SINGAPORE'S ROLE IN PROMOTING THE USE OF ELECTRONIC CHART DISPLAY AND INFORMATION SYSTEM (ECDIS) TO ENHANCE NAVIGATIONAL SAFETY

Parry Oei 한국항해항만학회 1997 한국항해항만학회 학술대회논문집 Vol.1997 No.5

The Singapore Strait is one of the world's busiest waterways by international shipping. Coupled with this, the Port of Singapore is the world's busiest port in terms of shipping and cargo tonnage and the second busiest container port. Navigational safety is Singapore's concern and we are convinced that the ECDIS is the key to further enhancing navigational safety in the Singapore Strait and the port waters of Singapore. We have initiated the production of Electronic Navigational Chart data and invested in infrastructural supporting facilities such as DGPS broadcast service for use with ECDIS as well as other maritime system.

무지 외반증 교정 수술 후 합병증

배서영,이의종,Bae, Su-Young,Lee, Oei-Jong 대한족부족관절학회 2017 대한족부족관절학회지 Vol.21 No.2

The goal of surgical correction for hallux valgus is to achieve a painless, shoe-wearable, and relatively straight toe with a balanced joint motion that results in aesthetically and functionally satisfactory toe. To date, there has not been a consensus on the ultimate surgical procedure for hallux valgus correction. Unfortunately, such a consensus may be difficult since it is not uncommon to encounter complications after hallux valgus correction. Postoperative soft tissue complications include difficult wound healing, infection, hypertrophy, or pain of the scar, joint stiffness, and tendon or sensory nerve damage. Postoperative bony complications include malunion, nonunion, failure of fixation, failure of angle correction, recurred deformity, osteomyelitis, and failure of balance between the metatarsal heads. Herein, we review common complications after surgical correction of hallux valgus, such as stiff joint, bony complications, recurrence of the deformity, and hallux varus.

생체모방 촉매계에 의한 시클로헥산의 산화반응

박외숙,박철홍,남상성,김성보,이규완 ( Oei Suk Park,Cheol Hong Park,Sang Sung Nam,Seong Bo Kim,Kyu Wan Lee ) 한국화학공학회 1996 화학공학의이론과응용 Vol.2 No.2

Young Schema Questionnaire: Factor Structure and Specificity in Relation to Anxiety in Chinese Adolescents

Yulei Yan,Jianping Wang,Wei Yu,Li He,Tian P.S. Oei 대한신경정신의학회 2018 PSYCHIATRY INVESTIGATION Vol.15 No.1

ObjectiveaaThe goal of this study was to examine the factor structure of Young Schema Questionnaire-short form (YSQ-SF) in a sample of Chinese adolescents, and to explore which maladaptive schemas were associated with anxiety symptoms. MethodsaaYSQ-SF was administered to 983 nonclinical Chinese adolescents aged 13–17 years. Confirmatory factor analyses with weighted least squares means and variance adjusted estimation were conducted to examine the factor structure of YSQ-SF. Stepwise regression analyses were performed to identify schemas associated with anxiety symptoms. ResultsaaA bifactor model with 15 correlated factors fitted the data better than other priori defined models. Stepwise regressions showed Vulnerability to harm, Abandonment, Emotional inhibition, Subjugation, and Unrelenting standards schemas were associated with anxiety symptoms. Furthermore, different anxiety symptoms were associated with common and distinctive schemas. ConclusionaaMaladaptive schemas were already stably formed in Chinese adolescents, however there’s no robust evidence for the existence of domain. The explanatory value of maladaptive schemas for understanding psychopathology of anxiety in adolescence is discussed.

Field emission properties of self-assembled silicon nanostructures formed by electron beam annealing

S. Johnson,A. Markwitz,M. Rudolphi,H. Baumann,S.P. Oei,K.B.K. Teo,W.I. Milne 한국물리학회 2006 Current Applied Physics Vol.6 No.3

Arrays of silicon nanostructures on n- and p-type silicon (100) substrates were fabricated using electron beam annealing of untreated silicon at 1100 C. Following annealing for 15 s, the nanostructures exhibit an average height of 8 ± 1 nm and a surface density of 11 lm2, independent of the substrate conduction type. Following annealing for 600 s the individual nanostructures coalesce and the surface appears roughened with an rms roughness of 30 nm. The field emission properties of these nanostructure arrays have been assessed and electron emission through Fowler–Nordheim tunnelling was confirmed. The difference in threshold field for electron emission from the nanostructured and roughened substrates is related to the geometrical differences between the substrate surfaces. At large electric fields, space charge limited conduction dominates the field emission characteristics of the nanostructured surface.

