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Incidence and Clinical Characteristics of Deep Vein Thrombosis (DVT) after Total Knee Arthroplasty (TKA) with DVT Chemoprophylaxis

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World Journal of Cardiovascular Diseases 2014年第11期4卷 531-538页

作者： yong Sung Won Mihyeong kim Kang Woong Jun Woo Seok Nam Sanghyun Ahn Jeong-Kye Hwang Sang-Dong kim Sun-Cheol Park Sang Seob Yun Won-Chul Lee jang-Sang Park jang yong kim Division of Vascular Surgery Department of Surgery The Catholic University of Korea School of Medicine Seoul Korea Department of Preventive Medicine The Catholic University of Korea School of Medicine Seoul Korea

Objective: Deep vein thrombosis (DVT) after total knee arthroplasty (TKA) is very common and leading cause of death due to this procedure. The objective of this study was to investigate the incidence and clinical characteristics of DVT after TKA with DVT chemoprophylaxis. Methods: This is a prospective cohort study in single institution. The patients received postoperative DVT chemoprophylaxis (low molecular weight heparin (LMWH) or Fondaparinux), followed by duplex ultrasonography to check for DVT 1 - 2 weeks after TKA. The clinical characteristics were summarized and analysed by chi-square test and regression analysis. Results: Five hundred and thirty four patients were enrolled from January 2007 to December 2010. DVT chemoprophylaxis was administered in 524 (98.1%) of the 534 patients. DVT occurred in 9 subjects (1.69%);8 subjects had DVT in the leg, and 1 subject had a pulmonary embolism. Among them, asymptomatic DVT was observed in 5 patients (0.94%). Univariate analysis showed that surgical methods (revision, P = 0.0007), body mass index (BMI) (>25, P = 0.0028), low platelet count (less than 150 × 103, P = 0.0219), time in the intensive care unit (ICU) (P < 0.0001), no administration of prophylactic LMWH (P = 0.0392), and a history of DVT (P < 0.0001) were significant risk factors of DVT. Conclusions: The incidence of DVT was 1.69% after TKA with prophylactic antithrombotic therapy. Revision surgery, BMI, low platelet count, time in ICU, absence of prophylactic LMWH and history of DVT were significant risk factors of DVT.

关键词： Venous Thromboembolism Thromboprophylaxis Low Molecular Weight Heparin Anticoagulation Total Knee Arthroplasty

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Regulation of sleep by astrocytes in the hypothalamic ventrolateral preoptic nucleus

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Neural Regeneration Research 2025年第4期20卷 1098-1100页

作者： Jae-Hong kim Ruqayya Afridi Il-Sung jang Maan Gee Lee Kyoungho Suk Brain Korea 21 four KNU Convergence Educational Program of Biomedical Sciences for Creative Future Talents School of MedicineKyungpook National UniversityDaeguRepublic of Korea Department of Pharmacology School of MedicineKyungpook National UniversityDaeguRepublic of Korea Department of Pharmacology School of DentistryKyungpook National UniversityDaeguRepublic of Korea Brain Science&Engineering Institute Kyungpook National UniversityDaeguRepublic of Korea

Astrocytes are functionally dynamic cells that support neurons in multiple ways throughout an organism’s *** astrocytic regulation of neuronal activity has been increasingly recognized in recent *** are now recognized as playing a more complex role than mere bystanders in the central nervous ***,their role in regulating the sleep neurocircuitry is not well *** this perspective,we highlight the role of astrocytes in sleep modulation,with a particular focus on regulatory mechanisms related to the ventrolateral preoptic nucleus(VLPO)of the *** briefly discuss recent literature reporting the role of VLPO astrocytes in regulating sleep-associated behaviors.

