Cellular phone

Cellular ebonite Cellular phones Cellular plastics Cellular polyethylene Cellular polymers... 

Efforts to commercialize larger versions of rechargeable lithium cells have been fmstrated by concerns over product safety. MoH Energy Ltd. briefly introduced "AA" Li—M0S2 cells for OEM use in laptop computers and cellular phones. However, safety issues resulted in a product recall and a halt to commercialization of this product. 

Fire Command, December 1987, "Cellular Phone Access to Chemical Databases," by Keith T. Lindernian. 

Manufacturers often feel compelled to be very vague about how well a battery will perform because of the uncertainty about how the batteiy will be used. Technology manufacturers invest heavily m marketing research before deciding what type of batteiy to provide with a new product. Sometimes it is a clear-cut decision other times there is no one best choice for all potential users. Perhaps the most important issue is whether a product will be used continuously or intermittently. For instance, selecting a battery for a DVD player is much easier than a cellular phone. The DVD player is likely to be used continuously by... 

Another reason for choosing the automobile is its development as a mobile office. Cellular phones, laptop computers, and satellite linkups to hand-held conmiiinication devices—all of which arc getting smaller and smaller—have made it possible to be more productive from the roadways. 

A battery stores electric energy. Although the concentration of energy is small compared, for example to gasoline, we see a myriad of uses of batteries in radios, cellular phones, flashlights, computers, watches, and so on. The public s demand for these portable products is ever increasing, and scientists strive to develop lighter and better batteries. 

Since nickel-metal hydride batteries were commercialized in 1990, they have become increasingly popular as a power source for computers, cellular phones, electric shavers, and other products. 

Lower current-rate portable and cellular phones and pagers... 

Figure 9. In a Motorola-type cellular phone handset, the six AA cells in series are protected by reversal-limiting diodes, and the overflow at 1.7 V is determined by the six red LEDs [38],...

Cadmium presents an environmental risk. Since small nickel-cadmium cells are often not separately disposed of, they may enter municipal garbage incinerators. The search for alternative materials for the negative electrode led to metal hydrides, which not only are regarded as environmentally less critical, but also allow higher energy density than cadmium. This is especially important for use in portable equipment, such as cellular phones or lap-... 

Plastic ease of processing with low cost have given them a wide application in solving problems in electronic packaging. They range from inexpensive consumer devices to sophisticated expensive computer systems and cellular phones. 

Why Do We Need to Know This Material The existence of compounds is central to the science of chemistry and by seeing how bonds form between atoms, we come to see how chemists design new materials. Research into artificial blood, new pharmaceuticals, agricultural chemicals, and the polymers used in materials such as compact discs, cellular phones, and synthetic fibers is based on an understanding of how atoms link together. 

Piezoelectric fans are small, low-power, relatively low-noise, solid-state devices that provide viable thermal management solutions for a variety of portable electronic appliances, including laptop computers and cellular phones. In these fans piezoceramic patches are bonded onto thin, low-frequency flexible blades driven at resonance frequency, thereby creating an air stream directed at the electronics components. Thereby, up to 100% improvement over natural convective heat transfer can be achieved (Acikalin et al. 2004). 

Recently, there has been considerable interest in soft-touch materials composed of thermoplastic and mbber blends. These materials when over-molded on hard or stiff stmctures such as hand tools, domestic appliances, writing gadgets, cellular phones, photographic equipments, etc. provide soft and comfortable feeling to the hand. 

Every year in the United States, billions of batteries are bought, used, and thrown out. In 1998 alone, over 3 billion industrial and household batteries were sold. The demand for batteries can be traced largely to the rapid increase in automobiles, cordless, portable products such as cellular phones, video cameras, laptop computers, and battery-powered tools and toys. 

Camcorders, computers, portable radios, and tape players, cellular phones, lawn mower starters, etc. 

Other examples of possible damaging effects of radio frequency MFs on humans are the MF effects on cellular phones. Moustafa et al. [216] suggested that acute exposure to the MFs of commercially available cellular phones for 1, 2, or 4 h significantly increased plasma lipid peroxidation and decreased the activities of SOD and glutathione peroxidase in erythrocytes. 

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