Anxiety Among Alcoholics and Non-Alcoholics Essay Example for Free

Anxiety Among Alcoholics and Non-Alcoholics Essay Abstract Alcohol is one of the most widely used drug substances in the world. For many people, drinking alcohol is nothing more than a pleasant way to relax. People with alcohol use disorders, however, drink to excess, endangering both themselves and others. In the mental health area alcoholism is caused mostly by depression, anxiety and stress, on the other hand it also leads to depression and stress. The present study aims to compare depression and anxiety among alcoholics and non- alcoholics. It was assumed that depression and anxiety may be the risk factors for alcoholism. A sample of 100 people (50 alcoholics and 50 non-alcoholics) was randomly selected from Delhi. Beck Depression Inventory (BDI) and Beck Anxiety Inventory (BAI) were used to collect data on depression and anxiety. t-test was administered to compare two groups. The result of the study showed that alcoholic group was higher on depression as well as anxiety than the non alcoholic group, and it was also found that there is no clear cut casual relationship between alcoholism and depression and anxiety. Alcoholism is perhaps most strongly associated with antisocial personality disorder and drug abuse, but its relationship to other forms of psychopathology has become increasingly evident. In particular, investigations of alcoholic samples indicate a strong co-occurrence of alcoholism with diverse form of anxiety and depressive disorder (Barbor et al, 1992; Chambless et al, 1987; Hasegawa 1991; keller 1994; Nunes, Quitkin Berman, 1988; Penick, 1994; Schuckit, Irwin Brown, 1990). ______________________________________________________________________ *Associate professor, Deptt. Of Psychology, Aligarh Muslim University, Aligarh **Research scholar, Aligarh Muslim University, Aligarh. According to Nijhawan (1972) Anxiety, one of the most pervasive psychological phenomenons of the modern era refers to a â€Å"persistent distressing psychological state arising from an inner conflict†. Depression can be defined as â€Å"a state of mind, or more specifically, a mental disorder, characterized by lowering of the individual’s vitality, his mood, his desires, hopes, aspirations and of his self-esteem. It may range from no more than a mild feeling of tiredness and sadness to the most profound state of apathy with complete, psychotic disregard for reality.† (Mendelssohn, 1963). Alcoholism can lead people into serious trouble, and can be physically and mentally destructive. Currently alcohol use is involved in half of all crimes, murders, accidental deaths, and suicides. There are also many health problems associated with alcohol use such as brain damage, cancer, heart disease, diseases of the liver, depression anxiety and other mental disorders. Results from community surveys and epidemiologic samples indicate that substantial comorbidity also exists for depression, anxiety and alcoholism in the general population (Regier et al, 1990; Helzer Pryzbeck, 1988; Kendler et al, 1995). The high co-occurrence of these syndromes, therefore, represents a significant clinical and public health issue that is likely to affect a substantial proportion of the general population. Although the comorbidity of alcoholism with anxiety and depressive disorders has been extensively documented in both clinical and epidemiologic investigations, the specific mechanisms underlying these associations remain a source of debate. One widely accepted hypothesis is that these forms of comorbidity reflect a causal relationship of alcoholism with anxiety and depression. Support for a causal association is based partly on observations that alcohol is commonly used to self- medicate symptoms of negative affect, and so, alcoholism often develops as a secondary diagnosis to anxiety and depression (Meyer Kranzler,1990; Hesselbrock, Meyer Keener,1985; Lader,1972; Merikangas et al,1985). The 18-month follow-up of participants of the Psychiatric Morbidity among Adults Living in Private Households, 2000 survey (Singleton Lewis, 2003) provides an opportunity to determine whether excessive alcohol consumption and abnormal patterns of use are risk factors for incident anxiety and depression in the general population. The study also examined the reverse relationship, considering whether anxiety and depression are risk factors for the development of abnormal patterns of alcohol consumption. However, evidence for a causal relationship is not unidirectional as alcoholism is often observed as a primary disorder, and the presence of problem drinking itself may generate severe anxiety or depressive syndromes (Mendelson Mello, 1979, Nathan, OBrien Lowenstein, 1971; Schuckit, Irwin Smith, 1994; Stockwell, Hodgson Rankin, 1982). Heavy alcohol consumption has been implicated in the development of anxiety and depression (Schuckit, 1983). Many cross-sectional studies have identified considerable comorbidity between anxiety and depression, and alcohol abuse. For example, data from four large community based epidemiological studies (n422 000) in Europe and the USA consistently demonstrated a two- to threefold increase in the lifetime prevalence of anxiety and depression in those with DSM–III or DSM–III–R alcohol abuse or dependence (Swendsen et al, 1998). If anxiety disorders and alcoholism are casually related, there should be a high rate of alcoholism among patients being treated for anxiety disorders. Two studies (Torgersen, 1986; Cloninger et al, 1981) of the prevalence of alcoholism in patients being treated for anxiety neurosis were identified. These investigations suggest a lifetime population prevalence of alcohol abuse/dependence of approximately 14%. The survey of the relevant literature made it quite obvious that much of the studies show a prevalence of depression and anxiety among