Properties of Engineering Materials free essay sample

Building materials Choice of materials for a machine component relies particularly upon its properties, cost, accessibility and such different variables. It is in this manner imperative to have some thought of the regular building materials and their properties before learning the subtleties of plan technique. Basic designing materials are typically named metals and nonmetals. Metals may helpfully be partitioned into ferrous and non-ferrous metals. Significant ferrous metals for the current object are: (I) Cast iron (ii) created iron (iii) steel. A portion of the significant non-ferrous metals utilized in building configuration are: (a) Light metal gathering, for example, aluminum and its combinations, magnesium and Manganese amalgams. (b) Copper based amalgams, for example, metal (Cu-Zn), bronze (Cu-Sn). (c) White metal gathering, for example, nickel, silver, white bearing metals e. g. Choice models for building materials The determination of material, for designing objects, is one of the most troublesome issue for fashioner. The best material is one which serves the ideal goal at the base expense. The accompanying components ought to be thought of while choosing the material: 1. Accessibility of the materials. . Appropriateness of the materials for the working conditions in administration. 3. The expense of the material. 4. Its powerlessness to erosion. 5. Its physical, concoction just as warm soundness. 6. Material must withstand administration requests. For example, dimensional soundness, sufficient quality, durability, warm conductivity and so on 7. The degree of the burdens instigated. 8. Factor of wellbeing wanted. 9. The underlying worries during the material preparing. 10. Its thickness, dissolving point, breaking point at the working conditions. 11. The degree of surface completion required. 12. Creation prerequisite. 13. Simplicity of joining, fix by welding and so on 4. Superfluity and recyclability. 15. The feel of the material. 16. Substance nature of the material. 17. Ecological conditions. Mechanical properties of designing materials Elasticity This is the proper ty of a material to recapture its unique shape after distortion when the outside powers are expelled. All materials are plastic somewhat yet the degree changes, for instance, both mellow steel and elastic will be flexible materials yet steel is more versatile than elastic. Versatility This is related with the perpetual twisting of material when the feeling of anxiety surpasses the yield point. Under plastic conditions materials in a perfect world twist with no expansion in stress Strength It is the capacity of a material to oppose disfigurement. The quality of a segment is typically viewed as dependent on the most extreme burden that can be borne before disappointment is clear. In the event that under straightforward pressure the lasting disfigurement (plastic strain) that happens in a segment before disappointment, the heap conveying limit, at the moment of definite burst, will presumably be not exactly the most extreme burden bolstered at a lower strain on the grounds that the heap is being applied over fundamentally littler cross-sectional zone. Under straightforward pressure, the heap at crack will be the greatest appropriate over an altogether amplified zone contrasted and the cross-sectional territory under no heap. Malleability It is all the more ordinarily characterized as the capacity of a material to distort effectively upon the use of an elastic power, or as the capacity of a material to withstand plastic twisting without burst. Malleability may likewise be thought of as far as twist capacity and crushability. This is the property of the material that empowers it to be attracted out or extended to an apparent degree before burst happens. The rate lengthening or rate decrease in zone before crack of a test example is the proportion of malleability. Typically if rate extension surpasses 15% the material is flexible and in the event that it is under 5%the material is weak. Lead, copper, aluminum, mellow steel are run of the mill malleable materials. Pliable materials show enormous distortion before crack. The absence of flexibility is frequently named fragility. For the most part, if two materials have a similar quality and hardness, the one that has the higher malleability is increasingly attractive. The flexibility of numerous metals can change if conditions are modified. An expansion in temperature will build malleability. A reduction in temperature will cause decline inductility and a change from flexible to weak conduct Malleability Where flexibility is the capacity of a material to distort effectively upon the use of a ductile power, pliability is the capacity of a metal to show enormous misshapening or plastic reaction when being exposed to compressive power. It is an extraordinary instance of flexibility where it tends to be folded into slight sheets however it isn't important to be so solid. Lead, delicate steel, fashioned iron, copper and aluminum are a few materials arranged by decreasing pliability. Uniform compressive power causes disfigurement in the way appeared in Figure 7. The material agreements