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Asian Journal of Andrology 2005年第2期7卷 189-194,页

作者： M.K.chung s.J.Lee Y.B.Kim s.c.park D.H.shin s.H.Kim J.c.Kim Reproductive Toxicology Division Korea Institute of ToxicologyKorea Research Institute of Chemical TechnologyDaejeon 305-600Korea college of Veterinary Medicine Chungbuk National UniversityCheongju 361-763Korea college of Veterinary Medicine Kyungpook National UniversityDaegu 702-701Korea college of Veterinary Medicine Chonnam National UniversityGwangju 500-757Korea

Aim:To determine whether in utero and neonatal exposure to a 60 Hz extremely low frequency electromagnetic field (EMF) results in spermatotoxicity and reproductive dysfunction in the F1 offspring of ***:Age-matched, pregnant sprague-Dawley rats were exposed continuously (21 h/day) to a 60 Hz EMF at field strengths of 0 (sham control),5,83.3 or 500 μT from day 6 of gestation through to day 21 of *** experimentally generated magnetic field was monitored continuously (uninterrupted monitoring over the period of the study) throughout the ***:No exposure-related changes were found in exposed or sham-exposed animals with respect to the anogenital distance,preputial separation,testis weight,testicular histology,sperm count,daily sperm production, sperm motility,sperm morphology and reproductive capacity of F1 ***:Exposure of sprague- Dawley rats to a 60 Hz EMF at field strengths of up to 500 μT from day 6 of gestation to day 21 of lactation did not produce any detectable alterations in offspring spermatogenesis and fertility.

关键词： spermatogenesis electromagnetic fields prenatal exposure postnatal exposure rat

Flatness improvement of anode supported electrolytes for planar sOFcs via tape casting and co-firing

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Flatness improvement of anode supported electrolytes for pla...

Zymomonas mobilis用甜菜底物生产酒精的比较

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作者： H.G.park s.c.park J.J.Lee s.H.Hyun D.H.Kim Yonsei Univ.

＜正＞In recent,sOFcs have attracted much attention because of their low emissions,high energy conversion efficiency,and flexibility for various ***,one of the key problems of applying fiat type sOFcs in large scale power generation is that the large area unit cells with the high degree of flatness can not be satisfactorily *** this work,

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生物技术 1992年第5期2卷 47-48页

作者： s.c.park 彭万林姜秀兰

利用在葡萄糖基质培养基上培养***菌生产酒精比酵母有几个优点.其中最重要的是较高酒精收率(超过理论值95%)和较高酒精产率(高出3—5倍).关于用***在蔗糖基质培养基上进行酒精发酵有两个主要问题.首先,由于果聚精和山梨糖醇付产物的形成... 详细信息

利用在葡萄糖基质培养基上培养***菌生产酒精比酵母有几个优点.其中最重要的是较高酒精收率(超过理论值95%)和较高酒精产率(高出3—5倍).关于用***在蔗糖基质培养基上进行酒精发酵有两个主要问题.首先,由于果聚精和山梨糖醇付产物的形成,酒精收率减小到理论值的70—80%.其次,在象甘蔗糖蜜这样天然底物中Zmobilis的生长和酒精产量都很低.

关键词：运动发酵菌单孢菌酒精发酵

Omni-functional simultaneous interfacial treatment for enhancing stability and outgassing suppression of lithium-ion batteries

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Journal of Energy chemistry 2024年第7期94卷 677-687页

作者： Youbean Lee chanjoo park Kyoungmin Min Kwangjin park Department of Mechanical Engineering Gachon UniversityGyeonggi-do 13120Republic of Korea Department of Battery Engineering Gachon UniversityGyeonggi-do 13120Republic of Korea school of Mechanical Engineering Soongsil UniversitySeoul 06978Republic of Korea

Ni-rich layered oxides in lithium-ion batteries have problems with gas generation and electrochemical performance reduction due to residual lithium's reaction on the surface with the *** address this issue,in this study,the Acid solvent evaporation(AsE)method has been proposed as a potential method to remove residual lithium while promoting the formation of a new LiNO_(3)-derived coating layer on the cathode *** reduction of residual lithium using the AsE method and the construction of a LiNO_(3)-derived coating layer suppresses gas evolution caused by the side effects of the electrolyte,improves electrochemical performance,and improves thermal stability by facilitating the smooth movement of lithium ***,the structural stability and resistance change due to the LiNO_(3)-derived coating layer effects is guaranteed through cycling and DcIR of the pouch *** a result,compared to Pristine,the capacity retention of coin cells increased by 8%after 100 cycles,and pouch cells increased by 25%after 160 *** addition,after cycling the pouch cell,cO_(2) gas has significantly reduced by about 30%compared to Pristine using gas *** AsE method effectively forms a robust LiNO_(3)-derived coating layer on the cathode active material,which helps minimize electrolyte reactivity,suppress ,cO_(2) emissions,enhance surface structure stability,improve thermal stability,and improveoverallbatteryperformance.

