Far-infrared study of K giants in the solar neighborhood: Connection between Li enrichment and mass-loss

We searched for a correlation between the two anomalous properties of K giants: Li enhancement and IR excess from an unbiased survey of a large sample of RGB stars. A sample of 2000 low-mass K giants with accurate astrometry from the Hipparcos catalog was chosen for which Li abundances have been determined from low-resolution spectra. Far-infrared data were collected from the $WISE$ and $IRAS$ catalogs. To probe the correlation between the two anomalies, we supplemented 15 Li-rich K giants discovered from this sample with 25 known Li-rich K giants from other studies. Dust shell evolutionary models and spectral energy distributions were constructed using the code DUSTY to estimate different dust shell properties, such as dust evolutionary time scales, dust temperatures, and mass-loss rates. Among 2000 K giants, we found about two dozen K giants with detectable far-IR excess, and surprisingly, none of them are Li-rich. Similarly, the 15 new Li-rich K giants that were identified from the same sample show no evidence of IR excess. Of the total 40 Li-rich K giants, only 7 show IR excess. Important is that K giants with Li enhancement and/or IR excess begin to appear only at the bump on the RGB. Results show that K giants with IR excess are very rare, similar to K giants with Li enhancement. This may be due to the rapid differential evolution of dust shell and Li depletion compared to RGB evolutionary time scales. We also infer from the results that during the bump evolution, giants probably undergo some internal changes, which are perhaps the cause of mass-loss and Li-enhancement events. However, the available observational results do not ascertain that these properties are correlated. That a few Li-rich giants have IR excess seems to be pure coincidence.Comment: Accepted for Publication in Astronomy & Astrophysics, 6 figures, 5 tables, 19 page

The Stability of Non Newtonian Fluid Between the Two Rotating Porous Cylinders (Wide Gap Case)

This paper is primarily concerned with the stability of the non Newtonian fluid between two porous cylinders in the case of wide gap. The problem is discussed for Mhu>0,Mhu=0 and Mhu,0. The results show that the Taylor number depends on the gap size in the case of non Newtonian fluids and the presence of suction stabilizes the flow whereas the injection destabilizes the flow. Its is found the stability of the fluid decreases when the gap increases. The non Newtonian fluid is less stable when compared to the Newtonian fluid in the case of wide gap. It is also found in the case of wide gap(for non Newtonian fluid and the cylinders are counter rotating equally) the application of injection at the outer cylinder disturbs the radial velocity will not effect any appreciable change or disturbance in the vortex cell pattern at the onset of instability

Precipitation of Manganese Ammonium Phosphate from Homogeneous Solution by Urea Hydrolysis

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Regulation of Financial Sector in Developing Countries: Lessons From the 2008 Financial Crisis

This chapter aims to draw some practical lessons and raises some issues from the 2008 financial crisis for regulation of financial sectors in developing countries. At the time of writing, the crisis is far from over and the aftermath is still unclear. The chapter is divided into five sections. The first section gives an overview of considerations that are important in drawing lessons from the crisis, especially from the point of view of developing economies. The second section addresses the major issues of scope for, and limits to, counter-cyclicality in regulation, in view of the widely perceived need for such an approach to avoid similar crisis in the future. The third section addresses an issue, which has been in focus since late 2008—the idea of comprehensiveness in the regulatory scope of the financial sector. The fourth section explores possible improvements in regulatory structures that are provoked by the recent crisis. The concluding section lists several broader issues that need to be kept in view while considering improvements in regulation of financial sectors for the future

Stability of a Non Newtonian Fluid Between Two Concentric Rotating Porous Cylinders

The stability of non-Newtonian fluid confined between two concentric rotating porous cylinders has been examined. The critical determines the on set of instability has been determined as a function of 'a' (wave length) and S (cross viscous parameter). The variation of the critical Taylor number with S, suction parameter lambda and radial velocity distribution have been shown. It has been found that the effect of suction at the outer cylinder is to stabilize the flow whereas the injection destabilizes the flow. The presence of suction or injection does not affect radial velocity curves or vortex cells

Preparation and Characterization of NiO Thin Films by DC Reactive Magnetron Sputtering

Nickel oxide (NiO) thin films were successfully deposited on Corning 7059 glass substrates at different oxygen partial pressures in the range of 1 × 10 – 4 to 9 × 10 – 4 mbar using dc reactive magnetron sputtering technique. Structural properties of NiO films showed polycrystalline nature with cubic structure along (220) orientation. The optical transmittance and band gap values of the films increased with increasing the oxygen partial pressure from 1 × 10 – 4 to 5 × 10 – 4 mbar and decreased on further increasing the oxygen partial pressure. Using Scanning Electron Microscopy (SEM), fine grains were observed at oxygen partial pressure of 5 × 10 – 4 mbar. The film resistivity decreases from 90.48 to 13.24 Ω cm with increase in oxygen partial pressure to 5 × 10 – 4 mbar and then increased on further increasing the oxygen partial pressure. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3025

The impact of workplace design on training transfer as determined by the heuristic elicitation methodology

The design of the workplace often has been unexamined as a contributor to training transfer although practitioners have been reporting complaints by trainees about the difficulties of transferring their skills that refer specifically to workplace design. Research has been lacking that supports the association between the physical design of the workplace specifically as a contributor to training transfer. Therefore, the purpose of the present study was to examine the impact that workplace design has on training transfer within the context of particular work practices. The objectives of the study were 1) to identify design features that facilitate and impede training transfer, 2) to identify the significance of workplace design as an issue that organizations must consider in order to achieve successful training transfer, and 3) to introduce the Heuristic Elicitation Methodology (HEM) as a strategy for examining organizational issues impacting training transfer. Twenty-four office workers from the same large university who completed one of three supervisory training courses within a span of four months participated in the study. The methodology used to interview the 24 office workers was the Heuristic Elicitation Methodology (HEM). The methodology gives equal attention to both qualitative and quantitative methods and can easily be incorporated to accommodate the needs of social science research (Kupritz, 1996). For this study, the purpose of the methodology was to obtain information about organizational issues, including items and attributes, which facilitate and impede training transfer. Each interview was open-ended in which a sequence of interlinked questions developed from the respondent\u27s own language. The answers were recorded verbatim to retain accurate perceptions of the work environment and to identify the various organizational factors that have impacted training transfer. Supportive workplace design was the organizational issue that received the second highest cumulative response frequency for facilitating training transfer that followed positive management support. Unsupportive workplace design was the organizational issue that had the highest cumulative response frequency in impeding training transfer. Although positive management support received the highest cumulative response frequency in facilitating training transfer, lack of positive management support received the lowest cumulative response frequency in impeding training transfer. Although workplace design did not receive the highest cumulative response frequency of the top four organizational issues that surfaced in facilitating training transfer, it nevertheless did not lose in its credibility as an organizational factor with impact on training transfer. The study also revealed that workplace design had the highest response frequencies for items and attributes among all organizational issues in facilitating and impeding training transfer. Workplace design was concluded as a crucial factor to impact training transfer for particular work practices

Flow of a Dusty Viscous Liquid Through Rectangular Channel

The Laminar flow of an unsteady liquid with uniform distribution of dust particles through a rectangular channel under the influence of exponential pressure gradient with respect to time has been investigated. The influence of the presence of the dust particles on fluid particles is discussed and graphs of velocity profile are drawn