상황 맥락에 따른 베트남인 한국어 학습자의 ‘요청 화행’ 수행 양상 연구-한국어 모어화자와의 비교를 중심으로-

지현진 국제한국어교육학회 2021 한국어 교육 Vol.32 No.4

The purpose of this study is to compare the pattern of the use of requests between native Korean speakers and Vietnamese Korean learners. For the analysis, a questionnaire was conducted by designing a DCT with contextual factors as variables. The respondents were university students or graduate students in their 20s living in Korea, 30 Vietnamese Korean learner and 30 native Korean speakers respectively. As a result of the study, the request of the two groups showed a significant difference in the types of ‘Query Preparatory’. And it was found that the usage patterns were different for each situation due to the influence of contextual factors. In addition, a case where the usage pattern was different between the two groups and a part where an error occurred were found. Therefore, it was argued that it is necessary to teach the proper and correct use of the request strategy for each situation. This study is meaningful in that it can be used as basic data to find out how to teach the foms of requests for Vietnamese Korean learners;-, and furthermore, it can contribute to accumulating Korean Speech act research data for each language region.

열전지의 열원 연소에 따른 전류집전체 열변형에 관한 연구

지현진,김종명,김영철,조성백,Ji, Hyun-Jin,Kim, Jong-Myong,Kim, Young-Chul,Cho, Sung-Baek 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.4

Thermal batteries are primary batteries that use molten salts as an electrolyte and employ an internal pyrotechnic source to heat the battery stack to operating temperatures, typically between 450 and $550^{\circ}C$. The unit cell of thermal batteries consists of an anode, an electrolyte, a cathode, a heat pellet and a current collector. The heat source for such batteries is typically heat pellets based on $Fe/KClO_4$. The elevated temperature by combustion of heat pellet is supposed to cause a flatness non-uniformity, buckling, with a lateral extension diameter of current collector. This paper mainly focused on the combustion and buckling model of current collector to simulate the effect of heat source. Mechanical stresses in the current collector caused by thermal stress is a critical design consideration of thermal batteries because the internal short circuit could be occurred.

[국방논단] 한국형 소대급 소형 드론 개발 및 획득 방안

지현진,조해진,서강일,김세훈 한국방위산업진흥회 2024 國防과 技術 Vol.- No.541

노년층 대상의 프로젝트형 여가 프로그램 개발을 위한 이론적 고찰

지현진 여가문화학회 2009 여가학연구 Vol.6 No.3

The purpose of the present study is to suggest an ideal leisure activity type for the elderly in our aging society and urge a change in policies set up for their leisure. To accomplish this purpose, the present study looked closely into the 'project-based leisure' proposed by Stebbins in 2005 for the elderly and provided an in-depth discussion on how this type of leisure activities can be applied to our society with reviewing of domestic and overseas studies. In sum, the project-based leisure activities mean the ones that are short in duration, less complicated, but productive. Because this type of activities are relatively free from various leisure constraints such as time, money, transportation, and health conditions, they can be recommended for the elderly in our society who do not have sufficient levels of knowledge and skills for participating in most leisure activities. Also, the project-based leisure activities are considered to have potential to make the elderly's life more healthy and active at the micro level and contribute to build a more synthetic society by establishing a more desirable social perception of the elderly at the macro level. 본 연구는 바람직한 노후 여가 프로그램의 모형을 구축하기위해 필요한 이론적 토대를 형성하는 데에 그 목적이 있다. 이러한 목적을 위해 스테빈스(Stebbins, 2005)가 노년층에게 특히 권장한 바 있는 여가유형인, 진지한 여가(serious leisure), 그리고 거기서 한단계 더 발전시킨 프로젝트형 여가(project-based leisure)의 개념을 면밀히 살펴보고, 이러한 개념들이 우리 사회 현장에서 어떻게 적용될 수 있는지 사례를 소개하고 논의해본다. 요컨대, 프로젝트형 여가는 단기간에 이루어지고, 지나치게 복잡하지는 않지만, 생산적인 활동을 말하는 것으로, 여러 제약조건들(시간, 금전, 교통, 및 건강 등)로부터 상대적으로 자유로울 수 있다는 점에서, 여가활동을 수행하는 데에 있어 필요한 지식과 기술을 충분히 보유하지 못한 경우가 빈번한 우리나라의 노년층에게 체험과 수용이 용이한 활동이 될 수 있을 것으로 판단된다. 또한, 프로젝트형 여가활동은 미시적인 차원에서는 노인 개개인의 심신과 삶을 건강하고 활력 있게 만들어 줄 것이며, 거시적인 차원에서는 노년층에 대한 새로운 사회적 상을 조성하여 연령통합적 사회를 구축하는 데 공헌할 것으로 기대된다.

전지 성능 시뮬레이션을 위한 기초 모델에 대한 연구

지현진 한국군사과학기술학회 2008 한국군사과학기술학회지 Vol.11 No.1

This paper describes the basic model and simulation results of thermal battery. Voltage and thermal analysis is a critical part of thermal-battery design because of the need to maintain the inner temperature above the electrolyte melting point. Traditionally, battery design has depended on an empirical approach, in which prototype batteries are outfitted with thermocouples and the design of subsequent batteries is refined accordingly. We have developed the basic model that allows the design engineer to configure or modify a battery, quickly conduct a thermal analysis, and efficiently review the results. Based on performance tests, the thermal-battery model was established and the effect of design parameters on battery performance was analyzed.

