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RISS 인기검색어
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- 저자 : 김영길(Kim, Young Kil) (검색결과 805 건)
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농어촌의료(農漁村醫療)서비스 개선사업(改善事業)에 대한 보건소(保健所) 공무원(公務員)의 인식도(認識度)
김영길,박재용,감신,한창현,차병준,Kim, Young-Gil,Park, Jae-Yong,Kam, Sin,Han, Chang-Hyun,Cha, Byung-Jun 한국농촌의학지역보건학회 1998 농촌의학·지역보건 Vol.23 No.2
This study was performed investigate the opinion of civil servants in Health center about Rural Health Service Improvement Project The survey by mail was carried out for 447 servants of 25 health centers in Kyungsangbuk-do and the data were collected through self-administered questionnaires to servants about need, participation, concern, and comprehension for the project and satisfied with current facility and equipment of health center. The results were as follows. Generally considered, 48.2% of the improved health center servants was satisfied with health center building and 14.0% or 24.1% of the improving or unimproved center was. About the location of health center, 37.7% of the improved health center servants was satisfied, 25.9% of the unimproved center was. Of the improved health center servants, 43% was satisfied with the medical equipment but in unimproved place, the dissatisfaction was appeared higher than any other place. 49.7% of respondents was participated in making out the Rural Health Service Improvement Project. 50.6% was interested in this project. In the improved area. 65.5% of health center servants replied that the mayor's or county executive's concern about this project was high and 46.5% in councilors but in the unimproved area. their concern was low. About the contents of the project. 24,6% of the servants in the improved center, only 15.2% in unimproved center replied that they had known well. After making out the plan, 13.6% of respondents was unsatisfied with this plan and 17.1% replied that the estimating method of selecting the project area was not good. After the improvement of institution and equipment, 86.1% of health center servants answered that the medical service provided by health center would increase but 59.2% replied that the residents' utilization rate of private medical facility would decrease. The servants of the improved health center replied that the recognition about the developing will of health service(91.2%), the efficiency(91.2%), the quality of health and medical service(93.0%), the amount of health project(91.2%) were improved. In health center which had already improved the institution and equipment, 88.5% of servants replied that the residents' utilization for health center was increased. So, this project should be continuously carried out for health center and health center must develope new project to fit region condition.
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김영길,이재의,조성준,유룡 ( Young Kil Kim,Jae Eui Yie,Sung June Cho,Ryong Ryoo ) 한국공업화학회 1994 공업화학 Vol.5 No.5
Ru/γ-Al₂O₃와 Ru/CeO₂-γ-Al₂O₃를 사용하여 Ru담지 촉매의 반응성과 열적노화현상에 미치는 Ce의 영향을 연구하였다. ^(129)Xe-NMR과 수소흡착법을 사용하여 촉매특성을 검토하였으며, 모사 자동차 배기가스를 사용하여 과농, 양론 및 희박조건에서의 CO, HC 및 NO_x 전환율을 측정하였다. 새촉매와 노화촉매 모두 Ru/CeO₂-γ-Al₂O₃가 Ru/γ-Al₂O₃보다 세 가지 오염물질에 대한 전환율이 높았다. ^(129)Xe-NMR과 수소흡착에 의하면 Ce을 첨가하여도 열적노화현상을 억제할 수 없었다. 그러나 673K에서 열적노화시킨 경우 Ru/γ-Al₂O₃의 반응성은 새 촉매보다 작았으나 Ru/CeO₂-γ-Al₂O₃의 반응성은 오히려 컸다. 이것은 열적 노화과정에서 Ru/Ce 사이의 계면에 아마도 새로운 활성점이 만들어지기 때문이 아닌가 사료된다. 또한, Ru금속에 미치는 Ce같은 양이온 효과를 좀더 정량적으로 구하기 위하여 Ca, Ba, La, Y, Ce 등의 양이온을 교환한 Y-제올라이트에 Ru을 담지시킨 모델 촉매의 열적노화 정도를 ^(129)Xe-NMR과 EXAFS로 연구한 결과 이들 양이온이 Ru의 열적 노화성에 거의 영향을 미치지 못하는 것을 관찰하였다. Effects of ceria additive on the activity and thermal aging behavior of supported Ru catalysts were investigated using Ru/γ-Al₂O₃ and Ru/CeO₂-γ-Al₂O₃. The catalysts were characterized by ^(129)Xe-NMR and H₂ chemisorption. The cataltic activity for conversion of CO, HC and NO_x was measured using simulated automobile engine exhausts under lean, rich and stoichiometric conditions. For both fresh and aged catalysts, Ru/CeO₂-γ-Al₂O₃ was more active than Ru/γ-Al₂O₃ for all three pollutants. Results of 129 Xe-NMR and H₂ chemisorption indicated that sintering of Ru particles occurred to the same extent for both catalysts during the thermal aging process. After thermal aging at 673K, however, the catalytic activity of the aged Ru/CeO₂-γ-Al₂O₃ was substantially higher than that of the fresh one, while the activity of Ru/γ-Al₂O₃ decreased after the thermal aging. This finding may suggest new active sites were created during the thermal aging, probably in the vicinity of the interface between Ru and Ce. For more quantitative investigation of the effect of a cation such as Ce on the thermal aging of Ru metal particles, Ru catalysts supported on cation-exchanged Y-zeolites were used as the model catalysts. The results indicated that when Ba, Ca, La, Y or Ce was used for the canon exchange, the exchanged cation did not affect the thermal aging behavior of Ru in Y-zeolite, as evidenced by ^(129)Xe-NMR and EXAFS.
