슬립추정 센서리스 벡터 제어기

한상수,Han, Sang-Soo 한국정보통신학회 2010 한국정보통신학회논문지 Vol.14 No.10

A sensorless vector control of an induction motor provides a good performance in the middle and high speed region. However, in the low speed region, it is very difficult to implement the sensorless vector controller because the feeding voltage measured by the motor is very low. In this paper, we designed the sensorless vector controller of an induction motor using the estimate of the slip frequency. To verify the performance of the proposed controller, an experiment has been performed. 유도 모터의 센서리스벡터 제어시스템은 모터의 시정수를 이용하여 자극의 위치를 추정하는 제어 시스템으로서 중 고속영역의 경우 벡터 제어가 잘 구현된다. 그러나 저속의 경우 모터로부터 얻는 전압정보가 너무 작아서 벡터 제어기의 구현이 어렵다. 본 논문에서는 슬립 주파수 추정을 이용하여 저속에서의 센서리스벡터제어 문제점을 개선시켜 광범위한 속도 영역에서 벡터제어가 가능한 센서리스 벡터제어기를 설계하였다. 제어기의 성능은 실험을 통하여 확인하였다.

하이퍼텍스트 소설 : 문학의 새로운 가능성을 향하여 Towards a New Possibility for Literature

한상수 한국현대영어영문학회 2002 현대영어영문학 Vol.46 No.3

In 1992, Robert Coover declared(I'd like rather to say "dared to" declare) in a book review whose title was "The End of Books" that the print medium, a doomed and outdated technology was destined soon to be consigned forever to "those dusty unattended museums we now call libraries." In addition, he also trumpeted a brave new future for fiction, the so-called hypertext fiction, informing the readers that the traditional novel, as we know it, has come to its end and would be replaced by the former. After his daring exclamation, hypertext fiction became one of the major subjects for discourse in literary society. This paper deals with the possibility for a new literature, on the basis that within 2020 will come a new age in which even the equivalent of a computer workstation of today might cost only a few hundred dollars. If the future will be like this, no one can expect literature to be the same as the currently read and written printed books. Definitely, literature will be changed, whatever it will be. First, In this paper I have placed an emphasis on the co-relatedness of postmodernism and hypertext fiction. I agree absolutely with George P. Landow's assertion that hypertext embodies many of the ideas and attitudes proposed by postmodernists, such as Barthes, Derrida, Foucault, and others.(Landow 73) Second, I have analyzed Michael Joyce's afternoon, a story and Darren Bleuel's Gav and Peloso's Interactive Story as representative exploratory and constructive hypertexts. Finally, I asserts that some preparations for the coming of a new kind of literature should be made immediately, even though I don't think hypertext fiction will be the ultimate form of literature.

석재의 산지유형에 의한 석조 건축물의 이미지에 관한 연구

한상수,소병근,박한규 대한건축학회지회연합회 2004 대한건축학회연합논문집 Vol.6 No.4

Histological Analysis of In Vitro Co-Culture and In Vivo Mice Co-Transplantation of Stem Cell-Derived Adipocyte and Osteoblast

한상수,최종진,이동은,장현석,정형민,문성환,강선웅 한국조직공학과 재생의학회 2016 조직공학과 재생의학 Vol.13 No.3

Many researchers have focused on the role of adipocytes in increasing efficient bone tissue engineering and osteogenic differentiation of stem cells. Previous reports have not reached a definite consensus on whether adipocytes positively influence in vitro osteogenic differentiation and in vivo bone formation. We investigated the adipocyte influence on osteogenic differentiation from adipose-derived stromal cells (ADSCs) and bone formation through histological analysis in vitro and in vivo. Using the direct co-culture system, we analyzed the influence of adipocytes to promote the differentiation fate of ADSCs. Using co-transplantation of ADSC-derived adipocytes and osteoblasts into the dorsal region of mice, the osteogenesis and bone quality were determined by histological morphology, radiography, and the measurement of the Ca2+ concentration. The adipocyte negatively affected the osteoblast differentiation of ADSCs in the in vitro system and induced osteogenesis of osteoblasts in the in vivo system through co-transplantation. Interestingly, in the co-transplanted adipocytes and osteoblasts, the bone formation areas decreased in the osteoblast only group compared with the mixed adipocytes and osteoblast group 6 weeks after transplantation. Conversely, co-transplantation and osteoblast transplantation had similar degrees of calcification as observed from radiography analysis and the measurement of the Ca2+ concentrations. Our results revealed that adipocytes inhibited osteoblast differentiation in vitro but enhanced the efficacy of osteogenesis in vivo. In addition, the adipocytes controlled the activity of osteoclasts in the newly formed bone tissue. Our approach can be used to reconstruct bone using stem cell-based tissue engineering and to enhance the understanding of the role adipocytes play.

