Ethylene Oxide (EtO)

Questions: 1. Define the characteristics of ethylene oxide2. Define the characteristics of ethylene oxide covering toxicological effects and physiologic effects3. Discuss the OSHA exposure standards, personal protection equipments and correct sampling process for ethylene oxide. Answers: Introduction Ethylene Oxide (EtO) is a colorless, flammable gas that smells like ether at toxic levels. EtO is workable gas for many industrial and commercial purposes as intermediate, fumigant and sterilant of medical equipments. However, with potential utility characteristics, this gas also persist potential hazardous characteristics. As employees working in medical premises it is important to get knowledge on these characteristics of EtO as well as the process to minimise its hazardous outcomes of EtO sterilisation machine (Reichert Young, 1997, p.34). As a safety officer, Mr. Roy Whittaker has constructed this short description of essential data or information that employees at Blackheath Community Hospital need to know regarding new Ethylene Oxide Sterilization Machine to be installed in the organization. 1. Defining the characteristics of ethylene oxide The following are some of the most important characteristics of EtO sterilisation machine that every employee should know: - The EtO exposure rate is limited to a part of the million air parts and is measured as TWA that is 8-hour time-weighted average. The short-term exposure limit for EtO is 5 ppm for average sampling time of 15 minutes that is known as permissible exposure limits (PELs) The action level is calculated as per 8-hour TWA for employee exposure as threshold limit as per these standards. The OSHA standards provide knowledge on EtO occupational exposure, handling of materials containing EtO and processing protocol (Ackert-Burr, 2010, p. 285). 2. Defining the characteristics of ethylene oxide covering toxicological effects and physiologic effects Physiological effects The mild effects of EtO include irritation in eyes, skin, dermal and respiratory tract. Anaphylaxis Type-1 and Contact dermatitis Type -4 along with occupational asthma is commonly observed in people with EtO exposure. The common disease resulting due to the toxicology of EtO includes blurred eye, blisters, dizziness, nausea, vomiting, headache, and convulsions. The reproductive effects of EtO involve risk conditions in pregnancy as well as chances of abortion in women (Arnold et al. 2011). The neurological effects of ethylene oxide involve a major effect on the central nervous system. These are reports indicating the development of axonal degeneration as well as defects in the myelin sheath of the brain due to EtO exposure 1300mg. Genetic effects of gas involve an increase in chromosomal materials like chromatin material, lymphocytes and micronuclei. Breakage in genetic material DNA can also occur due to EtO exposure. EtO is also capable of generating carcinogenic effect giving birth to different cancers like leukaemia, Stomach, pancreases, haematopoietic, brain cancer etc. (Lewis et al. 2003). Toxicological effects Ethylene oxide causes toxicity by inhalation above the TWA limits leading to irritation in mucous membranes of throat and nose. EtO toxicology is known as acute poisoning. A bit higher toxicity of EtO can lead to trachea and bronchi damages as well as partial lung collapse. The occurrence of pulmonary oedema and cardiovascular damages are observed in the case of long-term ethylene oxide exposure of minimum 72 hours (Toxicological profile for ethylene oxide, 2016). 3. Discussing the OSHA exposure standards, personal protection equipments and correct sampling process for ethylene oxide OSHA exposure standards The following are OSHA exposure standards for employee collected from (OSHA factsheet, 2016). As discussed above the TWA level of ethylene oxide exposure the activities like air monitoring, medical examinations, training and labelling should be completed within this threshold time limit. The employees cannot release airborne EtO concentrations at of above the mentioned action level under normal circumstances If the employee exceeds the PEL level to ethylene oxide exposure than they should follow the required actions to avoid risk. Use of work practice and engineering controls mentioned in OSHA standards are recommended to control the exposure of ethylene oxide. The personal, area and leak monitoring are keen requirements to be performed for EtO exposure Employees should follow the written compliance program developed to reduce exposure risk of EtO Establish a specific area that allows Eto exposure above the threshold limit time that is named as leak area restricted for specific use Employee should strictly follow personal monitoring protocol as per OSHA standards to tackle this exposure The medical surveillance program is mentioned as keen requirement to be established in the organization to monitor employee exposure and risk Try to maintain employee rotation as per 8-hour TWA exposure limit time Provide warning labels on equipments or containers that cause high EtO exposure Select, maintain and provide personal protection equipments for the personal safety of the employee. Maintain initial and periodic monitoring of employee on regular basis to detect exposure rate Additional monitoring should be processed for any change in workplace conditions Medical surveillance compulsory for employee assigned in high exposure area and emergency EtO exposure above TWA level Maintain material safety data sheet as per OSHA hazard communication standards Maintain employee medical record and EtO exposure record for 30 days Provide medical aid and doctor facility for emergency conditions Do not allow drink, smoke or feeding in EtO zone (Small business guide for Ethylene oxide, 2016). Personal protection equipments The personal protective equipments (PPE) as per OSHA standards for getting protection from EtO are described below: - For eye and face protection the use of safety spectacles, goggles, laser safety goggles and face shields while handling EtO exposures. For body protection from EtO, the clotting material made from rubber, neoprene, plastics and rubberized fabrics provides protection from ethylene oxide. For the protection of respiratory system, the use of positive-pressure supplied air OSHA recommends equipment for employees dealing with EtO exposure. The use of full-face respirator is highly recommended by OSHA Keep first aid for personal protection during long-term EtO exposure (OSHA factsheet, 2016) Sampling process