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Research ArticleOpen accessIn the keywordsPower Quality Improvement Using a Sliding Mode Control of a Series Active FilterTheerayuth ChatchanayuenyongA sliding mode controller (SMC) for a three-phase series active filter was proposed to compensate voltage unbalances, suppress voltage sags and swells and hence improve the power quality of a three-phase ac system. The voltage unbalance compensation and regulation is only based on the positive sequence component decomposition of the supply voltage that is then adjusted to a rated value … …American Journal of Applied Sciences, Vol. 5, Issue 8 · 31 Aug 2008 · 6,584 accessesView PDFCite
Research ArticleOpen accessIn the keywordsA Novel Detection and Classification Algorithm for Power Quality Disturbances using WaveletsC. Sharmeela, M. R. Mohan, G. Uma, J. BaskaranThis study presents a novel method to detect and classify power quality disturbances using wavelets. The proposed algorithm uses different wavelets each for a particular class of disturbance. The method uses wavelet filter banks in an effective way and does multiple filtering to detect the disturbances. A qualitative comparison of results shows the advantages and drawbacks of each wavelet when … …American Journal of Applied Sciences, Vol. 3, Issue 10 · 31 Oct 2006 · 6,632 accessesView PDFCite
Research ArticleOpen accessIn the keywordsWays of Increasing Seed Germination of Sweet Clover and Methods of Reducing the Amount of Coumarin in the Leaf-Stem MassMarden Ersainovich Baidalin, Igilik Imangalievich Zhumagulov, Ermek Ualikhanovich Sagalbekov, Ualikhan Molgazhdarovich SagalbekovThe article presents the results of laboratory and field experiments on studying the influence of ways of presowing seed treatment and methods of reducing the amount of coumarin on yield and forage quality of sweet clover in the conditions of Northern Kazakhstan. The aim of the research is to study and to prove the effective way of presowing treatment of … …OnLine Journal of Biological Sciences, Vol. 17, Issue 2 · 17 Jun 2017 · 7,241 accessesView PDFCite
Research ArticleOpen accessIn the keywordsA Fast Series Active Filter using Sliding Mode Control to Correct and Regulate Unbalance Voltage in Three-Phase SystemTheerayuth ChatchanayuenyongProblem statement: A Sliding Mode Controller (SMC) with fast reference voltage generation to correct and regulate unbalance voltage in three-phase system was proposed. Approach: The compensation algorithm was not based on three-symmetrical component decomposition so the controller can yield a fast response that was essential in such a critical real time control work. The reference voltages were fed to the … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 30 Jun 2009 · 7,221 accessesView PDFCite
Research ArticleOpen accessIn the author namesCorrelation between Tissue and Released VEGF Levels in Urine of Bladder Cancer PatientsMenha Swellam, Abdulla A.A. El-AalPurpose. Angiogenesis is a complex multistep process essential for tumor growth. Vascular endothelial growth factor (VEGF) is a potent endothelial cell mitogen and vascular permeability-inducing agent. The aim of this study was to analyze whether tissue and urinary VEGF levels of bladder cancer patients are correlated and study their correlation with classical clinicopathological parameters and bilharizial bladder cancer patients. The … …American Journal of Biochemistry and Biotechnology, Vol. 1, Issue 1 · 31 Mar 2005 · 6,639 accessesView PDFCite
Research ArticleOpen accessIn the abstractControlled Delivery System for NPK Agrochemical Release from Chitosan Copolymer HydrogelsMaysam S. Mutlaq, Fawzi Habeeb JabrailChitosan (CS) the polysaccharide was copolymerized with Poly (Vinyl Alcohol) (PVA) for the preparation of CS-co-PVA hydrogel and with Carboxymethyl Cellulose (CMC) for CS-co-CMC hydrogel. The prepared hydrogels were characterized by FTIR, thermal analysis (TGA and DSC), and SEM. The hydrogels were studied for agriculture applications, where their ability to swell and take large quantities of water many times its … …American Journal of Applied Sciences, Vol. 19, Issue 1 · 8 Sep 2022 · 6,746 accessesView PDFCite
Review ArticleOpen accessIn the abstractReview of Signal Processing Techniques for Detection of Power Quality EventsAbhijith Augustine, Ruban Deva Prakash, Rajy Xavier, Mareeta Cheriyan ParasseryThe challenging process industry requires true power for its smooth functioning and here comes the importance of good power or power. The term Power Quality (PQ) aims at supplying true power to the process. The scope of the power quality increased with the introduction of newly designed sophisticated devices like computers and microcontrollers. The performances of these devices are extremely … …American Journal of Engineering and Applied Sciences, Vol. 9, Issue 2 · 30 Apr 2016 · 8,493 accessesView PDFCite
Research ArticleOpen accessIn the abstractArtificial Neural Network Controller Based Distribution Static Compensator for Voltage Sag MitigationD. Rajasekaran, Subhransu Sekhar Dash, Arun Bhaskar Mayilvaganan et al.Switching of loads, capacitors, along with the proliferation of power electronics equipment, non-linear loads in industrial, commercial and domestic applications have lead to power quality issues in the distribution system. Power quality issues such as voltage sag, voltage swell and harmonics, which are certainly major concerning issues in the present era. These issues can lead to failure or malfunction of … …American Journal of Applied Sciences, Vol. 10, Issue 7 · 21 Jun 2013 · 6,955 accessesView PDFCite
Research ArticleOpen accessIn the abstractAnalysis of the Physical-Hydrical Behavior of Massouhoin Coconut Tree Wood in TogoEssey Agbédidi Kossi, Amey Bollanigni Kossi et al.Wood is a very complex and anisotropic material whose properties are significantly influenced by its age and plantation areas. The purpose of this study is to determine the density distribution model of COCOS NUCIFERA (coconut tree) wood from Togo and to analyze its water behavior of physical and water properties 932 wood specimens are selected from a tree trunk from … …American Journal of Applied Sciences, Vol. 21, Issue 1 · 11 Dec 2024 · 8,189 accessesView PDFCite
Research ArticleOpen accessIn the abstractNewcastle Disease Virus VII.2 First Record in KazakhstanMarina Kopochenya, Belan Astemirov, Karina Ivanova et al.Although the NDV vaccination program is quite intensive in Kazakhstan, disease outbreaks are occurring repeatedly. During the fall season of 2023, we effectively achieved the isolation of the Newcastle Disease Virus (NDV) specifically, the class II genotype VII.2. This was accomplished in the context of an outbreak within industrial poultry layers located in the northern geographical sector of Kazakhstan. The … …American Journal of Animal and Veterinary Sciences, Vol. 19, Issue 3 · 12 Sep 2024 · 5,349 accessesView PDFCite