Abstract: A method of obtaining accurately a heat-dissipating requirement for electronic systems of a same kind uses a thermal analysis software, a passed thermal module with a fan, and a fan speed regulating device. The method includes steps of: (1) connecting the fan to the fan speed regulating device; (2) turning on one electronic system and running the fan, monitoring the electronic system; (3) reducing the speed of the fan until the electronic system is shut down, recording the fan speed; (4) getting a thermal resistance (Ri) of the thermal module when it runs in an open space with the fan running at the speed at which the electronic system is shut down; (5) repeating above four steps to get some Ri's of some other such electronic systems; (6) using the thermal analysis software to analyze the Ri's of the electronic systems and getting accurately the heat-dissipating requirement for the electronic systems.

Abstract: A heat dissipating device includes a circuit board (23), an electronic component (24) being arranged on the circuit board, a base (211) being thermally attached to the electronic component, and a plurality of fasteners (22). The circuit board defines a plurality of screw holes (230) therein. The base defines a plurality of through holes (213) corresponding to the screw holes of the circuit board. Each fastener includes a bolt (27) extending through a corresponding through hole of the base and then threadly engaging into a corresponding screw hole of the circuit board, and a coil spring (28) mounted around the bolt. The base forms a plurality of latch hooks (214) near each through hole. A bottom ring (222) of the coil spring is sandwiched between the latch hooks and the base.

Abstract: A dual channel band-pass filter (10) includes an input portion (100), a first resonator (140), a second resonator (160), and an output portion (120). The input portion is used for inputting electromagnetic signals. The first resonator is electronically connected to the input portion, and includes a first groove (146) in the vicinity of a center thereof. The second resonator is disposed parallel to the first resonator, and includes a second groove (166) in the vicinity of a center thereof. The output portion is disposed parallel to the input portion, and is electronically connected to the second resonator for outputting electromagnetic signals.

Abstract: A dual BIOS circuit includes a first BIOS chip, a second BIOS chip, a power supply, and a switch. The first BIOS chip is connected to a Southbridge chip of a motherboard via a bus. The second BIOS chip is connected to the Southbridge chip of a motherboard via another bus. The power supply is connected to signal pin of the Southbridge chip. The switch includes a handle. The first terminal of the switch is connected to the a detecting pin of the Southbridge chip. The second terminal of the switch is connected to the power supply. The third terminal of the switch is grounded. The first or second BIOS chip is selected to operate according to the voltage level at the detecting pin of the Southbridge chip.

Abstract: A dual BIOS circuit includes a first BIOS chip, a second BIOS chip, and a transistor. The first and the second BIOS chip include a setup program configured for setting the voltage of a GPIO pin of a Southbridge chip. The first and the second BIOS chip are connected to the Southbridge chip. The gate of the transistor is connected to the GPIO pin of the Southbridge chip. The drain of the transistor is connected to a power supply via a resistor, and connected to a detecting pin of the Southbridge chip. The source of the transistor is grounded. The power supply is connected to a signal pin of the Southbridge chip. The first or second BIOS chip is selected to operate according to the voltage level at the detecting pin of the Southbridge chip.

Abstract: A wireless communication device (10) includes an antenna (12), an electronic element (14), and a support member (18). The antenna for radiating and receiving electromagnetic signals is disposed on one side of the electronic element. The support member includes at least one support portion disposed between the antenna and the electronic element to form a space for spacing the antenna and the electronic element to enhance the radiation efficiency of the antenna.

Abstract: A printed antenna includes a radiation part (10) for radiating and receiving electromagnetic signals, a feed wire (30) for feeding the electromagnetic signals to the radiation part, a matching part (20) for impedance matching, and a ground plane (40). The radiation part includes a first radiation segment (12), a second radiation segment (14), and a third radiation segment (16). The second radiation segment is electrically connected to the first radiation segment and the third radiation segment. The feed wire is electrically connected to the radiation part. The matching part is electrically connected to the radiation part and the ground plane. The second radiation segment and the matching part extend from the first radiation segment to a same side of the first radiation segment.

