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Noncommutative Versions of the Singer-Wermer Conjecture with Linear Left θ-derivations

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Acta Mathematica Sinica,English Series 2008年第11期24卷 1891-1900页

作者： Yong Soo jung Kyoo hong PARK Department of Mathematics Sun Moon University Asan Chungnam 336-708 Korea Department of Mathematics Education Seowon University Cheongju Chungbuk 361-742 Korea

The noncommutative Singer-Wermer conjecture states that every linear （possibly unbounded） derivation on a （possibly noncommutative） Banach algebra maps into its Jacobson radical. This conjecture is still an open q... 详细信息

关键词： linear left θ-derivation linear θ-derivation Jacobson radical nil radical

Managing Traumatic Stress Using a Mental Health Care Mobile App: A Pilot Study

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International Journal of Mental Health Promotion 2021年第3期23卷 385-393页

作者： Yun-jung Choi Eun-jung Ko Eun-joo Choi Youn-joo Um Red Cross College of Nursing Chung-Ang UniversitySeoul156-756Korea Graduate School of Nursing Chung-Ang UniversitySeoul156-756Korea

This study aims to contribute to improving mental health services and establishing a direction for disaster survivors by verifying the effectiveness of the TLS(Training for Life Skills)app,a mental health management mobile ***,22 disaster survivors received access to the app(with guidance)for eight weeks;we analyzed its effectiveness by examining each participant’s electroencephalography data,which were collected while they were utilizing the *** results of this study show that the use of the TLS app had a significant positive effect on emotional quotient,basic rhythm quotient(left brain,right brain),alpha blocking rate(left brain,right brain),and brain quotient of disaster *** TLS mobile app is expected to not only provide psychological first aid to disaster survivors but also to improve their life skills,which may allow them to gain information about their emotions;hence,it may provide the appropriate conditions needed to enable effective self-control and health management for disaster survivors.

关键词： Mobile applications trauma disasters mental health

Prospective comparison of prophylactic antibiotic use between intravenous moxifloxacin and ceftriaxone for high-risk patients with post-ERCP cholangitis

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Hepatobiliary & Pancreatic Diseases International 2017年第5期16卷 512-518页

作者： Nam Hee Kim hong joo Kim Ki Bae Bang Department of Internal Medicine Sungkyunkwan University Kangbuk Samsung Hospital Department of Internal Medicine Dankook University Hospital

BACKGROUND: The use of prophylactic antibiotics before endoscopic retrograde cholangiopancreatography(ERCP) is recommended by all major international gastroenterological societies, especially in the presence of an obstructed biliary system. This study compared the occurrence rate of post-procedural complications, including cholangitis and septicemia between prophylactic intravenous moxifloxacin and ceftriaxone in patients with bile duct obstruction scheduled for therapeutic ***: From November 2013 to July 2015, 86 consecutive patients with biliary obstruction with one or more factors predicting benefits of antibiotic prophylaxis prior to ERCP were included in the current randomized open-label non-inferiority trial(Clinical *** identifier NCT02098486). Intravenous moxifloxacin(400 mg/day) or ceftriaxone(2 g/day)were given 90 minutes before ERCP, and were administered for more than 3 days if the patient developed symptoms and signs of cholangitis or septicemia. Recalcitrant cholangitis was defined as persistence of cholangitis for more than 5 days after ERCP or recurrence of cholangitis within 30 days after ***: Recalcitrant cholangitis occurred in 1(2.3%) and 2(4.8%) patients receiving intravenous moxifloxacin and ceftriaxone group, respectively(P=0.612). Septicemia was noted in1(2.3%) and 1(2.4%) patient in intravenous moxifloxacin and ceftriaxone group, respectively(P=1.0). The mean hospital stay was also not significantly different between the moxifloxacin and ceftriaxone groups(8.8±7.2 vs 9.1±9.4 days, P=0.867). Antibiotic resistance of the isolated pathogens by in vitro activity assay was noted in 1(2.3%) and 2(4.8%) patients in the moxifloxacin and ceftriaxone group, respectively(P=0.612). CONCLUSION: Intravenous moxifloxacin is not inferior to intravenous ceftriaxone for the prophylactic treatment of post-ERCP cholangitis and cholangitis-associated morbidity.