pivotally with the power and extends along the side. Restriction because of grating at the contact faces actuates hub pressure outwardly. Pliable powers work around the circuit with the horizontal extension or expanding bigness. Plastic stream at the focal point of the material additionally incites strain. Thusly, the basis of break (that is, the constraint of plastic distortion) for a plastic material is probably going to rely upon malleable instead of compressive pressure. Temperature change may alter both the plastic stream mode and the break mode. Durability The quality known as sturdiness portrays the manner in which a material responds under unexpected effects. This is the property which empowers a material to be turned, twisted or extended under effect burden or high worry before crack. It might be viewed as the capacity of the material to assimilate vitality in the plastic zone. The proportion of sturdiness is the measure of vitality ingested in the wake of being focused on upto the purpose of break. It is characterized as The work required to misshape one cubic inch of metal until it breaks. Strength is estimated by the Charpy test or the Izod test. Both of these tests utilize an indented test. The area and state of the indent are standard. The purposes of help of the example, just as the effect of the sledge, must bear a consistent relationship to the area of the score. Hardness is the property of a material that empowers it to oppose plastic distortion, infiltration, space, and scratching. In this manner, hardness is significant from a building angle since protection from wear by either contact or disintegration by steam, oil, and water for the most part increments with hardness. A few techniques have been created for hardness testing. Those frequently utilized are Brinell, Rockwell, Vickers, Tukon, Sclerscope, and the records test. The initial four depend on space tests and the fifth on the bounce back tallness of a jewel tipped metallic mallet. The document test sets up the attributes of how well a record takes a chomp on the material. Creep When a part is exposed to a consistent burden over a significant stretch of time it experiences a moderate perpetual distortion and this is named as â€Å"creep†. This is reliant on temperature. As a rule at raised temperatures creep is high. Flexibility This is the property of the material that empowers it to oppose stun and sway by putting away vitality. The proportion of strength is the strain vitality assimilated per unit volume. For a bar of length L exposed to elastic burden P, a direct burden avoidance plot is appeared in figure-Brittleness-This is inverse to pliability. Weak materials show little distortion before break and disappointment happen unexpectedly with no notice. Ordinarily if the lengthening is under 5% the material is viewed as weak. E. g. cast iron, glass, earthenware production are run of the mill fragile materials. Weakness Fatigue is a wonder related with variable stacking or all the more correctly to cyclic pushing or stressing of a material. Similarly as we individuals get weakness when a particular assignment is over and again performed, along these lines metallic segments exposed to variable stacking get exhaustion, which prompts their untimely disappointment under explicit conditions. Weariness stacking is fundamentally the sort of stacking which causes cyclic varieties in the applied pressure or strain on a part. In this way any factor stacking is essentially a weakness stacking. Stress Concentration In building up a machine it is difficult to keep away from changes in cross-segment, holes,notches, shoulders and so on. A few models are appeared in figure Any such brokenness in a part influences the pressure circulation in the area and the intermittence goes about as a pressure raiser. at whatever point a machine segment changes the state of its cross segment, the basic pressure conveyance doesn't holds great and the area of intermittence is distinctive this abnormality in the pressure appropriation brought about by sudden changes of structure is called pressure fixation. It happens for a wide range of worries in the prescence of filets, scores, openings, keyways, splines, surface harshness or scratches and so on the nominalstress morally justified and left sides, of the previously mentioned segments, will be uniform however in the area where the cross segment is changing, a re-dissemination of the power whithin the part should take plac. The material close to the edges is focused on impressively higher than the normal worth. The most extreme pressure happens sooner or later on the filet and is guided corresponding to the boundry by then. Theoratical or structure pressure fixation factor The theoratical or structure pressure focus factor is characterized as the proportion of the greatest worry in a part (at an indent or filet) to the ostensible worry at a similar segment dependent on net territory. Numerically, theoratical or structure pressure fixation factor. Kt = Maximum pressure Nominal pressure Methods of decreasing pressure focus various strategies are accessible to diminish pressure fixation in machineparts. Some of them are as per the following: 1. Give a filet r

