금속-세라믹 코어-쉘 복합체에 담지된 Ni 금속 촉매를 적용한 CO₂ 메탄화 반응 특성연구

이현주,한도현,이두환,Lee, Hyunju,Han, Dohyun,Lee, Doohwan 한국청정기술학회 2022 청정기술 Vol.28 No.2

Microstructured Al@Al₂O₃ and Al@Ni-Al LDH (LDH = layered double hydroxide) core-shell metal-ceramic composites are prepared by hydrothermal reactions of aluminum (Al) metal substrates. Controlled hydrothermal reactions of Al metal substrates induce the hydrothermal dissolution of Al ions at the Al-substrate/solution interface and reconstruction as porous metal-hydroxides on the Al substrate, thereby constructing unique metal-ceramic core-shell composite structures. The morphology, composition, and crystal structure of the core-shell composites are affected largely by the ions in the hydrothermal solution; therefore, the critical physicochemical and surface properties of these unique metal-ceramic core-shell microstructures can be modulated effectively by varying the solution composition. A Ni/Al@Al₂O₃ catalyst with highly dispersed catalytic Ni nanoparticles on an Al@Al₂O₃ core-shell substrate was prepared by a controlled reduction of an Al@Ni-Al LDH core-shell prepared by hydrothermal reactions of Al in nickel nitrate solution. The reduction of Al@Ni-Al LDH leads to the exolution of Ni ions from the LDH shell, thereby constructing the Ni nanoparticles dispersed on the Al@Al₂O₃. The catalytic properties of the Ni/Al@Al₂O₃ catalyst were investigated for CO₂ methanation reactions. The Ni/Al@Al₂O₃ catalyst exhibited 2 times greater CO₂ conversion than a Ni/Al₂O₃ catalyst prepared by conventional incipient wetness impregnation and showed high structural stability. These results demonstrate the high effectiveness of the design and synthesis methods for the metal-ceramic composite catalysts derived by hydrothermal reactions of Al metal substrates.

실리콘 관통형 Via(TSV)의 Seed Layer 증착 및 Via Filling 특성

이현주,최만호,권세훈,이재호,김양도,Lee, Hyunju,Choi, Manho,Kwon, Se-Hun,Lee, Jae-Ho,Kim, Yangdo 한국재료학회 2013 한국재료학회지 Vol.23 No.10

As continued scaling becomes increasingly difficult, 3D integration has emerged as a viable solution to achieve higher bandwidths and good power efficiency. 3D integration can be defined as a technology involving the stacking of multiple processed wafers containing integrated circuits on top of each other with vertical interconnects between the wafers. This type of 3D structure can improve performance levels, enable the integration of devices with incompatible process flows, and reduce form factors. Through silicon vias (TSVs), which directly connect stacked structures die-to-die, are an enabling technology for future 3D integrated systems. TSVs filled with copper using an electro-plating method are investigated in this study. DC and pulses are used as a current source for the electro-plating process as a means of via filling. A TiN barrier and Ru seed layers are deposited by plasma-enhanced atomic layer deposition (PEALD) with thicknesses of 10 and 30 nm, respectively. All samples electroplated by the DC current showed defects, even with additives. However, the samples electroplated by the pulse current showed defect-free super-filled via structures. The optimized condition for defect-free bottom-up super-filling was established by adjusting the additive concentrations in the basic plating solution of copper sulfate. The optimized concentrations of JGB and SPS were found to be 10 and 20 ppm, respectively.

CO₂ 하이드레이트의 film형 결정성장 거동에 관한 연구

이현주,김수민,이주동,김양도,Lee, Hyunju,Kim, Soomin,Lee, Ju-Dong,Kim, Yangdo 한국결정성장학회 2013 한국결정성장학회지 Vol.23 No.2

