• Annual Conference of KIPS
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• 2024.05a
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• pp.358-361
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• 2024

2010 년 UC Berkely 에서 개발한 RISC-V ISA 는 x86, Arm 과 다르게 Free Open-source 라는 장점으로 인해 많은 연구와 개발이 이루어지고 있다. RISC-V ISA 는 RISC 명령어셋을 활용하며 서버 및 데스트탑 CPU 부터 IoT 디바이스까지 여러 방면에서 상용을 위한 노력이 계속되고 있다. 하지만 상용 CPU 에 비해 부채널 공격 방어 기법이 제한적으로 구현되어 있는 것을 확인하였고 특히 부채널 공격 중 전력 분석(Power Analysis)에 대한 방어 기법이 부족한 것을 확인하였다. 따라서 본 논문에서는 RISC-V 를 포함한 여러 아키텍처에 대해 전력 분석 및 하드웨어 방어 기법을 분석하고, RISC-V에 추가적으로 적용되어야 할 방어 기법에 대해 서술한다.

• Annual Conference of KIPS
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• 2007.05a
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• pp.521-524
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• 2007

추론 기반의 온톨로지 구축은 시맨틱 웹 응용의 구현을 위한 최소 요건이다. 그러나 현재 시맨틱 웹응용에 적용된 대부분의 온톨로지들은 추론을 통한 지식의 재사용을 제공하지 못하며, 이는 시맨틱 웹응용의 발전에 많은 지장을 주는 요인이다. 따라서 본 연구는 서술 논리와 규칙 언어로 표현된 추론 기반의 웹 온톨로지를 구축하고, 이를 지능형 이미지 검색에 적용하였다. 추론 엔진을 이용한 지능형 이미지 검색 결과 실험으로, 추론 기반의 웹 온톨로지와 주석 기반의 웹 온톨로지를 이미지 검색 시스템에 적용하였으며, 추론 기반의 웹 온톨로지를 적용한 검색 결과가 재현율과 정확율에 있어 더욱 우수한 성능을 보여주었다.

• Annual Conference of KIPS
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• 2007.05a
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• pp.1520-1523
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• 2007

최근 이동사무환경에 대한 관심이 증대되고 있다. 이를 위한 '유비쿼터스 이동사무환경 시스템'의 메신저 시스템은 기존 XMPP 메신저 프로토콜을 적용할 수 있으나, 몇 가지의 제약조건이 존재한다. 본 논문은 기존의 XMPP 를 확장해 이동사무환경에 적합한 새로운 프로토콜을 설계하고, 이를 실제 구현한 랑데부 서버에 적용하였다. 새롭게 개발한 MPE-MP 프로토콜은 사무환경의 전송을 위해 XMPP의 기본 네트웍 모델인 CS (Client-Server) 모델을 사용하지 않고, P2P (Point to Point) 방식을 사용하여 사무환경 전송을 수행한다. 본 논문에서는 MOE-MP 이동사무환경 메신저 프로토콜과 이의 구현인 랑데부 서버에 대한 특징, 기능을 서술한다.

• Annual Conference of KIPS
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• 2024.10a
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• pp.1115-1116
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• 2024

우울증은 전 세계적으로 심각한 정신 건강 문제로 자리 잡고 있다. 개선을 위해서는 적절한 관리와 치료가 필요하지만, 경제적, 사회적 이유로 정신건강 의학과를 이용하지 못하는 비율이 높다. 따라서 본 논문에서는 LLM을 활용하여 우울증의 조기 진단 및 관리 서비스를 개발하고자 한다. 기존 우울증 자가 진단의 정량적 설문 방식을 개선하여, AI를 활용한 서술형 분석을 통해 사용자가 자신의 감정을 더욱 세밀하게 표현하고 진단받을 수 있도록 지원한다. 또한 사용자의 감정 상태를 추적하고, 운동 및 명상 등의 활동을 추천함으로써 우울감 및 우울증 증상을 완화하는 데 도움을 줄 수 있는 맞춤형 서비스를 제공한다.