alcoholics. However, previous studies have also pointed out the possibility of alcoholism as risk factors for depression and anxiety. At the same time, literature does not provide any clear cut direction towards the casual relationship between alcoholism and depression and anxiety. Thus, despite the strong association of alcoholism with anxiety and depressive disorders, no universal consensus has been reached regarding the specific mechanisms underlying these associations. The present study aims to identify depression and anxiety among alcoholic and non-alcoholic peoples. Method: Sample: sample of the present study consisted of 100 subjects (50 alcoholics and 50 non alcoholics). The alcoholics were identified through survey from different living areas (including rural, urban and semi-urban) of Delhi and 50 alcoholics were randomly selected for the study. In the same way the non-alcoholic subjects were also selected randomly from different parts of Delhi. The age range of the subjects was between 25 to 50 years. Tools: â€Å"Beck Depression Inventory† BDI -2nd was designed by Beck, Steer Brown (1996). This self report scale has shown to document levels of depression. BDI -2nd edition contains 21 items, each answer being scored on a scale value of 0 to 3. The cut offs used are 0-13 Minimal depression; 14-19 Mild depression; 20-28 Moderate depression; and 29-63 Severe Depression. Higher total scorer indicates more severe depression symptoms. â€Å"Beck Anxiety Inventory† was designed Beck, Epstein, Brown, Steer (1988). This self report scale has shown to document levels of Anxiety symptoms in a valid and consistent manner. BAI contains 21 items each answer being scored on a scale value of 0 to 3. Each symptom item has four possible answer choices: not at all (assigned value =o); Mildly (it did not bother me much) (assigned value=1); Moderately (it was unpleasant but I could stand it) (assigned value =2); and Severely (I could barely stand it) (assigned value =3). The values for each item are summed together to yield an overall or score for all 21 symptoms that can range between 0 and 63 points. A total score of 0-7 is interpreted as a minimal level of Anxiety, 8-15 as ‘mild’, 16-25 as ‘moderate’ and 26-63 as ‘severe’. The BAI is psychometrically sound. Interval consistency ÃŽ ± =.92 to.94, for adults and test-retest (one week interval) reliability is .75. Procedure: The test for depression and anxiety were administered on the subjects individually after establishing the rapport with them. Each and every item was explained to the subject, and then he was asked to respond truly for the item. Thus data was collected for depression and anxiety from alcoholic and non-alcoholic people. t-test was applied to find out the significance of difference between the Mean scores of different groups. Results: TABLE-1 Showing comparison of Mean for depression and anxiety scores between the alcoholics and non-alcoholics Variables| Groups| N| Mean| Std.deviation| t | df| P| depression| Alcoholic Nonalcoholic| 50 50| 35.7600 17.1000| 10.17913 6.15530| 11.092| 98| .01*| Anxiety| Alcoholicnonalcoholic| 50 50| 38.0800 18.3200| 11.55261 6.18570| 10.662| 98| .01*| *Significant at .01 level of confidence TABLE-1 further shows the results obtained by the comparison of alcoholics and non alcoholic group for depression and anxiety. The obtained results show that the mean depression score (M=35.7600) for alcoholic people is higher than the mean depression score (M=17.1000) for non alcoholic people, and the difference between the two means (t=11.092) is statistically significant at .01 level of confidence. Consequently it reveals the findings that alcoholic people have higher depression than the non-alcoholics. The TABLE-1 also shows the results of the comparison of alcoholic and non-alcoholic people on anxiety. The mean anxiety scores (M=38.0800) of alcoholics is found very much higher than the mean anxiety scores (M=18.3200) of the non-alcoholics and the two means difference (t=10.662) is statistically significant at .01 level of confidence. It indicates that alcoholic people have higher anxiety than the non-alcoholic people. Discussion: The basis of the above results may safely be concluded that the alcoholics are highly depressed and extremely anxious than the non-alcoholic people. However, the high prevalence of these anxiety and depressives’ symptoms does not necessarily mean that these alcoholic individuals will demonstrate the long term course or require the long term treatments associated with DSM-III-R major depressive and anxiety disorders. The temporal nature of the association between Depression Anxiety and alcohol is difficult to determine from studies, which uncertainty arising as to whether alcohol is a risk factor or a form of self –medication. The finding of the present study support the findings of Hartka et al, (1991) that reported a significant correlation between baseline consumption of alcohol and depression at follow-up based on data from eight longitudinal studies. However, in this analysis control of confounders was limited to age, gender and interval between measurements. Overall, our findings are contradictory with those of Wang Patten (2001) who observed no excess morbidity among those who drank daily, those who drank in binges (more than five drinks), those who had more than one drink daily, and among drinkers in general. Alcohol dependence was not considered. Similarly, in a randomly selected community cohort with follow-up at 3 and 7 years, Moscato et al (1997) found no excess incidence of depressive symptoms among those with ‘alcohol problems’ (defined as a DSM–IV diagnosis of alcohol dependence or abuse or drinking more than five drinks a day on one or more occasions per week). It may safely be concluded on the bases of previous literature and result of the present study that there is no clear