1,030 research outputs found

    Capital account liberalization, financial development and industry growth: a synthetic view

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    This paper synthesizes previous studies analyzing the effects of capital account liberalization on industry growth while controlling for financial crises, domestic financial development and the strength of institutions. We find reasonably strong evidence that financial openness has positive effects on the growth of financially-dependent industries, although these growth-enhancing effects evaporate during financial crises. Further analysis indicates that the positive effects of capital account liberalization are limited to countries with relatively well-developed financial systems, good accounting standards, strong creditor rights and rule of law. It suggests that countries must reach a certain threshold in terms of institutional and economic development before they can expect to benefit from capital account liberalization.Capital account liberalization, Financial development, External dependence

    7Li NMR of Normal Human Erythrocytes

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    Lithium has been known to be an effective medication for people with bipolar disorder. The mechanisms of action of lithium in the brain is not very well understood. NMR spectroscopy and imaging are effective both in determining lithium levels in tissue and brain. We have monitored lithium levels in red blood cells. We have been able to separate intra- and extracellular compartments of lithium using shift reagents, thereby obtaining T^1 \u27s of both the compartments. Lithium uptake as a function of hematocrit was monitored weekly over a 3 week period. The time constant of 50 mM lithium uptake at 25°C and 85% hematocrit was found to be 16.5 hrs. The time constant of 1.8 mM lithium uptake at 37 °C and 45% hematocrit was found to be 11.6 hrs. Experiments on the visibility of the quadrupolar nuclei indicate that it is only 74-90% visible and the visibility decreased with decreasing concentrations

    Estimation of Thermal and Hydraulic Characteristics of Compact Brazed Plate Heat Exchangers

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    This thesis work presents various performance estimation methods of compact brazed plate heat exchangers (BPHE) operating in single phase, condenser, evaporator, cascaded and transcritical applications. Such methods play a vital role in development of heat exchanger selection software and during geometry parameter estimation in the new product development process. The suitability of employing commercial computational fluid dynamics (CFD) codes for estimating single phase thermal and hydraulic performance is investigated. Parametric studies are conducted on geometries of single phase fluid sections to isolate and quantify the influence of individual geometric parameters. The influence of mesh characteristics, choice of boundary conditions and turbulent flow modeling on the accuracy of the thermal and hydraulic predictions is presented. Benefits of simulation of fluid flow in entire channels and characteristics of channel flow for different geometric patterns are also presented. A computationally light, general, robust and continuous rating calculation method is developed for implementation in BPHE selection software. The pressure-enthalpy based method provides a generic rating core for various types of applications and provides extensive post processing information of the heat transfer process. General single phase thermal and hydraulic empirical correlations are developed as functions of plate geometric parameters. For facilitating better integration of the developed calculation method with other refrigeration system simulation software, first or higher order continuity is maintained in the sub-routines used for calculating local heat transfer coefficients and refrigerant properties. A new finite grid interpolation method is developed for fast and accurate retrieval of refrigerant properties. The developed method is currently implemented in SSPG7 (BPHE selection software of SWEP International AB) for supporting transcritical CO2 calculations and cascaded heat exchanger calculations. Additionally, the methods developed for single phase and two phase test data evaluation based on meta-heuristic optimization routines is also presented. The application and results of using the developed rating models for various types of calculations is summarized. Other topics such as influence of variable fluid properties on BPHE rating calculations, influence of multi-pass flow arrangement on lumped BPHE rating calculations are briefly presented

    A new hierarchical clustering algorithm to identify non-overlapping like-minded communities

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    A network has a non-overlapping community structure if the nodes of the network can be partitioned into disjoint sets such that each node in a set is densely connected to other nodes inside the set and sparsely connected to the nodes out- side it. There are many metrics to validate the efficacy of such a structure, such as clustering coefficient, betweenness, centrality, modularity and like-mindedness. Many methods have been proposed to optimize some of these metrics, but none of these works well on the recently introduced metric like-mindedness. To solve this problem, we propose a be- havioral property based algorithm to identify communities that optimize the like-mindedness metric and compare its performance on this metric with other behavioral data based methodologies as well as community detection methods that rely only on structural data. We execute these algorithms on real-life datasets of Filmtipset and Twitter and show that our algorithm performs better than the existing algorithms with respect to the like-mindedness metric

    Community engagement, environmental education, and public outreach in sustainable engineering : a collaborative demonstration project for water treatment using natural processes and sustainable materials.

