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Search Results: 1 - 10 of 224133 matches for " Asim R. "
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Cosmological mass functions and moving barrier models
Asim Mahmood,R. Rajesh
Physics , 2005,
Abstract: In the ellipsoidal collapse model, the critical density for the collapse of a gravitationally bound object is a function of its mass. In the excursion set formalism, this translates into a moving barrier problem such that the mass function of dark matter haloes is given by the first crossing probability of a random walker across the barrier. In this paper, we study this first crossing probability analytically. Complete solutions are obtained for barriers that vary as square root of time and square of time. Large and small time asymptotic behaviour is derived. For arbitrary power-law barriers, the large time behaviour is determined. The solutions allow us to derive useful inferences about the scaling of the conditional mass function in terms of present day halo masses and look back redshifts. As an application of our results, we compare the estimates of major merger rates of haloes in constant and moving barrier models and find that for massive haloes ($10^{12-13} M_\odot$) the latter predicts significantly higher merger rates towards high redshifts ($z \gtrsim 4$)
Cadmium Toxicity in Plants and Role of Mineral Nutrients in Its Alleviation  [PDF]
Rahat Nazar, Noushina Iqbal, Asim Masood, M. Iqbal R. Khan, Shabina Syeed, Nafees A. Khan
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.310178
Abstract: Cadmium (Cd) is a toxic heavy metal that enters the environment through various anthropogenic sources, and inhibits plant growth and development. Cadmium toxicity may result from disturbance in plant metabolism as a consequence of disturbance in the uptake and translocation of mineral nutrients. Plant nutrients and Cd compete for the same transporters and, therefore, presence of Cd results in mineral nutrients deficiency. The optimization of mineral nutrients under Cd stress could reduce Cd toxicity by greater availability at the transport site resulting in reduced accumulation of Cd, and could also alleviate Cd-induced toxic effects by enhancing biochemical reactions and physiological processes in plants. In the present review the role of plant macro, micro and beneficial elements in alleviating Cd stress in crop plants is discussed.
Estimation of HCV viral load and liver enzymes among different patients groups of District Gujrat, Pakistan  [PDF]
Asim Mushtaq, Mujahid Azeem Tariq, Umer Rashid, Amber Afroz, Nadia Zeeshan, Abdul R. Asif, Muzna Zahur
Advances in Bioscience and Biotechnology (ABB) , 2013, DOI: 10.4236/abb.2013.49115
Abstract:

Hepatitis C has a 3% of the global disease burden that remains endemic in many regions of the world. According to a general statistical survey it has approximately 5.3% seroprevalence in Pakistan. HCV is a persistent and silent disease thus making the primary diagnosis complicated. Occasionally HCV positive population could not be diagnosed by routine HCV antibody testing therefore requires molecular diagnosis. This study is aimed to determine the prevalence of HCV and to estimate the HCV viral load by quantitative analysis among different patient groups of District Gujrat, Pakistan. A total of 597 samples were collected from clinically diagnosed liver patients that were categorized into three age groups: 1) up to 25 years; 2) 26-50 years 3) above 50 years. All samples were subjected to real time PCR for determination and quantification of HCV RNA. Activity of liver aminotransferases was measured. The overall prevalence of HCV-RNA was 73.87%. Females had slightly higher HCV prevalence which is 74.06% while 73.45% in males. Highest prevalence of active HCV infection was found in age group 26-50. In addition, liver function tests showed that 28.12% HCV-positive patients do not have elevated ALT level whereas 32.65% did not show elevated AST levels. It may be assumed that there is not a significant relationship between increased viral load and liver amino transferases. The study concluded a significantly higher rate of HCV infection in young population. Moreover screening with antibody and liver function tests alone does not exclude the possibility of HCV infection.

Castrate Resistant Metastatic Prostate Cancer: Options for a Patient in 2012  [PDF]
Asim Ahmad, Winston Tan
Open Journal of Urology (OJU) , 2012, DOI: 10.4236/oju.2012.223037
Abstract: Castrate resistant metastatic prostate cancer remains a fatal disease. Through preclinical studies and clinical trials, a multitude of options have been made available to prolong the life of these patients, as well as improve quality of life. First line treatment options following tumor progression after androgen deprivation therapy include Provenge and docetaxel. Several options are available as second line treatment, including cabazitaxel, abiraterone, and enzalutamide. Many drugs currently being studied are very promising, such as alpharadin. Here we review treatment options for patients suffering from disease progression after androgen deprivation therapy, and offer a review of the current available options for the clinician.
Online Data Processing Methods in Xlet Applications for Seismic Early Warning and Emergency Services on Interactive Digital Television  [PDF]
Mustafa Asim Kazancigil
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2013, DOI: 10.4236/ijcns.2013.65025
Abstract:

In this paper, I described the methods that I used for the creation of Xlets, which are Java applets that are developed for the IDTV environment; and the methods for online data retrieval and processing that I utilized in these Xlets. The themes that I chose for the Xlets of the IDTV applications are Earthquake and Tsunami Early Warning; Recent Seismic Activity Report; and Emergency Services. The online data regarding the Recent Seismic Activity Report application are provided by the Kandilli Observatory and Earthquake Research Institute (KOERI) of Bogazici University in Istanbul; while the online data for the Earthquake and Tsunami Early Warning and the Emergency Services applications are provided by the Godoro website which I used for storing (and retrieving by the Xlets) the earthquake and tsunami early warning simulation data, and the DVB network subscriber data (such as name and address information) for utilizing in the Emergency Services (Police, Ambulance and Fire Department) application. I have focused on the methodologies to use digital television as an efficient medium to convey timely and useful information regarding seismic warning data to the public, which forms the main research topic of this paper.

