Introduction to science
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This document summarizes the history and effects of electronic devices. It discusses how electronics began with the vacuum tube innovation in 1907 and the invention of the microprocessor in 1968. It outlines both the positive effects of electronics in simplifying manufacturing and the negative effects on children's social skills and reliance on calculators. The document also discusses concerns about the health effects of electromagnetic fields from devices and the contradictory evidence regarding impacts on balance, pain, and brain tumors.
Introduction to science
- 1. Presented and designed by a group of WBUT students Department IT Damayanti Ghosh, Manali Das , Kanak, Sudipta and Sudeshna For all the students of 1st year
- 2. • The use of electronic devices is growing day by day. They are common at home, in schools & at work. Nearly all the working places & living places have computers,televisions,radio,telephones,mobile,fax,air- conditions,camera etc.
- 3. • Modern electronics began with the innovation of the vaccum tube by Dr. lee Deforest in 1907. • Microprocessor chip was invented by Dr. M.E.Ted Hoflin in 1968 • IntelCorporation introduced commercial microprocessor in 1971 designed for a japanese calculator company. • To understand the interesting history of electronic devices helps explain why science and technology are important too.Witout the electronics, our status in this world community would be diminished, therefore it is important to study the history too.
- 5. Think about gadgets you use. Jupiter, Saturn, Uranus, and Neptune all have rings.
- 6. What is our benefit? Electronics simplify the complexity of many manufacturing process and household work . The transfort system becomes better,safer,environ- friendly, pollution reducing. Digital cameras,camcorders,TVs,photo frames,etc help us to get rid of the traditional way to enjoy precious moments and relieve those. Development in communication,researh,demonestration and administration. And many more..
- 7. We and the Digital world: society Digital media education Security systems Design and awareness- administration social networks communication distance learning and OCWs amusement Cellphones and andriods
- 8. Gadgets are our friends only.
- 9. Bad effect of electronics devices on Children In some cases they can become reliant on them, take for example the calculator. I knew a kid who was so reliant, they couldn't do basic math without one (I'm talking anything past addition and some subtraction - even that was too hard.) This was in their final years at school. Socially, some use them as a replacement for friends and 'normal' activities. Especially if they're being bulied at school, it can become an escape and then it can become their entire world if the parents (or the kid if they're old enough) aren't careful. In the long run, this could impact them mentally when they realize they actually have no friends outside their electronic world
- 10. Are electronic devices bad for our health? As we use and grow more dependent on electronic devices, concern arises about what effect these electronic devices have on human health. Many of us are in daily contact with computers, radios, mobile cell phones, televisions, and microwave ovens. All these devices emit electromagnetic fields (EMFs), which are generated via oscillating currents. In a typical home, the EMFs can range from 0 to 5 milliwatts per meter squared. Various effects on human behavior have been reported following exposure to EMFs. For example, in transcranial magnetic stimulation, or TMS, magnetic currents are used to generate electrical currents within the brain. This stimulation leads to changes in patterns of neural activation due to the currents depolarizing the neurons; in essence, the magnetic fields are
- 11. In 1996, The World Health Organization established the International EMF Project to ascertain any link between human health and EMFs ranging from 0-300 GHz, which is the range of operation for most electrical devices. Scientific evidence has been analyzed, and so far the results are contradictory as to whether EMFs harm or otherwise affect human health. For example, some studies suggest that magnetic fields can alter human balance, pain perception, and bipolar behavior; however, the studies lack reproducibility. When attempts were made to find a link between mobile phone use and headaches, Alzheimer's disease, or brain tumors, these experiments again came up inconclusive. Nevertheless, some national advisory committees, such as those of Austria, France, Germany, and Sweden, have recommended that their citizens minimize exposure to EMFs. The recommendations have included using hands-free mobile phones to decrease exposure of the head to EMFs, keeping
- 12. At the end.. Gadgets make our life easier,enjoyable,luxarious. But excessive use is harmful.
- 13. WE ARE GRATEFUL TO OUR FRIENDS, WICKIPEDIA AND OUR DEAR TEACHER MRS. SHYANAL AND H.O.D OF OUR SCHOOL OF IT