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Modelling and analysis of COVID-19 epidemic in India

Journal of Safety Science and Resilience 2020年第2期1卷 135-140页

作者： alok tiwari Department of Energy Science and Engineering IIT BombayMumbai 400076India

COVID-19 epidemic is declared as the public health emergency of international concern by the World Health Organisation in the last week of March *** disease originated from China in December 2019 has already caused havoc around the world,including *** first case in India was reported on 30th January 2020,with the cases crossing 4 million on the day paper was *** pandemic has caused more than 80,000 fatalities with 3 million *** lockdown of the nation for two months,immediate isolation of infected cases and app-based tracing of infected are some of the proactive steps taken by the *** a better understanding of the evolution of COVID-19 in the world,study on evolution and growth of cases in India could not be *** understand the same,one of the compartment model:Susceptible-Infectious-Quarantined-Recovered(SIQR)is *** rate and doubling rate of the total reported positive cases in the country had crossed 75%and 25 days,*** is also estimated that there is a strong positive correlation between testing rate and detection of new cases up to 6 million tests per *** the SIQR modelling effective reproduction number,epidemic doubling rate and infected to quarantined ratio is determined to check the temporal evolution of the pandemic in the *** reproduction number that was at its peak during first half of the April is gradually converging to *** is also estimated using this model that with each detected cases in India,there could be 10-50 undetected *** every mathematical model,this model also has some *** make this model more robust,a technique with weighted parameter that can avoid a person with a strong immune system to be equally vulnerable to the infection,can be worked *** learning algorithms can also be used to train our model with the data of other countries to make the analysis and prediction more precise and accurate.

关键词： Mathematical modelling SIQR COVID 19 Reproduction number India

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Primary Extra-Gastrointestinal Stromal Tumor (GIST) arising from mesentery of small bowel and presenting as abdominal mass: A rare entity

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Open Journal of Gastroenterology 2013年第5期3卷 267-271页

作者： alok Kumar tiwari Anil Kumar Choudhary Hemant Khowal Poras Chaudhary Mohinder P. Arora Department of Surgery Dr R.M.L Hospital New Delhi India Department of Surgery Lady Hardinge Medical College New Delhi India

Introduction: Majority of mesenchymal tumors of gastrointestinal tract are Gastrointestinal Stromal Tumor (GIST). It is, however, a rare tumor, accounting for less than 1% of primary gastrointestinal (GI) neoplasms. Though, these tumors are refractory to conventional chemotherapy or radiotherapy but show a good response to targeted adjuvant chemotherapy with tyrosine kinase inhibitors following surgical resection. Case Report: we report here a case of primary Extra-GIST tumor arising from mesentry of small bowel near duodeno-jejunal junction in a 69 years old male patient. The patient presented with a palpable mass in upper abdomen for past 15 days. On examination, a non-tender mobile lump of size around 17 × 10 cm, with bosselated surface and firm in consistency was palpable involving epigastric, left hypochondrium and umbilical region. Contrast enhanced computed tomography of abdomen revealed a heterogenous mesentric mass. On surgical intervention a mass was found involving mesentery near dudenojejunal junction without involvement of gastrointestinal tract. Complete surgical resection of the tumor was done and adjuvant chemotherapy with Imatinib mesylate was started as HPE revealing GIST with mitotic index of >10/50 HPF and 17 × 10 cm size placed the patient in high risk category. Patient was discharged on 12th of post-operative day with advice of regular follow-up. Conclusion: GIST occurrence is not restricted to bowel but can involve unusual sites also. The mainstay of treatment remains surgical resection with adequate margin. In cases where tumour has malignant potential (high mitotic figures on histopathology) adjuvent treatment with tyrosine kinase may prevent or delay relapse.

关键词： Extra-Gastrointestinal Stromal Tumors GIST Mesentric Tumors Imatinib Mesylate Abdominal Mass

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SHIELDED SUSPENDED COUPLED DIELECTRIC GUIDE AND DIRECTIONAL COUPLER

SHIELDED SUSPENDED COUPLED DIELECTRIC GUIDE AND DIRECTIONAL ...

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The 2nd International Conference on Millimeter Wave and Far-Infrared Technology

作者： alok Kumar Rastogi A.K.tiwari Department of Physics Dept.of Electronics Engineering

＜正＞A shielded suspended coupled dielectric guide was analyzed using the effective dielectric constant *** dispersion characteristics of shielded suspended coupled dielectric guides have been plotted for various dimensional *** the dispersion characteristics the wave impedances have also been *** computing the even and odd mode propagation constants,various directional couplers have been obtained.

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