cut casual relationship between depressive and anxiety disorder and alcoholism. In the similar way our findings of the study show that the alcoholics are more depressive and anxious than the non alcoholics. Though it does not show any clear cut picture either alcohol is risk factor for depression and anxiety or depression and anxiety is a risk factor for alcoholism. References Babor, T., Wolfson, A., Boivin, D., Radouco-Thomas, S., Clark, W. (1992). Alcoholism, culture, and psychopathology: A comparative study of French, French Canadian, and American alcoholics. In: Helzer, J., Canino, G. (eds): Alcoholism in North America, Europe, and Asia. New York, NY: Oxford University Press; 182-195. Beck, A.T., Epstein, N., Brown, G., Steer, R.A. (1988). â€Å"An inventory for measuring clinical anxiety: Psychometric Properties, Journal of Consulting and clinical Psychology; 56:893-897 Beck, A.T., Steer, R.A., Brown, B.K. (1996). Beck Depression Inventory 2nd Ed.). San Antonio. Tx; Psychological Corporation. Chambless, D., Cherney, J., Caputo, G., Rheinstein, B. (1987). Anxiety disorders and alcoholism: A study with inpatient alcoholics. J Anxiety Disord; 1:29-40. Cloninger, C.R., Martin, R.L., Clayton, P., Guze, S.B. (1981). A blind follow-up and family study of anxiety neurosis: preliminary analysis of the St Louis 500, in Anxiety: New Research and changing Concepts, Edited by Klein, D.F., Rabkin, J. New York, Raven Press, Hartka, E., Johnstone, B., Leino,V. (1991). A meta-analysis of depressive symptomatology and alcohol consumption over time. British Journal of Addiction; 86: 1283-1298. Hasegawa, K., Mukasa, H., Nakazawa, Y., HK., Nakamura, K. (1991). Primary and secondary depression in alcoholism-clinical features and family history. Drug Alcohol Depend; 27:275-281. Helzer, J., Pryzbeck, T. (1988). The co-occurrence of alcoholism with other psychiatric disorders in the general population and its impact on treatment. J Stud Alcohol; 49:219-224. Hesselbrock, M., Meyer, R., Keener, J. (1985). Psychopathology in hospitalized alcoholics. Arch Gen Psychiatry; 42:1050- 1055. Keller, M. (1994). Dysthymia in clinical practice: Course, outcome and impact on the community. Acta Psychiatr Scand; 383(Suppl):24-34. Kendler, K., Waiters, E., Neale, M., Kessler, R., Heath, A., Eaves, L. The structure of the genetic and environmental risk factors for six major psychiatric disorders in women. Arch Gen Psychiatry 1995; 52:374-383. Lader, M. (1972). The nature of anxiety. Br J Psychiatry; 121: 481-491. Mendelson, J., Mello, N. (1979). Medical progress: Biologic concomitants of alcoholism. N Engl J Med; 301:912-921. Mendelssohn, V.P. (1963). Depression in incyclopedia of mental health. Vol.II, Franklin Walts, Inc. Merikangas, K., Leckman, J., Prusoff, B., Pauls, D., Weissman, M. (1985). Familial transmission of depression and alcoholism. Arch Gen Psychiatry ; 42:367-372. Meyer, R., Kranzler, H. (1990). Alcohol abuse/dependence and co-morbid anxiety and depression. In: Maser J, Cloninger C (eds): Comorbidity of Mood and Anxiety Disorders. Washington, DC: American Psychiatric Press: 283-292. Moscato, B., Russell, M., Zielezny, M. (1997). Gender differences in the relation between depressive symptoms and alcohol problems: a longitudinal perspective. American Journal of Epidemiology; 146: 966-974. Nathan, P., OBrien, J., Lowenstein, L. (1971). Operant studies of chronic alcoholism: Interaction of alcohol and alcoholics. In: Roach, P., Mclssac, W., Creaven, P. (eds): Biological Aspects of Alcohol. Austin, TX: University of Texas Press;. Nijhawan, H. K. (1972). Anxiety in school children. New Delhi : Wiley Eastern Private Limited. Nunes, E., Quitkin, F., Berman, C. (1988). Panic disorder and depression in female alcoholics. Journal of Clinical Psychiatry; 49:441- 443. Penick, E., Powell, B., Nickel, E., Bingham, S., Riesenmy, K., Read, M. (1994). Comorbidity of lifetime psychiatric disorder among male alcoholic patients. Alcohol Clin Exp Res; 18:1289-1293. Regier, D., Farmer, M., Rae, D., Locke, B., Keith, S., Judd, L. (1990). Comorbidity of mental disorders with alcohol and other drug abuse: Results from the Epidemiologic Catchment Area (ECA) study. JAMA; 264:2511-2518. Schuckit, M. (1983). Alcoholic patients with secondary depression. American Journal of Psychiatry, 140: 711-714. Schuckit, M., Hesselbrock, V. (1994). Alcohol dependence and anxiety disorders: What is the relationship? Am J Psychiatry, 151:1723-1734. Schuckit, M., Irwin, M., Brown, S. (1990) .The history of anxiety symptoms among 171 primary alcoholics. J Stud Alcohol; 51:34-41. Schuckit, M., Irwin, M., Smith, T. (1994). One-year incidence rate of major depression and other psychiatric disorders in 239 alcoholic men. Addiction ; 89:441-445. Schuckit, M., Tipp, J., Bergman, M., Reich, W., Hesselbrock, V., Smith, T. (1997). Comparison of induced and independent major depressive disorder in 2,945 alcoholics. Am J Psychiatry; 154:948-957. Singleton, N. Lewis, G. (2003). Better or Worse: A Longitudinal Study of the Mental Health of Adults Living in Private Households in Great Britain. London: Stationery Office. . Stockwell, T., Hodgson, R., Rankin, H. (1982). Tension reduction and the effects of prolonged alcohol consumption. Br J Addict; 77:65-73. Stockwell, T., Smail, P., Hodgson, R., Canter, S. (1984). Alcohol dependence and phobic anxiety states. II. A retrospective study. Br J Psychiatry; 144:58-63. Swendsen, J., Merikangas, K., Canino,G. (1998). The comorbidity of alcoholism with anxiety and depressive disorders in four geographic communities. Comprehensive Psychiatry; 39:176-184. Torgersen, S. (1986). Childhood and family characteristics in panic and generalized anxiety disorders. Am J Psychiatry; 143:630-632 Wang, J. Patten, S. B. (2001). Alcohol consumption and major depression: findings from a follow-up study. Canadian Journal of Psychiatry; 46: 632-638.

