특집 ( Special Issues ) : 환경친화적 산지개발 추진방안

최영국 한국농촌계획학회 1999 농촌계획 Vol.5 No.1

알루미나($Al_2O_3$)세라믹과 알루미늄(A1050)과의 대기중 브레이징 접합에 관한 연구

최영국,박성현,김윤해,김영식 한국마린엔지니어링학회 1995 한국마린엔지니어링학회지 Vol.19 No.3

In recent years, many ceramic researchers have discoved various methods of joining ceramic to metal. However, most of these joining methods are perfomed under vacuum and pressured circumstances. So, when we join ceramic to metal,the proceedings are very complicated and require a very high cost. The purpose of this study is to develop a new joining method of an alumina ceramic to an aluminum metal in air atmosphere. The joining condition, such as copper metallizing, nickel plating, brazing, etc. was investigated through the shear strength test of the trial joint. The results obtained from the above experimenta are summarized as follows : 1) In the case of the $Al_2O_3$/$Al_2O_3$joint, the shear strength of the joint was affected by the various foctor such as kaolin content, copper metallizing thickness, firing temperature, firing time. 2) The better shear strength of the $Al_2O_3$/Al joint was obtained when Ni plating was conducted under higher current density than existing plating condition. 3) The shear strength of the $Al_2O_3$/Al joint increases with the Ni plating thickness is confined to the range of this paper. 4) The shear strength of the thermal-shocked specimen($Al_2O_3$/Al joint) was far more deteriorated than that of the as-bonded specimen.

韓國에 있어서의 庭園의 形態 및 庭園樹에 對한 考察

최영국 건국대학교 1976 建農學報 Vol.7 No.1

면역성 신장질환의 유전자 치료

최영국,박종구,김영상,백상기 충남대학교 생물공학연구소 2002 생물공학연구지 Vol.8 No.2

Renal failure caused by a wide variety of etiological factors is characterized by progressive and irreversible deterioration of nephrons in the kidney. Despite the diversity of renal diseases, the appearance of inflammatory cells at the site of tissue injury is the hallmark of almost all renal diseases. Humoral and cell-mediated immune responses and soluble mediators play pivotal roles in the progression of renal injury. The utility of IL-10, a cytokine with potent anti-inflammatory activity, in the treatment of glomerulosclerosis in FGS/Kist mice in which renal disease occurs naturally with agin was studied. The group treated with recombinant anenoviruses encoding IL-10 was shown to have significant suppression of glomerular sclerotic index and reduced proteinuria when compared to LacZ or sham controls. Practical therapies are not currently available, but candidates for molecular therapeutics for renal diseases include vector-based gene therapy and the use of molecular compounds such as anti-inflammatory cytokines. There is a compelling need to improve vector systems, to control transgene expression, and to achieve cell-specific or localized targeting in gene therapy for renal disease.

환경은 국력이자 세계화의 요체이다

최영국 대한지방행정공제회 1996 도시문제 Vol.31 No.333

전환되어야 할 국립공원의 관리정책

최영국,Choe, Yeong-Guk 한국자연공원협회 1988 한국자연공원 Vol.39 No.-

본고는 최근 국토정보다이제스트 (국토개발연구원간)에 발표된 것으로 필자의 동의아래 게재한다.

KRICT Pervaporation 분리막

최영국,김광제,이수복 ( Young Kook Choi,Kwang Je Kim,Soo Bok Lee ) 한국화학공학회 1989 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.27 No.5

A PVA pervaporation membrane, which has preferential selectivity for water, was introduced. For the separation of ethanol-water mixtures above 90 wt% of ethanol, the membrane exhibited selectivity above 50 and permeability of 0-0.4 ℓ/hr·㎡, The membrane surface area required for the production of 360 ㎏/hr absolute ethanol from 93 wt% ethanol-water mixture by the pervaporation process using the membrane was estimated as 163 ㎡. In this case, the average ethanol concentration was calculated as 13.5 wt%. The energy cost of pervaporation process was compared with that of azeotropic distillation process using benzene as an entrainer. As a result, it is confirmed that the energy cost of pervaporation process is merely 115 of that of azeotropic distillation process.