지구 온난화의 대표적인 주범인 $CO_2$를 저감하기 위하여 많은 연구가 진행되고 있다. 특히 가스 하이드레이트 형성원리를 이용한 $CO_2$ 분리 및 저장 공정이 주목을 받고 있다. 본 연구는 필름형 $CO_2$ 하이드레이트의 결정성장 거동에 관하여 성장 메커니즘을 규명하였다. 다양한 압력조건에서 반회분식 교반 반응기를 이용하여 $CO_2$ 하이드레이트를 형성시켰으며 객체가스의 용해도 차이를 최소화하기 위하여 모든 실험에서 온도는 고정하였다. 공급된 가스는 순도 99.999 %의 $CO_2$ 가스를 사용하였고, CCD 카메라(Nikon DS-5M/Fi1/2M-U2)가 장착된 광학현미경을 사용하여 관찰 결과를 실시간 기록하였다. 실험에 적용되는 압력에 따라서 하이드레이트 성장형태와 성장속도는 매우 큰 차이를 보였다. 특히 2.0 MPa 이상의 압력에서 가장 큰 변화를 관찰하였으며, 이것은 $CO_2$의 농도 차이와 모세관 힘에 의한 것으로 사료된다. Many researches have been carried out to reduce and/or to capture the major global warming gases. Especially, the hydrate formation mechanisms were intensively investigated for carbon dioxide sequestration and storage process applications. In this study, the characteristics of film-type crystal growth mechanism of carbon dioxide hydrate were comprehensively examined. Carbon dioxide hydrate crystal was formed in semi-batch type stir reactor at various pressure conditions while the temperature was fixed to be constant to reduce and minimize the guest gas solubility effects. A supply gas composition was 99.999 % of Carbon dioxide, the observation data was collected by optical microscope adopted CCD camera (Nikon DS-5M/Fi1/2M-U2). This study revealed that the guest gas pressure changes significantly altered the crystal growth mechanism and film growth rate of carbon dioxide hydrate crystal. The critical pressure of the carbon dioxide hydrate of crystal growth mechanism change was found to be 2.0 MPa. The capillary force and gas concentration gradient also significantly changed the film-type crystal growth mechanism of carbon dioxide hydrate crystal.

다중데이터링크 기반에서 데이터링크 처리기와의 데이터 무결성 보장을 위한 전술상황전시기 간 데이터 기록 및 재생 방법 연구

이현주,정은미,이성우,염재걸,김상준,박지현,Lee, Hyunju,Jung, Eunmi,Lee, Sungwoo,Yeom, Jaegeol,Kim, Sangjun,Park, Jihyeon 디지털산업정보학회 2017 디지털산업정보학회논문지 Vol.13 No.2

Recently, the high performance of tactical situation display console and tactical data links are used to integrate the operational situations in accordance with information age and NCW (Network Centric Warfare). The tendency to maximize the efficiency of task execution has been developed by sharing information and the state of the battle quickly through complex and diverse information exchange. Tactical data link is a communication system that shares the platform with core components of weapons systems and battlefield situation between the command and control systems to perform a Network Centric Warfare and provides a wide range of tactical data required for decision-making and implementation.It provides the tactical information such as tactical information such as operational information, the identification of the peer, and the target location in real time or near real time in the battlefield situation, and it is operated for the exchange of mass tactical information between the intellectuals by providing common situation recognition and cooperation with joint operations. In this study, still image management, audio file management, tactical screen recording and playback using the storage and playback, NITF (National Imagery Transmission Format) message received from the displayer integrates the tactical situation in three dimensions according to multiple data link operation to suggest ways to ensure data integrity between the data link processor during the entire operation time.

다중 센서 데이터를 활용한 시약장 위험상황 식별 시스템

이현주,최형욱,정회경,Lee, Hyunju,Choi, Hyungwook,Jung, Hoekyung 한국정보통신학회 2018 한국정보통신학회논문지 Vol.22 No.1

최근 실험실에서 발생하는 안전사고가 다양한 형태로 발생함에 따라 실험실의 안전사고를 줄일 수 있는 시스템이 요구되고 있다. 기존 시스템은 온도, 습도의 변화에 따라 위험상황을 식별하지만 위험상황의 유형을 알 수 없고 기기의 동작이 수동으로 이루어지는 단점이 있다. 이에 본 논문에서는 다중 센서를 활용하여 시약장의 위험상황을 식별하고 기기를 자동으로 동작시키는 시스템을 제안한다. 시약장의 내부 환경은 센서들을 통해 실시간으로 측정되며 센서 데이터는 위험상황을 식별하는 것에 활용된다. 또한 위험상황이 식별되었을 경우 이에 맞는 기기를 선택하고 자동으로 동작시킨다. 이와 같이 시약장의 위험상황을 식별하고 기기를 자동으로 동작시킴으로써 시약장에서 발생하는 안전사고를 줄일 수 있을 것으로 사료된다. Recently, safety accidents that occur in laboratories have occurred in various forms, so that a system that can reduce safety accidents in laboratories is required. The existing system identifies the danger situation according to the change of the temperature and the humidity, but the type of the danger situation is not known and the operation of the device is manually performed. Therefore, in this paper, we propose a system that identifies the danger situation of a reagent cabinet using multiple sensors and automatically operates the device. The internal environment of the reagent cabinet is measured in real time through the sensors and the sensor data is used to identify the danger situation. Also, when a danger situation is identified, the appropriate device is selected and operated automatically. In this way, identification of the danger situation of the reagent cabinet and automatic operation of the device will reduce the safety accidents occurring in the reagent cabinet.

