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255 articles for “critical state”
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Research ArticleOpen accessIn the abstractDirect Shocks in Vibrationally Nonequilibrium Diatomic Gases at Various Distances from Critical Cross-Section of NozzleRydalevskaya Maria Alexandrovna, Voroshilova Yulia Nikolaevna, Uskov Vladimir NikolaevichThe high-temperature diatomic gas flows are considered in expanding nozzles under the conditions of a disturbance of the equilibrium distribution over vibrational levels of the molecules. The investigation of such flows is bound up with the problem of the inversion of the vibrational populations in the active mediums of molecular lasers. Under diverse values of the pressure overfall on coming … …American Journal of Applied Sciences, Vol. 11, Issue 11 · 7 Jan 2015 · 6,655 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Teaching Method to Develop a Critical Thinking of the Students of the General Education Ecclesiastical SchoolPhrakhruvisitpattanaporn, Saner Piromjitrapong, Saman AsavabhumiProblem statement: The objectives of the research were to study (1) the teaching method to develop a critical thinking of the students of the General Education Ecclesiastical School, (2) the effectiveness of the teaching method to develop a critical thinking of the students of the General Education Ecclesiastical School. Approach: The populations were the students of 35 general education ecclesiastical … …Journal of Social Sciences, Vol. 8, Issue 3 · 31 Aug 2012 · 7,335 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Methodological Framework for Software Safety in Safety Critical Computer SystemsP. V. Srinivas Acharyulu, P. SeetharamaiahSoftware safety must deal with the principles of safety management, safety engineering and software engineering for developing safety-critical computer systems, with the target of making the system safe, risk-free and fail-safe in addition to provide a clarified differentaition for assessing and evaluating the risk, with the principles of software risk management. Problem statement: Prevailing software quality models, standards were not … …Journal of Computer Science, Vol. 8, Issue 9 · 16 Aug 2012 · 7,659 accessesView PDFCite
Research ArticleOpen accessIn the abstractPower-Voltage Characteristics of Power System with the Long Transmission LinePrechanon KumkratugProblem statement: Power- Voltage curve provides very important information for voltage stability analysis. The exact long transmission line model consists of the resistance and the reactance. The resistance causes in the active line loss. It is not easy task to achieve the power-voltage curve characteristics of power system with the exact long line model. Approach: This study applies the concept … …American Journal of Applied Sciences, Vol. 9, Issue 10 · 10 Aug 2012 · 8,679 accessesView PDFCite
Research ArticleOpen accessIn the abstractPower-Voltage Characteristics of Power System with the Short Transmission LinePrechanon KumkratugProblem statement: Power-Voltage curve provides very important information for voltage stability analysis. The exact short transmission line model consists of the resistance and reactance. The resistance causes in the active line loss. It is not easy task to achieve the power-voltage curve characteristics of power system with the exact short line model. Approach: This study applied the concept of the … …American Journal of Applied Sciences, Vol. 9, Issue 6 · 20 Mar 2012 · 7,457 accessesView PDFCite
Research ArticleOpen accessIn the abstractPower-Voltage Characteristics of Power System with the Medium Transmission LinePrechanon KumkratugProblem statement: Power-Voltage curve provides very important information for voltage stability analysis. The exact medium transmission line model consists of the resistance and the reactance. The resistance causes in the active line loss. It is not easy task to achieve the power-voltage curve characteristics of power system with the exact medium line model. Approach: This study applies the concept of … …American Journal of Applied Sciences, Vol. 9, Issue 6 · 19 Mar 2012 · 8,258 accessesView PDFCite
Research ArticleOpen accessIn the abstractTransient Stability of the Power System with the Exact Long Transmission Line ModelPrechanon KumkratugProblem statement: The exact long transmission line model consists of the lump of the series resistance, reactance and shunt capacitance. With the consideration the actual long transmission line model, it causes in the difficulty of deriving the mathematical model. Approach: This study investigates the transient stability of power system with consideration the exact long transmission line model. The concept of … …American Journal of Applied Sciences, Vol. 9, Issue 3 · 24 Jan 2012 · 6,856 accessesView PDFCite
Research ArticleOpen accessIn the abstractInvestigating the Critical Clearing Time of Power System with the Exact Medium Transmission Line ModelPrechanon KumkratugProblem statement: The exact medium transmission line model consists of the resistance, series reactance and shunt capacitance. Most of previous research studies show the critical clearing time of single machine infinite bus while neglecting the resistance and capacitance of the line. Approach: This study investigates the critical clearing time of power system with consideration the exact medium transmission line mode. … …American Journal of Applied Sciences, Vol. 9, Issue 3 · 23 Jan 2012 · 7,420 accessesView PDFCite
Research ArticleOpen accessIn the abstractInvestigation of the Critical Clearing Time of Power System with Synchronous Machine Model Including SaliencyPrechanon KumkratugProblem statement: Most of synchronous generator applied in power system is the salient pole type. Most of previous researches use non-salient model to evaluate the critical clearing time. Thus the results of critical clearing time of power system may be error. Approach: Thus this paper investigate the critical clearing time of power system with synchronous machine. The mathematical model of … …American Journal of Applied Sciences, Vol. 9, Issue 2 · 21 Dec 2011 · 7,486 accessesView PDFCite
Research ArticleOpen accessIn the abstractEnergy Efficient Aggregation for Continuous Monitoring Applications of Wireless Sensor NetworkR. Rajkamal, P. Vanaja RanjanProblem statement: Continuous Monitoring of time critical phenomenon is one of the major streams of possible application in this arena. Sensing and Monitoring of such phenomenon involves in dealing with large amount of data correlated in spatial and temporal dimensions. Most applications of WSN, the nodes are hard to reach and it is impossible to replace their batteries so the … …Journal of Computer Science, Vol. 8, Issue 1 · 28 Oct 2011 · 7,405 accessesView PDFCite