한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

선택적 후근절제술의 수술중 근전도 감시방법과 치료효과

김형일,김연희,김완호,김근수,김동찬 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.10

Selective posterior rhizotomy(SPR) has been known to reduce the spasticity as well as to improve the quality of life in patients with intractable spasticity. Twenty patients underwent SPR under intraoperative electrophysiological monitoring(IOM). Fifty-two percent of sacrolumbar rootlet were cut after electrical stimulation. Eighteen patients(90%) with spastic type of cerebral palsy showed marked reduction of spasticity and functional improvement without any complication. The patients who did not respond to SRP had mixed types of spasticity. IOM facilitate the selection of pathological rootlets regardless of anaesthetic level. intensity of electrical stimulation, and individual variability of responses. It is concluded that careful selection of surgical candidates and of pathological rootlets under IOM are important to reduce the spasticity. thereby to obtain a better outcome.

Characterization of Antihypertensive Angiotensin I-Converting Enzyme Inhibitor from Recombinant E. coli

Kim, Jae-Ho,Jeong, Seung-Chan,Lee, Dae-Hyoung,Lee, Jong-Soo 배재대학교 자연과학연구소 2005 自然科學論文集 Vol.16 No.1

안지오텐신(ACE) 저해제는 항고혈 효과를 갖고 있으므로 오랫동안 고혈압의 예방이나 치료에 이용되어 왔다. 본 연구는 재조합 대장균으로부터 새로운 ACE 저해제를 생산하고 정제하며 나아가 이들이 구조-기능 관P를 규명하기 위해 수행되었다. Saccharomyces cerevisiase의 ACE 저해 펩타이드 유전자를 함유하고 있는 재조합 pGEX-4T-3을 대장균 BL21(DE3)로 형질전환 시켰다. 재조합 pGEX-4T-3을 갖고 있는 대장균 BL21(DE3)로부터 생산된 Glutathione-s 전이효소 (GST) 융합 단백질을 얻어서 그중 ACE저해 펩타이드를 Sephadex G-25 컬럼 크로마토그래피로 정제하였다. 정제된 ACE 저해 펩타이드는 타이로신-아스파틱엑시드-그리신-글리신-발린-패닐알라린-아르기닌-발린-타이로신-트레오닌의 서열을 가진 새로운 decapeptide이었고 ACE에 대하여 경쟁적으로 저해하였다. The angiotensin I-converting enzyme (ACE) inhibitor has anti-hypertensive effects and has long been used as prevention or remedy of hypertension. This study were carried out to produce and purify a new ACE inhibitor from recombinant E. coli and further elucidate its structure-function relationship. Recombinant pGEX-4T-3 containing ACE inhibitory peptide gene of Saccharomyces cerevisiae was transformed into E. coli BL21(DE3). Glutathione-S transferase (GST) fusion protein from E. coli BL21(DE3) harboring the recombinant pGEX-4T-3 was obtained and the ACE inhibitory peptide was purified with Sephadex G-25 column chromatography. The purified ACE inhibitory peptide was a novel decapeptide with sequence Tyr-Asp-Gly-Gly-Val-Phe -Arg-Val-Tyr-Thr which shows very low similarity to the other ACE inhibitory peptide sequence. The purified ACE inhibitor competitively inhibited ACE.

고효율 충전탑에서 유해가스처리

김장호,김형호,김종수 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.2

In control technology of green house gas CO₂ exhausted, CO₂recovery by chemical absorption technology is recommended. In application to a power station and industrial field with using the absorbent MEA and AMF for carbon dioxide removal. we used packing tower(D=0.l5m, H=1.05m) for experimental apparatus on the chemical absorbtion being used extensively as recovery technique of CO₂. The pressure drop of structured packing Mellapak N. 250Y and random packing 25mm Pall nng was 5.2, 8.5 [mm H₂O/m in the gas capacity factor [kg^(1/2) m^(-1/2) s^(-1)]. Metallic Ralu-Pack 250YC, however, structured packing. has recently being used in petrochemical production plant in general. The decision of tower height depends on the number of transfer unit(NTU) and HTU influence on liquid distribute. If liquid flow is not good material separation, it is bad and usually occurs in the foolding point. In the normal condition, new systematic understanding is given on metal Ralu-Pack 250 YC.

