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A renormalization group approach to crowd psychology and inter-group coupling in social many-body systems

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Science Bulletin 2012年第Z1期 249-254页

关键词： renormalization crowd psychology block spin

Delphi study for developing a checklist of adverse events associated with acupotomy

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Journal of Integrative Medicine 2024年第5期 579-587页

作者： Hyungsun Jun Haebeom Lee Sang-hoon Yoon Chan-Young Kwon Damin Jeon Jun-Hwan Lee Jungtae Leem Department of Diagnostics College of Korean Medicine Wonkwang University 7Days Inc. chung-Yeon Korean Medicine Clinic Department of Oriental Neuropsychiatry Dong-Eui University College of Korean Medicine Chonnam National University Hwasun Hospital KM Science Research Division Korea Institute of Oriental Medicine Department of Korean Convergence Medical Science KIOM School University of Science & Technology (UST) Department of Physical Medicine and Rehabilitation Spaulding Rehabilitation Hospital Harvard Medical School Research Center of Traditional Korean Medicine College of Korean Medicine Wonkwang University

Background: Acupotomy, a more invasive procedure than acupuncture, involves the use of a thicker needle with an integrated knife at the tip, necessitating safety research. We aimed to define relevant adverse events(AEs) and create a standardized form of the ACUPOtomy-related AEs CHECKlist(ACUPOCHECK).Methods: Before conducting the Delphi process, a systematic review and pilot prospective study were conducted to gather information on previously reported AEs. Using these data, pilot versions of the ACUPOCHECK and Delphi questionnaires were developed. The Delphi questionnaire involved selecting types of AE for inclusion, establishing separate criteria for acupotomy-related AEs, and achieving a consensus on AE assessment. Thirteen Korean doctors with experience in acupotomy or AE research were recruited to participate in each Delphi round. Consensus was considered to have been reached if the critical value for the content validity ratio met or exceeded ***: The final ACUPOCHECK was developed using four rounds of the Delphi method and one face-toface consensus meeting. It included 12 local AEs(pain, hemorrhage, bruise, hematoma, edema, pruritus,rash, infection, nerve damage, dysesthesia, movement impairment, and pneumothorax) and 14 systemic AEs(disease aggravation, needle fatigue, sleepiness, procedural nausea, procedural vomiting, procedural headache, procedural dizziness, sweating, procedural shock, syncope, dyspnea, procedural pain, sleep disorder, and postprocedural infection). Separate criteria were established for pain, hemorrhage and bruising: pain was defined as pain that occurrs during daily activities and persists for longer than 72 h,hemorrhage as bleeding that continues for ≥ 3 min despite pressure application, and bruising as having a bruise with a diameter of ≥ 3 cm. Open-ended descriptions were allowed for AEs not covered by the checklist, and severity and causality were assessed using the Common Terminology Criteria for Adverse Events and modif

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Development of novel gene carrier using modified nano hydroxyapatite derived from equine bone for osteogenic differentiation of dental pulp stem cells

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Bioactive Materials 2021年第9期6卷 2742-2751页

作者： myung Chul Lee hoon Seonwoo Kyoung Je Jang Shambhavi Pandey Jaewoon Lim Sangbae Park Jae Eun Kim Yun-hoon Choung Pankaj Garg Jong hoon chung Department of Biosystems&Biomaterials Science and Engineering Seoul National UniversitySeoul08826Republic of Korea Department of Biosystems Engineering Seoul National UniversitySeoul08826Republic of Korea Department of Industrial Machinery Engineering Sunchon National University315 Maegok-dongSunchon57922Republic of Korea Interdisciplinary Program in IT-Bio Convergence System Sunchon National UniversitySuncheon57922Republic of Korea Division of Agro-system Engineering Gyeongsang National University501 Jinju-daeroJinju52828Republic of Korea Institute of Agriculture&Life Science Gyeongsang National UniversityJinju52828Republic of Korea Research Institute for Agriculture and Life Sciences Seoul National UniversitySeoul08826Republic of Korea Department of Otolaryngology Ajou University School of MedicineSuwon16499Republic of Korea Ajou University Graduate School of Medicine Bk21 Plus Research Center for Biomedical SciencesSuwon16499Republic of Korea BK21 Global Smart Farm Educational Research Center Seoul National UniversitySeoul08826Republic of Korea

Hydroxyapatite(HA)is a representative substance that induces bone *** research team extracted nanohydroxyapatite(EH)from natural resources,especially equine bones,and developed it as a molecular biological ***(PEI)was used to coat the EH to develop a gene *** verify that PEI is well coated in the EH,we first observed the morphology and dispersity of PEI-coated EH(pEH)by electron *** pEH particles were well distributed,while only the EH particles were not distributed and ***,the existence of nitrogen elements of PEI on the surface of the pEH was confirmed by EDS,calcium concentration measurement and fourier transform infrared spectroscopy(FT-IR).Additionally,the pEH was confirmed to have a more positive charge than the 25 kD PEI by comparing the zeta *** a result of pGL3 transfection,pEH was better able to transport genes to cells than 25 kD *** verification as a gene carrier for pEH,we induced osteogenic differentiation of DPSCs by loading the BMP-2 gene in pEH(BMP-2/pEH)and delivering it to the *** a result,it was confirmed that osteogenic differentiation was promoted by showing that the expression of osteopontin(OPN),osteocalcin(OCN),and runt-related transcription factor 2(RUNX2)was significantly increased in the group treated with BMP-2/*** conclusion,we have not only developed a novel nonviral gene carrier that is better performing and less toxic than 25 kD PEI by modifying natural HA(the agricultural byproduct)but also proved that bone differentiation can be effectively promoted by delivering BMP-2 with pEH to stem cells.

