8년간(1992~1999) 산업안전보건연구원에 의뢰된 직업병 심의 사례 분석

강성규,김규상,김양호,최정근,안연순,진영우,최병순,양정선,김은아,채창호,최용휴,김대성,박정선,정호근 대한산업의학회 2000 대한직업환경의학회지 Vol.12 No.2

Objectives : Pneumoconisis and noise-induced hearing loss (NIHL) have been reported as main occupational diseases by the Special Health Examination. The Industrial Accident Compensation Insurance has reported various work-related diseases, however, these two diseases occupied almost a half of compensated cases. Therefore, it was not well known about the status of occupational diseases other than pneumoconiosis, NIHL, and cardio-cerebrovascular accident (CVA). This study was conducted to analyze claimed cases as an occupational disease, that was requested to the Korea Industrial Safety and Health Agency (KOSHA). Methods : The local office of the Korea Labor Welfare Corporation (KLWC) has asked the KOSHA for confirmation of claimed cases as an occupational disease. We analyzed 379 cases requested from KLWC, the Ministry of Labor, employers, unions and occupational health agencies from 1992 to 1999. Results : Male was 80.7 % of the requested cases. Their mean age was 42 years old and 75.5 % of them were more than 35 years old. The requested cases were increased rapidly from 25 cases in 1992 to 108 cases in 1999 and the accept rate was 50.7 %. The majority of requested cases were respiratory diseases(22.4%), cancers(18.5%), Neuropsychiatric problems(14.5%), and musculoskeletal problems(13.5%). The accept rate was high in reproductive, respiratory, musculoskeletal and digestive disorders and low in neuropsychiatric, renal and otologic problems and occupational cancers. 73.6% of them were caused by chemical agents, especially 28.5 % were by organic solvents. 67% of them were clinically confirmed at university hospitals. A half of the cases were from KyongIn area, even the request came from the whole country. Conclusions : A claim was common in workers whose age was over 35 years old and exposure history was over 10 years. The respiratory diseases and neuropsychiatric disorders were still main problems in occupational health and occupational cancers was increasing even though its accept rate was not high yet.

키넥트 센서를 이용한 고령자 대상의 선자세 균형능력 평가

양승태(Seung-Tae Yang),강동원(Dong-Won Kang),서정우(Jeong-Woo Seo),김대혁(Dae-Hyeok Kim),김태호(Tae-Ho Kim),최진승(Jin-Seung Choi),탁계래(Gye-Rae Tack) 대한전기학회 2017 전기학회논문지 Vol.66 No.2

Portable low-cost Kinect sensor was used to analyze standing balance ability of the elderly. Eighty subjects who can walk alone and have a normal cognitive level participated in this experiment. Based on Berg Balance scale (BBS) test with 52 points, subjects were divided into Healthy older (HO: 46 persons, BBS: 53.80 ± 1.19) and Impaired older (IO: 34 persons, BBS: 49.06 ± 2.03) group. Each subject performed 30 seconds four different standing balance tests (EO: Eyes Open, EC: Eyes Close, EOf: Eyes Open on foam, ECf: Eyes Close on foam). Five variables (Mean distance, Range of distance, Root mean square, Mean velocity, 95% ellipse area) were calculated from the hip joint center movement of Kinect sensor. Results showed that there were significant differences between groups for four different standing tests. Calculated variables from kinect sensor showed significant correlation with BBS score. Especially, mediolateral mean distance, mediolateral root mean square, mediolateral range of distance and 95% ellipse area showed discriminative ability for all tests. Mean values of variables of IO were higher than those of HO, which means the decreased balance ability in IO compared with HO. Therefore, it was possible to estimate simple balance assessment of the elderly using portable low-cost Kinect sensor.