합성수지 충전물을 이용한 충전탑에서 암모니아 처리에 관한 연구

김장호,김형호,김종수,김재홍,이경재 동아대학교 환경문제연구소 2003 硏究報告 Vol.25 No.2

In this study, packed column was chosen so as to remove ammonia gases, kinds of odor generated from industrial fields. Random packing 35mm Pallring pp., that is suitable for the environmental protection industry, was used because the packings are comparatively simple and easy to manufacture. Random packings 35mm Pallring, PP. has a form of lattice as plastic(po1ypropylene). By studying the characteristics for packing by experiment of dry pressure drop, hydraulic pressure drop, liquid hold-up and mass transfer, packed column is made as 300 [mm] in diameter, 1400 [mm] in height, the applicable criteria to the noxious gas treatment process was presented as follows.

고효율 충전탑에서 MEA 및 AMP 흡수제를 이용한 이산화탄소의 처리

김장호,김형호,강성진,김재홍,이경재 동아대학교 환경문제연구소 2003 硏究報告 Vol.25 No.2

In control technology of green house gas CO₂ exhausted, CO₂ recovery by chemical absorption technology is recommended. In application to a power station and industrial field with using the absorbent MEA and AMP for carbon dioxide removal. we used packing tower(D=0.l5m, H=1.05m) for experimental apparatus on the chemical absorbtion being used extensively as recovery technique of CO₂.

석탄을 원료로한 활성탄 제조와 흡착특성에 관한 연구

최동훈,김형호,김종수,김재홍,김장호 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.2

The purpose of this study is develop manufacture technology of activated carbon for purification of water, it is investigated suitable manufactures for manufacture of activated carbon for purification of water by use anthracite coal and bituminous coal produced in internal and external through this fact, economic valuation and made method established. it is valuated wether or not suitable high degree purification by know removal characteristic organic matter such as KMnO₄Consumption, DOC, UV-254, and THMFP make use of Pilot-plant (purification of water treatment) for made activated carbon. For mixed anthracite coal and bituminous coal by means of coal tar pitch, completely melt to fixed coal tar pitch apply l50℃ heat at stainless steel box, since then compounding weight rate 1:l of anthracite coal and bituminous coal sieved material, then add coal tar pitch and caking water, mixed suitable compounding rate since then extrude and mix by diameter 5.5m extruder, extruded mold cute and dry length l0mm pellet shape by cutter and then made activated carbon.

2축 서보시스템을 위한 위치제어장치 설계

김기택,김형중,장석호 江原大學校 産業技術硏究所 1991 産業技術硏究 Vol.11 No.-

In this study, we design a position controller or two axis servo system.The position controller performs numerical control(NC)to DC or AC servo motor or step motor, and also has a digital input output sequence capability. The control program composed of position and sequence command, which is called channel, is programed easily and user interactivtively. And it is interpreted and the straight line and are position command iinterpolated . We develop the Z80 microprocessor based system and the software with assembly and Clanguage, and also PC based graphic simulator for the debugging and educational purposes.

정양지의 대형수생식물상과 그 분포에 관한 연구

김인댁,박정원,김형오 7개 국립대학교 환경연구논문집 공동발행 위원회 2005 공업기술연구 Vol.5 No.-

The flora(macro-hydrophyte) and Vegetation of Jeongyang reservoir and surrounding area was investigated from March, 2005 to October, 2005. The Macro-hydrophyte of this area consist of 31 taxa : 1 variety, 30 species, 27 genera and 19 family. The Macro-hydrophyte of this area consist of Emergent Plants : 15 species, 12 genera, 8 family, Submerged Plants : 6 species, 6 genera, 5 family, Free-floating Plants : 3 species, 3 genera, 2 family, Folating leaved Plants : 3 species, 3 genera, 3 family, Hygrophytes Plants : 3 species, 3 genera, 3 family, Terrestrial Plants : 1 species, 1 genera, 1 family. The communities of Jeongyang lake : Miscanthus sacchariflorus community, Echinochloa crus-galli var.frumentacea community, Scirpus triqueter community, Ziaznia latifolia community, Phragmites communis community, Typha orientalis community and persicaria thunbergii community. The life form spectrum : Emergent Plants 48%, Submerged Plants 19%, Free-floating plants 10%, Floating leaved Plants 10%, Hygrophytes Plants 10%, Terrestrial Plants 3%.

