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国外作物育种 2002年第2期21卷 23-24页

作者： s.shrivastava 向平等

肾移植术后输尿管狭窄球囊扩张术后的移植物和病人长期生存率:23年回顾性对比研究

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国际医学放射学杂志 2016年第6期 695-696页

作者： s.Kumar J.H.Jeon A.Hakim s.shrivastava D.Banerjee U.Patel 胡伟杰 Department of Radiology(U.P.) St George's University Hospitals NHS Foundation TrustUniversity of London

摘要目的研究肾移植术后发生输尿管狭窄的病人在行肾输尿管狭窄经皮输尿管成形术后的移植物和病人的长期生存率,并将结果与未发生输尿管狭窄的病人进行比较。

关键词：输尿管狭窄肾移植术后移植物病人球囊扩张术生存率回顾性

Robust Facial Biometric Authentication system Using Pupillary Light Reflex for Liveness Detection of Facial Images

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Computer Modeling in Engineering & sciences 2024年第4期139卷 725-739页

作者： Puja s.Prasad Adepu sree Lakshmi sandeep Kautish simar Preet singh Rajesh Kumar shrivastava Abdulaziz s.Almazyad Hossam M.Zawbaa Ali Wagdy Mohamed CsE Department Geethanjali College of EngineeringHyderabadTelangana501301India Department of Computer science LBEF CampusKathmandu44600Nepal school of Computer science Engineering and Technology(sCsET) Bennett UniversityGreater Noida201310India Department of Computer Engineering College of Computer and Information SciencesKing Saud UniversityP.O.Box 51178Riyadh11543Saudi Arabia CeADAR Ireland’s Centre for AI Technological University DublinDublinD07 EWV4Ireland Operations Research Department Faculty of Graduate Studies for Statistical ResearchCairo UniversityGiza12613Egypt Applied science Research Center Applied Science Private UniversityAmman11937Jordan

Pupil dynamics are the important characteristics of face spoofing *** face recognition system is one of the most used biometrics for authenticating individual *** main threats to the facial recognition system are different types of presentation attacks like print attacks,3D mask attacks,replay attacks,*** proposed model uses pupil characteristics for liveness detection during the authentication *** pupillary light reflex is an involuntary reaction controlling the pupil’s diameter at different light *** proposed framework consists of two-phase *** the first phase,the pupil’s diameter is calculated by applying stimulus(light)in one eye of the subject and calculating the constriction of the pupil size on both eyes in different video *** above measurement is converted into feature space using Kohn and Clynes model-defined *** support Vector Machine is used to classify legitimate subjects when the diameter change is normal(or when the eye is alive)or illegitimate subjects when there is no change or abnormal oscillations of pupil behavior due to the presence of printed photograph,video,or 3D mask of the subject in front of the *** the second phase,we perform the facial recognition ***-invariant feature transform(sIFT)is used to find the features from the facial images,with each feature having a size of a 128-dimensional *** features are scale,rotation,and orientation invariant and are used for recognizing facial *** brute force matching algorithm is used for matching features of two different *** threshold value we considered is 0.08 for good *** analyze the performance of the framework,we tested our model in two Face antispoofing datasets named Replay attack datasets and CAsIA-sURF datasets,which were used because they contain the videos of the subjects in each sample having three modalities(RGB,IR,Depth).The CAsIA-sURF datasets showed an 89.9%Equal Err

关键词： sIFT pupil CAsIA-sURF pupillary light reflex replay attack dataset brute force

Ibrutinib and atrial fibrillation:An in-depth review of clinical implications and management strategies

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World Journal of Cardiology 2024年第5期16卷 269-273页

作者： Moiud Mohyeldin shitij shrivastava sai Vishnu Vardhan Allu Internal Medicine University of Medical Sciences and TechnologyKhartoum 11111Sudan Internal Medicine Bronxcare Health SystemBronxNY 10457United States

Ibrutinib,a targeted therapy for B-cell malignancies,has shown remarkable efficacy in treating various hematologic ***,its clinical use has raised concerns regarding cardiovascular complications,notably atrial fibrillation(AF).This comprehensive review critically evaluates the association between ibrutinib and AF by examining incidence,risk factors,mechanistic links,and management *** an extensive analysis of original research articles,this review elucidates the complex interplay between ibrutinib’s therapeutic benefits and cardiovascular ***,it highlights the need for personalized treatment approaches,vigilant monitoring,and interdisciplinary collaboration to optimize patient outcomes and safety in the context of ibrutinib *** review provides a valuable resource for healthcare professionals aiming to navigate the intricacies of ibrutinib’s therapeutic landscape while prioritizing patient well-being.

