Computer-aided axiograph를 이용한 하악의 전방운동거리 분석

백명환,정호균,강홍구 중앙대학교 의과대학 의과학연구소 1997 中央醫大誌 Vol.22 No.2

Using axiography, dentists can observe and analyse the mandibular movements three dimensionally. The axiography can also reveal the subclinical arthrophthy in temporomandibular joint. The recent introduction of computer-aided axiography (CADIAX) gives a additional advantage that can display the enlarged diagram of condylar movement tracing so as to diagnose the initial changes of disc displacement more readily. The purpose of this study was to determine the protrusive length of condylar movement in sagittal plane. With the aid of diagnostic computer software, the length of the pathways was measured in 67 patients and the characteristics of curves were analyzed. The observed interquartile ranges of the length of protrusive condylar movement were 7.37-11.33 mm in the right joint and 7.20-10.42 mm in the left joint. The mean values of the protrusive length were 9.57 mm for the right joint and 9.28 mm for the left joint.

일부 조선업 근로자의 직업성 요통 발생실태 및 위험요인에 관한 연구

고상백,김형식,최홍렬,김지희,송인혁,박준한,박종구,장세진,차봉석 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.1

목적 : 이 연구에서는 한 사업장의 동일한 코호트내에서 직업성 요통의 발생 및 발생원인에 대해 조사하고자 하였다. 방법 : 연구대상은 1995년 12월 현재 한 조선업체에 종사하는 근로자 중에서 1995년 12월 31일 까지 요통이 이미 발생한 근로자와 1995년 당시 검진 미수검자를 제외한 9,784명을 연구대상으로 하였다. 요통 발생군은 1996년부터 1998년까지 3년간 추적 관찰하여 요통으로 4일 이상 통원 또는 입원치료를 받은 근로자로 하였다. 발생률은 요통발생 당시 연도를 기준으로 하여 해당 연도의 4일 이상 신규치료를 받은 중등도 이상의 요통근로자를 분자로 하였고, 해당년도 사업장의 종사하는 근로자 총수(과거 요통자 제외)를 분모로 간주하였다. 요통 발생군은 외상성 요통과 직업관련성 요통으로 대별하였으며, 위험요인과 질병 발생간의 관련성을 보기 위한 Cox모형에서 그 위험도를 파악하고자 할 때에는 직업성 요통만을 환자군으로 선정하였다. 결과 및 결론 . 요통 발생률은 근로자 천명당 1998년 3.1명, 1997년 8.8명, 1996년 7.8명이었다. 요통점유율의 범위는 10.99∼25.66이었다. 연령별 요통 발생률은 30대, 40대에서 높은 발생률을 보였다. 진단명에 따른 발생률은 추간판 탈출증, 염좌, 척추골절, 척추분리증, 척추협착증 순이었다 직업성 요통 발생자들의 직업적 요인을 알아보기 위하여 요통 발생 당시 작업형태를 알아본 결과, 물건을 들다가 66명(35.3%)이 발생하여 가장 큰 빈도를 차지하였고, 물건을 옮기는 과정에서 19명(10.2%)이 발생하여 2위를 차지하였고, 넘어지거나(8.6%), 물건을 당기는 자세(8.0%), 값자기 일어서다(7.5%) 순으로 요통이 발생하였다. 직업성 요통에 영향을 주는 일반적 특성 및 직업적 특성에 판한 상대위험도 및 95% 신뢰구간를 구한 결과, 요통발생에 영향을 주는 유의한 변수로는 체질량 지수(비만도), 교대여부, 중량물 취급여부였다. Objectives : This study was conducted to estimate the incidence rate, and to identify the risk factors for the occupational low back pain among shipyard workers. Methods : The study subjects consisted of 9,784 workers who were employed in a ship-building industry (excluded workers who had a history of low pack pain before 1995 or did not take periodic health examination in 1995) . The cases were 220 people who experienced back pain from January 1, 1996 to December 31, 1998. To assess risk factors for occupational low back pain, Cox propotional hazard model was used. Results : During the recent three years from 1996 to 1998, the incidence rate per 1,000 persons was 7.8 in 1996, 8.8 in 1997, and 3.1 in 1998. The main causes of work-related low back pawn were sprain, strain and disc herniation. Lifting was the most common cause of back pain (35.3%) , and carrying (10.2%) and pulling (8.0%) were followed. In Cox proportional harzard model, independent risk factors for back pain were body mass index(R.R. ; 1.54, 95% C.1. : 1.06-2.25), shift work(R.R. ; 1.65, 95% C.1. : 1.19-2.28), and lifting heavy material(R. R., 3.95, 95% C.1. : 2.29-6.82). Conclusions . This study suggests that the risk factors of back pawn In shipyard work-ers were body mass index, shift work and lifting.