가로변 건물의 외장재료 구성에 관한 연구

한상수,박한규 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(계획계)

This study aims to find out the composition of the architectural materials for the exterior design of the buildings in the city. To carry out this study, the field survey for the buildings of the 5 main streets in Chonju area was done. They are analyzed as their built age, function, story and materials. It is concluded that ; 1. The tile is mostly used as the architectural material in the buildings in the city. 2. As the built age, the tile is most used in the buildings that were built from 1970 to 1980, the granite and glass are more widely used in the recent buildings. 3. As the function, the tile is largely used in the kind's of daily life buildings and hospital buildings, and the glass is in the office buildings. 4. As the building story, the tile is generally used in the lower story buildings, in the middle story buildings it is chiefly used granite and glass, and in the higher story buildings, the glass is mostly used. The elevational proportion of the building, as its used materials, the 1st main material by 70%,: the 2nd material by 23,:and the 3rd material by 7% in the buildings are composed.

중국의 농정과 농업생산에 관한 연구(1) : 농정의 변화 농산물 생산 Agricultural Policy and Production

한상수,조재연,구천서 한국국제농업개발학회 1990 韓國國際農業開發學會誌 Vol.2 No.1

中國은 '49年 10月 政權樹立以後 30年間 共同生産, 共同分配 等 社會主義 計劃經濟體制를 維持하며 對西方 閉鎖政策으로 일관하여 왔었다. 이와같은 與件下에서는 自由世界經濟에 있어서 中國의 役割은 너무 적어서 관심의 對象이 되지 못하였으나 '79年以後 經濟開放化政策을 標榜한 以後 中國의 潛在力은 西方各國의 注目을 받기에 充分하였다. 韓國과는 비록 홍콩, 싱가포르等 第3國을 通한 間接交易이 이루어지고 있지만 交易量은 날로 增加趨勢에 있는데 韓國의 對中國 輸出品은 工産品이, 輸入品은 農産物이 主宗을 이루고 있으며 특히 韓國의 農業部門은 工業部門에 比하여 相對的으로 不利한 立場에 있으므로 中國의 農業에 對한 情報는 韓國의 農業發展에 有益한 資料로 活用될 수 있을 것으로 期待된다. 따라서 本 硏究는 農業政策 특히 生産體制의 變化와 農業成長의 關孫를 分析하였는바 그 主要 結果는 다음과 같다. 1. 農政의 時期區分 ㉮ 第1段階-杜會主義 準備期('49∼'52) : 社會主義 經濟體制로의 轉換을 爲한 準備段階로 國共內戰時부터 占領地域에서 地主로 부터 沒收한 土地를 農民에게 無償으로 均等히 分配하고 所有權을 認定한 土地改革을 完了하였다. ㉯ 第2段階-人民公司前期('53∼'62) : 土地, 機械, 家畜等 生産手段을 共有化하여 共同生産, 共同分配를 實施한 時期로, 初期 5年間의 集團農場規模는 農家 140∼160戶, 耕地 160㏊ 單位의 小規模였으나, '58年부터는 農, 工, 商, 學等 모든 分野를 統合하여 行政과 經營體를 一元化한 人民公司制度를 實施하였으며 集團農場의 規模는 農家 4,500∼5,000호, 耕地 4,600㏊ 單位로 大型化하였다. 이 結果 g62年 經濟는 10年 後退하여 g52年 水準으로 되었다. ㉰ 第3段階-調整期('62∼'65) : 集團農場規模의 大型化와 人民公司管理委員會의 劃一的 指示, 管理로 經濟危機에 直面한 當局은 經濟調整政策을 實施하였는데 農家 30∼50戶 單位의 生産隊를 會計單位로 集團農場의 規模를 縮小하고 土地, 家畜의 所有도 生産隊로 하여 小規模의 自留地와 副業도 認定하고 政策을 實施한 時期로 '65年에는 '57年의 經濟水準으로 까지 回復하였다. ㉱ 第4段階-人民公司後期('66∼'78) : 調整政策을 反社會主義「브르조아」路線으로 批判하는 文化大革命의 混亂속에서 資本主義殘滓라고 副業의 禁止와 自留地도 共有化하였으며 '76年 9月 毛澤東死亡後 登場한 鄧小平은 '78年 農業, 工業, 國防, 科學等 中國 4代現代化計劃을 發表한 후 '78年 12月 第11期 3中全會議에서 經濟改革政策과 더불어 人民公司制度를 廢止하였다. ㉲ 第5段階-生産責任制期('79∼ )'4代現代化計劃 達成을 爲한 外國의 資本과 技術導入等 經濟改革政策을 實施하기 시작하였으며 農業生産體制는 個別農家單位로 하여 割當量만 政府에 收買하고 殘餘量은 自由롭게 처분할 수 있는 生産責任制를 導入하였으며, 또한 土地所有權은 集團에 있으나 耕作權은 '15∼'30年 長期認定하며 作付醴系의 自由化와 5名미만의 雇傭勞動을 認定하는 等資本主義 經濟原理를 部分的으로 導入, 實施하기 시작하여 今年으로 10年이 되었다. 2. 