Lines composed upon Westminster bridge, Sept. 3 1802 and London Essay Example for Free

Lines composed upon Westminster bridge, Sept. 3 1802 and London Essay These two poems show very different views of London. Lines composed upon Westminster Bridge, written by William Wordsworth, describes London in detail. He captures the beautified city and expresses the calmness of the morning. William Blake, who lived around the same time, wrote London which expresses the chaotic and corrupt side of London. Wordsworth describes the city in much detail. A sight so touching in its majesty. The Earth has not anything to show more fair. He expresses his true feeling about the city from where he sees it. He goes on to personify the city and describe how it doth like a garment wear The beauty of the morning; silent, bare. He has captured the city in the morning when it is quiet and in a sense almost naked with no one yet bustling through the streets, there are no fume engulfed traffic jams or shouting street salesmen. There is only the calmness of the morning. All the man made objects and buildings, such as ships, towers, domes, theatres and temples lie open unto the fields and to the sky. The man built objects remain where they were left not yet being used by Londoners. The atmosphere is sublime, the sun is just rising and soaking everything in its light, Never did sun more beautifully steep Neer saw I, never felt, a calm so deep! the scene is so peaceful he is feeling peace within himself. The natural body of the city, the river, is gliding in its own free way, the way it wants the river glideth at its own sweet will Its free will is moving it naturally through the city as though it were the countryside. The river has also been personified to give more emphasis of its freedom. He is so overwhelmed by the atmosphere and calmness of the city. Dear God! The very houses seem asleep everywhere he sees is not yet awake, again he has personified an object to give it more emphasis. His final line is describing the city as a mighty heart that is lying still. The capital, like the giant mechanism of a heart is just lying still. The aim from the poem is to describe the amazement he sees when looking over a massive city and seeing the calmness. He wants to express to others how peaceful and calm it makes him feel and pass that feeling on to the reader. The first two stanzas describe what the city is like, and what he sees around him. The sestet after this shows his personal response to what he has already described and how he feels about the city. Blake presents a much more depressing, morbid scene of London describing the corruptness of everything in the city. He is describing the attitudes and goings on in London that are normally never spoken about, the things which people may or may not know but which go on behind closed doors. A lot of repetition is used, unlike in Wordsworths poem, to give emphasis to the points which he is trying to make. In every cry, of every Man, In every Infants cry of fear, In every voice he only lists one example in each line but gives the effect of a lot of crying and pain and fear. He speaks in a first hand account throughout the poem I wander, I hear, and I meet. By speaking in the present tense it makes the reader more inclined to think it is going on here and now however old the poem may be. By beginning the first line with I wander thro each chartered street It makes it easier to visualise what he is describing because it is a first hand account. The chartered streets are each set out neatly and ordered, the chartered Thames is also very regulated and gives the impression of it being divided and bought and sold. He notices a mark in every face I meet Marks of wisdom, marks of woe. This evidence of scars of weakness and great sadness in faces contrasts with the peaceful and happy atmosphere Wordsworth gave to London. He hears mind-forgd manacles in crys of every man and Infants cry of fear he is referring to the fake, made up manacles that he cannot actually hear but knows that something is wrong. His repetition of cry continues to the next stanza where he talks of chimney-sweepers which are doing the dirty, hardest jobs and suffering for their work, an example of the depressed and morbid London. The description of the blackening church shows the soot taking over London and the church becoming almost evil, involved with dirty money or becoming corrupt. Even the church is starting to lose its faith. Another large part of London life is also criticised, the hapless soldiers sigh Runs in blood down palace walls. Fighting is going on around the palace but going unnoticed, the palace is oblivious to the corruptness going on inside its own walls. He contrasts the third stanza with the 4th final stanza, not only the church and palace and the huge industries of London are corrupt the streets are also. Thro the midnight streets I hear How the youthful harlots curse there is a lot of prostitution going on in the streets of London but was something that wasnt spoken about. The STDs, or curses blasts the new born infants tear. Implying that prostitutes pass on STDs and then these in turn get passed on to the newborn babies of those who have any disease. Another example of a corrupt system in London, which now effects the innocent. And blights with plagues the marriage hearse. Sleeping with prostitutes while married destroys the whole point of marriage and then if the partner becomes pregnant another generation is born into corruption. The use of hearse shows how marriage is carried away as though dead and not taken seriously. The extremely regular meter helps put across the ordered ways he describes the beginning. These chartered and regulated ways soon give way to the examples of how corruption is slowly taking over the whole city, the government, the church, the palace and the streets. The first poem also used a regular meter, which, also worked well in describing the city peacefully and happily. The two poems contrast greatly in not what they describe but how they describe it. Wordsworth has a much more calming poem, which in effect leaves the reader much more calm and peaceful. This is unlike Blakes who describes so much evil and chaos going on, his poem leaves the reader much more depressed and almost disgusted with how the people and industries of London are behaving. Their use of language is also quite different, Wordsworths entire poem is full of description of beauty, bright and glittering and full of splendour. He uses very grand descriptions of everything unlike the descriptions of Blake, which are quite harsh and blunt, blasts the new born infants tear, blights with plagues and runs in blood down palace walls. I did enjoy both poems but preferred the first, Lines composed upon Westminster because of its use of more soothing, happy descriptions of London. It made me feel much more relaxed after reading it whereas London left me feeling slightly more depressed and sad. Although this may have been the aim of Blakes poem I preferred Wordsworths poem because it was much calmer.