동래부 화원 李時訥 연구

이현주(Lee Hyunju) 부산경남사학회 2010 역사와 경계 Vol.76 No.-

This paper aims to research on Lee Si-Nul(李時訥) who served as a painter in Dangraebu(東萊府 畵員) district in the 19th century. Lee Si-Nul's family originally came from Beokjin(碧珍) and his pseudonym(號) is Songam(松菴). He filled various military posts in Dongraebu district in the 19th century such as Pachong in Janggwancheong(將官廳 把摠); Gungigamgwan in Beolgungwancheong(別軍官廳 軍器監官); Baekchong in Jakdaecheong(作隊廳 百摠); Baechong in Sucheopcheong(守堞廳 百摠). His works are largely classified into three kinds of paintings according to the purpose and orderers, which are documentary paintings for the use of the government offices, the on-demand paintings from Japan, the paintings for appreciation from private interaction. His documentary painting which remains now is 〈Imjinjeonrando: Imjin War painting〉(壬辰戰亂圖). Most of the on-demand paintings from Japan, which bear the mark of Joseon(朝鮮) and the signature of his pseudonym, Songam, are inherited generation to generation in Japan. Among them, Songhodo(松虎圖), Eungdo(鷹圖), and the landscape of southern school style(南宗畵 山水) remain today. The subjects of the paintings for appreciation are various compared with the quantity such as Nonggawolryeongdo(農家月令圖) in the landscape style; Seowonajipdo(西園雅集圖) which applied the tradition of Gosado - a painting of an old story - in China(中國 故事圖); the paintings of the four gracious plants(Sagunja, 四君子) and grape vines drawn in black and white(Mukpododo, 墨葡萄圖) in the literary artist's style. The documentary paintings for the use of the government offices highlight regional characteristics while the paintings for appreciation strongly reflect the style in the same period like Kim Hong-Do(金弘道) and Jeong Sun's(鄭?). This paper postulates the paintings of dispatched painters in each province from Dohwaseo, Drawing & Painting Authority in the late Joseon Dynasty and the ones dispatched to Dongraewegwan(東萊倭館) for the nexus of relationship with the Central Authority of Drawing & Painting. Then, it has examined the regional styles of paintings in the correlation between Byeon Bak(卞璞) and Byeon Gon(卞崑) who worked in Dongraebu district in the 18-19th century and the paintings in Dongraebu. Furthermore, this article has attempted to tell the distinct characteristics of Dongraebu district as a painting-making place in the respect that the private paintings for appreciation got a sense of Japanese style and the paintings in Dongraebu were related to the style and works of escort painters in Tongsinsa, a diplomatic delegation in Joseon.

