CHAPTER 1 INTRODUCTION 1.1 Background Design of Experiment (DOE) was developed in early 1920’s by Sir Ronald Fisher at the Rothamsted Agriculture Field Research Station in London‚ England. DOE can be used to observe how the design factor or parameters affect the performances. DOE also used to planning‚ designing and analyzing the experiment so that the objectives can be achieved and obtain effective results. The use of DOE in experiment reduce the time and effort with the availability of modern simulation
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said she had been told that living near a phone mast could raise the cancer risk of small children and that clusters of cases around masts had been reported. Her husband‚ Adam‚ added that there could also be effects on people’s health from the electromagnetic radiation used for mobile phone signals. He said “Seeing the size of the planned structure there could be adverse effects on the environment and people living in houses out to about 1400 metres away. Silkstone resident‚ Eileen O’Connor has set
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convenient‚ but they can also be very dangerous. They emit a type of radiation called radio frequency (RF) that has been shown to damage genetic material in blood cells‚ which can cause cancer. Radio frequency energy is a form of electromagnetic radiation. Electromagnetic radiation are categorized into two type: ionizing and non-ionizing. Ionizing radiation are found in x-rays‚ cosmic rays‚ and radon. Non-ionizing radiations are found in radio frequency and extremely low-frequency or power frequency
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Silliman University is known for its quality of education and also the expensiveness of the school compare to the other school inside Negros Oriental. This is because Silliman University is a private school that does not get money from the government and that is run by a group of individuals. Silliman University has an average tuition fee of thirty-eight thousand five hundred seventy pesos (₱38‚570). This is according to the official website of the University. Base on this‚ the expensiveness of the
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the sun can be very hazardous to humans and all other living organisms. High exposure to UV radiation can cause melanomas as the UV rays can affect living organism as the molecular level. It has a frequency of 10^(-8) Just like most forms of electromagnetic radiations‚ the main source of natural ultraviolet radiation are the stars‚ including our sun. Most of the ultraviolet radiation that strikes the sun is form the sun. The action of ultraviolet rays on oxygen in our atmosphere creates layer about
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an autism spectrum disorder (autism speaks 2014). Autism spectrum disorder (ASD) is a general term for a group of complex disorders that affect neurodevelopment. Social skills deficits are one of the three core impairments found in children with Autism Spectrum Disorders (ASDs) and are often considered to be the primary feature of ASDs (Kanner‚ 1943; Sevin‚ Knight‚ & Braud‚ 2007; Volkmar‚ Cohen‚ Bregman‚ Hooks‚ & Stevenson‚ 1989; Walters‚ Barrett‚ & Feinstein‚ 1990). The term “spectrum” from the
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HOW SATELLITE BENEFITS SOCIETY Satellites are used almost everyday by everyone. Even though you can’t see it‚ there will probably be one traveling above you today. Satellites are used for many things such as communication‚ oceanography‚ astronomy‚ surveillance‚ and a variety of other things as well . They help many scientists get a perceptive view at all kinds of objects anywhere in the world. Communications Communication satellites work non-stop 24 hours a day to keep the entire world
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loneliness and perceived social support. 39 adolescent boys with autism spectrum disorders (ASD) were examined for Loneliness and perceived social support. Twenty-one percent of the boys with ASD described themselves as often feeling lonely‚ Compared to the 199 boys‚ from regular schools in the study. ASD was strongly with a higher degree of loneliness & negatively perceived there support from
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Intense terahertz antenna array with interdigital electrodes Lei Hou‚ Wei Shi*‚ Ming Xu‚ Yong Chen Department of applied physics‚ Xi’an University of Technology‚ Shaanxi‚ China‚ 710048 ABSTRACT In this work a powerful terahertz antenna array with interdigital electrodes is fabricated‚ and the performance of one antenna unit is compared with a conventional resonant dipole antenna. The antenna unit has a better capacity of generating THz wave compared with a conventional resonant dipole antenna
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Electromagnetic energy‚ in the form of light‚ travels in wavelengths and is measured in nanometres (nm). Pigments within matter‚ such as plants‚ absorb varying wavelengths of light. The absorption spectrum can be defined as a graphical representation of a pigment’s ability to absorb light against varying wavelengths (nm). The pigments light absorbing ability is measured using a spectrophotometer. An action spectrum can be defined as the graphical representation of the rate of photosynthesis against
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