565 research outputs found
Multi-Channel Implantable Cubic Rectenna MIMO System With CP Diversity in Orthogonal Space for Enhanced Wireless Power Transfer in Biotelemetry
No full textFor wireless power transfer (WPT), an implantable cubic rectenna multi-input-multi-output (MIMO) system (CRMS), operating in dual industrial, scientific, and medical (ISM) frequency bands of 2.45 and 5.8 GHz, is presented as a receiver ( Rx ). CRMS is evolved to the proposed biocompatible full-package cubic rectenna (FPCR) by including the power and data management circuit modules. The dual frequency bands differentiated by orthogonal circular polarization (CP) in a spatial quadrature would serve as propagation channels for power, data, and control signals. Four dual-branch rectifiers are designed using both distributed and lumped elements on the backside of individual antenna elements. To demonstrate the feasibility of the proposed work as an integrated system for WPT, the structures are fabricated individually, where the transmitter ( Tx ), which is an external antenna, and rectifiers are tested in free space and FPCR in a custom-made canonical phantom. After validation of individual measurements, power delivery from the Tx to the FPCR is conducted experimentally to measure the integrated system’s radiofrequency (RF)-dc total conversion efficiency (TCE). The FPCR is designed to receive low RF power ( PRF ) of 0 dBm, where a single cubic rectenna element (CRE) provides dc power ( PDC ) of 0.26 and 0.33 mW at 2.45 and 5.8 GHz, respectively. Thereafter, the interconnection of CREs in a series/parallel configuration improved PDC to 0.5/1.39 and 0.51/1.64 mW, respectively. Additionally, human safety is considered by evaluating a maximum permissible exposure (MPE) limit and specific absorption rate (SAR) distribution in a canonical tissue model when both Tx and FPCR are excited with 1 W power
Securitization and mortgage default
No full textThe academic literature, the popular press, and policymakers have all debated securitization's contribution to the poor performance of mortgages originated in the run-up to the recent crisis. Theoretical arguments have been advanced on both sides, but the lack of suitable data has made it difficult to assess them empirically. The author examines this issue by using a loan-level data set from LPS Analytics, covering approximately two-thirds of the mortgages originated in 2005 and 2006, and including both securitized and nonsecuritized loans. ; The author finds evidence that privately securitized loans do indeed perform worse than observably similar, nonsecuritized loans. Moreover, this effect is strongest in prime mortgage markets, which have not been studied in the previous literature. For example, a typical prime loan becomes delinquent at a 20 percent higher rate if it is privately securitized, ceteris paribus. This is consistent with the existence of adverse selection; that is, that lenders used information not available to investors to securitize loans that were riskier than they otherwise appeared. By contrast, for subprime mortgages, the impact of private securitization is concentrated in low or no-documentation loans; this latter result is consistent with previous work such as Keys et al. (2009).Mortgage-backed securities ; Default (Finance)
Design considerations for engineering AUVs
No full textThesis (S.M.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and the Woods Hole Oceanographic Institution), 2007.Includes bibliographical references (p. 85-89).Autonomous Underwater Vehicles (AUVs) have been established as a viable tool for Oceanographic Sciences. Being untethered and independent, AUVs fill the gap in Ocean Exploration left by the existing manned submersible and remotely operated vehicles (ROV) technology. AUVs are attractive as cheaper and efficient alternatives to the older technologies and are breaking new ground in many applications. Designing an autonomous vehicle to work in the harsh environment of the deep ocean comes with its set of challenges. This paper discusses how the current engineering technologies can be adapted to the design of AUVs. Recently, as the AUV technology has matured, we see AUVs being used in a variety of applications ranging from sub-surface sensing to sea-floor mapping. The design of the AUV, with its tight constraints, is very sensitive to the target application. Keeping this in mind, the goal of this thesis is to understand how some of the major issues affect the design of the AUV. This paper also addresses the mechanical and materials issues, power system design, computer architecture, navigation and communication systems, sensor considerations and long term docking aspects that affect AUV design. With time, as the engineering sciences progress, the AUV design will have to change in order to optimize its performance. Thus, the fundamental issues discussed in this paper can assist in meeting the challenge of maintaining AUV design on par with modern technology.by Vikrant P. Shah.S.M