Johannes Itten Example For Students

Johannes Itten Biography A celebrated painter, a teacher, and architect was conceived in 1888 in Switzerland. Having shown kids in elementary schools for a bit, Johannes Itten began going to Geneva École des Beaux-Arts for one semester. Following a couple of years, he got to know Walter Gropius, who welcomed Itten to be an ace at the Bauhaus. He set up a fundamental course at the Bauhaus, which was his own widespread structure hypothesis. His convention completely changed the instruction of craftsmanship. The idiosyncrasy of instructing was that he advised understudies not to emulate crafted by the conspicuous bosses however to investigate and build up their own emotions, strategies, and styles. The course comprised of three sections: common structures and craft of shading, the examination of canonic bits of craftsmanship and life drawing. Johannes Itten established his school of workmanship, where he showed comprehensive craftsmanship. Outline1 Arts made by Johannes Itten1.1 The Encounter (1916).1.2 Tower of Fire (1920).1.3 Study of Contrasts (1920).2 Key thoughts in painting Expressions made by Johannes Itten Here you will discover the artistic creations of Johannes Itten, which turned into the features of his innovative work. They are mainstream even in present day times where tastes and styles vary a great deal. The Encounter (1916). The Encounter fine art had been painted before Itten shown up to the Bauhaus and had contained the most significant models that would later get pivotal for his instructing there. Itten’s shading wheel, use of geometric figures: circles, square shapes, triangles broke the ground for his future advantages. The fine art represents a part of compositions made during 1915-1916. Another significance is an individual one that those artworks connected the terrible demise of his darling sweetheart, H. Wendland. The work speaks to the entwinement of winding figures. The Encounter work of art can be seen as the investigation of the specialty of shading and its elements. Tower of Fire (1920). In his initial years, Johannes Itten was enamored with painting engineering structures, in light of the course of action of various geometric figures. Tower of fire work of art was a case of a figure that could never be figured it out. The sculpture is develop out of red, blue and yellow squares. There are 12 obstructs: the initial four are supposed to be made of stone, the following four are metal ones, and the upper ones represent air, wind, water, and earth. In the Itten shading hypothesis, the number twelve has its own significance, similarly as in the alendar. Investigation of Contrasts (1920). The understudy Moses Mirkin made the fine art during the Itten’s course. The assignment was to examination and attempt to join materials, for example, wood, iron, and glass. Understudies needed to utilize their inventiveness and quest for the approaches to join such materials. This experimentation got basic for the training of craftsmanship. The emphasis on materiality was a guide for understudies on the Bauhaus educational program, sorted out by the medium. Key thoughts in painting Vorkurs or, as such, establishment course by Johannes Itten set up methods and styles at the Bauhaus that got pivotal for showing the workmanship these days. The primary concern was to support and build up the longing in understudies of not being reluctant to try different things with hues and shades, materials, and styles. The course was the first and a mandatory one in Bauhaus educational plan. No understudy had the option to proceed onward to the following course without finishing the first. Johannes Itten roused understudies to utilize components of a genuine mystery in their compositions. Being keen on neo-Zoroastrian religion, he showed his understudies how to reflect and relax. Vaulting was one of the components with regards to augmenting innovative abilities. At the Bauhaus, they utilized Itten’s lessons generally until new way of thinking was presented. .u12d1555eaded2a546c3a9c587c0e7fda , .u12d1555eaded2a546c3a9c587c0e7fda .postImageUrl , .u12d1555eaded2a546c3a9c587c0e7fda .focused content territory { min-tallness: 80px; position: relative; } .u12d1555eaded2a546c3a9c587c0e7fda , .u12d1555eaded2a546c3a9c587c0e7fda:hover , .u12d1555eaded2a546c3a9c587c0e7fda:visited , .u12d1555eaded2a546c3a9c587c0e7fda:active { border:0!important; } .u12d1555eaded2a546c3a9c587c0e7fda .clearfix:after { content: ; show: table; clear: both; } .u12d1555eaded2a546c3a9c587c0e7fda { show: square; change: foundation shading 250ms; webkit-progress: foundation shading 250ms; width: 100%; obscurity: 1; change: darkness 250ms; webkit-progress: mistiness 250ms; foundation shading: #95A5A6; } .u12d1555eaded2a546c3a9c587c0e7fda:active , .u12d1555eaded2a546c3a9c587c0e7fda:hover { murkiness: 1; change: haziness 250ms; webkit-progress: darkness 250ms; foundation shading: #2C3E50; } .u12d1555eaded2a546c3a9c587c0e7fda .focused content region { width: 100%; position: rela tive; } .u12d1555eaded2a546c3a9c587c0e7fda .ctaText { outskirt base: 0 strong #fff; shading: #2980B9; text dimension: 16px; textual style weight: intense; edge: 0; cushioning: 0; content enrichment: underline; } .u12d1555eaded2a546c3a9c587c0e7fda .postTitle { shading: #FFFFFF; text dimension: 16px; textual style weight: 600; edge: 0; cushioning: 0; width: 100%; } .u12d1555eaded2a546c3a9c587c0e7fda .ctaButton { foundation shading: #7F8C8D!important; shading: #2980B9; fringe: none; fringe range: 3px; box-shadow: none; text dimension: 14px; text style weight: striking; line-stature: 26px; moz-outskirt sweep: 3px; content adjust: focus; content improvement: none; content shadow: none; width: 80px; min-tallness: 80px; foundation: url(https://artscolumbia.org/wp-content/modules/intelly-related-posts/resources/pictures/basic arrow.png)no-rehash; position: outright; right: 0; top: 0; } .u12d1555eaded2a546c3a9c587c0e7fda:hover .ctaButton { foundation shading: #34495E!important; } .u12d1555ea ded2a546c3a9c587c0e7fda .focused content { show: table; stature: 80px; cushioning left: 18px; top: 0; } .u12d1555eaded2a546c3a9c587c0e7fda-content { show: table-cell; edge: 0; cushioning: 0; cushioning right: 108px; position: relative; vertical-adjust: center; width: 100%; } .u12d1555eaded2a546c3a9c587c0e7fda:after { content: ; show: square; clear: both; } READ: Coco ChanelItten worked out a shading hypothesis, the matter of which lies in relationship of sorts of individuals or seasons with hues and its shades. In his work, it is expressed that there exist seven sorts of relative investigation.