農業政策變化에 따른 農産物 生産動向 穀物生産量 推移를 보면 '49년 113百萬톤,'58年 2億톤,'70年에는 3億톤을,'84年에는 4億톤을 넘게 生産하였는데 이와같은 生産量 增加要人은 灌漑施設 擴充, 農機械普及擴水 等 生産基盤의 造成과 土壤改良, 肥料, 農藥의 增施, 種子改良等農事技術의 發達에 起因된다고도 할 수 있으나, 社會主義 計劃經濟를 徹底히 實施한 中國은 農業政策變化에 따라 農産物生産의 起伏이 甚한데 이는 農業政策이 農産物生産에 크게 作用하였음을 立證하는 것으로 이를 要約하면 ㉮ 土地改革을 完了하고 最初의 小規模 集團農場時期('53∼'57)에는 GNP 11.3%, 農業 4.5%, 공업 18%의 高度成長을 하였으며 穀物生産은 '52年 164百萬톤에서 '57年 195百萬톤으로 18%가 增加하였다. ㉯ 集團農場을 大規模化하여 農, 工, 商, 學을 統合하여 人民公司制度를 實施한 時期('58∼'62)에는 工業은 3% 成長하였으나 GNP -0.4%, 農業 -4.3%의 마이너스成長을 하였으며 穀物生産量은 160百萬톤으로 10年前인 '52年 水準으로 後退하였다. ㉰ 調整政策을 實施한 3年間('63∼'65)에는 GNP 15.5% 農業 11.0%, 工業 17.9%의 成長을 하여 經濟는 '57年 水準으로 回復하였으며, 穀物生産量도 195百萬톤으로 '57年 水準이었다. ㉱ 生産責任制 導入以後 農産物 生産量은 急增하여 穀物의 경우 '87年 播種面積은 7.7%인 9.3百萬㏊가 減少하였으나 生産量은 오히려 32.8%가 增加한 1億톤이 增産되었으며 참깨, 땅콩, 油菜等 油脂作物은 5百萬톤에서 15百萬톤으로 約 3倍가 增産되었다. ㉲ 中國은 '49年以來 '78年까지는 食糧增産爲主政策으로 인하여 食糧作物과 經濟作物의 栽培面積比率이 約 10 : 1에서 '79年以後 作付體系를 自由化하자 食糧作物의 栽培面積은 減少하고 經濟作物의 栽培面積은 急增하고 '87年 現在 5.4 : 1로 되었으며 앞으로도 經濟作物의 栽培面積增加는 繼續될 展望이다. ㉳ 사과, 배, 감귤, 바나나등 과일의 生産量은 '◎9年以後 急增하고 있는데 '87年現在, 사과는 4,264千톤으로 1.9倍, 배는 2,489千톤으로 1.6倍 增加되었으며 특히 감귤은 8.7倍인 3,324千톤, 바나나는 무려 24倍나 增加한 2,489千톤이나 生産되었다. ㉴ 中國의 畜産은 畜力利用과 有機質 肥料의 供給源으로서 奬勵되었으며 食糧增産政策으로 草食家畜爲主이며 經濟改革以後 10年間 특히 牛乳生産이 무려 10培나 增加하였다. 3. 中國農業의 當面課題 ㉮ 最近 單位當 作物收量은 급격히 增加하였으나 農村勞動力의 過剩과 水利施設 農業機械化등 生産基盤의 脆弱性 및 低學力의 農業從事者로 因한 새로운 技術導入이 어려워 勞動生産性이 매우 낮다. ㉯ 農民들은 食糧作物栽培보다 所得이 높은 經濟作物의 栽培를 選好하고 있으며 高級食品의 消費가 急增하여 高級과 低品質農産物間의 需要不均衡이 深化되고 있다. ㉰ 農産物의 收買價格은 農民들의 作目選擇에 크게 作用하고 있으며 食料品 價格相乘은 물가앙등으로 인플레이션을 유발시키는 主要因인데 中國은 物價家定을 기하면서 11億에 가까운 人ㅁ의 食糧問題 解決을 위하여 農民의 生産意慾을 고취시키는 增産政策을 또한 實施하여야 하는 어려운 課題가 있다. ㉱ 동쪽 海岸地帶보다 서쪽 內陸이, 남쪽보다 북쪽지방의 所得이 낮은등 地域間 所得隔差의 深化로 因한 農民의 不滿이 고조되어 經濟改革政策에 疑懼心을 가지고 있어 繼續하여 農業生産性向上을 期待하기는 어렵다. The agricultural production in the socialist and communist countries is one of the emerging issues in Korea. The task of this study is to review the agricultural production changes under the different agricultural policies in China during last four decades. Data used in this study are secondary ones. A number of general conclusions can be drawn from the analysis and the important results are summarized as follows; 1. The years from 1949 to 1989 can be divided into five stages in terms of government policy and production systems. a) 1949 to 1952 : Completed land reform. b) 1953 to 1962 : Formation of agricultural producer cooperatives and people's communes. c) 1963 to 1965 : Recovery of production through economic adjustment. d) 1966 to 1978 : The great cultural revolution was carried out and the government focussed on strengthening the collective economy. e) 1979 to 1989 : Transition into private management of agricultral production, introducing the "production responsibility system". 2. The agricultural production was greatly influenced by national policy and system changes. As a result of the enlargement of the people's communes from 1958 to 1962, the economic growth and agricultural production declined to the level of 1952. Thanks to introduction of the production responsibility system, agricultural production grew rapidly, the grain production increased as high as 32.8% while the planting area decreased 7.7%. It was noticeable that the cash crops production increased remarkably since 1979 when the farmers were allowed to manage their production works by themselves.

