부산·울산·경남지역 직업병 감시체계

김정일,김병권,김정원,채창호,이철호,강동묵,김지홍,김진하,김영욱,이영하,이지호,김정호,윤형렬,유철인,정백근,장태원,김운규,윤동영,강진욱,김종은,안진홍,이동준,장준호,이광영,송혜란,최영희,이용환,조병만,최홍렬,고상백,김은아,이유진,홍영습,정갑열,김정만,김준연 大韓産業醫學會 2004 대한직업환경의학회지 Vol.16 No.1

Objective: Occupational medicine specialists in the Busan, Ulsan and Kyung-Nam areas established an area-based occupational disease surveillance system and used this system to collected case information for the purpose of preventing occupational diseases Methods: l l hospital participated in this system. The authors selected five main diseases, which were hand-arm vibration syndrome (HAVS), work-related musculoskeletal disorder (WRMSD), occupational asthma, occupational skin disease and occupational and occupational lung cancer and established their case definitions. All cases were reported on the web, and real time analysis was conducted. Results: Between April 2001 and April 2003, 192 cases of HAVS, 118 cases of WRMSD, 33 cases of occupational asthma, 17 cases of occupational skin disease and 17 cases of occupational lung cancer (for a total of 377 cases of these five main diseases) were reported. most of the HAVS cases came from shipbuilding, and 172 of them (92.7%) were associated with grinding. Of the four main types of WRMSD, carpal tunnel syndrome (CTS) was the most prevalent with 46 cases and shipbuilding was also the main industry involved (83.9%). The ergonomic risk factors involved mainly associated with the hand. In 19 (57.6%) and 4 (12.1%) cases of occupational asthma, the agents involved. The causative agents of occupational lung cancer included Cr, welding fume, PAH, Ni, etc. 10(58.8%) of the cases were diagnosed as squamous cell carcinoma and 5(29.4%) as adenoma. Conclusion: This result showed that an area-based occupational disease surveillance system might provide an effective method of evaluating the prevalence of such diseases, however the Busan, Ulsan and Kyung-Nam provinces are too large to be treated as individual areas. Therefore, the authors suggest that each province should establish its own surveillance system.

Destructive Encephalopathy를 보인 Incontinentia Pigmenti 1예

한진규,최재철,박민규,박건우,은백린,정지태,이대희 대한신경과학회 1998 대한신경과학회지 Vol.16 No.5

절연물층을 확산시킨 (Ba0.5, Sr0.5)TiO₃박막의 전류-전압 특성

진병태,김진철,김명호 國立 昌原大學校 産業技術硏究所 1998 産技硏論文集 Vol.12 No.-

The mixture of PbO-Bi₂O₃-B₂O₃(PBB) phase was formed in the Ba0.5Sr0.5TiO₃(BST) film and the effects of PBB phase on the dielectric properties of the BST film were investigated. The amorphous PBB layer was deposited on the BST film using rf magnetron sputtering and diffused into the film by heat treatment. The PBB phase in BST film was identified by energy dispersive spectrometer (EDS). Dielectric properties of BST film were significantly improved after the diffusion of PBB. The leakage current density of BST film decreased from 3.24×10(-5) A/㎠ to 9.45×10(-8) A/㎠ at 1.5 V and the dielectric constant increased from 238 to 533. These results show that the formation of insulating metal oxide in the ferroelectric film can improve the dielectric properties of the film.

축산시설의 입지특성 분석 : 안성시 미양면을 중심으로

황한철,전우정,이남호,홍성구,김진태 안성산업대학교 1998 論文集 Vol.30 No.2

It is necessary to evaluate the location suitability of livestock facilities to guide reasonable livestock. The evaluation system could help plan new livestock facilities in rural areas. The assessment was performed based on location characteristics of livestock facilities such as land utilization around livestock facilities, size of livestock facilities, water and drainage condition, accessibility and distance from roads, floor condition, distance from village and house, direction of livestock facilities, ventilation facilities, animal Waste treatment, and so forth. In this study, location characteristics of livestock facilities were showed each location factors using statistical analysis.