as per OSHA standards The sampling process as per OSHA standards for collecting EtO involves the use of charcoal tubes and sampling pumps that are followed by gas chromatography analysis. The process starts by desorbing charcoal tubes in 1% CS(2) benzene. Further, the sample is derivatized with hydrogen bromide or carbon disulphide followed by sodium carbonate treatment. The below provided are specific requirements of the sampling process. Air volume- 1 litre Sampling rate 0.05Lpm Detection limit based on mentioned air volume 13.3 ppb Estimate of Standard error 6.59 % Reliable quantitation limit 52.2 ppb Special requirements The provided sample should be analysed within 15 days of sampling date. This sampling process is convenient, sensitive and reproducible to allow proper analysis of Ethylene oxide. The reanalysis of this sample is also recommended and possible as per OSHA standards. The longer GC retention time reduces interferences in this sampling process of Ethylene oxide (Sampling and analytical methods for ethylene oxide (Non-mandatory) - 1910.1047 App D, 2016) Brief training program This training program for the employees will include a training session to demonstrate the process and techniques that employee need to follow regarding the handling of ethylene oxide machinery followed by a demonstration on OSHA standards and guidelines. After this employee will be provided with a training session regarding the management and protection techniques for using sterilisation machinery. The medical record of all the employees will be recorded for further processes after the training session. References Books Reichert, M., Young, J. H. (1997).Sterilization technology for the health care facility. Jones Bartlett Learning. Journals Ackert-Burr, C. (2010). Low-Temperature Sterilization: Are You In the Know?.Perioperative Nursing Clinics,5(3), 281-290. Arnold, E. V., Doletski, B. G., Dunn, T. M., Raulli, R. E., Mueller, E. P., Benedek, K. R., Murville, M. L. (2011).U.S. Patent No. 8,017,074. Washington, DC: U.S. Patent and Trademark Office. Lewis, M., Meek, M. E., Liteplo, R. G., World Health Organization. (2003). Ethylene oxide. OSHA factsheet. (2016). Retrieved 13 July 2016, from https://www.osha.gov/OshDoc/data_General_Facts/ethylene-oxide-factsheet.pdf Sampling and analytical methods for ethylene oxide (Non-mandatory) - 1910.1047 App D. (2016). Osha.gov. Retrieved 13 July 2016, from https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDSp_id=10074 Small business guide for Ethylene oxide. (2016). Retrieved 13 July 2016, from https://www.osha.gov/Publications/ethylene-oxide.pdf Toxicological profile for ethylene oxide. (2016). Retrieved 13 July 2016, from https://www.atsdr.cdc.gov/TOXPROFILES/TP137.PDF

The factors affecting tensile strength Essay Example

The factors affecting tensile strength Paper I am comparing four sets of data. My data will be categorical. There is a simple statistical test which looks at the difference between observed and expected values and relates them to a probability level, thus making it possible to identify how likely it is that the values are significantly different. This test is called the Chi squared test. Precautions to ensure reliability   We are assuming ethnic background does not affect our results. It will not cause a massive variation in our conclusion.   All hair samples must be taken from 16-18 year old females. 6 different samples must be taken for each colour of hair. Make sure all equipment is set up; ensuring the strand of hair is fastened to the shown equipment correctly. (Figure 5). * Each hair is tested five times, so I am repeating the experiment, to make my results reliable and more accurate. Results (My own (raw data) results will be highlighted in dark red on tables 2, 3, 4 5). (The letter B is used in my results to show where the hair broke). Investigating the factors affecting tensile strength of human hair Analysing: (Skill C) Calculations Strength is determined by the amount of stress a hair can withstand without breaking. To work out the strength of each hair I calculated the stress applied to each when breaking. To do all the calculations I used the following formulas: 1  I calculated my values to do the statistical test. Discussion Melanin molecules are proteins, which are produced at the root of each hair. The more melanin in your hair, the darker it will get. An amino acid called tyrosine is converted into melanin so the hair will have colour. First, the bodys blood vessels carry tyrosine to the bottom of each hair follicle. Then, in this melanin factory tyrosine is used as the raw material for the production of the natural melanin that is the colour in hair. We will write a custom essay sample on The factors affecting tensile strength specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on The factors affecting tensile strength specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on The factors affecting tensile strength specifically for you FOR ONLY $16.38 $13.9/page Hire Writer In short, natural hair colour depends upon the presence, amount and distribution of melanin, a natural pigment found in the cortex. All natural hair colours are created from two types of melanin. Eumelanin = black pigment Pheomelanin = red/yellow pigment Mixed melanins = when both eumelanin and pheomelanin mix together inside one melanin granule. The natural colour of the hair is decided by: a) What type of melanin is in the hair b) How much melanin is in the hair c) How closely packed or scattered the melanin is within the cortex. The type of melanin and the size of the granules determine whether hair will be brown, blonde, ginger or black. The amount of melanin and its distribution determine how dark or light the hair colour will be. Black hair is created from granules full of eumelanin densely packed in the hairs cortex. Brown hair, depending on its cool or warm tones and its darkness or lightness, is created either from granules filled with eumelanin and more sparsely distributed along the cortex than those of black hair, or granules filled with a blend of mixed melanins. The red/yellow pheomelanin is believed to cause the warm, golden, or auburn tones found in most brown hair. Blonde hair has a very low melanin content. And while scientists have not yet determined which is dominant, it is believed that eumelanin creates blonde hair. Melanin in blonde hair is so sparse that what we actually see is the colour of the hair fibre itself, keratin, which is a pale yellow, off-white shade. Granules filled with