Sunday, March 23, 2008

A Mobile Game

A mobile game is a video game has fun on a mobile phone, Smartphone, PDA, handheld computer or any type of handheld or wireless device.

Mobile games are played using the technologies current on the device itself. For networked games, there are different technologies in common use. Examples contain text message (SMS), multimedia message (MMS) or GPRS location identification.

However, there are non networked applications, which simply use the machine platform to run the game software. The games may be installed over the air, they may be side loaded onto the receiver with a cable, or they may be embedded on the handheld devices by the OEM or by the mobile operator.

Mobile games are generally downloaded via the mobile operator's radio network, but in some cases are also loaded into the mobile handsets when purchased, or via infrared connection, Bluetooth or memory card.

Sunday, March 16, 2008

Household Electric Fan

A mechanical fan is a device used to create an airflow for the purpose of creature comfort, ventilation, exhaust, or any other gaseous transport.

Mechanically, a fan can be any rotating vane or vanes used for producing currents of air. Fans produce air flows with high volume and low pressure, as opposed to a gas compressor which creates high pressures at a comparatively low volume. A fan blade will often rotate when exposed to an air stream, and devices that take advantage of this, such as anemometers and wind turbines often have designs alike to that of a fan.

Typical applications contain climate control, cooling systems, personal comfort (e.g., an electric table fan), ventilation (e.g., an exhaust fan), winnowing (e.g., separating chaff of cereal grains), removing dust (e.g. sucking as in a vacuum cleaner), drying (usually in addition to heat) and to provide draft for a fire. It is also general to use electric fans as air fresheners, by attaching fabric softener sheets to the protective housing. This causes the fragrance to be carried into the immediate air.

In addition to their utilitarian function, vintage or antique fans, and in exacting electric fans manufactured from the late 1800s through the 1950s, have become a recognized collectible category, and in the U.S.A. an active collector club, the Antique Fan Collectors Association, supports the hobby.

Sunday, March 09, 2008

Origin of ice age theory

The plan that, in the past, glaciers had been far more extensive was folk knowledge in some alpine regions of Europe (Imbrie and Imbrie, p25, quote a woodcutter telling de Charpentier of the former extent of the Swiss Grimsel glacier). No single person imaginary the idea. Between 1825 and 1833, Jean de Charpentier assembled proof in support of this idea. In 1836 Charpentier influenced Louis Agassiz of the theory, and Agassiz published it in his book Étude sur les glaciers of 1840.

At this early stage of knowledge, what were being studied were the glacial periods within the past few hundred thousand years, during the present ice age. The far previous ice ages' very existence was unsuspected.

Monday, March 03, 2008

History Of Natural Science

Prior to the 17th century, the objective study of nature was called as natural philosophy. Over the next two centuries, however, a philosophical interpretation of nature was gradually changed by a scientific approach using inductive methodology. The works of Sir Francis Bacon popularized this approach, thereby helping to create the scientific revolution.

By the 19th century the study of science had come into the purview of professionals and institutions, and in so doing it gradually acquired the more recent name of natural science. The term scientist was coined by William Whewell in an 1834 evaluation of Mary Somerville's On the Connexion of the Sciences. However the word did not enter general use until nearly the end of the same century.