소아에서 트램폴린 손상의 발생 빈도

신용운(Yong-Woon Shin),홍치운(Chi Woon Hong),이의종(Oei Jong Lee),박상윤(Sang-Yoon Park) 대한정형외과학회 2018 대한정형외과학회지 Vol.53 No.2

목적: 소아 외상 환자 중 근래 들어서 트램폴린 손상 환자의 빈도가 높아지고 있어서 실질적인 트램폴린 손상 환자의 발생 빈도와 손상의 중증도를 함께 알아보고자 하였다. 대상 및 방법: 2015년 9월부터 2017년 2월 사이에 1개 수련 병원 응급실을 방문하여 정형외과에 의뢰된 15세 이하의 환자들의 응급실 방문 기록을 후향적으로 조사하였고 이 중 외상 환자만을 선별하여 외상 원인을 조사하였다. 환자의 나이와 원인별 분석을 통하여 트램폴린 손상의 상대적인 빈도를 분석하였고 손상의 중증도를 함께 조사하였다. 결과: 18개월간 외상 환자는 1,807명이 내원하였고 이 중 트램폴린 손상 환자는 71명이었다(3.9%). 특이사항으로 4세 이하 환자에서 손상이 28명으로 상대적으로 발생률이 높았고 대신 이 군에서는 경증 손상이 14명이었다. 반면 5-15세에서는 43명의 환자들 중좌상 환자는 4명, 중등도 손상이 20명, 중증 손상이 19명이었다. 5-15세 연령에서 손상의 중증도 비율을 비교할 때 트램폴린 손상이 다른 스포츠 손상에 비하여 경도 손상은 적고(9.3% vs. 34.0%) 중증 손상은 더 많은 발생률을 보여 (44.2% vs. 26.3%) 상대적으로 위험한 운동으로 보인다(p=0.002). 결론: 트램폴린 손상이 최근에 손상 중 높은 발생 빈도를 차지하고 있고 손상 중증도도 더 높았다. 따라서 손상 예방 대책 마련이 필요하며, 보호자들에게도 손상에 위험성을 인식시킬 필요가 있다. Purpose: Recently, there has been increasing number of trampoline injuries at our pediatric orthopedic clinic and emergency room. Therefore, this study is to analyze the prevalence of the trampoline injuries with emergency room surveillance. Materials and Methods: Between September 2015 and February 2017, all patients under the age of 15 years, who visited emergency room of a teaching hospital with trauma and referred to the department of orthopedic surgery, was included; the cause of trauma was analyzed. The severity of injury was also evaluated and compared according to the cause of injury. Results: There were a total of 1,807 patients under the age of 15 years who visited our emergency room during the study period. There were a total of 71 trampoline injuries (3.9%). There were 28 patients below the age of 5 years, and among them, 14 minor injury were recorded; 43 patients were over the age of 5 years and with 4 minor, 20 moderate, and 19 severe injuries. In the age between 5 and 15 years, the prevalence of mild injury was lower in trampoline injury compared with those of other sports injuries (9.3% vs . 34.0%) and the prevalence of severe injury was higher in trampoline injury (44.2% vs . 26.3%) (p=0.002). Conclusion: Our findings indicate that the incidence of trampoline injury was lower than other country, but it was more severe than injuries from other sports. With increasing incidence of trampoline injuries, parents should be more mindful that trampolines are not safe and stricter supervision may be necessary.

