Romans therefore they felt the need to study the culture of their forefathers and their ancestors (Kraye, 1996). Until sixteenth century, there were no political thinkers produced due to the humanists movement because the Renaissance humanists were not engaged with politics till then. They were keen to accept professions in which they became bureaucrats, diplomats, teachers, courtiers etc. It was because most of the ancient literature was lost or was written in Greek which they require translating so that it can be reproduced and brought forward to be recognized by the worldly nations (Kraye, 1996). The Renaissance Humanism was first introduced in Italy due to its connections with ancient Rome which is known for its artistic work and culture. Italians believed that they are the descendents of Romans therefore they felt the need to study the culture of their forefathers and their ancestors (Kraye, 1996). The literary work they produced at that time on politics was not intended for focused audiences. They were more interested in producing literary work on ancient traditions of moral-rhetorical through which they desire to reform individuals, such as aristocrats, merchants and professional, and their society (Kraye, 1996). During fourteenth and fifteenth centuries, humanists changed the intellectual world which helped them to bring reforms in political science. Although, humanists were unable to produce any high ranked political thinkers as yet but during sixteenth century they produced two high ranked politicians in Europe named Niccolo Machiavelli and Thomas More whose literary work and writings exposed the tensions of contemporary political view and characteristics dilemmas (Kraye, 1996). There were two views and types of reformers. One believed that by reforming individuals they will be able to reform their institutions and the others believed that by reforming their institutions they will be able to reform the individual values. Many humanists began taking part in political affairs so that they may serve both purposes i.e. to reform individuals by reforming institutions and to reform institutions by reforming individual values (Kraye, 1996). Renaissance was the age of oligarchs and tyrants; it was the time when rulers had questionable titles which were illegitimate. Therefore, the humanists efforts were devoted to reforming individuals during fourteenth and fifteenth century so that they can later reform their institutions (Kraye, 1996). The cultural and philosophical movement swept across Europe during fourteenth, fifteenth and sixteenth century which lead to the modern era, ending the era of middle ages is known as Renaissance Humanism (Kraye, 1996). The main focus of humanism is the rights of human beings, that is, they should be praised for the work they have done and their achievements. Humanists, therefore, produced literary work on ancient methodologies and their arts so that they can be remembered for their great work during that time (Kraye, 1996). The Renaissance Humanism was first introduced in Italy due to its connections with ancient Rome which is known for its artistic work and culture. Italians believed that they are the descendents of Romans therefore they felt the need to study the culture of their forefathers and their ancestors (Kraye, 1996). Humanists first became bureaucrats, diplomats, teachers, courtiers etc., and produced literary work to influence individuals behavior, their perception and views so that they may change the system to reward those who take active part in building a society (Kraye, 1996). Most humanists were the believers of paganism while there were few others who did not believed in any god as they argue that religion is far from any social affairs. Amongst the common outline of those scholarly interests and their mental attitudes gathered under the rubric humanism, historians agreed that the humanists mentality stand between the contemporary scientific and their critical attitude, and medieval supernaturalism. According to Medievalist, Humanism is the fatal product of the middle ages (Kraye, 1996). Modern historians view humanism as the germinal period of modernism, therefore, it is assumed that the Renaissance man lived between medieval Christian matrix and scientific concepts. Therefore the man of the Renaissance is suspended from both, reasons and faith, because he does not believe in homogeneous point of view which determined the significance of each phenomenon, and he is yet to find security for his life, social principle stability and system of scientific concepts (Kraye, 1996). Until sixteenth century renaissance humanists were not associated with politics though they did produce some literary work but it was not intended for the focused group. However, these and other literary work changed the intellectual communitys perception and in sixteenth century two high ranked humanist politicians made valuable contributions to the humanists view of political sciences (Kraye, 1996). Buy custom The Renaissance Humanism essay

