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534 articles for “NP-hard”
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Research ArticleOpen accessIn the abstractPerformance Analysis of a 32-Bit Multiplier with a Carry-Look-Ahead Adder and a 32-bit Multiplier with a Ripple Adder using VHDLHasan Krad, Aws Y. Al-TaieThis study presents a performance analysis of two different multipliers for unsigned data, one uses a carry-look-ahead adder and the second one uses a ripple adder. The study's main focus is on the speed of the multiplication operation on these 32-bit multipliers which are modeled using VHDL, A hardware description language. The multiplier with a carry-look-ahead adder has shown a … …Journal of Computer Science, Vol. 4, Issue 4 · 30 Apr 2008 · 7,391 accessesView PDFCite
Research ArticleOpen accessIn the abstractOperating System Support for Wireless Sensor NetworksAnt A. Fröhlich, Lucas F. WannerIn a wireless sensor network, several sensor nodes obtain local data and communicate among themselves in order to create a global vision of an object of study. The idea of a self-managed network of low-power, autonomous devices, that collects data from an environment and propagates information through a wireless link brought about several new challenges and requirements in application run-time … …Journal of Computer Science, Vol. 4, Issue 4 · 30 Apr 2008 · 7,385 accessesView PDFCite
Research ArticleOpen accessIn the abstractDesign and Development of Broadband Inverted E-shaped Patch Microstrip Array Antenna For 3G Wireless NetworkNorbahiah Misran, Mohammad Tariqul Islam, Ng Kok JiunnMicrostrip patch antenna has been received tremendous attention since the last two decades and now it becomes a major component in the development of Smart Antenna System for Third-Generation Wireless Network proposed by the ITU-R under the banner of IMT-2000. Smart antenna consists of an array of antennas associated with it a base-band hardware and control unit (inclusive of the … …American Journal of Applied Sciences, Vol. 5, Issue 4 · 30 Apr 2008 · 7,126 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Novel Reversible BCD Adder For Nanotechnology Based SystemsMajid Haghparast, Keivan NaviThis paper proposes two reversible logic gates, HNFG and HNG. The first gate HNFG can be used as two Feynman Gates. It is suitable for a single copy of two bits with no garbage outputs. It can be used as &#34Copying Circuit&#34 to increase fan-out because fan-out is not allowed in reversible circuits. The second gate HNG can implement all … …American Journal of Applied Sciences, Vol. 5, Issue 3 · 31 Mar 2008 · 10,138 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Middleware Service for Increasing Applications Integration AvailabilityNader Mohamed, Jameela Al-JaroodiMiddleware has become an integral part of many distributed applications offering effective integration and interoperability solutions. In some situations a problem may occur where the integration of distributed information applications may be affected by scheduled unavailability of one or more of these applications. The scheduled unavailability occurs due to several reasons including application or data backup, software or hardware maintenance … …Journal of Computer Science, Vol. 4, Issue 2 · 28 Feb 2008 · 6,816 accessesView PDFCite
Research ArticleOpen accessIn the abstractMiniature-Autopilot Evaluation SystemKamal Ali, Lamarious CarterThis research describes a Hardware in the Loop Simulator (HILS) that was developed to enhance the quality of attitude data received from autopilots. The described system aided in adjusting the contribution of individual IMU sensors and thereby improved the accuracy of IMU data. The HILS system outlined in this research is a gimbaled platform equipped with four stepper motors and … …Journal of Computer Science, Vol. 4, Issue 1 · 31 Jan 2008 · 6,949 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Determinants of Urban Household Poverty in MalaysiaT. Y. Mok, C. Gan, A. SanyalSince independence in 1950s Malaysia has been recognized as one of the more successful countries in fighting poverty: head count ratio came down to 5.7% by 2004. However the recent process of rapid urbanization has led to an increase of urban poverty aggravated further by the 1997 Asian financial crisis. It is important to understand the nature and scale of … …Journal of Social Sciences, Vol. 3, Issue 4 · 31 Dec 2007 · 9,859 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Carcass Weight and Muscle on Texture, Structure, Rheological Properties and Myofibre Characteristics of Roe DeerJoanna Żochowska-Kujawska, Kazimierz Lachowicz, Małgorzata Sobczak, Leszek GajowieckiMyofibre characteristic, texture, structure and rheological properties of selected muscles (BF, SM and L) of roe deer of different carcass weight were compared. Muscle texture and rheological properties was determined with the TPA and relaxation test, respectively, performed with a Instron 1140 device. Fibre type percentage and structural elements (muscle fibre cross sectional area and perimysium thickness) were measured in … …American Journal of Animal and Veterinary Sciences, Vol. 2, Issue 4 · 31 Dec 2007 · 7,582 accessesView PDFCite
Research ArticleOpen accessIn the abstractDynamically Reconfigurable Embedded Architecture-An Alternative To Application-Specific Digital Signal Processing ArchitecturesN. Ramadass, S. Natarajan, J. Raja Paul PerinbamEmerging trends in design of real-time digital signal processing systems indicate that in the future, a significant amount of performance improvement can be achieved using dynamically reconfigurable embedded architectures consisting of reconfigurable, general-purpose components. Although embedded real-time systems have long been prevailing in our society, no firm scientific base has been established yet to handle timing requirements in a systematic … …Journal of Computer Science, Vol. 3, Issue 10 · 31 Oct 2007 · 6,735 accessesView PDFCite
Research ArticleOpen accessIn the abstractCompressibility Behavior of Tropical Peat Reinforced with Cement ColumnsYouventharan Duraisamy, Bujang B.K. Huat, Azlan A. AzizThis paper presents the compressibility of tropical peat reinforced with cylindrical cement columns. When a cement column is installed vertically in peat, its compressibility is reduced because of the hardened skeleton matrix formed by cement particles bonding with adjacent soil particles in the presence of pore water. The effects of the cement column diameter on the compressibility have been investigated … …American Journal of Applied Sciences, Vol. 4, Issue 10 · 31 Oct 2007 · 7,435 accessesView PDFCite