• Annual Conference of KIPS
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• 2024.10a
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• pp.447-450
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• 2024

궤도상 서비싱(On-Orbit Servicing)이란, 우주 공간의 궤도에서 비행하는 인공 물체를 대상으로 상태를 점검 및 수리하거나 궤도 수정 또는 궤도 내 자세 유지, 연료 재급유, 부품 교체, 우주 쓰레기 제거 등을 제공하는 서비스이다. 이는 위성 수명 연장 및 재사용성 증대를 통한 인적, 시간적 비용절감 결과를 가져온다. 이러한 임무를 수행하기 위해서는 대상이 되는 객체를 안전하게 고정하고 유지하는 캡처 및 도킹 과정이 필요하며 데이터는 실시간 모니터링으로 감지한다. 이때, GNC(유도, 항법, 제어) 시스템의 프레임워크는 항공우주 분야에서 우주 비행체가 임무를 수행할 때 필수적인 기능을 통합하고 관리하며 수행하는 구조적 틀을 제공한다. 센서, 알고리즘, 제어기, 항법 장치 등 연관된 하드웨어와 소프트웨어가 유기적으로 작동하도록 구성되어 있으며 비행체가 목표를 정확히 수행하도록 돕는 핵심적인 역할을 한다. 본 논문에서는 기존 궤도상 서비싱의 해외 연구 현황을 파악하여 임무 사례를 통한 GNC 시스템 프레임워크의 분석을 토대로 추후 국내 궤도상 서비싱 GNC 서브시스템 프레임워크 설계 시 적용 방안에는 어떤 것이 있을지에 대하여 연구한 내용을 서술하고자 한다.

• Annual Conference of KIPS
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• 2024.10a
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• pp.56-59
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• 2024

증가하는 클라우드 서비스에 대한 보안 위협에 대응하기 위해 데이터를 암호화한 상태로 연산을 수행하는 동형암호에 대한 연구가 활발히 진행되고 있다. 동형암호는 암호화된 상태로 처리를 진행하기에 데이터 유출 위협으로부터 자유로우나, 2¹⁰ 차 이상의 다항식에 대해 연산을 수행해야 되기에 많은 양의 연산 자원과 메모리 자원을 필요로 한다. 본 논문에서는 이러한 동형암호 연산의 특성과 이를 실용적으로 사용하기 위한 가속기 개발 연구들에 대해 서술하였다.

• CHINESE LITERATURE
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• v.95
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• pp.129-153
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• 2018

《說苑》是一部西漢末葉劉向編撰歷史故事的典籍. 編撰的主要目的在於提供皇帝的閱覽. 劉向爲 了達成編撰的目的往往使用了文學的敍述方法, 由於如此理由 《說苑》裡面含有很多的文學成分. 所 以這篇論文的寫作意圖在於探究 《說苑》裡面的文學的性質. 硏究的結果如此: 《說苑》所含有的諸多文學性當中有詩歌文學·傳記文學·說文學方面的可 注目的成就. 由於劉向受了家風的影響, 他熟悉了 《詩經》, 因此他常常引用了 《詩經》裡面的詩歌. 特別是他 在比喩和誇張的修辭方面活用了 《詩經》活用得很好. 所以通過所要傳達的文學的表現, 他不但達成 了自己的編撰目的, 而且更加提高了 《說苑》的詩歌文學的性質. 因爲 《說苑》含有衆多人物的論和行迹, 於是不過 《說苑》是一部收集人物的傳記的典籍. 通 過敍述各種人物的生涯當中可注視的行和逸話, 《說苑》不但提高了人物的聲價, 而且在文學方面 描述了人物的性格·人品·智慧等描述得很好, 因此 《說苑》可以說達成了傳記文學的成就. 《說苑》雖然在根本上努力傳達了歷史的事實, 但是爲了達成勸戒的效果, 它有時候要表現得事 實不一樣. 因此 《說苑》裡面多有說的因素包括虛構·想像·遺聞逸事·民間傳說什麽的. 甚至於 一部分故事具有說的內容和構造. 這種成果讓我們更加注視 《說苑》的說方面的成就.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.37 no.4
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• pp.1-10
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• 2019