12 diferencias entre ciudadanos y residentes permanentes legales

12 diferencias entre ciudadanos y residentes permanentes legales Las diferencias en derechos entre un ciudadano americano y un residente permanente legal son numerosas y de gran importancia. Es fundamental saber las diferencias porque aunque la tarjeta de residencia, tambià ©n conocida como green card, permite que un extranjero viva y trabaje legalmente en Estados Unidos, pero no le da los derechos que sà ³lo pueden tener los estadounidenses. En este artà ­culo adems de seà ±alar cules son las 12 diferencias fundamentales se recuerdan dos obligaciones comunes y se seà ±ala cul es el camino a seguir para pasar de ser residente permanente legal a ciudadano de los Estados Unidos. 12  ejemplos de derechos que sà ³lo tienen los ciudadanos estadounidenses 1. Votar, previa registracià ³n, en elecciones nacionales para elegir presidente de los Estados Unidos, senadores y congresistas. Este derecho se mantiene en la mayorà ­a de los casos aà ºn cuando el ciudadano reside habitualmente en otro paà ­s. Es decir, los expatriados pueden votar. 2. Acceder a ciertos empleos limitados a ciudadanos. Estas son las 50 profesiones con ms demanda en el gobierno federal, con sus salarios y nivel de educacià ³n que se pide. Incluso hay que tener en cuenta que ciertos empleos que requieren previa autorizacià ³n por motivos de seguridad (clearance) pueden estar vetados a ciudadanos americanos con doble nacionalidad. 3. Ser elegido representante de los ciudadanos. 4. Actuar como jurado en juicios civiles o penales. 5. Poder solicitar la residencia permanente para familiares  en ms casos y ms rpidamente que los que son solamente titulares de una tarjeta de residencia. Pero recordar que para solicitar los papeles para padres o hermanos los ciudadanos deben de haber cumplido los 21 aà ±os de edad. 6. Poder vivir en el extranjero sin là ­mite de tiempo. Sin embargo, los residentes sà ­ tienen que tener cuidado con el tiempo que pasan fuera de Estados Unidos, ya que pueden quedarse sin la residencia. 7. Si cometen crà ­menes o faltas, los ciudadanos son responsables penalmente y/o civilmente, pero no pierden derecho a vivir en EEUU. Por el contrario, los residentes pueden ser deportados. 8. Adems, a diferencia de lo que ocurre con la green card la ciudadanà ­a no se tiene que renovar, es para toda la vida. Sà ³lo se pierde en casos extremos o por actos voluntarios expresos. Esta es una lista de famosos estadounidenses que renunciaron a su nacionalidad por causas muy diversas, aunque en la mayorà ­a de los casos fue para no pagar impuestos. 9. Los ciudadanos pueden tener una doble nacionalidad. Ya que EU no exige a los ciudadanos que se naturalizan que renuncien a su ciudadanà ­a original. Sin embargo, el paà ­s de origen sà ­ que puede exigir que sus ciudadanos que renuncien a su nacià ³n de nacimiento al jurar lealtad a los Estados Unidos. 10. Sà ³lo los ciudadanos  pueden pedir una visa para sus prometidos extranjeros. La finalidad tiene que ser casarse en los Estados Unidos.  Adems, los familiares inmediatos de ciudadanos, como son su cà ³nyuge, hijos solteros menores de 21 aà ±os y los padres, gozan de ciertos beneficios migratorios, como la posibilidad de ajustar su estatus en ms casos, etc. 11. Son estadounidenses y tienen derecho al pasaporte americano los hijos de ciudadanos nacidos en el exterior, salvo con ciertas limitaciones. Y eso es porque pueden transmitir su ciudadanà ­a a sus hijos sin importar su lugar de nacimiento. Es lo que se conoce como derecho de sangre. 12. Otra importante diferencia entre los ciudadanos y los residentes permanentes es que ciertos beneficios sociales como los cupones de alimentos y Medicaid aplican de manera distinta a residentes y ciudadanos. Obligaciones comunes a ciudadanos y residentes Aunque el estatus de ciudadano y de residente es distinto, existen obligaciones comunes a ambos. Por ejemplo, la de registrarse para el Servicio Selectivo  o la de pagar impuestos. Naturalizarse para obtener la ciudadanà ­a americana Los residentes permanentes pueden solicitar naturalizarse  cuando cumplen el  tiempo de espera de los residentes para aplicar por la ciudadanà ­a americana  que varà ­a dependiendo del caso. Si lo que da miedo es el examen de inglà ©s y conocimientos cà ­vicos hay que saber que en algunos casos es posible rendir el examen en espaà ±ol. Asimismo, algunos discapacitados podrà ­an no tener que rendirlo. Tambià ©n es posible preparar el examen en las clases gratuitas para la ciudadanà ­a que brindan numerosas organizaciones en todo el paà ­s o tomar este quiz o test de respuestas mà ºltiples para saber  si aprobarà ­as el examen de naturalizacià ³n  sobre conocimientos cà ­vicos.   Actualmente, el proceso de naturalizacià ³n dura un promedio de cinco a seis meses y debe iniciarse rellenando correctamente el formulario N-400.

The requisite behavior from diverse English proficiency levels Assignment

The requisite behavior from diverse English proficiency levels - Assignment Example The project main entailed an assessment of intra-language and inter-language inconsistency concerning the realization patterns of requests. The basic issues of the research of speech acts pertain to universality, which entails the determination of the degree of fundamental pragmatic types for particular acts anticipates to be dominant. Moreover, a suitable analytical framework for the assessment of speech acts advanced for this research is mainly based on a succession of a working hypothesis concerning constitutions of students for widespread features of requests.  The project main entailed an assessment of intra-language and inter-language inconsistency. The basic issues of the research of speech acts pertain to universality, which entails the determination of the degree of fundamental pragmatic types for particular acts anticipates to be dominant within any natural language. Suitable analytical framework for the assessment of speech acts advanced for this research is mainly based on a succession of a working hypothesis concerning constitutions of students for widespread features of requests.  Requests had three hypotheses concerning widespread characteristics namely requesting behavior is able to differentiate among fundamental phenomena encompassing kind of strategy as diverse from interior and external adjustment, requesting behavior is essentially based on selections from variability of alternatives stretching from direct to indirect issues, and the underlying scale of indirectness entails a minimum of three major types of alternatives.

Smart Car Case Study Example | Topics and Well Written Essays - 2000 words

Smart Car - Case Study Example smart car; Should Mercedes rethink its ambitions in the small-car segment and what are the chances that the "smart" car will be a commercial success and ,finally, can the "smart" car sustain a competitive advantage in the competitive microcar market The paper would end with strategy based marketing recommendations to make MCC's strategic process of strategic choice and analysis with in organizations in relation to its competition. The paper also takes a theoretical look at strategy making within the marketing function in the smart car before making the above referred recommendations. Swiss watch making is recognized by one brand name: Swatch. Swatch made it possible for the Swiss watch industry to emerge out of a bankruptcy threatening recession in the 1970s, when over-confident manufacturers stuck to old technology ignoring the impact of new quartz technology which had allowed cheap, accurate watches from the Far East to capture the market. Swatch has traversed substantial distance since its formation in 1983, when the two Swiss largest watchmakers, ASUAG and SSIH, realized that under the onslaught of the new technology they were facing liquidation. Some of the prestigious brands such as Longines, Omega and Tissot, owned by these two watch makers, became ideal targets for foreign acquisition. The two companies panicked and decided to join hands and invited Nicolas Hayek, CEO of the business consulting firm Hayek Engineering, to organize the strengthening exercise. Hayek brought about one of the most amazing turn arounds in business health through his two pronge d strategy in the face of fierce criticism. He amalgamated the two companies to form SMH (the company changed its name to Swatch in 1998); the Hayek Pool - Hayek himself and partners from Swiss industry - took over the majority of the shares, and Hayek became CEO. Then he radically altered the production lines and marketing. The now well known plastic Swatch watch was launched in the Swiss market in 1983, with 12 models with a price range narrowly defined between 39 and 50 francs. The basic product design was simplified from over 90 components to just 51 components, and remarkably all components could be welded together by robots on a single assembly line - the first on Swiss watch manufacturing landscape. This reduced skilled labour cost to almost naught as a proportion whereas in contrast in traditional Swiss watch making, the same cost used to account for as much as 10 % or more of cost of finished product. This made Swatch highly competitive in world markets. To add simplificati on and rationalization of production was the marketing ingenuity of Hayek. Hayek has ensured that strategic marketing plays an