시차주사열량분석기를 이용한 치과용 접착시멘트의 경화기전 및 반응열에 관한 연구

김철위,이용근,윤태호,김효종,남세진 大韓齒科器材學會 2000 대한치과재료학회지 Vol.27 No.3

The working time of dental cement has a close relation with the setting time, where the setting reaction can be said as the result of the chemical reaction between cement liquid and powder. The purpose of this experiment was to investigate the setting characteristics and setting rate of dental cements by measuring the exothermic heat(Joule/gram) from the setting reaction at specified times using a differential scanning calorimeter (Differential Scanning Calorimeter, DSC 204, TASC 414/3A Controller, Netzche, Germany). Graphs of time-exothermic heat at 37℃ isothermal condition, showing the setting reaction of dental cements were plotted. Three types of luting cements studied were zinc-phosphate cement (ZPC), polycarboxylate cement (PCC), and glass ionomer cement (GIC). The effects of powder-liquid ratio on the setting characteristics of cements were also included. The amount of heat (calory) released per one gram of cement was calculated at each specified time, and was analyzed. ANOVA and Scheff's multiple comparison test (p=0.05) were used for statistical analysis using SPSS/PC+. The setting rate of cement was not constant during the setting reaction, and different setting characteristics were observed depending on the type of cement and powder/liquid ratio. Generally, 70∼90% of the setting reaction, measured by the exothermic heat release, occurred within 5 minutes after mixing. The exothermic heat released by ZPC was very high immediately after mixing, and the duration of the heat release was prolonged compared with other cements. The exothermic heat release of PCC finished most rapidly. It was generally observed that the amount of heat release (rise in temperature) per one gram of cement was highest for ZPC, followed by GIC, and then PCC. However, heat release during the first 2∼5 minutes after mixing was highest for GIC, followed by ZPC and then PCC. According to the Scheff's multiple comparison test, the duration of the total setting reaction did not show any significant difference among the cements(p>0.05), and also among the different power/liquid ratio groups(p>0.05). It was observed that more heat was released with the lower powder/liquid ratio than the higher powder/liquid ratio.

교육대학원에 있어서 초등 과학교육 영역의 중요성과 그 운영방안

오진태,옥치율,한영욱,이형철,김용권,임채성 釜山敎育大學校 1994 부산교육대학 논문집 Vol.30 No.1

The future society is expected to be rapidly change in all areas, that is, the length of change time is becoming much smaller than that of generation time. It is very important to prepare the citizens who possess scientific literacy which actively cope with the rapid changes and specialization of society. The sources of rapid changes may be due to the developments in science and technology. Therefore, the importance of science education will be increasingly high. Scientific literacy should be improved basically and systematically from the early stages of formal education. Teachers who are responsible to educate children should be able to research in the areas of science education as well as science itself, and to have capacity to transmit them to the classroom. To do this, the graduate course and the science education within the system beyond the level of college education are essential parts of teacher education. In the graduate course, it is important that science itself and pedagogy of science should be balanced.

N₂O 가스로 열산화된 게이트 산화막의 전기적 특성

김태형,김창일,최현식,장의구,서용진,이철인 중앙대학교 생산공학연구소 1992 생산공학연구소 논문집 Vol.1 No.2

미래의 ULSI 소자의 게이트 산화막으로 이용하기 위하여 N₂O 가스 분위기에서 기존의 전기로를 이용한 실리콘의 열산화에 의해 N₂O 산화막을 형성하였고, MOS 소자를 제작하여 전기적 특성을 고찰하였다. 900℃에서 90분간 산화한 N₂O 산화막의 경우, 플랫밴드 전압(??), 고정전하밀도(??)와 플랫밴드 전압의 변화량(??)은 각각 0.81 [V], ?? [??]와 80∼95[mV]를 나타내었다. N₂O 산화막의 전기전도기구는 저전계 영역에서는 Fowler-Nordheim 터널링, 고전계영역에서는 Poole-Frenkel 방출이 지배적으로 나타났고, 절연파괴전계는 16 [MV/㎝]로 높게 나타났다. 따라서 N₂O 산화로 형성된 게이트 산화막이 ULSI 소자의 게이트 유전체로 응용이 가능하리라 생각된다. In order to applicate gate insulators in future ULSI devices, electrical properties was investigated in MOS device with N₂O oxide grown by thermal oxidation using conventional furnace in N₂O ambient. For the sample oxidized at 900℃ for 90 min, Flatband voltage(??), fixed charge density(??) and shifts of flatband voltage(??) after BTS was obtained 0.81 [V], ?? [??] and 80∼95[mV], respectively. The dominant conduction mechanism of N₂O oxide appeared to be Fowler-Nordheim tunneling in the low electrical field region(4-6 [MV/㎝]) and to be Poole-Frenkel emission in the high electrical field region( 9 [MV/㎝] or above). Dielectrics breakdown fields of N₂O oxide appeared about 16 [MV/㎝]. These results suggest that the N₂O oxides is a promising candidate for ultrathin gate dielectric for MOS ULSI applications.

