Food Addictives Essay Example for Free

Food Addictives Essay This food additives essay is basically an advantages and disadvantages essay. You need to be careful with the word ‘outweigh’ as this often confuses students. The word ‘outweigh’ can be placed in different ways in the sentence so rather than work it out, it is better to think of it simply as ‘are there more advantages or disadvantages Decide what you think there are more of and then state this in the thesis statement without mentioning the word ‘outweigh’. For example, look at the thesis statement from the food additives essay model answer: In my opinion, the potential dangers from this are greater than the benefits we receive. ‘Outweigh’ questions do suggest, though, that there are definitely both advantages AND disadvantages, so you should discuss both. However, make sure your essay supports your opinion. For example, if you have said there are more disadvantages, it would not make sense to then write mostly about advantages. As you can see from the model answer, advantages are discussed, but the focus is on the disadvantages as this is what it is stated are greater in the thesis statement. Model Essay 15 Food Additives Essay You should spend about 40 minutes on this task. Present a written argument to an educated reader with no specialist knowledge of the following topic. Do the dangers derived from the use of chemicals in food production and preservation outweigh the advantages? Give reasons for your answer and include any relevant examples from your own experience or knowledge. You should write at least 250 words. www.ieltsbuddy.com Free online IELTS Advice www.ieltsbuddy.com Free online IELTS Advice Food Additives Essay Model Answer Most foods that are purchased these days in small stores and supermarkets have chemicals in them as these are used to improve production and ensure the food lasts for longer. However, there are concerns that these have harmful effects. In my opinion, the potential dangers from this are greater than the benefits we receive. There are several reasons why chemicals are placed in food. Firstly, it is to improve the product to the eye, and this is achieved via the use of colourings which encourage people to purchase food that may otherwise not look tempting to eat. Another reason is to preserve the food. Much of the food we eat would not actually last that long if it were not for chemicals they contain, so again this is an advantage to the companies that sell food as their products have a longer shelf life. From this evidence, it is clear to me that the main benefits are, therefore, to the companies and not to the customer. Although companies claim these food additives are safe and they have research to support this, the research is quite possibly biased as it comes from their own companies or people with connections to these companies. It is common to read reports these days in the press about possible links to various health issues such as cancer. Food additives have also been linked to problems such as hyperactivity in children. To conclude, despite the fact that there are benefits to placing chemicals in food, I believe that these principally help the companies but could be a danger to the public. It is unlikely that this practice can be stopped, so food must be clearly labeled a nd it is my hope that organic products will become more readily available at reasonable prices to all.

AC DC Three Phase Generators

AC DC Three Phase Generators Aims and Objectives The main objective of this report is to describe the investigation into operating characteristics of AC-DC Three-Phase generators and motors. The following subjects must be covered in this report for it to successfully document the investigation, these subjects will be constructed using a series of lab experiments and learner comments:- Operating characteristics of DC and AC generators supplying resistive, capacitive and inductive loads. Relationship between speed, current, power factor, and efficiency of a cage induction motor, capacitor start induction motor, synchronous motor and DC motor. Analyse the results from each of the experiments done and provide graphical analysis of the results. Introduction/ Background It is well known that the most regular type of power to be generated around the world is three phase AC. The reasons being are:- Three phase power is needed for the use of the most efficient types of industrial motors. It is considered to be the most efficient form of electrical energy to generate and distribute. Due to the performance of three phase, the size and weight of devices using it such as generators and motors are lower compared to devices using other power systems. Although it should be noted that the performance of an AC system is dependant on the power factor, not just the load in terms of current. In-order to successfully investigate the subject of AC vs. DC a total of six practical tests were completed, the practical tests will be documented in the following report and analysed. The tests completed:- AC induction motor torque-speed characteristics AC synchronous motor torque-speed characteristics AC capacitor start induction motor torque-speed characteristics DC motor torque-speed characteristics DC generator output characteristics AC generator output characteristics AC Induction Motor Test An induction motor is an asynchronous motor where through electromagnetic induction power is supplied to the rotating device. In some contexts an induction motor can be described as a rotating transformer because the stator can be shown to be the primary winding and the rotor as the secondary winding. Induction motors can be found regularly in industrial situations. Induction motors get their popularity from being rugged in construction, and from not having brushes. There is more than one design of induction motor a few examples are:- Squirrel Cage Rotor Motor Wound Rotor Motor Double Cage Rotor Motor Each of the above motor designs has its own merits; the type of motor to be used in this experiment is the cage rotor motor. Squirrel Cage Rotor Motor:- A cage induction motor rotor shown in the illustration below consists of a series of conducting bars laid into slots carved into the face of the rotor and shorted at either end by large shorting rings. The design is known as the cage rotor because of the conducting bars, if examined they can be seen to look like a squirrel or hamsters exercise wheel. 