Characterisation of an RPC prototype with moderate resistivity plates using tetrafluoroethane (C2H2F4C_2H_2F_4)

Keeping in mind the requirements of high rate capable, cost effective, large area detectors to be used in future high energy physics experiments, commercially available bakelite plates having moderate bulk resistivity are used to build an RPC module. The chamber is tested with cosmic rays in the avalanche mode using 100\% Tetrafluoroethane ($C_2H_2F_4$). Standard NIM electronics are used for this study. The efficiency, noise rate and time resolution are measured. The detailed method of measurement and the first test results are presented.Comment: 6 pages, 5 figures, XV Workshop on Resistive Plate Chambers and Related Detectors - RPC2020 (Accepted manuscript

Atiyah sequences and connections on principal bundles over differentiable stacks

We construct and study general connections on Lie groupoids and differentiable stacks as well as on principal bundles over them using Atiyah sequences associated to transversal tangential distributions.Comment: comments are welcom

Chern-Weil theory for principal bundles over Lie groupoids and differentiable stacks

Let $\mathbb{X}=[X_1\rightrightarrows X_0]$ be a Lie groupoid equipped with a connection, given by a smooth distribution $\mathcal{H} \subset T X_1$ transversal to the fibers of the source map. Under the assumption that the distribution $\mathcal{H}$ is integrable, we define a version of de Rham cohomology for the pair $(\mathbb{X}, \mathcal{H})$, and we study connections on principal $G$-bundles over $(\mathbb{X}, \mathcal{H})$ in terms of the associated Atiyah sequence of vector bundles. We also discuss associated constructions for differentiable stacks. Finally, we develop the corresponding Chern-Weil theory and describe characteristic classes of principal $G$-bundles over a pair $(\mathbb{X}, \mathcal{H})$.Comment: comments are welcom

Rationality of utilization of antimicrobial agents in medical intensive care unit of a tertiary care hospital

Background: Patients admitted to intensive care unit receive multiple medications of different pharmacological classes due to various life threatening ailments. This study was conducted to assess the patterns of usage of antimicrobial agents in medical ICU of a tertiary care hospital and to suggest necessary modifications in prescribing patterns to achieve rational therapeutic practices.Methods: A cross-sectional observational study was carried out at ICU of the tertiary care hospital for 6 months. From the inpatient case record of ICU relevant data on prescription of each patient was collected. The demographic status, disease data and the utilization of different antimicrobial drug classes and individual drugs were analysed.Results: Of 753 patients admitted in the medical ICU during the study period, 640 consecutive patients were included for analysis. Male to female ratio was 1.45. Mean age was 63.32±17.93 years. Extensive poly-pharmacy (100%) and drugs with non-generic name (73%) noticed among the prescriptions.Average number of drugs per prescription was 12.1±2.13. Penicillins (51.87%) and cephalosporins (45.78%) were most commonly used antimicrobial drug classes. Piperacillin (37.03%), ceftriaxone (33.28%) and levofloxacin (22.5%) were commonly used antimicrobial drugs. A total of 181 prescriptions contained two and 138 contained three antimicrobial drugs. Piperacillin+tazobactam(37.03%) was the most common fixed dose combination noticed.Conclusions: Overall extensive poly-pharmacy and drugs with non-generic name noticed among the prescriptions. Few interventional programs should be aimed at control of infections, rational antimicrobial drug prescription to minimize adverse drug events, emergence of bacterial resistance and attenuating unnecessary cost

Evaluation of pharmacology teaching-learning methods in a government medical college

Background: Pharmacology is a major subject in medical science and always changing, so according to it pharmacologists also need to reform their teaching method. Students’ opinion in this evaluation of teaching is a good option.Methods: A questionnaire based study was conducted in Burdwan Medical College on 230 students of two batches.Results: One forty eight students thought that the subject was interesting. Twenty eight percent students opined that Pharmacology class was not interesting. Students found interest mostly in prescription writing, drug interaction and therapeutic problems in practical section. Though 53.4% found pharmacy was less interest. They suggested some reforms in teaching, 61.3% voted for introduction of audio-visual aid and 74.3% response on clinical demonstration in hospital ward. According to 82.6% students, there should be more problem solving exercise during teaching pharmacology; giving hand-out before everyday class, class in clinical setting and more emphasis on clinical pharmacology were also needed. MCQ exam only (31%) and written viva both (51%) were good ways of evaluation according to them.Conclusions: This study helps in knowing students’ opinion and preferences in curriculum to make it more interesting and aids to modify the undergraduate Pharmacology teaching pattern