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Robot-assisted laparoscopic pyeloureterostomy for ureteropelvic junction rupture sustained in a traffic accident:A case report

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World Journal of Clinical Cases 2020年第22期8卷 5802-5808页

作者： Si Hyun kim woong bin kim Jae Heon kim Sang Wook Lee Department of Urology Soonchunhyang University Cheonan HospitalCheonan 31151South Korea Department of Urology Soonchunhyang University Bucheon HospitalBucheon 14584South Korea Department of Urology Soonchunhyang University Seoul HospitalSoonchunhyang University Medical CollegeSeoul 04401South Korea Department of Urology Soonchunhyang University Bucheon HospitalSoonchunhyang University School of MedicineBucheon 14584South Korea

BACKGROUND Ureteral reconstruction is a highly technical type of laparoscopic or open *** incidence of ureteral injury is low;however,ureteral injuries tend to be *** surgery for urinary reconstructive surgery is growing in popularity,which has made procedures such as pyeloplasty,ureteroureterostomy,and ureteroneocystostomy possible,with minimal damage to the *** the best of our knowledge,this is the first report of robot-assisted laparoscopic pyeloureterostomy in Korea,in a 17-year-old female patient with a ureteral *** SUMMARY The patient,a 17-year-old girl without previous medical history,was presented at the emergency room and complained of abdominal and back *** in the right upper quadrant was observed on physical *** in the right perirenal space was observed without abdominal organ injuries on the initial enhanced abdomen computed tomography(CT)*** injury was not suspected at this *** patient was stabilized via conservative treatment,but complained of right flank pain 3 wk later and revisited the emergency *** enhanced abdominal CT scan revealed a huge urinoma in the right perirenal space with hydronephrosis of the right *** and antegrade pyelography were *** and discontinuity of the ureter were found.A rupture of the ureteropelvic junction was diagnosed and reconstructive surgery was *** 3 mo,the patient did not complain of any symptoms without any abnormal radiologic *** This case report discusses the safety and effectiveness of this minimal invasive procedure as an alternative to conventional open or laparoscopic surgery.

关键词： Robot surgical procedure Ureteral injuries Minimal invasive surgical procedures Reconstructive surgical procedures Urology Case report

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Simultaneous robot-assisted approach in a super-elderly patient with urothelial carcinoma and synchronous contralateral renal cell carcinoma:A case report

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World Journal of Clinical Cases 2022年第20期10卷 7153-7162页

作者： Ji Kang Yun Si Hyun kim woong bin kim Hee Kyung kim Sang Wook Lee Department of Urology Soonchunhyang University Bucheon HospitalSoonchunhyang University College of MedicineBucheon 14584South Korea Department of Urology Soonchunhyang University Cheonan HospitalSoonchunhyang University College of MedicineCheonan 31151South Korea Department of Pathology Soonchunhyang University Bucheon HospitalSoonchunhyang University College of MedicineBucheon 14584South Korea

BACKGROUND It is rare for urothelial and renal cell carcinomas to coexist in the same patient,and even rarer for them to be detected *** of this rarity,a standard treatment has not been established and studies about overall survival are ***,physicians must modify treatments according to the individual’s situation and the stage of each *** recent years,with advances in the instruments and techniques,minimal invasive robotic surgeries have become available for advanced-stage or high-risk *** SUMMARY An 85-year-old woman with a medical history of hypertension and hyperlipidemia visited our *** had visited her local hospital complaining of intermittent,painless,gross hematuria that had started 3 mo *** computed tomography,a right renal mass and left proximal ureteral mass with hydronephrosis were found *** decided to perform robot-assisted surgery on both sides during one *** renal function and kidney loading,right partial nephrectomy was performed first,followed by left nephroureterectomy with bladder cuff *** the 6-mo follow-up,no specific symptoms were reported and dialysis was not *** were no unusual findings in the imaging study,and regular follow-up and imaging studies are *** This case report assessed the feasibility of simultaneous minimal invasive robotic surgery as an alternative to conventional open or laparoscopic surgery.