pheomelanin create Ginger hair. The pheomelanin in ginger hair is less densely packed in its granules. Its shape is somewhat more irregular than its black counterpart, eumelanin. It is slightly rounder and more spread out. From my results I found out that brown hair needed the greatest amount of force to break. Blonde hair needed the least amount of force to break. Black hair was second strongest and ginger hair was third strongest. The order of strength (from my results) of hair is as follows: Brown, Black, Ginger, and then Blonde. Brown hair stretched the most before breaking. Blonde hair stretched the least before breaking. Black hair stretched the second furthest and ginger hair stretched the third furthest. The order of length of hair stretched (from my results) before breaking is as follows: Brown, Black, Ginger, and then Blonde. Brown hair experienced the highest strain before breaking and blonde hair experienced the lowest strain before breaking. The order of strain experienced by hair (from my results) before breaking is as follows: Brown, Black, Ginger, and then Blonde. Brown hair experienced the highest tensile stress value before breaking and blonde experienced the lowest tensile stress value before breaking. The order of tensile stress experienced by hair (from my results) before breaking is as follows: Brown, Ginger, Black, and then Blonde. Graph 1 shows the average force required to break the four colours of hair. From this graph I can see that brown hair required the greatest force to break. Black hair also required a large amount of force to break and so did ginger hair. Black hair only required a small amount of more force to break then ginger hair. The breaking force required for brown, black and ginger hair was quite similar. Blonde hair required much less force to break compared to the other colours of hair. This proves that the disulphide bonds in the blonde hair are not a big advantage for strength of the hair. The darker the hair the stronger the force required for the bonds in the hair to break. The darker the hair the more resistant it is to breaking when forces are applied. The darker the hair the higher concentrations of melanin present along the hair cortex. The same sort of pattern is seen in graphs 2, 3, 4 and 5. Graphs 2, 3, 4 and 5 show the extension of hair when masses are added. Blonde hair breaks the earliest and brown hair breaks the latest. Graph 2 shows brown hair. Brown hair requires about 120g to extend up to about 70mm before breaking. The graph follows a basic trend and there are no anomalous results. All results fit the line of best fit. Graph 3 shows blonde hair. Blonde hair requires about 80g to extend up to about 35mm before breaking. The graph follows the basic trend and most results fit the line of best fit. There is one anomaly, though. The extension should not increase and then decrease. It should keep on decreasing. There must have been an error in recording this result. The results in graphs 2, 3, 4 and 5 are all averages. To work out the blonde values in table 32, the results in tables 12, 13, 14, 15, 16 and 17 were used. There was only one value for the extension at 80g, in table 15. This value was smaller than the average of all the extensions in all six tables. This sample of hair should have broken at 80g not 90g. This did not happen. This may have been an error in not measuring correctly. Graph 4 shows ginger hair. Ginger hair requires about 100g to extend up to about 60mm before breaking. The graph follows the basic trend until it gets to 55g point. From this point onwards the hair length increases and decreases dramatically. This should not happen. The reason why this happens is described above with the blonde hair. It is an error in measuring. Graph 5 shows black hair. Black hair requires about 140g to extend up to about 65mm before breaking. This graph is perfect. There are no anomalies. All points meet the line of best fit accurately. Graph 6 shows the average stresses and strains experienced by each hair colour. All four hair colours are plotted on the same graph so they can be easily compared against each other. Brown, blonde and ginger hairs do not follow the normal trend. The stresses and strains for these three should continue to increase. Tables 57, 58, 59 and 60 show where the stress and strain values came form. The results are like this because when the stress and strain values were calculated the average extensions were used, which had a few faults, as describe above. Graphs 7, 8, 9 and 10 show clearly what is happening to the stress-strain curves. Graph 7 shows one anomalous result. It has a high stress and strain value. Graph 8 also shows only one anomalous result. These two graphs show the basic trend. Graph 9 shows the normal trend until the stress value gets to 150Nm-2. Then it decreases and goes back on itself. This should not happen. The reason for this is explained above. There is an error in the extension averages. Graph 10 shows no anomalies. Graphs 11, 12, 13 and 14 show modified values for stress and strain in all colours of hair. Graph 11 shows the modified stresses and strains for brown hair. This graph does not bend backwards and the stress and strain values do not decrease. Graph 12 shows the modified stresses and strains for blonde hair. This graph does not show values of stress and strain decreasing. Graph 13 shows the modified stresses and strains for ginger hair. This graph has changed a lot. It reads much clearer. Stress and strain increases throughout. This is exactly what the graph should look like. Graph 14 is the same as graph 10. It did not need any modifications. The toughness of a hair is measured of its resistance to break. A lot of energy is required to break a tough material. Finally, the strength of a material (or tensile strength) is the greatest tensile stress it can undergo before breaking. Hair is an elastic material; it can stretch to a certain maximum point (elastic point) before breaking. The largest tensile stress that can be applied to a material before it breaks is known as its ultimate tensile stress (UTS). This value is sometimes referred to as the materials breaking stress. Graph 7 shows the stress-strain points for brown hair. Graph 11 shows a modified version of this. The UTS for brown hair is 359. 03. Graph 8 shows stress-strain points for blonde hair. Graph 12 shows a modified version of this. The UTS for blonde hair is 125. 48. Graph 9 shows the stress-strain for ginger hair. Graph 13 shows a modified version of this. The UTS for ginger hair is 286. 