The Electromagnetic Testing: The Eddy Current Testing

The Electromagnetic Testing: The Eddy Current Testing In modern NDT methods electromagnetic testing plays an important role. Electromagnetism is a part of ndt process. It is a process based on inducing magnetic field. The process of inducing an electric current and magnetic field or both inside a test material. Then observe the magnetic flux induced in the material. This method is based on the electromagnetism. Electromagnetism is the property of a material to get magnetic effect while an electric field applied. The main factor of this test is that the material should be a conductor. These methods give more benefits and advantages than other tests. The major tests coming under the electromagnetic testing are, Eddy current testing Flux leakage testing Alternating current field testing Remote field testing Among these techniques my topics are Eddy current testing Flux leakage testing EDDY CURRENT TESTING Eddy current testing is relatively applicable in small materials. It gives good measurements on ferromagnetic materials. The basic principles of eddy current testing are electromagnetism and permeability. More details about eddy current testing is shown in the coming pages. FLUX LEAKAGE TESTING Flux leakage is another electromagnetic tesing.It is widely used. Electromagnetism is the basic principle of flux leakage testing. This method is most commonly used in pipe lines and storage tanks. After inducing magnetic field we are able to analyzing the defects through instruments. Other electromagnetic techniques are, ALTERNATING CURRENT FIELD MEASUREMENT ACFM methods are used to detect surface breaking cracks. This method can be applied to both magnetic and nonmagnetic materials.ACFM method is based on the electromagnetism and these entirely different from eddy current method.ACFM method gives us more benefit than other methods. It does not need the removal of paintings and coating.ACFM technique is more advanced testing than dye pentrant testing and magnetic particle testing. The main advantages of ACFM tastings are Able to work on coatings No need to cleaning more Does not require equipment shut down High speed inspection REMOTE FIELD SENSING METHOD RFT is the commonly used electromagnetic method in ndt. Remote field testing method also joined with eddy current testing is named as remote field eddy current testing. But in practically there are many difference shows between eddy current testing and remote field testing.RFT technique is mainly used to find out the thickness of the ferromagnetic material tube walls. Here RFT shows more sensitivity than eddy current testing. The main principle of RFT is the electromagnetism. In RFT, the probe contains transmitter zone and receiver zone. The remote field shows more coupling to the exciter coil and receiver coil. The main advantages of RFT are, High sensitivity Give accurate measurements from sheets and plates. Ability to inform internal defects Detect defects from the ferromagnetic tubes EDDY CURRENT TESTING Eddy current testing is used in a variety of industries to find defects and also measurements. Major use of eddy current testing is for defect detection when the nature of the defect is well understood. Naturally the method is used to test relatively small area and the probe design and test parameters must be established with a good understanding of the flaw that is to be detected. Eddy current testing only used to detect surface and near surface defects. In thin materials such as plates and sheets, eddy currents can be used to measure the thickness of the material. This shows eddy current is useful for detecting corrosion damage and other damage that causes a thinning of the material. The method is used to make corrosion thinning measurements on aircraft skins and in the walls of tubing used in assemblies such as heat exchangers. Eddy current method is also used to find the thickness of paints and other coatings. Eddy currents are varied with respect to the electrical conductivity and magnetic permeability of materials. So eddy current testing can be used to arrange materials and also find which heat treatment applied to the material. It is the main advantage and use of eddy current testing method. In Eddy current testing different probes or transducers are used. Compare to other testing methods eddy current testing shows many advantages and applications. Transducers used in eddy current testing is depend upon the properties and size of the material. PRINCIPLES In eddy current testing the major principles are, Electromagnetism Permeability ELECTROMAGNETISM The main principle of eddy current testing is the à ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒâ€¹Ã…“electromagnetismà ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒ ¢Ã¢â‚¬Å¾Ã‚ ¢. This states that à ¢Ãƒ ¢Ã¢â‚¬Å¡Ã‚ ¬Ãƒâ€¹Ã…“when an electron is passing through a conductor, a magnetic field induced on the conductor perpendicular to the axis. The same effect happens in a copper wire while alternating current passing through it. When the alternating current expands then the magnetic field also expands. The magnetic field obtained through electro magnetism is similar to the bar magnet. PERMEABILITY Permeability is also relating to the electromagnetism. It is also called as magnetic permeability. Permeability is ability to permeable. It is a constant of proportionality exists magnetic induction and magnetic field intensity. Permeability of some materials has been change according to the temperature changes and magnetic induction. PRINCIPLE OF EDDY CURRENT TESTING IMAGE-1 NB: COURTESY TO MARKTEC FROM MARKTCC.CO PRACTICAL METHOD Eddy current testing is used in different sectors for fin out the thickness and used to check the material losses in different materials. The cause of material loss is corrosion. It mainly used in thin sheets, plates and also in aircraft components. On the impedance plane, thickness variations exhibit on the eddy current signal response as a subsurface defect. Except that the signal represents a void of different size and depth. Due to this the phase rotation should be same and the amplitude should be greater. In the device the lift-off curves for different areas of taper wedge can be produced by nulling the probe in the air and touching it to the various surfaces at various locations of thee tapered wedge. A comma shaped curve is formed while a line is drawn between the end points of the lift-off curves. In the second stage the comma shaped curve path is traced on the screen when the probe is scanned down the length of the tapered wedge. So that the entire range of thickness values are measured. The important thing is that the depth of penetration of the eddy currents must cover the range of thickness