1Squirrel Cage Motor Construction Test The purpose of this test was to find the torque-speed characteristics of an AC induction motor. The characteristics that will be analysed against torque are:- Speed Current Output Power Power Factor Efficiency The basic idea behind the test, the motor is run at full speed and is connected to a brake unit. The brake unit can be adjusted to make the motor produce more or less amounts of torque. Starting at low motor torque, readings of current voltage and power are taken, then readings continue to be taken all they way to near stalling point. The test equipment is as follows:- Circuit Diagram for Cage Rotor Induction Motor Test:- Block Diagram To further explain and simplify, a block diagram of the test is included below. This shows exactly how the system operates. Brake Motor Three Phase Supply Torque Control Speed (rev/min) Ammeter, volt meter, watt meter Test Procedure A completely extensive test procedure can be found in the appendix taken from the Student Guide of TecQuipment Electrical Machines FH2 refer to appendix !!!. Results Table T.1 Torque (Nm) Speed (rev/min) Output Power (W) Wattmeter Wa (W) Wattmeter Wb (W) Input Power (W) Line Current (A) Line Voltage (V) Volt-Amperes (VA) Power Factor Efficiency (p.u.) 0.1 1500 15.708 80 0 80 0.35 245 148.52336 0.5386 0.1963495 0.2 1450 30.369 85 10 95 0.38 245 161.25393 0.5891 0.3196708 0.3 1450 45.553 95 20 115 0.4 245 169.74098 0.6775 0.3961139 0.4 1440 60.319 100 30 130 0.42 245 178.22803 0.7294 0.4639891 0.5 1425 74.613 110 40 150 0.45 245 190.9586 0.7855 0.4974188 0.6 1400 87.965 120 50 170 0.5 245 212.17622 0.8012 0.5174388 0.7 1390 101.89 130 60 190 0.55 245 233.39385 0.8141 0.5362754 0.8 1360 113.94 145 65 210 0.57 245 241.8809 0.8682 0.5425481 0.9 1350 127.23 160 80 240 0.65 245 275.82909 0.8701 0.5301438 1 1.1 1.2 1.3 1.4 The values for output power, volt-amperes, input power, power factor and efficiency were calculated using the following relationships:- Problems:- Before the results are expressed in graphical form and commented on, the report discusses any problems that occurred during the lab experiment. Only one major issue occurred during the induction motor test. The fault was due to a wiring error. A link was missing on one of the watt meters which caused the motor to single phase and not rotate. It was easy to see that it was single phasing because the current measured for one of the phases was zero, indicating an open circuit somewhere. The link was quickly replaced and the test could begin. Graphical Analysis:- Now the report illustrates the results in the table T.1 in a graphical form, to make comparison the results from the test equipment manufacture have been included as a guide. Speed vs. Torque The above graph shows the relationship between speed and torque, it shows that at a low torque the speed is at its maximum but as the torque increases the adverse happens to the speed. This is expected because increasing the torque of the motor is adding more mechanical load, thus slowing the motor down. 2Manufactures graph of Speed versus Torque (Cage Induction Motor) The graph above is a representation of the results that the manufacturer of the test machines gives as a guide. It is possible to see that from a torque of 0.1Nm to 0.9Nm the results are similar to the report authors. The torque was not taken any higher than 0.9Nm in the authors test as stalling the motor was not a desired outcome. Output Power vs. Torque This graph shows the relationship of output power versus torque taken from the lab results in table T.1; it has an obvious linear upward trend. It is expected that the output power increases as more load is put on the motor, because the motor has to work harder to maintain rotation. 3Manufactures graph of Output Power versus Torque (Cage Induction Motor) The manufactures results also share the same upward trend as the authors, but again the manufacture has taken the results past 0.9Nm and taken the motor into a stalling condition. Line Current versus Torque The graph above shows the results of torque against line current, a good upward trend is visible. This indicates that as the torque increases so does the line current, this again is due to the increase in load on the motor. 4Manufactures graph of Line Current versus Torque (Cage Induction Motor) The guide results from the manufacture complement the results that the author recorded. A steady rise is shown from around 0.35-0.4A to 0.6-0.7A at about 0.9Nm. Power Factor versus Torque The graph is showing the results from the practical lab experiment, the calculated power factor versus the torque. It can be seen from the upward trend of the graph that as the torque of the motor increases, so does the power factor. It will be later seen in the report that because the power factor increases with torque so will the efficiency. 5Manufactures graph of Power Factor versus Torque (Cage Induction Motor) The guide results above show similarities with the results gained through practical lab experiments. Torque vs. Efficiency The graph is showing the relationship between efficiency and torque, the efficiency increases as the torque does, this is expected because the output power increases with the torque. The peak efficiency occurs at around 0.75-0.8Nm after which the efficiency starts to reduce. 6Manufactures graph of Efficiency versus Torque (Cage Induction Motor) The graph above shows the relationship of torque and efficiency, the manufactures results show a similar trend to that of the authors. The results from the manufactures show more of the downward trend after 0.8Nm to eventually stalling point. Conclusion Overall the results acquired through practical experiment show encouraging results, both towards theory and also towards the manufactures guide results. Some of the graphs could have been a more steady results but it is not possible to get perfect results on something like this without doing the test many more times and taking average values. The trends do illustrate what is expected, so this means the equipment was set up correctly, and the test was carried out uniformly to manufactures guidelines. The induction motor is capable of supplying torque when needed but it will not maintain a constant speed. AC Synchronous Motor Test The major characteristic of a synchronous motor is that it stays at a constant speed regardless of no load or full load. Under certain conditions they can produce a power factor that is capable of correcting a low power factor from an inductive load. A common use for a synchronous motor is to drive a DC generator. They come in all sizes from small to thousands of horsepower. The synchronous motor works by the application of three-phase AC power to the stator which causes a rotating magnetic field. The rotor sits inside this magnetic field, and is energised with a DC voltage. The rotating magnetic field of the stator attracts the rotor magnetic field caused by the DC voltage, and a strong rotating force is then imposed on the rotor shaft. This is one of the disadvantages of the synchronous motor, it needs a DC excitation voltage to start without this the rotor will not start turning. This characteristic causes the motor to have poor starting torque, most of its torque is when it is running at synchronous speed. 