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Resveratrol and its biological actions
Shah Praharsh,Patel Jagruti
International Journal of Green Pharmacy , 2010,
Abstract: Resveratrol is a phytoalexin that is found in a few edible food materials such as grape skins, pea-nuts and red wine. Numerous reports exists in the literature suggesting that dietary resveratrol may act as an antioxidant, promotes nitric oxide production, inhibits platelet aggregation and increases high-density lipoprotein cholesterol, and subsequently may serve as a cardio-protective agent. Recent reports demonstrated that resveratrol can function as a cancer chemopreventive agent, exhibiting anti-inflammatory, neuroprotective, anti-ageing and antiviral properties. However, most of these effects are yet to be confirmed in humans. In the only clinical trial, high doses of special proprietary formulation has demonstrated blood sugar-lowering effects of resveratrol in type 2 diabetes mellitus. As with many polyphenols, resveratrol is reasonably well absorbed but has low bioavailability. It is metabolized by hydroxylation, glucuronidation, sulfation and hydrogenation. We reviewed the published literature and reports to consolidate information available on the biological activity of resveratrol using electronic databases as well as handpicked articles to summarize the biological effects of resveratrol and its clinical benefits against human diseases.
Numerical Simulation of Two-Dimensional Dendritic Growth Using Phase-Field Model  [PDF]
Abdullah Shah, Ali Haider, Said Karim Shah
World Journal of Mechanics (WJM) , 2014, DOI: 10.4236/wjm.2014.45015
Abstract:

In this article, we study the phase-field model of solidification for numerical simulation of dendritic crystal growth that occurs during the casting of metals and alloys. Phase-field model of solidification describes the physics of dendritic growth in any material during the process of under cooling. The numerical procedure in this work is based on finite difference scheme for space and the 4th-order Runge-Kutta method for time discretization. The effect of each physical parameter on the shape and growth of dendritic crystal is studied and visualized in detail.

Urban Green Spaces and an Integrative Approach to Sustainable Environment  [PDF]
Shah Md. Atiqul Haq
Journal of Environmental Protection (JEP) , 2011, DOI: 10.4236/jep.2011.25069
Abstract: This paper explains the benefits and challenges of urban green spaces based on the critical discussion of study results from different studies in different cities. The important roles played by green spaces are social, economic, cultural and environmental aspects of sustainable development. Urban green spaces can be a comprehensive tool for long term protection of environmental sustainability through improving the quality of life and air quality, increasing property value due to their amenity and aesthetic characteristics, and reducing the energy costs of cooling buildings. Urban green spaces also can provide ecosystem services in which the recreation and relaxation facilities are especially available to urban dwellers and tourists too. To confirm the multiple roles played by green spaces, certain level of qualitative improvements and distribution of green spaces within the urban area should be considered and incorporated effectively into the environmental sustainability agenda. To do this, an integrated approach regarding the planning, monitoring, designing and maintaining of urban green spaces is required for improving the environmental sustainability in cities in different countries.
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.
A Survey of High Performance Concrete Developments in Civil Engineering Field  [PDF]
Vatsal Patel, Niraj Shah
Open Journal of Civil Engineering (OJCE) , 2013, DOI: 10.4236/ojce.2013.32007
Abstract:

High Performance concrete (HPC) has received increased attention in the development of infrastructure Viz., Buildings, Industrial Structures, Hydraulic Structures, Bridges and Highways etc. leading to utilization of large quantity of concrete. This paper presents a comprehensive coverage of High Performance concrete developments in civil engineering field. It highlights the High Performance concrete features and requirements over conventional concrete. Furthermore, recent trends with regard to High Performance Concrete development in this area are explored. This paper also includes effect of Mineral and Chemical Admixtures used to improve performance of concrete.