58. Graph 10 shows the stress-strain points for black hair. Graph 14 shows a modified version of this. The UTS for black hair is 158. 31. Overall I can see that brown hair was the strongest. This was not expected. I expected black hair to have the highest tensile strength, as it had a higher density of melanin along the cortex. Blonde hair turned out to be the one with the lowest tensile stress. Ginger haired people have a high density of the pheomelanin pigments in their hair fibre. Those who produce virtually no eumelanin have a red to orange colour depending on the density of the pigment in the hair fibre. Red haired people who have a greater relative proportion of eumelanin production have a deeper red to red brown colour. Ginger hair also should have a high tensile strength. This is what I saw in my results. Black hair should also have a high tensile strength. My results showed black hair to have high tensile strength but not the highest. There are other ways in which hair tensile strength could have been measured. Hair products like shampoos have an effect on hair tensile strength. They are now designed to change hair strengths. Different makes of hair shampoos could be used. Strength could be measured in a similar way to how I measured it. A control will be also be needed, with hair with no products added. These modifications in Graphs 11, 12, 13 and 14 show what the stress strain graphs should look like. In Graphs 7, 8, 9 and 10 the lines should not bend backwards. Statistical Test I will be using the (Chi squared test) X2. The formula for the Chi squared test is as follows: X2 = ? [(O E) 2 /E] O = Observed value E = Expected value The ((O E) 2) part of the formula considers the size of the difference between the observed and expected values. This difference could be either positive or negative. To avoid the mathematical problems associated with negative values, the difference is squared. The (E) part of the formula relates the size of the difference to the magnitude of the numbers involved. The sigma (? ) sum symbol is required because there is not just one pair of observed and expected values, but several (in this case four). By taking all the observed values of stress from tables 57, 58, 59 and 60, I can work out the expected value for each hair colour. I can then place these values in a table and work out the value for X2, using the chi squared formula. To calculate the degrees of freedom to be used can be found as follows: Number of categories minus 1. In this case: 4 1 = 3 The critical value (taken from critical values for the Chi squared test) at 3 degrees of freedom is 7. 81 (at the 5% level). The test statistic (X2 = 94. 235) is greater than the critical value(C. V = 7. 81, at the 5% significance level). We therefore can reject the null hypothesis and state there is a significant difference between the observed a Investigating the factors affecting tensile strength of human hair Evaluating: (Skill D) Limitations The selotape holding hairs in the paperclip at the top and at the bottom could have interfered with the tertiary structure of the protein, keratin. This could have increased or decreased the bond attractions in the hair to cause the hair to have a high or low tensile stress. This would make my results unreliable. The hairs showing higher tensile stress may just be showing how sticky the selotape is and how strongly it is holding the hair structure together. This though, would affect all my results, as all hair samples had selotape on them to hold them together at the top and at the bottom. So, this limitation would affect all hairs making it a very weak limitation. My conclusion will not be affected as this limitation affects all hairs.   The time in between weights were added is another limitation. When each weight was added the hair stretched. But when there were a lot of weights on hair, the hair stretched quickly and then the length was measured. After I finished measuring the hair had slowly stretched a little bit more. So the measurement was wrong. When the next weight was added extra extension was added onto the new extension. My results were affected by this because some extensions were false making some data imprecise. Therefore, my conclusion will be invalid, because some hair samples could have broken at lower weights if I had waited for the hair to stretch, very slowly until it broke. There needed to be a time limit in which I had to record the extension of the hair, before adding the next weight to the hair. The eye piece graticule can be a limiting factor. Different people measured hair thickness and recorded it to what they felt the thickness ought to be according to the scale. It was not very clear to see how thick the hair was, as the hair was faded under the microscope at all magnifications and the outline was difficult to see. This could affect my results as the thickness of hairs was used to calculate the cross sectional area of the hairs, which was then used to calculate the tensile stress experienced by the hair. This could make my tensile stress values incorrect. My conclusion therefore could be affected; by making out that a certain coloured hair had a higher tensile stress than another coloured hair, when really it shouldnt have. This would make my conclusion unreliable.   There were different shades of hair colour, for example, there were light brown hair colours and dark brown hair colours. It was sometimes hard to distinguish between brown and blonde. This was the same for blonde hair. This would have an affect on the reliability and precision of my results making the accuracy of the strengths of different colours of colours of hair inaccurate. There should have been a certain shade of colour of hair (same amount of melanin in each brown hair) used for each colour sample. My conclusion will be imprecise because brown or blonde hair shades could cause incorrect results and make my conclusion incorrect.   The 10g mass is a limitation as the hair could break at lower masses than they actually did, for example a hair that broke at 50g could have broken at 41g, but I wouldnt know that as I only used 10g masses. So, I got false readings implying the hair is stronger than it actually is. If smaller masses were used my results would be much more accurate to make my conclusion reliable. This limitation could cause my conclusion to be invalid, causing the hairs strength and point on breaking higher or lower than it actually is. Conclusion After doing my statistical test I can reject my null hypothesis and accept my hypothesis and say that brown, blonde, ginger and black hairs differ in tensile strength. I have proved this difference in my calculations, mainly in graphs 1 and 6. From my results I can see that darker coloured has a higher tensile stress compared to lighter coloured hairs. In my hypothesis I said that lighter coloured hair would have a higher tensile strength than darker coloured hair, due to lighter coloured hair having sulphur-sulphide bonds, which are very strong. I have disproved this. Through testing all four colours of hair I can see that these strong sulphur bonds do not reflect any tensile strength qualities. Lighter coloured hair does not have an advantage over dark coloured hair when it comes to tensile strength. It mainly depends on the type of melanin the hair contains. The denser the melanin quantity is the stronger the hair.