한국 성인의 측모두부 수평기준선에 관한 연구

김경호,백형선,김진갑 대한치과교정학회 1998 대한치과교정학회지 Vol.28 No.5

교정이나 악교정 수술 환자에서 치료계획 수립과 치료결과의 평가를 위해서 지금까지 많은 수평기준선이 사용되고 있으나 정확성과 재현성 등의 문제가 존재하고 있으며, 더욱 객관적인 수평기준선이 설정될 수 있다면 교정학 분야에서 많은 발전이 기대될 수 있을 것이다. 이에 본 연구에서는 한국 성인의 부정교합군과 성별에 따른 Sella-Nasion(SN) 평면과 Frankfort-Horizontal(FH)평면이 이루는 각도 및 FH평면과 다른 수평면 간의 상관 관계를 조사하기 위하여 먼저 임상검사를 시행하여 총 600여명을 대상으로 측모두부규격 방사선사진을 촬영하였다. 계측결과를 바탕으로 연구대상을 골격성 Ⅰ급 부정교합군 또는 정상교합군(남 50, 여 50), 골격성 Ⅱ급 부정교합군(남 50, 여 65), 골격성 Ⅲ급 부정교합군(남 50, 여50)으로 분류한 후 10개의 항목을 평가하여 다음과 같은 결론을 얻었다. 1. SN 평면과 FH평면이 이루는 각도는 부정교합에 따른 차이는 없었으나 성별 간에는 세 부정교합군 모두에서 차이를 보여 남자는 7.47±2.40˚, 여자는 8.93±2.72˚ 였다. 2. SN 평면 또는 FH 평면과 Mandibular Plane이 이루는 각은 모든 부정교합군에서 여자가 남자보다 컸으며, 골격성 Ⅱ급 부정교합군과 Ⅲ급 부정교합군이 Ⅰ급 부정교합군보다 큰 각도를 나타내었다. 3. FH 평면과 Palatal Plane이 이루는 각은 부정교합군 및 성별에 따른 차이를 보이지 않고 비교적 일정하였다. 4. Gonial angle은 남녀 모두 Ⅲ급 부정교합군이 다른 두 부정교합군보다 큰 각도를 보였다. The purpose of this study was to investigate the angle formed by the Sella-Nasion(SN) plane and Frankort-Horizontal(FH) plane and evaluate the correlation and difference of the FH plane to other horizonatal reference plane. Through this study we hope to present a basis for selecting a horizontal reference plane which can be implemented in cephalometric studies and in surgical orthodontic treatment planning. 600 subjects were chosen following a clinical examination and lateral cephlometric X-rays were taken. According to cephalometric analysis the subjects were classified into 3 groups; Skeletal Class I malocclusion or normal occlusion group(male 50, female 50), Skeletal Class Ⅱ malocclusion group(male 50, female 65) and Skeletal Class Ⅲ malocclusion group(male 50, female 50). The results were as follows. 1. The angle formed by the SN plane and FH plane showed no difference among the malocclusion groups, but there was a significant sex difference. For males the angle measured was 7.47˚±2.40˚ whereas for females it was 8.93˚±2.72˚. 2. The angle formed by the SN plane or FH plane and Mandibular plane was higher in females for all malocclusion groups. This angle in the Skeletal Class I malocclusion group was lower than in the other two groups. 3. There was no difference among the sexes or malocclusion groups considering the angle formed by the FH plane and Palatal plane. 4. The gonial angle in the Skeletal Class Ⅲ malocclusion group was higher than in the Skeletal Class I and Class Ⅱ malocclusion groups in both sexes.