FLOW PAST AN ACCELERATED HORIZONTAL CYLINDER IN A ROTATING FLUID

An analysis is presented to  study the laminar flow of a viscous incompressible fluid past an accelerated horizontal cylinder in a rotating fluid. The exact solutions of the dimensionless governing partial differential equations are obtained by Laplace transform technique. Axial and transverse components of velocity profile, skin friction are derived and effects of rotation parameter and time on these components are presented in graphs. As a departure from the analysis concerning to the horizontal accelerated plate in a rotating fluid, the present analysis shows no inertial oscillation, whatever may be the time small or large

The Off-Label Use of Hydroxychloroquine in Prophylaxis and Treatment of COVID-19

Coronavirus pandemic has covered the entire globe only in a few months and has been declared as a public health emergency due to a very high morbidity as well as mortality rate.  Till date no curative measure is available for this fatal disease and only social distancing has been of some help in prevention. However, anti-malarial drug hydroxychloroquine is being tried for prophylaxis and treatment at early stages of the disease although it is not an approved indication for this drug which has given some hope to health care professionals and the affected population

Reputation and Competence in Publicly Funded Science: Estimating the Effects on Research Group Productivity..

This paper estimates the "production function" for scientific research publications in the field of biotechnology. It utilizes an exceptionally rich and comprehensive data set pertaining to the universe of research groups that applied to a 1989-1993 research program in biotechnology and bio-instrumentation, sponsored by the Italian National research Council, CNR. A structural model of the resource allocation process in scientific research guides the selection of instruments in the econometric analysis, and controls for selectivity bias effects on estimates based on the performance of funded research units. The average elasticity of research output with respect to the research budget is estimated to be 0.6; but, for a small fraction of groups led by highly prestigious PIs this elasticity approaches 1. These estimates imply, conditional on the distribution of observed productivity, that a more unequal distribution of research funds would increase research output in the short-run. Past research publication performance is found to have an important effect on expect levels of grant funding, and hence on the unit's current productivity in terms of (quality adjusted) publications. The results show that the productivity of aggregate resource expenditures supporting scientific research is critically dependent on the institutional mechanisms and criteria employed in the allocation of such resources.

Sturdier DNA nanotubes via ligation

DNA nanotubes are crystalline self-assemblies of DNA tiles ~10 nm in diameter that readily grow tens of micrometers in length. Easy assembly, programmability, and stiffness make them interesting for many applications, but DNA nanotubes begin to melt at temperatures below 40 °C, break open when deposited on mica or scanned by AFM, and disintegrate in deionized water. These weaknesses can be traced to the presence of discontinuities in the phosphate backbone, called nicks. The nanotubes studied here have five nicks, one in the core of a tile and one at each corner. We report the successful ligation of all four corner nicks by T4 DNA ligase. Although ligation does not change the nanotubes’ stiffness, ligated nanotubes withstand temperatures over 70 °C, resist breaking during AFM, and are stable in pure water for over a month. Ligated DNA nanotubes are thus physically and chemically sturdy enough to withstand the manipulations necessary for many technological applications

Effect of global warming on monsoon:With reference to Chhattisgarh State

Global warming is increasing the average temperatures of the earth. A rise in earth’s temperatures can in turn root to other alternation of ecology including sea level and modifying the quantities and patterns of rain fall. This modification may boost the occurrence and concentration of severe climate events such as floods famines, heat waves tornados and twisters. Scientists all over the world are making prediction about the ill effect of global warming and connecting some of the events that have taken place in the Past few decades as an alarm of global warming. The Intergovernmental panel on climate change (IPCC) conclusion that increasing greenhouse gases concentration resulting from human activities such as fossils fuel burning and deforestation are responsible for most of the observed temperature increase since the middle of 20th century. As of June 2012, only the United State historically the world’s largest emitter of green house gases which is main cause of global warming has refused to rectify the KYOTO protocol treaty. In Chhattisgarh state gradual decrease in rain fall has been seen since last 50 years due to global warming. During the last 5 decades the average rainfall in Chhattisgarh state has fallen down from 1301 millimeter to 1150 millimeter .In Chhattisgarh state the arrival of monsoon every year has been noted the 2nd week of June and this year monsoon arrived on 5th June, 2012, this monsoon word is derived from Arabic word mousim. Recently the scientists have prepared a Visual ALTAS to know where the rain falls have occurred. This visual atlas has been prepared by international team led by National University of Australia

Transient natural convection magnetohydrodynamic motion over an exponentially accelerated vertical porous plate with heat source

Effects of heat source on the magnetohydrodynamic (MHD) one-dimensional flow past a vertical surface have been analyzed. Thermal radiation effect is present. The Laplace transformation procedure reduces the involved governing PDEs into the ODEs and hence closed form solutions have been obtained. The effect of permeability parameter (k), heat source parameter (Q), thermal radiation (R), suction parameter (γ), magnetic field parameter (M) have been analyzed on the velocity and temperature distributions, Skin friction coefficient (τ) and Nusselt number (Nu). The convergence of the obtained solutions has been seen through graphical results. Effects of skin friction (τ) and the Nusselt number (Nu) for different parameters have also been analyzed

Design and characterization of programmable DNA nanotubes

DNA self-assembly provides a programmable bottom-up approach for the synthesis of complex structures from nanoscale components. Although nanotubes are a fundamental form encountered in tile-based DNA self-assembly, the factors governing tube structure remain poorly understood. Here we report and characterize a new type of nanotube made from DNA double-crossover molecules (DAE-E tiles). Unmodified tubes range from 7 to 20 nm in diameter (4 to 10 tiles in circumference), grow as long as 50 μm with a persistence length of ~4 μm, and can be programmed to display a variety of patterns. A survey of modifications (1) confirms the importance of sticky-end stacking, (2) confirms the identity of the inside and outside faces of the tubes, and (3) identifies features of the tiles that profoundly affect the size and morphology of the tubes. Supported by these results, nanotube structure is explained by a simple model based on the geometry and energetics of B-form DNA