ODA사업 평가 참여 전문가의 경험에 관한 연구

이현주(Lee, Hyunju),김숙연(Kim, Sukyeon) 충북대학교 국제개발연구소 2017 사회적경제와 정책연구 Vol.7 No.3

본 연구는 ODA사업 평가 참여 전문가의 주관적 경험을 이해하려는 목적으로 수행되었다. ODA사업 평가에 참여한 경험이 있는 전문가 6명을 대상으로 한 심층면담을 통해 자료를 수집하였으며, ODA사업 평가를 경험을 객관적 현상이 아닌 주관적인 경험으로 이해하고자 질적 연구접근으로 분석하였다. 분석결과 의미 있는 진술을 45개의 개념으로 개념화 하였고, 이후 유사개념을 결집하여 16개의 하위범주, 5개의 범주를 도출하였다. 최종 도출된 5개의 범주는 ‘공정성’, ‘결과 신뢰성’, ‘적절성’, ‘현장성’, ‘관계성’이다. 이러한 분석결과를 통해 ODA사업 평가 참여시 문제점과 개선사항 등에 대한 전문가의 생각을 알 수 있었으며, ODA사업 평가 시 발생할 수 있는 문제점 및 해결방안 등에 대한 정책적 방안을 제언하였다. This study was conducted to understand the subjective experience of evaluation participating expert for ODA projects. The data was collected through in-depth interviews with six experts who have experience in ODA projects evaluation, and qualitative research was analyzed to understand the subjective phenomena rather than objective phenomena. The results analysis, methodological statements were conceptually interpreted as 46 concepts. And then the combinatorial issues were analyzed and categorized them into sixteen sub-themes and five themes. The final five categories are the fairness, the result reliability, the propriety, substantiality and the relationship. Through the analysis results, evaluation participating experts for ODA projects were able to identify the expert opinion on problems and improvements. And this study provides policy alternative for possible problems and solutions that can arise during ODA projects evaluation.

수집, 기록, 확장: 아카이브 실천으로서 디자인 전시

이현주(Lee Hyunju) 한국디자인사학회 2023 Extra Archive: 디자인사연구 Vol.- No.7

지난 2020년과 2022년 국립현대미술관 과천에서 개최했던 두 개의 전시, 《올림픽 이펙트: 한국 건축과 디자인 8090》(2020.12.17.- 2021.4.11.)과 《모던 데자인: 생활, 산업, 외교하는 미술로》(2022.11.23.- 2023.3.26.)는 아카이브를 기반으로 각각 1980년대에서 1990년대, 그리고 1930년대 말에서 1960년대에 이르는 한국의 디자인, 시각· 물질 문화의 풍경을 다각도로 조망하고자 기획되었다. 공공미술관에서 이처럼 특정 분야의 전시를 기획한다는 것은 예술의 한 장르로서 가치를 획득하기 위한 논의를 촉발함과 동시에 미술관이라는 제도 공간이 과거의 기율로부터 벗어나 새로운 장을 모색할 수 있는가에 관한 질문을 던지는 일이라는 점에서 도전적이다. 이 글은 미술관이라는 제도 내에서의 디자인, 디자인 소장품과 아카이브, 그리고 디자인사 연구의 매개로서 아카이브 기반의 디자인 전시 사례를 되짚어 본다. 또한 《모던 데자인》을 중심으로 아카이브라는 구체적이고 물질적 기록들이 발굴, 수집, 연구되어 다시 전시의 형태로 재현되는 과정에서의 여러 논점과 방법론을 공유하고 다양한 목소리로 발화되는 디자인사 연구를 촉발하는 아카이브 실천으로서 전시의 역할과 가능성을 살펴보고자 한다. Two exhibitions at the National Museum of Modern and Contemporary Art, South Korea (MMCA, Gwacheon) in 2020 and 2022, “Olympic Effect: Korean Architecture and Design 8090” (December 17, 2020 - April 11, 2021) and “Modern Design: The Art of Life, Industry, and Diplomacy” (November 23-26, 2023) are based on archives, which are designed to view the landscape of Korean design, visual, and material culture from various angles, from the 1980s to the 1990s, and from the late 1930s to the 1960s, respectively. Curating an exhibition in a specific field in an Art Museum is challenging in that it triggers discussions to acquire value as a genre of art and at the same time asks whether the institutional space of the museum can break away from the past discipline and seek a new chapter. This article looks back on the case of archivalbased design exhibitions as a medium for design, design collections and archives, and design history research within the system of an Art Museum. In addition, I would like to share various issues and methodologies in the process of discovering, collecting, and researching specific and material records of archives, focusing on the “Modern Design” exhibition, and to examine the role and possibilities of the exhibition as an archive practice that triggers research on design history from various perspectives.