5년간 특수건강진단기관 분석정도관리 결과 분석

강성규,양정선,이미영,박인정,정호근 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.1

목 적 : 1980년대 후반부터 산업보건에서 혈중 및 요중 중금속농도 분석의 정확성 문제가 크게 부각되었다. 같은 시료를 가지고 분석기관마다 보이는 커다란 오차로 인해 직업병 진단 결과에 대한 신뢰성을 크게 감소시켰다. 이에, 노동부에서는 1992년부터 특수건강진단 기관에 대한 생체시료 분석정도관리 프로그램을 시작하였다. 본 연구는 1995년부터 시작된 생체시료 분석정도관리 5년간의 결과를 보고하고, 현재 생물학적모니터링으로 사용되는 항목과 빈도를 조사하고 이 항목의 정도관리 참여율을 비교하여 산업보건 관계 연구나 직업병 관리에 참고할 수 있도록 하기 위해 실시하였다. 방 법 : 생체시료 분석정도관리는 무기와 유기분석분야로 나누어 일년에 전후반기 2회 실시하고 있으며, 지정항목과 자율항목으로 구분하고 있다. 지정항목인 혈중 납과 요중 마뇨산은 분야별로 한 번에 3개 농도수준을 주어 2개 이상이 기준값의 ±15%내외의 범위에 들면 적합한 것으로 판정하고 있으며, 자율항목은 2개의 시료를 주어 2개 모두 기준실험실 평균값의 ±3SD 내외의 범위에 들면 적합한 것으로 판정하고 있다. 결 과 : 지정항목인 혈중 납과 요중 마뇨산 분석은 평균 적합률이 각각 89%, 90% 이었고, 대학기관, 비영리법인, 종합병원, 사업장 자체기관별로 차이는 없었으나 신규 기판의 적합률 70% 수준으로 상대적으로 낮았다. 자율항목의 적합률은 평균 50% 수준이었고, 저농도보다는 고농도의 적합률이 떨어졌다. 국내에서 가장 많이 분석되고 있는 항목은 요중 마뇨산과 혈중 납이었고, 혈중 및 요중 망간도 많이 분석되고 있었다. 요중 삼염화물, 페놀, 만델산, 카드윰, 메칠마뇨산, 크롬 등도 많이 분석되고 있는 항목이었다. 혈중 망간, 요중 수은, 요중 NMF는 정도관리에서 적합판정을 받은 기관의 숫자보다 실제 분석을 하고 있는 기관의 숫자가 많았다. 결 론 : 지난 5년간의 생체시료 분석정도관리 결과 우리나라 분석실험실의 분석능력은 향상되고 있으나, 자율항목에 대한 분석능력은 아직 미흡한 것으로 나타났다. 그리고, 아직 일부 일부 항목에 대해서는 외부 정도관리 없이 분석되고 있는 경우도 있었다. Objective : The accuracy of analytical results of blood and urine heavy metals came out to the main issue on occupational health from late eighties. The discrepancy of the results for same samples from different laboratories made the diagnosis for occupational diseases be unreliable. Therefore, a quality control program for analysis of samples taken from workplace had been introduced in Korea since 1992. This study aims to show the quality control program for analysis of blood and urine samples and its proficient rates from 1992 to 1999 and to know how they have been being used in occupational health. Methods The quality control program runs twice a year with mandatory items of blood lead and urine hippuric acid and voluntary items of blood cadmium and manganese and urine mandellic acid and methyl hippuric acid. Participant laboratories are receiving three levels for each items and two out of three samples have to be qualified for being a profi-cient laboratory for the item. The acceptable range of blood lead and urine hippuric acid is ± 15% and that of the others is within 3 SD (standard deviation) from the reference values. Results : The proficient rates of blood lead and urine hippuric acid was 89%, 90%, repectively, however those of the other voluntary items have been from 51% to 62%. The proficient rates of urine mercury and urine N-methylformamide (NMF), which are introduced since 1999, were very poor. Urine hippuric acid and blood lead were analyzed frequently for the purpose of biological monitoring conducting by special health examination organizations. Urine and blood manganese and urine metabolites of trichloroethylene, urine phenol, methylhippuric acid and cadmium were followed. Conclusions : In conclusion, the quality control program for biological monitoring has dramatically improve the ability of analysing blood and urine samples and eventually con-tributes to diagnose occupational diseases and to prevent occupational poisoning. However, some biological monitoring data, such as urine manganese, mercury and NMF, have been still reported from laboratories that were not accepted as a proficient laboratory.

중합효소연쇄반응을 이용한 구강내 Helicobacter pylori의 검출

양춘호,김강주 원광대학교 생체재료·매식연구소 1999 원광생체재료·매식 Vol.8 No.1

Many authors hypothesised that Helicobacter pylori, a causative agent of gastic disease, might act as a potential antigen in salivary glands. H. pylori has been suggested to be transmitted via oral cavity. To investigate the transmission of H. pylori in oral cavity, saliva samples were taken from the patients with gastric disease. Total DNA was isolated from the saliva samples amliffication of H. pylori urease gene fragment was performed by polymerase chain reaction (PCR) with the isolated DNA as template. The amplified DNA fragments were sequenced by automatic DNA sequencer. Biopsy material from cases 2 patient of CLO test-postitive with gastric disease were examined and photographed using a light and a electron microscope. PCR-amplified DNA fragments were obtained from seven of 42 patients. The nucleotide sequence of PCR products showed high homology with H. pylori 26695 urease (98%), and the deduced amino acid sequence was identical to the urease α subunit of H. pylori J99. The cytosine in the 272th position of urease A nucleotide sequence showed the tendency of high prevalence in the patient with healthy periodontium. Electron micrograph showed helical cell profile of H. pylori on surface epithelial lining cells. Hence, these results suggest that there might be a transmission of H. pylori via saliva.

