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Development of Palmprint verification System Using Biometrics

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软件学报 2006年第8期17卷 1824-1836页

作者： G. Shobha M. krishna S.C. sharma R.v. College of Engineering Mysore Road Bangalore 560059 India

Palmprint verification system using Biometrics is one of the emerging technologies, which recognizes a person based on the principle lines, wrinkles and ridges on the surface of the palm. These line structures are stable and remain unchanged throughout the life of an individual. More importantly, no two palmprints from different individuals are the same, and normally people do not feel uneasy to have their palmprint images taken for testing. Therefore palmprint recognition offers a promising future for medium-security access control systems. In this paper, a new approach for personal authentication using hand images is discussed. Gray-Scale palm images are captured using a digital camera at a resolution of 640×480. Each of these gray-scale images is aligned and then used to extract palmprint and hand geometry features. These features are then used for authenticating users. The image acquisition setup used here is inherently simple and it does not employ any special illumination nor does it use any pegs that might cause any inconvenience to users. Experimental results show that the designed system achieves an acceptable level of performance.

关键词：灰色图象边缘追踪顶点检测验证系统

自由取向炭/炭复合材料的新型制备及工艺优化（英文）

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新型炭材料 2018年第5期33卷 424-433页

作者： Thakur Sudesh kumar Raunija Rajeev.k.Gautam Sharad Chandra sharma Anil verma Carbon and Ceramics Laboratory Materials and Mechanical EntityVikram Sarabhai Space Centre Indian Space Research OrganisationThiruvananthapuram 695022KeralaIndia Sustainable Environergy Research Lab(SERL) Department of Chemical Engineering Indian Institute of Technology DelhiHauz-KhasNew Delhi 110016India Materials and Metallurgy Group Materials and Mechanical EntityVikram Sarabhai Space Centre Indian Space Research OrganisationThiruvananthapuram 695022KeralaIndia

采用在炭纤维束的内部浸润熔融沥青的传统方法制备得到的炭/炭(C/C)复合材料难以实现细旦化水平,这是因为单束丝中含有数千根丝,经浸渍后沥青附着,从而引起沥青局部渗出,以及因不均匀沥青稳定性而导致微观结构不均匀。本文通过稳定的中... 详细信息

采用在炭纤维束的内部浸润熔融沥青的传统方法制备得到的炭/炭(C/C)复合材料难以实现细旦化水平,这是因为单束丝中含有数千根丝,经浸渍后沥青附着,从而引起沥青局部渗出,以及因不均匀沥青稳定性而导致微观结构不均匀。本文通过稳定的中间相沥青和分散的短切炭纤维混合、热压和炭化过程制备出细旦化水平的C/C复合材料。探讨了工艺参数对中间相沥青残炭率的影响。通过残炭率/工艺时间、残炭率!(表观密度/实密度)来优化工艺参数。结果表明,通过此法得到了细旦化水平的中间相沥青与炭纤维复合材料。中间相沥青的残炭率随加热升温速率、沥青/炭纤维质量比的增加而降低;随热压压力而增加。在高压力和高质量比下,发生沥青局部渗出。通过调控得到最佳的C/C复合材料制备工艺参数为:热压压力15 MPa,升温速率0. 2℃/min及沥青/炭纤维质量比1∶1。

关键词：石油沥青中间相沥青短切炭纤维热压产率

A catalyst-free new polyol method synthesized hot-pressed Cu-doped Bi2S3 nanorods and their thermoelectric properties

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Nano Research 2016年第11期9卷 3291-3304页

作者： Tarachand v.k.sh sharma Ranu Bhatt vedachalaiyer Ganesan Gunadhor Singh Okram UGC-DAE Consortium for Scientific Research Indore 452001 India Technical Physics Division Bhabha Atomic Research Centre Mumbai 400085 India

