检索结果-南通市图书馆

A New Encryption Mechanism Supporting the Update of Encrypted Data for Secure and Efficient Collaboration in the Cloud Environment

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2025年第1期142卷 813-834页

作者： Chanhyeong cho Byeori Kim Haehyun cho taek-Young Youn Department of Cyber Security Dankook UniversityYongin16890Republic of Korea Department of Software Soongsil UniversitySeoul07027Republic of Korea

With the rise of remote collaboration,the demand for advanced storage and collaboration tools has rapidly ***,traditional collaboration tools primarily rely on access control,leaving data stored on cloud servers vulnerable due to insufficient *** paper introduces a novel mechanism that encrypts data in‘bundle’units,designed to meet the dual requirements of efficiency and security for frequently updated collaborative *** bundle includes updated information,allowing only the updated portions to be reencrypted when changes *** encryption method proposed in this paper addresses the inefficiencies of traditional encryption modes,such as Cipher Block Chaining(CBC)and Counter(CTR),which require decrypting and re-encrypting the entire dataset whenever updates *** proposed method leverages update-specific information embedded within data bundles and metadata that maps the relationship between these bundles and the plaintext *** utilizing this information,the method accurately identifies the modified portions and applies algorithms to selectively re-encrypt only those *** approach significantly enhances the efficiency of data updates while maintaining high performance,particularly in large-scale data *** validate this approach,we conducted experiments measuring execution time as both the size of the modified data and the total dataset size *** show that the proposed method significantly outperforms CBC and CTR modes in execution speed,with greater performance gains as data size ***,our security evaluation confirms that this method provides robust protection against both passive and active attacks.

关键词： Cloud collaboration mode of operation data update efficiency

Changes in spatial variations of sap flow in Korean pine trees due to environmental factors and their effects on estimates of stand transpiration

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Mountain Science 2016年第6期13卷 1024-1034页

作者： Minkyu moon taek-yu KIM Juhan PARK Sungsik cho Daun RYU Sanguk SUH Hyun Seok KIM National Center for Agro Meteorology 1 Gwanak-roGwanak-guSeou1151-744Republic of Korea National Institute of Environmental Research 42 Hwangyong-roSeo-guIncheon 404-780Republic of Korea Department of Forest Sciences Seoul National UniversityI Gwanak-roGwanak-guSeou1151-921Republic of Korea National Academy of Agricultural Science 166 Nongsaengmyeong-roWanju-gun 565-851Republic of Korea Research Institute for Agriculture and Life Sciences 1 Gwanak-roGwanak-guSeou1151-921Republic of Korea

It is difficult to scale up measurements of the sap flux density(J_S) for the characterization of tree or stand transpiration(E) due to spatial variations in J_S and their temporal *** assess spatial variations in the sap flux density of Korean pine(Pinus koraiensis) and their effects on E estimates,we measured the J_S using Granier-type *** trees,the J_S decreased exponentially with the radial depth,and the J_S of the east aspects were higher than those of the west *** trees,there was a positive relationship between J_S and the tree diameter at breast height,and this positive relationship became stronger as the transpiration demand *** spatial variations that caused large errors in E estimates(i.e.,up to 110.8 % when radial variation was ignored) had varied systematically with environmental factors systematic characteristics in relation to environmental ***,changes in these variations did not generate substantial errors in the E *** our study periods,the differences in the daily E(E_D) calculated by ignoring radial,azimuthal and tree-to-tree variations and the measured E_D were fairly constant,especially when the daily vapor pressure deficit(D_D)was higher than 0.6 k *** results imply that the effect of spatial variations changes on sap flow can be a minor source of error compared with spatial variations(radial,azimuthal and tree-to-tree variations) when considering E estimates.

关键词： Sap flow Environmental factors Pinuskoraiensis Scale-up Stand transpiration

Numerical Analysis of Secondary Cooling in Continuous Slab Casting

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2008年第3期24卷 389-390页

作者： Kee-Hyeon cho Byung-moon Kim Research Institute of Industrial Science & Technology GyeongBuk Regional Stragetic Agency for Innovation

In the present study, a numerical optimization program has been developed for predicting the optimal secondary cooling patterns in a continuous slab caster. Optimization strategy using Broydon-Fletcher-Goldfarb-Shanno （13FGS） method is carried out by determining the constant heat transfer coefficients in each spray zone, which could satisfy the casting conditions and metallurgical criteria specified by the engineer. From the present results, it is found that even a slight variation in the pouring temperature, allowable surface temperature, and casting speed could give rise to the changes in the cooling pattern throughout the spray zones.

