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      • KCI등재

        주철에서의 Al 첨가의 효과에 대하여

        이해창 대한금속재료학회(대한금속학회) 1980 대한금속·재료학회지 Vol.18 No.4

        鑄鐵의 高張力化에 對한 硏究로서 鑄鐵의 기지조직과 機械的性質이 미치는 Aluminum添加效果에 對하여 檢討하였다. Aluminum을 少量 添加하여 添加量 變化에 依한 效果, 添加方法에 依한 效果 및 成分變化에 依한 效果와 硬度에 미치는 效果를 比較檢討하였다. 本 硏究를 通하여 얻은 結果는 다음과 같다. 1) Al添加는 接種後의 添加보다 接種과 同時의 添加가 鑄造組織 및 機械的 性質에 미치는 改良 效果가 더 크다. 2) Al添加量은 0.75%添加時가 가장 우수한 鑄造組織과 機械的性質을 나타낸다. 3) 同一 Al添加量의 경우에, 分離 添加한 경우가 機械的性質이 더 良好하며 이는 Al 接種效果를 보다 效果的으로 도와주는 데 기인된다. 4) 同一 C.E.의 경우, 珪素量이 적을수록 黑鉛化에 必要한 Al 添加量은 증대한다. For the study of strengthened of cast iron, the effect of aluminum on the structure and mechanical property has been investigated with variation of the amount of aluminum addition. It is studied for the addition of aluminum to the effect of addition method, addition amount, variation of composition, and mechanical property. Through this study, following results are obtained. 1) Aluminum addition before inoculation are more effective on microstructure and mechanical property than after inoculation. 2) 0.75% addition of Aluminum is the best of microstructure and mechanical property. 3) In case of same amount of Aluminum addition, separate addition is more effective in mechanical property and due to Aluminum that helps the inoculation effectively. 4) In case of same C.E., the less silicon content the more increase amount of Aluminum required in graphtization.

      • KCI등재

        Selective laser direct patterning of indium tin oxide on transparent oxide semiconductor thin films

        이해창,Zhenqian Zhao,권상직,조의식 한국반도체디스플레이기술학회 2019 반도체디스플레이기술학회지 Vol.18 No.4

        For a wider application of laser direct patterning, selective laser ablation of indium tin oxide (ITO) film on transparent oxide semiconductor (TOS) thin film was carried out using a diode-pumped Q-switched Nd:YVO4 laser at a wavelength of 1064 nm. In case of the laser ablation of ITO on indium gallium zinc oxide (IGZO) film, both of ITO and IGZO films were fully etched for all the conditions of the laser beams even though IGZO monolayer was not ablated at the same laser beam condition. On the contrary, in case of the laser ablation of ITO on zinc oxide (ZnO) film, it was possible to etch ITO selectively with a slight damage on ZnO layer. The selective laser ablation is expected to be due to the different coefficient of thermal expansion (CTE) between ITO and ZnO.

      • KCI등재

        Physicochemical and organoleptic characteristics of deep-fat fried and microwaved potato chips

        이해창,황금택,최희돈,임학태 한국응용생명화학회 2015 Applied Biological Chemistry (Appl Biol Chem) Vol.58 No.5

        This study was carried out to examine the effects of deep-fat frying and microwaving on various physicochemical parameters and sensory characteristics of potato chips. The moisture content of deep-fat fried potato chips was found to decrease faster than that of microwaved chips during the cooking process. The fat content of the deep-fat fried potato chips increased with increasing frying time, while that of microwaved chips changed little. Microwaving was found to increase the hardness and lower the acrylamide content of the chips. Microwaving also resulted in chips with a lower browning index and a lighter color than deep-fat fried chips. Although deep-fat fried chips were found to be superior in terms of appearance, color, and overall acceptability, no significant differences were determined in the taste and crispiness between deepfat fried and microwaved potato chips. Our findings indicate that microwaving as a cooking method has the potential to yield potato chips with low acrylamide levels, low fat content, and a desirable texture. Microwaving can therefore be considered a suitable method of preparing potato chips for modern people who consume excessive fats and oils and are interested in healthier and high-quality products.

