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Characterization of optical transitions of Eu^(3+) in lanthanum oxychloride nanophosphor

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Journal of Rare Earths 2011年第4期29卷 345-348页

作者： A. choubey S. Som M. Biswas S.K. Sharma Department of Applied Physics Indian School of Mines Dhanbad 826004 India

This paper presented the studies on the optical properties and calculation of spectral parameters of europium doped lanthanum oxychloride nanophosphor for their possible applications in optoelectronic devices. The compound was doped with 0.1 mol% Eu3＋ ions. The X-ray diffraction study of prepared sample suggested the tetragonal structure with particle size in the range of 18–21 nm. The photoluminescence （PL） emission spectra showed the bright emission in orange-red region from 580 to 630 nm. The most intense emission peak at 621 nm was due to transition 5D0→7F2 in energy levels of Eu3＋ ions. The spectral parameters were calculated from the absorption and emission spectra using Judd-Ofelt intensity parameters. The calculated values of the oscillator strength corresponding to the three transitions 7F1→5D1, 7F1→5D2 and 7F0→5D2 observed at 535, 472 and 465 nm in absorption spectra were 0.30×10–6, 1.36×10–6 and 0.63×10–6, respectively. The value of transi- tion probability （A）, stimulated emission cross-section （） and radiative lifetime （τrad） corresponding to 621 nm emission peak （transition 5D0→7F2） were 308 s–1, 1.22×10–21 cm2 and 3.24×10–3 s, respectively.

关键词： X-ray diffraction optical absorption photoluminescence spectral parameters rare earths

Merits and Demerits of AI in HR

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Management Studies 2021年第5期9卷 412-415页

作者： Swati choubey Bahman Zohuri Department of Business Management International Technological UniversitySanta ClaraCaliforniaUSA International Technological University Santa ClaraCaliforniaUSA

This paper details the origins of Human Resources(HR),describes its applied field of Human Resource Management(HRM)and its latest reincarnation Human Capital Management(HRM).The paper then focuses on how field of Artificial Intelligence(AI)has influenced the field of HRM and finally bring to light the benefits and limitations of AI in HRM.

关键词： human resources artificial intelligence recruitment human resource management

Effect of Anisotropy,Temperature,Strain Rate on Deep Drawing Using Conical Die

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Journal of Metallic Material Research 2020年第1期3卷 20-24页

作者： Ajay Kumar choubey C.Sasikumar Department of Mechanical Engineering SIRTBhopalIndia Department of MME MANITBhopalIndia

This paper covers the role of anisotropy,temperature,and strain rate on the flow behavior of the material when a conical die is used instead of conventional blank *** effect of anisotropy was investigated using Lankford’s coefficient(r)in three directions(0°,45°,and 90°).The effect of working temperatures(Room temperature,100°C-300°C)on drawing stress and strain rate sensitivity on punch pressure were also investigated in *** APDL was used to investigate the effects of temperature,strain rate and *** simulation results have confirmed that the strain variation in the direction of r0 and r45 are more than the variation of r90.

关键词： Blank-holder Conical die Deep drawing

Collagen membrane for reconstruction of soft tissue defects after surgery of oral cancer and precancer:a brief review

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Plastic and Aesthetic Research 2016年第1期3卷 100-105页

作者： Ankita Vastani Nishant Chourasia Vedant Pahlajani Suryakant choubey Department of Oral and Maxillofacial Surgery Rishi Raj College of Dental Sciences and Research CentreGandhinagarBhopal 464026India

There are some surgeries after which a temporary cover for raw wounds is required to ensure *** of those circumstances are loss of tissue due to burns,trauma,amputation,chronic ulcer,leprosy,and skin graft *** the body initiates regeneration mechanisms,however the time taken for complete healing of wounds is ***,there is a tendency for long standing wounds to undergo infection and *** mucosa is no exception to scarring and infection of wounds and there has always been a search for new materials that can be used for coverage of oral *** collagen is one such grafting *** the years collagen implant solutions for a number of clinical applications include general surgery,burn surgery,neurosurgery,plastic and reconstructive surgery,oral surgery,and peripheral nerve and tendon *** paper aims to focus on collagen as an effective option of wound closure in plastic and reconstructive surgery of the head and neck,especially after loss of soft tissue following resection of oral malignancies.

