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Dewan, Abhinav,Sharma, SK,Dewan, AK.,Srivastava, Himanshu,Rawat, Sheh,Kakria, Anjali,Mishra, Maninder,Suresh, T,Mehrotra, Krati Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.3
Objective of the study is to evaluate volumetric and dosimetric alterations taking place during radiotherapy for locally advanced head and neck cancer (LAHNC) and to assess benefit of replanning in them. Materials and Methods: Thirty patients with LAHNC fulfilling the inclusion and exclusion criteria were enrolled in a prospective study. Planning scans were acquired both pre-treatment and after 20 fractions (mid-course) of radiotherapy. Single plan (OPLAN) based on initial CT scan was generated and executed for entire treatment course. Beam configuration of OPLAN was applied to anatomy of interim scan and a hybrid plan (HPLAN30) was generated. Adaptive replanning (RPLAN30) for remaining fractions was done and dose distribution with and without replanning compared for remaining fractions. Results: Substantial shrinkage of target volume (TV) and parotids after 4 weeks of radiotherapy was reported (p<0.05). No significant difference between planned and delivered doses was seen for remaining fractions. Hybrid plans showed increase in delivered dose to spinal cord and parotids for remaining fractions. Interim replanning improved homogeneity of treatment plan and significantly reduced doses to cord (Dmax, D2% and D1%) and ipsilateral parotid (D33%, D50% and D66%) (p<0.05). Conclusions: Use of one or two mid-treatment CT scans and replanning provides greater normal tissue sparing along with improved TV coverage.
GROWTH OF POLYNOMIALS HAVING ZEROS ON THE DISK
Dewan, K.K.,Ahuja, Arty The Korean Society for Computational and Applied M 2014 Journal of applied mathematics & informatics Vol.32 No.3
A well known result due to Ankeny and Rivlin [1] states that if $p(z)={\sum}^n_{j=0}a_jz^j$ is a polynomial of degree n satisfying $p(z){\neq}0$ for |z| < 1, then for $R{\geq}1$ $$\max_{{\mid}z{\mid}=R}{\mid}p(z){\mid}{\leq}{\frac{R^n+1}{2}}\max_{{\mid}z{\mid}=1}{\mid}p(z){\mid}$$. It was proposed by Professor R.P. Boas Jr. to obtain an inequality analogous to this inequality for polynomials having no zeros in |z| < k, k > 0. In this paper, we obtain some results in this direction, by considering polynomials of degree $n{\geq}2$, having all its zeros on the disk |z| = k, $k{\leq}1$.
Working Women’s Strategy for Work-Care Balance : The Case of University of Dhaka, Bangladesh
Dewan Mahboob HOSSAIN,Rohaiza ROKIS 이화여자대학교 아시아여성학센터 2014 Asian Journal of Women's Studies(AJWS) Vol.20 No.3
কর্মজীবী মহিলাদের কাজ এবং পরিবারের মধ্যে ভারসাম্য রক্ষার বিষয়টি গবেষকদের কাছে অনেক গুরুত্ব পেয়েছে। তবে এ বিষয়ে বেশ ীরভাগ গবেষনাতেই প্রাধান্য পেয়েছে উন্নত এবং কিছু উন্নয়নশী ল দেশগুলো এবং কম উন্নত ও অনুন্নত দেশগুলি তেমন প্রাধান্য পায়নি। এই নিবন্ধে এই গবেষণা ঘাটতিটি পুরণ করার চেষ্টা করা হ য়েছে। এখানে একটি অনুন্নত দেশ - বাংলাদেশের সবচেয়ে পুরনো বিশ্ববিদ্যালয় - ঢাকা বিশ্ববিদ্যালয়ের মহিলা শিক্ষকদের উপর এ কটি কেস স্টাডি গবেষণা করে দেখার চেষ্টা করা হয়েছে কিভাবে এই মহিলারা তাদের কাজ ও পরিবারের মধ্যে ভারসাম্য রক্ষা করেন। গবেষণায় এটা দেখা গিয়েছে যে এই বিশ্ববিদ্যালয়ের মহিলা শিক্ষকে রা তাদের কাজের চেয়ে পারিবারিক জীবনকে বেশি গুরুত্ব দেন যেটা অন্যান্য দেশের কর্মজীবী মহিলাদের চেয়ে খুব একটা ভিন্ন কিছু ন য়। তথাপি এই মহিলাদের বিশ্ববিদ্যালয়ের কিছু অনানুষ্ঠানিক প্র্যা কটিসকে কাজে লাগিয়ে কাজ এবং পরিবারের মধ্যে ভারসাম্য রক্ষার অনন্য কৌশলগুলি যথেষ্ট গুরুত্ব পাওয়ার দাবি রাখে। The issue of balancing between home and work by working women has received much importance in research around the world. Distinctively, in Bangladesh, a lot of literature on women’s issues is focused on less educated women in low-income groups. This article, however, is based on the experience of highly educated female teaching staff of the University of Dhaka, Bangladesh—one of the oldest public universities in a less developed country—and focuses on the strategies they employ to balance their jobs and family lives. This study concludes that the female teaching staff of this university place greater emphasis on their families rather than their professional careers, which is not surprising. Nonetheless, their unique strategies in employing several informal flexible practices within the university, in order to maintain a balance between work and care, is indeed a story that needs to be told.
Joint reliability importance of series-parallel systems
Dewan, I.,Jain, K. The Korean Reliability Society 2011 International Journal of Reliability and Applicati Vol.12 No.2
A series-parallel system with independent but non-identical components is considered. The expressions have been derived for the joint reliability importance (JRI) of m (${\geq}2$) components, chosen from a series-parallel system. JRIs of components of two different series-parallel systems are studied analytically and graphically.
Patella dislocation: an online systematic video analysis of the mechanism of injury
Dewan V.,Webb M. S. L.,Prakash D.,Malik A.,Gella S.,Kipps C. 대한슬관절학회 2020 대한슬관절학회지 Vol.32 No.-
Background: The mechanism of injury (MoI) for a patellar dislocation has not been fully established. The aim of this study was to use systematic video analysis to determine the MoI of a patella dislocation. Methods: A systematic search was conducted of three video sharing websites and three popular search engines to identify videos demonstrating a patellar dislocation. Videos were reviewed by three surgeons trained in systematic video analysis, who commented on the position of the lower limb and the situation in which the injury occurred. The results were reviewed to build a consensus of the MoI for each video. Statistical analysis was conducted for interobserver agreement (p < 0.05). Results: Initial search yielded 603 videos with 13 meeting the inclusion criteria. The injuries were sustained performing a sporting activity (n = 9) or whilst dancing (n = 4). The injury was predominantly sustained during a non-contact situation (n = 10). The most common mechanism was an unbalanced individual with a flexed hip sustaining a valgus force to their flexed knee with the tibia externally rotated. Conclusions: This study provides some insight into the MoI for a patellar dislocation and the findings may assist in developing injury prevention programmes and rehabilitation protocols as well as guiding future research.