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Advantages and disadvantages of using cell phones
Negative effects of mobile phones in communication
Advantages and disadvantages of using cell phones
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Recommended: Advantages and disadvantages of using cell phones
Slide 1:
This is my presentation on lead in cell phones.
Slide 2:
Smart phones have dramatically changed the way we communicate. I know for certain that after seeing my friends during the day that when I get home I can immediately text them or snap chatting or any of the ways we communicate. I can’t imagine living in a world without being able to communicate with my friends across the room or across the globe at the click of a button. Sitting in my room I can check the news, play a game and talk to my friend in America all at the same time. The technology has advanced so much since the first iPhone. Along with other smart phones they have changed the way we communicate because we can just pick up the phone and talk to someone and you can text a question or facetime them. Smart phones have changed the world because at the tips of your fingers anywhere you can check the weather, watch a video, listen to music, take a picture, get directions, check the time, get information from the internet and watch your favorite TV show.
Slide 3
Lead in number 82 on the periodic table. Lead is usually found in ore with silver and copper and it is extracted together with them. Lead occurs naturally in the environment. However, most lead that is found in the environment results from human uses such as lead from batteries, gasoline or lead that has escaped into the environment from places like smelters.
Slide 4
These are the physical properties of lead. It is a metal which is usually a bluish white color. It is capable of being shaped or bent. It has poor transmission of heat or electricity It is quite soft and can be stretched without breaking.
Slide 5
Leads chemical properties are that it dissolves slowly in water, it doesn’t react with oxygen in the air, it doesn’t burn and it reacts quickly with hot acids but it reacts slowly to cold ones. It is resistant to corrosion but it tarnishes when it is exposed to air and it is toxic
Slide 6
Lead is usually used in cell phone screens, circuit boards and the buttons.Lead is commonly used as a stabilizer in products and for pigment in paint, rubber, plastics, and ceramics. Lead's chemical properties also make it easy to use in metal products.
Slide 7
Lead impacts brain development, causing learning problems including lower IQ scores and shorter attention spans.
Lead is a metal found virtually everywhere even today. Sources of lead include auto body shops, electric storage batteries, glazes for china dishes, crockery, insecticides, electric cable insulation, hose, pipe, sheet and floor coverings. Lead is associated with stain glass work, jewelry making and antique ceramic doll painting. Although lead in paint was outlawed, there are still many homes that have lead paint (White et al, 1990). Lead found in gasoline was found in one study to account for 23--27% of the lead blood levels in the people tested (Wagner, 1991). This exposure to lead sources is more of a concern for children due to the characteristic habit of children to taste everything they touch; this characteristic is known as pica. Children are also in closer contact with their lead polluted environment during play. They are more active and exposed to outdoor contaminates and they inhale dust and dirt that are lead contaminated. Furthermore, the adsorption rate of lead in the digestive tract is up to 10 times greater in chil...
Question: In considering the monetary estimates of childhood lead poisoning prevention, list and note the relative importance of the categories of costs and benefits that need to be considered is projecting a cost/benefit ratio. Use a standard housing remediation approach for those expenses. Where does the balance lay? What are the options and barriers to moving it forward?General Effects of Childhood Lead Poisoning When lead in inhaled it, the lead could be deposited in the bones where some essential body function occurs e.g. blood formations, calcium absorption. Lead is also transported in blood stream and deposited in muscle and nerves and blood vessels. The deposition of lead in these organs systems eventually results in the malfunctioning of these organs. These malfunctions could include decrease in bone and muscle growth/co-ordination, damage to the nervous system and other organs of the body. (KidsHealth, 1995-2010) The above mentioned effects could also impair breakdown and use of nutrients by the body, decreased hearing ability. In addition, it affects child growth, in the sense that it has been shown that children with higher blood lead levels may on average be shorter than their genetic potential by 1cm.Effect of Lead on cognition and Behavior of Children: Lead poisoning have been identified as one of the factors responsible for cognitive deficits and mental illness among children. There has been shown a correlation between Blood Lead Level and cognitive functioning in children and infant (Bruce P. Lanphear, 2005). Bruce P et al in a study of Low-level environmental lead exposure and children's intellectual function, showed an inverse relationship between blood lead concentrations and IQ score...
lead are more prone to developing ADHD. Some scientists in Brittan have linked a higher
6. Bellinger, D., Leviton, A., and Sloman, J. "Antecedents and Correlates of Improved Cognitive Performance in Children Exposed in Utero to Low Levels of Lead." Environmental Health Perspectives. 1990; 89: 5-11.
There are differences in the primary routes of exposure, Babies and children can swallow lead through breast feeding. They can be exposed to lead in the womb if their mothers have lead in their bodies. In children ingestion is the major route of exposure. Lead paint is the major source. In older houses as the lead paint deteriorates, peels, chips or is...