Child Psychology Research Paper Example | Topics and Well Written Essays - 1250 words

Child Psychology - Research Paper Example Friendship tends to develop between people of similar age groups, sex, race, education, income, and occupational and marital status (Noller, et. al., 97-98). People tend to relate and communicate with people on their same level. Similarities are often the major attraction to building friendships. There are some cases of friendship that develops because of certain experiences that brings them together, allowing them to share something together. There are rarely friendships between two people without no connection on any of the above mentioned groupings or experiences. People tend to gravitate towards other people of the same background or of the same experiences as they have since the similarities tend to ground the friendship, make the friendship even more meaningful as it allows them to share something between them. This is mostly true for friendships between young adults. As one expands his environment, or his horizon, one tends to search for a group to belong with. This leads to s earching for people, whom he can develop a personal relationship with. Thus, this proves that one’s personality can easily be identified through the set of friends that they have and maintain. This is especially true in early adulthood friendship, as one faces different life experiences, he encounters different people which they can relate to. An example of this is the workplace, wherein one tends to gravitate towards people of the same position, income and educational background. In young adults, there are four major issues in the study of friendships (Noller, et. al., 98-100). These are the extent and depth of friendships, perceptions and understanding of friendship, gender differences and behavioral processes in the friendship. In the early adulthood stage, one experiences drastic changes in his environment, whether he is in the later part of his college life or on the early stages of a professional career

History of the Internet Essay Example | Topics and Well Written Essays - 2000 words

History of the Internet - Essay Example This paper will trace the history, growth and development of internet and how World Wide Web has changed the world which is based on the vision, hard labor and dedication of a few committed people. Internet is a network of networks that joins many government, university and private computers together. It provides an infrastructure for the use of e-mail, bulletin boards, file archives, hypertext documents and other computational resources (Slater, 2002). This network transports data and messages across distances which can be anywhere from the same office to anywhere in the world. The internet today is a widespread information structure and the initial prototype of internet is often called the National Informatics Infrastructure and has a complex history. The history of internet can be traced back to the launch and orbit of Sputnik I in 1957 which sent scientific and psychological shock waves in the science policy community as well as throughout American politics and the American public (Russell, 2001). This formed the basis for fundamental breakthroughs in American science, which resulted in a dramatic increase of federal spending on scientific research. Immediately after this, President Eisenhower created an agency known as Advanced Research Project Agency (ARPA later known as DARPA) which would be responsible for coordinating advanced, high-risk research that could lead to technological breakthroughs for the military at the height of cold war. The idea of ARPA was basically shaped by a group of scientists who feared that the government either misused or misunderstood modern science and technology. Since World War II scientists had been exploring how advanced computing could enhance national security. The SAGE air defense system, funded by the Air Force was developed by the MIT scientists during the 1950s (Russell, 2001). Computers were initially used as batch processing number-crunchers but subsequently they were used to work with people in real time to

Law coursework Essay Example | Topics and Well Written Essays - 2000 words

Law coursework - Essay Example Resulting from this unique position of power, directors are legally considered to stand in a fiduciary relationship with their company, and are subject to specific duties stemming from that relationship (Regal (Hastings) Ltd v Guliver (1967). Where an employee or director of a company (1) takes advantage of business opportunities made known to them during the course of their relationship and diverted such opportunities to themselves, (1) receives bribes from suppliers, and/or (3) engages in unlawful competitive activity, the employee or director will not be permitted to retain that benefit, as the law treats money or corporate opportunities as belonging to the principal company. In addition to this, if the person owing the fiduciary duty earns further profits from a breach of fiduciary duties, those profits also belong to the principal. Principals are in some circumstances entitled to trace the property received through to third parties. Moreover, even if the person has spent the mon ey or disposed of the assets in question, a fiduciary remains personally liable for the monetary equivalent of the benefit received (Gillhams). Over the time, the courts have construed company directors' fiduciary duties as being duties to: act in good faith and for proper purpose; a) avoid conflicts of interest; b) retain directors' discretion; and c) act with due care and skill; Directors also owe a duty of care to their company under the common law of negligence. In addition to these general law duties, directors owe statutory duties under the Corporations Act 2001 (Cth), (Stephens) such as duty to act in good faith in the best interest of the company and duty to prevent insolvent trading by company (Ibid). The Companies Act of 2006 provides seven general duties in the new statutory statement as follows: a)?A duty to act in accordance with the company’s constitution, and to use powers only for the purposes for which they were conferred. This replaces existing, similar duti es. b) a duty to promote the success of the company for the benefit of its members. This replaces the common law duty to act in good faith in the company’s interests. c) A duty to exercise independent judgment. There is no exactly equivalent duty at common law. However, directors are currently under an obligation not to fetter their discretion to act or to take decisions – this aspect of the general duty replaces this obligation. d). A duty to exercise reasonable care, skill and diligence. This replaces the existing duty of care and skill. e). A duty to avoid conflicts of interest (except where they arise out of a proposed transaction or arrangement with the company – see below). At present, if a director allows his personal interests, or his duties to another person, to conflict with his duty to the company then, unless shareholders consent to the conflict: (i) the company can avoid any relevant contract and (ii) he must account to the company for any ‘se cret profit’ he has made out of the arrangement. The new duty replaces this old rule. f)?A duty not to accept benefits from third parties. There is no express duty to this effect at common law. It appears to derive from the current duties (Freshfields 4). A director must not exploit his office for personal gain at the expense of the corporation and its stockholders, to whom he owes the utmost good faith (Babb and Martin 321).