关键词： endoscopic retrograde cholangiopancreatography cholangitis moxifloxacin ceftriaxone recalcitrant cholangitis

Modeling in Multi-Resolution and Its Applications

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Journal of Computer Science & Technology 2006年第2期21卷 272-278页

作者： Sungchan Kim Kunwoo Lee Taesik hong Moonki jung School of Mechanical and Aerospace Engineering Seoul National University San 56-1 Sillim-Dong Gwanak-Gu Seoul 151-752 Korea

It is becoming common for many designers to work together on very complex assemblies in a collaborative environment. To work efficiently in this environment, the capabilities to simplify the portions of an assembly and to reset it to the original resolution should be added to the current CAD systems. Thus operators realizing multi-resolution on B-rep were proposed in previous work. This paper illustrates a prototype multi-resolution system to integrate the proposed operators and its applications. The multi-resolution system can be used in similarity comparisons to reduce the calculation load and to get the full comparison result in the overall shape. Then the features recognized with this system can be used in more detailed comparisons. This system also can be used conceptually to solve security problems in collaborative design.

关键词： collaborative design level of detail multi-resolution similarity comparison

Exploring Challenges in Developing a Smart and Effective Assistive System for Improving the Experience of the Elderly Drivers

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Chinese Journal of Mechanical Engineering 2017年第5期30卷 1133-1149页

作者： Sebin jung hong-Ying Meng Sheng-Feng Qin Department of Electronic and Computer Engineering Brunel University London Electrical QRD PM UX SBT Division General Motors Korea Northumbria School of Design Northumbria University

As the overall population ages, driving-related accidents and injuries, associated with elderly drivers, have risen. Existing research about elderly drivers mainly focuses on factual data collection and analysis, indicating the elderly＇s growing fatal accident rates and their different behaviours compared to younger drivers. However, few research has focused on design-led practical solutions to mitigate the elderly＇s growing fatal accidents, by consid- ering their usability and body conditions, afflicting the elderly, such as decreased vision, hearing, and reaction times. In this paper, first, current worldwide situations on growing fatal accident rates for elderly drivers is reviewed and the key impact factors are identified and discussed with regarding to usability and design trend in the automotive technology for elderly. Second, existing smart vehicle technology-based solutions to promote safe driving are explored and their pros and cons are discussed and anal- ysed. Most of solutions are not created by people with driving difficulties, which are caused by health problems most commonly afflicting the elderly. Thirdly, diverse design-led research activities are taken, such as a survey, observation, and interviews to gain new understanding of what kinds of driving problems elderly drivers have and demonstrate how new system concepts could be developed for the elderly＇s benefits. Finally, it is found that the elderly＇s low vision and late reaction are main factors causing their driving difficulties. Based on this finding, usable vehicle system design ideas have been proposed, by utilising facial expression sensing technology as a solution. The proposed solutions would ensure reducing both the elderly＇s driving problems and high fatal accident rates and provide a more enjoyable driving environment for the elderly population.

关键词： Elderly drivers Aging health conditionsDriving behaviours Vision impairment Cognitiveimpairment. Hearing loss Reflexes Fatal collision

Mirizzi syndrome in an anomalous cystic duct:A case report

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World Journal of Gastroenterology 2007年第41期13卷 5527-5529页

作者： Cheol Woong jung Byung Wook Min Tae Jin Song Gil Soo Son hong Sik Lee Seung joo Kim Jun Won Um Department of Surgery Korea University College of Medicine126-15-Ga Anam-DongSungbuk-GuSeoul 136-705Korea Department of Internal Medicine Korea University College of Medicine126-15-Ga Anam-DongSungbuk-GuSeoul 136-705Korea

Mirizzi syndrome is a rare complication of gallstone disease,and results in partial obstruction of the common bile duct or a cholecystobiliary fistula. Moreover,congenital anatomical variants of the cystic duct are common,occurring in 18%-23% of cases,but Mirizzi syndrome underlying an anomalous cystic duct is an important clinical consideration. Here,we present an unusual case of typeⅠMirizzi syndrome with an uncommon anomalous cystic duct,namely,a low lateral insertion of the cystic duct with a common sheath of cystic duct and common bile duct.

关键词： Bile duct diseases and surgery Cholelithiasis Cholelithiasis and surgery, Cystic duct Cholangiography

Probiotics prophylaxis in pyelonephritis infants with normal urinary tracts

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World Journal of Pediatrics 2016年第4期12卷 425-429页

作者： Seung joo Lee Jihae Cha jung Won Lee Department of Pediatrics Ewha Women's University School of Medicine Kangnam Sacred Heart Hospital Hallym University School of Medicine