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    Community engagement through environmental education for the public is an important component in the link between individual citizens, their community, and local government agencies responsible for maintaining urban recreation and park areas. Streams and waterways passing through urban areas are often misunderstood by the public in terms of whether the waterway is natural, constructed, or a combination of both. Additionally, aspects of water quality or water pollution are often obscure to the community and there are limited means to provide direct information to the public. In any case, the public are often drawn to interact with urban streams through recreation activities or through environmental education interest. It is with this concept in mind that this project was formulated and realized through collaboration between the Louisville Metro Government Metro-Council, the local water supply utility Louisville Water Company (LWC), the local stormwater and sewerage agency Metropolitan Sewer District (MSD), and the University of Louisville (UL), Kentucky Institute for the Environment and Sustainable Development (KIESD). Project collaborators include Louisville Metro-Councilwoman Tina Ward-Pugh; Mr. Greg Heitzman, LWC/MSD; Mr. Daren Thompson, MSD; and UL personnel: Mr. Daniel Carter, Dr. Deborah Yoder-Himes, Ms. Ellen Briscoe, Mr. Jake Robertson; and Mr. Russell A. Barnett and Dr. David Wicks, KIESD. The pilot water treatment plant consists of filters, which uses sunlight for disinfection and naturally available materials in filters. Disinfection of water by exposing it to sunlight is an age old concept. Historically containers with water were left in sunlight for hours to make it potable. Though it was a religious practice in those days. It started attracting researchers from early 80s to develop sustainable water disinfection concepts for under developed communities. Most of the research studies developed systems which involves both thermal and optical inactivation of bacteria. Researchers are working on increasing the robustness of the systems by adopting different reflective surfaces and shapes of the reflectors. Water depth, suspended solids in water are the major factors which impact the penetration of sunlight. Reduction of suspended solids can be achieved either by sedimentation or filtration. Filters comprised of naturally available material can make the system more sustainable and less expensive. This project tests the optical disinfection capacity of sunlight. For this an open channel flow of water was adopted. Four filters were installed to reduce the amount of suspended particles entering into the solar disinfection system (SODIS). This pilot study was conducted using polluted urban stream water at 4 different water flow rates. It is observed that reduction in flow rates resulted in increased disinfection rates. And filters also contributed in reducing the bacterial concentration. SODIS is successful in achieving the minimum 30-day average E. coli concentrations in water accessed for recreation

    Eye banking: an introduction

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    This article introduces the work of eye banks, institutions responsible for collecting (harvesting) and processing donor corneas, and for distributing them to trained corneal graft surgeons

    Simulation of electron transport in quantum well devices

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    Double barrier resonant tunneling diodes (DBRTD) have received much attention as possible terahertz devices. Despite impressive experimental results, the specifics of the device physics (i.e., how the electrons propagate through the structure) are only qualitatively understood. Therefore, better transport models are warranted if this technology is to mature. In this paper, the Lattice Wigner function is used to explain the important transport issues associated with DBRTD device behavior

    A study on prevalence of carotid artery stenosis in acute ischaemic stroke patients in Amalapuram, Andhra Pradesh, India

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    Background: Extra cranial carotid disease due to arteriosclerosis is usually associated with hypercholesterolemia and hyperlipidemia. Extra cranial carotid stenosis has been found to be less prevalent in black American and in Egyptians while intracranial disease is far more common Various methods includes transcranial doppler (TCD) ultrasonography, cerebral angiography, computed tomography angiography (CTA) and magnetic resonance angiography (MRA).Methods: All patients with ischaemic stroke of acute onset admitted in the medical wards of Konaseema institute of medical sciences between June 2018 and January 2019 were included in the study. All patients were subjected to CT scan brain study and colour Doppler study of extra cranial carotid arteries and vertebral arteries. Systolic and diastolic velocity of blood flow, carotid intimal medial thickness, presence of athermanous plaque and thrombus was looked for and then the percentage of stenosis of the affected arteries was calculated.Results: In the present study 0ut of 23 patients with carotid stenosis 9 patients had mild carotid stenosis, 8 patients had moderate stenosis and 6 patients had severe stenosis. Out of 23 patients with carotid stenosis the 11 patients have stenosis in the right carotid and 12 patients had stenosis in the left side. The site of stenosis is ICA in 17 patients and CCA in 6 patients.Conclusions: In present study every patient with carotid artery stenosis had one or the other risk factor for carotid atherosclerosis. In other words, there was no patient with carotid artery stenosis, without any risk factor in present study. Hence asymptomatic patients with these risk factors should be screened for carotid stenosis to prevent stroke
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