关键词： sleep ventrolateral astrocytes

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Prominent cycling reversibility and kinetics enabled by CaTiO3 protective layer on Zn metal for aqueous Zn-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 245-258页

作者： Gaeun Lee yong Nam Ahn Seongjoon So Chanwoo Park Jong-Seong Bae Taehyun Park Il Tae kim Jaehyun Hur School of Chemical Biological and Battery Engineering Gachon University Seongnam Busan Center Korea Basic Science Institute

Aqueous Zn-ion batteries （AZIBs） have received considerable attention owing to their various advantages such as safety,low cost,simple battery assembly conditions,and high ionic ***,they still suffer from serious problems,including uncontrollable dendrite growth,corrosion,hydrogen evolution reaction （HER） from water decomposition,electrode passivation,and unexpected *** creation of a uniform artificial nanocrystal layer on the Zn anode surface is a promising strategy for resolving these ***,we propose the use of a perovskite CaTiO3（CTO） protective layer on Zn（CTO@Zn） as a promising approach for improving the performance of *** CTO artificial layer provides an efficient pathway for Zn ion diffusion towards the Zn metal because of the high dielectric constant （εr=180） and ferroelectric characteristics that enable the alignment of dipole moments and redistribute the Zn2+ions in the CTO *** avoiding the direct contact of the Zn anode with the electrolyte solution,the uneven dendrite growth,corrosion,parasitic side reactions,and HER are mitigated,while CTO retains its mechanical and chemical robustness during ***,CTO@Zn demonstrates an improved lifespan in a symmetric cell configuration compared with bare ***@Zn shows steady overpotential （～68 m V） for 1500 h at 1 mA cm-2/0.5 mA h cm-2,excelling bare ***,when paired with the V2O5-C cathode,the CTO@Zn//V2O5-C full battery delivers 148.4 mA h g-1（based on the mass of the cathode） after 300 *** study provides new insights into Zn metal anodes and the development of high-performance AZIBs.

关键词： Artificial layer Dielectric constant Zn metal anode Zinc aqueous battery

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Applications of numerical optimization techniques to design of axial compressor blades

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航空动力学报 2007年第4期22卷 645-652页

作者： Choon-Man jang Kwang-yong kim Fire and Engineering Services Research Department KICT Department of Mechanical Engineering Inha University

This paper describes the shape optimization of NASA rotor 37 and rotor and stator blades in a single-stage transonic axial *** optimization of the blades operating at the design flow condition has been performed using the response surface method and three-dimensional Navier-Stokes ***-layer approximation is introduced to the Navier-Stokes equations,and an explicit Runge-Kutta scheme is used to solve the governing *** three design variables,blade sweep,lean and skew,are introduced to optimize the three-dimensional stacking line of the *** objective function of the shape optimization is an adiabatic *** the optimization of rotor and stator blades, optimal blade shape can be *** is noted the increase of adiabatic efficiency by optimization of the blade shape with the stacking line in the single-stage transonic axial compressor is more effective in a rotor blade rather than a stator blade because of the large deformation of blade shape in the stator blade.

关键词：轴挤压叶片机航空推进系统最优化倾斜

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Solar-harvesting lead halide perovskite for artificial photosynthesis

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Journal of Energy Chemistry 2021年第11期30卷 11-26,I0001页

作者： Sunje Lee Gyu yong jang Jung Kyu kim Jong Hyeok Park Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Republic of Korea School of Chemical Engineering Sungkyunkwan University(SKKU)2066 Seobu‐roJangan‐guSuwon 16419Republic of Korea

Facing the upcoming energy and environmental crisis, artificial photosynthesis for producing various solar fuels (e.g., hydrogen or carbon products) via a solar-to-chemical energy conversion is receiving increasing attention;however, its low conversion efficiency is a challenge for commercialization. To resolve low-efficiency issues, lead halide perovskite (LHP) with outstanding optoelectronic properties compared to conventional semiconductors can be a promising approach to improve the solar-to-fuel conversion reactions and solar fuel production efficiency. The tunable energy band structure and charge transport properties of LHP have promoted their extensive use in the production of solar fuels. This study summarizes the recent advancements of LHP-mediated solar-to-fuel conversions, classified by their redox reactions, namely solar water splitting, hydrohalic acid splitting, and CO_(2) reduction. Advanced approaches for achieving high conversion efficiency and long-term durability are discussed, including the configuration of devices, the composition of LHP, and the protection strategy of LHP. Moreover, the reaction mechanisms of LHP-mediated solar-to-chemical energy conversions and obstacles for enhancing the conversion efficiency are discussed. Finally, we present the perspectives on the development of LHP-incorporated solar-to-fuel conversion systems, which might open a new era of energy harvesting and storage.

