고각 환형 암시야 주사투과전자현미경기법과 투과전자현미경기법을 이용한 상용 청색 발광다이오드의 종합적인 구조분석

김동엽,홍순구,정태훈,이상헌,백종협,Kim, Dong-Yeob,Hong, Soon-Ku,Chung, Tae-Hoon,Lee, Sang Hern,Baek, Jong Hyeob 한국재료학회 2015 한국재료학회지 Vol.25 No.1

This study suggested comprehensive structural characterization methods for the commercial blue light emitting diodes(LEDs). By using the Z-contrast intensity profile of Cs-corrected high-angle annular dark field scanning transmission electron microscope(HAADF-STEM) images from a commercial lateral GaN-based blue light emitting diode, we obtained important structural information on the epilayer structure of the LED, which would have been difficult to obtain by conventional analysis. This method was simple but very powerful to obtain structural and chemical information on epi-structures in a nanometer-scale resolution. One of the examples was that we could determine whether the barrier in the multi-quantum well(MQW) was GaN or InGaN. Plan-view TEM observations were performed from the commercial blue LED to characterize the threading dislocations(TDs) and the related V-pit defects. Each TD observed in the region with the total LED epilayer structure including the MQW showed V-pit defects for almost of TDs independent of the TD types: edge-, screw-, mixed TDs. The total TD density from the region with the total LED epilayer structure including the MQW was about $3.6{\times}10^8cm^{-2}$ with a relative ratio of Edge- : Screw- :Mixed-TD portion as 80%: 7%: 13%. However, in the mesa-etched region without the MQW total TD density was about $2.5{\times}10^8cm^{-2}$ with a relative ratio of Edge- : Screw- :Mixed-TD portion of 86%: 5%: 9 %. The higher TD density in the total LED epilayer structure implied new generation of TDs mostly from the MQW region.

서울지역 도시림 토양의 산성화와 완충능력 변화

김동엽,황인찬 ( Dong Yeob Kim,In Chan Hwang ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.2

Soil pH change is an important factor which determines soil chemical properties. It is an indicator of the effect of urban environmental pollution on soils and plant growth. The objective of this study was to assess the effect of air pollution on the soil of Seoul urban forests during the course of the air pollution being dipersed toward suburb area. Study sites were divided into four sections of concentric circles with 5㎞ interval. Soil samples were collected from A and B horizons in the urban forests, and analyzed for soil pH, soil buffer capacity, cation exchange capacity, and base saturation. Soil pH ranged from 3.96 to 5.08 for A horizon and from 4.10 to 5.25 for B horizon, which were not significantly different among the sections. However, there was a trend of soil pH lowered at the sections close to the urban center. Soil buffer capacity was lower at 0-5㎞ and 5-10㎞ sections compared to that at the outer sections. Cation exchange capacity and base saturation were not different significantly among the sections. Following the pattern of air pollutants being dispersed from urban center to suburb, soil acidification was observed at the urban forests in Seoul area. Low level of soil buffer capacity toward the urban center was an indicator of soil acidification at the urban forests.

나라꽃 무궁화 품종중 가로수용, 분화용 및지피용으로 조경적 활용도가 높은 품종 선정

강호철 ( Ho Chul Kang ),김동엽 ( Dong Yeob Kim ),하유미 ( Yoo Mi Ha ) 한국전통조경학회 2016 한국전통조경학회지 Vol.34 No.2

