VDT작업별 정신사회적 스트레스와 근골격계 장애에 관한 연구

백남종,강종두,주영수,배인근,권호장,박종만,조수헌,김돈규,김재용,최홍렬 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.4

It has been hypothesized that jobs that have both high psychological demands and low decision latitude("job strain") can lead to musculoskeletal disorder. The objective of this study was to test whether job strain was correlated with the presence of work-related musculoskeletal disorder, especially myofascial pain syndrome(MPS). Information on demographic factors, confounders such as household load and taking care of children or not, and scores for decision latitude, job demand, and social support was obtained by self-administered questionnaire, which had been developed in Korean language, by adopting NIOSH instrument and Extended Karasek Model(16 items). All subjects were also examined by rehabilitation medicine specialists for musculoskeletal disorders. Subjects(n=370) could be categorized into 4 groups, these were, housewives(n=89), shipyard CAD workers(n=89), general female workers(n=79; nurses, insurance counselors, public officials, clerks, etc), and telephone directory assistance operators(n=113). Results from univariate analyses indicated that all demographic factors, all confounders, scores for decision latitude and social support were not associated with the risk of musculoskeletal disorder. However, score for job demand was higher in musculoskeletal disorder cases than others. In subgroup analysis, this association was convinced again, in telephone directory assistance operators. Job strain model showed that the group of telephone directory assistance operators was high-stain group, and OR of musculo skeletal disorder was 2.446(95% C. I. : 1.174, 5.096), when comparing this with the low strain group. In conclusion, job strain is a risk factor for work-related musculoskeletal disorder.

제주도 문섬 산호서식지 주변의 생물생태학적 특성 Ⅱ. 식물플랑크톤의 군집동태와 1차생산력

이준백,좌종헌,강동우,고유봉,오봉철 제주대학교 방사능이용연구소 2000 연구보고 Vol.14 No.-

Community dynamics of phytoplankton and primary productivity have been investigated bimonthly from February 1997 to December 1997 in the coastal area around Moonsom of the southern Cheju Island, which is well-known for soft coral habitats in Korea. Average water temperature was 18.5℃ , being stratified from May to September by the seasonal thermocline, while vertically homogeneous in the winter. Euphotic depths ranged from 18.9 m to 45.9 m (average 33.7 m). Chlorophyll α concentrations varied from 0.02 to 0.92 ㎍ · ℓ-1 Standing crops of phytoplankton ranged from 2×103 to 3.9×105 cells · ℓ-1, showing a peak only in the spring. Diatoms occupied 67.5% of the total standing crops, while phytoflagellates, dinoflagellates and others 24.3%, 7.1% and 1%, respectively. However phytoflagellates and dinoflagellates were predominated with 36.6% and 38.7% in June, respectively. There was four dominant species in the study area. Chaetoceros sociales Lauder was dominant species from December to April, Prorocentrum micans Ehrenberg in June. In August, Chaetoceros socialis Lauder dominated in inshore but Paralia sulcata (Ehrenberg) Cleve in offshore. In October, Skeletonema costatum (Greville) Gran dominated the whole area. Daily primary productivity varied from 32.3 to 364.9 mg C · m-2 . day-1 (average 180.7 mgC · m-2 . day-1). Contribution of nanoplankton (<20 ㎛) to daily primary productivity was very high, accounting for 28.0-82.8%. Annual primary productivity is estimated 65.97 gC · m-2 ·yr-1, which is lower than those of the coast of Yellow Sea and the southern waters. Nanoplankton seemed to adopt higher irradiances with Ik values of 190-1,000 □· m-2·s-1 (mean 526.7 □ · m-2·s-1) than total phytoplankton with 140-850 □ ·m-2·s-1 (mean 466.7 □· m-2·s-1).