Social Constructionism in Environmental Sociology Essays

Social Constructionism in Environmental Sociology Essays Social Constructionism in Environmental Sociology Paper Social Constructionism in Environmental Sociology Paper This construction of perceptions and meanings are what this essay is about. It is called social construction. The assay focuses more explicitly on the social construction Of environmental problems and issues. It does this by looking at examples of how and why certain societies can come to consider certain natural phenomena as environmental threats or issues, and asks the question of whether their perceptions are right or not. It focuses the concept of social constructionist and determines the relevance of it in environmental issues. It does this by looking at past findings of attempts at deconstructing the perceptions some societies have on their own identified environmental problems to be able to see if it helped with solutions to the problems. And lastly, it identifies criticism leveled against social constructionist in environmental sociology. All to support the following hypothesis: It is important to take the social construction aspect into consideration when looking at certain environmental problems to be able to identify hidden agendas when it comes to solving the perceived problems. But first, a brief definition of the social construction of environmental issues is necessary (As there are many- and some contradictory). It will serve as a foundation for building an understanding of what is going to be discussed. When something is socially constructed it then eggs the question of whether the threat or issue is in fact a real threat or issue because according to Hardballs and Holbrook a social construct is a product of social definitions, not natural, biological categories (2008: 752). Now according to Marsh, Keating, Punch and Harden (2009) the environment as a concept, is always contested and changing and he says that it means different things to different populations at different times. What the social construction of environmental issues and problems then means is that people in different populations perceive an issue on the environment differently from one another. An environmental issue for one society may not be one for another society. It is because they constructed their realities independent from each other. The independent development of perceptions allowed several dominant social constructs about the environment to emerge as separate independent realities. These realities were shaped and formed by power players in each society. The power players that shape a societys opinion in contemporary lifer and therefore its perspective on things are among others the media, activists, [and] scientists (Marsh et al, 2009). The following examples will illustrate how environmental issues may come to be instructed and considered important in one society, but not in another. When the media of a particular population informs its members about the poor condition of their local water, the water may have been of poor quality even before the media announced it, but since the announcement was made it has been added to the members environmental reality. In effect of the announcement the people may start buying bottled water, local government would start addressing the issue, they could create jobs to fight the issue, and certain entrepreneurs may see potential for business. All of which that loud not have happened if the media did not bring the knowledge of it into the societys reality. In another society, the media may be focusing on how behind they are economically rather than writing about water quality. Even though it has a quality similar to the other society, people does not worry about it because people arent aware of it. In both societies people dont get sick when drinking the Water, but the one society gave it an environmental issue label because of the media coverage it got. Another example is where scientists does research on something that is not considered dangerous to he environment, but after which it becomes an issue. It happens because scientists usually have an elite status. They are considered experts in their fields, and most people do not have the knowledge or qualified degree to grant them alternative knowledge which would enable them to disregard scientists opinions and findings. So when a scientist, based on his own interpretations and gained knowledge, in one society declare something as an environmental issue, the people generally respond with acceptance. Another example of a construct of an environmental issue is one from an article based n dingo management on an Australian island (Heathen, K. Burns G, 2007). They look at the Fraser Island Dingo Management Strategy (FIDS) to deconstruct key assumptions about management of dingoes on Fraser Island. What they found was that the FIDS were trying to prevent dingo aggression towards humans, and that the FIDS constructed the issue of the aggression as deriving from human-dingo interactions via feeding. The prevention techniques were composed of many ways to prevent that type of interaction. Despite that, the dingoes remained as they were, still hurting people. Heathen ND Burns concluded that the management should take to account a wider range of interpretations of human-dingo interactions (2007: 55). One can see the importance the social construction aspect has in shaping priorities of societies when looking at the above examples. It is clear that when a society does not have knowledge on a subject, it is as if it does not exist. And when making the knowledge freely available as the only relevant knowledge, the society can do no