가로변 건물 외장 재료의 구성과 이미지에 관한 연구 : 전주시를 중심으로

한상수,남해경,박한규 대한건축학회 2004 대한건축학회논문집 Vol.20 No.12

This study aims to find out the composition of the architectural materials for the exterior design of the urban buildings and their facade Image. To carry out this study, the field survey for the buildings of the 5 main streets in Chonju area was done And each one of the exterior building materials of the selected 15 buildings were investigated by a specialist group and non-specialist group They were analyzed as their built age, function, story and materials and their image It is concluded as followings 1 The tiles are mostly used as the building facade materials 2 As the built age, the tiles are chiefly used in the buildings that were built from 1970 to 1980, the granite and glass are more widely used in the recent buildings 3 As the function, the tiles are largely used in the kinds of daily life buildings and hospital buildings, and the glasses are in the office buildings 4 As the building story, the tiles are generally used In the lower story buildings, however in the middle story buildings granite and glasses are generally used. And in the higher story buildings, the glass is mostly used The compositional proportion of the buildings, as its used materials, are 70%, 23% and 7% respectively It is shown that the image of cool and modernness is taken with the buildings of glass, steel, timber and aluminum made And the buildings of red brick, tile, dry-bite and concrete have their own Images of warm together with the images of physical properties In the process of architectural design, the design of its exterior materials will be applied as its physical properties and images

스리랑카의 농업현황

한상수,박광호 한국국제농업개발학회 1993 韓國國際農業開發學會誌 Vol.5 No.2

The paper was aimed to review an overall trend of agriculture in the Sri Lanka particular in cultivated crop. This country was located on the southern region of the India. The Sri Lanka had a population of 17 million in 1991 being of population increase with 1.5% per year. Of these population, a farm population was of 52% in 1990. Also, this country has two distinct seasons having rainny and monsoon seasons and a mean temperature is around 27℃ which might be adequated to cultivate crops. Meanwhile, total area of cultivated land is around 1.3 million ha and major products in agriculture have been rice, coconut, tea, and rubber. Also, major export crops in Sri Lanka are tea, rubber and coconut while rice, barley, wheat, sugar and fiber are major import crops.