关键词： Nanocomposites Biomedical applications Hydroxyapatite Polyethyleneimine Gene carrier Osteogenic differentiation

Risk factors for computed tomography interpretation discrepancy in emergently transferred patients

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World Journal of Emergency Medicine 2022年第1期13卷 54-58页

作者： Hyun Sim Lee Jinwoo myung Min Ji Choi Hye Jung Shin Incheol Park Sung Phil chung Ji hoon Kim Department of Emergency Nursing Yonsei University Health systemSeoul 03722the Republic of Korea Department of Emergency Medicine College of MedicineYonsei UniversitySeoul 03722the Republic of Korea Department of Biostatistics Collaboration Unit College of MedicineYonsei UniversitySeoul 03722the Republic of Korea Department of Preventive Medicine and Public Health College of MedicineYonsei UniversitySeoul 03722the Republic of Korea

Radiologic imaging is a diagnostic tool that greatly affects patient outcomes,[1]and with the recent development of imaging technology,advanced imaging tests such as computed tomography(CT)have gained widespread accessibility in *** particular,CT is essential in the evaluation of patients in low-level emergency departments(EDs)because of its ability to answer clinical questions accurately and quickly.[2]

关键词： patients transferred clinical

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Stand development patterns of forest cover types in the natural forests of northern Baekdudaegan in South Korea

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Journal of Forestry Research 2015年第2期26卷 381-390页

作者： Ji Hong Kim Guangze Jin Sang hoon chung Department of Forest Management College of Forest and Environmental SciencesKangwon National University School of Forestry Northeast Forestry University Forest Ecology Division Forest Conservation DepartmentKorea Forest Research Institute

The purpose of this study was to classify current forest cover types,and to investigate stand development patterns for natural forests in six areas in northern Baekdudaegan,South ***-eight independent forest communities were aggregated into eight forest cover types by species composition in the overstory of each forest *** forest cover types were of mixed mesophytic,‘‘others’ ’ deciduous,Quercus mongolica dominant,*** pure,Pinus densiflora–***,***,Betula ermanii,and ***–*** ecological information was organized by importance value and species diversity for each forest *** on the correlation between species diversity index and the abundance of *** plus *** for corresponding forest cover types,we compared the developmental process and approximate successional pathway between each cover *** *** forest cover type changes into the ***–*** cover type,followed by the *** dominant cover type through continuous invasion of the oak ***,the *** pure cover type would spread toward the *** dominant cover type with a mixture of various deciduous tree *** *** dominant cover type progresses through the other deciduous cover types to the mixed mesophytic cover type with diversified composition and *** the mid to lower slopes,with loamy soils and good moisture conditions,various deciduous forest types should progress,by ecological succession,toward the mixed mesophytic cover type without any further disturbance.

关键词： Baekdudaegan Forest cover type Species composition Species diversity Stand development patterns

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Analysis of demographic characteristics in 3242 young age gastric cancer patients in Korea

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World Journal of Gastroenterology 2010年第2期16卷 256-263页

作者： Hye Won chung Sung hoon Noh Jong-Baeck Lim Department of Gastroenterology Yonsei University College of Medicine134 Shinchon-dongSeodaemun-gu120-752 SeoulSouth Korea Department of Surgery Yonsei University College of Medicine134 Shinchon-dongSeodaemun-gu120-752 SeoulSouth Korea Department of Laboratory Medicine Yonsei University College of Medicine134 Shinchon-dong Seodaemun-gu120-752 SeoulSouth Korea

AIM:To evaluate the epidemiologic features of young age gastric cancer(GC). METHODS:Retrospectively,a total of 3242 patients with GC between 18 and 45 years of age and 3000 sex-and age-matched controls were *** subjects were stratified into 3 groups based on age (A,18-30 years;B,31-40 years;C,41-45 years). Epidemiologic characteristics and risk factors were investigated with reference to their age and gender. RESULTS:Compared to controls,more frequent intake of high risk diet(P=0.00075),history of heavy smoking(P=0.00087),intake of heavy alcohol(P= 0.00091),lower social economic status(P=0.00083), body mass index>30(P=0.00097),urban residence(P=0.00065),and more frequent exposure to harmful occupational environments(P=0.00072)were observed in all age groups and both genders in young age *** relationships were weaker in females compared to males of the same age,and were stronger as the age of patients ***,in group C of young age GC patients,environmental factors played important roles in females and males with a similar body *** females,older age at first delivery(> 35 years),lack of lactation history,nulliparity,and poor nutritional status during pregnancy were significantly associated with an increased risk of GC(P=0.00034). In this study,252 patients(7.8%)had a family history of GC with high odds ratio(OR)(3.22-4.21).In particular, family history was more closely associated with GC in males(OR,4.21 in male vs 3.46 in female)and more advanced cases(P=0.00051). CONCLUSION:Hormonal associated factors were more commonly associated with females whereas environmental factors were more commonly associated with males in young age GC patients.