7Showing the parts making up a synchronous motor Test The purpose of this test was to find the torque-speed characteristics of an AC synchronous motor. The characteristics that will be analysed against torque are:- Current Output Power Power Factor Efficiency Speed has not been considered because of the way the motor operates, a constant speed should be apparent throughout the test. In the test the motor is ran at full speed, and an adjustable brake unit will control the levels of torque the motor produces. Measurements of current, voltage and power are taken at low to high torque points to get the torque characteristics of the motor. Test Equipment:- Circuit Diagram for Synchronous Motor Test:- Block Diagram To further explain and simplify, a block diagram of the test is included below. This shows exactly how the system operates. Three Phase Supply Brake Motor DC Rotor Supply Torque Control Speed (rev/min) Ammeter, volt meter, watt meter Test Procedure The test procedure that was followed can be found in the appendix taken from the Student Guide of TecQuipment Electrical Machines FH2, refer to appendix!!!. Results Table T.2 Torque (Nm) Speed (rev/min) Output Power (W) Wattmeter Wa (W) Wattmeter Wb (W) Input Power (W) Line Current (A) Line Voltage (V) Volt-Amperes (VA) Power Factor Effieciency (p.u.) 0 1500 0 0 4 4 0.05 245 21.21762 0.1885 0 0.05 1500 7.854 0 8 8 0.05 245 21.21762 0.377 0.981748 0.1 1500 15.71 0 10 10 0.05 245 21.21762 0.4713 1.570796 0.2 1500 31.42 10 12 22 0.05 245 21.21762 1.0369 1.427997 0.3 1500 47.12 20 20 40 0.1 245 42.43524 0.9426 1.178097 0.4 1500 62.83 30 30 60 0.15 245 63.65287 0.9426 1.047198 0.5 1500 78.54 38 39 77 0.2 245 84.87049 0.9073 1.019998 0.6 1500 94.25 50 46 96 0.25 245 106.0881 0.9049 0.981748 0.7 1500 110 55 52 107 0.25 245 106.0881 1.0086 1.027624 0.8 1500 125.7 60 65 125 0.3 245 127.3057 0.9819 1.00531 0.9 1500 141.4 70 72 142 0.35 245 148.5234 0.9561 0.995575 1 1.1 1.2 1.3 1.4 The values for output power, volt-amperes, input power, power factor and efficiency are calculated using the following relationships:- Graphical Analysis:- The report now includes graphical representation of the results table T.2; the guide graphs from the TecQuipment the machine manufacture have been included to compare result reliability. Output Power vs. Torque The above shows the relationship between torque and output power, it can be seen that as the torque produced increases so does the output power. This outcome is expected because the motor has to turn a greater load and remain at a constant speed. 8Manufactures graph of Output Power versus Torque (Synchronous Motor) The manufactures graph also shows the output power increasing with the torque. Line Current versus Torque The line current in this graph is taking an upwards trend indicating as the torque produced is increased so does the line current. The motor is working harder to produce more torque and therefore putting more load on the line. 9Manufactures graph of Line current versus Torque (Synchronous Motor) The manufactures graph shows a smoothing increase in line current against torque but does compare with the results gained from the test. Power Factor versus Torque The power factor in this graph is shown to increase to a level above 0.8 very quickly and stays there till the end of the test (0.9Nm). Synchronous motors normally run at a very good power factor close to unity, and this is represented in the results from the test. 10Manufactures graph of Power Factor versus Torque (Synchronous Motor) The manufactures guide graph shows a similar trend to that of the report authors. Efficiency vs. Torque The above graph showing the relationship of torque and efficiency shows a really good level of efficiency produced by the motor, but the trend is not very reliable as it would not be expected to go past 1. Synchronous motors do have good efficiency higher than that of induction motors. 11Manufactures graph of Efficiency versus Torque (Synchronous Motor) The manufactures graph shows a much more reliable trend of efficiency of the synchronous motor, but it does still show that the motor is very efficient. Conclusion The results for this test could have been better and if the test was to be repeated then more effort would be made to get better measurements. Although with this in mind the graphs do show what is expected from a synchronous motor in terms of torque characteristics. In comparison to the induction motor, the synchronous motor has improved characteristics of:- Less load in terms of current on the line. Better Power factor (closer to unity) Better Efficiency It would be interesting to find out the difference in starting torque capacity of the two motors because the induction motor would be expected to have a greater starting torque than the synchronous, based on the research into the operation of these two types of motor. AC Capacitor Start Induction Motor Test The most common AC induction motor in use today is probably the single phase induction motor. The reasons for this are that they require little maintenance, and are the least expensive. In the single phase AC induction motor the stator magnetic field does not rotate, it simply alternates polarity as a result of the AC voltage changing polarity. Through magnetic induction a voltage is induced in the rotor, however this alone will not cause the motor to turn. This is why starting methods are needed for single phase AC induction motors. Capacitor Start In this type of induction motor the stator is made up of a main winding and a starting winding. The starting winding is connected in series with a capacitor, which offers between the two windings a phase difference of 90 degrees. The result when the motor is started is that between the two windings a rotating magnetic field is created and is enough to start the motor. Once nearly full speed occurs then a speed sensitive switch cuts out the starting winding and the motor runs as a single phase motor. In this way of starting the starting winding is not designed to give the motor high starting torque and so only small motors can use this system. Test The purpose of this test was to find the torque-speed characteristics of an AC induction motor. The characteristics that will be analysed against torque are:- Speed Current Output Power Power Factor Efficiency The basic idea behind the test, the motor is run at full speed and is connected to a brake unit. The brake unit can be adjusted to make the motor produce more or less amounts of torque. Starting at low motor torque, readings of current voltage and power are taken, then readings continue to be taken all they way to near stalling point. Test Equipment:- Circuit Diagram for Synchronous Motor Test:- Block Diagram To further explain and simplify, a block diagram of the test is included below. This shows exactly how the system operates. Brake Motor Three Phase Supply Torque Control Speed (rev/min) Ammeter, volt meter, watt meter Test Procedure An extensive test procedure can be found in the appendix taken from the Student Guide of TecQuipment Electrical Machines FH2 refer to appendix !!!. Results Table T.3 Torque (Nm) Speed (rev/min) Output Power (W) Input Power (W) Supply Current (A) Line Voltage (V) Volt-Amperes (VA) Power Factor Effieciency (p.u.) 0.1 1450 15.18 250 1.7 245 416.5 0.6 0.0607375 0.2 1450 30.37 290 1.75 245 428.75 0.676 0.1047198 0.3 1450 45.55 310 1.8 245 441 0.703 0.1469455 0.4 1448 60.65 330 1.81 245 443.45 0.744 0.183799 0.5 1425 74.61 355 1.9 245 465.5 0.763 