List of Articles TAP

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  1 - Laboratory findings of acute pancreatitis in dogs and cats
  Niloufar  Abedi Mahdieh  Zaeemi
  Pancreatitis is the most common exocrine pancreatic disease in both dogs and cats. Acute pancreatitis is an inflammation with acute onset and characterized by necrosis and edema. Premature activation of trypsin in the acinar cells starts a cascade of reactions that re More

  Pancreatitis is the most common exocrine pancreatic disease in both dogs and cats. Acute pancreatitis is an inflammation with acute onset and characterized by necrosis and edema. Premature activation of trypsin in the acinar cells starts a cascade of reactions that result in autodigestion. Dogs are often presented with gastrointestinal signs, whereas lethargy and anorexia are the most commonly observed symptoms in cats. Acute pancreatitis may cause cardiovascular shock, disseminated intravascular coagulation or disability of multi organs and/or death. Diagnosing acute pancreatitis in dogs and cats is difficult. Several diagnostic methods have been proposed for the diagnosis of pancreatitis over the past few years, most of which are not applicable due to poor performance, inaccessibility or aggressiveness. Besides, many radiographic methods are used yet none of them are efficient except ultrasonography. Although several laboratory tests including measurement of hematology and biochemistry factors are available, none of them are specific for pancreatitis and they are merely beneficial in rejecting other diseases. The aim of this study was to investigate the more specific diagnostic tests for acute pancreatitis in small animals. Manuscript profile
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  2 - Determination of Control Variables in Power Systems to Maximum Load Restoration
  H. Afrakhte   A. Yazdian Varjani
  This paper presents a new method to maximize load restoration in faulted condition in power systems. Control variables which are used to restore maximum load include tap of power transformers, generation rescheduling, and load shedding in the worst case. Modeling is don More

  This paper presents a new method to maximize load restoration in faulted condition in power systems. Control variables which are used to restore maximum load include tap of power transformers, generation rescheduling, and load shedding in the worst case. Modeling is done in three stages with various control variables arrangements. In the first stage of modeling, power transformer tap is used as a control variable. In the second stage, power transformers taps and generations rescheduling are considered. In the last stage, load shedding as another variable is added to decision variable spaces. Since the number of variables is high and final solution space can be nonlinear, genetic algorithm is used in the optimization process. The capabilities of the proposed method were assessed using IEEE-RTS test system with satisfactory results. Manuscript profile
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  3 - Detection and Analysis of Acoustic Signals of Power Transformers On-Load Tap Changers for Assessment of Their Faults
  adel younesi Abbas Ghayebloo Hasanreza Mirzaei
  <p><span style="font-size: 10.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">On load tap changers are very important equipment of the power transfor More

  <p><span style="font-size: 10.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">On load tap changers are very important equipment of the power transformers. Due to the strongly mechanical movements and high-energy arcs, this equipment has a much higher failure rate with respect to other internal transformer equipment. Online and accurate evaluation of well operation of these equipment by indicators with no interfere on the normal operation of the transformer, is very important issue. In this paper, various faults detecting methods in the tap changer have been discussed an investigated by some extracted features of acoustic signals. These signals have been captured experimentally in various tap changing periods by an accelerometer sensor mounted on a power transformer body. In this paper, in addition to common features, two new feathers entitled time and frequency indicators have been introduced. Finally, for selecting the proper features to faults detection and proposing an effective classification method, some available experimental data were randomly defected by results in the references, and classified successfully as healthy and defective data by support vector machine (SVM) method.</span></p> Manuscript profile
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  4 - palaeoechology and taphonomy of Albian-Cenomanian Echinoids of Kazhdumi Formation in Firouzabad section, Zagros Basin
  Babak Sedghi Ali Bahrami Yazdi Yazdi
  Kazhdumi Formation deposits in Firouzabad section were investigated regarding the postmortem and burial events of echinoderms, from about 150 echinoderm fossils which include 10 genera and 13 species of Coenholectypus neocomiensis, Phymosoma binexilis, Dorocidaris taouz More

  Kazhdumi Formation deposits in Firouzabad section were investigated regarding the postmortem and burial events of echinoderms, from about 150 echinoderm fossils which include 10 genera and 13 species of Coenholectypus neocomiensis, Phymosoma binexilis, Dorocidaris taouzensis, Cottaldia aff. Benettiae, Leptosalenia sergipensis, Phymosoma baylei, Micropedina olisiponensis, Tetragramma deshayesi, Macraster douvillei, Mecaster batnensis, Macraster obtritus, Pliotoxaster comanchei, Macraster sp., Hemiaster sp. most part of them suffer from disarticulation and fragmentation, radial cracks and shell deformation (test outline distortion and radial cracking) and volume change and biological erosion (bioerosion) and perforation by living worms (microboring). Of course, after volume changes, fractures or taphonomic compression, the existing solutions (hydrocarbon and solutions rich in iron, manganese and sometimes silica) hydroxides have been replaced in the cracks. The test of these echinoderms has been used by symbiotic epifauna such as Osterids and Gryphaes as food and attachment points and shelter after their death and burial. It seems that the volume change, crushing, solution injection and fauna bending are influenced by the tectonic pressure of the salt domes of the region and the soft lithology (high plasticity) of the Kazhdami formation between the Darian and Sarvak formations. Manuscript profile