关键词： Lithium-ion batteries Ni-rich NcM Acid solvent evaporation LiNO_(3)-derived coating Gasevolution

Non-interleaved chiral metasurfaces and neural networks enhance the spatial resolution of polarimetry

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Light(science & Applications) 2024年第3期13卷 396-398页

作者： Jaewon Jang Minsu park Yeonsang park Department of Physics Chungnam National UniversityDaejeon 34134Korea Institute of Quantum systems Chungnam National UniversityDaejeon 34134Korea

Non-interleaved chiral metasurfaces for high-spatial-resolution polarimetry are proposed and ***,a convolutional neural network is incorporated to analyze interferometric images with the polarization state of light,an... 详细信息

关键词： parameters chiral resolution

Efficient Object segmentation and Recognition Using Multi-Layer Perceptron Networks

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computers, Materials & continua 2024年第1期78卷 1381-1398页

作者： Aysha Naseer Nouf Abdullah Almujally saud s.Alotaibi Abdulwahab Alazeb Jeongmin park Department of computer science Air UniversityIslamabad44000Pakistan Department of Information systems College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Information system Department Umm Al-Qura UniversityMakkahSaudi Arabia Department of computer science College of Computer Science and Information SystemNajran UniversityNajran55461Saudi Arabia Department of computer Engineering Tech University of KoreaGyeonggi-do15073South Korea

Object segmentation and recognition is an imperative area of computer vision andmachine learning that identifies and separates individual objects within an image or video and determines classes or categories based on their *** proposed system presents a distinctive approach to object segmentation and recognition using Artificial Neural Networks(ANNs).The system takes RGB images as input and uses a k-means clustering-based segmentation technique to fragment the intended parts of the images into different regions and label thembased on their ***,two distinct kinds of features are obtained from the segmented images to help identify the objects of *** Artificial Neural Network(ANN)is then used to recognize the objects based on their *** were carried out with three standard datasets,MsRc,Ms cOcO,and caltech 101 which are extensively used in object recognition research,to measure the productivity of the suggested *** findings from the experiment support the suggested system’s validity,as it achieved class recognition accuracies of 89%,83%,and 90.30% on the MsRc,Ms cOcO,and caltech 101 datasets,respectively.

关键词： K-region fusion segmentation recognition feature extraction artificial neural network computer vision

Iso-propagation vortices:a breakthrough in optical communication technology

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Advanced Photonics 2024年第3期6卷 13-15页

作者： cherry park Junsuk Rho Pohang University of science and Technology(POsTEcH) Department of Mechanical EngineeringPohangRepublic of Korea Pohang University of science and Technology(POsTEcH) Department of Chemical EngineeringPohangRepublic of Korea Pohang University of science and Technology(POsTEcH) Department of Electrical EngineeringPohangRepublic of Korea POscO-POsTEcH-RIsT convergence Research center for Flat Optics and Metaphotonics PohangRepublic of Korea

The rapid advance of optical communication technology requires improvements in data transmission capacity and *** methods of increasing the transmission capacity such as polarization,wavelength,and spatial mode division multiplexing have shown significant promise,while spatial mode division multiplexing(sDM)offers a new approach through the use of orthogonal spatial modes as distinct communication channels.