(Ba0.5 Sr0.5 )TiO₃박막의 전기전도 기구에 관한 연구

김진철,진병태,김명호 國立 昌原大學校 産業技術硏究所 1999 産技硏論文集 Vol.13 No.-

Dielectric properties and conduction mechanism of BST thin film with a thickness 50 nm deposited by r.f. sputter were investigated. The crystal structure of thin film was cubic perovskite, and the BST film did not have any preferred orientations. Microstructure of the BST thin film was a well-known columnar grain structure. The dielectric constant was increased after post annealing up to 284 at 550℃. It was mainly due to the improvement of crystallinity of BST film. According to current-voltage(I-V) characteristics, I-V of BST was varied with deposition methods of top electrode and annealing temperatures. The activation energies in the range of low and high applied voltage were 0.2∼0.3 eV and 0.6∼0.9 eV, respectively. We could not consider that these energies were barrier heights between Pt and BST, and trap energies existing in BST film. Therefore, the conduction of BST film couldn't be explained the simple Schottky emission and/or Poole-Frenkel emission process.

공기청정기의 일부 실내공기 오염물질 제거효율에 관한 연구

이태형,김윤신,홍승철,이철민,김종철,전형진,김중호 한국환경과학회 2005 한국환경과학회지 Vol.14 No.5

In this study, we investigated PM_(10), NO₂, and 1-hydroxypyrene(1-OHP) in urine at indoor environments which are 35 houses and 20 hospitals for using air cleaner and non-using air cleaner in Seoul metropolitan area and Kyoung-gi province from April, 2003 to February, 2004. Moreover, we examined effect of improvement for indoor air quality and health effect by concentration of 1-OHP also we investigated removal efficiency by air cleaner for PM_(10), NO₂, and 1-OHP that were 28.5%, 27.4%, and 42.1% respectively. Concentration of PM_(10), NO₂, and 1-OHP were 19.02±18.14μg/m³, 8.66±3.06ppb, and 0.19±0.18μg/g creatinine when air cleaner was no worked. The concentration for PM_(10), NO₂ and 1-OHP were 13.60+10.79μg/m³, 6.29±2.71ppb, and 0.11±0.10μg/g creatinine, respectively. It was significant statistically. Therefore, it is considered using the air cleaner to remove the partial pollutants in indoor environment and is positive effect for health.

일 농촌지역에서 발기부전의 유병률 및 상관 요인

홍진표,송해철,이무송,이창화,안준호,한오수,안태영,김성윤 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : The purpose of this study was to investigate the prevalence of erectile dysfunction (ED) in a rural area of Korea and to examine the relationship between the prevalence and correlates of subjects. Method : This study was done as a part of the chronic disease survey of rural area by the Asan Foundation. Among 30 years or older population from Jung Eup, a rural area of Korea, 711 male subjects were sampled using a cluster probability sampling method. Trained interviewers visited and interviewed subjects aged 30 years or older with a structured interview. ED was categorized as 'none', 'mild', 'moderate', or 'severe' according to the ability to 'attain and/or maintain an erection satisfactory for sexual intercourse'. Response rate was 54.3% (N=386). Results : The age weighted prevalence of ED was 27.2% (minimal 14.1%, moderate 7.6%, severe 5.5%). Prevalence and severity increased with age. Liver disease and underweight were significantly (p<0.05) associated with ED. Smoking seemed to be correlated with ED, but did not reach statistically significant level. Conclusion : ED was highly prevalent in the rural community of Korea. Medical, sociodemographic, and lifestyle variables associated with ED may alert physicians to patients at risk for ED and offer insight to its etiology.