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Design of Hybrid True Random Number Generator for Cryptographic Applications

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Computer systems science & Engineering 2022年第11期43卷 423-437页

作者： s.Nithya Devi s.sasipriya Electronics and Communication Engineering Dr.N.G.P.Institute of TechnologyCoimbatore641110India Electronics and Communication Engineering Sri Krishna College of Engineering and TechnologyCoimbatore641008India

In real-time applications,unpredictable random numbers play a major role in providing cryptographic and encryption *** of the existing random number generators are embedded with the complex nature of an amplifier,ring oscillators,or ***,this research focused more on implementing a Hybrid Nature of a New Random Number *** key objective of the proposed methodology relies on the utilization of True random number *** randomness is *** additions of programmable delay lines will reduce the processing time and maintain the quality of *** performance comparisons are carried out with power,delay,and lookup *** proposed architecture was executed and verified using *** Hybrid TRNG is evaluated under simulation and the obtained results outperform the results of the conventional random generators based on slices,area and lookup *** experimental observations show that the proposed Hybrid True Random Number Generator(HTRNG)offers high operating speed and low power consumption.

关键词： True random number generators lookup table random number generator digital circuit seed

Prevalence and Factors Associated with sharing of Human Immunodeficiency seropositivity status among serodiscordant Couples in the City of Parakou (Benin)

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Open Journal of Epidemiology 2024年第1期14卷 1-18页

作者： Djossou sègnon Eurydice Elvire Damien Georgia Barikissou Meba Bio Mamatou Tokpanoude Ignace Ahanhanzo-Glele Rhonel Ataigba Iretinethania Elie Agossoukpe Benoit Kakpo-Zannou Rodrigue Kamoutchoni Corneille Aguemon Badirou Unité de santé publique de la Faculté des sciences de la santé (Fss) Universitéd’Abomey-Calavi (UAC) Cotonou Bénin Association des Médecins Communautaires de Bénin (AMCB) Parakou Bénin Association Béninoise pour la Promotion de la Famille (ABPF) Parakou Bénin Centre d’Information de Prospective d’Ecoute et de Conseil sur les IST/VIH/Sida du Borgou et de l’Alibori (CIPEC/B-A) Parakou Bénin Institut de Formation ensoinsInfirmiers et Obstétricaux (IFsIO) Faculté de Médecine (FMP) Parakou Bénin service de Psychiatrie Centre HospitalierUniversitaireDépartemental du BorgouAlibori (CHUD/B-A) Parakou Bénin service de Médecine Interne H&#244pital Saint-Jean de Dieu de Boko N’Dali Bénin

Introduction: In serodiscordant couples, sharing serostatus is a crucial step in the HIV risk management process. The aim of this study was to determine the prevalence and factors associated with serostatus sharing among HIV serodiscordant couples in the city of Parakou. setting and methods: This study was carried out in the city of Parakou, capital of northern Benin. It was a descriptive, analytical cross-sectional study with non-probability sampling for convenience. socio-demographic data, as well as data on antecedents, behaviours, social and marital life, were collected using a questionnaire gave to the participants. Clinical and therapeutic data were collected from patients’ medical records and follow-up charts. Data were analyzed and processed using R 4.3.1 software. The significance level was set at 5%, and logistic regression was used to identify potential predictors of shared serostatus among serodiscordant couples in the city of Parakou in 2022. Results: A total of 299 participants in long-term serodiscordant relationships were included in our study. The average age of the subjects was 37.55 ± 10.25 years. Women were the infected partner in 80.27% of cases. The most common level of education was secondary (33.45%). Most respondents (230 subjects, 76.92%) were married. The average duration of the couple’s relationship was 121.68 months ± 96.32. The most frequent screening circumstances were: Prevention of mother-to-child transmission (PMTCT) (50.84%) and hospital screening (26.09%). The infected partner shared his or her serostatus with his or her spouse in 47.83% of cases. Potential predictors of serostatus sharing within the couple were: marital status (p Conclusion: The sharing of serostatus within serodiscordant couples needs to be managed in a way that takes into account the social and marital characteristics of the couple.