关键词： communication optical polarization

Electrochemically Deposited cZTsse Thin Films for Monolithic Perovskite Tandem solar cells with Efficiencies Over 17%

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Energy & Environmental Materials 2024年第1期7卷 147-152页

作者： sun Kyung Hwang Ik Jae park se Won seo Jae Hyun park so Jeong park Jin Young Kim Department of Materials science and Engineering Seoul National UniversitySeoul 08826Korea Department of Applied Physics Sookmyung Women's UniversitySeoul 04310Korea Research Institute of Advanced Materials and systems Sookmyung Women's UniversitySeoul 04310Korea Research Institute of Advanced Materials(RIAM) Seoul National UniversitySeoul 08826Korea

In spite of the high potential economic feasibility of the tandem solar cells consisting of the halide perovskite and the kesterite cu2Znsn(s,se)4(cZTsse),they have rarely been demonstrated due to the difficulty in implementing solution-processed perovskite top cell on the rough surface of the bottom ***,we firstly demonstrate an efficient monolithic two-terminal perovskite/cZTsse tandem solar cell by significantly reducing the surface roughness of the electrochemically deposited cZTsse bottom *** surface roughness(R_(rms))of the cZTsse thin film could be reduced from 424 to 86 nm by using the potentiostatic mode rather than using the conventional galvanostatic mode,which can be further reduced to 22 nm after the subsequent ion-milling *** perovskite top cell with a bandgap of 1.65 eV could be prepared using a solution process on the flattened cZTsse bottom cell,resulting in the efficient perovskite/cZTsse tandem solar *** the current matching between two subcells involving the thickness control of the perovskite layer,the best performing tandem device exhibited a high conversion efficiency of 17.5%without the hysteresis effect.

关键词： cZTsse monolithic tandem solar cells perovskite solution process surface roughness control

An Investigation on Open-RAN specifications:Use cases,security Threats,Requirements,Discussions

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computer Modeling in Engineering & sciences 2024年第10期141卷 13-41页

作者： Heejae park Tri-HaiNguyen Laihyuk park Department of computer science and Engineering Seoul National University of Science and TechnologySeoul01811Republic of Korea Faculty of Information Technology School of TechnologyVan Lang UniversityHo Chi Minh City70000Vietnam

The emergence of various technologies such as terahertz communications,Reconfigurable Intelligent surfaces(RIs),and AI-powered communication services will burden network operators with rising infrastructure ***,the Open Radio Access Network(O-RAN)has been introduced as a solution for growing financial and operational burdens in Beyond 5G(B5G)and 6G networks.O-RAN promotes openness and intelligence to overcome the limitations of traditional *** disaggregating conventional Base Band Units(BBUs)into O-RAN Distributed Units(O-DU)and O-RAN centralized Units(O-cU),O-RAN offers greater flexibility for upgrades and network ***,this openness introduces new security challenges compared to traditional *** existing studies overlook these security requirements of the O-RAN *** gain deeper insights into the O-RAN system and security,this paper first provides an overview of the general O-RAN architecture and its diverse use cases relevant to B5G and 6G *** then delve into specifications of O-RAN security threats and requirements,aiming to mitigate security vulnerabilities *** providing a comprehensive understanding of O-RAN architecture,use cases,and security considerations,thisworkserves as a valuable resource for future research in O-RAN and its security.

关键词： O-RAN architecture use cases security issues security requirements security discussions

Environmentally adaptive reshaping of plant photomorphogenesis by karrikin and strigolactone signaling

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Journal of Integrative Plant Biology 2024年第5期66卷 865-882页

作者： Young-Joon park Bo Eun Nam chung-Mo park Department of smart Farm science Kyung Hee UniversityYongin 17104Korea Departmentof Biological sciences Seoul National UniversitySeoul 08826Korea Department of chemistry Seoul National UniversitySeoul 08826Korea

coordinated morphogenic adaptation of growing plants is critical for their survival and propagation under fluctuating *** morphogenic responses to light and warm temperatures,termed photomorphogenesis and thermomorphogenesis,respectively,have been extensively studied in recent *** photomorphogenesis,plants actively reshape their growth and developmental patterns to cope with changes in light ***,photomorphogenesis is closely associated with diverse growth hormonal ***,accumulating evidence indicates that light-directed morphogenesis is profoundly affected by two recently identified phytochemicals,karrikins(KARs)and strigolactones(sLs).KARs and sLs are structurally related butenolides acting as signaling molecules during a variety of developmental steps,including seed *** receptors and signaling mediators have been identified,and associated working mechanisms have been explored using gene-deficient mutants in various plant *** particular interest is that the KAR and sL signaling pathways play important roles in environmental responses,among which their linkages with photomorphogenesis are most comprehensively studied during seedling *** this review,we focus on how the phytochemical and light signals converge on the optimization of morphogenic *** also discuss molecular mechanisms underlying the signaling crosstalks with an aim of developing potential ways to improve crop productivity under climate changes.

关键词： karrikins morphogenic adaptation photomorphogenesis seedling establishment strigolactones