성홀몬이 생쥐結腸腸腺上皮細胞에 미치는 影響에 關한 自記放射法的 硏究

許聖允 최신의학사 1967 最新醫學 Vol.10 No.5

Effects of sexual hormones on the rate of cell division in the colonic epithelium of young adult mice of both sexes, weighing (about 20 grams each, were studied by autoradiographic technique. 15 male mice were evenly divided into three groups: a normal control group, another group which was castrated and the third group administered with testosterone propeionate after castration. 20 female mice were also evenly divided into four groups: one group in diestrus, another group in estrus, a third group which was cstrated and the fourth group administered with estradiol benzoate after castration. The sexual hormones were injected subcutanously into the castrated mice twice at an interval of over 24 hours with a does of 2pgm/gm body weight. 24 hours after the hormone injection, the animals were given intravenously a does' of 0.8 pc/gm body weight of tritiated thymidine and were sacrificed seven hours thereafter. Pieces of the colon were fixed in Bouin's fluid and made into paraffin sections of 3,u. Labelled nuclei per 1000 nuclei in the colonic glandular epithelium were calculated and the ratio was tentativly set as the radioactive index. 1. The radioactive indices of the colonic epithelium of the castrated mice were markedly reduced compared with those of the normal group and the indices were restored to the nor- mal or, a little higher level after hormone injection. 2. During diestrus period, the radioactive indices of the colonic epithelial cells in the female mice` were generally larger than those in the estrus period. Consequently, it is to be believed that the injected sexual hormones increase the value of DNA synthesis, with the result that renewal rate of the colonic crypt cells of the castrated 'mice is accelerated, finally the normal or a little higher level is reached.

다기준의사결정 기법을 이용한 신재생에너지 기술 평가의 우선순위 결정

허성윤,조만석,이용길 한국혁신학회 2016 한국혁신학회지 Vol.11 No.2

본 연구에서는 국내 에너지 분야 전문가들에 대한 AHP 설문을 중심으로 향후 국내 신재생에너지의 빠른 보급 확대 및 국내 신재생에너지 산업경쟁력 강화를 위한 기술개발 방향을점검하고 이와 관련된 정책적, 전략적 함의를 논하였다. 전문가 대상을 크게 정부, 학계, 발전사로 나누어 해당 집단별로 신재생에너지 기술에 대해 어떤 인식을 지니고 있는지 각집단별 의견 차이를 객관적인 수치 데이터를 통해 입증했다. 신재생에너지 기술 평가의 최우선순위에는 경제성 향상 기술이 위치한 것으로 분석되었다. 전문가들은 화석에너지원과 신재생에너지원의 그리드패리티를 달성하기 위한 제반의경제성 향상 기술이 가장 시급한 것으로 인식하고 있기 때문이다. 따라서 경제성 향상 기술과 관련된 연구개발이 더욱 확대될 것으로 예상된다. 소항목의 경우, 발전단가 하락 기술, 에너지 전환효율 향상 기술, 에너지 저장 기술이 산업경쟁력 강화를 위한 주요 기술개발요소로 인식되고 있으며, 국내 주요 연구개발주체들과 발전사업자들 또한 이러한 요소들에초점을 맞추어 R&D를 추진할 것으로 예상된다. 국내 신재생에너지 기술개발 방향과 관련해서 산학연의 의견 차이가 크지 않았다. 다만 정부의 경우, 외부성의 해소와 사회적 편익의증대를 위해 상대적으로 환경과 관련된 기술적 측면에 보다 큰 비중을 둘 것으로 예상된다. This paper aims at setting priorities of new and renewable energy technology development in South Korea, where total R&D budgets become more and more limited and scarce. For this purpose, the paper adopts AHP (analytic hierarchical process) methods for the analysis. The authors have surveyed experts from triple helix (industry, government & government research institute, and university) and analyzed their responses quantitatively. Also, the authors tried to identify inter-sector differences and similarities of opinions, which means that there are any different views among industry, government, and university regarding new and renewable energy technology development. As results, there are no significant differences among priority setting on renewable energy technology development among triple helix. They all have higher priorities on economic feasibility enhancing technologies such as energy conversion efficiency enhancement technologies. Therefore, Korean renewable innovation system will focus more on economic feasibility enhancing technologies. Energy storage system gets more attention from triple helix and environment friendly technologies will be more important in the future.