关键词： serodiscordance sharing of serostatus HIV Partner Benin

青藏高原及邻区岩石圈应力状态特征及其地质意义

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中国科学：地球科学 2024年第6期54卷 1863-1882页

作者：张倩文徐亚褚伟路书鹏中国科学院地质与地球物理研究所中国科学院油气资源研究重点实验室北京100029 中国科学院大学地球与行星科学学院北京100049

青藏高原及邻区现今岩石圈应力状态受到岩石圈本身及下部地幔作用的共同控制,即受岩石圈内部密度分布变化造成重力势能差及地幔对流作用对岩石圈底部拖曳力共同影响.研究岩石圈应力状态对进一步认识青藏高原演化的动力学背景及机制具有... 详细信息

青藏高原及邻区现今岩石圈应力状态受到岩石圈本身及下部地幔作用的共同控制,即受岩石圈内部密度分布变化造成重力势能差及地幔对流作用对岩石圈底部拖曳力共同影响.研究岩石圈应力状态对进一步认识青藏高原演化的动力学背景及机制具有重要作用.本文利用Crust1.0地壳密度模型结合s40RTs地幔横波速度变化模型计算重力势能,利用EGM2008重力场模型计算地幔对流作用在岩石圈底部的拖曳力,通过求解薄板近似下的力平衡方程分别得到这两种力源的岩石圈应力场以及两种力源的联合应力场,综合分析青藏高原地区应力状态特征,并根据重力势能应力场、地幔拖曳力应力场、两种应力场的相对大小,以及两种应力场与地表形变的相关关系特征划分了6个区域.综合分析表明,塔里木盆地等稳定地块区的岩石圈应力场主要受重力势能差控制;印度板块与青藏高原碰撞带岩石圈应力场主要受控于深部地幔拖曳力;青藏高原内部岩石圈应力场受重力势能和地幔拖曳力共同控制.青藏高原东南缘岩石圈应力场与地表形变相关性较差,推测该地区由于存在有效黏度更低的下地壳流使壳幔解耦,地幔拖曳力对浅部地壳影响较弱,导致岩石圈平均应力场与地表形变不一致.

关键词：青藏高原重力势能地幔对流岩石圈偏应力场 GPs应变率场

Copy-Move Geometric Tampering Estimation Through Enhanced sIFT Detector Method

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Computer systems science & Engineering 2023年第1期44卷 157-171页

作者： J.s.sujin s.sophia Department of Electronics and Communication Engineering Sri Krishna College of TechnologyCoimbatore641042India Department of Electronics and Communication Engineering Sri Krishna College of Engineering and TechnologyCoimbatore641008India

Digital picture forgery detection has recently become a popular and sig-nificant topic in image *** to advancements in image processing and the availability of sophisticated software,picture fabrication may hide evidence and hinder the detection of such criminal *** practice of modifying origi-nal photographic images to generate a forged image is known as digital image forging.A section of an image is copied and pasted into another part of the same image to hide an item or duplicate particular image elements in copy-move *** order to make the forgeries real and inconspicuous,geometric or post-processing techniques are frequently performed on tampered regions during the tampering *** Copy-Move forgery detection,the high similarity between the tampered regions and the source regions has become crucial *** most frequent way for detecting copy-move forgeries is to partition the images into overlapping square blocks and utilize Discrete cosine transform(DCT)com-ponents as block *** to the high dimensionality of the feature space,Gaussian Radial basis function(RBF)kernel based Principal component analysis(PCA)is used to minimize the dimensionality of the feature vector repre-sentation,which improves feature matching *** this paper,we propose to use a novel enhanced scale-invariant feature transform(sIFT)detector method called as RootsIFT,combined with the similarity measures to mark the tampered areas in the *** proposed method outperforms existing state-of-the-art methods in terms of matching time complexity,detection reliability,and forgery location accuracy,according to the experimental *** F1 score of the proposed method is 92.3%while the literature methods are around 90%on an average.