The purpose of this study is to examine the design ＆ construction methods of the traditional landscape space of the past and the repair and maintenance of cultural heritages to maintain it today. To this end, the method of narrative description, process extraction and construction related to traditional landscaping were compared to each other based on the 『Imwongyeongjeji』 「Seomyongji」 and 'Standard Specification for Repairing Cultural Heritages'. The results are as follows; First, to analyze at the description methods of the 『Imwongyeongjeji』 「Seomyongji」 and 'Standard Specification for Repairing Cultural Heritages' and related processes in the field of traditional landscaping. 『Imwongyeongjeji』 「Seomyongji」 was an encyclopedia of the overall construction method of the living space, describing the location, effect, and advantages and disadvantages of each component and presenting quantitative figures to institutionalize the construction of traditional landscaping spaces. 'Standard Specification for Repairing Cultural Heritages' presented the entire process of repairing cultural heritages, and it is becoming a kind of guide for reference at the site. Among them, foundation construction, roof construction, landscape construction, and fence construction were drawn as items that could be applied to traditional landscaping areas. Second, the traditional landscape space construction method was divided into the processes of foundation construction, roof construction, landscaping construction, and fence construction. Foundation construction is a way of repeating the process of land-tramping. During the construction of the roof, the tile-roofed building was built on top of the rafters and roofed with tiles. And thatched roof was made to a number of rice straws bundles to cover the roof one after the other. Instead of tiles, the stone roof was made of thin and wide stones, and the wooden boards were used for the single roof and the bark roof were constructed with many layers of dried corrugations. Landscape construction mainly consists of the Paving technique through tramping rubble and the construction of terraced flower by planting stone, plants, and shrubs on the top. According to the building materials, the wall construction was derived from the earth-stacked earthen wall, stone walls using stone and clay, marble walls made of tile patterns, and the construction of a board wall using a wood board as a wall. Third, comparing the construction methods of the 『Imwongyeongjeji』 「Seomyongji」 and 'Standard Specification for Repairing Cultural Heritages', 『Imwongyeongjeji』 「Seomyongji」 focuses on standardizing the construction methods to create a new traditional space. There is a difference in the setting of the scope of the 『Imwongyeongjeji』 「Seomyongji」 and the construction because 'Standard Specification for Repairing Cultural Heritages' provides the overall construction procedure considering the diversity of the cultural heritages. In addition, the traditional landscape space used to be a residential space in the past, but today, the maintenance process of the already established facilities as designated cultural heritages has been carried out, and construction methods have been added to create viewing conditions. In terms of the succession of traditional knowledge, some similar methods were found in the repair of cultural assets today, and some cases were also confirmed in the reconstruction of traditional technologies such as application of some materials or mix, separation of added facilities and introduction of efficient construction methods.

• KDI Journal of Economic Policy
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• v.30 no.1
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• pp.171-209
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• 2008