제주도 한림항과 성산항 일대 식물플랑크톤의 군집동태

이준백,좌종헌 濟州大學校海洋硏究所 1990 해양과환경연구소 연구논문집 Vol.14 No.-

제주도 동ㆍ서 연안역의 식물플랑크톤 군집동태 및 환경요인과의 상관관계를 비교 파악하기위해 한림항과 성산항 주변해역의 정점을 중심으로 1989년 8월부터 1990년 5월까지 매월 조사를 실시하였다. 두 항만 해역에서 공통으로 출현한 종의 비율은 49.2%로써 종조성에서 차이를 보였으나 Skeletonema costatum, Chaetoceros socialis 등이 두 해역에서 공통적으로 춘계에 75% 이상의 높은 점유율로 우점하고 있었다. 현종량은 한림항에서3,277∼1,952,809, 성산항에서 6,458∼1,799,870 cells/ℓ분포를 보였지만, 대중식의 양상은 한림항은 춘계에 성산항은 추계에 발생하여 계절적으로 다른 양상을 보였다. C-4 법에 의한 일일 기초생산량은 한림항이 0.768∼3.119, 성산항이 0.533-5.889 ㎎ C/㎥/day로 성산항이 높았으며 탄소동화율도 성산항이 한림항 보다 높은 값을 나타내었다. 식물플랑크톤과 환경요인과의 상관관계는 한림항은 수온, 용존산소, 총질산-질소(r²=0.467), 그리고 성산항은 염분, 용존산소, 총인산-(r²=0.492)의 영향을 받고 있었다. 요인분석에 의한 두 해역의 생태적 특성은 모두 수온의 증가 및 영양염류의 유입과 그로인한 식물플랑크톤의 증가로 나타났다. The phytoplankton dynamics and correlations between phytoplankton community and environmental factors in the western and eastern area of Cheju Island have been monthly investigated at eight stations of Hanrim harbor and nine stations of Songsan harbor from August,1989 to May, 1990. The ratio of common species occurred at two areas was 49.2%, showing the diffrence in species composition. The dominant species, however, of Skeletonema costatum and Chaetoceros socialis, comprised more than 75% commonly at two areas in spring season. Phytoplankton standing crops have showed the ranges of 3,277∼1,952,809 and 6,458-1,799,870 cells/ℓ at Hanrim and Songsan respectively, blooming in sping at Hanrim and in fall at Songsan. Daily primary production using C-14 method ranged 0.768∼3.119 and 0.533-5.889 ㎎ C/㎥/day at Hanrim and Songsan respectively, and carbon assimilation number at Songsan has showed higher than at Hanrim as well. The correlations between phytoplankton and environmental factors suggest that water temperature, dissolved oxygen and total nitrate-nitrogen affected the phytolankton standing crops(r²=0.467) at Hanrim, whereas salinity, dissolved oxygen and total phosphate-phosphorous affected it(r²=0.492) at Songsan. From factor analysis, it is speculated that the ecological characteristic of two survey area is phytoplankton blooming by the increase of water temperature and the inflow of nutrients.

제주도 한림항과 성산항 일대 식물플랑크톤의 군집동태

이준백,좌종헌 제주대학교 해양연구소 1990 해양자원연구소연구보고 Vol.14 No.-

濟州道 海岸線周邊 附着硅藻類의 種組成 및 分布

李埈伯,左宗憲,金日洙 濟州大學校海洋硏究所 1991 해양과환경연구소 연구논문집 Vol.15 No.-

제주도 해안선주변 부착규조류의 종조성 및 분포를 조사하기 위해 1991년 4월부터 1991년 6월사이에 4개의 해안역 정점에서 실시하였다. 조사기간 중 채집된 부착규조류는 총 71종으로 11과, 32속, 59종, 12미동정종으로 구성되어있으며, 전 해안에서 출현한 부착규조류중 점유율이 20% 이상되는 우점종은 모두 12종이었다. 전 정점 및 전 부착기질에서 관찰된 Cocconeis scutellum, Cylindrotheca closterium, Licmophara abbreviata 등은 50% 이상의점유율을 보여 본 연구를 통하여 조사된 부착규조류중 가장 대표적인 우점종이라 할 수 있다. The distribution and species composition of periphtic diatoms around the coast line of Cheju Island have been investigated at four costal stations from April 1991 to June 1991. During the study period, 71 taxa periphytic diatoms are collected, of which are composed of 11 famillies, 32 genera, 59 species, 12 unidentified species. More than 20% of periphytic diatoms are occupied by the 12 abundant species. Coccneis scutellum, Cylindrotheca closterium, Licmophara abbreviata are observed in all the coasts and all the attached substratum, and predominated more than 50% so that these species are the moat typical dominant species troughout the study period.

