Energy: An Exploratory Study on the Experience of Developing Countries in the Context of Development and the State of the Environment

  Energy is required for development because it facilitates production and makes day to day activity less cumbersome. The industrial revolution and the progress after that would not have been possible without increased energy use. Issues related to energy use in developing countries are complicated. These countries use energy derived mostly from non-renewable sources such as petroleum, coal and inefficient fuels like firewood, and biomass. Thus, energy use leads to environmental pollution. Hence, policy measures aimed at the development imperative may conflict with policies relating to conserving the environment. Against this background, the paper tries to examine the relationship between energy use and development at the macro and micro levels and how energy use affects the environment. This study is exploratory and relies on traditional literature review. Our study relates to nonrenewable energy sources in the context of developing countries. We find that there is no uniformity of results in the relationship between energy use, development and the state of the environment. We recommend further studies to ascertain the causes of such inconclusiveness. At the household level, people are deprived of the assured and adequate supply of efficient fuels for domestic use. Hence, policy measures should strive to ensure ease of access to reliable and affordable energy sources as development proceeds. &nbsp

Turbulence in mobile-bed streams

This study is devoted to quantify the near-bed turbulence parameters in mobile-bed flows with bed-load transport. A reduction in near-bed velocity fluctuations due to the decrease of flow velocity relative to particle velocity of the transporting particles results in an excessive near-bed damping in Reynolds shear stress (RSS) distributions. The bed particles are associated with the momentum provided from the flow to maintain their motion overcoming the bed resistance. It leads to a reduction in RSS magnitude over the entire flow depth. In the logarithmic law, the von Kármán coefficient decreases in presence of bed-load transport. The turbulent kinetic energy budget reveals that for the bed-load transport, the pressure energy diffusion rate near the bed changes sharply to a negative magnitude, implying a gain in turbulence production. According to the quadrant analysis, sweep events in mobile-bed flows are the principal mechanism of bed-load transport. The universal probability density functions for turbulence parameters given by Bose and Dey have been successfully applied in mobile-bed flows

Sequential Reattempt of Telecloning

The task of a telecloning protocol is to send an arbitrary qubit possessed by a sender to multiple receivers. Instead of performing Bell measurement at the sender's node, if one applies unsharp measurement, we show that the shared state can be recycled for further telecloning protocol. Specifically, in case of a single sender and two receivers, the maximal attempting number, which is defined as the maximum number of rounds used by the channel to obtain quantum advantage in the fidelity, turns out to be three both for optimal and nonoptimal shared states for telecloning while the maximal number reduces to two in case of three receivers. Although the original telecloning with quantum advantage being possible for arbitrary numbers of receivers, we report that the recycling of resources is not possible in telecloning involving a single sender and more than three receivers, thereby demonstrating a no-go theorem. We also connect the maximal achievable fidelities in each round with the bipartite entanglement content of the reduced state between the sender and one of the receivers as well as with the monogamy score of entanglement.Comment: v1: 12 pages, 5 figures; v2: 13 pages, 5 figures; close to the publish versio

Welfare v. Consent: On the Optimal Penalty for Harassment

The economic approach to determine optimal legal policies involves maximizing a social welfare function. We propose an alternative: a consent-approach that seeks to promote consensual interactions and deter non-consensual interactions. The consent-approach does not rest upon inter-personal utility comparisons or value judgments about preferences. It does not require any additional information relative to the welfare-approach. We highlight the contrast between the welfare-approach and the consent-approach using a stylized model inspired by seminal cases of harassment and the #MeToo movement. The social welfare maximizing penalty for harassment in our model can be zero under the welfare-approach but not under the consent-approach.Comment: 38 pages, 3 figure

A study of prevalence of metabolic syndrome in patients with type 2 diabetes mellitus in a tertiary care referral hospital in West Bengal

Background: The terms "metabolic syndrome", "insulin resistance syndrome" and "syndrome X" are now used specifically to define a constellation of abnormalities that is associated with increased risk for the development of type 2 diabetes and atherosclerotic vascular disease. It is a state of chronic low grade inflammation with the profound systemic effects. Several organisations gave several criteria to diagnose it. Effective preventive approaches include lifestyle changes, primarily weight loss, diet, and exercise, the appropriate use of pharmacological agents to reduce the specific risk factors.Methods: A cross-sectional study was done to evaluate the co-morbidity profile of patients, with metabolic syndrome and correlate clinical manifestations with specific components or metabolic syndrome, at the OPD of Bankura Sammilani Medical College and Hospitals, West Bengal. American Association of Clinical Endocrinologists criteria were chosen for diagnosis.Results: 100 patients were recruited having type II diabetes mellitus. Most of the patients were male between 20-70 years and maximum was on oral hypoglycemic agent with app 40% patient was without any glycemic control. In comorbidities hypertension was highest, followed by coronary artery disease, hypothyroidism and cerebrovascular accident. Waist-hip ratio was highest in female. All of the patients were having some cardiac risk factor assessed by ECG, echocardiography and thread mill test.Conclusions: The data demonstrates that metabolic syndrome is extremely common among diabetic patients. Frequency was much higher in women than men. Obesity is a key element in causing the metabolic syndrome and this factor was also more common in women