0.210177 0.6 1400 87.96 390 1.97 245 482.65 0.808 0.2255502 0.7 1390 101.9 421 2.05 245 502.25 0.838 0.2420245 0.8 1350 113.1 470 2.2 245 539 0.872 0.2406326 0.9 1 1.1 1.2 1.3 1.4 1.5 The values for output power, volt-amperes, input power, power factor and efficiency were calculated using the following relationships:- Problems:- Before the results are expressed in graphical form and commented on, the report discusses any problems that occurred during the lab experiment. Only one major issue occurred during the induction motor test. The fault was due to a wiring error. A link was missing on one of the watt meters which caused the motor to single phase and not rotate. It was easy to see that it was single phasing because the current measured for one of the phases was zero, indicating an open circuit somewhere. The link was quickly replaced and the test could begin. Graphical Analysis:- Now the report illustrates the results in the table T.1 in a graphical form, to make comparison the results from the test equipment manufacture have been included as a guide. Speed vs. Torque Supply Current versus Torque Power Factor versus Torque Efficiency vs. Torque Conclusion Overall the results acquired through practical experiment show encouraging results, both towards theory and also towards the manufactures guide results. Some of the graphs could have been a more steady result but it is not possible to get perfect results on something like this without doing the test many more times and taking average values. The trends do illustrate what is expected, so this means the equipment was set up correctly, and the test was carried out uniformly to manufactures guidelines. DC Motor Test The working principle behind any DC motor is the attraction and repulsion of magnets. The simplest motors use electromagnets on a shaft, with permanent magnets in the case of the motor that attract and repel the electromagnets. The reason for using electromagnets is so that it is possible to flip their magnetic field (their north and south poles). So the electromagnet is attracted to one of the permanent magnets. As soon as it reaches the permanent magnet, its north and south poles flip so that it is repelled from that magnet and attracted to the other permanent magnet. This video shows you the parts and how they fit together: Test The purpose of this test was to find the torque-speed characteristics of an AC induction motor. The characteristics that will be analysed against torque are:- Speed Current Efficiency The basic idea behind the test, the motor is run at full speed and is connected to a brake unit. The brake unit can be adjusted to make the motor produce more or less amounts of torque. Starting at low motor torque, readings of current voltage and power are taken, then readings continue to be taken all they way to near stalling point. Test Equipment:- Circuit Diagram for DC Motor Test:- Block Diagram To further explain and simplify, a block diagram of the test is included below. This shows exactly how the system operates. Brake Motor Three Phase Supply Torque Control Speed (rev/min) Ammeter, volt meter, watt meter Test Procedure An extensive test procedure can be found in the appendix taken from the Student Guide of TecQuipment Electrical Machines FH2 refer to appendix !!!. Results Table T.4 Torque (Nm) Speed (rev/min) Voltage (V) Current (A) Input Power (W) Output Power (W) Efficiency (p.u.) 0.05 4600 104 0.55 57.2 24.085544 0.421075938 0.1 3900 104 0.65 67.6 40.840704 0.604152433 0.15 3200 104 0.75 78 50.265482 0.644429262 0.2 2800 104 0.9 93.6 58.643063 0.626528449 0.25 2600 104 1 104 68.067841 0.654498469 0.3 2300 104 1.15 119.6 72.256631 0.604152433 0.35 2100 104 1.2 124.8 76.96902 0.616738942 0.4 1900 104 1.35 140.4 79.587014 0.566859073 0.45 1800 104 1.5 156 84.823002 0.54373719 0.5 1600 104 1.6 166.4 83.775804 0.503460361 0.55 1500 104 1.7 176.8 86.393798 0.488652703 0.6 1400 104 1.85 192.4 87.964594 0.457196436 0.65 1300 104 1.9 197.6 88.488193 0.447814742 0.7 1250 104 2.1 218.4 91.629786 0.419550301 0.75 1200 104 2.15 223.6 94.24778 0.421501698 The values for output power, volt-amperes, input power, power factor and efficiency were calculated using the following relationships:- Problems:- Before the results are expressed in graphical form and commented on, the report discusses any problems that occurred during the lab experiment. Only one maj

Racism and Prejudice Essay -- Racial Relations, Carl N. Degler

Racism and prejudice against African Americans in the United States can be found many years before the institution of slavery was legally defined in any state or federal law. Historical documents reveal that almost a half a century before slavery delineated by law, racism against colored people was apparent. Although some modern historians may argue that racism was a result of the clear-cut slavery codes, according to author Carl N. Degler, â€Å"if one examines the early history of slavery in the English colonies and the reaction of Englishmen toward black people, it becomes evident that the assumption slavery is responsible for the low social status of Negros is open to question† (29). Slavery did not precede racism. Rather, legal slavery helped discrimination against African-Americans perpetuate and flourish from the 17th to the 19th century. In fact, racism and fear of the norm is a commonly found behavior in history. For instance, Irishmen in the colonies were referred to as â€Å"beyond the Pale† or even â€Å"slaves† (30). The famous poet and playwright Shakespeare even referred to the African prince â€Å"Othello† as a â€Å"thing† (31). The Africans were of a different culture and considered an inferior race for these differences. They were destined to be slaves due to the prevalent prejudice such as being labeled â€Å"savages† in Africa. As early as 1620, â€Å"Virginia and Maryland records†¦ rarely refer to ‘slaves’ but mainly speak of ‘Negroes’† (31). The label â€Å"Negros† is in no way a positive term. Discrimination was widespread in law codes throughout the world before the establishment of slavery as well. In Bermuda, â€Å"the Assembly of Bermuda passed an act restraining ‘the insolencies of the Negroes’† (32). Notice the word â€Å"insolencies†,... ...s well as the hatred of blacks. White southerners, both rich and poor, looked down upon Africans as the inferior race. Both felt the cerebral status as higher beings, especially the poor, who would be the lowest of all classes in the southern hierarchy if slavery never existed. One backcountry farmer addressed his fellow southerners, asking, â€Å"How’d you like to hev [have] a nigger steppin’ up to your darter [daughter]† (182-183). Recorded commentary such as this demonstrated the common fear of the black-man. Slavery played a key role not only in the economy, but in society as well. Racist ideals along with the psychological effect of being â€Å"above† another class led to the defense of slavery by both the rich and poor alike. Works Cited Degler, Carl N. Neither Black Nor White: Slavery and Race Relations in Brazil and the United States . New York, 1971 .

