CD-ROM

CD-ROM (an abbreviation of "Compact Disc read-only memory") is a Compact Disc that contains information accessible by a computer. While the Compact Disc format was formerly designed for music storage and playback, the format was later adapted to hold any form of binary data. CD-ROMs are commonly used to distribute computer software, including games and multimedia applications, though any data can be stored (up to the capacity limit of a disc). Some CDs seize both computer data and audio with the latter capable of being played on a CD player, whilst data (such as software or digital video) is only usable on a computer. These are called Enhanced CDs.

Although many people use lowercase letters in this acronym, proper appearance is in all capital letters with a hyphen between CD and ROM. It was also suggested by some, specially soon after the technology was first released, that CD-ROM was an acronym for "Compact Disc read-only-media", or that it was a more 'correct' definition. This was not the purpose of the original team who developed the CD-ROM, and common acceptance of the 'memory' definition is now almost universal. This is probably in no small part due to the prevalent use of other 'ROM' acronyms such as Flash-ROMs and EEPROMs where 'memory' is the correct term.

Contempo Technology Events Photos Celebrations Funs: Contempo Technology Photos

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Contempo Tech Photos 2008

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How do wireless networks work?

As the name suggests, wireless networks, sometimes called WiFi, allow you to connect to the internet without relying on wires. If your home, office, airport, or even local coffee shop has a wireless connection, you can access the network from anywhere that is within that wireless area.

Wireless networks rely on radio waves rather than wires to connect computers to the internet. A transmitter, known as a wireless access point or gateway, is wired into an internet connection. This provides a "hotspot" that transmits the connectivity over radio waves. Hotspots have identifying information, including an item called an SSID (service set identifier), that allow computers to locate them. Computers that have a wireless card and have permission to access the wireless frequency can take advantage of the network connection. Some computers may automatically identify open wireless networks in a given area, while others may require that you locate and manually enter information such as the SSID.

P2P File-Sharing Quick Facts

Peer-to-peer (P2P) file-sharing allows users to share files online through an informal network of computers running the same software. File-sharing can give you access to a wealth of information, but it also has a number of risks. You could download copyright-protected material, pornography, or viruses without meaning to. Or you could mistakenly allow other people to copy files you don’t mean to share.

If you’re considering P2P file-sharing:

* Install file-sharing software carefully, so that you know what’s being shared. Changes you make to the default settings of the “save” or “shared” folder might cause you to share folders and subfolders you don’t want to share. Check the proper settings so that other users of the file-sharing network won’t have access to your private files, folders, or sub-folders.
* Use a security program from a vendor you know and trust; keep that software and your operating system up-to-date. Some file-sharing software may install malware or adware, and some files may include unwanted content.
* You may want to adjust the file-sharing program’s controls so that it is not connected to the P2P network all the time. Some file-sharing programs automatically open every time you turn on your computer and continue to operate even when you “close” them.
* Consider setting up separate user accounts, in addition to the administrator’s account, if your computer has multiple users. Limiting rights on user accounts may help protect your computer from unwanted software and your data from unwelcome sharing.
* Back up data you don’t want to lose in case of a computer crash, and use a password to protect any files that contain sensitive information.

Acoustic Neuroma

Also called: Acoustic neurilemoma, Acoustic neurinoma, Vestibular schwannoma

Acoustic neuroma is a non-cancerous tumor that develops on the nerve that connects the ear to the brain. The tumor usually grows slowly. As it grows, it presses against the hearing and balance nerves. At first, you may have no symptoms or mild symptoms. They can include

* Loss of hearing on one side
* Ringing in ears
* Dizziness and balance problems

Acoustic neuroma can be difficult to diagnose, because the symptoms are similar to those of middle ear problems. Ear exams, hearing tests and scans can show if you have it.

If the tumor stays small, you may only need to have it checked regularly. If you do need treatment, surgery and radiation are options. If the tumors affect both hearing nerves, it is often because of a genetic disorder called neurofibromatosis. The tumor can also eventually cause numbness or paralysis of the face. If it grows large enough, it can press against the brain, becoming life-threatening.

power

Mobile phones are generally obtaining power from batteries which can be recharged from mains power source. previously, the most common form of mobile phone batteries were nickel metal-hydride, as they have a low size and weight. Sometimes lithium-Ion batteries are used, as they are lighter and do not have the voltage depression that nickel metal-hydride batteries do. Many mobile phone manufacturers have now changed to using lithium-Polymer batteries as to oppose the older Lithium-Ion, the main advantages of this being even lower weight and the possibility to make the battery a shape other than strict cuboid. Mobile phone manufacturers have been experimenting with alternate power sources, including solar cells etc….

In addition to the battery, most cellphones require a small microchip, called a SIM Card, to operate.. Approximately the size of a one-cent postage stamp, the SIM Card is installed underneath the battery in the rear of the unit, and stores the phone's configuration data, and information about the phone itself, such as which calling plan the subscriber is using. When the subscriber removes the SIM Card, it can be re-inserted into another phone and used as normal this can be done easily..

Each SIM Card is activated by a unique numerical identifier ; once activated, that identifier is locked down and the card is permanently locked in to the activating network. Sim cards plays a major role in the mobile phones….

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.

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.

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.

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.