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31 articles for “empirical properties”
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Research ArticleOpen accessEvery word in the titlePhysical Properties of Phenol Compound: Semi-empirical Calculation of Substituent Effects [Part One]Ammar A. Ibrahim, Eid A. AbdalrazaqProblem statement: Physical properties of phenol compound such as steric energy, charge of oxygen, ionization potential, dipole moment, LUMO and bond length have been calculated. Approach: All molecular geometries were minimized by quantum mechanic especially at (AM1) method was used to investigate the effect of a variety of substituents on the phenol (H, o-Cl, p-Cl, m-Cl, o-CH3, m-CH3, p-CH3, o-NH2, … …American Journal of Applied Sciences, Vol. 6, Issue 7 · 31 Jul 2009 · 7,365 accessesView PDFCite
Research ArticleOpen accessIn the keywordsSome Effects of Alternative Foreign Currency Translation Methodologies on two Short-Term Liquidity RatiosPaul E. HoltThis study focused on two short-term liquidity ratios, the current ratio and inventory turnover and attempted to identify, in terms of empirical properties, if and in what ways foreign currency translation methodologies generate different results. Fifty companies’ accounts were translated from U.S. dollars to U.K. pounds. Post-translation Spearman rank correlation coefficients were extremely high for all methodology pairs, but t … …American Journal of Economics and Business Administration, Vol. 3, Issue 4 · 8 Mar 2012 · 7,484 accessesView PDFCite
Research ArticleOpen accessIn the abstractAn Empirical Study of Robust Modified Recursive Fits of Moving Average ModelsMohamed Ali Ismail, Hend A. Auda, Joe W. McKean, Mahmoud Mohamed SadekThe time-series Moving Average (MA) model is a nonlinear model; see, for example. For traditional Least Squares (LS) fits, there are several algorithms to use for computing its fit. Since the model is nonlinear, Fuller discusses a Newton-type step algorithm. proposed a recursive algorithm based on a sequence of three linear LS regressions. In this study, we robustify Koreisha and … …Journal of Mathematics and Statistics, Vol. 18, Issue 1 · 28 Jul 2022 · 5,859 accessesView PDFCite
Research ArticleOpen accessIn the abstractAbsolute Measures of Interindividual Variation: A Simulation StudyJosé Moral-de la RubiaFour absolute measures and one relative measure of interindividual variability have been defined, together with their point and interval estimation (bootstrap and asymptotic), and an R script has been developed for their computation. However, further simulation studies are required to strengthen their methodological evaluation. This study focused on the three absolute measures with potentially better regularity conditions, Mean Interindividual Differences … …Journal of Mathematics and Statistics, Vol. 22, Issue 1 · 4 Aug 2026 · 957 accessesView PDFCite
Research ArticleOpen accessIn the abstractRecent Progress in Self-Cleaning Materials with Different Suitable ApplicationsSiavash Hosseinpour Chermahini, Kaveh Ostad-Ali-Askari, Saeid Eslamian, Vijay P. SinghSelf-cleaning properties have received significant attention for the importance of their potential. Coatings at Nano-scales offer possibilities of using materials for self-cleaning surfaces. Recent efforts have begun to focus on the kinds of materials including metals, semiconductors and polymers. Such materials can have enormous potential in only a few applications. Moreover, the production of these materials requires high costs with … …American Journal of Engineering and Applied Sciences, Vol. 11, Issue 2 · 25 Apr 2018 · 9,132 accessesView PDFCite
Research ArticleOpen accessIn the abstractAndroid Based House Mart ApplicationBayu Kanigoro, Afan Galih Salman, AnthonySeveral marketing media outlets do not offer adequate information regarding the homes they sell to fulfill property sellers' needs. In addition, purchasers find it difficult to find homes that meet their criteria because media marketing is less effective. Therefore, the purpose of this research is to create an Android-based mobile application capable of making it easier for owners and buyers … …Journal of Computer Science, Vol. 17, Issue 8 · 1 Sep 2021 · 7,543 accessesView PDFCite
Research ArticleOpen accessIn the abstractTHERMAL CONDUCTIVITY OF RUBBERIZED GYPSUM BOARDTaher Abu-Lebdeh, Ellie Fini, Ashraf FadielThe disposal of scrap tires is a challenging task and hence an innovative solution to meet these challenges is needed. Extensive work has been done on the utilization of waste tires in a variety of applications in asphalt pavements and concrete. However, previous investigations focus only on the mechanical properties of the rubberized materials, but few on the thermal performance. … …American Journal of Engineering and Applied Sciences, Vol. 7, Issue 1 · 14 Mar 2014 · 8,775 accessesView PDFCite
Research ArticleOpen accessIn the abstractUSE OF CRUMB RUBBER TO IMPROVE THERMAL EFFICIENCY OF CEMENT-BASED MATERIALSAshraf Fadiel, Fouad Al Rifaie, Taher Abu-Lebdeh, Ellie FiniMotivated by the tremendous trend toward green environment and to reduce the effect of scrap tires on the environment and human health, this research is an attempt to find a practical and environmentally sound solution of the problem of scrap tires by developing a light weight with low thermal conductivity composite construction materials using waste tires. A few literatures may … …American Journal of Engineering and Applied Sciences, Vol. 7, Issue 1 · 14 Mar 2014 · 12,197 accessesView PDFCite
Research ArticleOpen accessIn the abstractTHE PROPERTIES OF NUCLEAR MATTERKhaled Hassaneen, Hesham MansourThe microscopic and bulk properties of nuclear matter at zero and finite temperatures are studied in the frame of the Brueckner theory. The results for the symmetry energy are also obtained using different potentials. The calculations are based on realistic nucleon-nucleon interactions which reproduce the nucleon-nucleon phase shifts. These microscopic approaches are supplemented by a density-dependent contact interaction to achieve … …Physics International, Vol. 4, Issue 1 · 17 Jul 2013 · 7,230 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Rutting Depth in Flexible Pavements by Using Finite Element Analysis and Local Empirical ModelAlaa H. Abed, Adel A. Al-AzzawiThe objective of this research is to predict rut depth in local flexible pavements. Predication model in pavement performance is the process that used to estimate the parameter values which related to pavement structure, environmental condition and traffic loading. The different local empirical models have been used to calculate permanent deformation which include environmental and traffic conditions. Finite element analysis … …American Journal of Engineering and Applied Sciences, Vol. 5, Issue 2 · 17 Aug 2012 · 8,741 accessesView PDFCite