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.

알코올이 Dynamic Posturography에 미치는 영향

이진춘,고의경,장민호,이병주,백무진,노환중,왕수건,전경명 대한이비인후과학회 1999 대한이비인후과학회지 두경부외과학 Vol.42 No.2

Guillain-Barre^(´) 증후군의 뇌척수액 소견에 관한 연구

노재규,명호진 최신의학사 1984 最新醫學 Vol.27 No.5

비흡연자의 Nicotine에 대한 노출량과 뇨중 Cotinine 농도의 상관성에 관한 연구

노진호,신동천,김종만,정용 한국환경독성학회 1990 환경독성보건학회지 Vol.5 No.2

Smoking damages nonsmoker's health who have been exposed to passive smoking as well as smoker's own health. Passive smoking can cause serious health damage to particular groups, such as the old aged, children and pregnant women. The purpose of this study is to investigate the relationship between nicotine concentrations in environmental tobacco smoke (ETS) and urinary cotinine concentrations of nonsmokers exposed to ETS, and to provide basic information related to health risk assessment. The results of this study were summarized as follows: 1. When 180 cigarrette were smoked during 5 hours (high concentrations exposure) in 132 m³ chamber, mean concentrations of nicotine in ETS showed 263.52㎍/m³±51.93. When 45 cigarretts were smoked (low concentrations exposure), it was 69.43±8.96㎍/m³. 2. The urinary cotinine concentrations of each times (0, 2.5, 5, 17 and 24 hours) in nonsmokers ranged from 0.27~12.52ng/ml in high concentrations exposure and 0.22~2.28ng/ml in low concentrations exposure. Mean while the total urinary cotinine concentrations during 24 hours ranged from 11.62~31.65㎍/ml in high concentrations exposure and 3.45~5.64ng/ml in low concentrations exposure. 3. The correlation equation and coefficient between cotinine concentrations in nonsmokers' urine(y) and nicotine concentrations in ETS(x) was y=0.421+0.0171x and 0:875 (p<0.01) respectively. 4. The quantity of nonsmokers' smoking exposure by passive smoking can be assumed as based on the estimation of nicotine concentrations in ETS by measuring cotinine concentrations of nonsmokers' urine.

정의적 특성이 수학적 문제 해결력에 미치는 영향

강호욱,노은환,박은진,송현준,이혜경,주채연 진주교육대학교 초등교육연구소 2005 科學敎育硏究 Vol.28 No.-

The purpose of this study is to provide some basic data which can be helpful for improving the methods of mathematics teaching-learning emphasizing the affective factors by investigating the effect on affective characteristics and mathematical problem solving ability of the students on the elementary school sixth grade. In order to achieve these purpose, the following research problems were set up for the present study: The results of this study are as follows: First, it was appeared that there was not any difference on attitude on mathematics, belief, self-confidence and the degree of mathematical problem solving ability by sex. Second, it was appeared that there was some statistical meaningful difference on attitude on mathematics, belief, self-confidence and the degree of mathematical problem solving ability according to high middle low ability on mathematics which the students think that they have. Based on the results of this study, I'd like to give some suggestions as followings to provide some help to teaching and learning mathematics. First, the succeeding studies are needed by selecting different population from the population of this study, classifying low-ranking factors consisting of affective characteristics differently from this study, compounding each low-ranking factors in various manners like using new items, etc. Second, the succeeding studies are needed in this part, because what mathematical belief teachers have mathematics can have an effect on students' mathematical belief and action as well as on teachers' thinking process and action in the class. Third, the succeeding studies are needed to develop concrete field study and program which can be helpful for improving actually students' affective behavior characteristics in school field.

정보 검색 시스템의 색인에 여러개 정보를 효율적으로 추가하기 위한 새로운 전략

김진호,노희영,김주영,김상욱 강원대학교 정보통신연구소 1998 정보통신논문지 Vol.2 No.-

?? -tree is widely used as index structure in information retrieval system such as digital library and World-Wide Web information retrieval engine. The Information retrieval ststem often reflect all information collected independently by robot agent into their current indexes and directories at one time. When many key values are inserted into an index implemented as ?? -tree, much processing time will be required to search and to split nodes to look for the leaf nodes inserted. In order to Solve this problem, in this paper, we propose BULK_ADD strategy which creates a new ?? -tree by merging the existing ?? -tree and the set of data to be inserted. We also analyze performance of proposed BULK-ADD strategy. From the performance analysis, we found that the proposed strategy has better performance than the algorithm which inserts repeatedly into ?? -tree, when the nember of inserted data objects is over specific ratio(4%) of the existing index size. This ratio can be used as the criteria selecting the scheme to insert multiple data objects into ?? -tree with the minimum processing time in information scheme to insert multiple data objects into ?? -tree with the minimum processing time in information retrieval systems. At the same time, the period of index update can be determined on the basis of this ratio, if we can predict the data quantity newly collected during a specific time interval.

생산전략에 의한 기업성과에 관한 실증적 연구

이성호,오영진,박노국 尙志大學校 生産技術硏究所 1997 生産技術論叢 Vol.- No.1

The growth and survival of a business depend upon its proper strategic capability against the rapid change in environment. The business that well accommodates the changing environment and properly uses the resources will continue its growth. The problems in accommodating business environment are how to focus the limited corporate strategy on certain point. This study analyzed the performance of corporate and lower level functional strategy to produce the competitiveness of manufacturing company and to recommend the corporate strategic directions from the results. Consequently, business competitiveness depends upon how a business consistently precedes the alternatives of corporate strategy and the focused factory strategy. Therefore, top management should pay attention to the focused factory in product manufacture.