关键词： Ibrutinib Bruton’s tyrosine kinase inhibitor Atrial fibrillation Cardiovascular risk Management strategies

Understanding and controlling the variables for stromal vascular fraction therapy

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World Journal of stem Cells 2024年第8期16卷 784-798页

作者： Naveen Jeyaraman sandeep shrivastava VR Ravi Arulkumar Nallakumarasamy Aditya Pundkar Madhan Jeyaraman Department of Orthopaedics Datta Meghe Institute of Higher Education and ResearchWardha 442004MaharashtraIndia Regenerative Medicine Mother Cell Regenerative CentreTiruchirappalli 620017Tamil NaduIndia Department of Orthopaedics Jawaharlal Nehru Medical CollegeDatta Meghe Institute of Higher Education and ResearchWardha 442004MaharashtraIndia Department of Orthopaedics ACS Medical College and HospitalDr MGR Educational and Research InstituteChennai 600077Tamil NaduIndia

In regenerative medicine,the isolation of mesenchymal stromal cells(MsCs)from the adipose tissue’s stromal vascular fraction(sVF)is a critical area of *** review meticulously examines the isolation process of MsCs,starting with the extraction of adipose *** choice of liposuction technique,anatomical site,and immediate processing are essential to maintain cell *** delve into the intricacies of enzymatic digestion,emphasizing the fine-tuning of enzyme concentrations to maximize cell yield while preventing *** review then outlines the filtration and centrifugation techniques necessary for isolating a purified sVF,alongside cell viability assessments like flow cytometry,which are vital for confirming the efficacy of the isolated *** discuss the advantages and drawbacks of using autologous vs allogeneic sVF sources,touching upon immunocompatibility and logistical considerations,as well as the variability inherent in donor-derived *** choices,the selection between hypo-dermic needles vs liposuction cannulas,and the role of adipose tissue lysers in achieving cellular dissociation are evaluated for their impact on sVF *** protocols are also analyzed for their part in ensuring the integrity of the *** necessity for standardized MsC isolation protocols is highlighted,promoting reproducibility and successful clinical *** encourage ongoing research to deepen the understanding of MsC biology and therapeutic action,aiming to further the field of regenerative *** review concludes with a call for rigorous research,interdisciplinary collaboration,and strict adherence to ethical and regulatory standards to safeguard patient safety and optimize treatment outcomes with MsCs.

关键词： Mesenchymal stromal cells stromal vascular fraction Adipose tissue Autologous stromal vascular fraction stromal vascular fraction isolation

A rare case report:tubercular spondylodiscitis following lumbar disc surgery

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Asian Pacific Journal of Tropical Medicine 2010年第6期3卷 496-498页

作者： R Dulani s.shrivastava P singh India

Postoperative spondylodiscitis is a rare but serious complication after lumbar disc *** cases are due to more virulent organisms such as staphylococcus aureus and *** case of post operative tubercular spondylodiscitis has been reported till date to our knowledge. We are reporting a case of tubercular spondylodiscitis followed by lumbar disc surgery of L2-3 level.

关键词： spondylodiscitis Tubercular Lumbar disc surgery

Bridging the semantic gap with human perception based features for scene categorization

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International Journal of Intelligent Computing and Cybernetics 2017年第3期10卷 387-406页

作者： Padmavati shrivastava K.K.Bhoyar A.s.Zadgaonkar Dr.C.V.Raman University BilaspurIndia Department of Information Technology Yeshwantrao Chavan College of EngineeringNagpurIndia

Purpose–The purpose of this paper is to build a classification system which mimics the perceptual ability of human vision,in gathering knowledge about the structure,content and the surrounding environment of a real-world natural scene,at a quick glance *** paper proposes a set of novel features to determine the gist of a given scene based on dominant color,dominant direction,openness and roughness ***/methodology/approach–The classification system is designed at two different *** the first level,a set of low level features are extracted for each semantic *** the second level the extracted features are subjected to the process of feature evaluation,based on inter-class and intra-class *** most discriminating features are retained and used for training the support vector machine(sVM)classifier for two different data ***–Accuracy of the proposed system has been evaluated on two data sets:the well-known Oliva-Torralba data set and the customized image data set comprising of high-resolution images of natural *** experimentation on these two data sets with the proposed novel feature set and sVM classifier has provided 92.68 percent average classification accuracy,using ten-fold cross validation *** set of proposed features efficiently represent visual information and are therefore capable of narrowing the semantic gap between low-level image representation and high-level human ***/value–The method presented in this paper represents a new approach for extracting low-level features of reduced dimensionality that is able to model human perception for the task of scene *** methods of mapping primitive features to high-level features are intuitive to the user and are capable of reducing the semantic *** proposed feature evaluation technique is general and can be applied across any domain.

