Monday, March 30, 2020

Television Influence Essays (1329 words) - Behavior, Human Behavior

Television Influence Television influences behaviors, social attitudes and physical health especially in children. Children today spend more time watching television than on any other single leisure activity. In fact, studies have shown that "the average child spends more time in front of the television than in school" (Clarke and Kurte-Coastes, 1997). There are a variety of influences that children gain from watching too much television. The impact of violence on children is a major issue, as well as the impact of stereotypical views, such as sex roles. Health can also become a problem for children who spend excessive amounts of time in front of the television. There are, however, alternatives to these problems. Parent, schools and the governments need to take control and monitor children and television. After all, television was once used as an educational tool it has only recently become a babysitter. The effect of violence in television has been debated for many years. In a recent study, Strasburger and Donnerstein (1999), suggests that there is a positive correlation between violence viewed on television and aggressive behavior in children. The way television violence is portrayed encourages children to learn aggressive attitudes and behaviors. For example most violence on television is glamorized by using a "good" character that is likely to be perceived as role model to initiate violence. This gives children the impression that violence is justified, desirable, and painless. Violence on television also increases fear or gives children the wrong impression about the world. Many children have a hard time making distinctions about what is real and unreal. Therefore, they begin to believe that the television depicts violence in the "real world." The bottom line is, "children learn their attitudes about violence at a very young age, and once learned, the attitudes tend to be life-long" (Strasburger and Donnerstein, 1999). Television also encourages stereotyped opinions on topics such as sex roles. Research shows that children who spend more time watching television tend to think that both women and men have specified roles in the world (Kent and Moy, 1999). Television usually portrays women as passive and weak compared to men who are usually depicted as strong and dominant (Steinberg and Kincheloe, 1997). This gives children a clear impression of what is expected of them in society. It insists that they too should act this way because it is, after all, what society views appropriate. Television even pushes children toward specific sex role using toys. Most toy commercials, for example, even insist that some toys are only for girls while others are only for boys. Children are very rarely encouraged to play with toys that are known to be for the opposite sex. For example, boys aren't aloud to play with dolls and girls aren't aloud to play with trucks. Television also emphasizes the importance of physical beauty. Stress is placed on looking a certain way, whether it is having the right clothing or being a certain weight. These are influences that children take very seriously considering that most children want to be the "popular" one in school. Take the Mighty Morphine Power Rangers, for example, the female good rangers are viewed typically as beautiful and perfect. The female villains are typically viewed as "repulsive" and are teased. In most schools this is the " kind of schoolyard harassment to which unpopular girls are subjected" (Steinberg and Kincheloe, 1997). Television also takes a major toll on a child's physical health. Obesity in children is rising and television is being credited in playing apart. One reason may be that children are spending less time on physical activities, such as, swimming and riding bikes (Vecchine, 1997). Evidence also shows that children like to snack while watching television, which can add to the weight especially for those children who do not do much physical activity. Commercials on television also play a part in weight gain among children. Commercials tend to enhance a child's craving for the food products being advertised which persuades children to buy their food. In most cases the food advertised on television is high in calories and fat, which adds weight (Anonymous, 1999). Although television influences many children all over the world there are alternatives to the problem. Starting at home parents need to be aware of what their children are watching, as well as how many hours are spent watching television. More importantly parents need to take time to watch and discuss the programs with their children. (victor stasburger and edward donnerstein, 7). This allows for the children, especially the smaller ones who have a hard time differentiating reality form fiction,

Saturday, March 7, 2020

The History and Origin of Aerosol Spray Cans

The History and Origin of Aerosol Spray Cans An  aerosol  is a  colloid  of fine  solid  particles or  liquid  droplets, in the air or another  gas.  Aerosols can be natural or artificial.  Frederick G. Donnan  presumably first used the term  aerosol  during  World War I  to describe an aero-solution, clouds of microscopic particles in the air. Origins The concept of an aerosol originated as early as 1790 when self-pressurized carbonated beverages were introduced in France. In 1837, a man called Perpigna invented a soda siphon incorporating a valve. Metal spray cans were being tested as early as 1862. They were constructed from heavy steel and were too bulky to be commercially successful. In 1899, inventors Helbling and Pertsch patented aerosols pressurized using methyl and ethyl chloride as propellants. Erik Rotheim On November 23, 1927, Norwegian engineer Erik Rotheim (also spelled Eric Rotheim) patented the first aerosol can and valve that could hold and dispense products and propellant systems. This was the forerunner of the modern aerosol can and valve. In 1998, the Norwegian post office issued a stamp celebrating the Norwegian invention of the spray can. Lyle Goodhue and William Sullivan During World War II, the U.S. government funded research into a portable way for servicemen to spray malaria-carrying bugs. Department of Agriculture researchers, Lyle Goodhue and William Sullivan, developed a small aerosol can be pressurized by a liquefied gas (a fluorocarbon) in 1943. It was their design that made products like hair spray possible, along with the work of another inventor Robert Abplanalp. Robert Abplanalp - Valve Crimp In 1949, 27-year-old Robert H. Abplanalp’s invention of a crimp on valve enabled liquids to be sprayed from a can under the pressure of an inert gas. Spray cans, mainly containing insecticides, were available to the public in 1947 as a result of their use by U.S. soldiers for preventing insect-borne diseases. Abplanalp’s invention made of lightweight aluminum made the cans a cheap and practical way to dispense liquids foams, powders, and creams. In 1953, Robert Abplanalp patented his crimp-on valve for dispensing gases under pressure. His Precision Valve Corporation was soon earning over $100 million manufacturing one billion aerosol cans annually in the United States and one-half billion in 10 other countries. In the mid-1970s, concern over the use of fluorocarbons adversely affecting the ozone layer drove Abplanalp back into the lab for a solution. Substituting water-soluble hydrocarbons for the damaging fluorocarbons created an environmentally friendly aerosol can that did not harm the environment. This put the manufacture of the aerosol spray can products into high gear. Robert Abplanalp invented both the first clog-free valve for spray cans and the Aquasol or pump spray, which used water-soluble hydrocarbons as the propellant source. Spray Paint in a Can In 1949, canned spray paint was invented by Edward Seymour, the first paint color was aluminum. Edward Seymours wife Bonnie suggested the use of an aerosol can be filled with paint. Edward Seymour founded Seymour of Sycamore, Inc. of Chicago, USA, to manufacture his spray paints.