작업관련 상지의 근골격계 질환 선별 및 감시를 위한 미국 NIOSH-style 설문지와 Nordic-style 설문지의 타당도 비교

최원준,성낙정,강영중,한상환 大韓産業醫學會 2008 대한직업환경의학회지 Vol.20 No.3

목적: 작업관련 근골격계 질환의 선별검사에 사용되는 두 종류의 증상설문지(NIOSH 스타일 설문지,노르딕 스타일 설문지)의 결과를 신체검사 결과와 비교하여 타당도를 평가하고,활용방안에 대하여 검토하고자 수행되었다. 방법: 인천에 위치한 3개의 제조업 사업장 근로자 208명을 대상으로 NIOSH 스타일 설문지와 노르딕 스타일 설문지를 작성하도록 하고,신체검사를 시행하였다. 신체 검사 소견과 과거병력을 바탕으로 한 환례정의를 최적기준으로 하여 두 설문지의 민감도,특이도,양성예측도,음성예측도,일치도를 구하여 타당도를 조사하였다. 결과: NIOSH 스타일 설문지는 민감도 59.5%, 특이도 68.0%, 양성예측도 68.0%, 음성예측도는 59.5%로 조사되었다. 카파계수(Kappa coefficient)로 나타낸 일치도는 0.27(95% confidence interval 〔CI〕=0.14∼0.40)이었다. 노르딕 스타일 설문지는 민감도 73.9%, 특이도 68.0%,양성예측도 72.6%,음성예측도 69.5%로 조사되었다. 카파계수로 나타낸 일치도는 0.42(95% CI=O.30∼0.54)이었다. NIOSH 스타일 설문지와 노르딕 스타일 설문지의 일치도는 카파계수 0.43(95% CI= 0.31∼O.55)로 나타났다. 증상강도의 합계점수가 2점 이상인 경우를 기준으로 했을 때,노르딕 스타일 설문지의 민감도는 72.1%,특이도는 70.1%이었다. 결론: 두 설문지 모두 적절한 타당도를 가지고 있는 것으로 평가되었다. NIOSH 스타일 설문지는 증상의 빈도,지속기간,강도를 조사할 수 있고 이에 따라 다양한 양성기준을 설정할 수 있다. 노르딕 스타일 설문지는 민감도가 높은 편이고,증상의 강도를 설문항목에 포함시킬 경우 양성기준을 다양화하기 쉽다는 점과 문항이 간단하고 작성하기 쉽다는 점을 장점으로 들 수 있다. 조사 목적과 작업장의 특성에 따라 두 설문지를 적절하게 활용할 수 있을 것으로 기대된다. Objectives: The study aimed to compare the validity of two questionnaires (NIOSH- and Nordic-style) which are used for the screening and surveillance of neck and upper extremity work-related musculoskeletal disorders. To evaluate the validity, clinical examination was used as the reference. Methods: Two types of questionnaire were filled out by 208 workers from three different plants in Incheon, Korea. Workers underwent clinical examination by three occupational physicians. The presence of a symptom or sign in at least one body region was regarded as positive in both results of questionnaire and case definition using clinical examination. Validity was evaluated by sensitivity, specificity, positive predictive value, negative predictive value and agreement (Kappa coefficient). For the Nordic-style questionnaire, the sum of the symptom scores was used to yield the ROC curve. Results: The results of the NIOSH-style questionnaire were sensitivity 59.5%, specificity 68.0%, positive predictive value 68.0%, negative predictive value 59.5%, and Kappa coefficient 0.27(95% confidence interval [CI]=0.14∼0.40). The results of the Nordic-style questionnaire were sensitivity 73.9%, specificity 68.0%, positive predictive value 72.6%, negative predictive value 69.5%, and Kappa coefficient 0.42 (95% CI=0.30∼0.54). For the Nordic-style questionnaire, sensitivity was 72.1 % and specificity was 70.1 % based on the sum of the symptom scores≥2. Conclusions: Both questionnaires demonstrated appropriate validity for the screening and surveillance of work-related musculoskeletal disorders. The selection of questionnaire may depend on the purpose of investigation and characteristics of the work place.