성인 화농성 슬관절염의 관절경적 치료 후 임상 경과 및 결과에 미치는 원인 인자 분석

최정윤(Jung-Yoon Choi),이은용(Eun-Yong Lee),오승열(Seung-Yeol Oh),성민규(Min-Kyu Seong),이의종(Oei-Jong Lee) 대한정형외과학회 2017 대한정형외과학회지 Vol.52 No.3

목적: 화농성 슬관절염 환자의 관절경적 활액막 전 절제술 후 재발률 및 배양 양성에 미치는 원인 인자를 분석하고자 하였다. 대상 및 방법: 2011년 2월부터 2015년 2월까지 인제대학교 상계백병원에서 화농성 슬관절염으로 진단되어 관절경적 치료 후 1년 이상 추시한 총 69예의 환자에 대해 후향적 연구를 시행하였다. 술 전 혈액 검사 수치, 관절액 내 백혈구 수치, 배양 유무 등과 수술 후 재발률과의 연관성에 대하여 분석하였다. C-반응성 단백(C-reactive protein, CRP) 정상화 기간, 항생제 사용 기간 등을 조사하여 치유 효과 판정과 재발에 미치는 영향에 대하여 분석하였다. 결과: 분석 결과, 배양 양성 시 재발률이 유의하게 높았다. 균 배양과 상관관계가 있는 인자는 술 전 CRP 수치와 정상화 기간, 재원일수, 항생제 사용기간이었다. CRP 정상화 기간은 증상 발현부터 수술까지의 기간, 관절액 내 백혈구 수치, 균 배양 유무와 연관성이 있었다. 배양 검사에서는 총 16예(23.2%)에서 균이 동정되었는데 전체 환자 중 재발한 15예(21.7%) 중 배양 양성인 환자가 7예(10.1%)였다. 결론: 화농성 슬관절염에서 조기 진단과 치료는 CRP 수치의 빠른 정상화에 영향을 미친다. 술 전 CRP와 관절액 내 백혈구 수는 급성 감염에서의 진단적 가치가 있지만 각각 단일 인자로서의 한계가 있고 술 전 수치가 낮을 수 있어 환자의 증상 및 관절액의 양상과 함께 진단과 치료 과정에서 함께 고려해서 치료해야 한다. 균 배양 결과가 양성일 경우 재발률이 높아 예후 판단에 의미있는 인자가 될 수 있다. Purpose: The purpose of this study is to analyze the causative factors that affect the recurrence and positive culture results of pyogenic knee arthritis after arthroscopic treatment. Materials and Methods: A total of 69 patients, who were followed-up for more than one year after arthroscopid lavage and debridement for pyogenic knee arthritis, between February 2011 and February 2015, were retrospectively reviewed for analysis. We analyzed the factors affecting the recurrence rate, preoperative C-reactive protein (CRP) level, neutrophil count in synovial fluid, growth of bacteria in culture, and normalization of CRP level, and also analyzed potential factors that may influence the treatment results and recurrence. Results: The recurrence rate was significantly higher in the culture-positive group (p=0.014). Culture-positive patients had low preoperative CRP (p=0.004), shorter duration for normalization of CRP (p=0.037), shorter duration of hospital stay (p=0.001) and intravenous antibiotics use (p=0.021). The duration for normalization of the CRP level had was associated with symptom-to-treatment interval (p=0.005), neutrophil count in synovial fluid (p=0.007), and growth of bacteria in the culture (p=0.001). There were 16 cases (23.2%) culture-positive cases and 15 cases (21.7%) recurrent cases. Conclusion: According to our study, early diagnosis and management affect rapid recovery of the CRP level in pyogenic arthritis of the knee. Preoperative CRP and leukocyte counts in the joint fluid are of diagnostic value in acute infection. However, it should not be overlooked that their diagnostic value is limited as a single factor as they may have low preoperative values. Therefore preoperative CRP and leukocyte counts in the joint fluid should be considered in conjunction with symptoms and intra-articular fluid manifestations. Bacteria growth in the culture are meaningful factors in an evaluation for postoperative recovery and recurrence.

A Modified Echocardiographic Classification of Mitral Valve Regurgitation Mechanism: The Role of Three-dimensional Echocardiography

Lotte E. de Groot-de Laat,Jackie McGhie,Ben Ren,René Frowijn,Frans B. Oei,Marcel L. Geleijnse 한국심초음파학회 2019 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.27 No.3

In this report, we provide an overview of a new, updated echocardiographic classification of mitral regurgitation mechanisms to provide a more comprehensive and detailed assessment of mitral valve disorders. This is relevant to modern mitral valve repair techniques, with special attention to the added value of 3D-echocardiography.