The Great Depression is one of the most important economic incidents in the twentieth century. A significant and long-lasting impact of this event is the rise of the government intervention to the economy. Under the catastrophic downturn of the economic condition worldwide, people required their government to play an active role for economic recovery, and this $mentalit{\acute{e}}$ prolonged even after the Second World War. Social science textbooks taught at Korean high schools mostly referred to the Great Depression for explaining the reason of government intervention in economy. However, the mainstream view commonly found in the textbooks provides a misleading theological interpretation. It argues that inherent flaws of the market economy causes over-production/under-consumption, and that this mismatch ends up with economic crisis. The chaotic situation was resolved by substitution of the governments for the market, and the New Deal was introduced as the monumental example ('laissez-faire economy ${\rightarrow}$over-production${\rightarrow}$the Great Depression${\rightarrow}$government intervention${\rightarrow}$economic recovery'). Based on economic historians' researches for past three decades, I argue that this mainstream view commits the fallacy of ex-post justification. Unlike what the mainstream view claims, the Great Depression was neither the result of the 'market failure', nor the recovery from the Great Depression but was due to successful government policies. For substantiating this claim, I suggest three points. First, blaming the weakness or instability of the market economy as the cause of the Great Depression is groundless. Unlike what the textbooks describe, the rise of the U.S. stock price during the 1920s cannot be said as a bubble, and there was no sign of under-consumption during the 1920s. On the contrary, a new consensus emerging from the 1980s among economic historians illustrates that the Great Depression was originated from 'the government failure' rather than from the 'market failure'. Policymakers of European countries tried to return to the gold standard regime before the First World War, but discrepancies between this policy and the reality made the world economy vulnerable. Second, the mainstream view identifies the New Deal as Keynesian interventionism and glorifies it for saving the U.S. economy from the crisis. However, this argument is not true. The New Deal was not Keynesian at all. What the U.S. government actually tried was not macroeconomic stabilization but price and quantity control. In addition, New Deal did not brought about economic recovery that people generally believe. Even after the New Deal, industrial production or employment level remained quite low until the late 1930s. Lastly, studies on individual New Deal policies show that they did not work as they were intended. For example, the National Industrial Recovery Act increased unemployment, and the Agricultural Adjustment Act expelled tenants from their land. Third, the mainstream view characterizes the economic order before the Great Depression as laissez-faire, and it tends to attribute all the vice during the Industrial Revolution era to the uncontrolled market economy. However, historical studies show that various economic and social problems of the Industrial Revolution period such as inequality problems, child labor, or environmental problems cannot be simply ascribed to the problems of the market economy. In conclusion, the remedy for all these problems in high school textbooks is not to use the Great Depression as an example showing the weakness of the market economy. The Great Depression should be introduced simply as a historical momentum that had initiated the growth of government intervention. This reform of high school textbooks is imperative for enhancing the right understanding of economy and history.

• Education of Primary School Mathematics
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• v.16 no.3
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• pp.229-250
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• 2013

The purpose of this study is analyzing 'observation and recommendation letter by teacher', which is being submitted to screen and enhance the utilization of gifted students in accordance with recently introduced gifted students observation, recommendation and screening system. For the purpose, this study will provide with objective securing plan of 'observation and recommendation letter by teacher' by developing an optimum evaluation model. The research findings were as follows: First, the result of analysis on the mathematically gifted students behavior characteristic as appeared in 'observation and recommendation letter by teacher' suggested that the recommending teachers have the tendency of giving superficial statement instead of giving concrete case description. When it was analyzed for frequency by the 'observation and recommendation letter by teacher' analysis framework devised by the author, the teachers showed the tendency of concentrating on specific questions. Meanwhile, there was a tendency that teachers concentrate on specific gifted behavior characteristic or area for which concrete case had been suggested. The reason is believed that such part is easy to observe and state while others are not, or, teachers did not judge the other part as the characteristic of gifted students. Second, the gifted students behavior characteristics as appeared in 'observation and recommendation letter by teacher' were made into scores by Rubric model. When the interrater reliability was analyzed based on these scores, the correlation coefficient of 1st scoring was .641. After a discussion session was taken and 2nd scoring was done 3 weeks later, the correlation coefficient of 2nd scoring increased to .732. The reason is believed that; i) the severity among scorers was adjusted by the discussion session after the 1st scoring, ii) the scorers established detail judgment standard on various situations which can appear because of the descriptive nature, and, (iii) they found a consensus on scoring for a new situation appeared. It implies that thorough understanding and application of scorers on evaluation model is as important as the development of optimum model for the differentiation of mathematically gifted elementary students.