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The learning curve for transurethral enucleation with bipolar energy for benign prostate hyperplasia:a single-surgeon experience of 494 patients

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Asian Journal of Andrology 2024年第3期26卷 288-294页

作者： Byeongdo Song Sang Hun Song seong jin Jeong Department of Urology Seoul National University Bundang HospitalSeongnam 13620Korea Department of Urology Seoul National University College of MedicineSeoul 03080Korea

This study was performed to investigate the learning curve of transurethral enucleation with bipolar energy(TUEB)for benignprostatic *** study involved 494 consecutive patients who underwent TUEB for benign prostatic hyperplasia fromAugust 2018 to March 2022 by one surgeon(SJJ,Seoul National University Bundang Hospital,seongnam,Korea).The patientswere followed up at 1 week,1 month,3 months,and 6 months *** evaluate the learning curve of TUEB,perioperativeparameters including the enucleation ratio(enucleated tissue weight/transitional zone volume),TUEB efficiency(enucleatedtissue weight/operation time),and enucleation efficiency(enucleated tissue weight/enucleation time)were *** and postoperative complications were also assessed,including the International Prostate Symptom Score(IPSS),IPSSquality-of-life(QoL)score,and uroflowmetry *** patients’median age was 72(interquartile range[IQR]:66–78)years,and the estimated prostate volume and transitional zone volume were 63.0(IQR:46.0–90.6)ml and 37.1(IQR:24.0–60.0)ml,*** enucleation ratio,TUEB efficiency,and enucleation efficiency were 0.60(IQR:0.46–0.54)g ml−1,0.33(IQR:0.22–0.46)g min−1,and 0.50(IQR:0.35–0.72)g min−1,respectively,plateauing after 70 *** functional outcomes,including total IPSS,IPSS QoL score,and uroflowmetry outcomes,significantly improved at 6 months after TUEB(all P<0.05),but without significant differences over the learning ***-five(13.2%)patients developed complications after TUEB,21.5%of whom experienced major complications(Clavien–Dindo grade≥3).The rate of major complications declined as the number ofTUEB cases increased(P=0.013).Our results suggest that the efficiency of TUEB stabilized within 70 procedures.

关键词： benign prostate hyperplasia learning curve perioperative efficiency prostate transurethral enucleation with bipolar energy

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Ultimate strength of single shear bolted connections with cold-formed ferritic stainless steel

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第2期14卷 120-136页

作者： jin-seong LIM Tae-soo KIM Seung-hun KIM Department of Architectural Engineering Hanbat National UniversityDaejeon 305-719Korea

This paper is focused on the structural behavior of the single shear bolted connections with thin-walled ferritic stainless *** purpose of this study is to investigate the ultimate behaviors,such as ultimate strength and fracture mode of the single shear bolted connections of thin-walled ferritic stainless steel(low cost steel) rather than austenitic stainless steel(high cost steel).Bolt arrangement and end distance parallel to the direction of applied load are considered as main variables of the test specimens for bolted *** have a constant dimension of edge distance perpendicular to the loading direction,bolt diameter,pitch,and gauge.A monotonic tensile test for specimens has been carried out and some bolted connections with long end distance showed curling(out of plane deformation) occurrence which led to strength *** ultimate behaviors such as fracture mode,ultimate strength are compared with those predicted by current design ***,conditions of curling occurrence and the strength reduction due to curling are investigated and modified strength equations are suggested considering the curling effect.

关键词： Cold-formed ferritic stainless steel Bolted connection Bolt arrangement End distance Curling Strength reduction

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Lightweight design of 45000r/min spindle using full factorial design and extreme vertices design methods

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Journal of Central South University 2011年第1期18卷 153-158页

作者： PARK seong-jin LEE Choon-man HWANG Young-kug Department of Mechanical Design and Manufacturing Engineering Changwon National University

Factors for determining the spindle size are the shaft diameter, positions of bearing and motor, and entire length of the spindle. Then, it is important to find the assembling of the optimal design variables, which satisfy the stiffimss and rotational speed required to the spindle. A general full factorial design method was used to verify some factors that affect the natural frequency of a spindle. It is verified that the shorter shaft length and bearing span length represent the higher natural frequency, and there are some effects according to the change in the levels of factors. The detailed spindle dimension is determined by applying an EVD method, which can define the optimal bearing position through considering the limiting condition. Based on the estimated regression model, the optimal spindle size and bearing distance that can improve the primary natural frequency are obtained, and the influence of design factors on the natural frequency is also analyzed.