关键词： Robot surgical procedure Renal cell carcinoma Transitional cell carcinoma Minimally invasive surgical procedures Case report

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Revolutionizing Thermal Stability and Self‑Healing in Pressure Sensors:A Novel Approach

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Advanced Fiber Materials 2023年第6期5卷 2028-2039页

作者： Su bin Choi Jagan Singh Meena Jong‑woong kim Department of Smart Fab Technology Sungkyunkwan UniversitySuwon 16419Republic of Korea Research Center for Advanced Materials Technology Core Research InstituteSungkyunkwan UniversitySuwon 16419Republic of Korea School of Mechanical Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea

Soft electronics,which require mechanical elasticity,rely on elastic materials that have both a small Young’s modulus and a large elastic strain *** materials,however,are prone to damage when stress accumulates,presenting a significant challenge for soft *** address this issue,the integration of self-healing functionality into these materials appears to be a promising *** covalent bond chemistry has been utilized to design high-strength polymers with controllable ***,the temperature needed to trigger self-healing may induce thermal damage to other parts of the *** contrast,if the self-healing temperature is reduced,the device might suffer damage when exposed to temperatures exceeding the self-healing point due to the low stability of the polymer at high *** challenges highlight the need for materials that can self-heal at low temperatures while maintaining thermal stability at high *** response to this challenge,we propose a novel approach that involves forming a microfibrous network using polycaprolactone(PCL),a material with a low melting temperature of 60°C that is widely utilized in shape memory and self-healing *** fabricated the conductive fiber by encapsulating a microfiber PCL network with MXene *** MXene nanosheets were seamlessly coated on the PCL fiber’s surface to prevent shape deformation at high ***,they exhibited high thermal conductivity,facilitating rapid internal heat ***,the MXene/PCL microfiber networks demonstrated self-healing capabilities at 60°C and thermal stability above 200°*** makes them potentially suitable for stretchable,self-healing electronic devices that need to withstand high temperatures.

关键词： Fibers MXene Self-healing Pressure sensor Thermal stability Electrospinning

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Absolute dominance of hydrogenotrophic methanogens in full-scale anaerobic sewage sludge digesters

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Journal of Environmental Sciences 2013年第11期25卷 2272-2280页

作者： Jaai kim woong kim Changsoo Lee School of Urban and Environmental Engineering Ulsan National Institute of Science and Technology Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology

Anaerobic digestion （AD） is gaining increasing attention due to the ability to covert organic pollutants into energy-rich biogas and, accordingly, growing interest is paid to the microbial ecology of AD systems. Despite extensive efforts, AD microbial ecology is still limitedly understood, especially due to the lack of quantitative information on the structures and dynamics of AD microbial communities. Such knowledge gap is particularly pronounced in sewage sludge AD processes although treating sewage sludge is among the major practical applications of AD. Therefore, we examined the microbial communities in three full-scale sewage sludge digesters using qualitative and quantitative molecular techniques in combination： denaturing gradient gel electrophoresis （DGGE） and real-time polymerase chain reaction （PCR）. Eight out of eleven bacterial sequences retrieved from the DGGE analysis were not affiliated to any known species while all eleven archaeal sequences were assigned to known methanogen species. Quantitative real-time PCR analysis revealed that, based on the 16S rRNA gene abundance, the hydrogenotrophic order Methanomicrobiales is the most dominant methanogen group （〉 94% of the total methanogen population） in all digesters. This corresponds well to the prevailing occurrence of the DGGE bands related to Methanolinea and Methanospirillum, both belonging to the order Methanomicrobiales, in all sludge samples. It is therefore suggested that hydrogenotrophic methanogens, especially Methanomicrobiales strains, are likely the major players responsible for biogas production in the digesters studied. Our observation is contrary to the conventional understanding that aceticlastic methanogens generally dominate methanogen communities in stable AD environments, suggesting the need for further studies on the dominance relationship in various AD systems.

关键词： anaerobic digestion hydrogenotrophic methanogens methanomicrobiales microbial community structure sewage sludge

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High-frequency supercapacitors with phosphorus-doped Ketjen black

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Journal of Energy Chemistry 2023年第7期82卷 464-474,I0010页

作者： Qing Jin Mahima Khandelwal woong kim Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea

Compact supercapacitors(SCs)have attracted attention for their great potential to replace bulky aluminum electrolytic capacitors(AECs)in alternating current(AC)line filtering ***,the fabrication of a high-frequency SC is reported using Ketjen black(KB)nanoparticles doped with phosphorus(P)to achieve a high areal capacitance of up to 2.26 mF cm^(-2)along with a high-rate capability,with a phase angle of-80.2°at 120 *** high performance of the phosphorus-doped KB(designated PKB)SC with a 6 M KOH aqueous electrolyte is associated with its increased surface wettability and additional capacitive sites provided by the *** functional theory(DFT)calculations further indicate that the P-doping enhances the interactions between the electrolyte ions and the carbon surface,thus leading to an improved electrochemical *** results suggest that the P-doped carbonbased SC could be highly favored in replacing conventional AECs in various high-frequency electronic devices.