Good and Evil in Tess of the dUrbervilles Essay -- Tess of the dUrbe

Good and Evil in Tess of the d'Urbervilles Though the central action of Tomas Hardy's novel "Tess of the d'Urbervilles" centres on Tess, the other characters are not lacking in interest and individuality. Undoubtedly, Tess's life is marked by two contradictory temperaments, those of the sensual Alec d'Urberville and the intellectual Angel Clare. Both characters are described with artistic detail to show a blend of weakness and strength governed by fate. Both are flesh and symbol complementing the other in the fall and rise, rise and fall again of Tess herself, and both play crucial roles in shaping her destiny. Although Alec is the evil man in Tess's life, he has some good qualities, coming trough us more as a man than Angel does. Alec is tall with a dark complexion, crude red lips and black moustache. There are touches of barbarism in his contour as well as a singular force in his face. Alec feels sexually attracted to Tess from the very beginning and showing to be straightforward with regard to what he wants and how to achieve it, he will do anything to take her. Finally, his dark instincts reveal and taking advantage of Tess's youth and innocence, he seduces her. Although we cannot forgive him for raping Tess, we have to recognise that he is not a complete villain. What he shows is a combination of desire to master her again and a genuine regard for her welfare. He is troubled for his sight of her agonizing labor at Flintcomb Ash, he reacts against society for its cruel treatment of Tess's family and he offers to help her in a variety of ways. Nevertheless, Alec is angry at her ingratitu de and very often taunts her about her missing husband, until in the end Tess kills him. The other man in Tess's life is Angel Clar... ...d on a number of levels: Alec abuses Tess in the flesh but Angel in the spirit; Alec's condemnation of Tess's husband finds its equivalent in Angel's unspoken condemnation of Tess's seducer. Alec returns, Angel doesn't until too late; Alec is in Tess's mind her real husband, while Angel who marries her is not and does not consummate the marriage, at least not, until too late. Consequently, it seems to be certain that neither Alec is completely bad nor Angel completely good. In both Hardy is presenting male dominance, with the resulting reduction of the woman in both, the flesh and the spirit. On one side Angel seems to be a better man than Alec but on the other, it is Angel rather than Alec who destroys Tess with his rejection. In conclusion, although different, both men help her and both contribute to her ruin. In relation to both, Tess is in each case a victim.

Surrealism and Salvador Dali Essay -- Art Artists

Surrealism and Salvador Dali   Ã‚  Ã‚  Ã‚  Ã‚  Surrealism is defined as an art style developed in the 1920's in Europe, characterized by using the subconscious as a source of creativity to liberate pictorial subjects and ideas. Surrealist paintings often depict unexpected or irrational objects in an atmosphere or fantasy , creating a dreamlike scenario ( www.progressiveart.com 2004). The word Surrealism was created in 1917 by the writer Guillaune Apollinaire. He used it to describe two instances of artistic innovation ( Bradley 6). In 1924, in the Manifeste du Surrealisme which launched the surrealist movement, the writer Andre Brenton and his friend Philippe Soupault adopted the word,â€Å"baptized by the name of Surrealism the new mode of expression which we had at our disposal and which we wished to pass on to our friends.† Brenton adopted the word Surrealism to describe the   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   2 literary and artistic practice of himself and his â€Å"friends.† Some examples of Surrealist art are; M.C. Escher’s â€Å"Drawing Hands,† Salvador Dali’s â€Å"The Persistence of Memory,† (1931) , and Salvador Dali’s â€Å"Remorse.† (1931)   Ã‚  Ã‚  Ã‚  Ã‚  One of Dali’s more famous paintings, â€Å"The Persistence of Memory,† was first shown June 1931 at The Pierre Cole Gallery in Paris. Essentially the soft watches demonstrate that one aspect of the paranoiac critical method is it’s capacity to link objects to qualities normally associated with other, completely different , elements .Dali painted the setting first, a deserted landscape at Port Lligat where he and Gala had bought a fisherman’s hut the previous summer. in the foreground the self-portrait motif reappears in the form of a foetus abandoned on a beach. This refers to Dali’s professed memories of intrauterine life and suggests the trauma of birth. A watch sagging across the foetus and another hanging from a plinth evoke the feelings of timelessness associated with the experience or pre- birth. The title of the painting thus refers to prenatal memories and it’s subject is â€Å"the horrible traumatism of birth by which we are expunged from paradise†. The title   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   3 also refers to Gala’s response when Dali asked her whether in three years ti... ....salvadordalimuseum.org/ All material displayed or broadcasted from this website are under strict copyright regulations.  © Copyright 2002 - The Salvador Dalà ­ Museum - All Rights Reserved. http://www.artchive.com/artchive/D/dali.html Text from "ART20, The Thames and Hudson Multimedia Dictionary of Modern Art.† Grolier Encyclopedia of Knowledge Grolier Inc. Danbury Connecticut, 1993 . issue #18. Grolier Encyclopedia of Knowledge Grolier Inc. Danbury Connecticut, 1993 . vol. 1 issue #5. Etherington-Smith, Meredith The Persistence of Memory: A Biography of Dali. N.Y. , Da Capo Press, 1995.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   13 Andrews, Wayne The Surrealist Parade N.Y. , New Directions Publishing Corp. , 1988.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Bradley, Fiona Surrealism Cambridge university Press. United Kingdom, 1997. Waldes, Teresa Great Modern Masters Dali Harry n Abrams inc Publishers. Spain, 1994. Stich, Sildra Anxious Visions Abbeville Publishers. N.Y., 1990. WWW.NYTIMES.COM copyright 2005. WWW.ProgressiveArt.COM copyright 2005.

