Greenhouse Gases as the Major Cause of Global Warming Essay

Greenhouse Gases as the Major Cause of Global Warming - Essay Example This is because humans and animals inhale oxygen and exhale carbon dioxide which is emitted into the atmosphere thus increasing the ratio. Only oxygen and nitrogen let the absorbed heat pass. Methane which is one of the GHG’s is a greater cause of global warming even than carbon dioxide because it can hold more heat even though it stays only about 10 years in the atmosphere as compared to a thousand or more of carbon dioxide. Methane is made from agricultural practices e.g. when fertilizer is produced. Over 33% of GHG’s emitted in the USA come from the production of electricity. The sun’s rays hit the earth with big amounts of radiation which reach the earth as light. A gas ability to stay in the air determines its degree of effect to the atmosphere. Carbon dioxide is the most effective among the greenhouse gases because it’s the most abundant. It has been proven that it can stay more than a thousand years taking effect in the atmosphere. Researchers have been able to predict what to come as a result of global warming. We are to expect more droughts as well as more of floods. As a result of temperatures getting high, evaporation occurs from the land and the sea (Karl 1719-23). If precipitation does not occur in these places, then drought is anticipated. There are countries and regions that their water supply comes from ice meltdowns from mountains. However, a current research on ice melting has shown that recently, ice is melting faster than it was estimated before. So in these regions, they can experience drought thus having the deficiency for water even for use. The warm weather afterwards causes some an increase in heat waves, rainfall and scary storms. The melting ice flows into seas and large water bodies. These water bodies expand when the contained water is heated thus can cause the nearby localities to be submerged by the water. Nations in the Pacific island are expected to be submerged by the waters by the en d of the century. Human beings can be termed responsible e.g. by deforestation among others are activities that increase the greenhouse effect and can be prevented or controlled by human beings.  Ã‚  

Advance Accounting Theory Essay Example | Topics and Well Written Essays - 3500 words

Advance Accounting Theory - Essay Example he traditional budgeting is the performance budgeting where the budgeting is done on the basis of the evaluation of the performance at the end of the financial year which can affect the preparation of budget since the preparation of budget at the end of the year can result in the deficiencies since under traditional budgeting the budget is prepared on the basis of the historical cost and on the basis of the past data and information and traditional budgeting is unfavourable for establishing cost and benefit relationship since the process of traditional budgeting is very complex in nature. 15 The concept of beyond budgeting have been introduced in order to overcome the deficiencies of the traditional budgeting which explains that beyond budgeting is considered as the most appropriate method of budgeting which includes responsiveness, flexibility and coordination. The concept of beyond budgeting has been introduced in order to abandon the concept of traditional budgeting since the beyond budgeting will focus on both financial as well as on non financial measures. This process of beyond budgeting is required to focus and establish standards or benchmarks and identify its competitors rather than framing or establishing its internal targets. The concept of beyond budgeting has become popular in the recent years among the various multinational companies for example a Scandinavian bank has adopted the concept of beyond budgeting which has facilitated the bank to undergo cultural change from establishing of budgets to setting of targets and the improvement in the performance th at has resulted in the cutting down of cost. Beyond budgeting has facilitated each unit to have different and separate profit centre. Therefore beyond budgeting is considered as an important budgeting that will overcome the limitations and the disadvantages of the traditional budgeting (Hope and Fraser, 2003). 16 In the light of recent trends, companies voluntarily furnish their social activities

Choosing successful industry in Saudi Arabia Assignment

