나노다공체 물성 측정을 위한 극저온(20K) 수소 BET 개발 및 응용

박재우,오현철,Park, Jaewoo,Oh, Hyunchul 한국재료학회 2017 한국재료학회지 Vol.27 No.9

With the matters of climate change, energy security and resource depletion, a growing pressure exists to search for replacements for fossil fuels. Among various sustainable energy sources, hydrogen is thought of as a clean energy, and thus efficient hydrogen storage is a major issue. In order to realize efficient and safe hydrogen storage, various porous materials are being explored as solid-states materials for hydrogen storage. For those purposes, it is a prerequisite to characterize a material's textural properties to evaluate its hydrogen storage performance. In general, the textural properties of porous materials are analyzed by the Brunauer-Emmett-Teller (BET) measurement using nitrogen gas as a probe molecule. However, nitrogen BET analysis is sometimes not suitable for materials possessing small pores and surfaces with high curvatures like MOFs because the nitrogen molecule may sometimes be too large to reach the entire porous framework, resulting in an erroneous value. Hence, a smaller probe molecule for BET measurements (such as hydrogen) may be required. In this study, we describe a cost-effective novel cryostat for BET measurement that can reach temperatures below the liquefaction of hydrogen gas. Temperature and cold volume of the cryostat are corrected, and all measurements are validated using a commercial device. In this way, direct observation of the hydrogen adsorption properties is possible, which can translate directly into the determination of textural properties.

암호화된 악성 트래픽 데이터셋에서의 nPrint의 유효성 분석

박재우(Jaewoo Park),김민수(Minsu Kim),노희준(Heejun Roh) 한국정보과학회 2023 한국정보과학회 학술발표논문집 Vol.2023 No.6

Lowenfeld의 이론을 기반으로 시각장애학생이 경험한 비대면 수업에서의 제한성 고찰

박재우(Park, Jaewoo) 한국시각장애교육재활학회 2020 시각장애연구 Vol.36 No.4

연구 목적: 본 연구는 온라인 비대면 수업이 시각장애학생들에게 미치는 제한성을 파악하고 문제해결을 위한 지원방안을 고찰하여 이들의 학습지원을 위한 기초마련에 이바지하고자 한다. 연구 방법: 본 연구는 A 대학의 시각장애학생을 대상으로 한 인터뷰를 통해 이들이 경험한 제한성을 Lowenfeld의 이론에 근거하여 개인적 측면에서 살펴보았다. 연구 결과: 첫째, 이들은 온라인 비대면 수업에서 신체정신적 피로를 경험하였고 특히 잔존시각 유지 위협의 두려움을 느꼈다. 둘째, 이들은 캠퍼스 내 공간지각의 제한과 다양한 학습 및 문화에 대한 경험의 제한성을 경험하였다. 셋째, 이들은 사회관계의 제한과 기반시설 및 변화된 정보수용 환경에 따른 학습의 어려움을 경험하였다. 결론: 첫째, 당사자들이 문제해결을 위한 역량을 발휘할 수 있도록 교수학습 및 정책의 결정기관 내 참여기회를 제공할 필요가 있다. 둘째, 행정 및 자치단체와의 연계를 통한 지원환경의 극대화와 대면·비대면의 통합적인 학습방안 및 심리사회적 문제해결을 위한 지원이 제안되었다. 셋째, 온라인 비대면 수업에서 시각장애학생들이 단절과 고립 및 배제 상황의 전환을 위해 유니버셜 디자인이 적용된 프로그램, 기반시설 확충을 통한 무장애 환경의 강화가 필요하며 이를 위한 실질적 정책 지원의 현실화 및 정책결정자의 사고 전환 요구를 제언하였다. Purpose: This study is aimed to investigate the limitations of online classes in the students with visual impairment so as to prepare the foundation to support their learning. Methode: Interviews were conducted with the students with visual impairment in A University to review their experienced limitations based on Lowenfeld’s theory. Results: First, they experienced physical and mental fatigues on online classes, especially feeling the fear to the threat to residual eyesight. Second, they experienced the limitations on space perception within the campus and on multiple learning and cultures. Third, they experienced the limitations on social relationship and difficulties in learning according to the infrastructure and changed environment to accept the information. Conclusion: First, it is necessary to provide them with participation opportunity in decision making process for learning and teaching, and policies to be able to show their competency on problem-solving. Second, multiple supports were suggested including maximization of supporting environment by connecting with administrative parties and local governments, integrative learning plans by face-to-face meetings and non-face-to-face ones, and solutions for psychosocial problems. Third, it is necessary to strengthen the environment without disability by the programs adapted by universal design and securing infrastructure so as to transform the disconnection, isolation, and exclusion of the students with visual impairment in online classes. It was proposed to realize the practical policy supports and transit the way of thinking of the policymakers.

