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- 저자 : Charu Sharma (검색결과 4 건)
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Impact of gamma radiation on 8051 microcontroller performance
Sharma Charu,Rajesh Puspalata,Behera R.P.,Amirthapandian S. 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.12
Studying the effects of gamma radiation on the instrumentation and control (I&C) system of a nuclear power plant is critical to the successful and reliable operation of the plant. In the accidental scenario, the adverse environment of ionizing radiation affects the performance of the I&C system and it leads to inaccurate and incomprehensible results. This paper reports the effects of gamma radiation on the AT89C51RD2, a commercial-off-the-shelf 8-bit high-performance flash microcontroller. The microcontroller, selected for the device under test for this study is used in the remote terminal unit for a nuclear power plant. The custom circuits were made to test the microcontroller under different gamma doses using a 60Co gamma source in both ex-situ and in-situ modes. The device was exposed to a maximum dose of 1.5 kGy. Under this hostile environment, the performance of the microcontroller was studied in terms of device current and voltage changes. It was observed that the microcontroller device can operate up to a total absorbed dose of approximately 0.6 kGy without any failure or degradation in its performance.
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Charu Sharma,Pratibha Singh,Shashank Shekhar,Abhishek Bhardwaj,Manisha Jhirwal,Navdeep Kaur Ghuman,Meenakshi Gothwal,Garima Yadav,Priyanka Kathuria,Vibha Mishra 대한산부인과학회 2023 Obstetrics & Gynecology Science Vol.66 No.4
Objective Due to its comprehensive, reliable, and valid format, the objective structured clinical examination (OSCE) is the gold standard for assessing the clinical competency of medical students. In the present study, we evaluated the importance of the OSCE as a learning tool for postgraduate (PG) residents assessing their junior undergraduate students. We further aimed to analyze quality improvement during the pre-coronavirus disease (COVID) and COVID periods. Methods This quality-improvement interventional study was conducted at the Department of Obstetrics and Gynecology. The PG residents were trained to conduct the OSCE. A formal feedback form was distributed to 22 participants, and their responses were analyzed using a five-point Likert scale. Fishbone analysis was performed, and the ‘plan-do-study-act’ (PDSA) cycle was implemented to improve the OSCE. Results Most of the residents (95%) believed that this examination system was extremely fair and covered a wide range of clinical skills and knowledge. Further, 4.5% believed it was more labor- and resource intensive and time-consuming. Eighteen (81.8%) residents stated that they had learned all three domains: communication skills, time management skills, and a stepwise approach to clinical scenarios. The PDSA cycle was run eight times, resulting in a dramatic improvement (from 30% to 70%) in the knowledge and clinical skills of PGs and the standard of OSCE. Conclusion The OSCE can be used as a learning tool for young assessors who are receptive to novel tools. The involvement of PGs in the OSCE improved their communication skills and helped overcome human resource limitations while manning various OSCE stations.
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SOME DIFFERENCE SEQUENCE SPACES OF INFINITE MATRIX AND ORLICZ FUNCTION
Kuldip Raj,CHARU SHARMA 장전수학회 2018 Advanced Studies in Contemporary Mathematics Vol.28 No.3
In this paper we introduce some generalized difference sequence spaces of ideal convergence, infinite matrix and sequence of Orlicz functions of order α over n-normed spaces. We study some basic topological and algebraic properties of these spaces. We also investigate some inclusion relations related to these spaces.
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Red cell alloimmunization in pregnancy: a study from a premier tertiary care centre of Western India
Meenakshi Gothwal,Pratibha Singh,Archana Bajpayee,Neha Agrawal,Garima Yadav,Charu Sharma 대한산부인과학회 2023 Obstetrics & Gynecology Science Vol.66 No.2
ObjectiveThe study was conducted to determine the frequency of alloimmunization to various blood group antibodies in pregnant women, and the risk of hemolytic disease in the fetus and newborn. MethodsAll antenatal women, irrespective of the period of gestation or obstetric history, were included, whereas those taking anti-D immune-prophylaxis or with a history of blood transfusion were excluded. Antibody screening and identification were performed using a Bio-Rad ID microtyping system. ResultsOf 2,084 antenatal females, 1,765 were D?antigen positive and 319 D?antigen negative. Sixty-five (3.119%) women alloimmunized. Out of 54 (2.591%) who had sensitized to D-antigen, 11 (0.527%) also sensitized to other antibodies. These 11 alloantibodies identified included: anti-M (n=6; 9.23%), anti-C (n=1; 3.076%), anti-E (n=1; 1.538%), anti-e (n=1; 1.538%), anti-Lewis (a) (n=1; 1.538%), and unspecified antibodies (n=1; 1.538%). Multiple antibodies were seen in four patients that combined: anti-D and anti-C (n=2; 3.076%), anti-e and anti-c (n=1; 1.538%), and anti-D and anti-G (n=1; 1.538%). ConclusionThe rate of alloimmunization in D-antigen-negative women was high. Apart from this, the alloimmunization rate in women with bad obstetric history was very high, at 8.1%. In developing countries such as India, universal antenatal antibody screening, though desirable, may not be justified at present, as the cost and infrastructure required would be immense because of the lower alloimmunization rates in RhD antigen-positive women. However, it is necessary to impose properly formulated protocols to screen pregnant women with bad obstetric history.
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