关键词： Young age gastric cancer Epidemiology Risk factor Age Gender

Experimental and Modeling Studies on the Chemical Vapor Infiltration with Respect to the Effects of Thermal Gradient and Other Operating Parameters

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Journal of Wuhan University of Technology(Materials Science) 2018年第3期33卷 525-532页

作者： Kyung Do Joo Do hoon Kim Gui Yung chung Department of Chemical Engineering Hong Ik University

Effects of operating parameters in the thermal gradient chemical vapor infiltration of propane such as thermal gradient, diffusion, infiltrations time, and concentration of propane were studied by focusing on the visualizations of the intrinsic effects of these parameters. A uniform deposition in the preform was obtained with a gradually increasing temperature along the gas flow. The uniformity of deposition through the preform got improved with increasing deposition time. Results of numerical modeling estimated the experimental data very well when the pre-exponential factor of the overall rate of carbon deposition from propane reported by Vaidyaraman[1] was multiplied by 4. The average density of a preform increased by about 3 times from 0.38 to 1.15 g/cm3 after 60 hr deposition with a thermal gradient under the conditions of 3% propane in nitrogen and 840 to 900 ℃.

关键词： TG-CVI propane C/C composites uniform deposition mathematical modeling

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Triangulated Cylinder Origami-Based Piezoelectric/Triboelectric Hybrid Generator to Harvest Coupled Axial and Rotational Motion

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Research 2021年第1期2021卷 460-468页

作者： Jihoon chung myunghwan Song Seh-hoon chung Woojin Choi Sanghyun Lee Zong-Hong Lin Jinkee Hong Sangmin Lee School of Mechanical Engineering Chung-Ang University84Heukseok-roDongjak-guSeoulRepublic of Korea Department of Chemical&Biomolecular Engineering College of EngineeringYonsei University50 Yonsei-roSeodaemun-guSeoul 03722Republic of Korea Institute of Biomedical Engineering and Department of Power Mechanical Engineering National Tsing Hua University101Section 2Kuang-Fu RoadHsinchu 30013Taiwan

Piezoelectric nanogenerators(PENGs)and triboelectric nanogenerators(TENGs)are representative technologies that can harvest mechanical *** general,piezoelectric/triboelectric hybrid generators can harvest considerable energy with a limited input;however,PENGs and TENGs entail different requirements for harvesting ***,PENGs produce a large output when a large mechanical strain is applied,and TENGs require a large surface area to produce a high ***,it is necessary to develop an innovative strategy in terms of the structural design to satisfy the requirements of both PENGs and *** this study,we developed a triangulated cylinder origami-based piezoelectric/triboelectric hybrid generator(TCOHG)with an origami structure to enable effective energy *** proposed structure consists of a vertical contactseparation TENG on the surface of the triangulated cylinder,PENG on the inner hinge,and rotational TENG on the top substrate to harvest mechanical energy from each *** generator could produce a separate electrical output with a single *** TCO-HG could charge a 22μF commercial capacitor and power 60 LEDs when operated.

关键词： harvesting cylinder generator

Does antiviral therapy reduce complications of cirrhosis?

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World Journal of Gastroenterology 2014年第23期20卷 7306-7311页

作者： Goh Eun chung Jeong-hoon Lee Yoon Jun Kim Department of Internal Medicine Healthcare Research InstituteGangnam Healthcare CenterSeoul National University HospitalSeoul 135-984South Korea Department of Internal Medicine and Liver Research Institute Seoul National College of MedicineSeoul 110-744South Korea

Chronic hepatitis B infection is associated with the development of cirrhosis, hepatocellular carcinoma, and finally liver-related mortality. Each year, approximately, 2%-5% of patients with hepatitis B virus (HBV)-related compensated cirrhosis develop decompensation, with additional clinical manifestations, such as ascites, jaundice, hepatic encephalopathy, and gastrointestinal bleeding. The outcome of decompensated HBV-related cirrhosis is poor, with a 5-year survival of 14%-35% compared to 84% in patients with compensated cirrhosis. Because the risk of disease progression is closely linked to a patient’s serum HBV DNA level, antiviral therapy may suppress viral replication, stabilize liver function and improve survival. This article briefly reviews the role that antiviral therapy plays in cirrhosis complications, particularly, in decompensation and acute-on-chronic liver failure.

关键词： Antiviral therapy Cirrhosis Complication Hepatitis B Decompensation