초등학교 학생의 진로 인식에 관한 연구 : 강원도 지역을 중심으로 Focused on Kang-won Province

성낙철,최준섭 韓國實科敎育硏究學會 1999 實科敎育硏究 Vol.5 No.2

The purpose of this study is aimed to provide necessary data and information to career education by analyzing the future career cognition level of elementary school students in Kang-won province district. The students to the number of 461 of the 5th and 6th grade students of elementary schools in Kang-won province were served as subjects for this study. They were selected and classified according to their living area, gender, learning achievement, and economic status. The main results of this study were as follows: (1) The students had their own talent(63.2%), and jobs were indispensable elements to sustain our society. The children to tell the 30 kinds of jobs or so are over 50% (2) The criteria to choose their future jobs was ability and aptitude(91.8%), and the purpose of their job is to develop their own talent, hobby and to serve their society. (3) The order of motives on career selection were decided by 峯 TV 峰 parents 捧 reading 棒 teacher, and the teaching method for career instruction must be reconsidered. (4) The 63.7% of students were in consensus of opinions to develop the future career problems between their parents and students. If their opinions about their future career problems were in discord with their parents, the 22.3% of students will consult with their teacher to resolve the conflicts.

초등 교육 발전에 기여하는 교육대학의 현장지도 역할에 관한 연구

김성회 / 이종철 / 전구호 / 정용팔 / 최동준 / 문낙주 공주교육대학교 초등연구원 1977 公州敎大論叢 Vol.13 No.2

.

The impact of COVID-19 on trauma patients and orthopedic trauma operations at a single focused training center for trauma in Korea

Choi Wonseok,Kim Hanju,Son Whee Sung,Sakong Seungyeob,Cho Jun-Min,Choi Nak-Jun,Noh Tae-Wook,Kim Namryeol,Cho Jae-Woo,Oh Jong-Keon 대한외상학회 2022 大韓外傷學會誌 Vol.35 No.3

Purpose: The objective of this study was to determine the effects of coronavirus disease 2019 (COVID-19) on the volume of trauma patients, the number of orthopedic trauma operations, and the severity of injuries. We also investigated the correlations between social distancing and these variables. Methods: This was a retrospective review of trauma patient cases at a single focused training center for trauma in Korea from January 2017 to April 2021. The COVID-19 group included patients treated from January 1 to April 30 in 2020 and 2021, and the control group included patients treated during the same months from 2017 to 2019. The volume of trauma patients according to the level of social distancing was evaluated among patients treated from August 2, 2020 to November 23, 2020. Results: The study included 3,032 patients who presented to the emergency department with traumatic injuries from January to April 2017 to 2021. The average number of patients was 646.7 and 546.0 in the control and COVID-19 groups, respectively. The percentage of patients injured in traffic accidents (TAs) decreased from 25.0% to 18.2% (P<0.0001). The proportions of in-car TAs and pedestrian TAs also decreased from 6.7% and 10.8% to 3.5% and 6.0%, respectively (P=0.0002 and P<0.0001). The percentage of bicycle TAs increased from 2.4% to 4.0% (P=0.0128). The proportion of patients with an Injury Severity Score above 15 and the mortality rate did not change significantly. As the level of social distancing increased, the number of trauma patients and the number of trauma injuries from TAs decreased. The number of orthopedic trauma operations also depended on the social distancing level. Conclusions: The number of trauma patients presenting to the emergency department decreased during the COVID-19 period. The volume of trauma patients and orthopedic trauma operations decreased as the social distance level increased.

Optimization of Material Properties for Coherent Behavior across Multi-resolution Cloth Models

( Nak-jun Sung ),( Shane Transue ),( Minsang Kim ),( Yoo-joo Choi ),( Min-hyung Choi ),( Min Hong ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.8

This paper introduces a scheme for optimizing the material properties of mass-spring systems of different resolutions to provide coherent behavior for reduced level-of-detail in MSS(Mass-Spring System) meshes. The global optimal material coefficients are derived to match the behavior of provided reference mesh. The proposed method also gives us insight into levels of reduction that we can achieve in the systematic behavioral coherency among the different resolution of MSS meshes. We obtain visually acceptable coherent behaviors for cloth models based on our proposed error metric and identify that this method can significantly reduce the resolution levels of simulated objects. In addition, we have confirmed coherent behaviors with different resolutions through various experimental validation tests. We analyzed spring force estimations through triangular Barycentric coordinates based from the reference MSS that uses a Gaussian kernel based distribution. Experimental results show that the displacement difference ratio of the node positions is less than 10% even if the number of nodes of MSS^sim decreases by more than 50% compared with MSS^ref. Therefore, we believe that it can be applied to various fields that are requiring the real-time simulation technology such as VR, AR, surgical simulation, mobile game, and numerous other application domains.