The advantages and disadvantages of women in police Essay

The advantages and disadvantages of women in police - Essay Example It was, of course, the same male police administration that had refused over the years to assign women to general patrol and there by had blocked police women's access to the required experience2. However this trend could not be continued for long and they had to give the opportunity to women police. Finally when women were given the opportunity, as a result of Federal law mandating equal opportunity regardless of gender or race, to perform general police work and serve on patrol, they demonstrated their fitness for police work. Statistics point out certain facts about women police. In 2001, women accounted for only 12.7% of all sworn law enforcement positions in large agencies, 8.1% in small and rural agencies3, and 14.4% in federal agencies. Even though women gained an average of roughly half a percentage point per year within large police agencies from 1972 to 1999, there is increasing evidence that this trend is now reversed. For instance, the representation of women in large police agencies in 2000 and 2001 in reality declined from the year before i.e. from 14.3% in 1999 and 13.0% in 2000 to 12.7% in 2001. hence it can be clearly noted form these statistics that at the present rate, women will not achieve equality in large police agencies for several years to come. Obviously, if the similar trend continues barriers will continue to exist for women in the field of law enforcement4. There are advantages and also a few disadvantages of women in police force. As a result there is a controversy over how the women's policing style differs from men's style and also if this difference have any impact on overall policing. Many times it was observed by many of the researchers that women in the police service itself are reluctant to discuss these differences in styles. This is mainly because they think this may push them back into specialist positions that may have tremendous prestige but often limit good promotional opportunities. Many feminist groups, predominantly the U.S.-based National Center for Women and Policing, a project sponsored by the Feminist Majority, an activist feminist group in the U.S., believe that women's difference is an advantage5. Hence, they consider that, in many of the areas of police activity, women are especially adaptable and can even perform much better than men. There are certain unique works in policing that women can handle with more efficiency. For instance, policewomen are particularly suitable for working for special police prostitution groups, dealing with migrants in prostitution and trafficking in women within the larger cities. They are in fact becoming more and more experienced concerning working with police groups dealing with domestic violence and juvenile affairs. Policewomen are generally more acceptable to women and children who have been the victims of the misdeeds of men. In such cases girls and young children have more confidence in women. Today crime prevention is much more important than punishing for a crime after it occurs. The field of crime prevention is becoming more significant to police agencies and here policewomen play their greatest role. Women police are also gifted in gaining the confidence of children and in identifying antisocial

Law coursework Essay Example | Topics and Well Written Essays - 2000 words

Law coursework - Essay Example Resulting from this unique position of power, directors are legally considered to stand in a fiduciary relationship with their company, and are subject to specific duties stemming from that relationship (Regal (Hastings) Ltd v Guliver (1967). Where an employee or director of a company (1) takes advantage of business opportunities made known to them during the course of their relationship and diverted such opportunities to themselves, (1) receives bribes from suppliers, and/or (3) engages in unlawful competitive activity, the employee or director will not be permitted to retain that benefit, as the law treats money or corporate opportunities as belonging to the principal company. In addition to this, if the person owing the fiduciary duty earns further profits from a breach of fiduciary duties, those profits also belong to the principal. Principals are in some circumstances entitled to trace the property received through to third parties. Moreover, even if the person has spent the mon ey or disposed of the assets in question, a fiduciary remains personally liable for the monetary equivalent of the benefit received (Gillhams). Over the time, the courts have construed company directors' fiduciary duties as being duties to: act in good faith and for proper purpose; a) avoid conflicts of interest; b) retain directors' discretion; and c) act with due care and skill; Directors also owe a duty of care to their company under the common law of negligence. In addition to these general law duties, directors owe statutory duties under the Corporations Act 2001 (Cth), (Stephens) such as duty to act in good faith in the best interest of the company and duty to prevent insolvent trading by company (Ibid). The Companies Act of 2006 provides seven general duties in the new statutory statement as follows: a)?A duty to act in accordance with the company’s constitution, and to use powers only for the purposes for which they were conferred. This replaces existing, similar duti es. b) a duty to promote the success of the company for the benefit of its members. This replaces the common law duty to act in good faith in the company’s interests. c) A duty to exercise independent judgment. There is no exactly equivalent duty at common law. However, directors are currently under an obligation not to fetter their discretion to act or to take decisions – this aspect of the general duty replaces this obligation. d). A duty to exercise reasonable care, skill and diligence. This replaces the existing duty of care and skill. e). A duty to avoid conflicts of interest (except where they arise out of a proposed transaction or arrangement with the company – see below). At present, if a director allows his personal interests, or his duties to another person, to conflict with his duty to the company then, unless shareholders consent to the conflict: (i) the company can avoid any relevant contract and (ii) he must account to the company for any ‘se cret profit’ he has made out of the arrangement. The new duty replaces this old rule. f)?A duty not to accept benefits from third parties. There is no express duty to this effect at common law. It appears to derive from the current duties (Freshfields 4). A director must not exploit his office for personal gain at the expense of the corporation and its stockholders, to whom he owes the utmost good faith (Babb and Martin 321).

Factors Influencing Supply and Demand of Food Research Paper - 1

Factors Influencing Supply and Demand of Food - Research Paper Example It highlights the main reasons for some of these factors such as food scarcity, prices and volatility. Food scarcity is a significant issue affecting economies globally as they strive to maintain healthy communities. As population increases, pressure on arable land has mounted leading to reduced soil fertility and pasture for livestock production. Potential land for food production is no longer available for farming as a human settlement has continued to expand. FAO (2012) postulated that a 60% increase in food production will be required to sustain the global population by 2050. Many other forces are influencing the availability of food. Climate change and global warming have led to negative changes that have occurred in areas that formed part of the global food basket but no longer support farming as a result of reduced rainfall and desertification. Desertification in Africa, Asia and Southern Australia, arid areas of Spain, Northern and Southern America has caused significant food shortages. Poor farming methods, overgrazing and deforestation of vast areas have accelerated desertif ication to the current crisis leading to dire food shortage globally (Kendall & Pimentel, 2010). Among other dynamics, demand for food is influenced by socio-economic factors that influence people’s food habits. For example, improved incomes globally as more people are able to participate in gainful employment has increased the demand for expensive food such as fast foods and chicken that require more energy to produce compared to the conventional foods. Culture and religion influence what people believe to be edible and hence lower or increase demand for particular foods (Kendall & Pimentel, 2010). Nutzenadel & Trentmann (2008) argue that malnutrition and global food scarcity can be curtailed by discouraging prohibitive beliefs and promoting acceptance of a wide variety of food materials  especially animal proteins that are not eaten by members of certain religious and cultural groups such as pork consumption among communities in the Middle East and beef consumption among the Hindu. Many insect species have been found to be important protein sources but people have not accepted them as food sources (Brouver & Staveren, 2006).  

