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178 articles for “expansion”
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Research ArticleOpen accessIn the abstractESTIMATIONS OF TOTAL MASS AND ENERGY OF THE OBSERVABLE UNIVERSEDimitar ValevThe recent astronomical observations indicate that the expanding universe is homogeneous, isotropic and asymptotically flat. The Euclidean geometry of the universe enables to determine the total gravitational and kinetic energy of the universe by Newtonian gravity in a flat space. By means of dimensional analysis, we have found the mass of the observable universe close to the Hoyle-Carvalho formula M∼c3/(GH). … …Physics International, Vol. 5, Issue 1 · 21 Mar 2014 · 17,715 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Non-Linear Absolutely-Stable Explicit Numerical Integration Algorithm for Stiff Initial-Value ProblemsEssam R. El-ZaharThe time-step in integration process has two restrictions. The first one is the time step restriction due to accuracy requirement τac and the second one is the time-step restriction due to stability requirement τst. The most of explicit methods have small stability regions and consequently small τst. It obliges us to solve stiff problems with small step size τst << … …American Journal of Applied Sciences, Vol. 10, Issue 11 · 11 Sep 2013 · 7,565 accessesView PDFCite
Research ArticleOpen accessIn the abstractMERGERS AND ACQUISITIONS IN THE GREEK BANKING SECTOR ADDRESSING THE PROFITABILITY QUESTIONVassilis Chouliaras, Athianos StergiosThe wave of mergers and acquisitions of financial institutions which was observed in the United States and Europe in the 1980s and 1990s seems to have affected the Greek banking market by the end of the 1990s. The result was the emergence of new significant players in the market. Despite the fact that scale economies should lead to the improvement … …Journal of Social Sciences, Vol. 9, Issue 1 · 20 Jun 2013 · 7,226 accessesView PDFCite
Research ArticleOpen accessIn the abstractDesign and Parametric Optimization of an Organic Rankine Cycle Powered by Solar EnergyFrancesco Calise, Claudio Capuozzo, Laura VanoliThis study presents the simulation and performance analysis of a regenerative and superheated Organic Rankine Cycle (ORC). To this scope, anew simulation model has been developed. The model is based on zero-dimensional energy and mass balances for all the components of the system. Shell and tube heat expanders with single shell and double tube pass have been chosen. Pump and … …American Journal of Engineering and Applied Sciences, Vol. 6, Issue 2 · 15 May 2013 · 7,692 accessesView PDFCite
Research ArticleOpen accessIn the abstractZero Geometry, Zero Space Time, The Seeds of The Final TheoryKambiz-AfrasiabiProblem statement: Lack of understanding And scientific formulation of zero geometry and zero space-time and the truth about initiation conditions would continue to keep us all in dark and we would continue to create more theories defining our observations about the known universe which could Indeed be part of our illusionary perception of reality And as long as they continue … …American Journal of Applied Sciences, Vol. 8, Issue 11 · 10 Oct 2011 · 7,851 accessesView PDFCite
Research ArticleOpen accessIn the abstractContribution of Integrated Management Systems to University Management: Case Study of the Federal University of Rio Grande Do NorteLucas A.B.D Oliveira, Natalia V.C.D Vasconcelos, Fernanda C.B.P Queiroz et al.Problem statement: The Higher Education Institutions (IHL) have intensified process of introducing undergraduate and graduate courses to more remote regions, which expanded the scope of what these institutions and allowed the formation of population of these regions. This expansion (whether by on-campus or distance learning) presents new challenges for university management and integration of the players involved in this process. … …Journal of Social Sciences, Vol. 7, Issue 3 · 18 Jul 2011 · 7,795 accessesView PDFCite
Research ArticleOpen accessIn the abstractAssessing the Environmental Impacts of Urban Growth Using Land Use/Land Cover, Water Quality and Health Indicators: A Case Study of Arequipa, PeruOswaldo Villena Carpio, Brian D. FathProblem statement: This research assesses the direct effects of urban expansion on land cover/use, river flow, water quality and the indirect effects of these variables in the rate of gastrointestinal disease in people in Arequipa, Peru through the combined use of satellite remote sensing and geographic information systems. Approach: It also uses information about demographic changes, hydrologic data and land … …American Journal of Environmental Sciences, Vol. 7, Issue 2 · 26 May 2011 · 8,744 accessesView PDFCite
Research ArticleOpen accessIn the abstractFarmers' Perception about the Extension Services and Extension Workers: The Case of Organic Agriculture Extension Program by PROSHIKAMd. Asaduzzaman Sarker, Yoshihito ItoharaProblem statement: Need of agricultural information is the basic necessity for the farmers as it plays a pivotal role in enlightening them, raising their level of knowledge and eventually help in their decision making process regarding farming activities. Extension workers with their extension services are doing this noble work. PROSHIKA a renowned NGO in Bangladesh is promoting organic agriculture among … …American Journal of Agricultural and Biological Sciences, Vol. 4, Issue 4 · 31 Dec 2009 · 8,279 accessesView PDFCite
Research ArticleOpen accessIn the abstractCytokines as Adjuvants for Vaccine and Cellular Therapies for CancerChristian M. Capitini, Terry J. Fry, Crystal L. MackallProblem statement: The development of a potent vaccine that can help treat tumors resistant to conventional cytotoxic therapies remains elusive. While part of the problem may be that trials have focused on patients with bulky residual disease, the desire to maximize responses to the vaccine remains. Approach: The gamma (γ) family of cytokines offered a unique opportunity to support the … …American Journal of Immunology, Vol. 5, Issue 3 · 30 Sep 2009 · 14,351 accessesView PDFCite
Research ArticleOpen accessIn the abstractInduced Microcracking Affects Osteoblast Attachment on Hydroxyapatite Scaffolds for Tissue EngineeringIan O. Smith, Melissa J. Baumann, Eldon D. CaseBone microdamage caused by routine activity plays an important role in triggering targeted and nontargeted bone remodeling. Targeted remodeling occurs near localized areas of microdamage[1-4]. We hypothesize that bone remodeling may be directly and positively influenced by inducing microcracks in hydroxyapatite (HA) scaffolds for bone tissue engineering. A study by Case et al. showed microcracking in HA discs having >98% … …American Journal of Biochemistry and Biotechnology, Vol. 2, Issue 3 · 30 Sep 2006 · 6,560 accessesView PDFCite