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Search Results: 1 - 10 of 2655 matches for " Sifat Hussain "
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Numerical Solution for Accelerated Rotating Disk in a Viscous Fluid  [PDF]
Sajjad Hussain, Farooq Ahmad, Mohammad Shafique, Sifat Hussain
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.46124
Abstract: The problem of a disk rotating in a viscous fluid has been investigated. The disk is accelerated with angular velocity proportional to time. Employing suitable similarity transformations the governing partial differential equations are transformed in to ordinary differential form. The resulting equations are solved numerically using SOR method and Simpson’s (1/3) rule. The results have been improved by using Richardson’s extrapolation. The effect of the non-dimensional parameter s which measures unsteadiness is observed on velocity components, skin friction coefficient and torque of the disk.
New Ninth Order J-Halley Method for Solving Nonlinear Equations  [PDF]
Farooq Ahmad, Sajjad Hussain, Sifat Hussain, Arif Rafiq
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.412233
Abstract:

In the paper [1], authors have suggested and analyzed a predictor-corrector Halley method for solving nonlinear equations. In this paper, we modified this method by using the finite difference scheme, which had a quantic convergence. We have compared this modified Halley method with some other iterative methods of ninth order, which shows that this new proposed method is a robust one. Some examples are given to illustrate the efficiency and the performance of this new method.

Numerical Solution for a Similar Flow between Two Disks in the Presence of a Magnetic Field  [PDF]
Sajjad Hussain, Muhammad Anwar Kamal, Farooq Ahmad, Muhammad Ali, Muhammad Shafique, Sifat Hussain
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.48155
Abstract:

Numerical solutions are obtained for non-steady, incompressible fluid flow between two parallel disks which at time t are separated by a distance H(1-αt)1/2 and a magnetic field proportional to B0(1-αt) -1/2 is applied perpendicular to the disks where H denotes a representative length, BO denotes a representative magnetic field and α-1 denotes a representative time. Similarity transformations are used to convert the governing partial differential equations of motion in to ordinary differential form. The resulting ordinary differential equations are solved numerically using SOR method, Richardson extrapolation and Simpson’s (1/3) Rule. Our numerical scheme is straightforward, efficient and easy to program.

FOURTH-ORDER CONVERGENT TWO-STEP ITERATIVE ALGORITHM FOR SOLVING NON-LINEAR EQUATIONS
Muhammad Raza,Farooq Ahmad,Sifat Hussain
Academic Research International , 2012,
Abstract: In this paper we present fourth-order convergent two-step iterative algorithm for solving non-linear equations. This algorithm is refinement of the existing iterative algorithms. Numerical experiment shows this fact.
NEW DERIVATIVE FREE ITERATIVE METHOD FOR SOLVING NON-LINEAR EQUATIONS
Farooq Ahmad,Sifat Hussain,Muhammad Raza
Academic Research International , 2012,
Abstract: Several iterative methods have been proposed and analyzed in the literature for solving non-linear equation, nf(x) = 0. Recently Wu et al have suggested derivative free method for solving non-linearequations. Other well-known methods with derivatives create numerical difficulties or fail to converge in neighborhood of the required root. In this paper, we propose and analyze two two-step derivative free algorithms. The numerical tests show that the new two-step algorithms are comparable with the existing algorithms and are successful in case where the existing algorithms fail to converge or have numerical difficulties.
Exploring the gap between hand washing knowledge and practices in Bangladesh: a cross-sectional comparative study
Sifat E Rabbi, Nepal C Dey
BMC Public Health , 2013, DOI: 10.1186/1471-2458-13-89
Abstract: This study is a cross-sectional comparative study between baseline (2006), midline (2009) and end-line (2011) surveys in 50 sub-districts from the first phase of the programme. Thirty thousand households from 50 sub-districts were selected in two steps: i) 30 villages were selected from each sub-district by cluster sampling, and ii) 20 households were chosen systematically from each village. The matched households were considered (26,404 in each survey) for analysis. Data were collected from households through face-to-face interview using a pre-tested questionnaire. Respondents were the adult female members of the same households, who had knowledge of day-to-day household activities related to water, sanitation and hygiene.A gap between perception and practice of proper hand washing practices with soap was identified in the study areas. Hand washing practice with soap before eating was much lower than after defecation. In baseline data, 8% reported to wash their hands with soap which significantly increased to 22% in end line. Hand washing knowledge and practices before cooking food, before serving food and while handling babies is considerably limited than other critical times. A multivariate analysis shows that socio-economic factors including education of household head and respondent, water availability and access to media have strong positive association with hand washing with soap.Gap between knowledge and practice still persists in hand washing practices. Long term and extensive initiatives can aware people about the effectiveness of hand washing.Hygiene promotions enhance the effectiveness of water and sanitation programme in most of the developing countries [1]. Hygienic behaviors can play an important role in the prevention of diseases related to water and sanitation. An average of 65% of death caused by diarrheal diseases could be reduced if good hygiene practice accompanies the provision of water and sanitation [2]. Diarrheal disease has been considered
Microfinance and Women Empowerment: A Panel Data Analysis Using Evidence from Rural Bangladesh
Sarahat Salma Chowdhury,Sifat Adiya Chowdhury
International Journal of Economics and Finance , 2011, DOI: 10.5539/ijef.v3n5p86
Abstract: Microfinance has long been associated with generating empowerment of women. Over 90% of their clients in Bangladesh are women. The rising demand for credit may seem to indicate the popularity of the program. However, analysing why demand for credit is rising among women may offer a way to analyse empowerment of women. Therefore, this paper utilises this fact and uses a panel data survey to measure individual level outcomes such as labour supply, asset accumulation and family planning and household level outcomes such as children education and household expenditure per annum from participating in a credit program. These outcomes would then be compared to outcomes that can be achieved from borrowing loans from a non-program source. By comparing these outcomes, the benefit of micro finance is extracted, which in turn, is further analysed in terms of whether they indicate empowerment of women.
Use of Constructivist Approach in Higher Education: An Instructors’ Observation  [PDF]
Irshad Hussain
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.32028
Abstract: The study aimed at exploring the significance of constructivist approach at higher education level. It also examined its effects on social learning of students. The researcher adopted observational method of descriptive research. The participants of the study consisted of students of Master of Arts in Education (M. A. Education) of the Islamia University of Bahawalpur. The researcher taught a course titled, “Qualitative research methods” for three years to three (different M. A. Education) classes. The researcher used constructivist approach and designed activities to involve students in the process of learning. The activities were offered to homogeneous (male-male and female-female) as well as heterogeneous (male-female) groups of students. On the basis of observation, the researcher concluded that students enjoyed working on collaborative and cooperative projects and tasks. They were keen on constructing knowledge by involving themselves in activities and showing their readiness to embrace constructivist approach. Constructivist approach played a significant role in the process of learning to constructing knowledge. Similarly, collaborative and cooperative work developed contribution spirit among students overcoming their shyness and introversion. They became independent and capable of taking initiatives in conducting research projects. They also learnt ethics, social skills and etiquettes in groups. However, some culture related problems like working of female students with their counterparts and shyness of rural students were noted.
Integrative therapy for personality disorders: Experiences in developing integrative approaches for treatment-refractory personality-disordered clients  [PDF]
Nazir Hussain
Health (Health) , 2013, DOI: 10.4236/health.2013.55112
Abstract:

Personality Disordered (herein referred to as PD) clients are challenging to statutory mental healthcare programmes. They can be difficult to diagnose: their disorders can be obscured by second-order problems such as anxiety and depression, caused by PD cognitive processes. Treatment-as-usual (the predominant model of psychiatric intervention) for PD clients in crisis tends to focus on these second-order presentations, but provide no means of identifying underlying PD. The purpose of this paper is to describe how heuristic methods of diagnosis can be used to reframe the client’s distress in the context of personality disorders (according to DSM-IV criteria), and how subsequent application of integrative therapies can break their cycle of recidivism. Method: Two case studies of treatment-refractory individuals with cyclical patterns of crisis-point service engagement for self-harm or psychotic depression where heuristic/ integrative therapies were used. Results: The use of integrative therapies in the case studies presented resulted in a marked change in recidivism and quality of life for each client, as measured by a significant reduction in presentation of symptoms and hypervigilance. Discussion: By understanding the maladaptive cognitive-behavioural processes of PD clients, they can be modified to reduce the client’s self-defeating behavioural patterns, breaking the cycle of recidivism. However, a new diagnostic strategy must first be formulated that looks at the clients past use of mental health services to detect underlying PD.

Development of SDS Modified Graphite Electrode for Effective Oxidation of Methanol and Ethanol  [PDF]
Tajamal Hussain
Open Journal of Applied Sciences (OJAppS) , 2016, DOI: 10.4236/ojapps.2016.613074
Abstract: Methanol and ethanol fuel cells are getting important day by day because of energy crises. Main concern for fuel cell is the efficiency of the metal catalyst used for oxidation of methanol and ethanol. In this work, surfactant reformed electrodes by introducing sodium dodecyl sulphate (SDS), surfactant, at the surface of graphite electrodes along the metal nanoparticles were tried to develop. Idea behind it is to enhance the catalytic activity of metal nanoparticles through SDS. Modification of the graphite electrodes by SDS was characterized using Fourier transform infrared (FTIR) spectroscopy. Afterwards through electrochemical deposition, iron nanoparticles were got deposited on SDS modified and unmodified graphite electrodes which acted as catalyst. SDS modified iron deposited electrodes were utilized for the oxidation of methanol and ethanol in basic media. It was expected that SDS deposited at the surface of the electrodes would play an effective role in enhancing the rate of the oxidation reaction just by creating interaction between catalyst and reactant. Similar oxidation reaction was studied using unmodified iron deposited graphite electrode. Comparison of the results of oxidation reactions encourages the use of surfactant to speed up the oxidation reaction.
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