This is the first report on the thermoelectric properties of a catalyst-free polyol method used to prepare stoichiometric Bi2-xCuxS3 samples, x = 0.1, 0.2, 0.3, 0.4, via hot pressing. various systematic approaches to arrive at in their stoichiometric compositions are explored precisely with introduction of excess precursor of S. X-ray diffraction data analysis using Rietveld refinement confirms a polyhedral orthorhombic crystal structure with a space group Pnma, in contrast to Pbnm reported earlier. Raman data further substantiates this. X-ray photoelectron spectroscopy confirms the valence states of the constituent elements （Bi^3＋, Cu^2＋, and S^2-） and energy dispersive X-ray analysis corroborates their compositions. The particle sizes of the pure Bi2S3 nanoparticles were 20, 35, and 82 nm as determined from the Scherrer formula, atomic force microscopy, and dynamic light scattering, respectively. Their transmission electron microscopy image shows rod-like nanostructures elongated in the 〈010〉 direction with an average diameter of 23 nm and a length of several hundreds of nanometers. A 34% improvement in the thermoelectric figure of merit is observed for Bi.6Cu0.4S3 as compared to pure Bi2S3 at 300 k.

关键词： Bi2S3 polyol nanorods thermoelectrics

Transanal endoscopic microsurgery: The first attempt in treatment of rectal amyloidoma

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World Journal of Gastroenterology 2015年第4期21卷 1324-1328页

作者： Richa sharma virgilio v George Department of General Surgery School of MedicineIndiana UniversityIndianapolisIN 46202United States

Localized amyloidosis is characterized by amyloid protein deposition restricted to one organ or tissue without systemic involvement. Gastrointestinal manifestations of localized amyloidoma are unusual, which makes amyloidoma restricted to the rectum a very rare diagnosis requiring a high index of suspicion. We present a rare account for rectal amyloidoma with an unusual presentation of obstructive symptoms and its treatment using a sophisticated surgical modality, transanal endoscopic microsurgery(TEM), which resulted in complete excision of the lesion without hospitalization and complications. The successful treatment for thisrectal amyloidoma using TEM emphasizes the need to broaden its application in the treatment of various rectal lesions while preserving organ function and decreasing recurrence.

关键词： Transanal endoscopic microsurgery Amyloidoma Local

Torrent Control and Stabilization through Bio-engineering Measures in North Western Himalayan Region

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Journal of Agricultural Science and Technology 2011年第2期5卷 188-193页

作者： R. kumar I. P. sharma v. sharma Department of Soil Science and Water Management University of Horticulture and Forestry Nauni Solan （HP） 173 230 India

The study revealed that low cost bio-engineering measures using local grass （Saccharum munja）, shrubs （vitex negundo and Ipomea spp.） and trees （Acacia nilotica and Acacia catechu） along with loose boulder structures （spurs, check dams and gully plugs） of suitable design and dimensions were very effective in channelizing the torrent water flow towards central line and its stabilization. In the catchment, small to medium sized gullies were treated with gully plugging by erecting loose boulder check dams along with suitable vegetative barriers ofSaccharum munja and Ipomea spp. to stop their further advancement. Different treatments of these combinations trapped the sediment to the tune of 5-15 tonnes and it was stabilized at the spur tails. In this, attractive type spur trapped the maximum sediment. The D-50 analysis of sediment deposited was also carried out and the value varied from 3.1-3.7 mm, implying deposition of higher percentage of finer fertile soil proportion and its stabilization. The mechanical as well as vegetative measures helped in the channelization of water course towards the central line to the tune of 10-80 m. The stream banks were stabilized by plantations and put to use under agro forestry systems. Different treatments in catchment, with regard to their efficacy to reduce runoff, ground water recharge, sediment and channel morphology resulted in reclamation of 43 ha area of the torrent bed.

关键词： Eco system land degradation soil erosion torrent water shed bio-engineering measures D-50 analysis.

Delamination in Fiber Reinforced Plastics: A Finite Element Approach

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Engineering（科研） 2011年第5期3卷 549-554页

作者： P. k. Rakesh v. sharma I. Singh D. kumar 不详

The fiber reinforced plastics (FRPs) are being used widely in the most diverse applications ranging from the aerospace to the sports goods industry. Drilling in particular is important to facilitate the assembly operations of structurally intricate composite products. The drilling of holes in FRPs leads to drilling induced damage which is an important research area. The researchers worldwide have tried to minimize the damage by optimizing the operating variables, and tool designs as well as by developing unconventional methods of hole making. Most of the work done so far has been experimental in nature with little or no focus on numerical simulation of the drilling behavior of FRPs. In the present research endeavor, a finite element model has been developed to investigate the drilling induced damage of FRP laminates.