Choosing successful industry in Saudi Arabia - Assignment Example The equipments extracted petroleum from within Saudi Arabia’s territory. Consequently, the Saudi Government hired employees from the other countries. The Saudi government targeted employees from countries plagued with high unemployment rates. The countries include India, and other Asian countries. As expected, huge groups of job applicants flocked into Saudi Arabia to get high paying petroleum industry jobs (Kane 2). Employees of the petroleum companies enjoy comfortable working conditions in Saudi Arabia. Saudi Arabia’s labor law article 146 and article 147 clearly requires the employer to exert extra efforts to comply with the benefits prescribed in the Saudi Arable labor law. The benefits include housing, camping, suitable healthcare facilities, and free meals. The schools are set up in order to fill the school needs of the petroleum workers and the school needs of the children. Saudi Arabia hires laborers to extract and export the Saudi Petroleum products. The oil field employees include low skilled oil labors. In addition, the Saudi Government hires engineers who will ensure smooth oil production (Kane 14). Knowledge resources. Saudi Arabia hired the expertise of engineers from other countries to help ensure smooth petroleum productions. With the expertise of the Saudi ARAMCO engineers and other labor employees, Saudi ARAMCO continues to successfully extract petroleum from within Saudi Arabia’s borders. Similarly, the expertise of the Saudi ARAMCO engineers and experienced petroleum employees contributed to the successful export of the country’s petroleum products to other countries (Wynbrandt 200). Saudi Arabia hired the petroleum research knowledge expertise of the United States firm, Standard Oil Company of California (SOCAL) to find petroleum. Consequently, the hired American company discovered oil in Saudi Arabia in 1932 in Bahrain. An entity, Iraq Petroleum Company, was formed that included

Joyce’s novel Essay Example for Free

Joyce’s novel Essay The novels Mrs. Dalloway and A Portrait of the Artist as a Young Man, written by Virginia Woolf and James Joyce respectively, are tales of persons who are challenged by the society in which they live. The roles traditionally handed down to men and women become elements of restraint for many of the characters within the stories. While convention dictates the actions that the characters should perform, the readers get the impression that the authors are in opposition to these traditions. Throughout the day spent with Mrs. Dalloway and her friends, situations arise in which characters become critical of others’ choices in a way that depicts the ideas of the narrator or author. Likewise, in the experiences of Stephen Dedalus and the other characters of Joyce’s novel, one finds that they often desire to perform actions alien to the stereotypical roles of their genders. In these novels, therefore, we find that there is no apparent desire within characters for males or females to inherit traditional gendered roles. In fact, we discover a desire to occupy a multi-gendered identity. This is important because it gestures at an identity separate from societal construction of gender. Hermione Lee relates that Virginia Woolf sought a â€Å"combination of sensibility and tenacity† in her work (xvii). This suggests a similar mixing of feminine and masculine qualities with which she imbues several of her characters in Mrs. Dalloway. Clarissa Dalloway has become a woman who ostensibly fits perfectly within the role societally configured for her gender. She is the wife of a statesman and the mother of a beautiful daughter. She throws fine parties and does the traditional female jobs of overseeing the servants, visiting the sick, and other things. Yet, Woolf appears immediately to intimate to the reader the undesirability of all this tradition to Clarissa herself, as she is seen at the outset of the novel going on an errand that should normally have been reserved for her servants. Her desire for independence is asserted in the first sentence, â€Å"Mrs. Dalloway said she would buy the flowers herself (Woolf 1). Though this rebellion is a small one and is buried in the guise of â€Å"womanly† work (going to buy flowers), the commercial aspect of it places her in the position of a business person, just as the errand frees her from the confines of the home. On this walk she thinks of Peter Walsh, a man with whom she once shared her passions for literature and freedom. Her thoughts and desires break through conventions that dictate the subservience of women. She considers marriage in a way that seems alien to its constitution, as she imbues her role in it with the type of independence that one does not usually find in the traditional view of marriage. She explains that her decision against marrying Peter was made because â€Å"In marriage a little licence, a little independence there must be between people living together day in day out in the same house; which Richard gave her, and she him† (Woolf 5). This demonstrates the extent to which she desires not to be subsumed by her husband as women often are in marriages. Continuing, she thinks, â€Å"When it came to that scene in the little garden by the fountain, she had to break with him [Peter] or they would have been destroyed, both of them ruined, she was convinced† (6). This tells what