16,191 research outputs found

    An Experiment and Detection Scheme for Cavity-based Cold Dark Matter Searches

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    A resonance detection scheme and some useful ideas for cavity-based searches of light cold dark matter particles (such as axions) are presented, as an effort to aid in the on-going endeavors in this direction as well as for future experiments, especially in possibly developing a table-top experiment. The scheme is based on our idea of a resonant detector, incorporating an integrated Tunnel Diode (TD) and a GaAs HEMT/HFET (High Electron Mobility Transistor/Heterogenous FET) transistor amplifier, weakly coupled to a cavity in a strong transverse magnetic field. The TD-amplifier combination is suggested as a sensitive and simple technique to facilitate resonance detection within the cavity while maintaining excellent noise performance, whereas our proposed Halbach magnet array could serve as a low-noise and permanent solution replacing the conventional electromagnets scheme. We present some preliminary test results which demonstrate resonance detection from simulated test signals in a small optimal axion mass range with superior Signal-to-Noise Ratios (SNR). Our suggested design also contains an overview of a simpler on-resonance dc signal read-out scheme replacing the complicated heterodyne readout. We believe that all these factors and our propositions could possibly improve or at least simplify the resonance detection and read-out in cavity-based DM particle detection searches (and other spectroscopy applications) and reduce the complications (and associated costs), in addition to reducing the electromagnetic interference and background.Comment: 22 pages, 7 figure

    Storage aware data management system for Genomics

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    In recent years, nucleotide sequencing has become increasingly instrumental in both research and clinical settings. This has led to explosive growth in sequencing data produced worldwide along with an increase in complex analysis algorithms. As the amount of data and analysis increases, so does the need for automated solutions for processing and analysis. The concept of workflows has gained favor in the bioinformatics community, but there is little in the scientific literature describing end-to-end operational automation systems. We provided an automation system that aims at providing a solution to the genomics related operational challenges that face sequencing of both research and clinical facilities. We built on existing open-source technologies, with a modular design allowing for a community-driven effort to create plug and play services. In this research, we describe the system and elaborate on the underlying conceptual framework. Which can be reduced to 3 conceptual levels: Data tagging (using metadata automation), Classifying Storage systems (the steps involved in the classification of storage systems), and execution (using a series of rules to move data around on an operational level)

    THE PHYSIOLOGICAL RESPONSE OF CARDIORESPIRATORY FITNESS PARAMETERS TO EXERCISE IN PREDIABETIC POPULATION: AN EXPERIMENTAL PRE- POST DESIGN

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    Background: The cardiorespiratory fitness in prediabetic population at pre- and post-interventional stage after 8 weeks of moderate intensity exercise was determined. This study is part of PhD project and carried out in Physiology department, Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan. Methods: It was an experimental study design. Adult prediabetics (n=50), 22 females and 28 males of 18 to 35y age group were included in the study. Diagnosis of prediabetes was made with HbA1c falling in the range of 5.7– 6.4%, and fasting blood glucose (100-125mg/dL). Cardiorespiratory fitness parameters (Ventilation, oxygen consumed during exercise VO2, carbon dioxide exhaled VCO2, metabolic equivalents (ME), heart rate (HR), heart rate reserve (HRR), rate of carbohydrate oxidation (RCHO), fat oxidation (RFO) and energy expenditure (EE)) were determined at pre- and post-exercise intervention using breath-by-breath analyzer. The participants performed moderate exercise protocol of 30 min with HRmax% of 70 ± 5% for 5 days a week for 8 weeks during their leisure time, monitored with pedometers. Results: The results showed a significant improvement in cardiorespiratory fitness parameters at post exercise analysis.  Similar changes were observed for fasting blood glucose (P value < 0.001)  and HbA1c (P value < 0.001).Conclusion: Moderate physical activity for 8 weeks showed significant Improvement in cardiorespiratory fitness parameters and glycemic status of patients with prediabetes

    MATLAB Simulink model of a photovoltaic cell

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    Материалы XVIII Междунар. науч.-техн. конф. студентов, аспирантов и молодых ученых, Гомель, 26–27 апр. 2018 г

    Prevalence and association of obesity with self-reported comorbidity: a cross-sectional study of 1321 adult participants in Lasbela, Balochistan

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    Association of fatness with chronic metabolic diseases is a well-established fact, and a high prevalence of risk factors for these disorders has increasingly been reported in the third world. In order to incorporate any preventive strategies for such risk factors into clinical practice, decision-makers require objective evidence about the associated burden of disease. A cross-sectional study of 1321 adults from one of the districts of Balochistan, among the most economically challenged areas of Pakistan, was carried out for the measures of fatness and self-reported comorbidities. Body mass index (BMI), waist circumference (WC), and waist-to-hip ratio (WHR) were measured and demographic information and self-reported comorbidities were documented.The prevalence of obesity was 4.8% (95% CI: [3.8, 6.1]) and 21.7% (95% CI: [19.5, 24.0]), as defined by the World Health Organization (WHO) international and Asia/Asia-Pacific BMI cut-offs, respectively. The proportion exhibiting comorbidity increased with increasing levels of fatness in a dose-response relationship
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