국내 원자력 발전 감소에 대한 사회적 수용성 분석

허성윤,김가은 한국에너지학회 2018 한국에너지공학회 학술발표회 Vol.2018 No.04

같은 정보를 <그림> VS <표>로 제시하면 소비자의 인지능력이 달라지는가?

허성윤,진현정 한국자료분석학회 2022 한국자료분석학회 학술대회자료집 Vol.2022 No.7

가시광선 중합형레진의 잔류 Camphorquinone 함량에 관한 분석 연구

허성윤,최호영,민병순,박상진 慶熙大學校 齒科大學 1989 慶熙齒大論文集 Vol.11 No.-

Recently, visible light-cured resins have been widely used in the field of clinical dentistry for esthetic fillings. Most of the visible light-cured resins contained amount of 2,3-diketo-1,7,7-trimethylnorcamphane (camphorquinone). The curing depth, homogeniety of polymerization and the mechanical properties of the polymers are influenced by the concentration of monomers and fillers, initiators and reductants, and concentrations of camphorquinone. The contents of camphorquinone contained in the light-cured composite resins are of considerable important in polymerization. The purpose of this study was to analyse camphorquinone contents in visible light-cured resins and investigated the residual camphorquinone concentrations according to the exposure time by two kinds of light sources. In this study, materials were used five kinds of visible light-cured resins, Silux-Plus�, Bis fii , Lite-Fil , Durafill arid Helio-progress�. A hundred specimens were made with 2mm thickness from each 0.5g of five light-cured resins. The light sources were fluorescent light (40 watt) and operating light (150 watt). The specimens were exposed to two kinds of the light sources for 5,10,20 minutes, 12 and 24 hours respectively after the specimens made. The concentration of camphorquinone in the resin paste was analysed with Gas Chromatography, and the following results are obtained: 1. The range of camphorquinone concentration in the visible light-cured resins was 0.028wt%-0.043wt%. 2. The camphorquinone concentration of Lite-Fil and hybrid type was the highest, and that of Silux-Plus as microfilled type was the least. 3. Higher residual camphorquinone contents with respect to all exposure time are obtained for the fluorescent light than f'or the operating light. 4. The concentration of camphorquinone was decreased with exposure time lapse. 5. The residual camphorquinone contents were greatly decreased within initial 5 minutes after light exposure.

Social Preferences for a Policy Category - An Empirical Analysis Focusing on Renewable Energy Policy-

허성윤 한국혁신학회 2017 한국혁신학회지 Vol.12 No.4

This study suggests an integrated approach to simultaneously analyze public preferences for multiple policies in a policy category. It is often necessary to understand public preference structure for a certain policy category in order to design overall policy direction. To achieve this, a data classification method is developed to classify various policy alternatives. The multivariate probit model is used to analyze these classified data. Empirical analyses are conducted for three renewable energy policies: the Renewable Portfolio Standard, Renewable Fuel Standard, and Renewable Heat Obligations. The selected policies represent a strong regulatory component and serve as quantitative policies in the electric power, transport, and heating sectors, respectively. The results show that the public is sensitive to increased energy prices in general, because they assign great importance to the price attribute. Moreover, the public’s average preferences for renewable energy policies can change according to the type of RHO. While the public’s level of knowledge about renewable energy policies has a positive effect on their choice of eco-friendly policies, their attitude toward environmental protection has no bearing on the same. Thus, in order to ease public resistance incurred by possible increases in energy prices, governments should map out efficient strategies to improve the public’s knowledge of renewable energy policies. In conclusion, the proposed methodology in this study allows one to analyze public preferences for a superordinate policy category simultaneously. The framework of this study can be generally applied to any public policy. Notably, the proposed integrated data classification method can be applied to any category of policies/ products having common attributes.