关键词： Phosphorus doping Frequency response Wettability Supercapacitor AC line filtering DFT calculation

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Biogeochemical cyclic activity of bacterial arsB in arsenic-contaminated mines

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Journal of Environmental Sciences 2008年第11期20卷 1348-1355页

作者： CHANG Jin-Soo kim Kyoung-woong Department of Environment Science and Engineering Gwangju Institute of Science and Technology (GIST)261 Cheomdan-gwagiroBuk-guGwangjuRepublic of Korea.

Biogeochemical cyclic activity of the ars (arsenic resistance system) operon is arsB influx/effux encoded by the ecological of Pseudomonas *** suggests that studying arsenite-oxidizing bacteria may lead to a better understanding of molecular geomicrobiology,which can be applied to the bioremediation of arsenic-contaminated *** is the first report in which multiple arsB-binding mechanisms have been used on indigenous *** ArsB (strains OS-5; ABB83931; OS-19; ABB04282 and RW-28; ABB88574...

关键词： arsenic resistance bacteria arsB influx/efflux pump arsenic resistance system (ars) biogeochemical

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Boosted Lithium-Ion Transport Kinetics in n-Type Siloxene Anodes Enabled by Selective Nucleophilic Substitution of Phosphorus

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Nano-Micro Letters 2024年第10期16卷 618-637页

作者： Se In kim woong-Ju kim Jin Gu Kang Dong-Wan kim School of Civil Environmental and Architectural EngineeringKorea University02841 SeoulSouth Korea Nanophotonics Research Center Korea Institute of Science and Technology02792 SeoulSouth Korea

Doped two-dimensional(2D)materials hold significant promise for advancing many technologies,such as microelectronics,optoelectronics,and energy ***,n-type 2D oxidized Si nanosheets,namely n-type siloxene(n-SX),are employed as Li-ion battery *** thermal evaporation of sodium hypophosphite at 275℃,P atoms are effectively incorporated into siloxene(SX)without compromising its 2D layered morphology and unique Kautsky-type crystal ***,selective nucleophilic substitution occurs,with only Si atoms being replaced by P atoms in the O_(3)≡Si-H *** resulting n-SX possesses two delocalized electrons arising from the presence of two electron donor types:(i)P atoms residing in Si sites and(ii)H *** doping concentrations are varied by controlling the amount of precursors or their mean free *** at 2000 mA g^(-1),the n-SX electrode with the optimized doping concentration(6.7×10^(19) atoms cm^(-3))delivers a capacity of 594 mAh g^(-1) with a 73%capacity retention after 500 *** improvements originate from the enhanced kinetics of charge transport processes,including electronic conduction,charge transfer,and solid-state *** approach proposed herein offers an unprecedented route for engineering SX anodes to boost Li-ion storage.

关键词： Li-ion battery Two-dimensional N-type siloxene Doping mechanism Kinetics

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Comparative toxicity of silver nanoparticles and silver ions to Escherichia coli

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Journal of Environmental Sciences 2018年第4期30卷 50-60页

作者： Yoojin Choi Hyun-A kim Kyoung-woong kim Byung-Tae Lee Department of Chemical and Biomolecular Engineering (BK21 Plus Program) Korea Advanced Institute of Science and Technology (KAIST) School of Earth Sciences and Environmental Engineering Gwangju Institute of Science and Technology (GIST)