Climate Change in Vietnam

HCM CITY UNIVERSITY OF TECHNOLOGY (HUTECH) FACULTY OF ENVIRONMENT & BIOTECHNOLOGY HUMAN AND ENVIRONMENT CLIMATE CHANGE CONTENTS I. CLIMATE CHANGE I. 1. Greenhouse gas emission I. 2. Manifestation of climate change in Vietnam II. IMPACT OF CLIMATE CHANGE ON THE ENVIRONMENT AND SOCIO-ECONOMY II. 1. Impacts on ecosystems II. 2. Impacts on the economy II. 2. 1. Impacts on agriculture and aquaculture II. 2. 2. Impacts on the energy sector II. 3. Impacts on other economic sectors II. 4. Impacts on society I. CLIMATE CHANGE: I. 1.Greenhouse gas emission: Greenhouse gas emission (CO2, CH4, N2O) has continuously increased globally since the industrial revolution, especially due to human’s activities including the exploitation of fossils for industrial and agricultural production and transportation. Greenhouse gas accumulated over an extended period causes a greenhouse effect, which raises the global temperature. The level of greenhouse gas per person in Vietnam is lower than the worldà ¢â‚¬â„¢s average level (Table 1. ), but Vietnam is one of the countries that is most affected by climate change. Table 1. 1. Estimated greenhouse gas emmission level per person Unit:  Tons  of  CO2  equivalent/person | Year 2004| Year 2010| America *| 20| 21,6| Europe *| 11| 11| The world’s average *| 5| | China *| 4| | Vietnam **| 1,5| 1,6| Source:  (*)  Climate  Change  101:  Understanding  and  Responding to  Global  Climate  Change,  2007 (**)  Estimation  in  Vietnam  Initial  National  Communication  Ã¢â‚¬â€œÃ‚  Under  the United  Nations  Framework  Convention  on  Climate  change,  MoNRE,  2003Vietnam conducted a greenhouse gas emission inventory in 1993 (The first national inventory notice, 2004), in 1998 (Greenhouse gas emmision inventory report, 2008) and in 2000 (The second national notice, 2010). The inventory result showed that the total greenhouse gas emission in 2000 was 150. 9 million tons of eq. C O2. The emission structure has changed however compared to the previous years. The proportion of emission compared to the total figure has increased in the sectors of waste, energy and industrial processes (Diagram 1. ). Diagram 1. 1. The evolution of GHG emission of each sector in 1993,1998,2000 The inventory result in 2000 showed that agriculture was the biggest source of emission with 65 million tons of eq. CO2 (accounting for 43. 1%), which was followed by the energy sector (35%). But the agricultural emission proportion compared to the total emission reduced against the previous 2 inventories. GHG emission inventory research in sectors showed that only forestry and land use restructuring were able to absorb and reduce CO2.CO2 absorption by the forests and other kinds of land coverage was 75. 74 million tons of eq. CO2, and by soil 90. 85 million tons of eq. CO2. Totally, GHG emission from agriculture and land use restructuring was 15. 1 million tons, accounting for 10% of the t otal emission. There is much scientific evidence showing that the earth is heating up due to increasing GHG emission and global climate change is taking place rapidly and with significent impact. Thus, if GHG emission continues to increase, the impacts of climate change will be more serious.Countries, that have long coastlines and are located near the equator like Vietnam will have to face great impacts from climate change. I. 2. Manifestation of climate change in Vietnam: Climate change is taking place and causing great changes, which are shown in extreme and unusual weather phenomena experienced recently such as increasing temperature, strong storm, heavy rains, floods, drought, and rising sea level etc. Temperature: Over the last 50 years (1958-2007), the annual average temperature in Vietnam increased from between 0. – 0. 7 °C. The temperature in winter rose faster than that in summer and the temperature in the north rose faster than that in the south. In 2007, the annu al average temperature in Hanoi, Ho Chi Minh City and Da Nang were higher than the average figures in 1931 to 1940 by 0. 8 -1. 3 °C and higher than that in 1991 – 2000 by 0. 4- 0. 5 °C (Source: The National Target Program to Respond to Climate Change, MONRE, 2008). Rainfall: In each region, there was no big change in the annual average rainfall in each period and in different locations.However the annual rainfall reduced in the Northern climatic zones and increased in the Southern climatic zones. The national average rainfall over the last 50 years (1958 – 2007) reduced by 2%. However, rainfall pattern within the year changed with a negative trend: increasing in the rainy season and reducing in the dry season. Cold air: The number of cold spells that affected Vietnam reduced remarkably over the past 2 decades. However, unusual manifestation appeared more regularly.The latest one was a chilly cold spells that lasted for 30 days in January and February in 2008 in the Northern region. (Source: The National Target Program to Respond to Climate Change, MONRE, 2008). Storm: In the recent past 5 to 6 decades, the frequency of tropical cyclones on the East sea increased by 0. 4 storm per decade; the frequency of tropical cyclones affected Vietnam increased by 0. 