OALib Journal期刊

ISSN: 2333-9721




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匹配条件: “Rahamathulla Syed” ,找到相关结果约2206条。
Seroepidemiology of hepatitis A virus in Hyderabad, South India
Rahamathulla Syed,Aejaz Habeeb Mohammed,Prathap Kumar Sindiri,Arif Aziz Nathani
Journal of Medical and Allied Sciences , 2012,
Abstract: The present study was carried to determine the prevalence of Hepatitis A virus (HAV) IgM antibody among general population in Hyderabad since January 2002 to December 2011. A total of 4571 subjects were selected and divided into groups on the basis of age. The serum samples were screened for the presence of HAV IgM antibodies (anti-HAV IgM) using a commercially available enzyme linked immunosorbent assay (ELISA) kit. Of the 4571 serum samples, 4257 were negative and 314 (6.87%) were positive for the HAV IgM assay. The disease predominance was more in males (212) with 67.51% compared to females (102) with 32.48%. Anti-HAV seroprevalence was measured for the following age groups: Early (≤20 years), Middle (21-40 years) and Late (≥41 years). Average age-wise IgM-anti-HAV positivity from 2002-2011 was 234 of 314 in ≤20 years, 74.52%), 73 of 314 (21-40 years, 23.24%), and 7 of 314 (≥41 years, 2.22%). The present study will provide insights to the recent epidemiologic features of HAV infection in South India.
Prevalence of hepatitis C virus (HCV) coinfection in HIV infected individuals in south India and characterization of HCV genotypes
Ponamgi SPD,Rahamathulla S,Kumar Y,Chandra M
Indian Journal of Medical Microbiology , 2009,
Abstract: Purpose: To determine anti-HCV antibodies and genomic subtype of HCV in 1487 confirmed human immunodeficiency virus (HIV) positive samples. Methods: A total of 1487 confirmed HIV-positive samples were tested for anti-HCV antibodies by using a third generation ELISA kit (Ortho 3.0) and by RT PCR for HCV. HIV and HCV coinfected samples were selected for HCV genotyping by RFLP and subtyping with NS5-type specific primers. Results: A total of 1487 HIV-infected serum samples were screened for HCV infection, of which, a 1443 (97.04%) were negative and 45 (3.02%) were coinfected. HIV-HCV coinfection was predominant in the age group 41-50 years (51.1%). HCV genotyping and subtyping was done for the 45 HCV RNA-positive specimens of which genotype 1 was observed in 31 (68.8%) and genotype 3 was observed in 14 (31.1%) subjects. Further subtyping analysis showed the genotype 1b in 23 (51.1%), 1a in eight (17.7%), 3a in 10 (22.2%) and 3b in four (8.8%) subjects. Conclusion: HIV and HCV seroprevalence is higher in South India, and the most prevalent genotype in coinfection was genotype 1b.
Prediction and rate of infections in diabetes mellitus patients with diabetes ketoacidosis in Penang, Malaysia  [PDF]
Syed Wasif Gillani, Syed Azhar Syed Sulaiman, Shameni Sundram
Open Journal of Epidemiology (OJEpi) , 2012, DOI: 10.4236/ojepi.2012.21001
Abstract: Study aimed to determine the rate and prediction of infection in diabetes mellitus patients ≥18 year, with diabetic ketoacidosis (DKA). Retrospective cohort study design was adopted to achieve the objectives. Universal sampling technique was employed for data collection among Diabetes ketoacidosis patients, over a period of 3 years (Jan 2008-Dec 2010). Statistical package for social sciences used to analyze data. Over a 3-year period, total of 967 admissions were identified. Of it, 112 (11.6%) with no infection, 679 (70.2%) with bacterial infection and 176 (18.2%) with presumed viral infection. The mean WBC for all the patients was 18,177 (±9431). 721 (74.6%) had leukocytosis, as defined by a WBC ≥ 15,000/mm3. WBC, differential, leukocytosis, as well as sex, temperature were not significant predictors (p > 0.05) of bacterial infection. There was significant (p < 0.05) difference of age between the 3 groups, age above 57 years have high rate of infection as compared to age below and equal 57 years. The infection rate in elderly patients with DKA was high and majority of them had lack of clinical evidence. Major bacterial infections with potential serious sequel were particularly common (33.3%), among every third patient being presumed to have serious consequences.
Measuring Porosity of Anodes in Solid Oxide Fuel Cell (SOFC) through Water Archimedeans Porosimetry  [PDF]
Syed Mubashar Hassan, Syed Ali Hasnain
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.36005
Abstract: The present research is aimed to measure the porosity of anodes in solid oxide fuel cell through water Archimedeans method. There are various alternatives available to replace fossil fuel cells like nuclear power, wind energy, solar energy, bio fuel, and geothermal and fuel cells. Among all the alternatives of fossil fuel, one form of energy production that stands out from the rest and promises a sustainable future energy is fuel cell. Moreover, it offers many advantages in contrast to other forms of energy generation. An Archimedean approach for water immersion porosimetry is carried out. Some of the results are beyond rational limits, and given negative and sometime above 100 percent porosity. The reasons for these unacceptable results are either due to water ingress into the sample or the sample turns into buoyant due to air in the cling film. The results from Archimedean porosimetry should only be used qualitatively due to errors associated with the results. It is also noted that Archimedean porosimetry is not the ideal technique for measuring the porosity of coated samples. It is suggested that larger samples should be analyzed that will help to minimize the weighing errors.
Job Satisfaction and Organizational Commitment among Employees in the Sultanate of Oman  [PDF]
Syed Mohammad Azeem
Psychology (PSYCH) , 2010, DOI: 10.4236/psych.2010.14038
Abstract: This study investigated the nature of relationships of demographic factors (age and job tenure) and job satisfaction facets with organizational commitment. The study also sought to determine the impact of demographic factors and job satisfaction facets on organizational commitment. A sample consists of 128 employees from service industry selected randomly. Employees were given a Job Descriptive Index (JDI) questionnaire and the Organizational Commitment questionnaire (OCQ). Pearson’s product moment correlation coefficient and multiple regression analyses were used to analyze the data. The Results of the study show that the mean values of job satisfaction and organizational commitment are at moderate side. A moderate significant positive relationship was found among job satisfaction facets, demographic factors, and organizational commitment. Supervision, pay, overall job satisfaction, age, and job tenure were the significant predictors of organizational commitment.