針葉樹材의 南洋闊葉樹 문틀材 代替 可能性 調査

姜琥陽,張相埴,李華珩 충남대학교 농업과학연구소 1994 농업과학연구 Vol.21 No.2

Since the supply of the Southeast Asian tropical timber decreases and its price steeply increases in the international lumber market, door and window frame manufacturers in this country are eagerly searching for their substitutes. This is the first step to replace Southeast Asian tropical timber by low grade North American softwoods. whose reliable and steady supply is expected, but their appearances are not as good as the tropical timber. In this study, knot distribution on the softwood boards and their warp were examined. The yield and production cost were calculated. The average number of knots on a door frame were 7.2 for Douglas-fir and 3.4 for Western hemlock. Only 11% of the knots of Douglas-fir door frames are larger than 5cm in diameter, while are 35% of the knots of Western hemlock. The deformations of door frames, after 2 months air-drying, were measured with a warp table. The deformation, of Western hemlock door frames were mostly less than 6mm, while those of Douglas-fir distributed in the range of 0.5 and 9.5mm. The yield of Western hemlock is higher than that of Douglas-fir. It can be concluded that the door frames made of the softwoods are compatible with those made of the tropical timber in most aspects except appearance.

은사시나무 판재의 열기건조, 고온건조, 마이크로파-진공 건조

姜琥陽 한국목재공학회 2003 목재공학 Vol.31 No.4

국내에 많이 조림되어 없는 은사시나무(Populus alba×P.glandulosa)의 효율적인 건조를 위해 기본적인 물리적 성질을 조사하였다. 캠퍼스에서 벌채한 원목을 32 mm판목 판재로 제재하여 관행열기건조(저온건조). 고온친조, 마이크로파-진공(MW/V)간조의 3가지 방식으로 건조하여 건조속도, 건조결함, 길이방향 수분경사, 색상 등을 비교하였다. 평균생재비중(전건무게-생재부피 기준)은 0.349±0.074였으며, 심재의 생재함수율은 200% 내외, 변재는 100%내외로 심재 함수율이 더 높았다. 생재에서 전건까지의 수축율은 방사방향과 접선방향이 각각 2.4%와 7.3%였으며 심ㆍ변재간 차이는 없었다. 생재에서 함수율 10%까지 건조시간은 컨디쇼닝시간을 제외하고 저온건조는 65시간, 고온건조는 35시간, MW/V 건조는 22시간이었으며, 건조목 표면을 색차계로 조사한 결과 MW/V 건조 판재의 색상이 가장 밝고 깨끗하였다. Flat-sawn 32㎜-thick boards of Populus alba×P. glandulosa, one of major plantation species in this country, were dried in conventional, high-temperature and microwave-vacuum (MW/V) kilns. The average green specific gravity of the specimens used in this study was 0.346±0.074. Their average green moisture contents of heartwoods and sapwoods were around 200% and 100%, respectively. From green to oven-dry they shrunk 2.4 and 7.3% in radial and tangential directions, respectively, and there was no discrepancy between heartwoods and sapwoods. It took 65, 35 and 22 hours to dry from green to 20% moisture content in conventional, high-tempoeature and MW/V kilns, respectively. A colorimetry study showed that the surface color of the specimens dried in a MW/V kiln was clearer and lighter than those in other kilns.

우리나라 카드뮴 폭로 근로자들의 혈중, 요중 카드뮴과 누적폭로 추정량에 따른 신장장해 평가

강성규,양정선,김기웅,장재연,정호근 大韓産業醫學會 1995 대한직업환경의학회지 Vol.7 No.1

88 workers exposed to cadmium were examined at the 12 factories using or producing cadmium in order to know the present state of cadmium exposure and renal dysfunction in 1992. Cadmium in blood and in urine were measured and compared by the 3 exposure level of cadmium in air. Cadmium in blood of low, moderate and high exposure group were 2.5, 3.8 and 7.6 ㎍/L, respectively. Cadmium in urine were 1.8(1.3), 3.8(2.6) and 7.9 ㎍/L(6.1 ㎍/g creatinine), respectively. However, there was no relationship between urinary cadmium and β₂-microglobulin. Cumulative exposure estimate(CEE) was calculated by multiplying the mean ambient cadmium level of the factory and working duration. CEE has a high correlation with cadmium in blood and urine, but no relation to β₂-microglobulin. Because working durations were relatively shorter than European workers', the highest CEE was just 300 ㎍·year/m³, which was not enough to induce renal tubular dysfunction. This study, however, suggested the possibility that renal tubular dysfunction caused by cadmium could be happened in Korea in the near future.