关键词： high-speed spindle extreme vertices design natural frequency lightweight design full factorial design

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Atomic Diffusion in Cu/Si （111） and Cu/SiO2/Si （111） Systems by Neutral Cluster Beam Deposition

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Chinese Physics Letters 2008年第4期25卷 1400-1402页

作者：曹博李公平陈熙萌 CHO seong—jin KIM Hee School of Nuclear Science and Technology Lanzhou University Lanzhou 730000 Department of physics Kyungsung University Pusan 608-736 South Korea

The Cu films are deposited on two kinds of p-type Si （111） substrates by ionized duster beam （ICB） technique. The interface reaction and atomic diffusion of Cu/Si （111） and Cu/SiO2/Si （111） systems are studied at different annealing temperatures by x-ray diffraction （XRD） and Rutherford backscattering spectrometry （RBS）. Some significant results are obtained： For the Cu/Si （111） samples prepared by neutral dusters, the interdiffusion of Cu and Si atoms occurs when annealed at 230℃. The diffusion coefficients of the samples annealed at 230℃ and 500℃ are 8.5 ×10^-15 cm^2.s^-1 and 3.0 ×10^-14 cm^2.s^-1, respectively. The formation of the copper-silicide phase is observed by XRD, and its intensity becomes stronger with the increase of annealing temperature. For the Cu/SiO2//Si （111） samples prepared by neutral dusters, the interdiffusion of Cu and Si atoms occurs and copper silicides are formed when annealed at 450℃. The diffusion coefficients of Cu in Si are calculated to be 6.0 ×10^-16 cm^2.s^-1 at 450℃, due to the fact that the existence of the SiO2 layer suppresses the interdiffusion of Cu and Si.

关键词： supernova explosion proto-neutron star shock wave

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A Regional Economy's Resistance to the COVID-19 Shock: Sales Revenues of Micro-, Small-, and Medium-Sized Enterprises in South Korea

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International Journal of Disaster Risk Science 2022年第2期13卷 190-198页

作者： seong-jin Lee Joong-Hoo Park Seung-Min Cha Donghyun Kim Department of Public Policy and Management.Pusan National University Busan 46241South Korea Department of Urban Planning and Engineering Pusan National UniversityBusan 46241South Korea

The coronavirus disease 2019(COVID-19) is a global pandemic that has heavily impacted not only the health sector, but also the economic sector in *** countries have projected a negative economic impact, and the effect on micro-, small-, and medium-sized enterprises(MSMEs) is predicted to be significantly *** study estimated the regional resistance of MSME sales revenues and identified the regional economic factors that affect resistance by analyzing South Korea, a country with one of the lowest economic impact projections from COVID-19. Resistance was estimated by comparing sales revenues and changes in resistance observed during the early COVID-19 period to those recorded in the same weeks(weeks 6 to 9) of 2019. The factors that affect regional resistance were determined by conducting robust regression and spatial regression analyses. The results show that the number of confirmed COVID-19 cases, a direct risk factor, is negatively related to regional resilience, while diversity is positively related to regional resistance. To improve the regional resistance against uncertain events, this study recommends increased diversity among regional industrial structures to reduce the duration of the early shock of an unexpected adverse event.

关键词： COVID-19 Economic resistance MSMEs South Korea

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Atomic layer deposition for nanoscale oxide semiconductor thin film transistors:review and outlook

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International Journal of Extreme Manufacturing 2023年第1期5卷 153-180页

作者： Hye-Mi Kim Dong-Gyu Kim Yoon-Seo Kim Minseok Kim jin-seong Park Division of Materials Science and Engineering Hanyang University222 Wangsimni-roSeongdong-guSeoul 04763Republic of Korea