고려 성균관의 성립과 운영

박재우 ( Park Jaewoo ) 수선사학회 2020 史林 Vol.0 No.74

King Chungseon of Koryo reorganized Kukhak into Sungkyunkam and Sungkyunkwan during the two bureaucratic reforms. The name called Sungkyun reflected the political perspective of King Chungseon. The Kukhak of King Chungryeol was established with the aim of pursuing the reconstruction of national university. Kukhak was the name used by King Seongjong, who was trying to make bureaucrats who had the Confucian education. This goal is also included in the name of the Kukjakam. The name of Kukjakam was used because it was intended to create a Confucian state by educating the sons of the country through the Confucian education. King Chungseon needed a reorganization of the bureaucracy and recruitment of human resources to implement the reform politics. Sungkyunkam and Sungkyunkwan were the terms chosen from the will to cultivate people talent. Sungkyun of the Zhouli contains the idea of cultivating talented individuals with qualities that are not excessive or lacking. This was the reason King Chungseon adopted the name of Sungkyun. In addition, Koryo had a custom of calling Kukjakam as Sungkyun. So, the term Sungkyun was not unfamiliar. The organization of the national university has also changed as the educational ideology has changed from the ideology of the sons of the country to the ideology of Sungkyun. Sungkyunkwan was made by reducing the organization of Kukhak of the King Chungryeol. King Seongjong's Kukhak and Kukjakam were established as Confucian colleges. However, King Munjong has expanded to include the Faculty of Confucian and the Faculty of Technology. King Chungryeol reorganized the Kukjakam to Kukhak to promote Confucianism, but it was a comprehensive university. The same was true of Sungkyunkam. However, Sungkyunkwan reorganized it from a comprehensive university to a Confucian college. It was reorganized into Kukjakam in King Kongmin, then became Sungkyunkwan, and was passed down to Choseon. The realistic goal of college education was to cultivate talents who can become bureaucrats through the civil service examination. So, the education system and the bureaucracy selection system had to be linked. King Yejong adopted the Song dynasty’s system and placed the Seven lectures for each major, separate from the Faculty of Confucian. The students of the Seven lectures benefited from the civil service examination if they received good grades in conduct, schoolwork, or exams. This system was established in Koryeo society. Sungkyunkwan also inherited these systems. It was because this system came out with the intention of strengthening the Confucian education, and it was suitable as the education method of Sungkyunkwan, the Confucian college.

인터넷 검색엔진 마케팅을 활용한 수출촉진 전략에 관한 탐색적 연구

박재우(Jaewoo Park),김승철(Seungchul Kim),이배(Libei) 한국무역학회 2011 한국무역학회 학술대회 Vol.2011 No.4