关键词： Perovskite Photocatalytic reaction Photoelectrochemistry Photovoltaic Water splitting HI splitting CO_(2)reduction

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End-of-life batteries management and material flow analysis in South Korea

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Frontiers of Environmental Science & Engineering 2018年第3期12卷 55-67页

作者： Hyunhee kim yong-Chul jang Yeonjung Hwang Youngjae Ko Hyunmyeong Yun Department of Environmental Engineering Chungnam National University Daejeon 34134 South Korea Waste to Energy Research Division Environmental Resources Research Department National Institute of Environmental Research Incheon 22689 South Korea Daejeon Green Environment Center Daejeon 34134 South Korea

Consumers increasingly have worn-out batteries as electrical and electronic equipment with new technical developments are introduced into the market and quickly replace older models. As a result, large amounts of end-of-life （EOL） or waste batteries are generated. Such batteries may contain a variety of materials that includes valuable resources as well as toxic elements. Thus, the proper recycling and management of batteries is very important from the perspective of resource conservation and environmental effect. The collection and recycling of EOL batteries is relatively low in South Korea compared to other countries, although an extended producer responsibility （EPR） policy was adopted for battery recycling in 2003. In this study, the management and material flow of EOL batteries is presented to determine potential problems and quantitative flow, based on literature review, site visits to battery recycling facilities, and interviews with experts in the Korea Battery Recycling Association （KBRA）, manufacturers, and regulators in government. The results show that approximately 558 tons of manganese-alkaline batteries, the largest fraction among recycling target items, was disposed in landfills or incinerators in 2015, while approximately 2,000 tons of batteries were recovered at a recycling facility by simple sorting and crushing processes. By raising environmental awareness, more diverse and effective collection systems could be established for consumers to easily dispose of EOL batteries in many places. Producers, retailers and distributors in South Korea should also play an important role in the collection of EOL batteries from consumers. Lithium-ion batteries from many electronic devices must be included in the EPR system for resource recovery.

关键词： End-of-life battery Recycling Material flow analysis (MFA)Extended producer responsibility (EPR)Resource recovery

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Voxel-based statistical analysis of regional cerebral glucose metabolism in children with attention-deficit hyperactivity disorder

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Neural Regeneration Research 2011年第36期6卷 2850-2855页

作者： Ji-Hoon kim Young-In Chung Jung Sub Lee In-Joo kim yong-Ki kim Seong-jang kim Division of Child-Adolescent Psychiatry Department of Psychiatry Pusan National University School of Medicine Yangsan-si Gyeongnam Republic of Korea Medical Research Institute Pusan National University School of Medicine Yangsan-si Gyeongnam Republic of Korea Department of Psychiatry Pusan National University School of Medicine Yangsan-si Gyeongnam Republic of Korea Department of Orthopedic Surgery Pusan National University School of Medicine Yangsan-si Gyeongnam Republic of Korea Department of Nuclear Medicine Pusan National University School of Medicine Yangsan-si Gyeongnam Republic of Korea

The technique of region of interest-based positron emission tomography is limited by its poor reli-ability and relatively few examined brain regions. In the present study, we compared brain metabo-lism assessed using fluorine-18-fluorodeoxyglucose positron emission tomography between 14 at-tention-deficit hyperactivity disorder （ADHD） patients and 15 normal controls with scoliosis at resting state by statistical parametric mapping. Glucose metabolism was decreased in the left parahippo-campal gyrus, left hippocampus, left anterior cingulate gyrus, right anterior and posterior lobes of the cerebellum, left superior temporal gyrus, left insula, left medial and middle frontal gyri, right medial frontal gyrus, and left basal ganglia （putamen, amygdala, and caudate nucleus） in children with ADHD. These data suggest that children with ADHD exhibit hypometabolism in various brain regions compared to controls, indicating that ADHD symptoms are unlikely the result of abnormalities in specific areas.