different than to accept what they are being told by power players. The construction can be deliberately created by power players in society. The government or managing scientists in a particular field can use their power to change perceptions of the society by publishing rational substantiations for their claims on a matter so that they can employ a policy or action that will benefit themselves or one that will contribute to solving a related problem of the matter without the society complaining about why they do it. It is clear from these examples that some constructed environmental issues are not real in terms true intentions as there are additional economic or monetary goals often hidden it the actions to solve he environmental problems identified by power players. This is where social constructionist in environmental sociology comes in. When social environmentalists look at an environmental issue they try to consider the social construction aspect in the origin of the issue. By doing this they are able to deconstruct what has led to the construction of the problem, and thus identify the hidden agendas associated with policies claimed to solve the problem. They can then ask the question: is it really an environmental problem if the social, cultural and economic spheres of human life are not actively affected by it? The question may leave policy makers with a conscious thought about their true agendas, and enables them to determine for themselves whether or not they will be addressing a true environmental issue or not. The study on Dingo management shows how social constructionist has deconstructed a social construction of an environmental issue to bring hidden agendas to the surface. The notion that nature should be managed by humans has led to the notion that humans are in charge of it. Humans feel that they can use and manipulate nature to generate income (like tourism to wildlife parks etc. , and that is where the problem in management comes in. The wellbeing of the nature and the economic capital it may generate produce a mixture of interests. One that wants to be green and one that wants to gain monetary profits. These two interests are contradictory because a monetary gain is sometimes gained at the expense of a green environmental gain. Now at the dingo management park, social constructionist showed why dingoes may be aggressive against humans. It showed that humans may not even belong there, or try to manage the dingoes because the fact is that dingoes are just a wild animal that react on instinct, and humans trying to control them could be causing the aggressive incidents. It showed that the management is actually catering for the safety of the humans at the expense of the dingoes (they kill dingoes deliberately to reduce their population). They cater for their safety because they bring in money, and the more safe they can make it for them, the more money they may receive. The hidden agendas (to generate monetary wealth) in the management and conservation of dingoes are actually letting dingoes getting killed instead Of getting conserved (Heathen, K. Cooper, G, 2007:48-55). Even Hough social constructionist in environmental sociology may bring the question of whether an issue is real or not under discussion when policies need to be made, it still remains just that -a question. It does not provide an answer. It is not possible to give an answer because by stating that an environmental issue is not this, but it is that, would be contradictory to what social construction stands for. That is, that people construct definitions on matter by the available knowledge they have. But knowledge is limited by a persons senses.

Aerobic vs. Anaerobic Processes

Aerobic vs. Anaerobic Processes All living things need a continuous supply of energy to keep their cells functioning normally and to stay healthy. Some organisms, called autotrophs, can produce their own energy using sunlight or other energy sources through processes such as ​photosynthesis. Others, like humans, need to eat food in order to produce energy. However, that is not the type of energy cells use to function. Instead, they use a molecule called adenosine triphosphate (ATP) to keep themselves going. The cells, therefore, must have a way to take the chemical energy stored in food and transform it into the ATP they need to function. The process cells undergo to make this change is called cellular respiration. Two Types of Cellular Processes Cellular respiration can be aerobic (meaning with oxygen) or anaerobic (without oxygen). Which route the cells take to create the ATP depends solely on whether or not there is enough oxygen present to undergo aerobic respiration. If there is not enough oxygen present for aerobic respiration, then some organisms will resort to using anaerobic respiration or other anaerobic processes such as fermentation. Aerobic Respiration In order to maximize the amount of ATP made in the process of cellular respiration, oxygen must be present. As eukaryotic species evolved over time, they became more complex with more organs and body parts. It became necessary for cells to be able to create as much ATP as possible to keep these new adaptations running properly. Early Earths atmosphere had very little oxygen. It wasnt until after autotrophs became abundant and released large amounts of oxygen as a byproduct of photosynthesis that aerobic respiration could evolve. The oxygen allowed each cell to produce many times more ATP than their ancient ancestors that relied on anaerobic respiration. This process happens in the cell organelle called the mitochondria. Anaerobic Processes More primitive are  the processes that many organisms undergo when not enough oxygen is present. The most commonly known anaerobic processes are known as fermentation.  