she considers her life would have been like with Peter. She seeks to add a portion of masculinity to her role by keeping something of herself and continuing to show herself to the world—a right that is usually granted without reservation to married men, but tacitly withheld from women of that time. Clarissa continues to demonstrate her inner tendencies to throw off the traditional gender role and to fulfill her political and occupational dreams. During that time in England, women’s occupations were limited to household-related chores. She considers other women who had lived non-traditional lives, and longs to have her life to live again so she could make different choices. The first of those choices would have granted her an occupation that would defy her gender. The narrator assures us that Clarissa Dalloway â€Å"would have been, like Lady Bexborough, slow and stately; rather large; interested in politics like a man; with a country house; very dignified, very sincere† (Woolf 8). The use of the phrase â€Å"like a man† is telling, in that it highlights the extent to which Mrs. Dalloway longs to be released from the confines of her sex. She wants to be endowed with the possibilities that attend a man. Also telling is her desire to be â€Å"very sincere† (8). Sincerity is not a trait that has been traditionally accorded to women, as they were encouraged to keep their thoughts to themselves (or perhaps not to have any at all). Therefore, a woman with any ideas or opinions can be considered to have been somewhat forced into insincerity by their very act of subordination to the will of their husband and in their pretence at never having anything to say beyond remarks about the running of the household. Clarissa’s urge to speak sincerely demonstrates her desire to combine traditionally masculine qualities with her feminine ones.

The Working Principle of Milling Machines

The Working Principle of Milling Machines In previous chapter, the literature review piece and objective of present work has been discussed. This chapter introduces the speculative background of response surface methodology, introduction of milling machine, cutting principal, milling cutter taxonomy, machining parameters, chip thickness formation and milling machine parameters which influence the surface roughness 2.1 BACKGROUND As an central subject in the statistical design of experiments, the Response Surface Methodology (RSM) is a collection of mathematical and statistical techniques useful for the modeling and analysis of harms in which a response of interest is influenced by several variables and the objective is to optimize this response RSM also quantifies dealings among one or more measured responses and the vital input factors. The DOE++ software was used to develop the untried plan for RSM. The same software has also used to analyze the data collected. After analyzing each response, multiple response optimization technique have performed, either by inspection of the interpretation plots, or with the graphical and arithmetic tools provided for this purpose. It has mentioned previously that RSM designs also help in quantifying the dealings between one or more measured responses and the vital input factors. In order to determine if there stay alive a relationship between the factors and the response variables investigated, the data together must be analyzed in a statistically sound manner using regression. A regression is performed in order to describe the data unruffled whereby an observed, empirical variable (response) is approximated based on a functional bond between the estimated variable, yest and one or further regress or or input variable x1, x2,†¦, xi. The least square technique is being new to fit a model equation containing the said regressors or input variables by minimizing the residual error measured by the sum of s quare deviations between the actual and the probable responses. This involves the calculation of estimates for the regression coefficients, i.e., the coefficients of the representation variables including the intercept or constant term. The calculated coefficients or the model equation need to however be tested for statistical implication. 