Zung Self-Rating Depression Scale을 이용한 일부 수도권 의대생과 공대생의 우울증 유병률 및 관련요인

한상수,이순영,이승엽,최원식,김성진,박샛별 대한가정의학회 2009 Korean Journal of Family Medicine Vol.30 No.7

Background: It is a well known fact that students majoring in medicine and engineering suffer from higher stress level and depression than students in other majors. This study was done to assess the prevalence of depression and the infl uencing factors among the university students majoring in either medicine or engineering and to compare the depression prevalence between the two groups. Methods: The study randomly selected 640 students either majoring in medicine or engineering from two universities in Kyung-Gi province, Korea. Each of 320 students majoring in either of the two majors from each university was recruited. Among 640 students, 360 students, who were composed of 172 medical students and 188 engineering students was fi nally chosen for the analysis. The Zung Self-Rating Depression Scale was used to measure the depression state. Results: The average Zung depression score of university students was 49.2 ± 9.8. Medical students had a higher score of 52.4 ± 9.3 as compared to engineering students, who scored 46.3 ± 9.4. Overall depression rate was 42.8%. Medical students had a higher depression rate (52.3%) than engineering students (34.0%). The logistic analysis showed that infl uencing factors on depression state were sex, grade, major, stress and satisfactory sleep. The main source of stress for medical students was the grades from classes whereas job search was for engineering students. There were differences between the two groups in managing the stress. Medical students chose alcohol drinking or smoking for stress management whereas engineering students playing selected video games as their outlet. Conclusion: Medical students from urban areas seemed to be depressed more than engineering students. Their stress management methods among the subjects were drinking, smoking, and playing video games which may cause further physical and psychological problems in the future. 연구배경: 우울증은 고혈압이나 당뇨 등과 같은 만성질환들 과 마찬가지로 사회적, 신체적 장애를 일으키는 질환이다. 본 연구에서는 대학생들이 겪는 우울증 유병수준과 이에 관련된 유발요인을 파악하고자 하였다. 방법: 2008년 6월 25일부터 28일까지 경기도에 소재한 A대학 과 S대학의 의과대학생과 공과대학생 각각 160명씩, 총 640명 을 무작위로 선정하였다. 전체 대상자 640명 중 설문에 응답한 총 388명(60.6%)에서 응답 내용이 불충분한 28부를 제외한 의 과대학 학생 172명과 공과대학생 188명, 총 360명을 분석 대상 으로 하였다. 우울증에 대한 척도는 Zung Self-Rating Depression Scale을 이용하였다. 결과: 대상자의 우울증 평균 점수는 49.2±9.8점이며, 전공에 따라 의대생은 52.4±9.3점, 공대생은 46.3±9.4점으로 의대생이 공대생에 비해 통계적으로 우울증 점수가 유의하게 높았다. 우울증을 보이는 학생은 대상자의 42.8%를 차지하였는데, 공 대생에 비하여(34.0%) 의대생에서(52.3%) 우울증 유병수준이 유의하게 높았다. 우울증에 영향을 미치는 요인에 대한 로지 스틱 회귀분석 결과, 성별, 학년, 전공, 스트레스, 수면만족도 가 유의한 영향을 미치는 것으로 나타났다. 의대생과 공대생 의 주요 스트레스 원인은 의대생의 경우 성적문제, 공대생은 취업문제였으며, 학업으로 인한 스트레스는 유의한 차이가 없었으나, 스트레스 해소 방법은 두 집단간에 유의한 차이가 있어, 의대생은 술이나 담배로, 공대생은 오락이 가장 많은 스 트레스 해소법이었다. 결론: 수도권 대학생들은 우울증을 많이 겪고 있으며, 특히 의대생의 우울증 유병수준이 공대생에 비해 높았다.

12표법에 관한 연구

한상수 인제대학교 1996 仁濟論叢 Vol.12 No.2