关键词： attention-deficit hyperactivity disorder positron emission tomography statistical parametric mapping

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Clinical features of second primary cancers arising in earlygastric cancer patients after endoscopic resection

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World Journal of Gastroenterology 2015年第27期21卷 8358-8365页

作者： Jung-Wook kim Jae-Young jang Young Woon Chang yong Ho kim Department of Internal Medicine College of Medicine Kyung Hee University Department of Surgery College of Medicine Kyung Hee University

AIM: To investigate the incidence and distribution of second primary cancers(SPCs) in early gastric cancer(EGC) patients who underwent endoscopic resection(ER), compared to advanced gastric cancer(AGC) patients who underwent ***: The medical records of 1021 gastric cancer(GC) patients were retrospectively reviewed from January 2006 to December 2010. The characteristics and incidence of SPCs were investigated in those with EGC that underwent curative ER(the EGC group) and those with AGC who underwent curative surgical resection(the AGC group).RESULTS: We ultimately enrolled 184 patients in the EGC group and 229 patients in the AGC group. A total of 38 of the 413(9.2%) GC patients had SPCs; the rate was identical in both groups. Of these 38 patients, 18 had synchronous and 20 had metachronous cancers. The most common SPC was lung cancer(18.4%), followed by colorectal cancer(13.2%) and esophageal cancer(13.2%). No significant risk factors were identified for the development of ***: Endoscopists should provide close surveillance and establish follow-up programs to ensure SPC detection in GC patients undergoing curativeresection regardless of their clinical characteristics.

关键词： Second primary cancers Early gastric cancer Endoscopic resection Advanced gastric cancer

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Overview of emerging catalytic materials for electrochemical green ammonia synthesis and process

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Carbon Energy 2023年第12期5卷 31-82页

作者： Venkata Thulasivarma Chebrolu Daehee jang Gokana Mohana Rani Chaeeun Lim Kijung yong Won Bae kim Department of Chemical Engineering Pohang University of Science and Technology(POSTECH)PohangGyeongbukSouth Korea Department of Biological Sciences and Bioengineering Inha UniversityIncheonRepublic of Korea

The concept of“green-ammonia-zero-carbon emission”is an emerging research topic in the global community and many countries driving toward decarbonizing a diversity of applications dependent on fossil *** light of this,electrochemical nitrogen reduction reaction(ENRR)received great attention at ambient *** low efficiency(%)and ammonia(NH_(3))production rates are two major challenges in making a sustainable ***,hydrogen evolution reaction is another crucial factor for realizing this NH_(3)synthesis to meet the large-scale commercial ***,the(i)importance of NH_(3)as an energy carrier for the next future,(ii)discussion with ENRR theory and the fundamental mechanism,(iii)device configuration and types of electrolytic systems for NH_(3)synthesis including key metrics,(iv)then moving into rising electrocatalysts for ENRR such as single-atom catalysts(SACs),MXenes,and metal–organic frameworks that were scientifically summarized,and(v)finally,the current technical contests and future perceptions are ***,this review aims to give insightful direction and a fresh motivation toward ENRR and the development of advanced electrocatalysts in terms of cost,efficiency,and technologically large scale for the synthesis of green NH_(3).

关键词： electrochemical ammonia synthesis hydrogen energy carrier metal-organic-frameworks MXenes single-atom-catalysts

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Graphene and MXene-based porous structures for multifunctional electromagnetic interference shielding

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Nano Research 2023年第1期16卷 1387-1413页

作者： Xi Shen jang-Kyo kim Department of Aeronautical and Aviation Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China School of Mechanical and Manufacturing Engineering University of New South WalesSydneyNSW 2052Australia The Research Institute for Sports Science and Technology The Hong Kong Polytechnic UniversityHung HomHong Kong 999077China

Electrically conductive porous structures are ideal candidates for lightweight and absorption-dominant electromagnetic interference(EMI)*** this review,we summarize the recent progress in developing porous composites and structures from emerging two-dimensional(2D)graphene and MXene nanosheets for EMI shielding *** properties contributing to various energy loss mechanisms are probed with a critical discussion on their correlations with EMI shielding *** approaches to constructing bulk porous structures,such as 2D porous films,three-dimensional(3D)aerogels and foams,and hydrogels,are compared to highlight important material and processing parameters required to achieve optimal microstructures.A comprehensive comparison of EMI shielding performance is also carried out to elucidate the effects of different assembly techniques and *** multifunctional applications in adaptive EMI shielding,mechanical force attenuation,thermal management,and wearable devices are introduced,underlining the importance of unique compositions and microstructures of porous *** process–structure–property relationships established in this review would offer valuable guidance and insights into the design of lightweight EMI shielding materials.

关键词： porous composite graphene MXene electrical conductivity electromagnetic interference(EMI)shielding

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