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Search Results: 1 - 10 of 224098 matches for " R. Suleiman "
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A Model of Dark Matter and Dark Energy Based on Relativizing Newton’s Physics  [PDF]
Ramzi Suleiman
World Journal of Condensed Matter Physics (WJCMP) , 2018, DOI: 10.4236/wjcmp.2018.83009
Abstract: The nature and properties of dark matter and dark energy in the universe are among the outstanding open issues of modern cosmology. Despite extensive theoretical and empirical efforts, the question “what is dark matter made of?” has not been answered satisfactorily. Candidates proposed to identify particle dark matter span over ninety orders of magnitude in mass, from ultra-light bosons, to massive black holes. Dark energy is a greater enigma. It is believed to be some kind of negative vacuum energy, responsible for driving galaxies apart in accelerated motion. In this article we take a relativistic approach in theorizing about dark matter and dark energy. Our approach is based on our recently proposed Information Relativity theory. Rather than theorizing about the identities of particle dark matter candidates, we investigate the relativistic effects on large scale celestial structures at their recession from an observer on Earth. We analyze a simplified model of the universe, in which large scale celestial bodies, like galaxies and galaxy clusters, are non-charged compact bodies that recede rectilinearly along the line-of-sight of an observer on Earth. We neglect contributions to dark matter caused by the rotation of celestial structures (e.g., the rotation of galaxies) and of their constituents (e.g., rotations of stars inside galaxies). We define the mass of dark matter as the complimentary portion of the derived relativistic mass, such that at any given recession velocity the sum of the two is equal to the Newtonian mass. The emerging picture from our analysis could be summarized as follows: 1) At any given redshift, the dark matter of a receding body exists in duality to its observable matter. 2) The dynamical interaction between the dark and the observed matter is determined by the body’s recession velocity (or redshift). 3) The observable matter mass density decreases with its recession velocity, with matter transforming to dark matter. 4) For redshifts z < 0.5, the universe is dominated by matter, while for redshifts z > 0.5 the universe is dominated by dark matter. 5) Consistent with observational data, at redshift z = 0.5, the densities of matter and dark matter in the universe are predicted to be equal. 6) At redshift equaling the Golden Ratio (z ≈ 1.618), baryonic matter undergoes a quantum phase transition. The universe at higher redshifts is comprised of a dominant dark matter alongside with quantum matter. 7) Contrary to the current conjecture that dark energy is a negative vacuum energy that might interact with dark matter,
Social Order in Sociology: Its Reality and Elusiveness  [PDF]
Sabo Suleiman Kurawa
Sociology Mind (SM) , 2012, DOI: 10.4236/sm.2012.21004
Abstract: In the past, as well as in the present, depending on certain circumstances, sociologists tend to espouse one or the other of the contradictory answers proposed by political philosophers: social order is the result of some people being able to coerce others into obedience; or it rests on the general agreement among the members of the society; or it stems from their striking bargains with each other which are to every one’s individual advantage as well as the collective advantage. I argue that it is unhelpful to consider these viewpoints as mutually exclusive categories. For the sociologist, social order must be a matter for empirical investigation. It is obvious that each of the above stated old philosophical views has its own grain of truth inherent in it, for each comes near to describing what is observed in some societies, or part of societies, of different types, at different periods of history, in particular situations or circumstances. But to consider each, as a ‘theory’ of social order of universal validity, is to put it mildly unrealistic or absurd. To escape from this unrealistic approach which pervades some sociological discussions of social order it is pertinent to remember that social harmony is very often not achieved, and that social order and disorder are very much relative terms. I therefore posit that the actual state of relative order to disorder in a particular society or part of society is the outcome of complex forces of dependence and interdependence, of cooperation and conflict, of strength and weakness, of alliance and cleavage between people and groups. Thus, in this paper, a treatise is put forward, for the emergence of social order within the context of the theories of social integration and conflict in sociology. The essence is to describe how social order emanates under different circumstances with a view to analyzing its reality and elusiveness in daily social interactions in society. It appears that reality is in some sense Janus-faced (integration and conflict being the two unpropitious faces) and, despairing of ever encompassing both aspects in one theoretical framework. The big question is that: should the choice of reality be left to the whim of each sociologist?