조직 정체성을 중심으로 본 병원의 혁신

이현주(Lee, HyunJu),김광점(Kim, Kwang-Jum) 대한경영학회 2012 大韓經營學會誌 Vol.25 No.4

영한 병렬자료에서 부정문의 긍정문으로의 번역 양상

이현주(Hyunju Lee) 부경대학교 인문사회과학연구소 2023 인문사회과학연구 Vol.24 No.1

이 논문은 영어 부정어 ‘no', 'not', 'never'이 포함된 영어 부정문이 한국어 긍정문으로 번역되는 양상을 살펴보는 것을 목적으로 한다. 이를 위해 『The Catcher in the Rye』, 『The Kite Runner』, 『Life of Pi』, 『River Boy』의 영어 소설과 한국어 번역본『호밀밭의 파수꾼』,『연을 쫓는 아이』, 『파이 이야기』,『리버보이』의 영한 병렬 자료에서 발췌한 자료를 대상으로 반의어와 유의어를 기준으로 나누어 번역되는 양상을 조사하였다. 먼저 반의어를 사용하여 긍정문으로 표현되는 경우를 주어의 의도 강조, 부정의 선택적 변조 차원에서 관점의 변화, 그리고 어휘의 단순화로 나누어 분석하였다. 첫째, 주어의 의도를 강조하기 위해 부정문이 긍정문으로 번역됨을 알 수 있었다. 이는 부정문에 내재된 모호함을 제거하고 화자의 의도를 분명하게 강조하여 드러내기 위해 긍정으로 나타낸 것이다. 이를 통해 메시지를 강조할 수 있음을 확인할 수 있었다. 둘째, 부정의 선택적 변조를 통해 달라진 관점의 변화로 메시지를 강조하여 전달할 수 있음을 알 수 있었다. 동일한 메시지의 효과적인 전달을 위해 부정문의 반의어를 사용하여 긍정문으로 형태에 변화를 주는 선택적 변조가 사용되었다. 이러한 주어를 바꾸는 선택적 변조를 통해 달라진 관점의 변화를 반영하여 긍정으로 표현함으로써 메시지를 강조하여 전달할 수 있음을 확인하였다. 셋째, 어휘의 단순화는 복잡한 부정표현 대신 짧고 단순한 어휘의 긍정표현을 사용하여 의미적 등가를 이루는 것이다. 따라서 부정어가 삽입된 복잡한 원천텍스트를 번역에서는 단순한 긍정 어휘인 한 단어로 집약하여 메시지를 분명하게 전달함으로써 한국어 화자에게 더욱 자연스러운 한편, 메시지를 강조하여 전달하기 위해 긍정문으로 번역된 것이다. 다음으로 유의어를 사용해 긍정문으로 번역된 사례는 부정문을 수사의문문을 통해 긍정문으로 번역함으로써 비난이나 자조어린 감정 등의 암시적인 부정의 의미를 표면적인 긍정문에 함축함과 동시에 메시지를 강조할 수 있음을 알 수 있었다. 이와 같이 부정문의 반의어와 유의어를 사용해 부정을 긍정으로 번역하는 선택적 변조를 통해 도착어 독자의 빠른 이해를 돕고, 메시지를 강조하여 전달할 수 있음을 확인하였다. The purpose of this study is to examine the English-Korean translation phenomenon in which the English negative sentences including ‘no’, ‘not,’ and ‘never’ were translated into Korean positive sentences. The parallel sentences were extracted from both the English version and the translated Korean version of “The Catcher in the Rye”, “The Kite Runner”, “Life of Pi”, and “River Boy”. The translation of English negative sentences into Korean positive sentences was examined by dividing it into antonym and synonym. In the case of translation using antonym, the emphasis on the subject's intention, the change of perspective in terms of optional modulation of negatives, and the simplification of vocabulary were examined. First, it was found that the negative sentences were translated into positive sentences to emphasize the subject's intention. Second, through optional modulation of negation, the message can be emphasized by changing perspective. In order to effectively convey the same message, the form was changed to positives using the antonym of negative sentences through optional modulation. Third, the purpose of the simplification of vocabulary is to achieve semantic equivalence by using the short and simple positive expressions of vocabulary instead of complex negative expressions. Therefore, in Korean translation, the source text with the negator is aggregated into one simple positive word, and thereby the message is clearly expressed. Next, it was found that the message was emphasized by using the synonym of the negative sentence and making a positive rhetorical question. Through the rhetorical question, it was found that negative sentences could be translated into positive sentences to emphasize messages or contain negative meanings such as criticism or self-deprecation feelings in positive sentences. Therefore, these negative expressions are translated positively using antonym and synonym of negative sentences to help readers understand the text quickly by emphasizing the message.