关键词： Multi sensor data fusion discriminator orientation pose position mean average precision recall

Adipose-derived stem cell conditioned medium for the treatment of amyotrophic lateral sclerosis: pre-clinical evidence and potential for clinical application

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Neural Regeneration Research 2019年第9期14卷 1522-1524页

作者： Chandler l.Walker Department of Biomedical and Applied sciences Indiana University School of Dentistry

Amyotrophic lateral sclerosis(Als)is a devastating progressive neurodegenerative disease that causes death of upper and lower motor neurons(MNs)in the central nervous system(CNs).The disease afflicts most people in prime periods of productivity in life,and it is estimated approximately 200,000 individuals in the United states live with Als and any given *** a significant percentage of individuals with Als have a genetic or hereditary form of the disease,the majority are sporadic cases with unknown *** of cause,onset and progression of the disease is similar in all Als patients,with minor initial outward symptoms followed by rapid deterioration of motor function leading to widespread paralysis,respiratory dysfunction and *** the distressing and debilitating nature of Als,no cures and limited potential treatment options ***,identifying targets for effective therapy leading to delayed disease progression,increased quality of life,and extended lifespan are critical areas of *** addition,identifying biomarkers of disease progression is incredibly important as diagnosis often occurs once the disease is in late stages and lifespan is only an average of 3–5 years after *** the cellular and physiological processes known to influence or be involved in Als are numerous,the complexity of the disease is a major detriment in developing effective *** from the ubiquitous death of MNs,inflammatory and immunologic response in the spinal cord,brain and target muscles,and signal pathway changes that precede or are induced by MN death have been identified at multiple stages of disease progression.

关键词： Amyotrophic lateral devastating progressive neurodegenerative disease progression

Use of the Nitrogen Index to assess nitrate leaching and water drainage from plastic-mulched horticultural cropping systems of Florida

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International soil and Water Conservation Research 2016年第4期4卷 237-244页

作者： Edilene C.s.Marchi lincoln Zotarelli Jorge A.Delgado Diane l.Rowland Giuliano Marchi Instituto Federal de Educacao Ciencia e Tecnologia de BrasiliaCampus PlanaltinaDFRodovia DF-128-21-Zona Rural de PlanaltinaBrasilia-DF 73380-900Brazil University of Florida-Horticultural science Department 1241 Fifield HallGainesvilleFL 32611USA UsDA-ARs Soil Management and Sugar Beet Research Unit2150 Centre Ave.Building DSuite 100Fort CollinsCO 80526USA Agronomy Department University of FloridaGainesvilleFLUSA Embrapa Cerrados Rod.BR 020km 18CP 08223CEP73310-970 Planaltina DFBrazil

Water quality in Florida is significantly impacted by nitrate(NO_(3)-N)leaching losses from agriculture in a large part of the *** crops are planted across large areas of Florida on coarse sandy soils with low soil water retention and soil organic matter,increasing the potential for NO_(3)-N *** leaching losses from the root zone of vegetable cropping systems can negatively impact *** tools such as the Nitrogen Index(N-Index)are able to quickly assess N use efficiency and losses via NO_(3)-N leaching from agricultural ***,the N-Index provides technical information about N losses pathways tied to agricultural management practices with a great level of confidence;this information has been used by researchers,growers and policymakers as a decision support ***,the current version of the NIndex that has been used for different field crops has not been calibrated to be used in plastic-mulched horticultural cropping *** aim of this work was to calibrate and validate the N-Index for plasticmulched horticultural cropping systems of *** study found that the N-Index tool accurately identified and ranked the risk of N losses in the evaluated horticultural *** N-Index was calibrated for Florida's plastic-mulched horticultural cropping systems using a sensitivity *** adjusted N-Index was validated using compiled data of vegetables grown under plastic mulching systems during three consecutive *** from these studies suggest that the N-Index can be an easy-to-use tool capable of assessing nitrogen management practices for vegetable *** tool can be used to guide nutrient managers in the implementation of best nitrogen management practices that could contribute to reduced NO_(3)-N leaching losses from vegetable systems in Florida,contributing to a smaller environmental footprint and conservation of water quality.