Role of TSH as Diagnostic and Therapeutic Index of Hypothyroidism in Nephrotic Syndrome patients

( Jong-hun Baek ),( Dae-woong Kang ),( Byung-chul Shin ),( Jong-hoon Chung ),( Hyun-lee Kim ) 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.-

The Impact of Transactional and Transformational Leadership on Organizational Commitment in Major League Baseball

Baek, Jong-Hun(백종훈) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.1

이 연구의 주된 목적은 미국 메이저리그 베이스볼 조직 내에서의 리더십 행동유형과 조직 몰입도와의 관계를 조사하는 것이다. 더 자세히 말하자면, 베이스볼 조직의 비지니스 관련 최고 경영자의 변혁적, 거래적 리더십이 각 산하부서의 부서 책임자들의 조직 몰입도에 끼치는 영향 관계를 분석하였다. 총 162명의 산하부서 책임자들이 이 연구에 참가하였고, 연구를 위한 자료는 우편을 통해 수집되었다. 연구를 위해 사용한 설문지는 Multifactor Leadership Questionnaire (MLQ), Organizational Commitment Questionnaire (OCQ), 그리고 간단한 개인 신상 정보에 관련된 문항들로 이루어졌다. 이 연구를 통해 도출된 주요결과는 다음과 같다: 최고 경영자의 변혁적 리더십 행동과 산하부서 책임자들의 조직 몰입도 간의 관계는 통계적으로 유의하였으며, 최고 경영자의 거래적 리더십 행동 또한 산하부서 책임자들의 조직 몰입도에 통계적으로 유의한 관계를 보였음이 회귀분석을 이용한 설문지 자료 분석을 통해 밝혀졌다. 특히 주목할 점은 최고 경영자의 변혁적, 거래적 리더십 행동을 통합하였을때, 그 리더십 행동이 산하부서 책임자들의 조직몰입도에 통계적으로 가장 유의한 영향을 끼치는 것으로 나타났다.

Concurrent Immune thrombocytopenic purpura and Gullian-Barre syndrome

( Jong Hun Baek ),( Chi Young Park ),( Choon Hae Chung ),( Sang Gon Park ) 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.-

Concurrent Immune thrombocytopenic purpura and Gullian-Barre syndrome

( Jong Hun Baek ),( Chi Young Park ),( Choon Hae Chung ),( Sang Gon Park ) 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.1

Immune thrombocytopenic purpura (ITP), Gullian - Barre syndrome (GBS) are autoimmune disorders caused by impaired self tolerance mechanism triggerd by interaction between Genetic and enviromental factors. ITP is an immune -mediated destruction of platelets resulting in mucocutaneous bleeding, GBS is an ascending motor paralysis caused by an inflammatory demyelination of peripheral nerves, concurrnet ITP and GBS has rarely repoted. 64 year-old patient complained both upper and lobwer extremity symmetric weakness. On admission, basic laboratory studies revealed thrombocytopenia (21.000/μl). other viral lab was all negative. patients had no drug history and autoantibody was all negative. Bone marrow examination showed normal cellularity without dysplasia. ITP and GBS was diagnosed. Oral Predinisone and Intravenous immunoglobulin was initated for ITP and GBS. pateints symptom was improved and Platlet count promptly elevated, too We present a rare case of concurrnet ITP and GBS patient, who was recovered completely by IVIG and Predinison.

Role of TSH as Diagnostic and Therapeutic Index of Hypothyroidism in Nephrotic Syndrome patients

( Jong Hun Baek ),( Dae Woong Kang ),( Byung Chul Shin ),( Jong Hoon Chung ),( Hyun Lee Kim ) 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.1

Background: In patients with a nephrotic syndrome, urinary losses of thyroid hormone and thyroid-binding protein are known to be associated with developing of hypothyroidism. However, a limited number of studies have reported accurate prevalence and relating factors of overt or subclinical hypothyroidism in nephrotic syndrome patients. Methods: In this study, retrospectively, we evaluated 79 patients were diagnosed nephrotic syndorme in Chosun University Hospital with thyroid function test. Result: There were 43 males and 36 females of 79 patients. Mean age was 49.9 years old. Serum creatinine concentration was 1.57 mg/dL and mean TSH level was 4.037 μIU/mL. The prevalence of subclinical hypothyroidism was 16.5% (13/79), over hypothyroidism was 13.9% (11/79) and euthyroidism was 69.6% (55/79). Serum albumin was significantly lower in the hypothyroidism patients compared with euthyroidism patients (p<0.05). 24hr proteinuria amount was lower in hypothyroidism patients than euthyroidism patients but no statistical significance (p>0.05). TSH was negatively correlated with serum albumin (r=-0.430, p<0.002) and positively correlated with 24hr urine protein amount (r=0.396, p<0.01) and 24hr albumin amount (r=0.340, p<0.01). We observed that TSH level was significantly normalized after 24hr proteinuria amount was controlled to normal range (p<0.05). Conclusion: Our study shows that the incidence of overt hypothyroidism was highly 13.9% and TSH level is a useful index in diagnosis and treatment of hypothyroidism in nephrotic syndrome patients.