关键词： Drilling Delamination Finite Element Analysis

Fauna-associated Changes in Chemical and Biochemical Properties of Soil

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Biomedical and Environmental Sciences 2006年第6期19卷 422-426页

作者： G. TRIPATHI B. M. sharma Department of Zoology J. N. V. UniversityJodhpur-342 001India

Objective To study the impacts of abundance of woodlice, termites, and mites on some functional aspects of soil in order to elucidate the specific role of soil fauna in improving soil fertility in desert. Methods Fauna-rich sites were selected as experimental sites and adjacent areas were taken as control, Soil samples were collected from both sites. Soil respiration was measured at both sites. The soil samples were sent to laboratory, their chemical and biochemical properties were analyzed. Results Woodlice showed 25% decrease in organic carbon and organic matter as compared to control site. Whereas termites and mites showed 58% and 16% decrease in organic carbon and organic matter. In contrast, available nitrogen （nitrate and ammonical both） and phosphorus exhibited 2-fold and 1.2-fold increase, respectively. Soil respiration and dehydrogenase activity at the sites rich in woodlice, termites and mites produced 2.5-, 3.5- and 2-fold increases, respectively as compared to their control values. Fauna-associated increase in these biological parameters clearly reflected fauna-induced microbial activity in soil. Maximum decrease in organic carbon and increase in nitrate-nitrogen and ammonical-nitrogen, available phosphorus, soil respiration and dehydrogenase activity were produced by termites and minimum by mites reflecting termite as an efficient soil improver in desert environment. Conclusion The soil fauna-associated changes in chemical （organic carbon, nitrate-nitrogen, ammonical-nitrogen, phosphorus） and biochemical （soil respiration, dehydrogenase activity） properties of soil improve soil health and help in conservation of desert pedoecosystem.

关键词： Soil fauna Organic carbon Nitrogen Phosphorus Soil respiration Dehydrogenase activity

Cathodic adsorptive stripping voltammetry of an anti-emetic agent Granisetron in pharmaceutical formulation and biological matrix

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Journal of Pharmaceutical Analysis 2012年第6期2卷 443-449页

作者： Rajeev Jain Ramkishor sharma School of Studies in Chemistry Jiwaji University

Granisetron showed one well-defined reduction peak at Hanging Mercury Drop Electrode （HMDE） in the potential range from -1.3 to -1.5 v due to reduction of C=N bond. Solid-phase extraction technique was employed for extraction of Granisetron from spiked human plasma. Granisetron showed peak current enhancement of 4.45% at square-wave voltammetry and 5.33% at cyclic voltammetry as compared with the non stripping techniques. The proposed voltammetric method allowed quantification of Granisetron in pharmaceutical formulation over the target concentration range of 5-200 ng/mL with detection limit 13.63 ng/mL, whereas in human plasma 50-225 ng/mL with detection limit 11.75 ng/mL.

关键词： Granisetron Human plasma Solid-phase extraction Pharmaceuticalformulation voltammetry Hanging mercury dropelectrode

voltammetric quantification of anti-hepatitis drug Adefovir in biological matrix and pharmaceutical formulation

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Journal of Pharmaceutical Analysis 2012年第2期2卷 98-104页

作者： Rajeev Jain Ramkishor sharma School of Studies in Chemistry Jiwaji University

Electrochemical reduction behavior of Adefovir was studied using Hanging Mercury Drop Electrode (HMDE) in Britton-Robinson (BR) buffer *** study showed one well-defined reduction peak in the potential range -1.2 to -1.4 v (***/AgCl) due to reduction of C=N bond of the imidazole ***-phase extraction and protein-precipitation techniques were employed for extraction of Adefovir from human *** proposed method allows quantification of Adefovir in human plasma over the concentration range 0.50-5.00 μg/mL with the detection limit 0.17 μg/mL,whereas in pharmaceutical formulation 0.25-2.25 μg/mL with the detection limit 0.08 μg/mL.

关键词： voltammetry Adefovir Solid-phase extraction Protein-precipitation Human plasma Pharmaceutical formulation