Stochastic Logistic Model for Fish Growth  [PDF]
Md. Asaduzzaman Shah
Open Journal of Statistics (OJS) , 2014, DOI: 10.4236/ojs.2014.41002
Abstract:

Two extensions of stochastic logistic model for fish growth have been examined. The basic features of a logistic growth rate are deeply influenced by the carrying capacity of the system and the changes are periodical with time. Introduction of a new parameter \"\", enlarges the scope of investing the growth\"\"of different fish species. For rapid growth lying between 1 and 2 and for slowly growing\"\".

Role of Videonystagmography (VNG) in Epley’s Maneuver  [PDF]
Saloni Shah, Rajesh Vishwakarma
International Journal of Otolaryngology and Head & Neck Surgery (IJOHNS) , 2014, DOI: 10.4236/ijohns.2014.36056
Abstract: Aims and Objectives: To study benefit of videonystagmography in confirmation of canalolith repositioning in patients with Benign Paroxysmal Positional Vertigo after Epley’s manouver. Study Design: Prospective study of 35 cases of BPPV. Materials and Method: 35 patients of BPPV presenting at vertigo clinic of ENT department at Civil Hospital Ahmedabad were treated with canalolith repositioning procedure and improvement in nystagmus was studied and confirmed by VNG. Observation: 31 patients out of 35 patients were improved with 1st CRP, 2 out of 3 patients improved with 2nd CRP and 1 patient improved with 3rd CRP. This improvement is confirmed using VNG. Conclusion: Videonystagmography is a very useful tool for ensuring the otolith repositioning by the canalith repositioning manouver. It is a confirmatory adjunct to visual analysis.
A Solution of the Burger’s Equation Arising in the Longitudinal Dispersion Phenomenon in Fluid Flow through Porous Media by Mixture of New Integral Transform and Homotopy Perturbation Method  [PDF]
Kunjan Shah, Twinkle Singh
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.34004
Abstract: The main aim of the paper is to examine the concentration of the longitudinal dispersion phenomenon arising in fluid flow through porous media. These phenomenon yields a partial differential equation namely Burger’s equation, which is solved by mixture of the new integral transform and the homotopy perturbation method under suitable conditions and the standard assumption. This method provides an analytical approximation in a rapidly convergent sequence with in exclusive manner computed terms. Its rapid convergence shows that the method is trustworthy and introduces a significant improvement in solving nonlinear partial differential equations over existing methods. It is concluded that the behaviour of concentration in longitudinal dispersion phenomenon is decreases as distance x is increasing with fixed time t > 0 and slightly increases with time t.
The Mixture of New Integral Transform and Homotopy Perturbation Method for Solving Discontinued Problems Arising in Nanotechnology  [PDF]
Kunjan Shah, Twinkle Singh
Open Journal of Applied Sciences (OJAppS) , 2015, DOI: 10.4236/ojapps.2015.511068
Abstract: In this paper, a reliable algorithm based on mixture of new integral transform and homotopy perturbation method is proposed to solve a nonlinear differential-difference equation arising in nanotechnology. Continuum hypothesis on nanoscales is invalid, and a differential-difference model is considered as an alternative approach to describing discontinued problems. The technique finds the solution without any discretization or restrictive assumptions and avoids the round-off errors. Comparison of the approximate solution with the exact one reveals that the method is very effective. It provides more realistic series solutions that converge very rapidly for nonlinear real physical problems.
Women, Educational Leadership and Societal Culture
Saeeda Shah,Umbreen Shah
Education Sciences , 2012, DOI: 10.3390/educ2010033
Abstract: This paper argues that women’s participation in the public and their access to senior leadership positions is defined by cultural and belief systems in a society. It draws upon a study of Women College heads of women-only colleges, in a region in Pakistan, to unveil the discursive dynamics in that societal context where complex factors interact to determine what is acceptable in that culture. This has implications for women’ roles and determines their practices as college heads. The study also unveiled the culturally-informed strategies adopted by these women professionals to exercise their role as college heads in the presence of multiple cultural constraints.
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