계층분석법(AHP)을 이용한 우리나라 신재생에너지정책 구성 요인의 상대적 중요도 분석

허성윤,조만석,이용길 한국혁신학회 2016 한국혁신학회지 Vol.11 No.1

Through the analytic hierarchical process of Korean renewable energy policy, it seems that Korean expertises are setting higher priorities on technology policy rather than regulation policy and supportive policy. Even though regulation policies such as RPS, RFS, and RHO can achieve short-term goals of renewable diffusion, technology policies and supportive policies of renewables can provide long-term vision of Korean integrated energy system. Among triple helix of Korean renewable energy innovation system (government-university-industry), Korean government has focusing regulation policies, instead Korean industries prefer supportive policies and universities prefer technology (R&D) policies. Regarding technology policy, cost down technologies of generation, energy transforming technology, and ESS (energy saving and storage) technologies have accentuated. Therefore Korean government needs to set up integrative policy framework among regulation policies, technology policies and supportive policies of renewables. 온실가스 감축을 통한 기후변화 대응이라는 관점에서 신재생에너지원 및 관련 기술이주목받아 왔다. 최근에는 환경적인 이유뿐만 아니라 일자리 창출 등 국가경제 기여도 측면에서도 신재생에너지 산업 육성의 중요성이 점차 강조되고 있다. 그럼에도 불구하고 세부적인신재생에너지 정책 및 기술개발 방향에 대해서는 해당 주체의 이해관계에 따라 정부, 산업계등의 입장 차이가 명확해, 대부분의 경우 관련 정책의 도입 및 시행 과정에서 이에 기인한갈등이 존재해 왔다. 본 연구는 다기준 의사 결정법(Multi Criteria Decision Making)의 일종인 계층 분석법(Analytic Hierarchy Process)을 통해 향후 국내 신재생에너지 정책에 대한응답자 군별 시각 차이를 분석하고, 이들 간의 간극을 좁힐 수 있는 방법을 제시하는 것을목표로 한다. 이를 위해 신재생에너지의 빠른 보급 확대를 위한 정책수립 우선요인과 신재생에너지 산업경쟁력 강화를 위한 기술개발 우선요인에 대한 의견을 종합적으로 분석하였으며 정부, 발전사업자, 학계 세 범주별 의견을 상세히 도출하였다. 분석 결과, 기술개발 방향에 대해서는 정부, 학계, 발전사의 의견 차이가 크지 않았으나, 상대적으로 정책시행 방향과관련해서는 응답자 군별로 인식에 큰 간극이 존재함을 확인하였다. 또한 대부분의 전문가들은 기술 정책에 높은 우선순위를 부과하는 것으로 나타나, 보다 장기적이고 근본적인 정책시행을 중요하게 여기고 있음을 확인하였다.