Most anaerobic processes start  out the same way as aerobic respiration, but they stop  partway through the pathway because the oxygen is not available for it to finish the aerobic respiration process, or they join with another molecule that is not oxygen as the final electron acceptor. Fermentation makes many fewer ATP and also releases byproducts of either lactic acid or alcohol, in most cases. Anaerobic processes can happen in the mitochondria or in the cytoplasm of the cell. Lactic acid fermentation is the type of anaerobic process humans undergo if there is a shortage of oxygen. For example, long distance runners experience a buildup of lactic acid in their muscles because they are not taking in enough oxygen to keep up with the demand of energy needed for the exercise. The lactic acid can even cause cramping and soreness in the muscles as time goes on. Alcoholic fermentation does not happen in humans. Yeast is a good example of an organism that undergoes alcoholic fermentation. The same process that goes on in the mitochondria during lactic acid fermentation also happens in alcoholic fermentation. The only difference is that the byproduct of alcoholic fermentation is ethyl alcohol. Alcoholic fermentation is important for the beer industry. Beer makers add yeast which will undergo alcoholic fermentation to add alcohol to the brew. Wine fermentation is also similar and provides the alcohol for the wine. Which is Better? Aerobic respiration is much more efficient at making ATP than anaerobic processes like fermentation. Without oxygen, the Krebs Cycle and the Electron Transport Chain in cellular respiration get backed up and will not work any longer. This forces the cell to undergo the much less efficient fermentation. While aerobic respiration can produce up to 36 ATP, the different types of fermentation  can only have a net gain of 2 ATP. Evolution and Respiration It is thought that the most ancient type of respiration is anaerobic. Since there was little to no oxygen present when the first eukaryotic cells evolved through endosymbiosis, they could only undergo anaerobic respiration or something similar to fermentation. This was not a problem, however, since those first cells were unicellular. Producing only 2 ATP at a time was enough to keep the single cell running. As multicellular eukaryotic organisms began to appear on Earth, the larger and more complex organisms needed to produce more energy. Through natural selection, organisms with more mitochondria that could undergo aerobic respiration survived and reproduced, passing on these favorable adaptations to their offspring. The more ancient versions could no longer keep up with the demand for ATP in the more complex organism and went extinct.

Budgeting Essay Example | Topics and Well Written Essays - 2000 words

Budgeting - Essay Example The intention of this study is a budget as a financial plan expressed in terms of money that helps budget holders achieve organizational goals and objectives in an appropriate manner. In construction industry, budget helps companies in the process of financial analysis. Through budgeting, management of the organizations can know the financial position of the organization. They can know what is actually going on in terms of capital use for business activities. Budgeting helps in providing the management with the information regarding available capital, current financial position, and future expenditures of the ongoing business activities. Through efficient budgeting, the organizations can save money and related expenditures regarding various business activities. Budgets help in cutting off the extra costs and make money available for use in other financial activities.Proper planning plays an important role in the success of a construction company. Budgeting plays a very important role in this regard. Planning is the second function of budgeting. After forecasting the financial position, a company decides its future activities, such as, investment decisions, loan decisions, and buying or selling decisions. Communication is another major function of budgeting. If an organization makes some sort of financial deal with another organization, budgeting is that technique which can resolve the issue related to use of capital between the two parties. Priorities can be set between the two organizations regarding the financial issues. An effective budget would help the organizations in communicating with each other for the purpose of discussing where the money should be spent and how much money should be spent. 2.4 Motivation Budgeting plays an important role in motivating staff of the company. After analyzing the financial position of the company, managers can develop such plans for the employees that are able to improve their efficiency and motivation. For example, if a company develops effective compensation plans, it can result in favor of the company because employees like to work for a company which values their performances and provides them with the compensation and rewards that they deserve. However, development of compensation plans is directly related on the available budget of a company. If a company will have enough budgets for developing and implementing such plans, only then compensation plans can be developed which will ultimately result in motivating employees and improving their individual and group performances. 2.5 Evaluation In construction industry, evaluation of financial and other business processes plays a very important role. Budget represents the target performance which managers measure with the actual

Critcally examine the success of operation management theories ,tools Essay

Critcally examine the success of operation management theories ,tools and techniques in the uk supermarket sector - Essay Example Operations management is a science that deals with coordination of all functions of an organization. The major departments within an organization include; accounting, marketing, human resources, information technology departments and purchasing have to be well controlled. The key factors that have led to the development of operations management include; globalization, total quality management, empowerment and techonology.With the world becoming a global village, supermarkets are striving to provide services more efficiently and effectively so as to stay at the top of competition by quickly delivering their services. Operations management is a transformation process that interacts with various departments in an organization. According to Slack â€Å"Operations management helps in developing and managing the value chain process and also in supporting it through using different tools, techniques and methods in order for an organization to be in a position to achieve its goals and objectives within a specified period of time. The Total Quality Management is a holistic approach that requires that all the managers and personnel working for supermarkets to be able to handle customers in an appropriate way. The major supermarkets in the United Kingdom also have got a major challenge in ensuring that they empower all their members of staff regardless of their hierarchy in the organization so that they can take part in achieving the company’s goals and objectives. It refers to the process of organizing and controlling the activities of a business so as provide goods and services to the customers at the appropriate time and place. The major functions of any business involve finance, marketing and operations management. Some of the processes involved in the process management theory include forecasting, capacity planning, and management of inventory, quality assurance, motivation and training of the employees. The traditional objective of