The Complete Guide on How to Check For Plagiarism

The Complete Guide on How to Check For Plagiarism Are you struggling with plagiarism? If yes then we are going to share with you the best ever tips on how to check for Plagiarism. Here we go:- What Is Plagiarism? Summary What Is Plagiarism?What Kind Of Work Is Considered As Plagiarism?Who Cares If You Are Plagiarise?Plagiarism is StealingPlagiarism Signifies Illiteracy of KnowledgeHow To Check Plagiarism?Conclusion Most of the people consider plagiarism as copying work or borrowing unique concepts of another person. But terms like copying and borrowing can cover the seriousness of the offense. In simple words, plagiarism is often considered as a fraud act. It includes both stealing works of somebody and after doing that lying about it. What Kind Of Work Is Considered As Plagiarism? Turning work of another person as your personalCopying ideas or exact words without giving credit to the personNot providing a quotation in quotation marksMentioning improper information related to the quotation sourceAdjusting words but stealing the sentence structure without giving proper credit Plagiarism can be avoided by citing proper sources in the document. It is important to provide necessary information to the audience to find that source form data has been gathered. Giving credit is a good way to prevent plagiarism. Who Cares If You Are Plagiarise? Without any doubt, you are the first person who should. Also, there are various stakeholders to consider while copying the content of other authors as a student. For example, your future employers and academic institution are the main stakeholders to consider at that time. There are two main important reasons a student should not plagiarize academic work: Plagiarism is Stealing It often considered as stealing to copy work concepts, significant opinions, and structure of sentences other persons. Ethically, it often considered as an act of stealing something precious. As a student, if any person stole your concepts, how would you personally feel? Plagiarism Signifies Illiteracy of Knowledge If you copy others work, you are indicating that you are not sufficiently expert in expressing your personal ideas and thoughts. Basically, being caught copying is an indication of illiteracy in managing information that is not a good impression a student wants to show. Also, it can have some opposing effects relating to the ability of the students to get better employment chances in their future. So the students should be careful while using another persons work. How To Check Plagiarism? Using an online plagiarism checker software is an easy process. Any student or individual can submit a plagiarism-free paper by using such software online to improve the grades and ensuring the originality of work. There is a simple process on our website presented below to check the plagiarism: At first, you just need to Log in to the website and upload your document over an easy process for checking plagiarism with the help of an expert.Wait for the expert to submit your document, as well as examine the content.The expert will scan your document properly with all grammatical and plagiarism based errors in the document for further analysis.Once the scan is completed, our experts do a comparative analysis of content.All copied words will be highlighted inside the plagiarism report.At last, a free plagiarism report will be provided to you, which provides overall duplication information. It is essential to understand that a highlighted passage only signifies a possible plagiarism act. At last, only a human can make a conclusion about whether to consider a passage plagiarized. Conclusion As it is clear that plagiarism is a fraud act, so the consequence of being caught while copying content would be quite profound. If any student caught copying, the instant outcome they would face is to be proven as untrustworthy and inactive. Such characteristics are not only harmful to their academic position but future success as well. Proper information related to plagiarism is covered in the above paragraphs. In case students are having any issue, they can use plagiarism checker software on our website to compare their submitted text with a database and finding all identical paragraphs. Our website provides a plagiarism checking service to ensure originality and grammatical errors of your work.Try our free plagiarism checker.