2.2 MILLING MACHINE 2.2.1 Introduction Milling machines was first invented and developed by Eli Whitney to mass construct interchangeable musket parts. Although makeshift, these machines assisted man in maintain exactness and uniformity while duplicating parts that can not be manufactured with the use of a file. Development and improvement of the milling machine and components continuous, which resulted in the manufacturing of heavier arbors and high speed steel and carbide cutters. These components allowed the operator to remove metal more rapidly, and with more accuracy, than prior machines. Variations of milling machines were also developed to perform special milling operations. During this era, computerized machines has been developed to alleviate error and provide better. Milling are perhaps the most versatile machining operation and most of the shapes can be generated by this action. Unlike turning, shaping and drilling tools, the milling tool possesses a large number of cutting edges. Milling is the process of machining flat, curved, or asymmetrical surfaces by feeding the work piece against a rotating cutter containing a integer of cutting edges. The milling machine consists basically of a motor driven spindle, was mounts and revolves the milling cutter, and a reciprocate regulating worktable, which mounts and feeds the work piece. Milling machines are basically classified as vertical or horizontal. These machines is also classified as knee-type, ram-type, manufacturing or bed type, and planer-type. Most milling machines has self-contained exciting drive motors, coolant systems, variable spindle speeds, and power operated table feeds. Milling machines play an significant role in most machine shops, machining metals to various shapes and sizes by means of a revolving cutting tool or tools having a number of cutting edges called teeth. Such tools has known as milling cutters or mills. In order to machine numerous configurations in a milling machine, man have developed various types of milling cutters to fit the necessary requirements. Most milling cutters has made of high speed steel; some employ the utilize of carbide teeth and inserts.[20] The working principle, employed in the metal removing operation on a milling machine, is that the work has rigidly clamped on the board of the machine, or held between centers, and revolving multi-teeth cutter mounted moreover on a spindle or an arbor. The cutter revolves at a fairly high speed and the work fed leisurely past the cutter as shown in figure. The work can be fed in a vertical, longitudinal or cross direction. As the work advances, the cutter-teeth do away with the metal from the work surface to produce the desired shape. [21] Figure2.1: Working Principle of milling operation [21] 2.2.2 Milling Cutter Nomenclature Figure 2.2 shows two views of a common milling cutter with its parts and angles acknowledged. These parts and angles are common to all types of cutters in some form. The pitch refers to the angular distance between like parts on the adjoining teeth. The pitch is unwavering by the number of teeth. The tooth face is the forward facing surface of the tooth which forms the cutting edge. The cutting edge can the angle on each tooth which performs the cutting. The land is the fine surface behind the cutting edge of each tooth. The rake angle is the viewpoint formed between the face of the tooth and the centerline of the cutter. The rake angle defines the cutting edge and provides a path for chips that have cut from the work piece. The primary clearance angle is the viewpoint of the land of each tooth, measured from a line tangent to the centerline of the cutter at the cutting edge. This angle prevents every one tooth from rubbing against the work piece after it makes its cut. The secondary go-ahead angle defines the land of each tooth and provides supplementary clearance for the passage of cutting oil and the chips. Figure 2.2: The two views of a common milling cutter with its parts and angles identified. [21] The hole diameter determines the size of arbor that is essential to mount the milling cutter. A keyway was present on all arbor-swelling cutters for locking the cutter to the arbor. Plain milling cutters that has more than 3/4 inch in width can usually made with spiral or helical teeth. A plain spiral-tooth milling cutter produces a better and smoother draw to a close, and requires less power to operate. A plain helix-tooth milling harvester is especially desirable where an jagged surface or one with holes in it have to be milled. The teeth of milling cutters are either right-hand or left-hand, viewed from the back of the machine. Right-hand milling cutters cut when rotate clockwise; left-hand milling cutters cut when rotated counterclockwise. Saw Teeth: Saw teeth are whichever straight or helical in the smaller size of plain milling cutters, metal slitting saw milling cutters, and closing stages milling cutters. The cutting edge is usually given about 5 ° primary clearance angle. Sometimes the teeth have provided with offset nicks which shatter up the chips and make coarser feeds promising. Formed Teeth: Formed teeth can usually specially made for machining unbalanced surfaces or profiles. The possible varieties of formed-tooth milling cutters are more or less unlimited. Convex, concave, and corner-rounding milling nail clippers are of this type. Inserted Teeth: Inserted teeth had blade of high-speed steel inserted and rigidly held in a blank of machine steel or cast iron. unlike manufacturers bring into play different methods of holding the blades in place. Inserted teeth are more cost-effective and convenient