Pregnancy and Loneliness: The Therapeutic Value of 3D/4D Ultrasound  [PDF]
Ulrich Honemeyer, Asim Kurjak
Psychology (PSYCH) , 2014, DOI: 10.4236/psych.2014.57085
Abstract:

The fetal sensual and motoric equipment and its successful development within the maternal organism on the one hand, and the harmonic psycho-physic transformation and maturation of the woman into a mother on the other hand, are linked in dialectic inter-dependence. We describe situations in which the harmony of this process is disturbed. Visualization of the fetus in 3D and real time 3D (4D) can influence parental phantasies of the unborn, improve compromised bonding, or create bonding between fetus and (foster)-parents, and support understanding and even acceptance of fetal pathology.

Exact Solution to Nonlinear Differential Equations of Fractional Order via (G’/G)-Expansion Method  [PDF]
Muhammad Younis, Asim Zafar
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.51001
Abstract:

In this article, a new application to find the exact solutions of nonlinear partial time-space fractional differential Equation has been discussed. Firstly, the fractional complex transformation has been implemented to convert nonlinear partial fractional differential Equations into nonlinear ordinary differential Equations. Afterwards, the (G'/G)-expansion method has been implemented, to celebrate the exact solutions of these Equations, in the sense of modified Riemann-Liouville derivative. As application, the exact solutions of time-space fractional Burgers’ Equation have been discussed.

Cross-Scale Value Trade-Offs in Managing Social-Ecological Systems: The Politics of Scale in Ruaha National Park, Tanzania
Asim Zia,Paul Hirsch,Alexander Songorwa,David R. Mutekanga
Ecology and Society , 2011, DOI: 10.5751/es-04375-160407
Abstract: Management of social-ecological systems takes place amidst complex governance processes and cross-scale institutional arrangements that are mediated through politics of scale. Each management scenario generates distinct cross-scale trade-offs in the distribution of pluralistic values. This study explores the hypothesis that conservation-oriented management scenarios generate higher value for international and national scale social organizations, whereas mixed or more balanced management scenarios generate higher value for local scale social organizations. This hypothesis is explored in the management context of Ruaha National Park (RNP), Tanzania, especially the 2006 expansion of RNP that led to the eviction of many pastoralists and farmers. Five management scenarios for RNP, i.e., national park, game reserve, game control area, multiple use area, and open area, are evaluated in a multicriteria decision analytical framework on six valuation criteria: economic welfare; good governance; socio-cultural values; social equity; ecosystem services; and biodiversity protection; and at three spatial scales: local, national, and international. Based upon this evaluation, we discuss the politics of scale that ensue from the implementation of management alternatives with different mixes of conservation and development goals in social-ecological systems.
The Nexus between Higher Education and Economic Growth: An Empirical Investigation for Pakistan
Amatul R. Chaudhary,Asim Iqbal,Syed Yasir Mahmood Gillani
Pakistan Journal of Commerce and Social Sciences , 2009,
Abstract: The study investigates the role of higher education in economic growth for Pakistan between 1972 and 2005 using the application of Johansen Cointegration and Toda & Yamamoto (1995) Causality approach in Vector Autoregressive (VAR) framework. It examines whether higher education affect long run economic growth in Pakistan. The empirical analysis reveals that there is a long run relationship between economic growth and higher education, which suggests that these variables are necessary for each other. The empirical results of causality test indicate that there exists a unidirectional causality running from economic growth to higher education and no other direction of causality found between these variables.
Occupational injuries: Is job security a factor?
Saha Asim,Kulkarni P,Chaudhuri R,Saiyed H
Indian Journal of Medical Sciences , 2005,
Abstract: Context: Although a large number of contributing factors of occupational injury causation are explored meticulously to explain the phenomenon of higher occupational injury occurrence in some subjects, it has remained a matter of controversy. Aims: In this study, an effort is made to explore whether job security has any contribution in explaining higher susceptibility of some workers. Settings and Design: This was a retrospective occupational injury record study conducted in an industry of eastern India. Materials and Methods: Along with the study of injury records of 5 years, an interview was also conducted involving 726 workers (including permanent and temporary workers both) of the factory. Statistical analysis used:0 Comp arison was made between permanent and temporary workers by using the Mann-Whitney U-test and the chi-square test. A theoretical model of Poisson′s distribution was used to compare between expected and real occurrence. Results: Although two worker groups were very similar in relation to age, level of education, habits, and nature of work, accident frequency and severity rates were found to be significantly higher in temporary workers. Conclusions: This study concluded that the higher accident risk of the temporary workers might have been due to the less effective experience as well as due to lack of job security inherent in such workers.
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