지속가능한 국토관리를 위한 자연훼손 저감방안 연구

최영국 안양대학교 수도권발전연구소 2007 수도권연구 Vol.- No.4

  Therefore, this study has been carried out for the "regular" natural environment within development sites such as New Towns, instead of protected areas. To be specific, the study aims to suggest institutional frameworks to reduce degradation of the natural environment within development sites, such as green areas, hill areas, streams and landscapes. Under well-planned development, these sites may remain connected with the surrounding ecosystem even after the development.<BR>  The scope of this study is plan establishment and environmental performance assessment, and does not include design, construction or post managerial process during which environmental degradation still occurs.<BR>  The study identifies five types of environmental degradation that was dealt with in previous studies and under relevant legal institutions. Then, it comes up with the operational definition of environmental degradation based on the comparison of the concepts and scopes of environmental degradation covered in previous studies and relevant institutions local and abroad. Based on the definition, the study limits the scope of the research to green areas, river and stream, topography and ecosystem.<BR>  Based on these analyses and examinations, the study suggests the causes of environmental degradation as follows: development plans ignoring the problem of environmental degradation; incomplete environmental performance assessment; lack of consideration of the area-wide green axis system, and of legal institutions for securing protected areas under consideration; plan establishment focused on distribution of facilities for human convenience rather than consideration for the nature; differing awareness of development and conservation among people; plans based on excessive confidence in science and technology; and development behavior using a loophole in the law.<BR>  The major strategies the study suggests are as follows, and they may be promoted in actual situations: strengthening the environmental performance of spatial planning; drawing out environmental plans to be utilized as a guideline for the development strengthening the function of environmental performance assessment; preparation of institutional tools that will make it possible to review the substantial alternatives devised to prevent environmental degradation of a place followed by the developments at the plan establishment stage; preparation of institutions allowing for ecosystem service provision; and basic data construction. For each individual strategy, the study suggests detailed plans for implementing them.<BR>  Lastly, the study suggests the following as issues for follow-up researches: drawing up the contents of environmental plans, and exploring methods to apply them to actual situations; preparing of the guidelines for environment map production; basic study for establishing "nature consideration regulations", and promotion of pilot projects; defining the ecosystem service and methods for the application; methods for improving the utilization of area-wide green axes, and addressing conflicts arising surrounding them; concrete measures for unifying the system for environmental impact assessment; complementing the plan for the infrastructure in green areas; and linkage of spatial development planningand environmental planning.

일체식 및 반일체식 복합슬래브 교량의 구조거동 분석에 관한 연구

최영국,장일영 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 논문집 Vol.22 No.1

기존 거더 형식의 교량이나 슬래브 교량에서는 신축이음장치, 받침, 역T형 교대 및 별도의 접속슬래브 구조를 이루는 시스템으로 이루어져 있다. 이러한 시스템은 신축이음부의 빈번한 파손으로 인한 비용증가, 모멘트 재분배가 낮은 구조로 인한 내구성 감소 등의 문제가 있다. 상기의 문제를 개선하기 위해 일체식 및 반일체식 복합 교량을 제안하고 구조해석을 통해 안전성을 검토하였다. 검토결과 단면강성은 작지만 접속슬래브와 본체 구조가 연속 강결된 다연속‧ 프레임 구조계 형성과 상부구조의 경간과 단면강성의 균형으로 인하여 모멘트재분배와 힘전달이 확실하게 이루어져 기존교량에 비해 구조안전성 높은 구조임을 확인하였다. Girder bridges and slab bridges are equipped with a system consisting of a flexible joint unit, support, inverted T shaped abutment, and a separate connecting slab structure. These systems have problems such as an increase in cost due to frequent breakage of the expansion joints and a decrease in durability due to a structure with low moment redistribution. To improve these problems, propose Inegral and Semi-Integral Hybrid Slab Bridge and examine the safety through structural analysis. As a result of the review, Inegral and Semi-Integral Hybrid Slab Bridge was the section stiffness is small. but it is confirmed that the structural safety, ductility and flexibility are higher than existing bridges because the moment redistribution and the force transmission are surely performed.

만성 불치 요통 : 최신 치료 대책 A Strategy to Salvage

최영국 대한통증학회 1996 The Korean Journal of Pain Vol.9 No.1