This study was carried out to characterize 127 recently developed cultivars of Rose of Sharon (Hibiscus spp.) in Korea and foreign Countries for landscape uses. The examined factors were growth characteristics such as tree height of a 1-year grafted plant(cm), plant type, growth habit, leaf characteristics such as shape and size, flower characteristics such as color, shape, size, and red eye during 2014 and 2015 for landscape uses. The results are obtained as follows; Hibiscus hybrid ``Daewangchun``, ``Daeil``, ``Lohengrin``, ``Yeonam``, ``Joomong``, ``Jina``, and H. syriacus ``Honggarosu`` had vigorous shoot growth and tall tree size of 100cm. New Hibiscus cultivars, Hibiscus hybrid ``Daewangchun`` and ``Daeil``, having vigorous growth, uniform plant habit, upright, and compact branches were developed through interspecific crosses between H. syriacus ``Samchully`` (♀) and H. sinosyriacus ``Seobong`` (♂). This newly developed cultivar ``Daewangchun``, ``Daeil``, ``Lohengrin``, ``Yeonam``, ``Joomong``, ``Jina``, and H. syriacus ``Honggarosu`` having tall vigorous growth d unique flower with long red eye can be used as street tree or specimen plant in landscape. Otherwise, H. syriacus ``Tamla``, ``Melrose``, ``Bidan``, ``Hi Lea``, ``Byeollee``, ``Byunghwa``, ``Mibak``, ``Hanyang``, ``Chungam``, ``Lil Kim Violet``, ``Jongmoo``, ``Eunhasu``, Hibiscus hybrid ``Saehanseo``, and Hibiscus hybrid ``Yousoon`` were selected as small tree of 30~39cm. They had dwarf form in tree seemed to be suitable for pot or flower bed planting on both indoor and outdoor conditions. H. syriacus ``Antong``, ``Chungjo``, and ``Lil Kim`` were less than 30 cm of tree size. H. syriacus ``Antong``, ``Chungjo``, and ``Lil Kim``, characterized by its compact, upright and outwardly spreading plant habit; freely branching habit; dark green-colored leaves; good garden performance. Therefore, the new cultivars with tall and small tree size were a promising cultivar as a ground covers or pot planting as woody landscape plant.

물리기반 모델링을 이용한 산사태 발생에 대한 수목의 영향 분석

김동엽 ( Dong Yeob Kim ),임상준 ( Sang Jun Im ),전근우 ( Kun Woo Chun ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-

본 연구의 목적은 물리기반의 산사태 발생 가능성 평가모델을 이용하여 실제 산사태 발생지에 대한 모의를 실시하여, 산사태 발생에 대한 수목의 영향을 정량적으로 분석하는 것이다. 평가모델로서 미국 지질조사국(USGS)에서 개발한 모델인 TRIGRS를 기반으로, 이를 산사태에 대한 수목의 수문학적 영향과 역학적 영향을 고려할 수 있도록 수정한 모델을 이용하였다. 연구대상지로서 2011년7월에 산사태가 발생한 우면산 내 3개의 소유역을 선정하였으며, 산사태 발생 당시의 강우, 지형, 토질, 수리 및 임상 특성을 산정하였다. 산사태 발생에 대한 수목의 수문학적 영향과 역학적 영향 각각에 대한 고려 여부에 따른 4가지 시나리오에 대하여 TRIGRS 모의 검토를 실시하였다. 산사태가 발생하는 것으로 모의된 영역의 상대적인 크기를 분석한 결과, 수목의 영향을 고려하지 않은 시나리오 (s1)와 수문학적 영향을 고려한 시나리오(s2)는 3개 소유역 모두에서 1%p 이하의 차이를 나타내었다. 반면, 역학적 영향을 고려한 시나리오(s3)는 s1에 비하여 유역별로 10~28%p 정도 감소한 것으로나타났다. 한편, 모의 결과의 정확도를 평가한 MSR 계산 결과, 시나리오 간에 큰 차이가 없는 것으로 나타났다. 종합적으로 연구대상지에 발생한 산사태에 있어서는 수목의 역학적 영향이 수문학적인 영향보다 상대적으로 중요하게 작용한 것으로 판단되었다. The objective of this study was to quantitatively analyze tree effects on landslide initiation by the application of a physically-based landslide susceptibility model to a landslide-damaged area. TRIGRS, as a base model developed by USGS, was partly modified to consider the hydrological and mechanical effects of trees on landslide initiation. The study areas were three small watersheds where landslides occurred in Mt. Umyeon on July, 2011. Input data for TRIGRS were estimated from the environmental conditions when landslide occurred, e.g. rainfall, topography, soil strength and hydraulic properties and vegetational properties. Four scenarios were assumed based on whether the hydrological and mechanical effects of trees were considered, respectively. Results showed there were little differences of areas simulated with FS<1 between a scenario with no tree effect, s1, and one with the only hydrological effect, s2 for the study areas. However, a scenario with the only mechanical effect, s3, simulated the smaller areas by 10-28%p than s1. Meanwhile, there were little differences of MSR, calculated for evaluating the scenario performance. Overall, the mechanical effect of trees was determined to have more critical impact on landslide initiation than the hydrological effect in the study area.