for large-size cutters because of their reasonable initial cost and because worn or broken blades has be replaced more easily and at less price tag 2.2.2.1 Recommended Angles for Milling Cutter The angle between the face and the land of the cutter tooth is called lip angle (ÃŽ ²).Its value depends upon the values of rake and relief angles. A larger lip angle ensures a brawny tooth. As such, the endeavor should be to keep it as large as practicable. This is particularly chief while milling harder metals and when deeper cuts to be employed. Cutters having helical teeth are made to contains a helix angle between 10- (degree) and 50- (degree) the recommended values of principal angles are given in the table [19] Table 2.1: Recommended Angles for Milling Cutter [21] Material Recommend values in degree Rake angle(degree) Relief angles(degrees) H.S.S Tools Stellite Tools Cemented carbides Cast iron(Soft) 10-15 6-8 3-6 4-7 Cast iron(Hard) 10 3-6 0-3 4-7 Mild steel 10-15 3-6 0-(-5) 3-5 Aluminum alloys 20-30 10-15 10-20 10-15 Brasses and Bronzes 10-12 5 2-3 10-15 Mg.alloys 20-30 15-20 15-20 10-12 2.2.3 Machining Parameters 2.2.3.1 Selection of Speed The approximate standards given in may be used as a guide for electing the proper cutting speed. If the operator finds that the machine, the milling cutter, or the work piece cannot be handle suitably at these speeds, instantaneous readjustments shouldcan be made. If carbon steel cutters have used; the speed should be about one-partially the recommended speed in the table. If carbide-tipped cutters are used, the speed could be doubled. If a bountiful supply of cutting oil is theoretical to the milling cutter and the work piece, speeds can be increased 50 to 100 percent. For roughing cuts, a moderate speed and coarse feed often give best results; for last cuts, the best practice is to reverse these conditions, by means of a higher speed and lighter feed. The formula for manipulative spindle speed in revolutions per minute is as follows: Where, Spindle speed (in revolutions per minute). Cutting speed of milling cutter. Diameter of milling cutter (in inches) 2.2.3.2 Selection of Feed The rate of feed, or the speed at which the work piece pass the cutter, determines the time obligatory for cutting a job. In selecting the feed, there are several factors which should be well thought-out are as follows: Forces are exerted against the work piece, the cutter, and their property devices during the cutting process. The force exerted varies directly with the amount of metal unconcerned and can be regulated by the feed and the depth of cut. Therefore, the wrong amount of feed and depth of cut have interrelated, and in turn are dependent upon the rigidity and power of the machine. The feed and depth of cut also depend upon the type of milling cutter being used. For example, deep cuts or foul-mouthed feeds should not be attempted when using a small diameter end milling cutter, as such an attempt would spring or break the cutter. Coarse cutters with muscular cutting teeth can be fed at a faster rate because the chips may be washed out more without problems by the cutting oil. The feed of the milling machine may be selected in inches per minute or millimeters per minute the milling feed has determined by multiplying the chip size (chip per tooth) desired, the integer of teeth on the cutter, and the revolutions per minute of the cutter. Example: the formula used to hit upon the work feed in inches per minute Where Feed rate in inches per minute Chip pert tooth Number of teeth per minute of the milling cutter Figure 2.3 shows the path of feed during the cutting operation. It is usually regarded as standard practice to feed the work piece against the milling cutter. When the piece is fed aligned with the milling cutter, the teeth cut under any weighing machine on the work piece surface and any backlash in the feed screw is taken up by the weakness of cut. As an exception to this recommendation, it is advisable to feed with the milling cutter, when cutting off accumulation, or when milling comparatively deep or long slots. The direction of cutter rotation had related to the behavior in which the work piece is held. The cutter should rotate so that the piece springs away from the cutter; then there will be no predisposition for the force of the cut to loosen the work piece. No milling cutter should be rotated toward the rear as this will break the teeth. Never revolutionize feeds while the cutter is rotating. Figure2.3 Direction of Feed during machining operation [21] 2.2.4 Chip Formation in Milling Operation The scheme of chip formation during plain milling using a straight cutter is explained in figure 2.4. The cutter has a diameter and the depth of cut provided by. When milling is done straight-edge cutter, the operation is orthogonal and the kinematics of chip formation is shown in figure 2.4. Since all the cutting edges take part in