Road Design Essay Example for Free

Road Design Essay Due to the fast development of many countries like Japan, there is a significant increase in number of manufactured vehicles and these vehicles may come from different prices that can be purchased by any people. But this increase had been responsible on the formation of the word traffic which means congested vehicles in the road. Traffic is the term used by many of us when experiencing jam packed vehicles where there is no or little movement of this mobile medium. Traffic happens in every street in the world even those industrialized countries. It is often observed on crunch time like seven o’clock in the mourning or five in the afternoon because these are the time of the day when people are mostly in the street to go to office, school or go to their houses (Ewing, 2001). It is not only the motorists sector that can be blame because of traffic jam because there are many factors to be considered why traffic jam occurs in the road. One factor to be tae into consideration is the road. It is self explanatory because this is where vehicles go by. For this paper, we will try to look on the road factor that can be a solution on traffic jam. Moreover, the design of road will be taken into consideration which has the main objective of lessening traffic situations. METHODOLOGY Road design will cover all the necessary procedures that will lead not only to comfortable and safe driving but also giving a solution on traffic calming (Ewing, 2001). First to tackle in this paper is the engineering factor. To construct a road, the foundation or soil must be firm enough to stand the compression stress brought by the weight of vehicles. Survey must be conducted first prior to the construction of the road to ensure strength of the foundation. If the ground is not stiff enough to stand the compact force, the road maybe damaged compromising the quality of the constructed road. If this happens, then traffic may arise because vehicles may not pass the road in a better and nicer route (TAC, 1999). The next factor that is part of the design is the materials to be used in the construction. It is very important to consider that the materials must comply with the national standards. This is to ensure the quality and safety factor of the newly constructed road. The road must be wide enough to facilitate the volume of vehicles passing a particular road. After the road has been constructed, the next part to be discussed is the road signals. These signs ease the flow of traffic because these are steps to follow for a harmonious flow of vehicles in the road. It is very important to remind the motorists that these road signs are not useful if motorist will not obey these road signs (The Korea Transport Institute, 2006). Put a board sign that specify the name of the roads and streets so that drivers can follow the directions thus minimizing confusion among the drivers. The information that are very important in a sign boards are, the name of the street, the distance from a place to another place, directions of intersections and other sign like no parking, no jaywalking and many others. The sign board are located in such a way that every driver whether the driver has big or small vehicles, see to it that it can be seen by the driver’s naked eye. It can be situated on top of a post and being hanged. Signs are also present in the road itself. These sign, that are mostly painted, guides the motorists or in somehow communicate to have a fast flow of traffic and improving the safety factor. These pavement markings must comply with the set of standards to minimize confusion on drivers (The Korea Transport Institute, 2006). Stoplights must be present in any road especially on intersections. This is to signal the vehicles from a given route to stop, go or get ready. But most traffic incidences can be observed on intersections because there are four opposing routes that goes in just one passage. One solution for this problem is the construction of a flyover that will facilitate a one pair of route. We know that there are four routes that want to pass an intersection, but in flyover, the four will be grouped into two making the four groups into two only. In this way, traffic will be minimized. And the last factor is the design of allocating different kinds of vehicles to behave in the street. There are public utility vehicle that transport public people from place to place. When loading or unloading their passengers, there must be a specific place where the driver can do these and not anywhere in the road (The Korea Transport Institute, 2006). The design of road just not only covers the physical or engineering aspect but more importantly are the laws that will favor the good flow of traffic and safety. These laws include, not allowing motorists to park their vehicles in the street. This will create a narrow road for the passage of other vehicles. There must be a strict enforcement so that motorists will obey traffic rules (TAC, 1999). ANALYSIS OF DATA After constructing the road and has the characteristics presented from the previous paragraphs, the next thing to do is to analyze the traffic condition. This is to determine whether the road achieved the main objective of this study which is to lessen traffic. For the data gathering, one must observed the road in terms of number of vehicles that was able to pass by on the road. The time of observation must include crunch time which is seven in the morning and five in the afternoon. The observation must be done everyday for one month. The data gathered must be compared to standard which determine whether traffic occur. FORMAT For the format of the result and discussion, the raw data must be presented first. In this part, some statistical analysis may be included to increase the reliability of the result of the study. The result and discussion part will include the data from the start of the study until the last day. There must be also a comparison between a road that was not constructed in accordance to the characteristics above and a road the followed all the factors above.