15-16세기 동남아 해상무역의 특성과 변화: 포르투갈의 진출과 영향을 중심으로

김동엽 ( Dong Yeob Kim ) 한국동남아학회 2011 동남아시아연구 Vol.21 No.2

Southeast Asia developed maritime trade from the early period due to the suitable physical and cultural conditions. The land consists of peninsular and archipelago, and located at the junction of the two monsoons in South China Sea and India Ocean. The people inherit cultural openness to receive outer influences positively. When Portuguese came to Southeast Asia in 16th century, the region had already enjoyed certain level of commercial development and sociocultural dynamics through the long time experience of interactions with outer world. The Portuguese contact to Southeast Asia was more of participation and assimilation than of conquest and rule experienced in South America. It was due to the higher level of spiritual and material civilization existed in Southeast Asia. Portuguese brought several new elements into Southeast Asia such as colonization and new weapons, Cartaz system and commercial monopoly, and Catholic mission and Casado policy. These new elements, however, did not impact much on the existing Maritime trade that played an important role to change the sociocultural structure of Southeast Asia. Even though Portuguese contact itself did not make significant differences in Southeast Asia, it was meaningful in a sense that it opened a path and left a model case for the more powerful Europeans who came soon after her.

필리핀 대학교육의 역사와 현황 그리고 개혁방향

김동엽 ( Dong Yeob Kim ),정법모 ( Bub Mo Jung ) 한국동남아학회 2012 동남아시아연구 Vol.22 No.3

The current situation of higher education in the Philippines can be summarized as the rapid increase in number of HEIs(Higher Education Institutes), the polarization of the education quality, and the current deferment of educational development. The soaring number of HEIs has been backed up by the autonomous establishment and management of private sector, and also by the marketization of higher education. Further, the quality control of higher education has been also the task of private sector, which has made the state level of control difficult. The benefit and financial support for HEIs which are selected by government tend to be focused on certain prominent schools, which accelerate the bi-polarization of higher education. In the Philippines with high poverty rate, it becomes more difficult for students from lower class to access the higher education with good quality, and the economic and social class difference becomes more solid through such an unequal educational opportunity, In response to educational issues, Philippine government has tried various remedies, however, the trial hasn`t had a significant outcome because of unsteady political will for the educational reformation and the scarce financial support. The current Aquino administration recognizes that the higher education is the key to successful economic development and to the equal society. Thus the government has actively shown the vision and has implemented the plan. Though, it still needs an attention before judging whether it draws the cooperation from the conservative political parties and it would have fruitful outcomes.

ASEAN's ICT Policy and Its Implication for East Asian Regional Integration

Dong-Yeob Kim(김동엽) 고려대학교 일민국제관계연구원 2007 국제관계연구 Vol. No.