machining, a study of the process is facilitated by considering the action of only a single tooth. If is the feed velocity of the table in mm/min, the effective feed per tooth in mm will be, where is the cutter rpm and is the number of teeth in cutter. The material removal rate per unit width of the job is given by. It is clearly seen from figure that the thickness of the uncut material in front of cutting edge increases gradually, reaching a maximum near the surface and again drops to zero quickly. If the feed velocity is small as compared with the circumferential velocity of the cutter, then Figure 2.4: Details of chip formation [22] Where is the angle included by the contact arc at the cutter center O in radians. Now, considering the triangle OAT, we have Hence, Neglecting the higher order terms in as it is normally very small. Using this value of in the expression of the maximum uncut thickness, we get It is obvious that when cutting with a straight cutter, there is no component of the cutting force along the straight cutter axis. The average uncut thickness can be taken as half of the maximum value. Thus, From the above equation show that when the depth of cut increases, the chip thickness increases so that increases the cutting resistance and the amplitude of vibrations. As a result, cutting temperature also rises. Therefore, it is expected that surface quality will deteriorate. When the feed rate increases, the chip thickness increases so that increases in cutting force and vibration. 2.3 SURFACE ROUGHNESS PARAMETERS Surface roughness is an chief factor when dealing with issues such as friction, lubrication, and wear. It also have a major impact on application involving thermal or electrical confrontation, fluid dynamics, noise and vibration control, dimensional tolerance, and abrasive processes, among others. The resultant roughness fashioned by a machining process can be thought of as the amalgamation of two independent quantities Ideal roughness: Ideal surface roughness was a function of feed and geometry of the tool. It represents the best promising finish which can be obtained for a given tool shape and feed. It can be achieved only if the built-up-edge, chatter and inaccuracies in the machine tool activities are eliminated completely. For a sharp tool without nose radius, the maximum height of disproportion is given by Rmax = f/(cot φ + cot ÃŽ ²) Here f is feed rate, φ is major cutting edge angle and ÃŽ ² is the inconsequential cutting edge angle. The surface roughness assessment is given by Ra = Rmax/4 Idealized model of surface roughness have been without a doubt shown in Figure 2. 5. Practical cutting tools was usually provided with a rounded corner, and figure shows the surface produced by such a tool under ideal conditions. It can be shown that the roughness assessment is personally related to the feed and corner radius by the following expression: Ra=0.0321 f 2/r Where, r is the corner radius. Figure 2.5: Idealized Model of Surface Roughness [20] Natural roughness: In practice, it is not usually possible to achieve environment such as those described above, and normally the natural surface roughness forms a outsized proportion of the actual roughness. One of the main factors causative to natural roughness is the occurrence of a built-up edge and vibration of the machine tool. Thus, superior the built up edge, the rougher would be the surface produced, and factors tending to reduce chip-tool friction and to eradicate or reduce the built-up edge would give improved surface finish. The Principal fundamentals of surfaces are as follows: Surface: The surface of an object is the boundary which separate that object from another substance. Its shape and extent has usually defined by a drawing or descriptive specifications. Profile: It is the form of any specified section through a surface. Roughness: It was defined as closely spaced, irregular deviations on a scale smaller than that of waviness. Roughness may be superimposed on waviness. Roughness is uttered in terms of its height, its width, and its distance on the surface along which it is precise Waviness: It is a recurrent deviation from a flat surface, much like impression on the surface of water. It is measured and described in terms of the freedom between adjacent crests of the waves (waviness width) and height between the crests and valleys of the impression (waviness height). Waviness can be caused by Deflections are tools, dies, or the work piece, Forces or temperature sufficient to cause warp, Un flush lubrication, Vibration Any intermittent mechanical or thermal variations in the system during Manufacturing operations. Flaws: Flaws, or defects, are random irregularities, such as scratches, crack, holes, depressions, seams, moan, or inclusions as shown in Figure 2.5 Lay: Lay or directionality is the direction of the predominant surface pattern and was usually noticeable to the naked eye. Lay direction have been shown in Figure 2.5 Figure 2.6 Surface Characteristics [20] 2. 