Processes in Producing a Chemical Reaction and Hazards

Processes in Producing a Chemical Reaction and Hazards Elephant Toothpaste Objective/aim Understand the processes involved in producing a chemical reaction Identify hazards involved with using particular chemicals Demonstrate an understanding of chemistry terms such as catalyst, oxidation, and exothermic (Harper Nickels, 2008). Background Information The elephant toothpaste experiment is an experiment that produces great amount of steaming foam (Helmenstine, 2014). Its great amount of foam is what makes it look like a toothpaste an elephant would use. The experiment makes use of hydrogen peroxide (H2O2) solution. Hydrogen peroxide is a germiadral agent composed of water and oxygen. It kills disease organisms, like ozone does, using oxidation. It kills microorganisms by oxidizing them which can be described as a â€Å"Controlled burning process† (Hinrichs, 1986). When hydrogen peroxide reacts with organic material, it breaks down into oxygen and water. It can be used in varies ways example, disinfection, mouthwash, hair lightening and contact lenses. In our bodies hydrogen peroxide is produced to fight infections, which must present for our immune systems to function correctly and healthy (Helmenstine, 2014). White blood cells are known as leukocytes, a sub-class of these cells ‘Neutrophils’ produces hydrogen peroxide as the first defence against toxins, parasites, bacteria, viruses and yeasts (Helmenstine, 2014). Hydrogen peroxide is most used in toothpastes and as a cure for toothaches. In this experiment we also use yeast or saturated potassium iodide solution as a catalyst to make the peroxide molecule release the oxygen faster (Harper Nickels, 2008). Yeast is a fungi which converts the catalase hydrogen peroxide into harmless water and oxygen (Spangler, 2013). The overall equation for this reaction is: 2 H2O2 (aq) à ¯Ã†â€™Ã‚   2 H2O (l) + O2 (g) The decomposition of the hydrogen peroxide into water and oxygen is catalysed by the iodine ion or dry yeast. It also releases a small amount of the heat so the reaction is exothermic. (Helmenstine, 2014) H2O2 (aq) + OI (aq) à ¯Ã†â€™Ã‚   I (aq) + H2O (l) + O2 (g) The dishwashing detergent used captures oxygen as bubbles. Food colouring adds colour to the foam which can be optional. Chemicals and Materials You will need: 20mL Hydrogen peroxide (30%) 5mL Sodium iodide solution 2M Dishwashing liquid Food colouring Rubber gloves for clean up (Harper Nickels, 2008). Labware and apparatus A funnel Dropper Beaker 500 mL Graduated cylinder Safety goggles Plastic bottle (2l Cold drink bottle) Glass rob Spatula Safety Hazards: The bottle will become very hot. Allow the bottle to cool before touching it directly. Hydrogen peroxide is a very strong oxidizing agent and may cause severe skin burns. Store hydrogen peroxide in a cool, dark area away from reducing agent and organic materials. Do not lean over the bottle when solutions are mixed it is an exothermic reaction. Experiment should not be done near an open flame. The solution can be washed down the drain with excess water (Carolina.com., 2014). Experimental Procedure Put on your goggles and gloves. Have a couple of students feel the side of the graduated cylinder. Measure 60ml of hydrogen peroxide from your source bottle into the beaker. Pour the entire 60ml into the bottom of your container. Place 10g of potassium iodide in the plastic portion cup. Add 10ml of water and 3ml of liquid detergent. Stir all the chemicals together using a wooden stick. Open the bottle of food colouring mixed half and half with glycerine or corn syrup and exactly 2ml of the dye. Dribble it down one side of the container that you are using. Add the mixture of soap, water and potassium iodide to the hydrogen peroxide in the container. The potassium iodide will separate into potassium and iodide ions. Once the experiment is complete ask a couple of students to come up and carefully touch the sides of the bottle and describe the temperature for all the other students in the laboratory (Meerman, 2009). Outcome of experiment The experiment produces a large amount of foam as a result of the dishwashing detergent that was added. The foam shoots out of the container like toothpaste would if you squeezed the container. The foam produced is safe to play around with as they only contain soap and oxygen from the hydrogen peroxide. We will also observe the catalytic reaction rate by the combining of yeast, hydrogen peroxide and dish washing liquid detergent (Spangler, 2013). Source of experiment Steve Spangler Science. (2008). Elephants toothpaste. Retrieved October 30, 2008, from www.stevespanglerscience.com. Material safety Hydrogen Peroxide Personal Protective Equipments Eyes: Wear appropriate protective eyewear or chemical safety goggles. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate clothing to prevent skin exposure. Potential Health Effects Eye:Contact with eyes can cause severe burns and corneal damage. Skin: Cause severe skin irritation and possible burns. May cause skin irritation, redness, swelling and formation of blisters. Ingestion: Causes Nausea, vomiting and diarrhoea, gastrointestinal tract burns. May cause difficulties in swallowing, stomach distension, possible cerebral swelling and death. Ingestion might also result in irritation of the esophagus, bleeding of the stomach and ulcer formation. Inhaling: Can cause burns in the respiratory tract causing nasal tissue, insomnia, nervous tremors with numb extremities, chemical pneumonia unconsciousness and death. At high concentration respiratory effects may cause acute lung damage and delayed pulmonary oedema. Chronic: Can cause dermatitis due to prolonged or repeated skin contact. Mutagenic effects and corneal damage if repeatedly contacted. First Aid Measures Eyes:Get medical aid immediately. Do not rub eyes or keep eyes closed. Extensive irrigation with water is required immediately. Skin:Get medical aid immediately. Flush skin with plently of water for at least 15 minutes while removing contaminated clothing. Wash clothing before reuse. Ingestion:Do not induce vomiting. Give 2-4 cups of milk or water, if unconscious don’t give anything, get medical aid immediately. Wash mouth out with water. Vomiting may occur, give water to further dilute the chemical. Inhalation:Get medical aid immediately. Move person to fresh air immediately. If breathing is difficult, give oxygen. Do not perform mouth to mouth. You can use a bag and a mask for artificial respiration if breathing ceases. Fire Measure Use only water, do not use dry chemicals or pour water into containers. Contact professional fire fighters immediately. Cool containers with flooding quantities if water until well after fire is out. For large fires, flood fire area with large quantities of water while knocking down vapours with water fog. Handling Wash hands thoroughly after handling. Wash contaminated clothes before reuse. Use only in a well ventilated area. Do not get in eyes, skin or on clothing. Store protected from light. Unused chemical must not be returned to the container. Storage Keep away from heat, sparks and flame. Do not store near combustible materials. Keep containers closed when not in use. Store away from light. Store only in light resistant containers fitted with a safety vent. Questions and Answers What type of reaction is this? Decomposition (1) What happen to the reaction when the iodine is drop into the hydrogen peroxide? There is a large amount of heat released and the hydrogen peroxide is decomposes in to water and oxygen. (2) Write the balanced chemical equation for the reaction taking place between the hydrogen peroxide and the iodine. H2O2 (aq) + OI (aq) à ¯Ã†â€™Ã‚   I (aq) + H2O (l) + O2 (g)(5) Which enzyme did we add to help break down hydrogen peroxide? Iodine (1) What is the gas that is being released? Oxygen (1) Reference list Helmenstine, A.M. (2014). Elephant toothpaste chemistry demonstration. Available: Chemistry.about.com/od/chemistrydemonstrations/a/elephant-tooth.htm. [Accessed: 28 August 2014 ]. Himrichs, E.J. (1987). Hospital periodontics a survey of hospital utilization by American academy of periodontology members. Journal of periodontology. 57(11), 663-671. Harper, A. and Nickels, K. (2008). Elephant’s toothpaste. University of technology: Queensland. Spangler, S. (2013). Elephant’s toothpaste. Available: www.stevespanglerscience.com/lab/experiments/elephants-toothpaste. [Accessed: 28 August 2014 ]. Carolina.com. (2014). Carolina world class science and maths. Available: http://www.carolina.com/chemistry/experiments/elephant.asp. [Accessed: 27 August 2014]. Meerman, R. (2009). Teacher Demonstration 26: Elephant’s Toothpaste. Available: http://www.abc.net.au/science/surfingscientist/pdf/teachdemo26.pdf. [Accessed: 26 August 2014]. Elephant TootpastePage | 1