2 storm per decade; in recent years, high intensity storms appeared more regularly. The storm’s orbit trended southward and the stormy season ended later. Many storms travelled unusually and irregularly. Source: Vietnam’s second notice to the UN Convention Frame work on Climate Change, MONRE, 2010). Sea level: Monitoring data at Marine Observatories along Vietnam’s coastline showed that the average rise in sea level was 3mm/year (from 1993 – 2008) equivalent to the world’s average rate of increase. Over the last 50 years, sea level at Hon Dau marine observatory rose by 20cm (Source: The National Target Program to Respond to Climate Change, MONRE, 2008). II. IMPACT OF CLIMATE CHANGE ON THE ENVIRONMENT AND SOCIO-ECONOMY Climate change is one of the biggest challenges for human beings in the 21st century.Climate change will cause serious impacts on production, life and environment globally. Increasing temperature and rising sea level causing flooding together with saline water sources that negatively affects agriculture will increase industrial risks and negatively impact future socio-economic systems. II. 1. Impacts on ecosystems: Sea water rise, more high-intensity natural disasters, sediment levels and saline level increases all have impacts on natural ecosystems. Rising sea level accelerates the landslide rate in the coastal areas and river mouths.It leads to the disappearance of mangrove forest such as the mangrove forest east of the Ca Mau cape, which is the natural habitat of many species. Rising sea level also floods the coastal areas, which has an impact on the growth of mangrove trees, especially those that are able to retain si lt banks and thus raise the level of the coastal areas, such as Avicennia, Sonneratia alba. Due to the impacts of climate change, natural forest ecosystems such as the dry dipterocarp forests, verdurous forests and deciduous forests have all reduced in acreage.The boundary of primeval forests and secondary forests can also change as a result. The dry dipterocarp forests will expand to the north; deciduous forests of drought tolerant plants will grow more strongly. High temperature can also lead to the extinction of some kinds of fauna and flora. Some kinds of plants such as aloe wood, textured wood and siadora Vietnamese, etc, can become extinct. Hundreds of animal species and plants have to change their habitats and life spans to adapt to climate change. II. 2. Impacts on the economy:Climate change has sizably impacts on some economic sectors, which indirectly put pressure on the environment II. 2. 1. Impacts on agriculture and aquaculture: Rising sea water and salt water intrusion in the Mekong River Delta and some areas in the Red River Delta, which are major agricultural hubs, threatens agricultural production and national food security. Salinity of 1†° has intruded landward by 50-60 km and salinity 4†° (harmful to plants) has intruded by 30-40 km from the river mouth. Source: The Southern Institute of Water Resources Research, 2008). The Mekong River Delta, which has 1,77 million ha of saline land, accounting for 45% of the total area, would be the most affected in the country. If sea level rises 30 cm, salinity of major branches of the Mekong River Delta would intrude by a further 10km. ESTIMATED IMPACTS OF CLIMATE CHANGE TO VIETNAM According  to  the  climate  change  scenerio,  if  sea  water rises  by  1m,  the  Mekong  river  Delta  will  be  40%  flooded land,  Ã‚  Red  Ã‚  river  Ã‚  Delta,  Ã‚  11%,  Ã‚  and  Ã‚  Ho  Ã‚  Chi  Ã‚  Minh  Ã‚  City,  Ã‚  over 20%.Nearly  10-12%  ofà ‚  national  population  will  be  directly affected  and  the  loss  of  Vietnam’s  GDP  is  estimated  at  10%. Source:  Vietnam  Insitute  of  Meterology  Hydrometeorology and  Environment,  MONRE,  2010 ESTIMATED IMPACTS OF CLIMATE CHANGE TO VIETNAM According  to  the  climate  change  scenerio,  if  sea  water rises  by  1m,  the  Mekong  river  Delta  will  be  40%  flooded land,  Ã‚  Red  Ã‚  river  Ã‚  Delta,  Ã‚  11%,  Ã‚  and  Ã‚  Ho  Ã‚  Chi  Ã‚  Minh  Ã‚  City,  Ã‚  over 20%. Nearly  10-12%  of  national  population  will  be  directly affected  and  the  loss  of  Vietnam’s  GDP  is  estimated  at  10%. Source:  Vietnam  Insitute  of  Meterology  Hydrometeorology and  Environment,  MONRE,  2010Increasing temperature would have impacts on productivity, increase the risk of diseases and change the plant structu re, which would cause food insecurity. Scientists have said that if the temperature increases 1 °C, it will affect 25% of productivity, such as rice at 10%, corn 5-20%, (would be 60% if the temperature rises 4 °C). The boundary of tropical plants will change toward higher mountain areas and northward. Increasing temperature affects the metabolism, growth rate, reproduction and seasonal crops of aquatic creatures, which are also prone to get diseases and be more exposed to toxic chemicals.Tropical fish (of low commercial value excluding tuna) would increase, while sub-tropical fish (high commercial value) would reduce. The oxygen content in water reduces sharply at night, which makes many kinds of shrimp and fish die or be stunted. II. 2. 2. Impacts on the energy sector: When the temperature increases, energy consumption of some production sectors and domestic consumption also increases as they use more electrical devices: fans, air-conditioners, industrial cooling systems, etc, as well as pumping water for plants.A study by the Energy Institute, the Ministry of Industry and Trade shows that when the temperature in summer rises 1 °C, additional electricity charged from 9 am to 4pm increases higher than in other hours by 2. 2%/year, meaning electricity consumption would increase by 1%, especially in domestic, commercial and service sectors. When the temperature increases, the thermal cycle output of steam turbines reduces, which wastes fuel. When the temperature increases 1 °C, coal consumption of a 300 MW coal-fired thermal power plant would increase 0. 5%, equivalent to 4,500 tons/year.For a gas-turbine power plant, when the temperature increase 1 °C, generating capacity will reduce the productivity of a 250 MW gas-turbine by 0. 5%, which loses 7. 