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Secure Spread-Spectrum Watermarking for Telemedicine Applications

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Journal of Information Security 2011年第2期2卷 91-98页

作者： Basant Kumar Harsh vikram singh Surya Pal singh Anand Mohan 不详

This paper presents a secure spread-spectrum watermarking algorithm for digital images in discrete wavelet transform (DWT) domain. The algorithm is applied for embedding watermarks like patient identification /source identification or doctors signature in binary image format into host digital radiological image for potential telemedicine applications. Performance of the algorithm is analysed by varying the gain factor, subband decomposition levels, size of watermark, wavelet filters and medical image modalities. Simulation results show that the proposed method achieves higher security and robustness against various attacks.

关键词： Watermarking Spread-Spectrum Discrete Wavelet Transform Telemedicine

Road traffic accidents in hilly regions of northern India: What has to be done?

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World Journal of Emergency Medicine 2014年第2期5卷 112-115页

作者： Anil Kumar Joshi Chitra Joshi Mridu singh vikram singh V.C.S.G. Government Medical Sciences & Research Institute Srinagar Garhwal AIIMS Jodhpur

BACKGROUND: Road traffi c accidents(RTA) are responsible for 1.2 million deaths worldwide each year. RTA will become the 3rd largest contributor to the global burden of diseases after ischemic heart diseases(IHD) and depression. We conducted a retrospective study on RTA in a tertiary center in the hilly district of Uttarakhand in ***: The number of RTA, pattern of RTA, the number of patients killed and injured, the pattern of injury causing death and disability, the severity of accidents, and the type of disability were noted from December 2009 to November 2011. The accident severity was calculated as the number of patients killed per 100 accidents. The methods for reducing the incidence of RTA were observed, and the role of policy makers was ***: The majority of deaths and disabilities in Uttarakhand were due to road traffic accidents in the hilly districts of the states. The most common cause of RTA was driving fault followed by defective ***: Proper designing of roads and minimizing the fault of drivers are essential to prevent road traffi c accidents in hilly regions.

关键词： Road traffi c accidents Hilly regions India

Synthesis,characterization and properties of noble metal decorated iso-polyoctatungates organametallic clusters

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Synthesis,characterization and properties of noble metal dec...

Synthesis,Crystal Structure of a New Rubidium Directed Anderson-type Polyoxometalate Coordination Polymer

中国化学会第八届全国配位化学会议

作者： vikram singh Pengtao Ma Jingyang Niu Henan Key Laboratory of Polyoxometalate Chemistry College of Chemistry and Chemical Engineering Henan University

Polyoxometalates(POMs) have recieved a great deal of attention because of their diverse coordination chemistry,fascinating structures and plethora of applications in various fields like catalysis,optical and conducting materials,applications in medicine,magnetism and WOC catalysis ***,novel metal POMs based compounds are increasingly studied particularly for their promising role in WOCs activity,as noble metal substituted POMs can endure fast,reversible,and stepwise multielectron-transfer ***,we report two new noble metals[Cp*M](M= Rh/Ir) decorated isopolyoctatungstate organometallic compounds of the formula[(Cp*M)} W O]·16 H O(Cp = Methylcyclopentadiene,M = Rh(1),Ir(2).The structures of 1 and2 feature four methylcyclopentadienyl substituted rhodium/iridium metals bonded to the tungstate trimer,[W O].The three tungsten atoms are arranged in trigonal plane of the pseudo-cuboidal ring with fourth vacant site occupied by two {Cp*M}(1) cationic fragments.

关键词： Polyoxometalate organometallics iso-polytungstate

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Synthesis,Crystal Structure of a New Rubidium Directed Ander...