A New Black Soybean Cultivar, "Cheongja 3" with Green Cotyledon, Medium-Late Maturity and High Anthocyanin

Hong Tae Yun,Keum Yong Park,Jung Kyung Moon,Yong Ho Kim,Sun Lim Kim,Ja Hwan Ku,Yeong Ho Lee,Yong Hwan Ryu,In Youl Baek,Won Young Han,Hyun Tae Kim,Jun Hyeon Cho,Jong Min KoDoo 한국육종학회 2005 한국육종학회지 Vol.37 No.4

Muscle mass measurements in hip fracture patients and control general population depending on dual-energy X-ray absorptiometry device used: The General Electric Lunar and Hologic systems

Jun-Ku Lee,Seong-Eun Byun,Minki Lee,Gotak Kim,Eugene Baek,Soo-Hong Han 대한골다공증학회 2020 Osteoporosis and Sarcopenia Vol.6 No.2

Objectives: The prevalence of sarcopenia, an independent risk factor for fragility fractures, is high in geriatric hip fracture patients. We aim to compare patients with hip fractures to the general population using different dual-energy X-ray absorptiometry (DXA) devices e General Electric (GE) Lunar and Hologic. Methods: We retrospectively reviewed data of patients diagnosed with osteoporotic hip fractures. At our institute, 252 patients with hip fractures were measured with the GE Lunar DXA. The control group included 252 matched individuals from a general population dataset whose data were measured with the Hologic DXA; controls were selected using nearest-neighbor propensity score matching. Measurements included appendicular lean mass (ALM), bone mineral density, and subsequent rates of sarcopenia and osteoporosis. Results: The BMD T-score was significantly lower in patients with hip fractures than in matched controls (-2.7 vs. -2.1, respectively; P < 0.001). However, mean lean body mass of the arm was significantly greater in the hip fractures group compared to the matched control groups (4.092 kg vs. 3.869 kg, respectively; P = 0.024). Additionally, mean lean body mass of the leg was similar between groups (11.565 kg vs. 11.986 kg, respectively; P = 0.084). ALM/height2 and subsequent sarcopenia rates were not different between groups (hip fractures and 6.257 kg/m2 and 38.5%; matched controls, 6.198 kg/m2 and 33.7%). Conclusions: Despite experiencing hip fractures, muscle mass measurements and sarcopenia prevalence were similar between the groups. Muscle mass measurements for evaluating sarcopenia present significant discrepancies according to the DXA used.

호텔경영에 있어서 효과적인 아웃소싱 ( outsourcing ) 운영방안

김홍범(Hong Bumm Kim),구자혁(Cha Hyeok Ku),백현숙(Hyun Sook Baek) 한국호텔외식관광경영학회 2002 호텔경영학연구 Vol.11 No.1

This study attempted to research an actual situation and status of outsourcing in the super deluxe hotels, Seoul region and pursued for future operation and reform plans. The data of this study was taken from the specialists of personnel and general affairs section chiefs generally grasping the present condition of labor demand and supply for super deluxe hotels in Seoul region. The results of the questionnaires analyzed by frequency analysis and Kendall`s W coefficient of concordance are as followings; First, as to the performance purpose of outsourcing, the descending highest rates are `reduction of operation cost`, `profit-increase through restructuring`, `management /control difficult affairs`. Second, as to the selection element of vendors, `price condition`, `A/S including service level` and `confidence in management capability for relevant area` were significant factors. Third, the disadvantages of outsourcing were `degrading of service quality, deterioration of regular personnel`s labor will` and `difficulty of uniform strategic management`. Fourth, the important success factors of outsourcing were enumerated as `maintenance mutual reliable relationship`, `selection of right businesses`, `harmony of a company goal and a target`. Fifth, it was found the satisfaction of outsourcing was extremely high in cost reduction, which was consistent with the purpose of performance. The judgement of outsourcing is only made when three points are consistent; if it has compulsory power, if a using company can get higher quality than expected and it the vendor has specialization. To support this, it is needed related laws should be revised, and deregulated, and operations control should be adjusted to the actual condition of super deluxe hotels.

