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Blockchain⁃Based Log Verification System for Cloud Forensics

Journal of Donghua University(English Edition) 2021年第5期38卷 449-458页

作者： AGBEDANU Promise Ricardo WANG Pengwei LEI Yinghui NORTEY Richard N RASOOL Abdul ODARTEY Lamptey K School of Computer Science and Technology Donghua UniversityShanghai 201620China

In this age when most organizations make use of cloud computing,it is important to not only protect cloud computing resources from cyber⁃attacks but also investigate these *** forensic investigations in a cloud environment,the investigators fall on service providers for pieces of evidence like log *** challenge,however,is the integrity of these logs provided by the service *** this end,we propose a blockchain⁃based log verification system called BlogVerifier that uses a decentralized approach to solve forensics issues in the *** extracts logs produced in cloud environments,hashes these logs and stores the hashed values as transactional values on the *** transactions are then merged into blocks and shared on the *** proposed system also ensures the continuation of an investigation even when the primary source of a log is compromised by using encryption and smart *** proposed system also makes it possible for any stakeholder involved in the forensic process to verify the authenticity of log *** performance results show that BlogVerifier can be integrated into the cloud environment without any significant impact on system resources and increase in computational cost.

关键词： cloud computing forensics blockchain cryptography security

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雌兔泌尿生殖系统动脉血管网模型的构建

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医用生物力学 2009年第3期24卷 228-232页

作者：陈春林黄睿李泽宇刘萍刘畅洪辉文吴坤成钟光明胡杰威李鉴轶欧阳振波唐雷钟世镇南方医科大学南方医院妇产科广州510515 南方医科大学临床解剖学研究所广州510515

目的探讨应用不同浓度灌注液、不同灌注通道构建雌兔泌尿生殖系统动脉血管网模型的方法,为数字化人体泌尿生殖系统动脉血管网模型的构建提供技术基础。方法配制浓度分别为20%、10%和8%的过氯乙烯灌注液,分别经腹主动脉(A组)和腹主动脉+... 详细信息

目的探讨应用不同浓度灌注液、不同灌注通道构建雌兔泌尿生殖系统动脉血管网模型的方法,为数字化人体泌尿生殖系统动脉血管网模型的构建提供技术基础。方法配制浓度分别为20%、10%和8%的过氯乙烯灌注液,分别经腹主动脉(A组)和腹主动脉+股动脉(B组)进行灌注,制成雌兔泌尿生殖系统动脉血管网铸型标本后,观察评估其血管的表达。结果以不同浓度灌注液及灌注通道构建的雌兔泌尿生殖系统动脉血管网模型,其动脉血管网的表现效果有明显差异:(1)高浓度(A、B)组显示的动脉分支有明显中断现象,填充剂分布不均匀,主要显示大的动脉主干,细小动脉分支难以显示;(2)中浓度(A、B)组能清晰显示动脉主干走行及分布,血管网较完整且显示清晰,分支无明显断裂现象,但B组血管网显示更饱满;(3)低浓度(A、B)组灌注后能清晰显示动脉主干走行,但末梢动脉血管网显示过密,部分呈聚集现象,分层显示不够清晰。结论采用10%浓度的过氯乙烯灌注液,分别经腹主动脉和股动脉同时灌注,能清晰显示完整饱满、分支无明显断裂的血管网。

关键词：雌兔泌尿生殖系统血管铸型过氯乙烯数字化

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Chromosome-scale genomes provide new insights into subspecies divergence and evolutionary characteristics of the giant panda

引用

Science Bulletin 2021年第19期66卷 2002-2013,M0004页

作者： Xuanmin Guang Tianming Lan Qiu-Hong Wan Yan Huang Hong Li Mingchun Zhang Rengui Li Zhizhong Zhang Yinghu Lei Ling Zhang Heming Zhang Desheng Li Xiaoping Li Haimeng Li Yan Xu Maiju Qiao Daifu Wu Keyi Tang Pengpeng Zhao Jian-Qing Lin Sunil KumarSahu Qiqi Liang Wenkai Jiang Danhui Zhang Xun Xu Xin Liu Michael Lisby Huanming Yang Karsten Kristiansen Huan Liu Sheng-Guo Fang MOE Key Laboratory of Biosystems Homeostasis&Protection State Conservation Centre for Gene Resources of Endangered WildlifeCollege of Life SciencesZhejiang UniversityHangzhou 310058China State Key Laboratory of Agricultural Genomics BGI-ShenzhenShenzhen 518083China Key Laboratory of State Forestry and Grassland Administration(State Park Administration)on Conservation Biology of Rare Animals in the Giant Panda National Park ChinaConservation and Research Center for the Giant PandaDujiangyan 611830China Novogene Bioinformatics Institute Beijing 100083China Qinling Research Center of Giant Panda Breeding Shaanxi Academy of ForestryXi’an 710082China China Wildlife Conservation Association Beijing 100714China Laboratory of Genomics and Molecular Biomedicine Department of BiologyUniversity of CopenhagenDK-2100 CopenhagenDenmark Guangdong Provincial Key Laboratory of Genome Read and Write BGI-ShenzhenShenzhen 518120China Guangdong Provincial Academician Workstation of BGI Synthetic Genomics BGI-ShenzhenShenzhen 518120China Qingdao-Europe Advanced Institute for Life Sciences Qingdao 266555China

Extant giant pandas are divided into Sichuan and Qinling *** giant panda has many speciesspecific characteristics,including comparatively small organs for body size,small genitalia of male individuals,and low ***,we report the most contiguous,high-quality chromosomelevel genomes of two extant giant panda subspecies to date,with the first genome assembly of the Qinling *** with the previously assembled giant panda genomes based on short reads,our two assembled genomes increased contiguity over 200-fold at the contig *** sequencing of 25 individuals dated the divergence of the Sichuan and Qinling subspecies into two distinct clusters from 10,000 to 12,000 years *** genomic analyses identified the loss of regulatory elements in the dachshund family transcription factor 2(DACH2)gene and specific changes in the synaptotagmin 6(SYT6)gene,which may be responsible for the reduced fertility of the giant *** selection analysis between the two subspecies indicated that the reproduction-associated IQ motif containing D(IQCD)gene may at least partly explain the different reproduction rates of the two ***,several genes in the Hippo pathway exhibited signs of rapid evolution with giant panda-specific variants and divergent regulatory elements,which may contribute to the reduced inner organ sizes of the giant panda.

关键词： Giant panda Chromosome-level genome Divergence time Reduced fertility Inner organ size

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