Differences Between Mass, Spree and Serial Killers

Multiple murderers are people who have killed more than one victim. Based on the patterns of their murders, multiple killers are classified into three basic categories—mass murderers, spree killers, and serial killers.  Rampage killers is a relatively new name given to both mass murderers and spree killers. Mass Murderers   A mass murderer kills four or more people at one location during one continuous period of time, whether it is done within a few minutes or over a period of days. Mass murderers usually commit murder at one location. Mass murders can be committed by a single individual or a group of people. Killers who murder several members of their family also fall into the mass murderer category. An example of a mass murderer would be Richard Speck. On  July 14, 1966, Speck systematically tortured, raped and killed eight student nurses from South Chicago Community Hospital. All of the murders were committed in a single night in the nurses south Chicago townhouse, which had been converted to a student dormitory. Terry Lynn Nichols is a mass murderer convicted of conspiring with Timothy McVeigh to blow up the Alfred P. Murrah Federal Building  in Oklahoma City on  April 19, 1995. The bombing resulted in the deaths of 168 people, including children. Nichols was given a life sentence after the jury deadlocked on the death penalty. He then received 162 consecutive life terms on federal charges of murder. McVeigh was executed on June 11, 2001, after being found guilty of detonating a bomb hidden in a truck parked in front of the building. Spree Killers Spree killers (sometimes referred to as rampage killers) murder two or more victims, but at more than one location. Although their murders occur in separate locations, their spree is considered a single event because there is no cooling-off period between the murders. Differentiating  between mass murderers, spree  killers, and serial killers is the source for ongoing debates among  criminologists. While many experts agree with the general description of a spree killer, the term is often dropped and mass or serial murder is used in its place. Robert Polin is an example of a spree killer. In October 1975 he killed one student and wounded five others at an Ottawa high school after earlier raping and stabbing a 17-year-old friend to death. Charles Starkweather  was a spree killer. Between December 1957 and January 1958, Starkweather, with his 14-year-old girlfriend by his side, killed 11 people in Nebraska and Wyoming. Starkweather was executed by  electrocution  17 months after his conviction. William Balfour, known for the Jennifer Hudson family murders, also fits the spree killer pattern. Serial Killers Serial killers murder three or more victims, but each victim is killed on separate occasions. Unlike mass murderers and spree killers, serial killers usually select their victims, have cooling-off periods between murders, and plan their crimes carefully. Some serial killers travel widely to find their victims, such as Ted Bundy and Israel Keyes, but others remain in the same general geographic area. Serial killers often demonstrate specific patterns that can be easily identified by police investigators. What motivates serial killers  remains a mystery; however, their behavior often fits into specific sub-types. In 1988, Ronald Holmes, a criminologist at the University of Louisville who specializes in the study of serial killers, identified four subtypes of serial killers. The Visionary - Usually psychotic, the visionary is compelled to murder because they hear voices or sees visions ordering them to kill certain kinds of people.Mission-Oriented - Targets a specific group of people who they believe are unworthy to live and without whom the world would be a better place.Hedonistic Killer - Kills for the thrill of it because they enjoy the act of killing and sometimes becomes sexually aroused during the act of murder. Jerry Brudos, the Lust Killer, fits this profile.Power-Oriented - Kills to exert ultimate control over their victims. These murderers are not psychotic, but they are obsessed with capturing and controlling their victims and forcing them to obey their every command. Pedro Alonso Lopez, Monster of the Andes, abducted children with the intent to control them even after death. According to a report issued by the F.B.I., there is no single identifiable cause or factor that leads to the development of a serial killer. Rather, there is a multitude of factors that contribute to their development. The most significant factor is the serial killer’s personal decision in choosing to pursue their crimes.

Ethics And Public Health Ethics - 851 Words

There are important, distinguishable differences between medical ethics and public health ethics. Medical ethics pertain primarily to the individual that is involved in the care paradigm (Coleman, Bouà «sseau, Reis, Capron, 2007). Public health ethics, by contrast, are focused primarily on the health of the population as a whole. The American Public Health Association has published its own code of public health ethics that it felt most appropriately provided guiding principles to the public health sector (Thomas, Sage, Dillenberg, Guillory, 2002). Throughout the public health code of ethics, the emphasis is clearly and definitively focused on the word â€Å"community†. The connection between individuals interacting in the community is stressed to show the importance of individual health on the community as a whole. The public health code of ethics is focused more generally on the health care provided to communities and populations and does not focus directly on a specific p rofessions interactions should be with a patient, but instead broadly stated what â€Å"public health† should do. In comparison, The AMA Code of Medical Ethics focuses specifically on what the physician should do (Riddick, 2003). Although the AMA Code of Medical Ethics directly mentions the need for a physician to recognize the importance of community and public health, as well as supporting access to all people, it also mentions that a physician should be able to choose freely who and where to practice andShow MoreRelatedThe Ethics Of Public Health863 Words   |  4 PagesWhen it comes to the ethic of public health and medical health, they hold two totally different definitions. 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Reflection Ronaldo Macedo Presentation Free Essays