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김영길,박미용,이상배,Kim, Yeong-Gil,Park, Mi-Yong,Lee, Sang-Bae 대한전자공학회 1985 전자공학회지 Vol.22 No.6
기준입력은 정상상태 오차에 영향을 주는 요인 중의 하나다. 본 논문은 표준입력에 의해 야기피는 정상상태 오차를 제거할 수 있는 새로운 디지날 제각기 설계 방법을 제시한다. 먼저 연준입력 함수 형태에 따라, 기준입력 항이 제거된 새로운 제어 시스템 식이 유도되고. 최려제어를 이용하여 유도된 시스템의 출력을 최소로 하는 제어법칙이 구해진다. 강태공간 방법에 의해. 제시된 제어 알고리즘은 불안정 시스템을 포함해서 시불변 선형 시스템에 적용될 구 있다. The reference input is one of causes having an effect upon the steady-state error. This paper dcscribes a design method of a digital controller to remove the stcadyftate error caused by the reference input. According to the types of the reference input, new system equations to remove the reference input term from controlled system equations are derived first. And, using the optimal control theory the control law is obtained to minimize the output of the new system. Based on the state-space approach, the proposed control algo-rithm can be applied to time-invariant linear systems including the unstable systems.
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김영길,정연길,송준백,신민철,이희수,Kim, Young-Kil,Jung, Yeon-Gil,Song, Jun-Baek,Shin, Min-Chul,Lee, Hee-Soo 한국세라믹학회 2005 한국세라믹학회지 Vol.42 No.3
폐유리와 점토를 이용하여 일축 가압 성형법으로 타익을 제조하였다. 유리함량, 소성온도 및 소성시간에 따른 타일의 흡수율, 밀도, 겉보기 기공률, 압축강도, 마모감량 등을 고찰하였다. 소성온도 및 유리함량이 증가함에 따라 타일의 특성은 향상되었다. 폐유리를 $70wt.\%$ 사용하고 $1,050^{circ}C$에서 소성한 타일이 가장 우수한 특성을 나타내었으며, 이 때의 흡수율, 밀도, 겉보기 기공률, 압축강도, 마모감량은 각각 $0.9\%,\;2.3g/cm^3,\;2.1\%$, 210 MPa, 0.022g이었다. 이는 유리상의 혈성에 의잔 결과로서 타일의 기공 감소 및 치밀화에 기여하기 때문이다. 제조된 타일의 특성은 상용화되고 있는 일반 자기질 타일과 비교하여 우수한 특성을 나타내고 있으며, 바닥 및 내$\cdot$외벽용 무유타일로 적용 가능할 것이다. Wall and floor tiles were fabricated by a dry pressing method using waste glass and clay. The physical properties of the tiles such as absorption, bulk density, porosity, compressive strength, and abrasion loss are investigated with the firing temperature and glass contents. The physical properties are improved with increasing the firing temperature and glass contents. The composition containing the glass of $70 wt%$ and fired at $1050^{\circ}C$ for 2 h has the good properties. The optimal properties obtained in the tiles are the water absorprion of about $0.9\%$, the bulk density of about $2.3\;g/cm^3$, the apparent porosity of about $2.1 \%$, the compressive strength of about 210 MPa, and the abrasion loss of about 0.022 g, when the composition containing the glass of $70\;wt\%$ is fired at $1050^{\circ}C$. The physical proper1ies of tiles fabricated were enhanced compared to the commercial clay tiles, due to easy melting and densification of glassy phase during the firing process.
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