지적장애인과의 공동 연구 실태와 과제: 국내 학술지 연구를 중심으로

박재우 ( Park Jaewoo ) 한국지적장애교육학회(구 한국정신지체아교육학회) 2016 지적장애연구 Vol.18 No.3

본 논문은 국내 장애 연구에서 지적장애인과의 공동 연구 실태를 파악하고 분석하여 향후 연구들을 위한 과제를 제시하고자 하였다. 또한 이를 바탕으로 지적장애인들의 연구 참여를 촉진하고 이들과의 공동 연구에 이바지하고자 하였다. 이 목적으로 본 논문은 국내 학술지에 게재된 논문들을 대상으로 3단계의 선정 과정을 거쳐 총 18개의 연구 논문들을 선별하여 연구를 진행하였다. 선정된 연구 대상 논문들을 통한 국내 지적장애인과의 공동 연구의 실태와 이에 따른 과제는 다음과 같다. 첫째, 국내 지적장애인과의 공동 연구 상황은 당사자와 이들의 주변인들을 포함한 연구가 주를 이루고 있고 50세 이상 장 · 노년 지적장애인들과 공동으로 하는 연구는 극소수에 불과한 것으로 나타났다. 따라서 지적장애인 연구 참여자를 전 연령층으로 확대하여 50대 이상 장 · 노년층의 관점도 포함할 수 있는 공동 연구가 필요하다. 둘째, 국내 지적장애인과의 공동 연구 결과는 2000년대 말부터 장애인 복지 관련 학술지를 위주로 산발적으로 게재되고 있으며 그중 특수교육 분야의 학술지에서는 지적장애연구에서 주로 게재되었다. 주된 연구 주제는 주거 관련 주제를 다루는 연구들이 가장 많았고 성이나 학령기에 관련한 주제들이 그 다음으로 많았다. 이 연구들에서 참여자 모집은 주로 시설 및 기관을 중심으로 한정되었다. 따라서 특수 교육 분야의 주제들도 당사자적 관점으로 구체화 되고 분석될 수 있도록 다양한 참여자의 확보 및 접근방안이 필요하다. 셋째, 연구의 전 과정에서 지적장애인들이 자기 결정권 행사를 통한 참여와 다양한 역할 수행을 할 수 있도록 연구 방법론에서 참여자의 구체적이고 다양한 역할 규정이 필요하며 이들의 역할 분배를 위한 적극적인 연구 방법론이 필요하다. The purpose of this paper is to understand and analyze the reality of collective researches conducted with people with intellectual disabilities in the studies of intellectual disabilities, then propose tasks for future researches, and furthermore, encourage participation of people with intellectual disabilities in researches and contribute to promotion of their collective researches. With this in mind, a total of 18 researches from domestic academic journal articles were selected through 3 stages of selection process. In Korea, the reality of collective researches with people with intellectual disabilities and tasks are as follows : First, collective researches in Korea with people with intellectual disabilities are mostly composed of those involving the researchers and their acquaintances. Of those, researches on those over 50 years of age were extremely rare. It is important to expand the age range of the subjects in collective researches to cover the viewpoints of those 50 years or older. Second, collective researches with people with intellectual disabilities are sporadically published in academic journals specifically on welfare of people with disabilities, and academic journals in the field of special education mostly dealt with studies on intellectual disability. Residential issue was the most common topic followed by gender and school ages. Moreover, in collective researches with people with intellectual disabilities, recruiting participants was mostly approached by facilities and institutions. Hence, it is important to promote collective researches that actualize and handle the subjects on special education from the viewpoint of the concerned persons. Third, in the entire process of research, participating through exercise of self-determination and taking various roles build core foundation of the collective research. Therefore, in terms of research method, it is important to establish regulations on more specific and diverse roles of participants and dynamic discussions on how to distribute these roles.

MR 유체를 이용한 연속 감쇠력 가변형 댐퍼의 감쇠 유동 모델링

박재우(Jaewoo Park),임춘성(Chunseong Lim),정영대(Youngdae Jung) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

Recently MR CDC damper has been applied to semi-active suspension control system gradually. Compared to former hydraulic CDC damper, it has rapid time response performance as well as simple internal structure and wide range of damping force. In order to develop control logic algorithm which enables to take maximum advantage of unique characteristics of MR CDC damper, it is inevitable to perform a thorough investigation into its nonlinear performance. In many previous researches, MR fluid model was either simply assumed as Bingham Plastic, or a phenomenological model based on experiment was established instead to predict damping performance of MR CDC damper. These experimental flow model which is not based on flow analysis but intentionally built to fit damping characteristics, may lead to totally different results in case of different configuration or structure of MR CDC damper. In this study, a generalized flow formula from mathematical flow model of MR fluid for annular orifice is derived to analyze and predict damping characteristics when current is excited at piston valve.

[차량운동성능] 연속 가변형 충격흡수기의 감쇠성능 해석

박재우(Jaewoo Park),이동락(Dinglark Lee),백운경(Woonkyung Baek) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2

Regardless of its lower capacity than the active suspension control system, the semi-active suspension control system has been taking interest because of its absolutely higher capacity than passive suspension control system.<br/> Since the previous studies have been concentrated mostly on analytic aspect and survey on the internal structure of the shock absorber remain insufficient, the main discourse of this paper is focused on analyzing the nonlinear shock absorber which varies the damping force of semi-active suspension system and the dynamic characteristics of the solenoid valve, a sort of pressure valve, and proposing the design factors of importance.<br/>

친환경·고효율 안정화제 주입과 저서 생물의 생태기능을 활용한 오염 퇴적물 원위치 정화기술 개발

박재우(jaewoo Park) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

서브 픽셀 컨볼루션 신경망을 이용한 고해상도 색차 채널 복원

박재우(Jaewoo Park),조남익(Nam Ik Cho) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.11