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Mobile Phone Books

Mobile Phone Books

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Software repair of cell phones. Sotnikov S.A., 2006.

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The proposed book is unique in its kind - it has no analogues not only in Russia, but also in the CIS and Baltic countries. The manual contains materials on programming more than 200 cell phone models of SIEMENS, MOTOROLA, NOKIA and LG brands. In addition to describing the methodology for programming phones using the most common software tools, the book provides diagrams of interface cables (DATA cables), various types of programmer boxes, as well as the pin assignment of phone system connectors. For some models, descriptions of test modes are given, characteristic defects of the devices and their elimination are considered. The book provides all the necessary initial information on the architecture of the considered phone models, the distribution of their memory and other hardware features. Due to this, it can be used as a teaching aid in the training of cell phone repair specialists.

Link to download the e-book
Software repair of cell phones. Sotnikov S.A., 2006: download from depositfiles.com

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Dynamic heads using bamboo and opal analogue 09.03.2014

Panasonic announced the creation of a new dynamic head, the diaphragm of which is made of a material using the so-called "plant opals" - phytoliths, microscopic fragments of amorphous silicon dioxide (SiO2 nH2O), which accumulate during the life of bamboo and many other plants and fungi.

The material has a hardness of 5-6,5 on the Mohs scale, which corresponds to such a mineral as opal (see photo below). Basically, opal has the same chemical formula. The size of phytoliths can be from several hundred micrometers to several micrometers.

In the manufacture of diffusers, in addition to directly phytoliths, bamboo fibers, bamboo charcoal and resin are also used. Thanks to the use of phytoliths, the developers were able to achieve an increase in acoustic velocity by 10%, flexural elasticity by 40% and a decrease in internal loss by 20%. The comparison was made with other Panasonic products made with bamboo materials, but without the addition of phytoliths.

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