      • KCI등재

        Effects of Carnosine Supplementation on Carnosine Concentrations in Muscles and Blood Biochemical Indices of Rats

        이해창,김미영,최창순,김영남,한찬규,이복희 한국축산식품학회 2012 한국축산식품학회지 Vol.32 No.5

        This study evaluated the effects of carnosine supplementation on carnosine concentration in muscles and blood biochemical indices of rats. Thirty-two eight-week-old Sprague-Dawley male rats were randomly divided into a control group (CON) as well as three carnosine-treated groups. The carnosine-treated groups included groups fed diets composed of 0.01% carnosine (LC), 0.1% carnosine (MC), and 1.0% carnosine (HC). Body weight gain, food intake, feed efficacy rate,protein efficacy rate, and organ weights were not significantly different among the groups. In all groups, the mean carnosine levels in gastrocnemius muscles were higher than the mean carnosine levels in soleus muscles. Carnosine concentrations in soleus muscles and gastrocnemius muscles were significantly higher in the HC group compared to all other groups (p<0.05). Serum triglyceride and LDL-cholesterol concentrations in all of the carnosine-supplemented groups were significantly lower than those of the control group (p<0.05), while HDL-cholesterol levels were significantly higher than those of the control group (p<0.05). Aspartate aminotransferase levels in rats supplemented with carnosine were significantly higher than those of the control group. In conclusion, diets supplemented with high levels of carnosine can increase carnosine concentrations in skeletal muscles, which might contribute to increased exercise capacity. Furthermore, these findings suggest that high levels of dietary carnosine improve the lipid profile of rats by lowering blood LDL-cholesterol and increasing HDL-cholesterol levels.

      • KCI등재

        주관적 계층 의식과 재분배 정책 선호도: 인지된 불평등의 매개효과

        이해창 한국사회정책학회 2022 한국사회정책 Vol.29 No.4

        This study analyzed the effects of the individual’s subjective socioeconomic status(SES) to the attitudes toward the redistribution policy, mediated by the perceived inequality, through structural equation modeling(SEM). Since the countries’ welfare systems and ideologies have significant influence on the preference of policies, the cross-country analysis was conducted(Sweden, Germany, USA, and South Korea), referencing to the classification of the welfare states by Esping-Andersen(1990). The findings are as follows. Firstly, the size of the indirect effect of the subjective SES to the preference of redistribution was nearly half of the total effect. Secondly, the lower the individual’s subjective SES, the higher the level of perceived inequality of opportunity and outcome, the perceived unfairness of the inequality, and the preference of the redistribution. At third, the effects of subjective SES were biggest in Sweden and smallest in South Korea. At fourth, the perceived inequality of opportunity had the greatest influence on the perceived inequality of outcome and the preference of the redistribution in USA. Finally, the perceived unfairness showed the biggest effect on the perceived inequality of outcome in South Korea. Also, the perceived inequality of outcome had the biggest influence to the preference of the redistribution in South Korea. These results could contribute to the better understanding of the key factors on the preference of the redistribution in South Korea, reflecting the demands of Koreans to the actual implementation of the government policies. 본 연구는 개인의 주관적 계층 의식이 불평등 인식에 매개되어 재분배 정책 선호도에 미치는 영향을 구조방정식(structural equation modeling)을 통해 분석하였다. 구조방정식은 변수들이 각 국가에서 동일한 개념을 측정했는지에 대한 정보를 제공해 줄 뿐만 아니라, 여러 변수 간 복잡한 인과 관계를 종합적으로 고려하기에 국가 간 비교 연구에 널리 활용되는 통계적 방법이다. 예측변수인 정책 선호도가 국가의 복지 체계 및 이념에 많은 영향을 받기에, 본 연구는 Esping-Andersen(1990)의 분류 체계를 참고하여 스웨덴, 독일, 미국, 한국을 대상으로 국가 별 비교를 수행했다. 주요 연구 결과를 살펴보면 다음과 같다. 첫째, 주관적 지위가 불평등 인식을 통해 재분배 정책 선호도에 미치는 간접 효과는, 불평등 인식을 거치지 않은 직접 효과와 동일한 크기를 보였다. 둘째, 개인의 주관적 지위가 낮을수록 기회 및 결과의 불평등 인식과 불공정성 인식이 높았으며, 재분배 정책 선호도가 높게 나타났다. 셋째, 주관적 지위의 영향력은 스웨덴에서 가장 크게 나타났으며, 한국에서 가장 낮게 나타났다. 넷째, 미국은 기회 불평등 인식이 결과 불평등 인식 및 재분배 정책 선호도에 미치는 영향력이 가장 컸다. 마지막으로, 한국은 공정성 인식이 결과 불평등 인식에 미치는 영향력과 결과 불평등 인식이 재분배 정책 선호도에 미치는 영향력이 매우 높았다. 이러한 연구 결과는 국제적인 맥락에서 한국의 특성을 이해하고, 추후 재분배 정책을 수립하는 데에 도움을 줄 것으로 기대한다.

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