3.1 Factors Affecting the Surface Finish Whenever two machined surfaces come in make contact with with one another the quality of the mating parts the stage an important role in the performance and wear of the mating parts. The height, shape, arrangement and track of these surface irregularity on the work piece depend upon a number of factors such as: The machining variables which affect the surface roughness has spiteful speed, feed and depth of cut. The factors of tool geometry which affect to achieve surface draw to a close are nose radius, rake angle, side cutting edge position, cutting edge Work piece and tool material combination and their mechanical property Quality and type of the machine tool new Auxiliary tooling, and lubricant second-hand Vibrations connecting the work piece, machine tool and cutting tool. 2.3.2 Factors Influencing Surface Roughness in Milling Machine The various factors which influence surface roughness of work piece in the milling machine are: Depth of cut: escalating the depth of cut increases the cutting resistance and the amplitude of vibrations. As a result, cutting temperature also rises. Therefore, it has expected that surface eminence will deteriorate. Feed: Experiments show that as feed rate increase surface roughness also increases due to the increase have cutting force and vibration. Cutting speed: It is found that an increase of cutting speed generally improves surface eminence. Engagement of the cutting tool: This factor acts in the same way as the distance downward of cut. Cutting tool wears: The irregularities of the cutting edge due to wear are reproduce on the machined surface. Apart from that, as tool wear increases, other dynamic phenomena such as unwarranted vibrations will occur, thus further deteriorating surface quality. 2.4 CONCLUDING REMARKS In this chapter, the working principal of milling machine is presented. The categorization of milling cutter with its parts and angles are presented. Machining parameters which affect the surface roughness, chip thickness formation and factors influence surface roughness in milling machine are also presented in this chapter.

The Effect of Childhood Trauma on Brain Development Essay -- Child Abu

According to the Center for Disease Control, one in every three girls and one in every five boys are sexually abused by an adult at some time during childhood. Child abuse is a vicious cycle. After a child is abused it puts a deterrent on his or her ability to succeed in life. Examples of this are adults who were abused as children are twice as likely to become abusers themselves. The majority of people in prisons were abused as children. It is no wonder why childhood trauma has such a horrible impact on a person’s personality and brain. Trauma is a serious consideration in special education. When a child is exposed to a traumatic event, such as abuse, neglect or death, it can have a lifelong effect on their mental health. Although there are numerous effects followed by childhood trauma the brain chemistry of neurotransmitters is most affected. First a person might ask what neurotransmitters are. A perfect example is a lock and a key. Neurotransmitters are keys and each one activates different receptors (locks). Today there is known to be sixty chemicals that play a role in transferring information throughout the brain and body, each of which differently effect thought, feeling, and behavior. During childhood is when a person is most impressionable. Therefore when a child has suffered any physical, sexual, or emotional abuse these instances play a major role on the connections to their brain and the way that person will react to any given situation. If a child was frequently abused their brain would continuously be in high stress alert. According to The Healing Center- On Line, studies on the physiological effects of trauma have found profound and substantial effects within multiple interconnected neurobiological syst... ...rth a lot of effort to secure the damaged connections of their brain. After the trauma the person could be haunted by nightmares or constantly bothered by their inability to recall the incident fully, due to the damaged hippocampus. Trauma is as an event more overwhelming than a person ordinarily would be expected to encounter. Therefore the individual would suffer more than a few effects including eternal change such as thought process, inability to learn properly, difficulty trusting people, difficulty in socializing, and basically an inability to live their life to the fullest without distraction. If someone knew a child in danger of abuse they should call 1800-4-A-child. The longer the child is traumatized the greater the effects will be on the chemistry of their brain, and the less chance they have of overcoming the damage in order to live a life of normalcy.