being measured. Then a frequency is selected that produces standard depth of penetration at maximum thickness. Lower frequency is needed for getting high penetration. Due to the probe impedance is more sensitive to changes in electrical conductivity. So electrical conductivity cannot be phased out and is important to verify the conductivity of below the region of low level. If testing need more penetration single coil probe, reflection type probe and transformer probes are used based on configuration. Small diameter probe coils has the efficiencies to give very high sensitivity. EDDY CURRENT TESTING ON A BORE IMAGE-2 NB: COURTESY TO: BAM.DE TFROM BAM.DE EDDY CURRENT INSTRUMENTS In industries various eddy current instruments are used. Analog and digital display instruments are mainly used. Classification of eddy current instruments is based on the display used for presenting the data. The main display types are, Analog meter Digital readout Impedance plane Time vs. signal amplitude PROBES USED In eddy current testing a variety of probes or transducers are used. The probe classification is based on the configuration and mode of operation. The main probes are, Absolute probe Differential probes Reflection probes Hybrid probes Surface probes Bolt hole probes Bobbin probes Encircling coils WORKING OF A PROBE IMAGE-3 NB:COURTESY TO DAVISLABUS TO DAVISLABUS.COM CODES AND STANDARDS USED IN ECT BRITISH STANDARD BS 3683(PART 5) =Eddy current flaw detection glossary. BS 3889 (PART20) =Automatic eddy current testing of wrought steel tubes. BS 3889(PART213) =Eddy current testing of nonferrous tubes. BS 5411(PART3) =Eddy current method for measuring coating thickness of conductive coatings on nonmagnetic base materials. AMERICAN STANDARD ASTME 243=Eddy current testing of seamless copper and copper alloy tubes. ASTME 309=Eddy current examination of steel tubular products using magnetic saturation. ASTME 1033=Eddy current examination of type F continuously. The main advantages and disadvantages are, ADVANTAGES Ability to detect small cracks Find surface and near surface cracks High sensitivity Equipment is portable High accuracy Able to inspect on irregular shapes Economically adjustable DISADVANTAGES The material should be a conductor The Skilled and trained person needed Depth of penetration has some APPLICATIONS USES Eddy current testing is applicable in different sectors. The main applications are, Crack detection Material thickness measurement Coating thickness measurement Conductivity measurement Material identification Hest damage detection 2. ELECTROMAGNETIC FLUX LEAKAGE TESTING Magnetic flux leakage is an important method in NDT process. Magnetic flux leakage method can be used to detect the circumferential cracks on the stainless steel and metal losses in ferromagnetic materials. It is widely used in tubes and heat exchangers for find out the discontinuities. The major principle of magnetic flux leakage testing is the electromagnetism. During MFL inspection a magnetic field induced on the material. This property of material is termed as electromagnetism. MFL tools consist of two or more bodies while inspecting tubes and complicated material models. The main body is named as magnetizer with magnets and others are batteries and electronics.MFL tool is able to find sensor readings based on either the distance of tool travelled or on increment time. In flux leakage examination of tubular parts three types of defects can be detected. They are longitudinally oriented, transversely oriented, silvers. Magnetic flux leakage testing has some limitations in sizing the capacity of defects. In compare with eddy current testing magnetic flux leakage testing shows more sensitivity and advantages. In magnetic flux leakage testing method of tubular products both outside and inside diameter defects can be detected but generally they cannot be distinguished. WORKING PRINCIPLE The main principles of electromagnetic flux leakage are, ELECTROMAGNETISM The main principle of MFL is that electro magnetism. This states that when electron is passing through a material a magnetic flux induced on the conductor. The magnetic field should be perpendicular to the axis. An electromagnet is an object, which acts like a magnet and its magnetic effect created and controlled by electricity. HALL EFFECT Some Hall Effect sensors are used in electromagnetic flux leakage testing. Hall Effect is the production of a voltage difference across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. PERMEABILITY Permeability is also related to the electromagnetic field. It is the ability to become permeable. Permeability changes occur in some material with temperature changes and magnetic induction. PRACTICAL METHOD Magnetic flux leakage testing was used earlier because eddy current cannot detect subsurface defects in ferromagnetic test material. In such a situation a common technique using encircling coils but them sometimes inconvenient while using in internal coils. Flux leakage testing is used at steel mills and fuel mills for getting correct measurements without errors. When ferromagnetic material that is free from defects is magnetized, then an unbroken flux field flows through the object material. The magnetic flux flows through between its poles. Next the flux density decreases towards the outer material surfaces and a detector of flux leakage testing would pick up a very weak signal from the surfaces. However, if the surface is interrupted by a discontinuity, poles are formed at opposite sides of the resulting gap. Then the flux lines flow externally from the north to South Pole. The flux leakage lines are detected by a transducer or probe passing over the discontinuity and signal is displayed. Disturbance of the materials original flux lines also extends under the discontinuity and if the material wall is thin itself, a discontinuity on wall surface may be detected from the opposite wall. After getting the signals from the detector we have to find out the length, thickness and measurement about the defect through monitoring.MFL gives us to the ability to detect the surface and subsurface defects. FLAW DETECTION USING FLUX LEAKAGE IMAGE-4 NB: COURTESY TO FARREL.CO FROM FARREL.CO.ID CODES AND STANDARDS USED IN MFL BRITISH STANDARD BS 6072 =Magnetic particle flaw detection. BS 4489 =Automatic black light measurement. BS 5044 (PART) =Forged and stamped crank shafts. AMERICAN STANDARD ASTME 709=Magnetic particle inspection practice. ASTME 1251=Indications in ferrous castings. ASTME 570=Flux leakage examination of ferromagnetic steel tubular products ADVANTAGES OF MFL 1. Able to detect surface and subsurface defects 2. It is a simple method 3. High sensitivity 4. Easy measurement 5. No need to remove the coatings DISADVANTAGES OF MFL 1. Surface contamination not detectable. 