关键词： Openness Roughness Human perception JND p-value scene classification semantic gap Feature elevation Dominant direction

studies on long lasting optical properties of Eu^(2+) and Dy^(3+) doped di-barium magnesium silicate phosphors

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Chinese Chemical Letters 2015年第9期26卷 1187-1190页

作者： Ravi shrivastava Jagjeet Kaur Govt.VYT PG Autonomous College

Di-barium magnesium silicate phosphors doped with europium and dysprosium were prepared under a weak reducing atmosphere.X-ray diffraction pattern of the sample was also done that confirmed the proper preparation of the *** electron microscope（sEM） images confirmed that the sample has regular surface and uniform grain size *** studies of phosphorescence decay of Ba2Mgsi2O7：Eu^2＋,Dy^3＋ phosphors with different concentration of Dy^3＋ were *** phosphor with 0.5/1.5 mol%of Eu/Dy,exhibited optimum green color afterglow *** emission is expected to arise due to transition of Eu^2＋ ions from any of the sublevels of 4f^65d^1 configuration to ^8s（7/2） level of the 4f7 *** a suitable trap depth,the trap concentration is expected to be proportional to the concentration of Dy^3＋.These traps are responsible for holding the charge career for a reasonable time,subsequently for increasing the time of ***,optimum Dy3＊ concentration produces the longer afterglow duration with higher intensity of luminescence *** depth were also calculated using thermoluminescence glow curve which was indicative of formation of traps suitable for long afterglow.

关键词： Phosphorescence XRD Persistence luminescence Trapping center

Effect of rock joint roughness on its cyclic shear behavior

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第6期9卷 1071-1084页

作者： s.M.Mahdi Niktabar K.seshagiri Rao Amit Kumar shrivastava Department of Civil Engineering Indian Institute of Technology Delhi Department of Civil Engineering Delhi Technology University

Rock joints are often subjected to dynamic loads induced by earthquake and blasting during mining and rock cutting. Hence, cyclic shear load can be induced along the joints and it is important to evaluate the shear behavior of rock joint under this condition. In the present study, synthetic rock joints were prepared with plaster of Paris(Po P). Regular joints were simulated by keeping regular asperity with asperity angles of 15°-15° and 30°-30°, and irregular rock joints which are closer to natural joints were replicated by keeping the asperity angles of 15°-30° and 15°-45°. The sample size and amplitude of roughness were kept the same for both regular and irregular joints which were 298 mm×298 mm×125 mm and 5 mm, respectively. shear test was performed on these joints using a large-scale direct shear testing machine by keeping the frequency and amplitude of shear load under constant cyclic condition with different normal stress values. As expected, the shear strength of rock joints increased with the increases in the asperity angle and normal load during the first cycle of shearing or static load. With the increase of the number of shear cycles, the shear strength decreased for all the asperity angles but the rate of reduction was more in case of high asperity angles. Test results indicated that shear strength of irregular joints was higher than that of regular joints at different cycles of shearing at low normal stress. shearing and degradation of joint asperities on regular joints were the same between loading and unloading, but different for irregular joints. shear strength and joint degradation were more significant on the slope of asperity with higher angles on the irregular joint until two angles of asperities became equal during the cycle of shearing and it started behaving like regular joints for subsequent cycles.

关键词： Cyclic shear test shear behavior shear strength Regular joint Irregular joint Joint dilation Asperity degradation

Qualitative study to identify the perception and challenges faced by the faculty of community medicine in the implementation of competency-based medical education for postgraduate students

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Family Medicine and Community Health 2019年第1期7卷 20-25页

作者： saurabh Rambiharilal shrivastava Prateek saurabh shrivastava Department of Community Medicine Shri Sathya Sai Medical College&Research InstituteKancheepuramIndia

Objectives To identify perception about the key aspects of competency-based medical education(CBME)among community medicine faculty members and to ascertain the various challenges faced by them during its *** A descriptive qualitative study of 2 months’duration was conducted among the faculty members of the community medicine ***-probability purposive sampling was employed in the *** listing was done initially to elicit the views of faculty members to meet the intended *** Anthropac software was used to identify the salient variables using smith’s salience score,and then pile sorting was done to identify the association between the salient *** Three faculty members participated in the free listing and pile sorting.A total of 20 responses were obtained pertaining to the key aspects of CBME,of which 12 were identified as the salient variables depending on the cut-off value of 0.125(smith’s salience score)and subjected to pile ***,eight challenges were identified in the implementation of the programme during the free listing,and all were included in the second stage of pile *** maps were drawn to understand the relationship between the key aspects of CBME and involved challenges *** On employing the free listing and pile sorting methods,formulation of entrustable professional activities and their assessment using appropriate tools were the identified crucial areas in CBME,while the lack of sensitisation of stakeholders and inadequate planning were identified as the predominant challenges in the implementation of CBME.

关键词： education sorting qualitative