Spying :: essays research papers

With the growing deviant behavior around the country, law enforcement has developed 21st century surveillance techniques and methods. Now people are continually monitored to keep the public in check and obey the laws of the state. The government can supervise citizens with a new speed monitoring technology replacing highway patrol officers. In addition to speed cameras, car manufacturers have developed an On-star system, can assist motorists who need directions, have car troubles, or even order flowers for a loved one. The ingenious system that takes individual pictures of every car that passes an operational camera and then proceeds to calculate the speed at which the vehicle is traveling at the time of the photograph. This new way of apprehending speeders causes apprehension for some drivers, fear in others, and even disgust for some owners.   Ã‚  Ã‚  Ã‚  Ã‚  The automated ticket surprises people when casually opening their mail. It gives them a reminder about the importance of following the laws even when someone thinks they are not being monitored. But the main argument surrounding the heated topic of computer-generated Highway Patrol is the unknown driver of the vehicle. The tickets are written to the owner of the vehicle, the owner is not always the driver consequently, unfairly penalizing unsuspecting people.   Ã‚  Ã‚  Ã‚  Ã‚  Personal surveillance has gained in popularity in the past couple of years. Cameras are hidden through houses, trip meters in cars record the top speed and number of miles each day, and an assistance program is installed in select automobiles. The On-star system assists owners of GMC cars with driving directions, car troubles, and theft using the global positioning system. A private company via satellite that can access the vehicle’s location, model, and year operates this system. The technicians answering all the calls from the owners of the cars have complete access to personal information politely addressing the caller by name. This system deters criminals from stealing cars equipped with On-star because the operators can easily locate a stolen vehicle. Therefore, the police can track down the stolen car in a matter of minutes, with the help of the On-star company. It is an uncanny feeling to have an On-star technician give a driver the exact position of their vehicle.   Ã‚  Ã‚  Ã‚  Ã‚  The trip meters allow owners of a vehicle to check on other drivers of that car. By recording the date, distance traveled, and top speed of the day, the owner can monitor other driver’s aggressiveness and honesty.