关键词： Florida,nitrogen management Nitrate leaching Water leaching,vegetables,plastic mulch

Applications of Natural Radiation-Induced Paramagnetic Defects in Quartz to Exploration in sedimentary Basins

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Journal of China University of Geosciences 2006年第3期17卷 258-271页

作者：潘元明 Botis s Nokhrin s Department of Geological sciences University of Saskatchewan

Quartz grains in contact with uranium-bearing minerals or fluids are characterized by natural radiation-induced paramagnetic defects （e. g. , oxygen vacancy centers, silicon vacancy centers, and peroxy radicals）, which are amenable to study by electron paramagnetic resonance （EPR） spectroscopy. These natural radiation-induced paramagnetic defects, except for the oxygen vacancy centers, in quartz are concentrated in narrow bands penetrated by α particles：（1） in halos around U- and Th-bearing mineral inclusions and （2） in outer rims or along fractures. The second type of occurrence provides information about uranium mineralization or remobilization （i. e. , sources of uranium, timing of mineralization or remobilization, pathways of uranium-bearing fluids）. It can also be used to evaluate sedimentary basins for potential of uranium mineralization. In particular, the peroxy radicals are stable up to 800℃ and, therefore, are useful for evaluating metasedimentary rocks （e. g. , Paleoproterozoic metasedimentary sequences in the central zone of the North China craton）. EPR study of the Changcheng series can focus on quartz from the sediment-basement unconformity and faults to determine the presence and types of natural radiation-induced paramagnetic defects, with which to identify and prioritize uranium anomalies. Other potential applications of natural radiation-induced paramagnetic defects in quartz include uranium-bearing hydrocarbon deposits in sedimentary basins. For example, the Junggar, Ordos, and Tarim basins in northwestern China all contain important oil and natural gas fields and are well known for elevated uranium concentrations, including economic sandstone-hosted uranium deposits. Therefore, systematic studies on the distribution of natural radiation-induced paramagnetic defects in quartz from host sedimentary sequences are expected to provide information about the migration of oil and natural gas in those basins.

关键词： quartz natural radiation-induced paramagnetic defects EPR spectroscopy uranium deposits hydrocarbon resources Chinese sedimentary basins.

ligand density control boosts the efficiency of all-inorganic CsPbBr3 perovskite nanocrystal based light emitting diodes

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science Bulletin 2017年第5期62卷 314-315页

作者： Andrey l. Rogach Department of Physics and Materials science Centre for Functional Photonics (CFP) City University of Hong Kong Hong Kong China

lead halide perovskites attracted a lot of attention in the last several years,with a focus gradually shifting from the record power conversion efficiencies reported for photovoltaic devices based on thin perovskite f... 详细信息

关键词： lEDs ligand density control boosts the efficiency of all-inorganic Cs Pb Br3 perovskite nanocrystal based light emitting diodes Cs Pb Br

New Exact solutions of Fractional Zakharov–Kuznetsov and Modified Zakharov–Kuznetsov Equations Using Fractional sub-Equation Method

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Communications in Theoretical Physics 2015年第1期63卷 25-30页

作者： s.saha Ray s.sahoo Department of Mathematics National Institute of Technology Rourkela Orissa- 769008 India

In the present paper, we construct the analytical exact solutions of some nonlinear evolution equations in mathematical physics; namely the space-time fractional Zakharov–Kuznetsov(ZK) and modified Zakharov–Kuznetsov(m ZK) equations by using fractional sub-equation method. As a result, new types of exact analytical solutions are obtained. The obtained results are shown graphically. Here the fractional derivative is described in the Jumarie's modified Riemann–liouville sense.

关键词： fractional sub-equation method space-time fractional Zakharov-Kuznetsov (ZK) equation space-time fractional modified Zakharov-Kuznetsov (mZK) equation modified Riemann-liouvillederivative Mittag-leffler function