On the Zeros of a Polynomial  [PDF]
Mohammad Syed Pukhta
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.211189
Abstract: In this paper we consider the problem of finding the estimate of maximum number of zeros in a prescribed region and the results which we obtain generalizes and improves upon some well known results.
Vibration Analysis of an Infinite Poroelastic Circular Cylindrical Shell Immersed in Fluid  [PDF]
Syed Ahmed Shah
Open Journal of Acoustics (OJA) , 2012, DOI: 10.4236/oja.2012.22010
Abstract: The purpose of this paper is to study the effect of presence of fluid within and around a poroelastic circular cylindrical shell of infinite extent on axially symmetric vibrations. The frequency equation each for a pervious and an impervious surface is obtained employing Biot’s theory. Radial vibrations and axially symmetric shear vibrations are uncoupled when the wavenumber is vanished. The propagation of axially symmetric shear vibrations is independent of presence of fluid within and around the poroelastic cylindrical shell while the radial vibrations are affected by the presence of fluid. The frequencies of radial vibrations and axially symmetric shear vibrations are the cut-off frequencies for the coupled motion of axially symmetric vibrations. The non-dimensional phase velocity as a function of ratio of thickness to wavelength is computed and presented graphically for two different types of poroelastic materials for thin poroelastic shell, thick poroelastic shell and poroelastic solid cylinder.
Convex Phillips Curve Explaining Openness and Inflation Nexus  [PDF]
S. Ali Shah Syed, Helène Syed Zwick
Theoretical Economics Letters (TEL) , 2015, DOI: 10.4236/tel.2015.56086
Abstract: We study the theoretical nexus between inflation and trade openness in the presence of a non-linear Phillips curve. Phillips curve explains the inverse relationship between unemployment and inflation; however, the open economy macroeconomic models usually propose that the slope of the trade-off should be related to the extent of trade openness. The role of openness as a check on inflation has recently attracted attention of many [1]. The parallelism between the recent globalization wave and the fall in inflation has led to a perception that the determinants of the slowdown in inflation were not only the domestic ones but could partly be due to increased trade openness. This study describes this relationship considering a non-linear Phillips curve. Using the conventional Phillips curve approximated by Cobb-Douglas model we confirm the earlier observations regarding the existence of a significant impact of openness on inflation. The interesting contribution of this study is not only to establish the trade-openness and inflation nexus but also to identify the relevant channels through which openness impacts inflation. Our model predicts that in the current scenario of increased openness a non-linear symmetric loss function may still prevail, but for the policy purposes it necessitates to consider domestic and foreign propensities to import and the exchange rate sensitivity to inflation. In addition, the integration of the international markets would result into an even more important role of exchange rate dynamics as a response to the rising international trade. We find that in the presence of a convex Phillips curve any upward variation in the foreigners’ propensity to import would place a downward pressure on domestic inflation, provided that the current and the lagged rate of unemployment are less than minimum unemployment rate. Our model, while assessing the short run dynamics, also suggests that increased openness results into a complex divide among different economies, due to their sizes and structures. Investigating such a relationship as an extension of this study for different economic groups could reveal further interesting facts.
On Axially Symmetric Vibrations of Fluid Filled Poroelastic Spherical Shells  [PDF]
Syed Ahmed Shah, Mohammed Tajuddin
Open Journal of Acoustics (OJA) , 2011, DOI: 10.4236/oja.2011.12003
Abstract: Employing Biot’s theory of wave propagation in liquid saturated porous media, waves propagating in a hollow poroelastic closed spherical shell filled with fluid are studied. The frequency equation of axially symmetric vibrations for a pervious and an impervious surface is obtained. Free vibrations of a closed spherical shell are studied as a particular case when the fluid is vanished. Frequency as a function of ratio of thickness to inner radius is computed in absence of dissipation for two types of poroelastic materials each for a pervious and an impervious surface. Results of previous works are obtained as a particular case of the present study.
On the Performance of ISFET-based Device for Water Quality Monitoring  [PDF]
Pawan Whig, Syed Naseem Ahmad
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2011, DOI: 10.4236/ijcns.2011.411087
Abstract: A new configuration realizing water quality monitoring device using ISFET involving low power CMOS Integrated “Ion Sensitive Field Effect transistor (ISFET) – Operational Amplifier is presented. The study’s main focus is on simulation of power and performance analysis of ISFET device, which is used for water quality monitoring. This approach can improve calibration of device to a fairly wide range without the use of a high speed digital processor. The conventional device has a drawback of slow slew rate but in this novel design, the device has a better slew rate. A new slew rate enhancement (SRE) incorporated into a ISFET, which does not affect the small signal frequency response. The functionality of the circuit is tested using Tanner simulator version 15 for a 70nm CMOS process model also the transfer function realization is done on MATLAB R2011a version, the Very high speed integrated circuit Hardware description language(VHDL) code for the same scheme is simulated on Xilinx ISE 10.1 and various simulation results are obtained. Simulation results are included to demonstrate the results.

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