Virginia Woolf Essay -- essays papers

An Author’s Brush Virginia Woolf is not unlike any other truly good artist: her writing is vague, her expression can be inhibited, and much of her work is up to interpretation from the spectator. Jacob’s Room is one of her novels that can be hard to digest, but this is where the beauty of the story can be found. It is not written in the blatant style of the authors before her chose and even writers today mimic, but rather Jacob’s Room appears more like a written painting than a book. It is as if Woolf appeared tired and bored of the black and white style of writing that dominated her culture and chose to use a paintbrush to write her story. This individualistic technique is essential to how Woolf creates a portrait of Jacob, the title character of the novel. The portrait the reader gets of Jacob is entirely questionable throughout the entire story, just like any understanding of a human in life is more about opinion than fact. This is how Woolf captures life, the reader’s view of Jacob is almost completely based on interpretations from other characters. These various assessments of Jacob form together to make the collective portrait of Jacob. Woolf states that â€Å"Multiplicity becomes unity, which somehow the secret of life† (147), the secret of the novel as well. The impressions of Jacob are from many different types of characters in the book. There are random people that we don’t even get the name of, Jacob’s own mother, those that love Jacob and even those whom Jacob love. All these impressions are woven on a common thread, that all human being’s have a need to break isolation and cherish attention, love and concreteness. Jacob’s mother, Betty Flanders, sets up her portrait of Jacob as a son that she has lost. Betty Fland... ...s less a true depiction of Jacob himself, but rather the people that tried to interpret him. Jacob's Room is not finally about Jacob, but about the world that forms him. Trying to understand Jacob is task that is just as difficult as finding a place for his empty shoes, at best those who felt closest to Jacob were just observers of his life, â€Å"observer(s)...choked with observations† (75). The portrait of Jacob created from the novel is less a portrait and more like a â€Å"cavern of mystery, endowing Jacob Flanders with all sorts of qualities he had not at all† (80). Our portrait of Jacob is painted to us by Virginia Woolf about the dubiety, skepticism and wonder over true human existence and if it is at all possible to achievew it. Jacob’s own room is exactly that, something so real and physical that is at the same time departed and lifeless. Bibliography:

Quantitative Determination of Sulfate by Gravimetric Analysis Essay

1. Synopsis: This report is written about determining the quantitative amount of sulphate inside barium sulphate, BaSOâ‚„, using the method of gravimetric analysis. This quantitative determination is done by the addition of a dilute solution of barium chloride slowly to a hot unknown sulfate solution slightly acidified by concentrated hydrochloric acid, HCl. The white precipitate of barium sulphate is filtered off, washed with water, oven-dried, and weighed as barium sulphate. The quantitative amount of sulphate is deduced from mathematical calculations. The results of the experiment, however, did not yield positively, probably due to inadvertent human error over the course of the experiment. The percentage yield of sulphate inside barium sulphate attained from our results was not up to expectations. The percentage yield of sulphate was expected to be at least 90% and above, with >90% as a good percentage yield. Instead, we attained 54% percentage yield of sulphate. 2. Objective: The purpose of the experiment is to determine the quantitative amount of sulphate inside barium sulphate using the method of gravimetric analysis. 3. Theory: 3.1 Summary: Throughout the duration of the experiment, there are many procedures, techniques, chemicals, and instruments used to produce the results of the experiment. There are a total of three simple sets of procedures required, in the gravimetric analysis method, in order to create the results of the experiment. The first procedure is the precipitation of BaSOâ‚„, barium sulphate, followed by the second procedure, the washing and filtration of BaSOâ‚„ precipitate. The third and final procedure is the drying and weighing of the dry sample of BaSOâ‚„ precipitate. From there, the results are gathered by methodical mathematical calculations. 3.2 Technique: Gravimetric Analysis: Gravimetric analysis is a series of methods in analytical chemistry for finding the quantitative amount of a certain analyte based on a sample of solid. To perform gravimetric analysis, one of the most common methods is to convert the analyte into a solid via the use of precipitation with the appropriate reagent chemicals. After that, the precipitate is collected via filtration, washed, dried, off all moisture content, and weighed. Then, the quantitative amount of analyte in the sample is calculated from the mass of the precipitate and its chemical composition. There are many advantages using gravimetric analysis. It allows for extremely precise analysis, such as the determination of many elements’ atomic masses up to six decimal places. It also does not require expensive scientific equipment to perform such analysis and, furthermore, it can even be used to calibrate scientific instruments in lieu of international reference standards. 3.3 Chemicals: During the experiment, some chemicals were used to obtain the barium sulphate, BaSO4, from which the quantitative amount of sulphate can be found from within. The chemicals used were dilute 10% barium chloride solution, BaCl2, dilute 0.5% sodium sulphate solution, (Na)2SO4, and concentrated hydrochloric acid solution, HCl. In order to obtain barium sulphate, a chemical process, known as the displacement reaction, was utilised. In the displacement reaction, the cations and anions switch places from their original compounds to form entirely different compounds. In this experiment, 10% barium chloride solution is added to 0.5% sodium sulphate solution (which is slightly acidified by adding concentrated hydrochloric acid), resulting in the formation of soluble barium sulphate. 3.4 Instruments: In the experiment, various scientific instruments were used in the determination of the quantitative amount of sulphate. The following instruments were used, were the 250ml beaker, the bulb filler and vacuum-assisted pipette, the measuring cylinder, the watch glass, the laboratory crucible, the vacuum pump, the hot air oven, the desiccator, and the digital analytical weighing balance. The 250ml beaker is a cylindrical container with a flat bottom, which is used as a simple container to stir, heat, or mix various liquids. The vacuum-assisted pipette is a hollow narrow cylinder that has a large bulge with a single graduation mark as it is calibrated for its specific volume, generally between 10ml, 25ml, and 50ml. The bulb filler is the simplest form of the pipette dispenser, using pinch valves to draw air within to create a vacuum within the vacuum-assisted pipette. The two pieces of laboratory equipment are generally used in conjunction with one another. The bulb filler is carefully inserted on top on the vacuum-assisted pipette. The pinch valves can be manipulated to draw the liquid inside the pipette. The measuring cylinder is a narrow cylinder with a flat base that is used to measure amounts of liquid with the corresponding markings along the cylinder. The watch glass is a circular, slightly convex-concave piece of glass that is generally used to evaporate a liquid, hold solids being weighed, or as a cover for the beaker. The laboratory crucible is a cup-shaped piece of laboratory equipment made to contain chemical compounds as they are heated to extremely-high temperatures. The hot air oven is an electrical oven used to dry chemical compounds or sterilise articles. The desiccator is a sealable enclosure that is used to preserve items sensitive to moisture in the open air, such as cobalt chloride paper. The digital analytical weighing balance is type of electronic balance made to measure small amounts of mass up till several decim al figures. 4. Procedures: In order to determine the quantitative amount of sulphate, the procedure that is split up into three smaller sections. The first section is the precipitation of barium sulphate. The second section is the washing and filtration of the barium sulphate precipitate. And, the third section is the drying and weighing of the barium sulphate precipitate. 4.1 Precipitation of BaSO2: 1. Use the bulb filler and vacuum-assisted pipette to pipette 25ml of the 0.5% sodium sulphate solution into a 250ml beaker. 2. Add 50ml of water and 5 drops of concentrated hydrochloric acid into the beaker. Note: Concentrated hydrochloric acid is highly corrosive. Add the concentrated hydrochloric acid into the beaker while handling it in the fume hood with protective gloves and goggles. 3. Heat the beaker until it is boiling. Use a glass rod to stir the solution vigorously, while adding 10ml of 10% barium chloride solution from a measuring cylinder drop-by-drop. 4. Use a watch glass to cover the beaker and adjust the heat to just below temperatures. Leave it there to digest for 20 minutes. 5. To test for complete precipitation, add a few drops of barium chloride and observe to see if there is clear supernatant liquid. 4.2 Washing and Filtration of BaSO4 Precipitate: 1. Take two pieces of filter paper and place them at the base of the dry and weighed laboratory crucible. Ensure that the filter paper pieces cover the base of crucible completely. Then, use the vacuum pump to decant the clear supernatant liquid by filtration into the crucible. 2. Dislodge any particles in the beaker and rinse it with warm deionised water. Empty the contents into the crucible while the vacuum pump is at work. Make sure that all the solids in the beaker have been transferred to the crucible. 3. Wash the barium sulphate precipitate further with warm deionised water at the vacuum pump twice more. 4. Discard the filtrate. 4.3 Drying and Weighing of BaSO4 Precipitate: 1. Place the crucible, containing the BaSO4 precipitate, into the hot air oven. Set the temperature to 150 °C and leave it for half an hour. 2. Use the desiccator to cool the crucible and precipitate for 10 minutes. 3. Once the crucible has cooled down, weigh it using the digital analytical weighing balance. 4. The weight of the BaSO4 precipitate is calculated from the difference between this weight and the weight of the empty crucible including the filter papers. If there is still sufficient time, you may repeat the above Steps 1-4 until a constant weight of the precipitate is successfully obtained. 5. Results and Calculations: | 1st Drying:| 2nd Drying:| Mass of Crucible + Filter Paper + Sample:| 31.9078g| 32.0188g| Mass of Crucible + Filter Paper:| 31.7975g| 31.9071g| Mass of Sample (BaSO4):| 0.1103g| 0.1117g| The mathematical calculations to attain the results of this experiment are listed below: 0.5% of sodium sulphate (NaSO4) = 5100 Ãâ€"25g = 0.125g Composition by mass of SO42- = Molecular weight of sulphate ionMolecular weight of sodium sulphate Ãâ€" 0.125 = 0.0845g (4 significant figures) Composition by mass of SO42- prepared = Molecular weight of sulphate ionMolecular weight of barium sulphate Ãâ€"0.1103g = 0.04544g (4 significant figures) Percentage yield of sulphate = 0.045440.0845 Ãâ€"100% = 53. 775% ≈ 54% 6. Discussions: The objective of this experiment was to determine the quantitative amount of sulphate using the gravimetric analysis method. The quantitative amount of sulphate was measured in percentage yield, which we attained 54% instead of the expected percentage yield of 90% and above. It became obvious that somewhere along the way, in conducting the experiment, a significant error had been committed. After much analysis, it was found that there had been some sources of error that accounted for the less-than-satisfactory results. One major source of error could be the contamination of the intended precipitate through the use of laboratory instruments and vessels that were not cleaned properly. When the instruments and vessels are unclean, any left-over remains of chemicals and compounds could be unintentionally released to the intended precipitate and polluted it through a process known as co-precipitation. The foreign species could have reacted with the intended precipitate and resulted in the loss of much of the sulphate ions, leaving only 54% instead of the intended 90% and above. To avoid any possible error of contamination, one must keep in mind to properly clean the instruments and vessels to use in the experiment. One way to minimise the co-precipitation of substances would be leaving the solution, containing the soluble precipitate of barium sulphate, in the process of forming the precipitate, to digest longer than the standard 20 minutes. Another source of error could be the decomposition of the precipitate itself during the process of removing moisture content in the hot air oven. The ignition can result in the losses via decomposition of the potentially-volatile precipitate. 7. Conclusion: In conclusion, the results were not up to expectations due to a few sources of error that caused the less-than-satisfactory results. Gravimetric analysis is a proven set of methods to use in the field of analytical chemistry. It allows for extremely precise results, if the procedures were followed very carefully, and no errors were committed over the course of the experiment. However, we did not attain 90% and above for the percentage yield of sulphate as we committed some errors unknowingly. Contamination was a major issue in the experiment that would have been avoided if only we had properly cleaned the instruments before performing the experiment. In short, the objective of the experiment was fulfilled by attaining sulphate using the gravimetric analysis method, although not all of it was attained. 8. References: Online References: Theory: 1. Wikipedia: Gravimetric Analysis Available from: http://en.wikipedia.org/wiki/Gravimetric_analysis Accessed from: 20th June 2013 2. Wikipedia: Instruments Available from: http://en.wikipedia.org/wiki/Beaker_(glassware) http://en.wikipedia.org/wiki/Pipette http://en.wikipedia.org/wiki/Measuring_cylinder http://en.wikipedia.org/wiki/Watch_glass http://en.wikipedia.org/wiki/Crucible http://en.wikipedia.org/wiki/Hot_air_oven http://en.wikipedia.org/wiki/Desiccator http://en.wikipedia.org/wiki/Analytical_balance#Analytical_balance Accessed from: Accessed from: 20th June 2013 3. R.L. Watters, Jr, 1997, Gravimetry as a Primary Method of Measurement Available from: http://www.rminfo.nite.go.jp/common/pdfdata/4-002e.pdf Accessed from: 20th June 2013