关键词： Collagen oral mucosa grafting oral submucous fibrosis oral cancer

A study on drug utilization and prescription habits of physicians in a government homeopathic hospital in West Bengal, India

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Journal of Integrative Medicine 2013年第5期11卷 305-313页

作者： Munmun Koley Subhranil Saha Jogendra Singh Arya Gurudev choubey Shubhamoy Ghosh Rajib Purkait Ramkumar Mondal Bapi Kundu Rajarshi Mukherjee Clinical Research Unit (Homeopathy) Central Council for Research in Homeopathy Mahesh Bhattacharyya Homeopathic Medical College and Hospital Government of West Bengal West Bengal University of Health Sciences

Improper prescribing habits and inappropriate drug use lead to serious health and economic consequences. This study was undertaken to evaluate drug utilization services and prescription patterns of homeopathic doctors in a government homeopathic teaching hospital in India. METHODS： No standardized homeopathic drug use indicators are available. The researchers used indicators for health care setting （drug availability）-modified prescribing indicators and patient care indicators, based on World Health Organization＇s core drug use indicators. A cross- sectional, prospective, institutional, observational study of 2-month duration with record analysis was conducted on 600 patients visiting seven different outpatient departments （OPDs） for the first time at Mahesh Bhattacharyya Homeopathic Medical College ＆ Hospital, Howrah, West Bengal, India, using the developed indicators. RESULTS： Overall availability of prescribed drugs was quite satisfactory （92.28%）. Centesimal potencies accounted for the majority of prescriptions （74.76%）. There was a poor record of diagnosis （39.17%） except in the OPDs of Gynecology and Obstetrics （68.48%, P 〈 0.01） and Dermatology （64.58%, P 〈 0.01）. Records of investigational findings and ongoing therapies, if any, were also poor except OPDs of Gynecology and Obstetrics, and Pediatrics. Structure of prescriptions was maintained satisfactorily in all the OPDs. Though tendency of using ＇individualized homeopathy＇ predominated, there also existed the use of ＇polypharmacy＇. Mean consultation time was 5.9 min. Labeling was extremely poor and is an area needing improvement. The prescriptions were highly legible. CONCLUSION： This was a preliminary study, conducted for the first time in homeopathy using newly developed indicators that yield meaningful results. Further studies are necessary in order to evaluate the different factors involved and to plan future interventions to improve the quality of care in healthcare settings.

关键词： homeopathy prescriptions, drug durg utilization hospital

Medicine prescription practices of homeopathic undergraduate students in West Bengal,India

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Journal of Integrative Medicine 2014年第1期12卷 7-12页

作者： Subhranil Saha Munmun Koley Jogendra Singh Arya Gurudev choubey Shubhamoy Ghosh Subhasish Ganguly Aloke Ghosh Sangita Saha Malay Mundle Clinical Research Unit(Homeopathy) Siliguri 734006DarjeelingWest BengalIndia under Central Council for Research in Homeopathy Government of India Department of Pathology and Microbiology Mahesh Bhattacharyya Homeopathic Medical College and Hospital Department of Organon of Medicine and Homeopathic Philosophy D N De Homeopathic Medical College and Hospital Department of Organon of Medicine and Homeopathic Philosophy Midnapore Homeopathic Medical College and Hospital Department of Organon of Medicine and Homeopathic Philosophy Calcutta Homeopathic Medical College and Hospital Department of Community Medicine Medical College of Kolkata

OBJECTIVE： To our knowledge, prescription of homeopathic medicines by homeopathic undergraduate students has not been studied before though it may possess serious implications. We aimed to determine the practice and attitudes of prescription by homeopathic undergraduate students. METHODS： A cross-sectional study was carried out involving all the students from four government homeopathic schools of West Bengal, India. Ethical requirements were ensured and data were collected using self-administered questionnaires. Chi-square tests and logistic univariate regression analyses were performed to identify associations and differences. RESULTS： A total of 328 forms were completed. Of these, 264 （80.5%） homeopathic undergraduate students admitted of prescribing medicines independently and most （40.5%） said that they did this 2-3 times a year. The most common reasons for this were ＇urgency of the problem＇（35.2%）, ＇previous experience with same kind of illness＇（31.8%）, and ＇the problem too trivial to go to a doctor＇（25.8%）. About 63.4% of the students thought that it was alright to independently diagnose an illness while 51.2% thought that it was alright for them to prescribe medicines to others. Common conditions encountered were fever, indigestion, and injury. Students who prescribed medicines were more likely to belong to Calcutta Homeopathic Medical College and Hospital （odds ratio = 5.8; 95% confidence interval 2.247-14.972）. Prescription by students gradually increased with academic years of homeopathic schools. Many students thought it was alright for students to diagnose and treat illnesses. CONCLUSION： Prescription of medicines by homeopathic undergraduate students is quite rampant and corrective measures are warranted.

关键词： homeopathy education, medical, undergraduate India prescriptions, drug practice, institutional drug use, irrational