Presentation Reflecting upon, Ronald Macedon presentation I took that one can dream big and accomplish our goals, If we work hard for them. By using one of the most Import NT tools any human being can have, education. Ronald Macedon, mentioned how he and his family came to the united States as Immigrants, and he worked as a Mechanic as young guy. We will write a custom essay sample on Reflection Ronaldo Macedo Presentation or any similar topic only for you Order Now But there was one person, a mentor who believed in him and in his potent till to do greater things. He knew that Ronald Macedon, can achieve a higher education cause he had talent. As a consequence, Ronald Macedon went on to college,and is now a prestigious professor at university of Massachusetts. He talked about the importance of using education, and providing the same opportunities for all children regardless of where they come from. He mentioned there is an alarming drop out rat e of students of color, in high schools across the country, and that as professional educators we have the potential to create changes. Therefore we should not have limitations in what we can do, but open opportunities so that children can have a bet ere future for themselves. I thought it was inspiring to hear someone, who came from living in a low income community,and from a family who came as immigrants, rise to the top and be such an Influential and inspiring person to many people around the world. I persona did feel that he was able to communicate his message across the audience In a way that motivated me to become more Informed and be able to find the resources needed d to help children stay In school and Inspire them to think about their future and become me well educated citizens. How to cite Reflection Ronaldo Macedo Presentation, Papers

One Of The Biggest Problems Which The United States Is Faced Essays

One of the biggest problems which the United States is faced with is juvenile crime. The reason experts feel juveniles commit crimes is because of risk factors when they were younger but experts still have not found the main reason why juveniles commit crimes. Some risk factors associated with juvenile crime are poverty, repeated exposure to violence, drugs, easy access to firearms, unstable family life and family violence, delinquent peer groups, and media violence. Especially the demise of family life, the effect of the media on the juveniles today, and the increase of firearms available today have played a big role in the increase of juveniles crimes. The most common risk factor is the demise of the family life and the increase in family violence. Between 1976 and 1992 the number of juveniles living in poverty grew 42% and this caused an increase in crimes by juveniles. Many of these juvenile criminals have been abused or neglected and they also grew up in a single-parent household. Research has found that 53% of these children are more likely to be arrested, and 38% more likely to commit a violent crime as an adult, then their counterparts who did not suffer such abuse. The symptoms of child abuse are high levels of aggression and antisocial behavior and these children are twice as likely to become juvenile offenders. Also improper parental care has been linked to delinquency such as mothers who drink alcohol or take drugs during pregnancy cause their babies to grow up with learning disorders, a problem which leads them to be juvenile criminals. Another risk factor is the effect of the media on the juveniles of today. Before the time a child has reached seventh grade, the average child has witnessed 8,000 murders and 100,000 acts of violence on the television. There is no doubt that heavy exposure to televised violence is one of the causes of aggressive behavior, crime and violence in society. Television violence affects youngsters of all ages, of both genders, at all economic levels, and all levels of intelligence. Long-term childhood exposure to television is a casual factor behind one half of the homicides committed by juveniles in the United States. The increased availability of guns has played a big part in escalating the number of crimes committed by juveniles. In Los Angeles juvenile delinquency cases involving weapon violation grew by 86% from 1988 to 1992, which was more then any other type of juvenile offense. According to a University of Michigan study found that 270,000 guns accompany secondary school students to class daily. This is startling because it shows how many more juveniles are carrying guns and the juvenile use of guns in homicides has increased from 65 to 80 percent from 1987 to 1991. The possession of firearms plays a big cause in the delinquency of children and is playing a bigger role in the crimes which juveniles commit. Another cause of the increase of juvenile crimes has been the effect of children seeing multiple murders and other acts of violence on the television. Finally the demise of the family life and the increase in family violence has been the biggest factor in the increase of juvenile crime.