With the increase in silver（Ag）-based products in our lives, it is essential to test the potential toxicity of silver nanoparticles（Ag NPs） and silver ions（Ag ions） on living organisms under various conditions. Here, we investigated the toxicity of Ag NPs with Ag ions to Escherichia coli K-12 strain under various conditions. We observed that both Ag NPs and Ag ions display antibacterial activities, and that Ag ions had higher toxicity to E. coli K-12 strain than Ag NPs under the same concentrations. To understand the toxicity of Ag NPs at a cellular level, reactive oxygen species（ROS） enzymes were detected for use as antioxidant enzymatic biomarkers. We have also studied the toxicity of Ag NPs and Ag ions under various coexistence conditions including： fixed total concentration, with a varied the ratio of Ag NPs to Ag ions; fixed the Ag NPs concentration and then increased the Ag ions concentration; fixed Ag ions concentration and then increasing the Ag NPs *** to Ag NPs and Ag ions clearly had synergistic toxicity; however, decreased toxicity（for a fixed Ag NPs concentration of 5 mg/L, after increasing the Ag ions concentration） to E. coli K-12 strain. Ag NPs and Ag ions in the presence of L-cysteine accelerated the bacterial cell growth rate, thereby reducing the bioavailability of Ag ions released from Ag NPs under the single and coexistence conditions. Further works are needed to consider this potential for Ag NPs and Ag ions toxicity across a range of environmental *** Significance Statement： As silver nanoparticles（Ag NPs）-based products are being broadly used in commercial industries, an ecotoxicological understanding of the Ag NPs being released into the environment should be further considered. Here, we investigate the comparative toxicity of Ag NPs and silver ions（Ag ions） to Escherichia coli K-12 strain, a representative ecotoxicological bioreporter. This study showed that toxicities of Ag NPs and Ag ions to E. coli

关键词： Nanotoxicity Silver nanoparticles Silver ions Coexist condition Escherichia coli

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The validity of the Reynolds equation in spool valve analysis considering cavitation

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Friction 2016年第3期4卷 266-276页

作者： Sung-Ho HONG Kyung-woong kim School of Mechanical Aerospace & Systems Engineering Korea Advanced Institute of Science and Technology 291 Daehak-ro Yuseong-guDaejeon 305-701 Republic of Korea

The purpose of this research is to investigate the validity of the Reynolds equation in spool valve analysis under cavitation. This study is carried out for a laminar and isothermal flow between a sleeve and spool with grooves. The pressure and lateral force obtained from the Reynolds equation and the Navier-Stokes equation are compared with variations of aspect ratio, cross sectional area, and number of grooves. The cavitation phenomenon is considered by using a cavitation model in the Navier-Stokes equation and the Reynolds cavitation boundary condition in the Reynolds equation. A large difference of more than 20% is found between the equations for a lateral force of spool valve with many grooves. It was found that the Reynolds equation is not suitable for calculation of a lateral force of the spool valve with multiple-grooves of which the width and depth are even larger than the clearance under cavitation.

关键词： validity Reynolds equation Navier-Stokes equation spool valve cavitation

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Modified analogue forecasting in the hidden Markov frameworkfor meteorological droughts

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Science China(Technological Sciences) 2019年第1期62卷 151-162页

作者： CHEN Si CHUNG GunHui kim Byung Sik kim Tae-woong Department of Civil and Environmental Engineering Hanyang University Department of Civil Engineering Hoseo University Department of Urban Environmental Disaster Prevention Engineering Kangwon National University

An analogue method(AM) is a nonparametric approach that has been applied to predict the future states of a dynamic system by following the evolution of the analogues in the historical archive. In this study, we proposed a hidden Markov model(HMM)framework for a modified analogue forecasting(MAF) approach for meteorological droughts in Korea. The unobservable(hidden) state process in the framework aims to model the underlying drought state, while the observation process was formed from the time series of the standardized precipitation index(SPI) as a drought index. Within the framework, the likelihood estimator was used as the measure of similarity between past SPI analogues and current data. The MAF approach was conducted on the selected analogues to make forecasts at lead times of one and three months. The proposed model was applied to five selected stations in Korea using the SPI data from 1973 to 2016. The forecasting performance of the proposed model was tested during the validation period(2003–2016) using several statistical criteria and it was compared to a persistence-based benchmark model. The results showed significant improvement in the forecasting capacity, and satisfactory performance for numerical SPI forecasting and categorical drought forecasting. The results also suggested that the proposed model was able to provide useful information for determining future drought categories for early drought warning with a lead time of up to three months.

关键词： modified analogue forecasting hidden Markov model meteorological drought standardized precipitation index

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