야전용 액체 연료개질 1 kW급 하이브리드 전원시스템 제어 연구

지현진,하상현,김영철,조성백,Ji, Hyun-Jin,Ha, Sang-Hyun,Kim, Young-Chul,Cho, Sung-Baek 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.4

A fuel cell/secondary battery hybrid power generation system could extend well beyond the efficiency and interoperability of the conventional diesel generator. The suggested power source system consists of 2.3 kW class PEMFC, 100 Ah lithium polymer battery, and two DC/DC converters by serial connection type. It was known that interoperability of sub-systems is the key factor for stable and optimal control of the hybrid power generation system. The modeling and simulation methods have been proposed to reduce the number of configurations and performance tests for components selection and select the optimized control condition of the power generation system. The control model for power source system is implemented based on the empirical formulation and carried out in the Matlab/Simulink environment. The results show that the simulation can be used to establish the algorism of prototype and increase the durability of the power source system.

촉매 지지용 다층 컵 구조를 이용한 메탄올 수증기 개질 반응 연구

지현진,이정훈,최은영,양성호 한국수소및신에너지학회 2020 한국수소 및 신에너지학회논문집 Vol.31 No.2

In methanol steam reforming, commercial catalysts in the form of pellets are mainly used, but there are limitations to directly apply them to underwater weapon systems that require shock resistance and heat transfer characteristics. In this study, to overcome this problem, a multi-layer cup structure (MLCS) was applied to support a pellet type catalyst. The characteristics of pellet catalyst supported by MLCS and the pellet catalyst supported by conventional structure (CS) were compared by the reforming experiment. In the case of MLCS, a high methanol conversion rate was shown in the temperature range 200 to 300℃ relative to the CS manufactured with the same catalyst weight as MLCS. CS shown similar characteristics to MLCS when it manufactured in the same volume as MLCS by adding an additional 67% of the catalyst. In conclusions, MLCS can not only reduce catalyst usage by improving heat transfer characteristics, but also support pellet catalyst in multiple layers, thus improving shock resistance characteristics.

여가생활주기에 따른 시간사용의 차이비교

지현진 여가문화학회 2010 여가학연구 Vol.8 No.2

The present study aims to verify the model of Leisure Life Cycle, which was proposed by Korea Culture & Tourism Institute in 2009. It used recent data from Time Use Survey, which was conducted in 2009 by Korea National Statistical Office. The study compared the time allocation ratio among four major activity categories(work, education, family, and leisure) at 3 stages of Leisure Life cycle. It also compared the time allocation ratio among nine leisure activity patterns(social, education, media, religion, cultural, sports, hobbies, purchase, and others). In addition, the time allocation ratio among four major activity categories and that among nine leisure activity patterns were examined at 3 stages of Leisure Life cycle according to major demographic factors. The findings confirmed the model of Leisure Life Cycle to be valid in light of its breakdown of ages but suggested a need for modification in the definition and interpretation of each stage of the Cycle. 본 연구는 국내 통계청이 실시한 2009생활시간조사를 이용하여, 문화관광연구원(2009)이 제시한 여가생활주기(구조와 개념)를 재검증하는 것을 목표로 한다. 이를 위해 여가생활주기 단계별로 나타나는 4개의 주요생활영역(일, 학습, 가정, 여가)별 시간구성비를 비교하고, 각 단계에 따른 9가지 여가유형별(교제활동, 일반인학습, 미디어이용, 종교활동, 관람및문화활동, 스포츠집밖활동, 취미활동, 관련물품구입, 기타활동) 시간구성비를 비교하였으며, 마지막으로 인구통계학적 변인에 따라 단계별로 나타나는 주요생활 시간구성비와 여가유형별 시간구성비도 비교하였다. 조사결과 여가생활주기모형 구조의 타당성은 입증되었으나 개념 부분에는 추가적인 논의와 수정이 요구되었다.

산화제 공급 방법에 따른 메탄올-산소 촉매연소기 특성

지현진,이정훈,최은영,양성호 한국수소및신에너지학회 2020 한국수소 및 신에너지학회논문집 Vol.31 No.1

Recently, a fuel reforming plant for supplying high purity hydrogen has been studied to increase the operation time of underwater weapon systems. Since steam reforming is an endothermic reaction, it is necessary to continuously supply heat to the reactor. A fuel reforming plant needs a methanol-O2 catalytic burner to obtain heat and supply heat to the reformer. In this study, two types of designs of a catalytic burner are presented and the results are analyzed through the experiments. The design of the catalytic burner is divided into that the O2 supply direction is perpendicular to the methanol flow direction (Design 1) and the same as the methanol flow direction (Design 2). In case of Design 1, backfire and flame combustion occurred in the mixing space in front of the catalyst, and in the absence of the mixing space, combustion reaction occurred only in a part of the catalyst. For above reasons, Design 1 could not increase the exhaust gas temperature to 750℃. In Design 2, no flashback and flame combustion were observed, the exhaust gas could be maintained up to 750℃. However, the O2 distributor was exposed to high temperatures, resulting in thermal damage.

수소·연료전지의 무기체계 확대 적용을 위한 제언

지현진 한국방위산업진흥회 2022 國防과 技術 Vol.- No.515