Efficient energy use

system determine the performance: the user, who produces the energy for propulsion, the vehicle mechanics of the wheelchair, which determine power requirements to move forward or backward, and the wheelchair-user interaction, which determines the efficiency of the power or force transfer from the user to the wheelchair (Woude, 2001). Propulsion technique is highly dependent upon the type of wheelchair used…

2008). Primarily used for shelf-life extension, sachets are highly effective and can reduce moisture, oxygen, ethylene and CO2 levels in a package to as low as to ppm levels. However, when dealing with food, scavenging sachets must be safe, easily to use, should not come in direct contact with the food material, compact in size and must not produce toxic substances or offensive odors/gases (Smith et al., 1995). They also must absorb a large amount of targeted substance (e.g. oxygen, ethylene…

The efficient market hypothesis (EMH) is widely used to analyse the financial market and security prices. The EMH is efficient if public information is totally reflected by asset prices (Malkiel, 2003, p.59). Malkiel (2003, p.59) implies that information of stock market was exactly shown by security market. In the last ten years, the EMH had significant effect on the financial market. This essay aims to show the three main types of the EMH and analyses if the EMH works in the real market economy…

Tribological behavior of double-glow plasma Zirconium-Yttrium alloying on γ-TiAl Cong Huang, Pingze Zhang*, Dongbo Wei, Xiangfei Wei, Xiaohu Chen and Feng Ding (College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China) * Corresponding author: pzzhang_nuaa@126.com Abstract: A Zr-Y alloyed layer was prepared onto the surface of γ-TiAl using double-glow plasma surface alloying technique (DG technique). The results showed that the Zr-Y…

Today, one of the biggest concerns when it comes to the environment and economy is the use of automobiles and the fuels that they burn. With the rise of gas prices, new fuel efficiency standards, and the ever-present concern of global warming and its’ effect on the planet, automobile efficiency, it seems, is more important than ever. A lot of energy goes into making a car run. First, the electrical energy…

Schramski’s article, the analogy of an “Earth-space battery” was used to explain the future of energy for the planet Earth in relation to mankind. This was used to explain how millions of years ago the production of biomass was created and gradually “charged” this battery. Due to recent circumstances, the battery is being drained at a rate much greater than being charged. In other words, the consumption of energy by mankind has increased drastically as a result of the need to develop society and…

founded on energy. Life without energy would mean life without movement, light, and also sound; in other words it would be impossible. Not a second goes by where energy is not present. When the sun is out, it emits light and heat, both forms of energy. When it is not out street lights are turned on using electricity, another form of energy. Stored energy can be found within the fuel tank of a car, similarly it can be found within all the undigested food in the stomach. Just as energy can be…

Solar Energy The sun is the most abundant energy source available and used on Earth, hands down. The problem is, much of the energy from the sun that is used on Earth is used by primary producers, not by us, and what they do use is an incredibly small compared to the 89,300 TW retained on Earth at any instant. What we use is smaller still (22). The first step in harnessing the awesome potential our very own star is understanding just how to do that. Think of the inside of a solar cell, the…

Discuss the relationship between energy and society. The principle question to ask when examining the relationship between energy and society is whether society drive changes in energy or energy stimulates societal change. The most common answer is that as society innovates and grows more forms of energy are harnessed and so our use of energy changes. However, at a more fundamental level, every major change in human history has been caused by the availability of energy in its various forms. The…

Introduction The purpose of this lab is to find the most efficient way to capture energy from a combusted chip using a calorimeter. We made a basic calorimeter by using a steel can. Through out our lab we made modifications to the calorimeter to increase the percent of energy captured by the water. Literature Review Kinetic energy is the energy of motion. The kinetic energy of an object is energy that is being used. Potential energy is stored energy that it is not in motion, but has…