차광처리에 따른 고추의 카로티노이드, 유리아미노산 및 프롤린 함량에 미치는 영향

강백송(Baek Song Kang),이태헌(Tae Heon Lee),김대성(Dae Seong Kim),홍순임(Sun Im Hong),하서연(Seo Yeon Ha),위승환(Seung Hwan Wi),이희주(Hee Ju Lee),이상규(Sang Gyu Lee),구양규(Yang Gyu Ku) 한국원예학회 2019 한국원예학회 학술발표요지 Vol.2019 No.5

건설현장 외국인근로 실태조사 및 개선요소 도출

백낙규(Nak-Ku Baek),홍준표(Jun-Pyo Hong),임형철(Hyoung-chul Lim) 한국산학기술학회 2018 한국산학기술학회논문지 Vol.19 No.1

심각한 인력난을 겪은 기업들은 공장을 해결이 쉬운 해외로 이전하거나, 외국인근로자의 고용을 증가시켜 인력난을 해결하고 있다. 건설현장 역시, 그들을 노동자로 고용하여 부족한 인력을 보충하고 있는 등, 외국인근로자에 대한 수요는 시간이 지날수록 점차 더 증가하고 있는 실정이다. 최근 외국인근로자의 국내 건설현장 투입과 관련된 정책은 외국인근로자 투입여부에 대한 논의에서 실질적인 투입실태 및 효율적인 관리방안을 모색하는 방향으로 전환되고 있다. 본 연구는 대상지역 건설현장에 참여하고 있는 외국인근로자의 현황과 투입실태 및 관리자 입장에서 외국인근로자의 문제점을 조사하고, 외국인근로자의 효율적 활용을 위한 개선 방법을 도출하고자 하였다. 본 연구의 진행을 위해서는 사례조사 대상 건설 현장을 찾아 외국인근로자와 내국인근로자(관리자)를 중심으로 외국인 근로자에 대한 실태 관련 설문조사를 실시하였고, 설문대상자를 중심으로 1:1 인터뷰를 추가 진행함으로써 설문의 신뢰성을 확보하고자 하였다. 실태조사를 시행하여 얻어진 자료는 SPSS 분석프로그램을 이용하여 각 항목에 응답 비율을 분석한 후, 분석 기준 항목에 따라 그래프화하여 표현하였다. 그 결과 문제점으로 제도적 차원의 문제, 의사소통의 문제, 기능미숙으로 인한 품질저하와 같은 문제점들이 많이 나타났다. 따라서 본 연구는 외국인근로자의 효율적 활용을 위한 개선방안을 언어 교육, 임금, 고용과 관련된 제도적 차원의 개선 등으로 도출하였다. Companies that have suffered serious labor shortages are relocating their factories abroad where they can solve this problem by increasing the employment of foreign workers. Construction sites also employ foreign workers to supplement the scarce manpower, and the demand for foreign workers has been gradually increasing over time. Recently, based on discussions on whether or not to introduce foreign workers, the policy on the input of foreign workers into domestic construction sites has been shifted to exploring the actual input conditions and efficient management methods. In this study, we investigated the current status and input situation of foreign workers at the construction sites of the target area, analyzed the problems they posed from the manager"s viewpoint, and derived a method of improving the utilization of foreign workers at construction sites. In order to proceed with this study, we surveyed the actual situation of the construction sites, which consisted mainly of foreign workers and domestic workers (managers), by investigating the construction sites, and conducted 1: 1 interviews to ensure the reliability of the survey. The data obtained from the survey were analyzed using the SPSS analysis program, and the response rate was analyzed for each item. As a result, various problems, such as institutional problems, communication problems, and quality deterioration due to malfunction, appeared. Therefore, this study derives an improvement plan for the efficient utilization of foreign workers by improving the institutional level related to their language education, wages and employment.