关键词： Continuous casting Secondary cooling Optimization

Change in subfoveal choroidal thickness after argon laser panretinal photocoagulation

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2013年第4期6卷 505-509页

作者： Ga Eun cho Hee Yun cho Yun taek Kim Department of Ophthalmology Ewha Womans University School of Medicine Department of Ophthalmology Hanyang University School of Medicine

AIMTo evaluate changes in subfoveal choroidal thickness (SFCT) and macular thickness as measured by enhanced depth imaging spectral-domain optical coherence tomography (EDI-OCT) after argon laser panretinal photocoagu... 详细信息

关键词： choroidal thickness diabetic retinopathy EDI-OCT macular edema panretinal photocoagulation

Practical Privacy-Preserving ROI Encryption System for Surveillance Videos Supporting Selective Decryption

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第12期141卷 1911-1931页

作者： Chan Hyeong cho Hyun Min Song taek-Young Youn Department of Cyber Security Dankook UniversityYonginGyeonggi-Do16890Republic of Korea

With the advancement of video recording devices and network infrastructure,we use surveillance cameras to protect our valuable *** paper proposes a novel system for encrypting personal information within recorded surveillance videos to enhance efficiency and *** proposed method leverages Dlib’s CNN-based facial recognition technology to identify Regions of Interest(ROIs)within the video,linking these ROIs to generate unique *** IDs are then combined with a master key to create entity-specific keys,which are used to encrypt the ROIs within the *** system supports selective decryption,effectively protecting personal information using surveillance ***,the system overcomes the limitations of existing ROI recognition technologies by predicting unrecognized frames through *** research validates the proposed technology through experimental evaluations of execution time and post-processing techniques,ensuring comprehensive personal information *** for setting the thresholds used in this process are also *** the proposed method could serve as an effective solution to security vulnerabilities that traditional approaches fail to address.

关键词： Privacy de-identification selective decryption surveillance video

Influence of different nitrogen application on flour properties,gluten properties by HPLC and end-use quality of Korean wheat

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2018年第5期17卷 982-993页

作者： Seong-Woo cho chon-Sik Kang taek-Gyu Kang Kwang-Min cho Chul Soo Park Department of Crop Science and Biotechnology Chonbuk National University National Institute of Crop Science Rural Development Administration Research Center of Bioactive Materials Chonbuk National University

This study was performed to identify how the different levels of nitrogen application affected the variances of gluten properties and end-use qualities and the differences of variances among Korean wheat cultivars. Protein and dry gluten content, SDS sedimentation volume and water absorption of Mixolab increased as nitrogen application increased. This ratio of the increase was higher in Korean wheat cultivars for bread than in Korean wheat cultivars for noodles and cookies. The proportion of（α＋β）-gliadin measured by reversed-phase high-performance liquid chromatography（RP-HPLC） increased, but the proportion of ω-and γ-gliadin decreased as the protein content increased. The Korean wheat cultivars for bread showed a high proportion of（α＋β）-gliadin increase, the Korean cultivars for noodles had a high proportion of γ-gliadin decrease and the Korean wheat cultivars for cookies had a high proportion of ω-gliadin decrease. However, there was no variation of the component in the proportion of glutenin component measured by RP-HPLC, even though the protein content was increased, but all of the protein fractions measured by size exclusion（SE）-HPLC were increased. The soluble monomeric protein showed a high proportion of Korean wheat cultivars for bread by the increase of protein content. Bread loaf volume increased by the increase of protein content but there were no variances in the ratio of increase among Korean wheat cultivars. The cookie diameter decreased with the increase of protein content, and this ratio of decrease was the highest in Korean wheat cultivars for cookies. The hardness of cooked noodles also increased by the increase of protein content but there were no variations in springiness and cohesiveness. The decrease proportion of ω-gliadin affected the increase of bread loaf volume, the hardness of cooked noodles, and the decrease of cookie diameter.