Role of Risk Stratification and Genetics in Sudden Cardiac Death
No full textSudden cardiac death (SCD) is a major public health issue due to its increasing incidence in the general population and the difficulty in identifying high-risk individuals. Nearly 300,000-350,000 patients in the United States and 4- to 5 million patients in the world die from SCD. Coronary artery disease and advanced heart failure are the main etiology for SCD. Ischemia of any cause precipitates lethal arrhythmias, and ventricular tachycardia and ventricular fibrillation are the most common lethal arrhythmias precipitating SCD. Pulse-less electrical activity, brady-arrhythmia and electromechanical dissociation also result in SCD. Most sudden cardiac deaths occur out-of-the-hospital setting, so it is difficult to estimate the public burden, which results in overestimating the incidence of SCD. The insufficiency and limited predictive value of various indicators and criteria for SCD result in the increasing incidences. As a result, there is a need to develop better risk stratification criteria and find modifiable variables to decrease the incidence. Primary and secondary prevention and treatment of SCD need further research. This critical review is focused on the etiology, risk factors, prognostic factors and importance of risk stratification of SCD.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
Study of Plants Community and Their Economic Importance Present in the Vikrant University Gwalior Campus, Madhya Pradesh, India
No full textPlanning for biodiversity in urban areas is an important step in preventing biodiversity loss due to urbanization and deforestation. It is possible to design landscapes with a variety of plants, including trees, medicinal plants, and ornamental plants, that not only provide a healthy, pollution-free environment but also a variety of ecosystem services, including medicinal value, a source of food and fruit, aesthetic value, and educational services. The current study, which covers the identification, characterization, and studies of their relevance of plants on the campus of Vikrant University Gwalior, Madhya Pradesh, is based on a survey of plants in different zones of University. The different plant species were named, and their significance was researched. The total number of different plant species was 48. The study also identified five Monocotyledon plant species, which are members of the Arecaceae, Poaceae, Cycadaceae and Liliaceae families, while the remaining 43 different plants belong to Dicotyledon species. In order for readers to appreciate the wholesome environment produced by the various varieties of plants growing in the university campus, it also helps them comprehend the role that plants play in providing ecosystem services to people. The purpose of the study, which focused on flora, was to motivate the student body to preserve the university\u27s biodiversity
Sodium stibogluconate-associated acute interstitial nephritis in a patient treated for visceral leishmaniasis
No full textThe spectrum of side-effects of sodium stibogluconate is well described. Patients treated with sodium stibogluconate can develop varied manifestations of renal toxicity, ranging from renal cell casts, proteinuria, renal tubular acidosis and acute tubular necrosis, resulting in acute kidney injury (AKI). We describe a 32-year-old male patient who was treated for visceral leishmaniasis with sodium stibogluconate. The patient was readmitted two weeks after completion of the treatment for evaluation of AKI. Kidney biopsy revealed marked acute interstitial nephritis. The renal dysfunction reversed totally after a course of corticosteroids. Antimonials should be recognized as a new class of agents as a possible cause of drug-induced acute interstitial nephritis
Epidemiology and outcome of acute kidney injury from a tertiary care hospital in India
