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Research ArticleOpen accessEvery word in the titleWastewater Treatment Using Vertical Subsurface Flow Constructed Wetland in IndonesiaDenny KurniadieProblem statement: A constructed wetland to treat wastewater from farm house has been built in Padjadjaran University farming research station in Jatinangor, Indonesia, in July 2009. Approach: Water samples from both influent and effluent were taken every two weeks and analysed for COD, BOD5, NO3-N, NO2-N, NH4-N, total-N, PO4-P, total coliform bacteria, pH, O2 and settleable solids. Results: The objective … …American Journal of Environmental Sciences, Vol. 7, Issue 1 · 28 Feb 2011 · 8,480 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMobility Management for Seamless Information Flow in a Heterogeneous NetworksAdiline Macriga, AnandhakumarProblem statement: In the heterogeneous networks, generally the entire networks operating on the Radio Frequencies under wireless mode available for communication are brought under a single head based on their common operating procedures and functions. As a common mode the basic functions of the networks are requesting, tracing, sending, acknowledging, authenticating, authorizing, receiving, updating, forwarding, controlling, registering, managing. As the … …Journal of Computer Science, Vol. 7, Issue 2 · 25 Feb 2011 · 6,891 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleRoughness Effect on an Unsteady Flow in Pipelines by Profilometry and Imaging TechniquesMabrouk Benkhedimallah, Rabah Zegadi, Mohamed BouafiaProblem statement: Currently the aero dynamical calculation in gas pipes is carried out under the assumption of steady state conditions. However real steady in a network is scarcely quasisteady. Approach: The unsteady state is governed by non-linear partial differential equations leading to mathematical difficulties. And there are fore gas pipe dimensions are computed at steady state under extreme conditions. Results: … …American Journal of Engineering and Applied Sciences, Vol. 4, Issue 1 · 29 Jan 2011 · 8,157 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleApplication of Interline Power Flow Controller to Increase Transient Stability of Power SystemPrechanon KumkratugProblem statement: The Interline Power Flow Controller (IPFC) is a novel device which can increase transient stability of power system. To verify the capability of the effect of IPFC on stability improvement of power system, the suitable mathematical model and control strategy of IPFC are needed to be presented. Approach: This study presented the mathematical model and control strategy of … …Journal of Computer Science, Vol. 6, Issue 12 · 22 Nov 2010 · 7,646 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAnalysis of Interregional Commodity FlowsWirach Hirun, Sompong SirisoponsilpProblem statement: Commodity Flow Survey (CFS) was launched to collect comprehensive freight flow data throughout the kingdom of Thailand. The survey’s database is the most complete collection of commodity flow data in Thailand. The need to reveal interregional freight characteristics using available data from the CFS led to the objectives of this research. Approach: An origin destination matrix based on … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 4 · 22 Nov 2010 · 8,928 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleInvestigating the Effect of Powder Type on Improving the Flow in PipelinesHayder A. Abdul Bari, Rosli Bin Mohd Yunus, Tania Suhail HadiProblem statement: In the present investigation, three types of powders are chosen to be investigated as drag reducing agent in aqueous media. The effect of powder type effect will be highlighted in the present study. Approach: Three types of powders were select to be investigating in the present study, which are the sand, aluminum and the coal powders. The reason … …American Journal of Applied Sciences, Vol. 7, Issue 11 · 8 Nov 2010 · 7,398 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePower System Stability Enhancement Using Unified Power Flow ControllerPrechanon KumkratugProblem statement: The enhancement of transient stability of the power system is one of the most challenging research areas in power engineer. Approach: This study presents the method to enhance transient stability of power system by Unified Power Flow Controller (UPFC). The mathematical model of power system equipped with a UPFC is systematically derived. The parameters of UPFC are modeled … …American Journal of Applied Sciences, Vol. 7, Issue 11 · 8 Nov 2010 · 7,679 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Numerical Treatment of Air Flow Model in the Area Under the Station Platform of Thailand BTS Sky TrainNopparat PochaiProblem statement: The area under Phayathai station platform of sky train in Bangkok, Thailand, has a problem of air pollution control. Approach:The Bangkok Mass Transit System Company tries to set up the electric fans inside the area for air flow improvement. Results: The flow of the air is still not smooth and the air quality is still lower than standard. … …American Journal of Applied Sciences, Vol. 7, Issue 11 · 8 Nov 2010 · 7,096 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleNumerical Investigation of Incompressible Fluid Flow through Porous Media in a Lid-Driven Square CavityM.A. Mohd Irwan, A. M. Fudhail, C.S. Nor Azwadi, G. MasoudProblem statement: Investigation of fluid flow behavior through porous media in a liddriven square cavity. Approach: The Brinkman-Forcheimer equation is coupled with the lattice Boltzmann formulation to predict the velocity field in the system. Three numerical experiments were preformed with different values of Darcy number to investigate the effect of porosity on the fluid flow. Results: In the current study, … …American Journal of Applied Sciences, Vol. 7, Issue 10 · 31 Oct 2010 · 7,409 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleFast Decoupled Power Flow for Power System with High Voltage Direct Current Transmission Line SystemPrechanon KumkratugProblem statement: High voltage direct current transmission line system has been widely applied for control power flow in power system. The power flow analysis was the one of powerful tools by which the power system equipped was analyzed both for planning and operation strategies. Approach: This study presented the method to analyze power flow of power system consisted of HVDC … …American Journal of Applied Sciences, Vol. 7, Issue 8 · 31 Aug 2010 · 7,015 accessesView PDFCite