2. Works only with ferromagnetic materials. 3. Difficult to measure deep depts. 4. Skilled and trained person needed. APPLICATIONS OF MFL 1. Bars transverse and tilted effects. 2. Tubes longitudinal defects. 3. Pressure vessels 4. Heat exchangers 5. Power plants CONCLUSION EDDY CURRENT TESTING In this project contains an explanation of eddy current testing. The main concept is the understanding of basic theories and working methods of eddy current testing. The second thing is to describe the advantages and disadvantages and also describe the applications. This method is used in different industry sectors for getting accurate measurements and to find out the discontinuities for increasing the safety and production. So eddy current testing is a method which gives good sensitivity and accurate measurements. ELECTROMAGNETIC MFLUX MLEAKAGE the performance of MFL testings.MFL testing can be carried out only in ferromagnetic materials. It can be applicable in coated and non coated ferromagnetic materials.MFL is used in the inspection of tube and piping to find unwelded areas of longitudinal joints. It also a most useful method in plate materials, storage tanks and also to find other forms of degradation In this project also describes the magnetic flux leakage testing in NDT.This study is used to understand. REFERENCE 1. GOOGLE 2. NDT.NET 3. WWW.MARKTEC.CO.JP 4. WWW.BAM.DE 5. DAVISLABS.COM 5. FARREL.CO.ID

Essay example --

â€Å"Sometimes life hits you in the head with a brick. Don't lose faith (Steve).† In other words, don’t give up your hope or goals because sometimes you will be successful due to luck. Founder of the prominent Apple Inc, Steve Jobs has led the company to success. Together with Steve Wozniak, and Ronald Wayne, they created the original, Apple Computer Inc. They contributed technological advances over the years which made devices affordable and convenient to everyone. Now, all Apple products proliferate around the world and is commonly used everywhere. Although Jobs has been through many rough times during his journey to success, his interest in technology, good decisions, innovative ideas, and persistence allowed Apple and himself to prosper. Steven Paul Jobs was born in San Francisco, California 1955 (A E Networks). His biological parents were Joanne Schieble and Abdulfattah Jandali, however Jobs was put up for adoption and as a result; Paul and Clara Jobs picked him up and raised him (A E Networks). Jobs already has a rough start on his life. He was â€Å"smart, but directionless,† but that did not stop him from finding success in his adulthood (A E Networks). Steve Jobs’ interest in technology sprouted from his childhood hometown, Santa Clara County, otherwise known as Silicon Valley (Moisescot). The County is well known for their semi conductor companies that were filled with engineers working on electronics (Moisescot). This environment set a foundation to Jobs’ path to success. During high school, Jobs attended an electronic class in which he received help from HP’s co founder, Bill Hewlett, to get electronic parts and to get help on his homework (Moisescot). Eventually, due to his interest in this tech class, he worked at the HP fac... ...n the technological world. Furthermore contributing to this world, he realized that a touch screen can be applied to a phone, thus the iPhone was born (Moisescot). Again, it turned out to be a great seller and changed how people used their phones. Steve Jobs’ was extremely successful because he changed how people viewed technology. Furthermore, he brought success and fame to Apple which before was withering. Jobs life was like a rollercoaster; He had a slow start, but then found success. He dropped back down due to the hardships and conflicts at Apple then became widely successful on the new products. Even though he was kicked to the ground several times, in the end he always rose up in success. Jobs’ interest in technology, good decisions, innovative ideas, and persistence helped him get out of the hard times in his life, but eventually he found success in the end.

Arizona SnowBowl Essay -- Snow Argumentative Persuasive Essays

Arizona SnowBowl â€Å"A typical Ski season at the Arizona Snow-Bowl last from December to Easter† (Arizona SnowBowl Upgrade proposed Action, September 2002, p.2). The Arizona Snow-Bowl, which is located in the San Francisco Peaks, seven miles outside of Flagstaff, Arizona was only open four days last year! Alarming? Yes, this is why the Arizona Snow bowl has released a full proof plan, which consists of making their own snow! Thanks to Wayne Pierce, the inventor of the snowmaking machine, Arizona Snowbowl has offered a proposal to remodel their ski resort. which includes the installation of Snow-making machines. The remodeling also includes the building of one new chair lift, the addition of new ski runs, maintenance work on three existing chair lifts, lighting for night time skiing, the creation of a half pipe, the addition of a snow play area for families, the improvement of service facilities/infrastructure, and a cultural center for native Americans. If it were not for Wayne Pierce and his great invention, the Arizona SnowBowl would not even be able to consider these improvements. The improvements would not be plausible without a consistent ski season, which a snow machine can deliver. With all the advantages that a snow machine could bring to Northern Arizona, there are some people who do not want to see the Arizona SnowBowl join the ninety-one percent of ski areas who make their own snow on National Forest land (Murray, p.3). These people have raised great controversy in Northern Arizona because they would like to see the mountain stay as pristine as possible. The only problem with their point of view is that there are more advantages than disadvantages to installing snow machines. The biggest advantage ... ...None of the renovations being made will take place outside of the Arizona SnowBowl boundaries. Also, the Arizona SnowBowl boundaries only take up â€Å"†¦.4 of one percent of the total acreage of the Peaks† (Frederick, p. 2). The only things the renovations will do are improve the ski area itself. The Arizona SnowBowl is one of the few ski resorts in the west that does not make artificial snow. If the Arizona SnowBowl were to make their own snow the positives would far exceed the negatives. The positives that would occur would be an economic increase to the Flagstaff area. Also, the customer satisfaction at the ski resort would go up significantly. The Arizona SnowBowl would not expand its boundaries, thus the peaks would not be negatively impacted. If snow could be made on the mountain Flagstaff would become a resort town and attract a wider range of snow users.

