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에너지 소비 원단위를 기초로 한 벽면부착형 BIPV 시스템의 성능평가에 관한 연구 - 대학교 강의동 건축물을 대상으로 -
이강국,서원덕,홍원화,Lee, Kang-Guk,Seo, Won-Duck,Hong, Won-Hwa 한국교육시설학회 2011 敎育施設 Vol.18 No.6
The building integrated photovoltaic(BIPV) system has a double advantage that it reduces costs for exterior materials and PV panels. It allows the construction of a low-energy building without the need for the additional installation space. At the construction planning stage, however, it requires sufficient evaluation on the efficiency and performance. This study was performed to promote the distribution of photovoltaic power generation system by estimating the potential photovoltaic power generation capacity of the BIPV system installed on the university lecture building and by evaluating the characteristics and performances of window, spandrel and combined attachment types via the simulation of generation capacity per unit area.
디스크 부식에 의한 DTV 변화에 패드 마모가 미치는 영향 연구
이완규(Wankyu Lee),이강국(Kangkuk Lee),이인호(Inho Lee),현보원(Bowon Hyun),이성주(Seongju Lee) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
The rust judder due to the disc corrosion have been known as a serious problem on automobile. Among various sources on the rust judder of vehicle, in this paper, the influence of brake pad wear particles was investigated using rig unit and vehicle with different friction materials. Results showed that the amount of wear particles critically affected to the change of DTV and to make a contact trace on the disc surface after corrosion test. In the case of pad material with the largest wear amount, the vibration of brake pedal and steering after corrosion was strongly felt during all braking stop in contrast with wear life enhanced pad material. Furthermore, the wear amount of disc was related with the linear change of DTV by corrosion. This study shows that the occurrence level of rust judder due to friction material can be predicted at the development stage of friction material.
이강국 ( Kang Guk Lee ) 한국스페인어문학회 2014 스페인어문학 Vol.0 No.72
Muchas ciudades espanolas tienen un gentilicio que no ha derivado del toponimo actual. Por ejemplo, el gentilicio de Calatayud es bilbilitano(a) y el de Medinaceli es ocelitano(a). En el segundo capitulo averiguaremos el origen de los gentilicios de este tipo cuya forma es completamente distinta del toponimo actual. Por otro lado, muchas ciudades poseen el apodo o pseudogentilicio. Por ejemplo, a los de Gijon se les llama ‘playu’ al lado de gijoneses, Vigo se llama Ciudad olivica y Oviedo es conocida como Vetusta. En el tercer capitulo estudiaremos el origen del apodo o pseudogentilicio de varias ciudades para comprender a fondo el espanol coloquial o la vida cotidiana desde el punto de vista sociolinguistico.
이강국(Lee, Kang-Kook) 한국사회경제학회 2013 사회경제평론 Vol.- No.42
최근 경제학계에서는 경제성장의 근본요인에 관한 실증연구들이 발전되고 있고, 이를 둘러싼 논쟁이 진행되고 있다. 이 논문은 제도, 지리, 유전자 등을 성장의 요인으로 제시하는 주요한 연구들을 소개하고 이들의 한계에 대해 비판적으로 분석한다. 제도주의자들은 사적재산권을 보호하는 제도가 경제성장에 가장 중요하다고 주장하며 식민지의 서로 다른 역사를 강조한다. 한편 다른 학자들은 지리적 요인이 질병이나 농업혁명의 오랜 역사를 통해 경제성장을 큰 영향을 미쳤다고 주장하며, 최근에는 유전자와 인종에 초점을 맞추는 새로운 연구들도 발전되고 있다. 그러나 이들 모두는 경제성장의 복잡한 동학을 설명하기에는 한계가 있다. 특히 각 요인이 성장에 영향을 미치는 역사적인 인과관계에 관한 연구들이 더욱 발전되어야 할 것이다. Economists have recently developed empirical studies about fundamental causes of economic growth and related debates. This paper introduces major studies that present institutions, geography and gene as fundamental causes, and critically examines their limitations. Institutionalists argue that institutions to protect private property rights are the most essential to economic growth by emphasizing differential colonial history. However, other economists posit that geographical factors have affected economic growth via disease or history of the agricultural revolution. New studies to focus on gene and ethnic groups are being developed. But all of these have limitations in explaining complex dynamics of economic growth. In particular, they need to develop studies on causal relationships between these factors and economic growth in history.