Abstract: A heat dissipation device includes a heat pipe having a condenser section and a layer of solid-state solder film on an exterior surface of the condenser section, a heat sink having a plurality of spaced fins, each of which has an aperture. The condenser section of the heat pipe fits into the apertures of the fins. The heat sink with the condensing section received therein is heated and the solid-state solder film melts, filling gaps between the heat pipe and the fins. A method of assembling the device is also provided.

Abstract: An antenna (100) disposed on a first substrate (10) and a second substrate (20) includes a feeding portion (110) and a radiating portion (120). The feeding portion (110) is disposed on a first surface of the first substrate (10), for feeding electromagnetic signals. The radiating portion (120) connected to the feeding portion (110) for transceiving electromagnetic signals includes a first radiator (121), a second radiator (122) and a third radiator (123). The first radiator (121) is disposed on the first surface and connected to the feeding portion (110). The second radiator (122) is disposed on a second surface of the second substrate (20). The third radiator (123) includes a first cylinder portion (1231) and a second cylinder portion (1232) connected to the first cylinder portion (1231). The first cylinder portion (1231) and the second cylinder portion (1232) are connected to the first radiator (121) and the second radiator (122), respectively.

Abstract: A method of erasing an erasable disc. When an optical drive is erasing a DVD-RW disc, a write mode, instead of a conventional erase mode, is used to execute an erase operation. In the write mode, the invention sets current values of individual current paths in a laser diode drive circuit such that a laser diode always outputs a constant erase power (Pe) onto the DVD-RW disc-no matter how a write pulse signal changes. Thus, after a starting position of the DVD-RW disc is determined, the optical drive only needs to write a data amount of n ECC blocks to complete the disc erasing operation without continuously detecting the LPP (Land Pre-Pit) data block to obtain a stop erasing position on the disc in the conventional optical drive.

Abstract: A dual-band filter (10) is provided. The dual-band filter includes an input line (100), a first transmission line (140), a second transmission line (160), a third transmission line (180), and an output line (120). The input line is used for inputting electromagnetic signals. The first transmission line is electronically connected to the input line. The second transmission line is arranged parallel to the first transmission line. The third transmission line is arranged between, and parallel to, the first transmission line and the second transmission line. The output line for outputting electromagnetic signals, is arranged parallel to the input line, and is electronically connected to the second transmission line.

Abstract: A low-pass filter (100) for reducing harmonic electromagnetic signals includes an input line (120), an output line (140), a transmission line (160), a first coupling line (180), and a second coupling line (190). The input line is used for input of electromagnetic signals. The output line is used for output of electromagnetic signals. The transmission line is electronically connected to the input line and the output line for capturing and transmitting electromagnetic signals. The first coupling line includes a first open end (184), and a first feed-in end (182) electronically connected to the transmission line. The second coupling line includes a second open end (194), and a second feed-in end (192) electronically connected to the second end. The first feed-in end is located opposite to the second feed-in end. The transmission line, the first coupling line, and the second coupling line collectively form a substantially G shape.

Abstract: An inner ring signal and an outer ring signal according to specific patterns formed on the label side of the optical disc are generated. Timing starts when the outer ring signal reveals the end of a positioning pattern and stops to obtain a timing value when the inner ring signal reveals the start of a square wave defining a specified spoke. A starting spoke is defined according to the inner ring signal and the specified spoke. A deviation bit value is calculated according to the timing value and a bit number of a data to be marked on a certain track of the optical disc. The data is rotated according to the deviation bit value, and then marked on the certain track, starting with the starting spoke.