5 million kWh annually. Unusual storms and floods and rising sea level would also negatively affect the electricity operation, transmission and distribution systems, oil rigs, oil and gas pipelines to the m ainland, and oil up-loading to storage tanks. Besides, due to unusual heavy storms, reservoirs of hydro-power stations could not effectively regulate water which increase risks to the lowland area.Rains and storms would cause landslides and destroy dykes and hydropower system, which would impact the environment on a large scale. II. 3. Impacts on other economic sectors: Storms, heavy rains and floods which increase in intensity and frequency, would damage and destroy infrastructure and facilities and damage the natural and social environment seriously, sometimes even to the extent where it is unable to recover. Rising sea level would make some beaches disappear, while others would adjust by shifting landward.It would affect cultural and historical sites, natural reserves and eco-tourism sites. Increasing temperature and shorter time of low temperature would reduce the attraction of mountain resorts, while the tourist season at the coast would last longer. (Source: Climate change imp acts on Vietnam). Construction and industrial clusters/zones built in the plains would face higher risks of flooding and difficulties in rainfall drainage as well as flooding caused by rising river and sea levels.Extreme weather conditions and natural disaster increase would reduce the durability of materials, devices, facilities and infrastructure. II. 4. Impacts on society: Climate change has direct and indirect influences on society and the community’s health. Unusual climate manifestation, prolonged cold and hot spells, increasing or reducing temperature have negative influences on people’s health.Climate change also cause epidemics and other sources of diseases to occur and spread more widely such as type A influenza H1N1 virus, type A influenza H5N1 virus, diarrhoea, cholera, and other kinds of tropical diseases such as malaria, dengue fever, Japanese encephalitis, dermatological diseases, sore eyes and poisoning. CLIMATE CHANGE INCREASES THE NUMBER OF DISEASE IN FECTED PEOPLE If  Ã‚  the  Ã‚  global  Ã‚  temperature  Ã‚  increases  Ã‚  from  Ã‚  between 3  Ã‚  Ã¢â‚¬â€œÃ‚  Ã‚  5 °C,  Ã‚  around  Ã‚  50  Ã‚  to  Ã‚  80  Ã‚  million  Ã‚  people  Ã‚  worldwide will  face  the  risk  of  getting  malaria  every  year. Source: Report  of  Action  Aid). Official  statistics  of  a  WHO  survey  in  2000  showed that  Ã‚  global  Ã‚  warming  Ã‚  was  Ã‚  the  Ã‚  cause  Ã‚  of  Ã‚  an  Ã‚  additional 155,000  Ã‚  deaths  Ã‚  in  Ã‚  low-income  Ã‚  countries,  Ã‚  due  Ã‚  to  Ã‚  its impact  on  food  productivity  and  malnutrition,  diseases such  as  diarrhoea,  malaria  and  flood  related  incidents. 85%  of  the  deaths  were  under-5  children  in  low  income countries. Source:  Asia  Ã¢â‚¬â€œÃ‚  Europe  conference  on  Ã¢â‚¬Å"Sharing  experience  on responding  to  global  clima te  change  and  emerging  diseases, Hanoi,  2009CLIMATE CHANGE INCREASES THE NUMBER OF DISEASE INFECTED PEOPLE If  Ã‚  the  Ã‚  global  Ã‚  temperature  Ã‚  increases  Ã‚  from  Ã‚  between 3  Ã‚  Ã¢â‚¬â€œÃ‚  Ã‚  5 °C,  Ã‚  around  Ã‚  50  Ã‚  to  Ã‚  80  Ã‚  million  Ã‚  people  Ã‚  worldwide will  face  the  risk  of  getting  malaria  every  year. (Source: Report  of  Action  Aid). Official  statistics  of  a  WHO  survey  in  2000  showed that  Ã‚  global  Ã‚  warming  Ã‚  was  Ã‚  the  Ã‚  cause  Ã‚  of  Ã‚  an  Ã‚  additional 155,000  Ã‚  deaths  Ã‚  in  Ã‚  low-income  Ã‚  countries,  Ã‚  due  Ã‚  to  Ã‚  its impact  on  food  productivity  and  malnutrition,  diseases such  as  diarrhoea,  malaria  and  flood  related  incidents. 85%  of  the  deaths  were  under-5  children  in  low  income countries.Source:  Asia  Ã¢â‚ ¬â€œÃ‚  Europe  conference  on  Ã¢â‚¬Å"Sharing  experience  on responding  to  global  climate  change  and  emerging  diseases, Hanoi,  2009 Being aware of the climate change impacts, Vietnam’s Government has joined and ratified the UN Convention on Climate Change and Kyoto Protocol. After 2 years of implementation of the National Target Program on Climate Change Response, Vietnam has achieved initial noteworthy results. Ministries, sectors and localities have been preparing their Action Plans to respond to Climate change based on the premise of the National Action Plan.

Hrm Ulrichs Model Essay

?Briefly describe the major features you would expect to find in an HR function which has adopted the Ulrich Model as the basis for its structure. The HR model as defined by Ulrich (1997) states that HR function should be: 1. Strategic Partners: Sit at the managerial table and contribute to the organisations strategy and alignment of HR strategy. Communicates efficiently with line management. Understands the business environment and drives key business processes and activities2. Change Agents: Support, facilitate and initiate change,act as a stabilising force for employees in times of change 3. Employee Champions: Takes action to protect the interests and well being of the employees and ensuring they are the voice of the employee. 4. Administrative Experts: Ensures polices and procedures are up to date, they are legally compliant and have the ability to deliver innovative HR practices in HR recruitment, employee development and communication In the 1990’s Dave Ulrich moved to the three legged stool model for the organisation of the HR Function, this provided – Centres of excellence This is a HR unit or an outsourced facility that provides HR services to a number of parties within the organisation. HR experts provide high level advice and solutions on key services and hr activities such as training and development, recruitment, reward and employee relations. Strategic Business Partners Senior HR Managers work closely with business leaders and line managers to contribute to the overall organisations strategy and align with HR strategy. They understand the business environment and drive key business processes and activities. HRM are expected to be creative Shared Services centres Large organisations provide a centralised HR function which deliver routine HR administration such as payroll, recruitment administration or absence monitoring.