프로필렌 카보네이트로 가소화시킨 폴리(L-락트산) 필름의 열적 및 기계적 특성
이강국(Ganggook Lee),이희민(Hee Min Lee),김영호(Young Ho Kim) 한국고분자학회 2019 폴리머 Vol.43 No.1
폴리(L-락트산)(PLA)에 프로필렌 카보네이트(PC)를 첨가하여 PLA의 낮은 파단신도와 충격강도를 개선하면서 PC가 PLA의 가소제로 작용하는지에 대한 연구를 진행하였다. 이를 위해 여러 함량의 PC가 포함된 PLA/PC 필름을 용융압착법으로 제조한 후 열중량분석기, 시차주사열량분석기, 동적기계적분석기로 열적 특성을, 만능시험기 및 Charpy 충격시험기로 기계적 물성을, 광각 X-선과 주사전자현미경으로 결정형태와 모폴로지를 분석하였다. 실험결과, PLA/PC 필름에 PC 함량이 많아짐에 따라 유리전이온도, 냉결정화온도, 용융온도가 모두 낮아지면서 결정화도가 감소하였지만, PLA 결정형태는 일정하였다. 또한 PLA/PC 필름의 항복응력, 초기탄성률 및 파단응력은 감소하였지만 파단변형률과 충격강도는 크게 증가하였다. 이러한 모든 결과들이 PC가 PLA의 가소제로 작용한다는 것을 나타내었다. Propylene carbonate (PC) was added to poly(L-lactic acid) (PLA) film in order to improve both low elongation-at-break and low impact strength, and the plasticization effect of PC on PLA was examined. PLA films containing various amounts of PC were prepared by melt pressing after melt pre-mixing, and their thermal properties were analyzed with a thermogravimetric analyzer, differential scanning calorimeter, and dynamic mechanical analyzer; mechanical properties with a universal testing machine and charpy impact testing machine; crystallinity and morphology with a wide angle X-ray diffractometer and scanning electron microscope. As the PC content in PLA/PC film increased, glass transition temperature, cold crystallization temperature, and melting temperature of PLA shifted to lower temperature and the crystallinity decreased, while the crystal form was unchanged. The yield stress, initial modulus, and tensile stress-at-break of the films decreased but the tensile strain-at-break and impact strength increased dramatically with increasing PC content. All the results indicated that PC acts as a plasticizer for PLA.
이강국 ( Lee Kangguk ) 한국스페인어문학회(구 한국서어서문학회) 2020 스페인어문학 Vol.0 No.97
Arabic-speaking Muslims stayed on the Iberian Peninsula during the 8th century. Hence, in Spanish, many vocabulary originating from Arabic remain, and among them, place names are significant. When studying the etymology of the place names originating from Arabic, their existence induces a lot of interest because their form and structure are different from their Latin origin. What we are going to cover in this paper are complex forms that can be analyzed only by understanding the Arabic syntactic structure: the ‘N+N’ structure(Calat+ayud), the ‘N+al+N’ structure(Azn+al+cázar), and the ‘(N+)Al+Adj.’ structure(Al+hambra, Guad+al+quivir). By looking at the etymological structure of these complex forms, I will try to explain the structure that is difficult to understand only with knowledge of Spanish grammar, based on the knowledge of Arabic grammar and syntactic structure.
이강국 ( Lee Kangguk ) 한국스페인어문학회(구 한국서어서문학회) 2017 스페인어문학 Vol.0 No.84
Este trabajo tiene como objetivo analizar la fiabilidad y la validez de los items gramaticales del espanol elaborados durante los tres ultimos anos en el Examen de Aptitudes Escolares de Corea. Asi, a partir del analisis de un numero total de 42 items podemos decir que el grado de fiabilidad del nivel de dificultad es consistente para cada examen. Sin embargo, en el analisis del nivel de validez hemos encontrado algunos puntos debiles que necesitan ser complementados. Por lo tanto, para fortalecer estas inconsistencias para las proximas ediciones del Examen de Aptitudes Escolares proponemos dos puntos: preguntar solo un contenido gramatical en un item y diversificar los tipos de preguntas en cada examen.