Prevalence of Gingival Biotype in a Syrian Population and Its Relation to Tooth Shapes: A Cross-Sectional Study  [PDF]
Haydar Barakat, Suleiman Dayoub
Journal of Biomedical Science and Engineering (JBiSE) , 2016, DOI: 10.4236/jbise.2016.93010
Abstract: Background: Gingival biotype is one of the most important factors that impede success in dental treatments; it affects the outcomes of periodontal surgery, and restorative treatments. Researchers classified gingival biotypes into thin biotype and thick biotype. It is crucial to identify tissue biotype before treatment. Aim of Study: To determine the prevalence of gingival biotypes in a Syrian population, in addition, to study the distribution of gingival biotypes according to gender and tooth shape. Material and Methods: This cross sectional study included 500 volunteers (300 males and 200 females) from the patients who had visited the department of periodontology-dental faculty at Damascus University. Gingival thickness was assessed to determine the gingival biotype for the maxillary central incisors using the direct measurement technique (Trans-gingival probing). Shapes of the maxillary incisors were recorded. A written informed consent was taken from each patient. Statistical analysis was done using test k2 p < 0.05. Results: The mean age was 26.8 ± 4.4 years. Thick gingival biotype was detected in 58.4% of the sample and most of patients are men while the prevalence of thin gingival biotype was 41.6% of the sample. It was also observed that patients with thin gingival biotype had triangular tooth shape in 99.5% (p < 0.05). Conclusion: Thick gingival biotype was observed to be more prevalent in a Syrian population than thin biotype. Most Syrian males had thick gingival biotype with square tooth shape while females had thinner biotype and triangular tooth shape.
Effect of Translatory Motion on Dynamics Heat and Mass Transfer of Vapor Bubble Radially Oscillating in a Liquid  [PDF]
Nail Suleiman Khabeev
Journal of Applied Mathematics and Physics (JAMP) , 2019, DOI: 10.4236/jamp.2019.74063
Abstract: The phase transitions and the effect on this process of two factors: relative motion and the external influence of the carrier flow (pressure perturbation) are investigated. A mathematical model describing all the stages of the phenomenon is constructed. The model includes mass, momentum and energy balance equations (both for the vapor and for the liquid) or their first integrals.
Socio-cultural factors influencing the prevalence, care and support inHIV/AIDS among the Yoruba of Southwestern Nigeria
AA Suleiman
African Journal of Health Sciences , 2007,
Abstract: This paper is a part of a bigger ethnographic study conducted in two states from the Yoruba society of the Southwestern Nigeria to examine the social and cultural factors influencing the prevalence of HIV/AIDS and care and support systems in those states. This is in recognition of the need to arrest the increasing rate of the spread of the epidemic and the desire to create better care for People Living with HIV/AIDS (PLWAs) in those states. The study employed both qualitative and quantitative methods using key-informant interviews, in-depth interviews, focus group discussions and case-study analyses. The study engaged in intensive fieldwork, which lasted for 24 months. The study examined in historical perspective, the condition of health facilities in the study area before the outbreak of HIV/AIDS and how such facilities have coped with HIV/AIDS. The study revealed that the socio-cultural condition of the society is not conducive to fighting HIV/AIDS. Poverty, low literacy capacity, the urbanization process, inadequate health care facilities, the location of tertiary institutions, and certain contesting issues in HIV/AIDS were found to account for the continued prevalence of HIV/AIDS in the study-area. In addition to the above, is the neglect of rural communities in HIV/AIDS programmes, despite the fact that PLWAs often return to their rural communities after contracting HIV/AIDS in their urban residence. HIV/AIDS is seen as a disease associated with human development, hence, action against the disease should involve the overhauling of the entire development process in the community studied. African Journal of Health Sciences Vol. 14 (1-2) 2007: pp. 61-69
Determintation of sulfor containing glucosides in Brassica nepus L. and Sinappis alba L. tissue cultures
Suleiman Afsharypuor
DARU : Journal of Pharmaceutical Sciences , 1993,
Abstract: In this study, hypocotyls of 5 day old seedlings of Brassica nepus L. and Sinappis alba L.. were explanted onto Murashige and Skoog's revised Tobaco Medium(l)containing different concentrations of suitable plant growth regulators (a cytokinin and an auxin). In addition to the plant growth regulators, potassium sulfate(in a concentration of 3 m. eq./liter) was added to some solid and liquid media in an attempt to raise available sulfate levels, to other medium, L - B- Phenylalanine was added (in a concentration of 30 m. eq./liter) to act possibly as a precursor for the biosynthesis of sulfor containing glucoside (glucosinolate). Suspension cell cultures were initiated from callus and grown in the same medium without agar. Calli which were harvested at 20 weeks and cells at 6 weeks after subculture, were dried and examined by capillary GC for the presences of sulfor containing glucosides. The obtained results indicated the absence of such glucosides in the cells and calli.
