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539 articles for “Nature”
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Research ArticleOpen accessIn the abstractNeuropsychological Dysfunction among HIV Infected Drug AbusersRamani S. Durvasula, Charles H. HinkinHuman immunodeficiency virus (HIV) has been documented to cause direct and indirect central nervous system dysfunction that can be observed as a progressive decline in neuropsychological functioning in a large proportion of persons with HIV and AIDS. Neuropsychological decline in individuals with HIV is characterized by cognitive and motor slowing, attentional deficits, executive dysfunction and memory impairment (characterized by intact … …American Journal of Infectious Diseases, Vol. 2, Issue 2 · 30 Jun 2006 · 7,155 accessesView PDFCite
Research ArticleOpen accessIn the abstractA 2-Dimensional Model for the Transmission Dynamics of Schistosomiasis in the Human-Snail HostsG. Besigye-BafakiThe modes of transmission of schistosomiasis are considered. The transmission model is developed with an aim of establishing possible endemic equilibria within the community. Analysis of the model reveals that if the recovery rate β of human infectives and the death rate of snails δ are increased and if at the same time the contact rate κ of the human … …American Journal of Applied Sciences, Vol. 3, Issue 5 · 31 May 2006 · 6,506 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Restructuring Process of Teacher Training System in Turkey: A Model of Teacher Training Based on Post-Graduate Education (PGCE)Sabahattin Deniz, Nurettin SahinThe article highlights the development and restructuring of teacher education policy in Turkey and reforms in late 1990s. It includes an overview of the history of modern teacher education in the country and outlines the current system. The purpose of this paper was to describe the nature of reforms and restructuring process based on post-graduate teacher education (PGCE) in the … …Journal of Social Sciences, Vol. 2, Issue 1 · 31 Mar 2006 · 7,982 accessesView PDFCite
Research ArticleOpen accessIn the abstractKinetics of Chromium Sorption on Biomass Fungi from Aqueous SolutionLouhab Krim, Sahmoune Nacer, Goma BilangoThe kinetics of chromium ions sorption from aqueous solution on fungi biomass have been investigated in a batch system. The experimental data were analysed based on an intraparticle diffusion equation and a pseudo-second-order mechanism, in order to predict the constant rate of sorption and the equilibrium capacity with the effect of initial chromium ions concentration, temperature and initial solution pH. … …American Journal of Environmental Sciences, Vol. 2, Issue 1 · 31 Mar 2006 · 7,418 accessesView PDFCite
Research ArticleOpen accessIn the abstractHybrid Optimize Strategy based QoS Route Algorithm for Mobile Ad hoc NetworksFu Peng, Zhang DeyunIt is very difficult to find feasible QoS (Quality of service) routes in the mobile ad hoc networks (MANETs), because of the nature constrains of it, such as dynamic network topology, wireless communication link and limited process capability of nodes. In order to reduce average cost in flooding path discovery scheme of the traditional MANETs routing protocols and increase the … …Journal of Computer Science, Vol. 2, Issue 2 · 28 Feb 2006 · 6,546 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Note towards Reshaping Java's FeaturesN. S. Kutti, Z. A. Al-Khanjari, H. A. Ramadhan, J. FiaidhiProgramming Languages continually go through the refinement process due to several findings such as lack of robustness, lack of flexibility, lack of simplicity and lack of standard. This may require pruning undesirable features, sometimes softening of hard nature of some features and adding new features to improve the scope of the languages. Recently Java has emerged as a refined language … …Journal of Computer Science, Vol. 1, Issue 4 · 30 Dec 2005 · 6,496 accessesView PDFCite
Research ArticleOpen accessIn the abstractQuality Metric Development Framework (qMDF)K. Mustafa, R. A. KhanSeveral object-oriented metrics have been developed and used in conjunction with the quality models to predict the overall quality of software. However, it may not be enough to propose metrics. The fundamental question may be of their validity, utility and reliability. It may be much significant to be sure that these metrics are really useful and for that their construct … …Journal of Computer Science, Vol. 1, Issue 3 · 30 Sep 2005 · 7,379 accessesView PDFCite
Research ArticleOpen accessIn the abstractRole of Cytokines in the Regulation of Glioma Tumour Growth and AngiogenesisChristina Piperi, Athanasios Zisakis, Robert W. Lea, Anastasios KalofoutisMalignant glioblastomas are the most common type of primary brain tumors accounting for more than 50% of all intracranial gliomas. Due to their aggressive nature, recurrent growth, and their extremely poor prognosis for survival, research approaches have made little progress in advancing treatment of these tumours which have the ability of both modulating host immune function and neutralizing immune-based therapies. … …American Journal of Immunology, Vol. 1, Issue 3 · 30 Sep 2005 · 6,868 accessesView PDFCite
Research ArticleOpen accessIn the abstractWillingness to Pay for Air Quality Improvements in Klang Valley MalaysiaRafia Afroz, Mohd N. Hassan, Muhamad Awang, Noor A. IbrahimThis research employed contingent valuation method (CVM) to estimate the willingness to pay (WTP) of the respondents to improve the air quality in Klang Valley. The samples were divided according to different question formats i.e. open ended(OE), dichotomous choice(DC) and payment card(PC). The objective of this study is to investigate the convergent validity of contingent valuation estimates by comparing the … …American Journal of Environmental Sciences, Vol. 1, Issue 3 · 30 Sep 2005 · 8,995 accessesView PDFCite
Research ArticleOpen accessIn the abstractOptical Characterization of Lead-Bismuth Phosphate GlassesH. A.A. Sidek, M. Hamezan, A. W. Zaidan et al.Systematic series of lead-bismuth phosphate glasses, where PbO, Bi2O3 and P2O5 content change for every series based on their weight percentage have been prepared. The optical properties were measured and their amorphous nature was confirmed by X-ray diffraction technique. Both experiments were conducted at room temperature. The fundamental absorption edge for all the glasses was analyzed. The values of refractive … …American Journal of Applied Sciences, Vol. 2, Issue 8 · 31 Aug 2005 · 7,434 accessesView PDFCite