300 articles for “Empirical Study”

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Research ArticleOpen accessIn the abstractModeling of Oxygen Transfer Correlations for Stirred Tank Bioreactor Agitated with Atypical Helical Ribbon ImpellerMohd Shamzi Mohamed, Rosfarizan Mohamad, Ramakrishnan Nagasundara Ramanan et al.Problem Statement: Mixing filamentous fungi entails delicate balance between promoting high volumetric oxygen transfer coefficient (kLa) while keeping low hydrodynamic stresses in the microenvironment of cultures. This study examined the oxygen transfer capability of a prototype low shear helical impeller as a potential replacement for the standard Rushton turbine. Approach: The dependence of kLa upon specific power uptake, superficial gas … …American Journal of Applied Sciences, Vol. 6, Issue 5 · 31 May 2009 · 9,169 accessesView PDF Cite

Research ArticleOpen accessIn the abstractVerifying Complex Interaction between Hardware ProcessesKiran Ramineni, Shireesh Verma, Ian G. HarrisProblem statement: Verification of correct functionality of semiconductor devices has been a challenging problem. Given the device fabrication cost, it is critical to verify the expected functionality using simulations of executable device models before a device manufactured. However, typical industrial scale devices today involve large number of interactions between their components. Complexity of verifying all interactions becomes almost intractable even … …Journal of Computer Science, Vol. 5, Issue 2 · 28 Feb 2009 · 6,956 accessesView PDF Cite

Research ArticleOpen accessIn the abstractService Loyalty Measurement Scale: A Reliability AssessmentJ. Clement Sudhahar, Duraipandian Israel, A. Prabhu Britto, M. SelvamThis research article demonstrates the application of Confirmatory Factor Analysis (CFA) in the scale development process of measuring the construct Service Loyalty (SERVLOYAL). The conceptualization of SERVLOYAL is presented, the dimensions forming the SERVLOYAL construct are figured out. The nitty-gritty of CFA is discussed. And the results of CFA analysis for SERVLOYAL scale developed are found to be reliable. This … …American Journal of Applied Sciences, Vol. 3, Issue 4 · 30 Apr 2006 · 7,863 accessesView PDF Cite

Research ArticleOpen accessIn the abstractUsing Neutral Network in Predicting Corporate FailureHuong G. NguyenThis study investigates the predictive power of three neutral network models: Multi-layer neural network, probabilistic neural network, and logistic regression model in predicting corporate failure. Basing on the database provided by The Corporate Scorecard Group (CSG), we combine financial ratios which deem to be significant predictors of corporate bankruptcy in many previous empirical studies to build our predictive models and … …Journal of Social Sciences, Vol. 1, Issue 4 · 31 Dec 2005 · 7,327 accessesView PDF Cite

Research ArticleOpen accessIn the abstractStrong Dependence at the Long Run and the Cyclical Frequencies in the Specification of the US Unemployment RateL. A. Gil-AlanaThis study deals with the presence of long range dependence at the long run and the cyclical frequencies in the specification of the US unemployment rate. We use a parametric procedure that permits us to test unit and fractional roots in raw time series. The results show that both the long run and the cyclical structures present a component of … …American Journal of Applied Sciences, Vol. 2, Issue 2 · 28 Feb 2005 · 6,506 accessesView PDF Cite

Research ArticleOpen accessIn the abstractHouse Price Prediction: Hedonic Price Model vs. Artificial Neural NetworkVisit Limsombunchai, Christopher Gan, Minsoo LeeThe objective of this study is to empirically compare the predictive power of the hedonic model with an artificial neural network model for house price prediction. A sample of 200 houses in Christchurch, New Zealand is randomly selected from the Harcourt website. Factors including house size, house age, house type, number of bedrooms, number of bathrooms, number of garages, amenities … …American Journal of Applied Sciences, Vol. 1, Issue 3 · 30 Sep 2004 · 9,606 accessesView PDF Cite

Research ArticleOpen accessIn the abstractSolving Linear Programming Problems on the Parallel Virtual Machine EnvironmentJrJung Lyu, Hsing Luh, Ming-Chang LeeThis study developed a parallel algorithm to efficiently solve linear programming models. The proposed algorithm utilizes the Dantzig-Wolfe Decomposition Principle and can be easily implemented in a general distributed computing environment. The analytical performance of the well-known method, including the speedup upper bound and lower bound limits, was derived. Numerical experiments are also provided in order to verify the complexity … …American Journal of Applied Sciences, Vol. 1, Issue 2 · 30 Jun 2004 · 7,841 accessesView PDF Cite

Research ArticleOpen accessIn the abstractThe Mechanism of Stock Market Integration: Evidence for the Taiwan and U.S. Stock MarketMin-Hsien Chiang, Rung-Ho Lai, Hsiao-Ching LeeThis study investigates the sources of the comovement of the Taiwan and U.S. stock market. The empirical evidence shows that both economic fundamentals and equity risk premiums can act as transmission mechanisms of both markets. In the meantime, the financial integration is much stronger than real economic integration. Moreover, the deregulation of foreign investments in Taiwan and the Southeast Asian … …American Journal of Applied Sciences, Vol. 1, Issue 1 · 31 Mar 2004 · 7,199 accessesView PDF Cite

Research ArticleOpen accessIn the abstractSome Algorithms to Identify Rational Structures in Stochastic Processes with ExpectationsConcepción González-Concepción, María Candelaria Gil-Fariña, Celina Pestano-GabinoThis research was concerned with the identification of rational models in stochastic processes and we use the Padé-Laurent Approximation to identify a Transfer-Function Model with Expectations. We mention the T-table method and focus in studying the generalised epsilon-algorithm, emphasizing the main role of the statistical significance of their numerical entries. Empirical work is made for non-causal TF models using both … …Journal of Mathematics and Statistics, Vol. 3, Issue 4 · 31 Dec 2007 · 6,754 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordAn Empirical Investigation of the Pollution Haven-Halo Nexus in Eastern and Southern AfricaPaul KauluThis study looks into the relationship between trade and pollution in Eastern and Southern Africa from 1977 to 2016. This timeframe is particularly relevant as it was marked by rising CO₂ emissions despite major climate agreements such as the Kyoto Protocol (1997), Reducing Emissions from Deforestation and Forest Degradation (REDD+, 2007), as well as the Paris Agreement (2015). Using time-series … …American Journal of Environmental Sciences, Vol. 21, Issue 1 · 28 Jan 2026 · 2,924 accessesView PDF Cite