Abstract: A planar antenna (10) is disposed on a substrate (20). The planar antenna includes a grounding portion (12), a radiating body (16), a feeding portion (14), and a matching portion (18). The grounding portion is disposed on one surface of the substrate. The radiating body includes a first radiating portion (161), a second radiating portion (162), a third radiating portion (163), a fourth radiating portion (164), and a fifth radiating portion (165), which are perpendicularly connected one by one and extend according to a generally clockwise pattern. The feeding portion configured neighboring the grounding portion is electronically connected to the radiating body, for feeding electromagnetic signals to the radiating body. The matching portion is electronically connected to the grounding portion, as well as to the radiating body and the feeding portion.

Abstract: This invention relates to photochromic filaments composed of the lithium salt of a conjugated, polymerizable polyacetylene having a carboxylic acid or carboxylate terminal group wherein the length to width ratio of said filaments is between about 5000:1 and about 5:1 and the average length of the filament is up to about 5 cm. The invention also pertains to the use of said salts in maximized radiation sensitivity for imaging, radiation dose measurement or mapping and detection of radiation fields.

Abstract: A printed antenna disposed on a substrate, includes a radiation part, a feed line, and at least one first ground part. The radiation part is for radiating and receiving electromagnetic signals, and includes a hollow portion and a pair of openings. The hollow portion is defined in the radiation part, and comprises a first slot connected to a second slot, which is connected to a third slot, wherein the second slot extends between the first slot and the third slot forming a substantially h-shaped pattern. The openings are formed at two edges of the radiation part. The feed line for feeding the electromagnetic signals to the radiation part is electrically connected to the radiation part. The at least one first ground part for grounding is disposed at one side of the feed line.

Abstract: An ultra-wideband (UWB) antenna (10), disposed on a substrate (30), includes a body (100), a feeding part (160), and at least one first ground plane (120). The body, for receiving and transmitting electromagnetic signals, includes a first radiating part (102) and a second radiating part (104) connected to the first radiating part. The body defines a gap (106) between the first radiating part and the second radiating part. The feeding line, electrically connected to the body, feeds electromagnetic signals to the body. The at least one first ground plane is disposed on a side of the feeding part, and is grounded.

Abstract: A band-pass filter (10) for reducing harmonic electromagnetic signals includes an input line (100), an output line (120), at least one first resonator (140), and at least one second resonator (160). The input line inputs electromagnetic signals. The output line outputs electromagnetic signals. The first resonator includes a first grounded end (141), electronically connected to the input line, and a first open end (142). The second resonator is disposed parallel to the first resonator. The second resonator includes a second grounded end (161), electronically connected to the output line, and a second open end (162). The first grounded end is disposed in the same direction as the second grounded end, and the first open end is disposed in the same direction as the second open end.

Abstract: A dual-band antenna (10) is provided. The dual-band antenna printed on a substrate (30) includes a transmission portion (120), a first radiator (140), a second radiator (160), a first grounded portion (180), and a second grounded portion (190). The transmission portion is used for feeding electromagnetic signals. The first radiator is electronically connected to the transmission portion for transceiving electromagnetic signals with a first frequency. The second radiator is electronically connected to the transmission portion for transceiving electromagnetic signals with a second frequency. The first grounded portion is disposed on a first surface of the substrate. The second grounded portion is disposed on a second surface of the substrate. A length of the second grounded portion is greater than that of the first grounded portion. An antenna assembly is also provided in the present invention.

Abstract: A system and method for managing optical power for controlling thermal alteration of a sample undergoing spectroscopic analysis is provided. The system includes a moveable laser beam generator for irradiating the sample and a beam shaping device for moving and shaping the laser beam to prevent thermal overload or build up in the sample. The moveable laser beam generator includes at least one beam shaping device selected from the group consisting of at least one optical lens, at least one optical diffractor, at least one optical path difference modulator, at least one moveable mirror, at least one Micro-Electro-Mechanical Systems (MEMS) integrated circuit (IC), and/or a liquid droplet. The system also includes an at least two degree of freedom (2 DOF) moveable substrate platform and a controller for controlling the laser beam generator and the substrate platform, and for analyzing light reflected from the sample.