Tuesday, July 1, 2008
SURFACE-CONDUCTION ELECTRON-EMITTER DISPLAY (SED)
Surface-Conduction Electron-Emitter Display (SED):
A Surface-conduction Electron-emitter Display (SED) is a flat panel display technology that uses surface conduction electron emitters for every individual display pixel. The surface conduction electron emitter emits electrons, that excite a phosphor coating on the display panel which is similar to the basic concept found in traditional cathode ray tube (CRT) televisions. This means that SEDs can combine the slim form factor of LCDs with the high contrast ratios and can also refresh rates making the picture quality of CRTs better .The researches so far claim that the SED consumes less power than the LCD displays. The surface conduction electron emitter apparatus consists of a thin slit, across which electrons tunnel when excited by moderate voltages (tens of volts).
When the electrons cross electric poles across the thin slit, some are scattered at the receiving pole and are accelerated towards the display surface by a large voltage gradient (tens of kV) between the display panel and the surface conduction electron emitter apparatus. The SED display offer brightness, color performance and viewing angles on par with CRTs. However, they do not require a deflection system for the electron beam. Engineers as a result can create a display that is just a few inches thick which is still light enough for wall-hanging designs. The manufacturer can enlarge the panel merely by increasing the number of electron emitters relative to the necessary number of pixels. Since 1987, SED technology has been developing. Canon and Toshiba are the two major companies working on SEDs.
A Surface-conduction Electron-emitter Display (SED) is a flat panel display technology that uses surface conduction electron emitters for every individual display pixel. The surface conduction electron emitter emits electrons, that excite a phosphor coating on the display panel which is similar to the basic concept found in traditional cathode ray tube (CRT) televisions. This means that SEDs can combine the slim form factor of LCDs with the high contrast ratios and can also refresh rates making the picture quality of CRTs better .The researches so far claim that the SED consumes less power than the LCD displays. The surface conduction electron emitter apparatus consists of a thin slit, across which electrons tunnel when excited by moderate voltages (tens of volts).
When the electrons cross electric poles across the thin slit, some are scattered at the receiving pole and are accelerated towards the display surface by a large voltage gradient (tens of kV) between the display panel and the surface conduction electron emitter apparatus. The SED display offer brightness, color performance and viewing angles on par with CRTs. However, they do not require a deflection system for the electron beam. Engineers as a result can create a display that is just a few inches thick which is still light enough for wall-hanging designs. The manufacturer can enlarge the panel merely by increasing the number of electron emitters relative to the necessary number of pixels. Since 1987, SED technology has been developing. Canon and Toshiba are the two major companies working on SEDs.
MAGNATORESISTIVE RAM (MRAM)
MAGNATORESISTIVE RAM (MRAM):
MRAM, the new breed of semiconductor memory uses magnetic properties to store data. This new kind of chip will compete with other established forms of semiconductor memories such as Flash memory and random access memory (RAM). Most engineers believe that the technology called magnetoresistive random - access memory (MRAM) could reduce the cost and power consumption of electronics for cell phones, music players, laptops and servers.
The feature, that makes MRAM an alluring alternative to other forms of semiconductor memories, is the way it stores data. For example, flash memory and random-access memory (RAM) hold information as electric charge. In contrast, MRAM uses the magnetic orientation of electrons to represent bits. Using MRAM, reading and writing of data can be done unlimitedly with in nanoseconds. MRAM can also hold the data without a power supply.
MRAM, the new breed of semiconductor memory uses magnetic properties to store data. This new kind of chip will compete with other established forms of semiconductor memories such as Flash memory and random access memory (RAM). Most engineers believe that the technology called magnetoresistive random - access memory (MRAM) could reduce the cost and power consumption of electronics for cell phones, music players, laptops and servers.
The feature, that makes MRAM an alluring alternative to other forms of semiconductor memories, is the way it stores data. For example, flash memory and random-access memory (RAM) hold information as electric charge. In contrast, MRAM uses the magnetic orientation of electrons to represent bits. Using MRAM, reading and writing of data can be done unlimitedly with in nanoseconds. MRAM can also hold the data without a power supply.
4G
4G:
The technology called 4G has redefined the whole concept of today’s sophisticated communication. According to the Wireless World Research Forum (WWRF), 4G is a combination of wired and wireless networks in computer, consumer electronics and communication technology systems based on the internet technology, that can merge applications like the Wi-Fi and WiMAX capable of transmitting at a speed ranging from 100 Mbps (in cell-phone networks) to 1 Gbps (in local Wi-Fi networks).
This collection of technologies and protocols delivers high quality of service at both ends and high point security. Officially named by IEEE as Beyond 3G (B3G) it provides with the lowest cost wireless network.
CELL PHONE VIRUSES AND SECURITY
CELL PHONE VIRUSES AND SECURITY:
As cell phones become a part and parcel of our life so do the threats imposed to them is also on the increase. Like the internet, today even the cell phones are going online with the technologies like the edge, GPRS etc. This online network of cell phones has exposed them to the high risks caused by malwares viruses, worms and Trojans designed for mobile phone environment. The security threat caused by these malwares are so severe that a time would soon come that the hackers could infect mobile phones with malicious software that will delete any personal data or can run up a victim’s phone bill by making toll calls.
All these can lead to overload in mobile networks, which can eventually lead them to crash and then the financial data stealing which poises risk factors for smart phones. As the mobile technology is comparatively new and still on the developing stages compared to that of internet technology, the antivirus companies along with the vendors of phones and mobile operating systems have intensified the research and development activities on this growing threat, with a more serious perspective.
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