Since the first report of amorphous In–Ga–Zn–O based thin film transistors,interest in oxide semiconductors has *** offer high mobility,low off-current,low process temperature,and wide flexibility for compositions and ***,depositing oxide semiconductors using conventional processes like physical vapor deposition leads to problematic issues,especially for high-resolution displays and highly integrated memory *** approaches have limited process flexibility and poor conformality on structured *** layer deposition(ALD)is an advanced technique which can provide conformal,thickness-controlled,and high-quality thin film ***,studies on ALD based oxide semiconductors have dramatically increased *** so,the relationships between the film properties of ALD-oxide semiconductors and the main variables associated with deposition are still poorly understood,as are many issues related to *** this review,to introduce ALD-oxide semiconductors,we provide:(a)a brief summary of the history and importance of ALD-based oxide semiconductors in industry,(b)a discussion of the benefits of ALD for oxide semiconductor deposition(in-situ composition control in vertical distribution/vertical structure engineering/chemical reaction and film properties/insulator and interface engineering),and(c)an explanation of the challenging issues of scaling oxide semiconductors and ALD for industrial *** review provides valuable perspectives for researchers who have interest in semiconductor materials and electronic device applications,and the reasons ALD is important to applications of oxide semiconductors.

关键词： atomic layer deposition(ALD) oxide semiconductor thin film transistor(TFT)

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Multiplexed DNA-functionalized graphene sensor with artificial intelligence-based discrimination performance for analyzing chemical vapor compositions

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Microsystems & Nanoengineering 2023年第2期9卷 113-125页

作者： Yun Ji Hwang Heejin Yu Gilho Lee Iman Shackery jin seong Youngmo Jung Seung-Hyun Sung Jongeun Choi seong Chan Jun School of Mechanical Engineering Yonsei University500Yonsei-roSeodaemun-guSeoul 03722Republic of Korea

This study presents a new technology that can detect and discriminate individual chemical vapors to determine the chemical vapor composition of mixed chemical composition in situ based on a multiplexed DNA-functionalized graphene(MDFG)nanoelectrode without the need to condense the original vapor or target *** the best of our knowledge,our artificial intelligence(Al)-operated arrayed electrodes were capable of identifying the compositions of mixed chemical gases with a mixed ratio in the early *** innovative technology comprised an optimized combination of nanodeposited arrayed electrodes and artificial intelligence techniques with advanced sensing capabilities that could operate within biological limits,resulting in the verification of mixed vapor chemical *** selective sensors that are tolerant to high humidity levels provide a target for"breath chemovapor fingerprinting"for the early diagnosis of *** feature selection analysis achieved recognition rates of 99%and above under low-humidity conditions and 98%and above under humid conditions for mixed chemical *** 1D convolutional neural network analysis performed better,discriminating the compositional state of chemical vapor under low-and high-humidity conditions almost *** study provides a basis for the use of a multiplexed DNA-functionalized graphene gas sensor array and artificial intelligence-based discrimination of chemical vapor compositions in breath analysis applications.

关键词： humidity functional intelligence

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Diffusion and Interface Reaction of Cu/Si(100)Films Prepared by Cluster Beam Deposition

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Chinese Physics Letters 2011年第3期28卷 66-69页

作者： GAO Xing-Xin JIA Yan-Hui LI Gong-Ping CHO seong-jin KIM Hee School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000 Department of physics Kyungsung UniversityPusan 608-736South Korea

Cu thin films are deposited on Si(100)substrates by neutral cluster beams and ionized cluster *** atomic diffusion and interface reaction between the Cu films and the Si substrates of as-deposited and annealed at different temperatures(230℃,450℃,500℃and 600℃)are investigated by Rutherford backscatteringspectrometry(RBS)and x-ray diffraction(XRD).Some significant results are obtained on the following aspects:(1)For the Cu/Si(100)samples prepared by neutral cluster beams and ionized cluster beams at V_(a)=0 kV,atomic diffusion phenomena are observed clearly in the as-deposited *** the increase of annealing temperature,the interdiffusion becomes more ***,the diffusion intensities of the RBS spectra of the Cu/Si(100)films using neutral cluster beams are always higher than that of the Cu/Si(100)films using ionized cluster beams at V_(a)=OkV in the as-deposited and samples annealed at the same *** compound of Cu3Si is observed in the as-deposited samples.(2)For the Cu/Si(100)samples prepared by ionized cluster beams at V_(a)=1,3,5 kV,atomic diffusion phenomena are observed in the as-deposited samples at V_(a)=1,5 *** the samples prepared at V_(a)=3 kV,the interdiffusion phenomenon is observed until 500℃annealing *** reason for the difference is discussed.

