Index Search Algorithm Research Articles

Protected Research Information Management Environment (PRIME) provides a secure open source data management option for clinical and scientific research

Meeting abstract The Biomedical Information Sciences Unit (BISU) of the UT-CTSI developed a secure, centralized information management system that is accessed through web applications. This system, called Slim-Prim [1,2], is mounted on an Oracle server housed within the UT-ITS and currently hosts three multi-site clinical trials and several institutional trials. In addition, Slim-Prim houses databases of clinical and laboratory information and provides a centralized location for several physician-generated surveys. In the majority of these cases users have approached the BISU and asked for assistance with their data management needs. Slim-Prim [1,2] and the BISU provide a cost effective mechanism for funded groups to handle their data management needs. However, we are also aware that many smaller groups are in desperate need of secure yet flexible database solutions; thus there is the need for a portable, secure and open source instance of Slim-Prim. To this end we have developed and released an open source instance of the Slim-Prim system under the Affero GPL v3 (http://www.gnu.org/) called “Protected Research Information Management Environment (PRIME)”. The PRIME instance is written in PHP, based on an objected-oriented programming (OOP) architecture, and JavaScript with inverted file indexing search algorithms to render the graphical user interface (GUI) (http://www.php.net/). PRIME has a user-friendly interface that is menu driven with help features that assist the user in navigating through the application. PRIME exploits the MySQL database system and allows powerful SQL queries across tasks through using fully normalized table structures (http://www. mysql.com/). It is a web-enabled application that runs on most popular browsers. It is provided to the clinical and translational science community as a free and easily customized database solution.

다중 안테나 시스템에서 양자화된 동 이득 전송 기법의 코드북 검색 복잡도 감쇄 기법

Reduced complexity codebook searching for Quantized Equal Gain Transmission(QEGT) is proposed over MIMO-OFDM systems. QEGT codebook is divided into M groups of Q index members. Each group has a representative index. At the 1st stage only the representative indices are searched then the best index is selected. At the 2nd stage the optimum index is determined only among the group of the selected representative index. This strategy reduces the overall index search algorithm comparing to the conventional methods. Monte-Carlo simulation shows that the searching complexity is reduced, but the link-level performance is still almost the same as the conventional methods when the number of transmission antennas are 3 to 7.

Reduced-complexity transmit-beamforming codebook search algorithm

A two-stage reduced-complexity index search algorithm is proposed for finding the best vector in the codebook of quantised equal gain transmission based multiple-input multiple-output arrangements. When the number of transmit antennas is more than three, the normalised complexity is halved while maintaining the same symbol error rate as the benchmark.

웹캠 : 새로운 인데스검색 알고리듬을 이용한 웹기반 원격 녹화 보안 시스템

As existing analog video surveillance systems could save and retrieve data only in a limited space within short distance, it had many constraints in developing into various application systems. However, on the back of development of the Internet and computer technologies, digital video surveillance systems can be controlled from a remote location by web browser without space limits. Moreover, data compression and management technologies with Index Search algorithm make it possible to efficiently handling, storing, and retrieving a large amount of data and further motion detection algorithm enhances a recording speed and efficiency for a practical application, that is, a practical remote recordable video surveillance system using our efficient algorithms as mentioned, called WebCam. The WebCam server system can intelligently record and save video images digitized through efficient databased management, monitor and control cameras in a remote place thought user authentication, and search logs.