본 논문은 아세안(ASEAN)의 정보통신정책이 동아시아 지역통합에 주는 함의를 연구하였다. 정보통신기술의 급속한 발전은 산업화 시대에서 정보화 시대로 급속한 변화를 가져오고 있다. 정보화 시대에 지역통합을 이끌 추진력은 산업화 시대의 그것과는 다른 형태를 띨 것으로 예상되며 이에 대한 적절한 대비가 요구된다. 일찍이 커뮤니케이션의 매체로서 인쇄술의 발달과 보급이 민족공동체의 형성에 지대한 역할을 담당했음을 알고 있다. 도래하는 정보화 시대에 정보통신정책의 지역적 추진을 통한 교류의 확대는 새로운 지역공통체 형성에 중요한 역할을 담당할 것이다. 정보통신기술의 발전이 가져온 글로벌 시대의 도래는 지역통합에 대한 의미와 가치에 있어서 극단적인 평가를 가능하게 한다. 지역통합의 필요성을 강조하는 측면에서는 글로벌 시대의 무한경쟁에서 약화되는 국가의 생존과 국민의 안위를 위한 전략적 선택으로서 지역공동체의 필요성을 역설한다. 지역통합의 모범적 모델로서 간주되는 유럽연합은 정보통신 분야의 협력을 통해 새로운 성장동력을 개발해 내고, 동시에 지역통합의 새로운 역량을 강화하고 있다. 유럽연합은 각종 정보통신사업을 통해 역내 네트워크를 확대하고 보편적 서비스를 강화함으로써 정보화 시대의 지역통합기반을 다져가고 있다. 또한 지역적 기술 표준화를 통하여 역내의 교류를 확대하고, 이를 세계적 기술표준으로 발전시킴으로써 글로벌 시대를 선도하고자 노력하고 있다. 40여 년의 역사를 가지고 있는 아세안은 글로벌 시대에 대비하여 새로운 변화를 모색하고 있다. 특히 1997년 이래 동아시아 지역을 휩쓴 경제위기는 아세안은 물론 동아시아 지역 국가들 간의 동아시아 지역공동체 형성에 대한 관심을 다시금 촉발시켰다. 이러한 지역통합의 움직임은 아세안+3(한, 중, 일)의 역할 증대를 통해 현실화 되고 있다. 글로벌 시대의 성장동력으로서뿐만 아니라 새로운 지역공동체 형성을 위한 기반으로서 정보통신분야의 협력에 많은 관심이 집중되고 있다. 현재 아세안과 3국 간의 정보통신관련 사업은 아세안과 개별국가라는 틀을 벗어나지 못하고 있다. 도래하는 정보화 시대의 지역통합을 대비하기 위해서는 아세안과 3국이 공동으로 참여하는 동아시아 정보사회 구축을 위한 통합된 노력이 요구된다. 이러한 노력을 통해 글로벌 경쟁에서 북미와 유럽연합에 상응하는 동아시아 지역공동체로 성장할 수 있을 것이다.

필리핀 국제결혼 이주여성의 초국가적 행태에 관한 연구

김동엽 ( Dong Yeob Kim ) 한국동남아학회 2010 동남아시아연구 Vol.20 No.2

기억의 표상에 담긴 지역성 연구: 필리핀 위안부 동상을 중심으로

김동엽 ( Kim Dong Yeob ) 한국동남아학회 2018 동남아시아연구 Vol.28 No.3

This study is to figure out the Filipino cultural identity by analyzing the image of the Philippine comfort woman statue, which was created as a representation of memories of the Filipino comfort women during the World War II. As a new approach to the field of area study, this study introduced the concept of ‘intertextuality’, which is a method of understanding texts in the field of literature. Since the comfort woman statue represents the grieved memories of the comfort women during the international war time, the analysis of the image was focused on 'femininity' and 'nationalism'. As for comparison, the Korean comfort woman statue, the Statue of Peace, was taken into the analysis. Upon analyzing, it can be seen that Filipino perception of femininity emphasizes ‘beauty’ rather than ‘purity’ that expressed in the Statue of Peace. And the Philippine nationalism expressed through the comfort woman statue can find ‘elitist and inclusive’ characteristics, unlike the ‘popular and resisting’ characteristics of Korean.

정치적 기회구조와 민주주의 공고화: 필리핀 민주화의 구조적 한계

김동엽 ( Dong Yeob Kim ) 한국동남아학회 2016 동남아시아연구 Vol.26 No.2

This paper sheds light on the process of the Philippine democratic transition and deepening in the context of changing political opportunity structure. After the democratic transition in the Philippines special attentions were given to enhance substantial democracy as including certain programs in the 1987 Constitution. Especially the clauses such as agrarian reform program, party-list system, and autonomous region of the muslim mindanao were to achieve such goal. After the democratic transition the political opportunity structure, which provides the soil of social movement to enhance substantial democracy, seems to be deteriorated in certain aspects. As a result, various programs, which intend to enhance substantial democracy in order to consolidate the Philippine’s newly achieved procedural democracy, have not been reached to their intended goals. The Philippine case reveals the structural problem of democratic consolidation, and the stern reality of the democracy in the developing world. This study is focused only on the structural aspects, but the future studies should include the actor-centered analysis in order to come up with more comprehensive diagnosis and prescription for democratic consolidation.