GC/MS-SIM과 ³²P-postlabeling방법에 의한 염료와안료를 제조하는 사업장 근로자들의 방광암 조기발견을 위한 Biomarker개발에 관한 연구

이진선,신호상,김양호,노재훈,이범규 공주대학교 자원재활용신소재지역협력센터 2000 2차년도 센터 사업 성과집 Vol.2000 No.1

To develop the biomarker of non-invasive biomonitoring among workers who exposed benzidine-based dyes in its manufacturing and treating industries, we examined and evaluated the specific carciaogen-DNA adducts in exfoliated urothelial cells of 33 exposed workers. Samples were collected from urine of workers, and then isolated DNA from them. DNA adducts were analyzed using 32P-postlabeling, along with Nuclease P1. One adducts was predominated in those samples with 6 adducts present. It was formed in all exposed workers, but the others not. Its relative adducts level(RAL) was 73.2×107, which was statistically significantly higher than any other adducts' level(p<0.05). Analyzing regression between its RAL and employment period of workers, simple linear regression was positively increased with slop of 6.922(p<0.05, r2=0.548). And also, DNA adducts were analyzed using GC/MS-SIM, along with n-butanol extraction and trifluoroacetyl auhydride(TFA) derivatization. Standard material was synthetic N-(deoxyguanosin-8-yl)-N'-acetylbenzidine. The characteristics of sample and standard were observed on the same sites, such as M+(m/z 376) and M+(m/z 279) for benzidine-di-TFA and mono-TFA. And then, they were confirmed by analyzing with secondary ion mass(SIM). This study showed that benzidine-based dyes was formed one DNA adduct into significantly high levels in bladder of all exposed workers, its chemical formula was N-(deoxyguanosin-8-yl)-N'-acetylbenzidine. So we can do monitoring the workers with exfoliated urothelial cells of them by analyzing above DNA adduct as biomarker for preventing bladder cancer causing the exposure of the benzidine-based dyes.

미세-전단 결합 강도 시험을 이용한 상아질 접착제와 수복용 복합 레진의 호환성에 관한 연구

정진호,노병덕 大韓齒科保存學會 2004 Restorative Dentistry & Endodontics Vol.29 No.4

The purpose of this study was to compare and to evaluate the combination use of 5 kinds of dentin adhesiye systems and 5 kinds of composite resins using micro-shear bond test. Five adhesive systems (Prime & Bond NT (PBN), Onecoat bond (OC), Excite (EX), Syntac (SY), Clearfil SE bond (CS)) and five composite resins (Spectrum (SP) Synergy Compact (SC), Tetric Ceram (TC), Clearfil AP-X (CA). Z100 (Z1)) were used for thing study (5×5 = 25group, n = 14/group). The slices of horizontally sectioned human tooth were bonded with each bonding system and each composite resin, and tested by a micro-shear bond strength test. These results were analyzed statistically. The mean micro-shear bond strength of dentin adhesive systems were in order of CS (22.642 Mpa), SY (18.368 MPa), EX (14.599 MPa), OC (13.702 MPa), PBN(12.753 MPa). The mean bond strength of self-etching primer system group (CS, SY) in dentin was higher than that of self-priming adhesive system groups (PBN, EX, OC) significantly (P<0.05). The mean bond strength of composite resins was in ordel of SP (19.008 MPa), EA (17.532 MPAa), SC (15.787 MPa), TC (15.058 MPa), Z1 (14.578 MPa) Micro-shear bond strength of SP was stronger than those of other composite resins significantly (P < 0.05). And those of TC and Z1 were weaker than other composite resins significantly (P < 0.05). No difference was found in micro-shear bond strength of composite resin in self-etching primer adhesive system groups (CS, SY) statistically. However, there was significant difference of micro-shear bond strength of composite resin groups in self-priming adhesive systems group (PBN, EX, OC). The combination of composite resin and dentin adhesive system recommended by manufacturer did not represent positive correlation. It didn't seem to be a significant factor.

약물의 in vitro 투과 실험을 위한 사람의 비강점막상피세포 단층막의 일차배양

유진욱,김유선,이민기,노환중,이치호,김대덕 한국약제학회 2002 Journal of Pharmaceutical Investigation Vol.32 No.1

The primary culture of human nasal epithelial cell monolayer was performed on a Transwell. The effect of various factors on the tight junction formation was observed in order to develop an in vitro experimental system for nasal transport studies. Human nasal epithelial cells, collected from human normal inferior turbinates, were plated onto diverse inserts. After 4 days, media of the apical surface was removed for air-liquid interface (ALI) culture. Morphological characteristics was observed by transmission electron microscopy (TEM). A polyester membrane of 0.4 μm pore size was determined as the most effective insert based on the change in the transepithelial electric resistance (TEER) value as well as the ^14C-mannitol transport study. The ALI method was effective in developing the tight junction as observed in the further increase in the TEER value and reduction in the permeability coefficient (P_app) of ^14C-mannitol transport. Results of the transport study of a model drug, budesonide, showed that the primary culture system developed in this study could be further developed and applied for in vitro nasal transport studies.