신재생에너지정책에 대한 산학관 전문가그룹의인식 차이에 관한 분석

허성윤,조만석,이용길 한국혁신학회 2015 한국혁신학회지 Vol.10 No.1

This research analyzed the results of survey on Korean renewable energy policy among experts in governmental, academic, and entrepreneurial sectors (triple helix). Through the analysis, perceptual differences of triple helix have been identified. Governmental sector accentuates renewable heat obligation (RHO), while academic sector focuses on renewable facility obligation and firms focus on subsidies relatively. Anyway they all deeply recognize the necessity of renewable portfolio standard (RPS). In terms of effectiveness, experts appreciate RPS and renewable facility obligation. Instead, they underestimate the needs of RHO and renewable fuel standard (RFS). Experts from government and universities better recognize the objective of renewable energy policy than experts from firms do. Experts in universities are targeting at the exact objective of renewable energy policy, while experts in governments are targeting higher and experts in firms targeting lower. Therefore, it is identified that the diffusion of Korean renewable energy system is mainly driven by government. 본 연구는 우리나라의 산학관(triple helix)의 전문가 그룹 100여명을 대상으로 신재생에너지 정책의 실효성 등에 대한 설문조사 결과를 분석하였다. 본 연구결과, 전문가들은 정부의신재생에너지 정책 중, 신재생에너지 금융지원 정책과 신재생에너지 설치 의무화 정책에대한 필요성을 높게 인식하는 것으로 나타났다. 반면, 신재생 열에너지 공급 의무화 정책(RHO)과 신재생에너지 혼합 의무화 정책(RFS)은 다른 정책 대비 필요성을 낮게 인식하는것으로 나타났다. 정부(공무원)는 신재생에너지 공급 의무화 정책(RPS)에 대한 필요성은높게, 일반보급 보조사업은 낮게 인식하고 있는 것으로 나타나, 대규모 공급자 위주의 정책이 필요하다는 인식을 지니고 있는 것으로 판단된다. 학계의 경우, 신재생에너지 설치 의무화 정책과 신재생에너지 공급 의무화 정책(RPS)에 대한 필요성은 높게, 신재생 열에너지공급 의무화 정책(RHO)과 신재생에너지 혼합 의무화 정책(RFS)은 낮게 인식하고 있는 것으로 나타나 열 부문과 수송 부문에 비해 발전 부문의 신재생에너지 정책 필요성을 높게 인식하고 있었다. 또한, 발전사의 경우 신재생에너지 금융지원은 높게, 신재생에너지 공급 의무화 정책(RPS), 신재생 열에너지 공급 의무화 정책(RHO)과 신재생에너지 혼합 의무화 정책(RFS)은 낮게 인식하고 있는 것으로 나타나 의무화 제도의 필요성에 대해 다소 부정적인입장을 지닌 것으로 보인다. 신재생에너지 공급 의무화 정책(RPS)이 실효성이 가장 높은것으로 평가한 반면, 신재생 열에너지 공급 의무화 정책(RHO)과 신재생에너지 혼합 의무화정책(RFS)은 다른 정책 대비 실효성을 낮게 평가하였다.

Spectrophotometer를 이용한 지르코니아 코어의 두께 및 도재축성법에 따른 색조의 변화에 대한 연구

허성윤,김재홍,손호정,Huh, Sung-Yoon,Kim, Jae-Hong,Son, Ho-Jung 대한치과기공학회 2011 대한치과기공학회지 Vol.33 No.4

Purpose: The purpose of this study was to compare color parameters of different fabrication method of Lava ceram powder, Lava DVS blocks, IPS e.max ceram and IPS e.max zirpress. Methods: The three available shades(A1, A2, A3.5) of Lava & Kavo zirconia blocks were examined. For each of three colors, three different thickness were tested, 5 times of measurement frequency. The measurements were made using a spectrophotometer equipped with an integrating sphere using the CIE $L^*$, $a^*$, $b^*$ colorimetric system. Results: Lava build-up group and Lava DVS group showed clinically perceived color difference, on the other hand IPS e.max build-up group and IPS e.max zirpress group did not show clinically perceived color difference to shade allowed on core. When the thickness of porcelain veneer increased from Lava and IPS e.max groups, color differences(${\Delta}E$) were decreased. Conclusion: All-ceramic system has color characteristics that clinicians have to consider when selecting materials. Also, manufacturers of different porcelain systems must make every effort to achieve color reproducibility.

고효율 가전제품에 대한 소비자 선호 및 구매의사 분석

허성윤 한국에너지학회 2019 한국에너지공학회 학술발표회 Vol.2019 No.5