Background:Pyelonephritis in infants is considered as a major factor for the formation of renal *** prevent recurrent pyelonephritis and renal damage,prophylaxis is extremely *** aim of this study was to compare the effectiveness of probiotic and antibiotic prophylaxis or no-prophylaxis in infants with pyelonephritis and normal urinary ***:Altogether 191 infants,who were diagnosed with acute pyelonephritis,proven to have normal urinary tracts and followed up for 6 months on prophylaxis,were retrospectively *** to the types of prophylaxis,the infants were divided into three groups[probiotics(Lactobacillus species),antibiotics(trimethoprim/sulfamethoxazole,TMP/SMX),and noprophylaxis].The incidence of recurrent urinary tract infection(UTI)during 6 months after the development of pyelonephritis,main causative uropathogens,and its antimicrobial sensitivities were ***:The incidence of recurrent UTI in the probiotic group was 8.2%,which was significantly lower than 20.6%in the no-prophylaxis group(P=0.035)and was not significantly different from 10.0%of the antibiotic group(P=0.532).The significant difference between the probiotic and no-prophylaxis groups was seen only in male infants(P=0.032).The main causative organism of recurrent UTI was Escherichia coli(***),which was not different among the three groups(P=0.305).The resistance rate of *** to TMP/SMX was 100%in the antibiotic group,which was significantly higher than 25.0%in the probiotic group and 41.7%in the no-prophylaxis group(P=0.008).Conclusion:Probiotic prophylaxis was more effective in infants with pyelonephritis and normal urinary tract than in those with *** could be used as a natural alternative to antibiotic prophylaxis.

关键词： antibiotic prophylaxis antibiotic resistance probiotic prophylaxis pyelonephritis

Performance evaluation of the use of tire-derived fuel fly ash as mineral filler in hot mix asphalt concrete

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Journal of Traffic and Transportation Engineering(English Edition) 2020年第2期7卷 249-258页

作者： Min Ju Choi Yong joo Kim Hyeok jung Kim Jae Jun Lee BILTZONE Co. Ltd.Hwaseong 18514South Korea Korea Institute o f Civil Engineering and Building Technology Goyang-Si 10223South Korea Industry-Academic Cooperation Foundation Center Hankyong National UniversityAnseong-si 17579South Korea Department of Civil Engineering Chonbuk National UniversityJeonju 54896South Korea

According to deplete natural resources and need to protect the environment,the demand of a usage of waste material has significantly *** studies are currently being carried out on the development of innovative and environmentally friendly materials for securing the safety of road users and improving the performance and durability of *** example,studies are currently being conducted on the use of waste tires as a substitute for currently used *** the development of the automobile industry,the amount of waste tire has continuously increased in accordance with the increased vehicle ***-derived fuel(TDF)has been used as a fuel source with generated TDF fly *** filler,made of fine mineral particles of a physical size passing the number 200 standard mesh sieve(75 micron),plays an important role in asphalt mixtures *** paper presents an application of TDF fly ash as filler in hot mix asphalt(HMA).In this study,the performance of TDF fly ash was confirmed through a comparison with three other mineral fillers:stone dust,cement,and hydrated *** tests including Marshall stability test,moisture sensitivity test,dynamic immersion test,and a wheel tracking test were performed to investigate the difference in the behaviors of the samples with different parameters considered in this *** results show that the mechanical performance of hot mix asphalt using TDF fly ash satisfied the quality standard specification of the Ministry of Land,Infrastructure and Transport(MOLIT),*** can be concluded that the use of TDF fly ash as a mineral filler in HMA not only satisfied the mechanical properties,but also reduced the volume of the pollutants waste in the environment.

关键词： Asphalt mixture TDF fly ash Marshal stability Moisture sensitive TSR

Malignant sweat gland tumor of breast arising in pre-existing benign tumor: A case report

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World Journal of Clinical Cases 2019年第19期7卷 3033-3038页

作者： Jin Kyung An Jeong joo Woo Young Ok hong Department of Radiology Nowon Eulji Medical CenterEulji UniversitySeoul 01830South Korea Department of Pathology Nowon Eulji Medical CenterEulji UniversitySeoul 01830South Korea

BACKGROUND Sweat glands belong to skin *** gland tumors are uncommon,especially when they occur as malignant tumors in the *** report a case of malignant sweat gland tumor of the breast,including imaging and pathological *** SUMMARY A 47-year-old woman visited our hospital with a non-tender palpable lesion in her left *** lesion had not shown changes for 10 ***,it recently increased in *** showed a well circumscribed cystic lesion with internal debris and fluid-fluid *** resonance imaging showed a well circumscribed oval mass with T1 hyper-intensity compared to muscle and T2 high signal *** was a small enhancing mural component in the inner wall of the *** tumor was *** pathologic result was a malignant transformation of benign sweat gland tumor such as *** lesion was treated with excision and radiation *** 1-year follow up,there was no local recurrence or metastasis in the *** In the case of a rapid growing cystic mass in the nipple and subareola,it is necessary to distinguish it from a malignant sweat gland tumor.

关键词： Sweat gland neoplasm Breast Ultrasonography Magnetic resonance imaging