关键词： temperature diffusion cluster

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Comparison of Viromes in Ticks from Different Domestic Animals in China

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Virologica Sinica 2020年第4期35卷 398-406页

作者： Tingting Zhao Haiyan Gong Xiaojuan Shen Wen Zhang Tongling Shan Xiangqian Yu seong jin Wang Li Cui Shanghai Key Laboratory of Veterinary Biotechnology School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China Shanghai Veterinary Research Institute Chinese Academy of Agricultural SciencesShanghai 200241China Shanghai Pudong New District Center for Animal Diseases Control and Prevention Shanghai 201299China School of Medicine Jiangsu UniversityZhenjiang 2012013China

Ticks are involved in the transmission of various arboviruses and some tick-borne viruses pose significant threats to the health of humans or *** study aimed to investigate the geographical distribution of tick species and tickassociated viruses in central and eastern *** 573 ticks from domestic animals including dogs,sheep and cattle were collected in *** genera of ticks were identified including Rhipicephalus and *** was performed on Miseq Illumina platform to characterize the tick viromes from the four different sampling *** trimming,13,640 reads were obtained and annotated to 19 virus *** these sequences,above 37.74%of the viral reads were related to the RNA *** comparison study revealed that the tick viral diversity was considerably different in the two identified tick *** viral diversity of *** was significantly different from that of other Rhipicephalus *** the other hand,substantial overlap in viral species was observed between the same *** addition,we found no evidence that the natural host played a major role in shaping virus diversity based on the comparison of their ***,the geographic location seems to significantly influence the viral *** study indicated that the novel negative-sense RNA viruses identified in this study was closely related to Bole tick virus 1 and 3 *** conclusion,the present study provides a baseline for comparing viruses detected in ticks,according to species,natural hosts,and geographic locations.

关键词： Ticks Viral metagenomics Virome

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Vitamin A supplementation downregulates ADH1C and ALDH1A1 mRNA expression in weaned beef calves

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Animal Nutrition 2022年第3期10卷 372-381页

作者： Xue Cheng jin Dong Qiao Peng seong jin Kim Na Yeon Kim Jalil Ghassemi Nejad Danil Kim Stephen B.Smith Hong Gu Lee Department of Animal Science and Technology Sanghvi College of Life SciencesKonkuk UniversitySeoul 05029Republic of Korea Asia Pacific Ruminant Institute Icheon 17385Republic of Korea Farm Animal Clinical Training and Research Center Institute of Green-Bio Science and TechnologySeoul National UniversityPyeongchang 25354Republic of Korea Department of Animal Science Texas A&M UniversityCollege StationTX 77843USA

Our previous studies demonstrated that oral vitamin A supplementation during late-stage pregnancy and the neonatal stage enhances birth weight,growth performance,and mRNA expression related to muscle and preadipocyte development in beef *** alcohol dehydrogenase 1C(ADH1C)c.-64T>C genotype also correlated with vitamin A concentration in beef *** study aimed to investigate the effects of vitamin A supplementation on the muscle development and vitamin A metabolism in weaned beef calves with different ADH1C *** male calves(90 d of age;initial BW:89.03 kg[SD 8.60])were stratified according to ADH1C genotype and vitamin A treatment(duration:3 months)and randomly assigned to 4 groups with a 22 factorial *** A treatments included the following:control(10,000 IU/kg of as-fed,*** type;*** type);treatment(40,000 IU/kg of as-fed,*** type;and *** type).Parameters including BW,FI,blood,longissimus dorsi muscle,and liver status during the experimental period were analyzed using the generalized linear model(GLM)procedure and Tukey's test by SAS 9.4 *** vitamin A was significantly increased(P<0.05)in the vitamin A treatment group at 4 and 6 months of *** type calves showed higher serum vitamin A concentration(P<0.05)than the TC type *** triglyceride and non-esterified fatty acid(NEFA)levels increased(P<0.05)in the treatment group compared with the control at 6 months of ***,BW,ADG and FI showed no differences between the *** addition,mRNA expression in longissimus dorsi muscle revealed upregulation of paired box 7(PAX7)(P<0.05)after the vitamin A treatment period based on biopsy *** ADH1C and aldehyde dehydrogenase(ALDH)1A1 mRNA expression was downregulated(P<0.01)by vitamin A *** TC type of ADH1C showed higher mRNA expression than the TT ***,no effect was observed on adipogenic mRNA expression(preadipocyte factor-1[PREF-1],peroxisome proliferator-activated rece

关键词： Vitamin A ADH1C genotype Muscle development Korean native calves

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