Acute Onset Hypotension in Surgical Ward

Nak-Jun Choi 대한외과학회 2020 대한외과학회 학술대회 초록집 Vol.2020 No.11

Choice of Analgesia and Sedatives

Nak-Jun Choi 대한외과학회 2021 대한외과학회 학술대회 초록집 Vol.2021 No.11

First Report of Powdery Mildew Caused by Erysiphe cruciferarum on Arabidopsis thaliana in Korea

Choi, Hyong-Woo,Choi, Young-Jun,Kim, Dae-Sung,Hwang, In-Sun,Choi, Du-Seok,Kim, Nak-Hyun,Lee, Dong-Hyuk,Shin, Hyeon-Dong,Nam, Jae-Sung,Hwang, Byung-Kook The Korean Society of Plant Pathology 2009 Plant Pathology Journal Vol.25 No.1

In November 2008, typical powdery mildew symptoms were observed on leaves of Arabidopsis thaliana ecotype Col-0 plants in a growth room under controlled laboratory conditions at Korea University, Seoul. The disease was characterized by the appearance of white powder-like fungal growth on the surface of infected leaves. As the disease progressed, infected leaves exhibited chlorotic or necrotic brown lesions, and leaf distortion and senescence. Conidiophores of the causal fungus were hyaline, unbranched, 3-4 celled, cylindrical, and $80-115{\times}6-9{\mu}m$ in size. Singly produced conidia (pseudoidium type) were hyaline, oblong to cylindrical or oval in shape, and $26-55{\times}15-20{\mu}m$ in size with a length/width ratio of average 3, angular/rectangular wrinkling of outer wall and no distinct fibrosin bodies. Appressoria on the hyphae were multi-lobed. These structures are typical of the powdery mildew Oidium subgenus Pseudoidium, anamorph of the genus Erysiphe. The measurements of the fungal structures coincided with those of Erysiphe cruciferarum. The phylogenetic analysis using ITS rDNA sequences revealed that the causal fungus Erysiphe sp. KUS-F23994 is identical to E. cruciferarum. The isolated fungus incited powdery mildew symptoms on the inoculated Arabidopsis leaves, which proved Koch's postulates. Taken all data together, we first report the occurrence of powdery mildew disease of A. thaliana caused by Erysiphe cruciferarum in Korea.

Suitable Animal Models for In-vivo Study in Liver Metastasis of Human Colon Cancer

Nak Jun Choi,Min Sung An,Sun Hee Lee,Sun-Hee Kim,Ki Beom Bae,Kwan Hee Hong 대한외과학회 2015 대한외과학회 학술대회 초록집 Vol.2015 No.05

직장암에서 복강경 수술과 개복 수술 후 단기간의 종양학적 결과에 대한 비교

최낙준(Nak Jun Choi),유종한(Jong Han Yoo),이홍태(Hong Tae Lee),신재호(Jae Ho Shin),박하경(Ha Kyoung Park),안민성(Min Sung An),하태권(Tae Kwun Ha),김광희(Kwang Hee Kim),배기범(Ki Beom Bae),김태현(Tae Hyun Kim),최창수(Chang Soo Choi),오 대한종양외과학회 2013 Korean Journal of Clinical Oncology Vol.9 No.1

Purpose: The aim of this study was to assess the impact of laparoscopic vs. conventional open surgery for rectal cancer on clinical and oncologic outcome in a multi-modal setting. Methods: In total, 940 patients who underwent conventional open surgery between February 1995 and October 2007, and 311 patients who underwent laparoscopic surgery between December 2006 and May 2011 were enrolled retrospectively. Oncologic outcomes included 3-year overall survival (OS) and disease free survival, factors affecting them, and risk factors for local and systemic recurrence. Results: No difference was found between laparoscopic surgery and conventional open surgery in terms of OS, disease free survival rate at stages I and II, but the 3-year OS for stage III was different between the groups (70.26% for conventional open surgery vs. 90.14% for laparoscopic surgery; P=0.0002). The 3-year disease free survival rate for stage III was 56.59% for conventional open surgery vs. 56.65% for laparoscopic surgery (P=0.6578). The local recurrence rates were 6.81% vs. 8.47% (conventional open surgery vs. laparoscopic surgery; P=0.4960). The systemic recurrence rates were 15.64% vs. 15.71% (conventional open surgery vs. laparoscopic surgery; P=0.9713). Conclusion: Laparoscopic surgery for rectal cancer showed a similar short-term oncologic outcome to conventional open surgery. This suggests that laparoscopic surgery is an acceptable alternative to conventional open surgery for selected patients with rectal cancer.