http://hdl.handle.net/10397/58 Search the Channel search http://repository.lib.polyu.edu.hk/jspui/simple-search http://hdl.handle.net/10397/5236 Title: Detection system for assisting a driver when driving a vehicle using a plurality of image capturing devices<br/><br/>Authors: Fong, Bernard Cheuk Mun; Siu, Wan-chi<br/><br/>Abstract: A detection system (5) for assisting a driver when driving a vehicle, the system (5) comprising: a plurality of image capturing devices (98) mounted to the vehicle to capture images of the external environment of the vehicle; an image processing module (95) to identify potential hazards in real-time from the captured images and to superimpose information of the external environment relating to the identified potential hazards; and at least one display device (92) to display images processed by the image processing module in real-time; wherein the superimposed information is provided in an area of the display device (92) to ensure visual clarity of the images of the external environment. http://hdl.handle.net/10397/5235 Title: Method and system for encoding and decoding low-density-parity-check (LDPC) codes<br/><br/>Authors: Lau, Francis Chung-ming; Tam, Wai M.; Tse, C. K. Michael<br/><br/>Abstract: An approximated lower-triangle structure for the parity-check matrix of low-density parity-check (LDPC) codes which allows linear-time-encoding complexity of the codes is disclosed, and the parity part of the parity-check matrix is semi-deterministic which allows high flexibility when designing the LDPC codes in order to provide higher error-correction capabilities than a typical dual-diagonal structure. http://hdl.handle.net/10397/5234 Title: Personal tracking device with low power consumption<br/><br/>Authors: Chow, Martin H. L.; Chung, Ching-ching Jenny; Lai, Kam-yuk Claudia; Lee, Hor-yau Carrie; Ma, Kam Wah; Mak, Diana P. S.; Wai, Ping-kong Alexander; Mak, Arthur F. T.; You, Jane; Tong, Kai-yu Raymond; Zheng, Yong-Ping<br/><br/>Abstract: An portable tracking device integrating a mobile phone module (e.g. based on GSM or 3G networks), a GPS module, a radio Beacon and ultrasonic beacon. The tracking device is normally in a hibernated state when the entire device consumes little energy and require no periodically changing or recharging batteries to power the device. It consumes power from the primary battery only when a tracking process is actually taken place. With this portable tracking device on the person who is unable to affirmatively report his or her whereabout, the remote center and/or a search team can communicate the GPS module, radio beacon and ultrasonic beacon of the tracking device via the mobile phone module based on existing wireless communication technologies, such SMS, GPRS, ect, on GSM or 3 G networks, which also serves as a means of initial rough estimation of the tracking device's location. http://hdl.handle.net/10397/5228 Title: Method and system for shortening the length of time gaps between data units in a data switching network<br/><br/>Authors: Li, Chun-Yin; Wai, Ping-kong Alexander; Li, On-Kwok Victor<br/><br/>Abstract: A method for shortening the length of time gaps between data units in a data switching network; the method comprising: arranging a group of K data units received consecutively at an input of a first device in K time units, where K is a positive integer; sending the arranged K data units to the inputs of M devices, where M is a positive integer; transferring a group of H[sub j] data units of the arranged K data units by a device j of the M devices from its inputs to its outputs within a time unit T[sub x] in the K unit time period, where H[sub j] is a positive integer and the sum of H[sub j] for j=1, . . . M is equal to K, where H[sub j]≤ K; arranging the data units sent to the devices of the M devices transferring at time unit T[sub x] such that no two inputs of the devices of the M devices transferring at time unit T[sub x] receive the same data unit at any moment; and repeatedly combining and arranging the K data units from the outputs of the M devices by a second device such that the K data units appear at the output of the second device consecutively.