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160 articles for “Measurement-Based”
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Research ArticleOpen accessIn the abstractModel Identification and Wall-Plug Efficiency Measurement of White LED ModulesAhmed Zurfi, Jing ZhangIn this study, an experimental method is developed to measure the Wall-Plug efficiency of white LED modules without using any apparatus or sensors to measure the intensity of light. The tested LED module consists of a white LED chip-on-board affixed on a heatsink. The proposed method is mainly based on thermal and electrical models of the LED module. Measurements of … …American Journal of Engineering and Applied Sciences, Vol. 9, Issue 2 · 15 Jun 2016 · 8,290 accessesView PDFCite
Literature ReviewOpen accessIn the abstractOnline Traffic Measurement and Analysis in Big Data: Comparative Research ReviewLena T. Ibrahim, Rosilah Hassan, Kamsuriah Ahmad et al.The Internet traffic measurement and analysis is important to avoid many problems of data transferring via online networks such as data losing and slow data transferring. The Internet traffic measuring and analysis could be effective to avoid the data transferring challenges. The Internet traffic measuring and analysis flexibility is important due to many reasons such as dynamicity of transferred data … …American Journal of Applied Sciences, Vol. 13, Issue 4 · 27 Apr 2016 · 7,711 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Six-Port Reflectometer Calibration Using Wilkinson Power DividerTraii Moubarek, Ali GharsallahA new calibration method for a six-port reflectometer which minimizes the effect of power measurement errors is presented. It is based on the power divider correlator to obtain estimates of the six-port calibration constants. The calibration procedure is to determine the constants that govern the operation of the six-port from the measurement of power or output ports tensions by placing … …American Journal of Engineering and Applied Sciences, Vol. 9, Issue 2 · 17 Mar 2016 · 7,798 accessesView PDFCite
Research ArticleOpen accessIn the abstractImproving Medical Imaging and Blood Flow Measurement by using a New Doppler Effect RelationshipFlorian Ion T. PetrescuThe Doppler Effect represents the frequency variation of the waves, received by an observer which is drawing (coming), respectively it’s removing (going), from a wave spring (source). One proposes to study the Doppler Effect for the light waves, generally for the electromagnetic waves. Doppler effect (or Doppler shift), named after Austrian physicist Christian Doppler who proposed it in 1842 in … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 4 · 14 Oct 2015 · 12,852 accessesView PDFCite
Research ArticleOpen accessIn the abstractRice Grain Moisture Determination Using Microstrip Wide-Ring and Microstrip Coupled-Line SensorsHou Kit Mun, Kok Yeow You, Mohamad Ngasri DimonDetermining the Moisture Content (MC) inside rice grain is an important element for grain processesing such as harvesting, storage, quality control and transportation. A microstrip wide-ring sensor and a microstrip coupled-line sensor with low insertion loss were developed to operate at relatively low frequency to determine the MC and relative complex permittivity of rice grain. The complex permittivity for rice … …American Journal of Applied Sciences, Vol. 12, Issue 2 · 3 Apr 2015 · 7,438 accessesView PDFCite
Research ArticleOpen accessIn the abstractPOWER STABILITY MONITORING BASED ON VOLTAGE INSTABILITY PREDICTION APPROACH THROUGH WIDE AREA SYSTEMH. H. Goh, Q. S. Chua, S. W. Lee et al.Nowadays, power systems are being forced to operate closer to its security limit due to current economic growth and the difficulties to upgrade the existing grid infrastructure. With the sudden increment of power demand, voltage instability problem has become a main concern to the power system operator because voltage instability has led or crucially contributed to some major blackouts throughout … …American Journal of Applied Sciences, Vol. 11, Issue 5 · 10 Feb 2014 · 7,143 accessesView PDFCite
Research ArticleOpen accessIn the abstractBLOOD VESSEL DIAMETER MEASUREMENT ON RETINAL IMAGENidhal K. El Abbadi, Enas Al SaadiAccurate measurement of vessel diameters on retinal images plays an important part in diagnosing cardiovascular diseases and early signs of certain systemic diseases, such as diabetes and hypertension. In this study we develop new method based on computer aided to determine the width of retinal blood vessels by analysing the color fundus image. Retinal vessel diameter was measured based on … …Journal of Computer Science, Vol. 10, Issue 5 · 18 Jan 2014 · 7,527 accessesView PDFCite
Research ArticleOpen accessIn the abstractTHE ERROR REGISTRATION TECHNIQUE FOR MANEUVERING RADAR NETWORKLiu Yu, Wang Haipeng, Xiong Wei, He YouThis study studies are error registration algorithm for the maneuvering radar network, which is one of the difficult problems of multi-sensor registration. When the maneuvering radar has no orientation bias, measurement equations of both attitude bias and measurement bias can be established by using the common targets observed by different radars. Based on the equations, the real-time estimation of both … …Journal of Computer Science, Vol. 9, Issue 12 · 25 Nov 2013 · 6,581 accessesView PDFCite
Research ArticleOpen accessIn the abstractANALYSIS OF INTERNET TRAFFIC IN EDUCATIONAL NETWORK BASED ON USERS’ PREFERENCESMustafa M.H. Ibrahim, Mohd Hasbullah Omar, Adib M. Monzer Habbal, Khuzairi Mohd ZainiThe demand for Internet services and network resources in Educational networks are increasing rapidly. Specifically, the revolution of web 2.0 "also referred to as the Read-Write Web" has changed the way of information exchange and distribution. Although web 2.0 has gained attraction in all sectors of the education industry, but it results in high-traffic loads on networks which often leads … …Journal of Computer Science, Vol. 10, Issue 1 · 12 Nov 2013 · 6,962 accessesView PDFCite
Research ArticleOpen accessIn the abstractFEATURE DIMENSION REDUCTION FOR EFFICIENT MEDICAL IMAGE RETRIEVAL SYSTEM USING UNIFIED FRAMEWORKYogapriya Jaganathan, Ila VennilaFeature dimensionality reduction problem is a major issue in Content Based Medical Image Retrieval (CBMIR) for the effective management of medical images with the support of visual features for the purpose of diagnosis and educational research field. The proposed CBMIR is used a unified approach based on extraction of visual features, optimized feature selection, classification of optimized features and similarity … …Journal of Computer Science, Vol. 9, Issue 11 · 24 Sep 2013 · 6,982 accessesView PDFCite