关键词： wheat gluten end-use quality cultivar nitrogen application

Nitrile Electrolyte Strategy for 4.9 V-Class Lithium-Metal Batteries Operating in Flame

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2023年第3期6卷 229-237页

作者： Hyunseok moon Sung-Ju cho Dae-Eun Yu Sang-Young Lee Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoul 03722Korea Molecular Foundry Lawrence Berkeley National LaboratoryBerkeley CA USA Batteries R&D Center LG Energy SolutionDaejeon 34122Korea

Challenges facing high-voltage/high-capacity cathodes,in addition to the longstanding problems pertinent to lithium(Li)-metal anodes,should be addressed to develop high-energy-density Li-metal *** issue mostly stems from interfacial instability between electrodes and *** carbonate-or ether-based liquid electrolytes suffer from not only volatility and flammability but also limited electrochemical stability ***,we report a nitrile electrolyte strategy based on concentrated nitrile electrolytes(CNEs)with *** CNE consists of high-concentration lithium bis(fluorosulfonyl)imide(LiFSI)in a solvent mixture of succinonitrile(SN)/acetonitrile(AN).The SN/AN solvent mixture is designed to ensure high oxidation stability along with thermal stability,which are prerequisites for high-voltage Li-metal *** CNE exhibits interfacial stability with Li metals due to the coordinated solvation *** nitrate(LiNO_(3))and indium fluoride(InF_(3))are incorporated in the CNE as synergistic co-additives to further stabilize solid-electrolyte interphase(SEI)on Li *** resulting electrolyte(CNE+LiNO_(3)/InF_(3))enables stable cycling performance in Li||LiNi_(0.8)Co_(0.1)Mn_(0.1)and 4.9 V-class Li||LiNi_(0.5)Mn_(1.5)O_(4)***,the Li||LiNi_(0.5)Mn_(1.5)O_(4)cell maintains its electrochemical activity at high temperature(100℃)and even in flame without fire or explosion.

关键词： 4.9 V-class cathodes electrolyte-electrode interfaces lithium-metal batteries nitrile electrolytes safety

Evaluation of lubrication performance of crank pin bearing in a marine diesel engine

在线全文

学校读者我要写书评

暂无评论

Friction 2018年第4期6卷 464-471页

作者： Suk Man moon Yong Joo cho Tae Wan KIM School of Mechanical Engineering Pusan National University Department of Mechanical Engineering Pukyong National University

In this study, the lubrication performance of the crank pin bearing in a marine two–stroke diesel engine is evaluated to investigate the adhesional failure on the crank pin bearing. A numerical algorithm for the lubrication analysis considering motion analysis of the crank pin system is developed. The film pressure and thickness for three clearances and three lubricant temperatures are calculated. The results show that the lubricant temperature has a higher effect on film thickness than clearance. In terms of the film parameter, the operating condition that can result in solid–solid contact is investigated. We also suggest the desirable operating conditions of clearance and lubricant temperature to prevent the solid–solid contact.

关键词： crank pin bearing film thickness lubricant film parameter diesel engine

Suppression of DRR1 results in the accumulation of insoluble ubiquitinated proteins,which impairs drought stress tolerance

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2021年第3期63卷 431-437页

作者： Seong Gwan Yu Na Hyun cho Jong Hum Kim Tae Rin Oh Woo taek Kim Department of Systems Biology and Division of Life Science Yonsei UniversitySeoul 03722Korea Institute of Life Science and Biotechnology Yonsei UniversitySeoul 03722Korea

Drought stress has detrimental effects on *** the abscisic acid(ABA)-mediated drought response is well established,defensive mechanisms to cope with dehydration-induced proteotoxicity have been rarely ***1 was identified as an Arabidopsis drought-induced gene encoding an ER-localized RING-type E3 Ub *** of DRR1 markedly reduced tolerance to drought and proteotoxic stress without altering ABA-mediated germination and stomatal *** dehydration-induced insoluble ubiquitinated protein accumulation was more obvious in DRR1 loss-of-function plants than in wild-type *** results suggest that DRR1 is involved in an ABA-independent drought stress response possibly through the mitigation of dehydration-induced proteotoxic stress.

关键词： Arabidopsis drought stress E3 ligase proteotoxicity ubiquitination