Romanticism as a Reaction to Neoclassicism :: Romanticism Essays

The time of Romanticism began in the late 18th century and ended around the mid 19th century. Just showing what the Romantic Movement is, it can be shown as a reaction against Neoclassicism. Romantic art portrays emotional, painted, or shown in a bold and dramatic manner, and there is often a stress on the past. Romantic artists often use sad themes and dramatic tragedies. Paintings by famous Romantic artists such as Gericault and Delacroix are filled with energetic brushstrokes, rich colors, and emotive subject matters. While the German landscape painter Casper David Friedrich created images of lost loneliness, and at the same time in Spain, Francisco Goya conveyed the horrors of war in his works. This shows the variety of different art works of this time period. Some of these artists were fascinated in nature, people can definitely see this if they are shown through any Romanticism museum, also the importance of drama and emotion. At this time artists made their art work portray more then what the eye sees, the artists added more symbolism to the art work then in the Renaissance. The Pre-Raphaelite movement succeeded Romanticism, and Impressionism is firmly rooted in the Romantic tradition. Other famous Romantic artists include George Stubbs, William Blake, John Margin, John Constable, JMW Turner, and Sir Thomas Lawrence. And Although Romanticism was very popular for the paintings, it was also popular for its music, and poetry, and even architecture. This shows that this period advanced not only in variety of artwork but also a variety of all sorts of effects. The German poets and critics, August Wilhelm and Friedrich Schlegel first used the term ?Romanticism? to label a wider cultural movement, the period expanded way more then they ever dreamed. This gave the Schlegel brothers a good time to show Christianity through art, even though the majority of people where using the plain Classical culture. This started the ?Romantic Movement. The ?Romantic Movement,? gained popularity in Germany and then quickly spread to England, France, and beyond. Eventually the movement reached America, this was around the year 1820, (some 20 years after William Wordsworth and Samuel Taylor Coleridge had revolutionized English poetry by publishing Lyrical Ballads). In America and in Europe, fresh new ideas and visions struck the artistic and intellectual circles in America.

Dear God Essay

Kalina, Presented to: Mrs. G December 20th, 2012 Dear God Movie Ethical Consideration The film â€Å"Dear God† directed by Garry Marshall is about a young man named Tom Turner who is a specialized con man. However, once he gets caught by the police, he has the choice to either go to jail or find a real job. He chooses the job. Tom finds himself working at a post office, sorting dead mail. In all likely turn of events, Tom finds himself answering â€Å"dear god† letters and helping those who are in desperate need to uncover the happiness they deserve.Faith plays a role in this film because even though nobody can physically see God, they continue to pray and write letters to him, hoping someone will hear their prayer. Justice also plays a role because justice is about empowering people who need it the most and doing what is right. Take the old man who wrote a letter that he was going to commit suicide. It is justice that out of all the letters that could have been picked, his showed up and a life was saved. He wrote that letter in some hope, someone would read it and save him.His faith and honesty in God led him to be saved. The world is anything but a perfect place. And even though so many of us live in luxurious houses and have access to so many technologies, there are always going to be people who need help. Whether it be money, taking to someone or saving lives. There are so many problems and issues people can have. It can be a large country as a whole, like third world countries who struggle to find water and food for themselves or someone battling depression. People have faith because they need to believe something good can happen for them.They need to know that someone is watching over them and that they are not alone. I think having faith in something or someone can give people the confidence to even start making their own choices and actions. I think it is so difficult for people to reach out and help others because we live in a world where there are so many complications, expectations and pressures. People have so much going on in their own life; they think they have no time to help others with theirs. We are so caught up in our own roblems we forget that so many others are faced with the same challenges and may even have it worse. Some people we also feel resent towards helping others because no one has helped them when they needed it. I feel like more people have become selfish and if they haven’t gotten something then they shouldn’t help someone else receive it either. Nowadays, people will only help others if they get something in return, but in my opinion that still doesn’t count as helping someone if you’re doing it for yourself. I think society is already on the path of self-absorption.And if continues to in the same way it is going, I think it could lead to a massive amount of deaths that are unnecessary. Take Egypt, Syria or even Greece for example, all these countries have major conflicts that have lead to protests and deaths. I think society will continue to behave selfishly if they continue on this path and nobody will appreciate the true meaning of life, all they will care about is money. I believe that a large amount of people in the world care more about money and possessions than they do about loved ones or people.However, I also believe that there are also many people who still possess a kind heart and do want to help others without their own benefit. If more people start to look at things from different viewpoints and put themselves in other people’s shoes, they can make a difference, just like Tom Turner. People need to start believing in the more positive aspect instead of the negative and have a little faith that sometimes people will do nice things for others without getting anything in return.