No full textWe aimed to study the epidemiology and outcome of acute kidney injury (AKI). This is a prospective study of adults aged 18 years or above diagnosed with AKI over a period of 16 months at a tertiary care hospital. Three hundred and nine patients had AKI. The observed incidence of AKI was eight per 1000 admissions. About 92.2% had community-acquired AKI (CA-AKI), and in 7.8% it was hospital-acquired AKI (HA-AKI). Etiological factors for AKI were medical in 87.4% of the cases, surgical in 9.4%, and obstetric 3.2%. Sepsis was the most common (53.1%) etiology of AKI among the medical cases. Among sepsis, scrub typhus, urosepsis, and pneumonia were the most common causes of AKI. Hypovolemia (9.4%), biological toxins (8.4%), nephrotoxic drugs and chemicals (7.4%), cardiac causes (7.4%), and acute glomerulonephritis (1.9%) were other medical causes of AKI. Nearly 38.2% had multiorgan failure, 20.1% required vasopressors, 6.1 % required Intensive Care Unit support, and 23.3% required dialysis. Mortality was 8.7%. Anemia, use of vasopressor drugs, and need for intensive care support were independent predictive factors for mortality. AKI is common in hospitalized adults in India and leads to significant in-hospital mortality. AKI is largely a CA-AKI and the lesser percentage is due to HA-AKI. Many causes are potentially preventable. Early fluid resuscitation, effective anti-infective treatment, appropriate antidotes, and timely referral of established AKI patients to centers with dialysis facilities can improve AKI outcomes
Credit Ratings and Bank Monitoring Ability
No full textIn this paper we use credit rating data from two Swedish banks to elicit evidence on these banks’ loan monitoring ability. We do so by comparing the ability of bank ratings to predict loan defaults relative to that of public ratings from the Swedish credit bureau. We test the banks’ abilility to forecast the credit bureau’s ratings and vice versa. We show that one of the banks has a superior predictive ability relative to the credit bureau. This is evidence that bank credit ratings do contain valuable private information and suggests they may be be a reasonable basis for risk management. However, public ratings are also found to have predictive ability for future bank ratings, indicating that risk analysis should be based on both public and bank ratings. The methods we use represent a new basket of straightforward techniques that enable both financial institutions and regulators to assess the performance of credit ratings systems.Monitoring;banks;credit bureau;private information;ratings;regulation;supervision
Performance of Broad Bean (Vicia faba L.) Genotypes for Pod Yield and Yield Contributing Morpho-physiological Components under Mid Hill Conditions of North Western Himalayas
No full textAims: The present investigation was planned to evaluate thirty five broad bean genotypes along with one check Vikrant-B for yield and some yield contributing morpho-physiological components.
Study Design: Randomized Block Design.
Place and Duration of Study: The experiment was undertaken at Experimental farm of the Department of Vegetable and Floriculture CSK HPKV, Palampur situated at 32° 6\u27 N latitude and 76° 3\u27 E longitude at an elevation of 1290.8 m amsl during 2015-16.
Methodology: The experimental material constituted thirty five genotypes along with one check collected from different parts of country. Observations were recorded on ten randomly selected plants in each replication on days to 50% flowering, node at which 1st flower appears , branches per plant, nodes per plant, plant height (cm), days to maturity, pod length (cm), pods per plant, pod yield per plant (g), pods per node, seeds per pod, seed yield per plant (g), seed size (cm), 100-seed weight, harvest index (%), total soluble solids (oBrix), dry matter (%), ascorbic acid (mg/100 g) and protein content (%). The analysis was carried out using OPSTAT Software following the method suggested by Singh and Chaudhary (1977).
Results: The analysis of variance revealed that mean squares due to genotypes were significant for all the traits. On the basis of mean performance, ‘Local-1-C’ was the top ranking genotype for pod yield per plant which significantly outperformed all the genotypes with an increase of 30.83 per cent over check ‘Vikrant-B’. Further, genotypes viz., HB-123-B and HB-123-C showed superiority for both pod yield and seed yield per plant over check and other genotypes.
Conclusion: The best performing genotypes could be used for further evaluation under different environments to be released as a variety (s) or under hybridization programmes for Broad bean improvement.
 
Investigation of the relationship between geomorphological indices and sensitivity analysis of hypsometry and its property to polynomial order in the Nahan salient
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