Erythropoietin Inhibits Gluconeogenesis and Improves Glucose Tolerance in EPO Transgenic Pig

Sun-young Baek,Won-kil Lee,Soo-hyne Park,Mi-Ryung Park,Kyung-Woon Kim,Jin-Ki Park,Sung-Ku Hong,Hak-Jae Chung 한국동물생명공학회(구 한국동물번식학회) 2013 발생공학 국제심포지엄 및 학술대회 Vol.2013 No.1

Ultrahigh density sub-10 nm TiO₂ nanosheet arrays with high aspect ratios via the spacer-defined double-patterning process

Bak, Chang Hong,Ku, Se Jin,Jo, Gyeong Cheon,Jung, Kyoungok,Lee, Ha Jin,Kwon, Se Hun,Kim, Jin-Baek Elsevier 2015 Polymer Vol.60 No.-

<P><B>Abstract</B></P> <P>A novel approach for fabricating ultrahigh-density sub-10 nm TiO<SUB>2</SUB> nanosheet arrays with high aspect ratios by incorporating the spacer-defined double-patterning process with nanoline templates via atom layer deposition (ALD) was demonstrated. A nanoline template can be fabricated readily by pattern transfer from a thin silicon-containing block copolymer film into a thick crosslinked organic polymer layer. The excellent thermal stability of the crosslinked organic template allowed the high-temperature ALD process to deposit the TiO<SUB>2</SUB> thin film conformally on the nanoline template. After the template was removed using dry etching and calcination, a highly crystalline anatase TiO<SUB>2</SUB> nanosheet array with a length of several micrometers was obtained. The thickness of the resulting TiO<SUB>2</SUB> nanosheet could be controlled below half the space of the originally defined nanoline template by incorporating the spacer-defined double-patterning process using ALD. This facile and scalable method could be a useful technique for fabricating ultrahigh-density arrays of various inorganic nanosheets with high aspect ratios.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The etch contrast of PS and PSSi blocks was high enough to etch organic underlayers. </LI> <LI> High thermal stability of the crosslinked template allowed high-temperature ALD. </LI> <LI> TiO<SUB>2</SUB> nanosheet arrays with tunable widths were prepared by controlling the ALD cycle. </LI> <LI> One-step thermal annealing produced crystalline anatase TiO<SUB>2</SUB> nanosheet arrays. </LI> <LI> Sub-10 nm TiO<SUB>2</SUB> nanosheet arrays with high aspect ratios were successfully fabricated. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

RESEARCH ARTICLE: Inheritance and Quantitative Trait Loci Analysis of Resistance Genes to Bruchid and Bean Bug in Mungbean (Vigna radiata L.Wilczek)

( Myon Gi Hong ),( Kil Hyun Kim ),( Ja Hwan Ku ),( Jin Kyo Jeong ),( Min Jung Seo ),( Chang Hwan Park ),( Yul Ho Kim ),( Hong Sik Kim ),( Yong Kwon Kim ),( So Hyeon Baek ),( Dool Yi Kim ),( Su Kwon Pa 한국육종학회 2015 Plant Breeding and Biotechnology Vol.3 No.1

Bruchid (Callosobruchus chinenesis L.) and pod sucking bug (Riptortus clavatus Thunberg) are serious insect pests during the reproduction stage and seed storage period of legume crops worldwide. However, few sources of resistance to each of these insects have been identified and characterized, and no genetic studies have been carried out with simultaneous tests of these two insects. In this study, the inheritance of seed resistance to Callosobruchus chinenesis L. and Riptortus clavatus Thunberg was examined in a mungbean cultivar, Jangan mungbean, which was developed by backcrossing with the V2709 resistant donor. The F1, F2, and F3 seed generations were developed from the cross between susceptible and resistant parents, and evaluated for resistance to the two insects. It was found that resistance to bruchid and bean bug was controlled by a single dominant gene in the F1 and F2 seeds. However, the segregation pattern of reciprocal reaction to each insect in F2 seeds showed seeds were susceptible to each insect. These results suggest that the resistance genes in Jangan mungbean to bug and weevil are either different or closely linked with each other. A genetic linkage map 13.7 cM in length with 6 markers was successfully constructed. Two QTLs were identified for bruchid resistance, and a QTL for bean bug resistance was detected. One of the QTLs for resistance to bruchid was shared with the QTL for bean bug. These newly developed closely linked markers will be used for cloning of the resistance genes to bruchid and bean bug in the future.