Could Eddie have succeeded without the help of Netta Essay

‘Mabo’ is an Austalian TV film which was released in 2012 which depicts the life of Eddie koiki Mabo utilizing narrative techniques and elements in which a typical drama consists of. Eddie Koiki Mabo is played by Jimi Bani and his wife Bonita/Netta Mabo was played by Deborah Mailman, the film was directed my Rachel Perkins and produced by BlackfellaFilms and the ABC. The principal story of Eddie’s journey from an exiled Murray islander to a justice fighter employed a conventional narrative flow, as well as a secondary narrative component of Eddie and Netta’s relationship, however do these two concepts of the film relate to one other. The story of Eddie Mabo’s success for the fight for freedom and justice was effectively shown over a 40 year time span yet is it clear that Eddie Koiki Mabo could not have succeeded without Netta? I am puzzled upon this question as there are many different facts and points that are indirectly raised during the film which are based on; the courage within Eddie himeself, Eddie and Netta’s children, and Eddie’s experiences before he met Netta. Throughout Australian history we have seen many acts of men and women fighting for the entitlements of the indigenous people however the most respected and recognized of these is Eddie Mabo whom of which stood up for the rights of his people from a very young age all the way to his death. Mabo battled for the right to own his land which he had inherited and with that came a directive to change the policies and laws of the government. One of the many ways he accomplishes these tasks and gains success is by courage. Eddie had courage from a young age which made him able to accomplish many objectives throughout his life time even before he met Netta and we see this just before he gets exiled from Murray Island. Killoran wanted Eddie to work on his green truck however Eddie has the courage to turn down this offer. â€Å"im not going to work as a slave†. However when Netta was involved in Eddie’s life we still see a lack of her support in some cases as she does not have the same will power and courage as Eddie. When Eddie first wanted to stand for his kind and make a change to the indigenous people, Netta did not support him from the beginning, ‘black causes now ive heard it all†. Nevertheless she may not have always agreed with Kioki but she always managed to stand by his side and support him in every way she could, e.g the marches. So with that we establish that it was Eddie’s courage who led him  to his victory however he did have support during the course of his journey. Even though MABO could be pictured as a film about a man and a woman who saw great injustice and tried to change it, the theme could also be a personal cost of a public campaign to a family who have inadequate financial means and only love and determination to get them through. Netta and Eddie are both hard working people who make an effort to try and get things done and through their pride and determination they are able to accomplish great things. Eddie fights for the rights and pride of his people while Netta stands by his side as well as constantly supporting the children by looking after them and working to provide food for them. Eddie was a focused and determined man and we see this throughout the film, one part was when Netta asked Eddie â€Å"what if you don’t win†, Eddie replies â€Å"DON’T YOU DARE!.† Perkins purposely put this scene it to show the dedication and resilience Eddie Mabo had in order to gain justice for his people, however Eddie would not be able to accomplish such tasks if it wasn’t for the strength and provisional care that Netta had for his children. Therefore without Netta’s assistance with the children Eddie couldn’t have been able to successfully focus on winning the court case f or the future of his children. â€Å"People that go to the mainland, they forget everything†. Benny Mabo said this to Eddie before he left Murray Island and it was because of this I think Eddie was so strongly willing to make a change for his people, to make the people from the mainland remember where they were from and to provide for these people with the same benefits as the white men. Eddie’s focus for the benefits of his kind was beyond the imagination of the people around him; even Netta â€Å"I’ll give you black causes† was what Netta said when Eddie was explaining about the rights for their people. Eddie’s plan from the beginning, before he met Netta was to make a change, when he was asked to work on Killorian’s green truck and he refused, and it was obvious enough that it was his experiences, with his dad, that encouraged him to have such a mentality. Evidently enough when Eddie was trying to go back to see his dad we see Netta in the cubical looking upon Eddie as he was frustrated because he was unable to see his dad. This idea of Eddie being alone symbolized that he must accomplish his objectives alone, â€Å"IM going to make history†(dining room scene), as he began his journey alone and stood alone at the pier when wanting to go back to Murray Island. Eddie’s idea of change originated from  the teachings of his father, as we see the constant flashbacks throughout the film, not because of the involvement with Netta. Rachel Perkins successfully show the story of Eddie Mabo’s success for the fight for freedom and justice was effectively shown over a 40 year time span yet is it clear that Eddie Koiki Mabo could not have succeeded without Netta? This question is highly acceptable upon both sides and views of the argument, based on; the courage within Eddie himeself, Eddie and Netta’s children, and Eddie’s experiences before he met Netta.