These include, high strength, low weight, high chemical resistance and high cut resistance. This material does not corrode or rust and is also unaffected when placed in or under water.
Once used for varying applications, lead is now known for its toxicity in the human body. Dr. Gary Goldstein, the chief executive of Kennedy Krieger Institute wrote, “Exposure to excessive amounts of inorganic lead during toddler years may produce lasting adverse effects upon brain function (Goldstein 1990).” Lead poisoning awareness has become increasingly prevalent in the American government, with lead poisoning testing recommended as early as nine to twelve months of age (Health and Human Services 2011). This paper will explain briefly lead’s history and industrial uses, as well as give an in-depth analysis on lead’s exposure to children and how it affects their developing brains.
When cell phones were first introduced, all you could do was call others and talk for half an hour. It was like a brick and took ten hours to charge. It also cost $3995. That’s a lot more than most of today’s cell phones. Even, though it was a very basic phone, it began impacting the world. Now, you could call your relatives and actually talk with them without being next to them. Parents gave their kids cell phones to stay in touch. Now you can contact anyone through your mobile phone in multiple ways. You can text, call, facetime or message someone through social media. Cell phones abilities
Most cadmium is obtained as a by-product from the smelting of zinc, lead or copper ores. Cadmium has a number of industrial applications, but it is used mostly in metal plating, pigments, batteries, and plastics.
Electroplating is used to keep an old metal looking new. It can also be used to make one metal look like another. Electroplating is used in a lot of cases. A very well known use is on cars. This keeps a car looking shiny and attractive. Copperplating is most commonly used to prevent metal from hardening. Silverplating is mainly used on tableware and electric contacts. Goldplating may be found on jewelry and watchcases. Zinc is often used to prevent corrosion of steel objects. A nickel or chromium plating may be found on cars or household appliances (“Electroplating”).
Symptoms of lead poisoning include loss of appetite, weakness, anemia, vomiting, and convulsions, sometimes leading to permanent brain damage or death. Children who ingest chips of old, lead-containing paint or are exposed to dust from the deterioration of such paint may exhibit symptoms. Levels of environmental lead considered nontoxic may also be involved in increased hypertension in a significant number of persons, according to studies released in the mid-1980s. As a result, the U.S. Centers for Disease Control in recent years have been revising downward the levels of environmental lead that it would consider safe.
Despite the short amount of time since the introduction of the smartphone, the rapid development of the software and technology has had a tremendous effect on the everyday life in society today. The concept of communicating through a telephone was developed in the 1870s. Devices to transmit speech electrically were designed by Elisha Gray and Alexander Graham Bell, but Bell's design was patented first. On March 10, 1876, Alexander Graham Bell achieved one of his greatest successes in the making of the telephone. This brought upon a major change in communication and gave leeway to the improvement of the telephone in the days to come (Bellis, 2013b). During the 20th century there were many innovations regarding the telephone. In 1973, the first call from a portable phone was made Martin Cooper, who was a Motorola researcher and executive at the time. Since its inception, the advancement of cell phones has been exponential (Bellis, 2013a). As a result, cell phones have changed how society works in today's world. Many people lack the insight of how cell phones, or in this case, smart phones, affect the people that use them. So the question is, how is the evolution of smart phones impacting our society?
Some facts about metals are that they are generally ductile, meaning that they can be hammered thin or drawn into wires. Metals can also be liquified by heating and then resolidified by cooling. Presently metals are the strongest building materials in common use. Found in nature, metals come in the form of oxide ores, meaning they are a compound of oxygen mixed with a mineral containing a valuable constituent such as metal. Metals can also corrode and wear away by oxidation.
“We barely have time to pause and reflect these days on how far communicating through technology has progressed. Without even taking a deep breath, we’ve transitioned from email to chat to blogs to social networks and more recently to twitter” (Alan 2007). Communicating with technology has changed in many different ways. We usually “get in touch” with people through technology rather than speaking with them face to face. The most popular way people discuss things, with another individual, is through our phones. Phones have been around way before I was born in 1996, but throughout the years, they have developed a phone called a “smart phone”. The smart phone has all kinds of new things that we can use to socialize with our peers. On these new phones, we can connect with our friends or family on social networking sites such as Facebook, Twitter, and Instagram. Technology has also developed Skype, a place you can talk with people on the computer with instant voice and video for hours. The new communication changes have changed drastically from the new advances made in technology through our smart phones, social networking sites, and Skype.
Twenty-five years ago, a phone was just a way to contact someone. Mobile phones have become one of the most common tools of communication for both young and old. Cellular devices have redefined relationships and social conduct, and transformed the daily lives of many individuals. Cell phones no longer function just as a communication device. Today it has many other uses.