Wooden stick penetration from the perineal region up to the thorax

中国化学会第六届全国多酸化学学术研讨会

作者： vikram singh Pengtao Ma Jingyang Niu Henan Key Laboratory of Polyoxometalate Chemistry College of Chemistry and Chemical Engineering Henan University

Polyoxometalates are metal oxygen clusters with structural features and fascinating properties. The multitude of potential applications has led to significant advancement in polyoxometalates over the recent years. Amongst them, the Anderson type polyoxometalate is a unique class with well ordered inorganic building blocks that can coordinate with various transition metal atoms. Herein, we report a new rubidium directed polyoxometalate coordination polymer of the formula [Cr MoOHRb]n. The newly

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World Journal of Emergency Medicine 2015年第4期6卷 305-307页

作者： Khem Pal singh Anil Kumar Joshi Mohit Kumar Joshi Chitra Joshi Mridu singh vikram singh V.C.S.G.Government Medical Sciences & Research Institute

BACKGROUND: Penetrating injuries of the perineum are rare but very dangerous. Since the genitourinary and colorectal organs may be injured, how to evaluate surgical management of the injury is very ***: The present report presents a case of penetrating injury of the perineum by a wooden stick when the patient fell on the upright wooden stick from a tree. The three feet long stick entered the perineal region just left lateral to the anal opening. Upon reaching the thoracic cavity, it broke and only a foot stick was left in the subcutaneous plane. These injuries are potentially serious with risk of damage to multiple organs. Exploratory laprotomy was done, and bladder injury was repaired. The entry wound and the track of stick was thoroughly washed and allowed for secondary intention ***: The post operative period was uneventful and the patient recovered ***: Meticulous evaluation and surgical management of perineal injuries are the key to prevent devastating complications.

关键词： Penetrating injury Perineal region Perineal injuries

Isolation, purification and characterization of an N-acetyl-D-lactosamine binding mitogenic and anti-proliferative lectin from tubers of a cobra lily Arisaema utile Schott

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Advances in Bioscience and Biotechnology 2010年第2期1卷 79-90页

作者： vikram Dhuna Kshitija Dhuna Jatinder singh Ajit Kumar Saxena Satyam Kumar Agrawal Sukhdev singh Kamboj 不详

Lectins are the carbohydrate-binding proteins of non-immune origin which have been the subject of intense investigation over the last few decades owing to the variety of interesting biological properties. Most of the lectins which have been purified and characterized from plants have been obtained from dicotyledons. In the present study a lectin was purified from tubers of a monocot plant Arisaema utile (AUL) Schott by affinity chromatography on asialofetuin-linked amino activated silica beads. AUL gave a single band in SDS-PAGE at pH 8.3 corresponding to subunit Mr 13.5 kDa. The native molecular mass of AUL was 54 kDa suggesting a homotetrameric structure. AUL gave multiple bands in isoelectric focusing and in native PAGE at pH 8.3. AUL was inhibited by N-acetyl-D-lactosamine (Lac NAc), a disaccharide and asialofetuin, a complex desialylated serum glycoprotein. When treated with denaturing agents, the lectin was stable in the presence of urea (3 M), thiourea (4 M) and guanidine HCl (4 M). AUL was a glycoprotein with a carbohydrate content of 1.2%. Complete loss of activity was observed upon modification of tryptophan residues of the lectin. The activity was reduced to 25% after modification of tyrosine. Chemical modification of arginine, histidine, serine and cysteine residues of AUL did not affect its activity. Using Far UV CD spectra the estimated secondary structure was 37% α-helix, 25% β-sheet and 38% random contributions. The lectin showed potent mitogenic response towards human lymphocytes. In vitro anti-proliferative assay using 11 human cancer cell lines resulted in 50% inhibition of six cell lines viz. SW-620, HCT-15, SK-N-SH, IMR-32, Colo-205 and HT-29 at 38, 42, 43, 49, 50 and 89 µg/ml, respectively.