낙엽송 열기건조재의 수지삼출예방을 위한 처리기술

강호양,김수원 충남대학교 농업과학연구소 2004 농업과학연구 Vol.31 No.1

This study was carried out for deresinning the larch boards dried in a conventional kiln. Prior to heat treatment they were steamed in an autoclave for 5 hours or frozen for 24 hours at a temperature of -35℃. The velocities of ultrasound transmitted through the specimens were measured to examine the correlation with their resin contents. It was found that the specimens heated at 100℃ for 5 hours contained less resin that those heated at 200℃ for an hour. Both treatments of steaming and freezing were effective for deresinning and the former was better than the latter. The ultrasonic velocities measured before the heat treatment showed a negative correlation to the resin contents of the specimens, but those measured after the heat treatment a positive correlation. This difference may be attributed to the viscosity of resin.

포털사이트 특성의 여성 웹진에 관한 시각적 표현 연구

강호양 한국패키지디자인학회 2003 상품문화디자인학연구 Vol.13 No.-

This study aims to present a way of high-quality visual expression for women's webzines by analyzing those of existing women's webzines. Until late 2000there were only two prominent webzines for women in Korea : www.womenplus.com of 'Women's Internet' and www.miclub.com of 'Seongyoung, I love you', which existed only on the Web. Recently, however, the main stream of women's webzines with potential has been set by women's magazine companies who opened them using the contents obtained in the process of magazine production. Magazines may be defined characteristically as the industry of knowledge and information contents. Today with media's merger as well as the revolution of information and technology, information contents to be conveyed by the merged media become increasingly important establishing themselves as both the key to assuring the media's originality and the knowledge product creating high added value. Korea's leading women's magazines have advantage over competitors when they open and run webzines of various contents both on-line only and on-and off-lines, as they have been able to gain large amount of contents that play an essential role in creating and developing multimedia works. Therefore most promising women's webzines currently issued in Korea have an inseparable relation with women's magazine companies. And it is not too much to say that the identity of women's webzines provided by linking on-line businesses based on existing know-hows has sprung from women's magazines. The number of domestic Internet users already reached over 20 million in late 2001. The increase of the users improves the function of the Internet as a medium and assures possibilities of the internet market's development. Also the rate of female Internet users has rapidly increased from 29.9% in 1999 to 43.2% in October 2001, as a result, making the deviation based on sex ratio insignificant. Although female Internet users reach almost 9 million now, not many studies on Web sites or webzines for women are found considering the importance and the size of the market. It is especially true for systematic researches on the visual structure of Web sites or webzines targeting mainstream women in their 20~30s. Therefore this theses aims to present an effective way of visual expression for women's webzines by a systematic research and analysis of the webzines provided spedifically for women in their 20~30s.

조기 양막 파수 신생아에 대한 임상적 연구

양은석,김강호,박상기,나창수 朝鮮大學校 附設 醫學硏究所 1989 The Medical Journal of Chosun University Vol.14 No.1

A clinical study was made on 157 newborns of mothers with premature rupture of membranes (study group) and 916 newborns of mothers without rupture of membranes (control group) at Chosun University Hospital from Jaunary 1987 to Decembcr 1988. The results were as follows: 1) The incidence of PROM was 14.6%. 2) 10.2% of all babies with PROM were born prematurely, significantly higher than the incidence of PROM in all newborn cases with 4.8% (P<0.005). 3) The incidence of neonatal sepsis in the PROM group (4.5%) was four times higher than in the normal group(1.1%) (P<0.005). The incidience was related to the gestational age at birth, and also increased with increasing time interval after PROM. 4) The incidence of neonatal asphyxia in PROM group (7.6%) was twice the normal group (3.6%) (P<0.025). The premature babies had greater incidence in both groups. Also, a positive correlation was found with increasing time interval PROM. 5) Neonatal respiratory distress syndrome(RDS) was found in 1.3% of babies with PROM, whereas 1.4% of babies in the normal group had the syndrome. Premature babies had higher incidence of RDS in both normal and PROM groups, but the latter had an incidence amounting the only 1/5 of the former. And it tended to diminish with creasing time interval after PROM.