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111 articles for “ABR”
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Research ArticleOpen accessIn the author namesModeling the Error Term by Moving Average and Generalized Autoregressive Conditional Heteroscedasticity ProcessesAyodele Abraham Agboluaje, Suzilah bt Ismail, Chee Yin YipThis study has been able to reveal that the Combine White Noise model outperforms the existing Generalized Autoregressive Conditional Heteroscedasticity (GARCH) and Moving Average (MA) models in modeling the errors, that exhibits conditional heteroscedasticity and leverage effect. MA process cannot model the data that reveals conditional heteroscedasticity and GARCH cannot model the leverage effect also. The standardized residuals of GARCH … …American Journal of Applied Sciences, Vol. 12, Issue 11 · 20 Nov 2015 · 6,726 accessesView PDFCite
Research ArticleOpen accessIn the author namesLocal Climate Trends and Farmers’ Perceptions in Southern Tigray, Northern EthiopiaM. G. Abrha, S. SimhadriThis study aimed to investigate changes in local climate, farmers’ perception to the change and factors affecting perception of farmers to climate change. For trend analysis, we gathered station based rainfall records for the period 1978-2012, while for perception analysis survey was carried out. 600 farming households were randomly selected from four districts using a multi-stage sampling method. Nonparametric analysis … …American Journal of Environmental Sciences, Vol. 11, Issue 4 · 8 Oct 2015 · 7,926 accessesView PDFCite
Research ArticleOpen accessIn the author namesOccurrence of Feline Immunodeficiency Virus (FIV) and Feline Leukemia (FeLV) in São Luís-MANathálya dos Santos Martins, Ana Paula Sousa Rodrigues, Stefanne Aparecida Gonçalves et al.The aim of this study was to evaluate the occurrence of feline immunodeficiency virus and feline leukemia virus in the city of São Luí­s, Maranhão state (MA), Brazil. A total of 120 blood samples were tested using the Polymerase Chain Reaction (PCR) to detect the proviral DNA, with an amplification of a fragment of 244bp of the FIV's gene gag. … …American Journal of Animal and Veterinary Sciences, Vol. 10, Issue 3 · 24 Jul 2015 · 8,946 accessesView PDFCite
Research ArticleOpen accessIn the author namesNitric Oxide Donors with Therapeutic Strategic in Experimental Schistossomiasis MansoniWander Rogério Pavanelli, Jean Jerley Nogueira da Silva, Carolina Panis et al.Schistosomiasis, an immune disease, remains a major public health problem in endemic area. To determine the influence of Nitric Oxide (NO) on this disease, we tested two compounds (Trans-[Ru(bpy)2(NO)SO3](PF6)-PF6 and Na2[Fe(CN)5(NO)]-SNP, which releases NO when activated by biological reducing agents, in BALB/c mice infected subcutaneously by Schistosoma BH strains. The parasitic activity of NO-donors was evaluated in this model by … …American Journal of Immunology, Vol. 10, Issue 4 · 24 Feb 2015 · 7,852 accessesView PDFCite
Research ArticleOpen accessIn the author namesExperimental and Skeletal Kinetic Model Study of Compressed Natural Gas Fueled Homogeneous Charge Compression Ignition EngineP. M. Diaz, B. Durga Prasad, D.S. Manoj Abraham, K. PalaniKumarProblem statement: In homogeneous charge compression ignition engines fuel oxidation chemistry determines the auto-ignition timing, heat release, reaction intermediates and the ultimate products of combustion. To shorten development time and to understand combustion processes, the use of simulation is increasing. Approach: A model that correctly simulates fuel oxidation at these conditions would be a useful design tool. Detailed models of … …American Journal of Applied Sciences, Vol. 9, Issue 6 · 22 Mar 2012 · 7,258 accessesView PDFCite
Research ArticleOpen accessIn the author namesThe Use of Silver Vine (Actinidia Polygama Maxim, Family Actinidiaceae) as an Enrichment Aid for Felines: Issues and ProspectsCharles I. Abramson, Angela Lay, Timothy J. Bowser, Christopher A. VarnonProblem statement: This study highlights the potential of using silver vine as an enrichment additive for felines. Approach: A literature review was conducted on the use of silver vine since 1973. The articles were categorized into studies concerned with behavior, biological effects, beneficial uses, plant and chemical studies. Results: We found surprisingly few studies that utilized silver vine. There were … …American Journal of Animal and Veterinary Sciences, Vol. 7, Issue 1 · 10 Mar 2012 · 18,953 accessesView PDFCite
Research ArticleOpen accessIn the author namesThe Case for Interdisciplinary Environmental Education and ResearchWill Focht, Charles I. AbramsonProblem statement: Interdisciplinary environmental education and research at American colleges and universities have been criticized for ambiguous focus, insufficient integration and lack of rigor. Part of the reason for a clearly articulated conceptualization of the field is the failure to reach a consensus among those in the environmental profession and academic community on an overarching paradigm of environmental education and … …American Journal of Environmental Sciences, Vol. 5, Issue 2 · 30 Apr 2009 · 7,208 accessesView PDFCite
Research ArticleOpen accessIn the author namesAnalysis of the Parameters Affecting Warping In Radial Forging ProcessF. Djavanroodi, M. Sabeghi, K. AbriniaRadial forging is a process in which one or two punches move axially causing a radial flow into a die cavity by means of which a flange is formed. During forging, warping, in which the lower face of thin flange rises from the die face may occur. To better understand the effect of parameters affecting the warping in radial forging … …American Journal of Applied Sciences, Vol. 5, Issue 8 · 31 Aug 2008 · 6,543 accessesView PDFCite
Research ArticleOpen accessIn the author namesNew Analysis for The FGM Thick Cylinders Under Combined Pressure and Temperature LoadingK. Abrinia, H. Naee, F. Sadeghi, F. DjavanroodiAn analytical solution for computing the radial and circumferential stresses in a FGM thick cylindrical vessel under the influence of internal pressure and temperature is presented in this paper. It has been assumed that the modulus of elasticity and thermal coefficient of expansion were varying through thickness of the FGM material according to a power law relationship. Nevertheless the value … …American Journal of Applied Sciences, Vol. 5, Issue 7 · 31 Jul 2008 · 7,128 accessesView PDFCite
Research ArticleOpen accessIn the author namesA Preliminary Study of Illumination Levels in University and Elementary Classrooms in Campina Grande, BrazilCharles I. Abramson, Melanie C. Page, Mia Zolna et al.The purpose of our study was to provide preliminary data on light levels used in university and elementary school classrooms in Campina Grande, Brazil with the aim of providing Brazilian politicians and educators with data to support continued educational initiatives in northeast Brazil. The data were gathered at the Universidade Federal de Campina Grande (UFCG) and compared with a sample … …Journal of Social Sciences, Vol. 3, Issue 3 · 30 Sep 2007 · 7,480 accessesView PDFCite