A Day in the life of a Aerospace Engineer
“I’m a rocket scientist,” one of our survey respondents wrote in a sentiment echoed by many others; “who wants anything more?” Aerospace engineers examine, analyze, design, produce, and occasionally install components that make up aircraft, spacecraft, high-altitude vehicles, and high-altitude delivery systems (missiles). Satisfaction with the romantic image of rocket-building can buoy many engineers through the highly anonymous work environments that ...
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- 8 queens problem
Find all solutions to the Eight Queens problem using more general sequences
and depth-first search.
structure AQueens =
structure Seq = ImpSeq
fun upto (m,n) = if m>n then  else m :: upto (m+1,n)
fun x mem ys = string.exists (fn y => y=x) ys
fun secr f y x = f(x,y)
fun depthFirst next x =
let fun dfs  = Seq.nill
| dfs (y::ys) = Seq.cons(y, fn()=> dfs (next y @ ys))
in dfs [x]
fun safeQueen oldqs newq =...
- Alternative energy source: Geothermal.
Are you worried about how you are going to keep your family warm during the winter, when money is getting tight? Well don’t worry anymore. There is an old classic look at alternative energy source other than coal-powered. It’s called geothermal energy. In literal translation “geo” means earth and “thermal” means heat. The very ground we walk on has stored heat. At the center of the earth, 4000 miles beneath us, is hot magma. We call this the core of the earth. Now obviously the farther w...
- alternative energy
FuelCell Energy , Inc. (Nasdaq:FCEL), a leading manufacturer of high efficiency ultra-clean power plants using renewable and other fuels for commercial, industrial, government, and utility customers, today reported results and accomplishments for its first quarter ended January 31, 2010.
FuelCell Energy reported total revenues for the first quarter of 2010 of $14.6 million compared to $21.7 million in the same period last year. Product sales and revenues in the first qu...
- Software Development Process
A software development process describes an approach to building, deploying and maintaining software. There are several models of this process, which describe approaches to the elements of division in the process of software development. Huge amount of organizations, which develop the software, use the different methodologies of producing. The process of searching of the repetitive and expectable processes, which increase the productiveness and quality of the products, have been lasting duri...
- mobile computing
The fundamental purpose of this paper is to illustrate that mobile computing is a versatile and potentially strategic technology. It has fast become an important new prototype in today’s world of networked computing systems. Ranging from wireless laptops to Bluetooth enabled Personal Digital Assistants (PDA’s), mobile computing has become universal in its impact on our daily lives.
According to Aranda, mobile computing is defined as the ability to use technology that is not physically conne...
- TREATMENT OF OIL CONTAMINATED SOILS IN THE NIGER DELTA USING MOBILE THERMAL DESORPTION SYSTEMS
THE OIL AND GAS PRODUCING ACTIVITIES IN THE NIGER DELTA FREQUENTLY RESULT IN SPILLS OF LARGE QUANTITIES OF CRUDE OIL IN THE ENVIRONMENT.
THESE SPILLS TEND TO RAPIDLY SPREAD DUE TO THE CLIMATE AND THE POROUS NATURE OF THE SOIL IN THE REGION. A NUMBER OF SPILL SITES EXIST WHICH ARE OVER 1 SQUARE KILOMETER IN AREA AND SEVERAL YEARS OLD.
CURRENT TREATMENT OF SUCH SPILLS IS USUALLY A COMBINATION OF MOP-UP AND OPEN BURNING. THIS LEAVES A SCORCHED AREA FROM WHICH OIL OOZES OUT DURING THE HOT DAYTIME ...
Ryoma Echizen, a tennis prodigy, attends Seishun Academy ,or Seigaku for short, a private school famous for its strong tennis club and talented players. Ryoma quickly defeats numerous upperclassmen shortly after entrance, to secure himself a spot as one of the team's regulars. In pursuit of their ultimate goal of winning the all-Japan junior high tennis championship, members of the team make new friends while learning and mastering increasingly complex techniques.Ryoma Echizen, a tennis prodigy,...
- Wind Energy
For many centuries wind has been used as a reliable source of energy. It is
clean and inexhaustible. Wind is used to make the job of a human simpliar. It is
used for grinding grain, pumping water, and to enable sail boats to move. Though
often the amount of wind power varies depending on the climate of an area.
Although wind power is only used in selected areas the recent interest in fuel
conservation has sparked the development of windfarms. In the 1980’s a studied
Autism is a developmental disability of the brain, much like dyslexia or attention deficit disorder. Autism is not a form of mental retardation, and though many autistic people act like they are retarded, but a lot of times they are very intelligent. The Autism society of America quotes "autism...occurs in approximately 15 of every 10,000 individuals and nearly 400,000 people in the U.S. today have some form of autism."
The sympots of autism may vary from person to person. Auti...
There are many kinds of networks, however this paper will be about networking computers. As we move further and further into the paperless society, the need for people to be connected and able to exchange data just as fast as they could by handing a paper to someone increases. This can be accomplished by having a group of computers connected by a network, so that as soon as data is entered into one computer, it can be immediately accessed by someone else on a connected comput...
- Air Resistance, Tyres And Friction
Air Resistance, Tyres and Friction
Dragsters use a combination of large wide tyres or the rear and small narrow tyres on the front this combination is used for the following reasons:
The front wheels:
The front wheels are very narrow. This is so a minimum of air resistance or drag affects the dragster with lower drag better acceleration an in turn a better top speed can be achieved all leading to a better pass (race time).
Now lets try to understand the concept of air resista...
- The Ediacaran Fauna
The Ediacaran Fauna
Up until 1947, it was believed that the Cambrian Explosion marked the first true abundance of multicellular life. However, this was discovered to be untrue after Sir Douglas Mawson and R.C. Sprigg mistakenly came across numerous "fossil jellyfish" in the Ediacara Hills while observing what was originally believed to be sandstones belonging to the lowest strata of the Cambrian. At first, these finding were dismissed as "fortuitous inorganic markings."(AAS Biographica...
- The Gem Of Magnetic Fluids
The Gem Of Magnetic Fluids
The phenomenon of ferromagnetism is associated only with the solid state of matter; like iron, nickel, cobalt and some rare earth metals and their alloys. Thus, up to now, there is no intrinsic homogeneous fluid having ferromagnetic properties; although, theories admit the possibility of ferromagnetism in the liquid state, and suggest that there is no inherent reason why they should not exist [1-3,5]. Ferromagnetism occurs when paramagne...