关键词： N-acetyl-D-lactosamine Arisaema Utile Affinity Purification Anti-Proliferative Asialofetuin Chemical Modification Lectin Mitogenicity

An Ethylene Over-Producing Mutant of Tomato (<i>Solanum lycopersicum</i>), Epinastic, Exhibits Tolerance to High Temperature Conditions

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American Journal of Plant Sciences 2021年第4期12卷 487-497页

作者： Sridharan Jegadeesan Etan Pressman Avital Beery vikram singh Lázaro Eustáquio Pereira Peres Sara Shabtai Nurit Firon Department of Vegetable and Field Crops Institute of Plant Sciences Agricultural Research Organization The Volcani Center Rishon LeZion Israel Field Application Scientist Premas Life Sciences Bangalore India Laboratory of Hormonal Control of Plant Development Departamento de Ciências Biológicas Escola Superior de Agricultura “Luiz de Queiroz” Universidade de Sao Paulo Piracicaba Brazil

Above-optimal temperatures reduce yield in many crops, including tomato, largely because of the heat-sensitivity of their reproduction process. A full understanding of heat-stress (HS) response and thermotolerance of tomato reproduction is still lacking. Recently, using external application of the plant hormone ethylene, it was demonstrated that ethylene plays a role in heat-tolerance of tomato pollen (the male reproductive cells). In order to expand our understanding on involvement of ethylene in tomato pollen thermotolerance, we analyzed the response of wild type and ethylene-related tomato mutant plants to HS, at physiological and molecular levels. We report that mild chronic HS conditions highly reduce the number of viable and germinating pollen grains as well as the production of seeded fruits in wild type tomato plants, while no significant reduction was detected/observed in pollen quality, number of seeded fruits and seeds per fruit in plants of the ethylene over-producer mutant epinastic. Our findings suggest that ethylene is involved in thermotolerance of tomato reproduction, pointing to an effect on pollen viability and germination potential, highlighting candidate genes involved in pollen response to HS (like SlHSP17, SlHSP101, SlMBF1) and suggesting directions for further studies.

关键词： Ethylene Mild Chronic Heat Stress Pollen Grains Reproduction Solanum lycopersicum Thermotolerance

Microstructural relation of macerals with mineral matter in coals from Ib valley and Umaria, Son-Mahanadi basin, India

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International Journal of Coal Science & Technology 2017年第2期4卷 191-197页

作者： Vivek Mishra K. N. singh CSIR - National Metallurgical Laboratory Jamshedpur 831007 India School of Studies in Earth Science Vikram UniversityUjjain 456010 India

Coal petrology provides significant inputs for the industrial utilisation of coal and for broad understanding the coal formation and diagenesis. The present paper entails the results of the investigations carded out on the selected coal samples, from Ib valley and Umaria coalfield, using scanning electron microscope （SEM） and X-ray diffraction （XRD） to study the surface microstructures and minerals present in them and the relationship of the finely dispersed mineral matter with the organic constituents. This would further help in evaluating the distribution and chemical character of the mineral matter occurring within the maceral types. Ib valley and Umaria coals are typical Indian （Lower Gondwana） non-coking coals and only scanty data is available on SEM study of these coals. Under SEM examination, it manifests that, the mineral matters of these coal occur as deep intergrowth, massive impregnation, superficial mounting, filling and depletion of micropores, mechanical cavity filling and fusinitic cavity filling.

关键词： Coal SEM XRD Umaria coal Ib valley coal India

On Pairwise Singular Sets and Pairwise Singular Maps

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Journal of Mathematics and System Science 2014年第4期4卷 261-268页

作者： Rina Pankaj Verma Mamta singh School of Studies in Mathematics Vikram University Ujjain (M.P.) India Department of Appl. Sci. & Comp. Tech. Bundelkhand University Jhansi India

In this paper we introduce the concept of pairwise singular sets and pairwise singular maps between pairwise locally compact and pairwise hausdorff spaces and study the properties of pairwise singular maps.

关键词： Pairwise singular sets pairwise singular maps