Shiv Nadar University

About: Shiv Nadar University is a education organization based out in Dadri, Uttar Pradesh, India. It is known for research contribution in the topics: Population & Graphene. The organization has 1015 authors who have published 1924 publications receiving 18420 citations.

Cobalt-Catalyzed, Hydroxyl-Assisted C–H Bond Functionalization: Access to Diversely Substituted Polycyclic Pyrans

Abstract: Highly efficient oxidative annulation of alkynes furnished diversely substituted pyran[2,3,4-de]chromene-2-one derivatives and related polycycles in moderate to high yield. The reaction is catalyze...

Numerical and Experimental Study on Performance Enhancement of Darrieus Vertical Axis Wind Turbine With Wingtip Devices

Abstract: Darrieus type vertical axis wind turbines (VAWT) are being used commercially nowadays; however, they still need to improve in terms of performance as they work in an urban environment where the wind speeds are low and the gusts are frequent. The aerodynamic performance of Darrieus turbine is highly affected by the wingtip vortices. This paper attempts at analyzing and comparing the performance of Darrieus with the use of various wingtip devices. Attempts have also been made to find out optimal working parameters by studying the flow through turbines with different tip speed ratios and different inlet wind speeds. A comparative computational fluid dynamics (CFD) simulation was performed on a small-scale, straight-bladed Darrieus rotor vertical axis wind turbine, with a large stationary domain and a small rotating subdomain using sliding mesh technique. Comparison of the performance of end tip device that can be used against a baseline rotor configuration is done, with the aim of identifying the best tip architecture. The main focus lies on building an experimental setup to validate the results obtained with the CFD simulation and to compare the performance with and without wingtip device. VAWTs with wingtip device show very promising results compared to the baseline model.

Access to Higher Education in India: An Exploration of Its Antecedents *

Abstract: Deficits in participation of marginalized groups in Higher Education (HE) have attracted significant policy and research attention. Recent studies have explored the role of socioreligious affiliation and other factors in determining participation in HE. It is also shown that appropriate measures of ‘deficits’ in participation should inform the nature and scope of affirmative action for marginalized groups. Using appropriate measures of participation, this paper explores if the role of socio-religious background and other factors has changed over a period of time. This dynamics of participation in HE is analyzed by using three rounds of NSS data for the period 1999-2010.

Fiscal health of selected Indian cities

Abstract: This paper provides an overview of the fiscal problems faced by five urban agglomerations in India, namely, Delhi, Hyderabad, Kolkata, Chennai, and Pune. It analyzes the fiscal health of the five urban agglomerations, quantifies their revenue capacities and expenditure needs, and draws policy recommendations on the means to reduce the gaps between revenue raising capacities and expenditure needs. The main findings suggest that, except for five small urban local bodies in Hyderabad, the others are not in a position to cover their expenditure needs by their present revenue collections. All the urban agglomerations have unutilized potential for revenue generation; however, with the exception of Hyderabad, they would fail to cover their expenditure needs even if they realized their revenue potential. Except in Chennai, larger corporations are more constrained than smaller urban local bodies. The paper recommends better utilization of"own revenue"through improved administration of property taxes, implementation of other taxes, and collection of user charges. It recommends that state governments should explore the option of allowing local bodies to piggyback a small proportion on their value-added tax collections. Another way to reduce the fiscal gap would be to earmark a portion of the sales proceeds from land and housing by state governments sold through their development agencies for improvements in urban infrastructure. The paper also recommends that the State Finance Commissions should develop appropriate norms for estimating expenditure needs, based on which transfers from the state to local governments can be decided.

Structural landscape of multicomponent solids based on sulfa drugs

Abstract: Our attempts to cocrystallize three sulfa drugs (SDs), viz., sulfamerazine (smr), sulfamethazine (smz) and sulfamethoxazole (smx) with four coformers, viz., niflumic acid and flufenamic acid, 4-aminopyridine and piperazine led to eight new solids. Although the molecular structures of smr, smx and smz are comparable, their propensities to form multiple solid forms with the four selected coformers were found to be different. smr and smx reacted with 4-aminopyridine and piperazine yielding four salts while its reaction with niflumic and flufenamic acids resulted in the precipitation of only the reactants. In contrast, smz formed cocrystals with niflumic and flufenamic acids and salts with 4-aminopyridine and piperazine. To understand this discrepancy, we investigated the structural chemistry of these solids by analysing the interactions of key synthons present in the single component SDs as well as those reported in the literature. The study reveals that recognition of the nature of key synthons occurring in single component SDs and the ability to break and form new synthons with coformers can be a viable strategy to design multicomponent solids based on sulfa drugs.