Encefalopatía hiperamoniémica: valoración y manejo nutricional a propósito de un caso Hyperammonemic encephalopathy: nutritional assessment and management of a case
R. Oliva Rodríguez,Y. Suleiman Martos,J. L. Pereira Cunnil,P. Serrano Aguayo
Nutrición Hospitalaria , 2012,
Abstract: El déficit de Ornitintranscarbamilasa (OTC) es un trastorno del ciclo de la urea ligado al cromosoma X. Se manifiesta en el varón como hiperamoniemia severa en los primeros días de vida. En la mujer la enfermedad es más leve. Diversas situaciones pueden provocar una descompensación con hiperamoniemia que puede ser letal o provocar da os neurológicos permanentes. Presentamos una mujer de 36 a os que ingresó para cirugía y que sufrió una descompensación coincidiendo con infección de la herida quirúrgica. La hiperamoniemia provocó un deterioro neurológico con disminución del nivel de conciencia, tetraparesia y disfagia neurógena. Con tratamiento, que consistió en dieta hipoproteica, quelantes de amonio y medidas dialíticas, se consiguió controlar la hiperamoniemia y mejorar el estado neurológico. Este caso ilustra la importancia del soporte nutricional especializado de los pacientes con trastornos del ciclo de la urea en el ámbito hospitalario por darse frecuentemente situaciones que favorecen las descompensaciones. OTC deficiency is a disorder of the urea cycle X-linked. It is manifested in men as severe hyperammonemia in the first days of life. In women the disease is milder severity. Various conditions cause decompensation with hyperammonemia. It could be fatal or cause permanent neurological damage. We report a 36 years old woman admitted for surgery, she suffered a decompensation in conjunction with surgical wound infection. Hyperammonemia caused neurological deterioration with decreased level of consciousness, tetraparesis and neurogenic dysphagia. The treatment consisting of low-protein diet, ammonium chelating drugs and dialytic measures, was effective in controlling hyperammonaemia and improving neurological status. This case illustrates the importance of nutritional support of patients with disorders of the urea cycle in the hospital because the descompensations are more frecuent here.
Economic Effects of Fascioliasis on Animal Traction Technology in Adamawa State, Nigeria
M.R. Jaafar-Furo,S.I. Mshelia,A. Suleiman
Journal of Applied Sciences , 2008,
Abstract: This study reports the results of a survey conducted in 2001 to investigate the economic effects of Fascioliasis (Liverflukes) on drought animals in Adamawa State, Nigeria. Data were collected from 60 and 74 farmers` owners of 148 non-infested and 204 infested drought animals, respectively, through a cost-route method using structured questionnaires and supplemented with interviews. Analysis using descriptive statistics and animal traction efficiency measure showed that the non-infested drought animals were efficiently utilized than the infested drought animals. It was concluded that the non-infested drought animals were more productive. The study therefore, recommend among others, the regular deworming of drought animals in order to improve their efficiency.
Assessing Internal Software Quality Attributes of the Object-Oriented and Service-Oriented Software Development Paradigms: A Comparative Study  [PDF]
Yaser I. Mansour, Suleiman H. Mustafa
Journal of Software Engineering and Applications (JSEA) , 2011, DOI: 10.4236/jsea.2011.44027
Abstract: Service-Oriented Architecture (SOA) is becoming the dominant approach for developing and organizing distributed enterprise-wide applications. Although the concepts of SOA have been extensively described in the literature and in-dustry, the effects of adopting SOA on software quality are still unclear. The aim of the paper is to analyze how adopt-ing SOA can affect software quality as opposed to the Object-Oriented (OO) paradigm and expose the differential implications of adopting both paradigms on software quality. The paper provides a brief introduction of the architectural differences between the Service-Oriented (SO) and OO paradigms and a description of internal software quality metrics used for the comparison. The effects and differences are exposed by providing a case study architected for both paradigms. The quantitative measure concluded in the paper showed that a software system developed using SOA approach provides higher reusability and lower coupling among software modules, but at the same time higher complexity than those of the OO approach. It was also found that some of the existing OO software quality metrics are inapplicable to SOA software systems. As a consequence, new metrics need to be developed specifically to SOA software systems.
Modelling Livestock Activities and Environmental Sustainability: The African Case  [PDF]
Eisa Abdalla Abdelgalil, Suleiman Ibrahim Cohen
Journal of Environmental Protection (JEP) , 2010, DOI: 10.4236/jep.2010.11001
Abstract: This paper develops a dynamic model of grazing land degradation. The model illustrates the relationship between live-stock levels and grazing land degradation over time. It identifies the mechanisms by which the factors internal to the livestock local production system and those drawn from the larger economic context of livestock marketing influence livestock-grazing land relationship. The paper shows that overstocking leads to degradation which leads to declining relative prices of livestock as quality declines and mortality increases. As relative price of livestock falls, consumption increases. The increased consumption and mortality ultimately leads to lower livestock population, which leads to de-creased degradation. The model results show that medium term dynamics of grazing land degradation are quite differ-ent from long term dynamics. It is shown that although grazing land sustainability situation is adverse in the medium term, yet it is favourable in the long term. The livestock system is dynamic and can adjust when longer term system dy-namics are allowed to play out. Part of the adjustment mechanism is built in the livestock system and the other part comes from the economic system. The built-in adjustment mechanism works through the two-way relationship between the stock and degradation. The external adjustment mechanism, originating from the economic system, works through economic growth, relative prices and foreign trade. In the medium term, opportunistic management strategy and poli-cies that facilitate access to grazing land and water are crucial for mitigating degradation. The results suggest that the views of the mainstream range management paradigm and the new thinking of range ecology can be reconciled.
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