노동 행정학의 체계 정립에 관한 연구

이목훈(Lee Mohk-Whun) 서울행정학회 1998 한국사회와 행정연구 Vol.9 No.2

객체지향 데이타베이스 시스템에서의 의미적 질의 최적화

이영훈(Lee Young Whun),유석인(Suk I. Yoo) 한국정보과학회 1995 정보과학회논문지 Vol.22 No.6

객체지향 데이타베이스 시스템에서의 질의는 서브클래스 관계성, 참조 관계성, 객체 식별자등의 객체지향 규준이 표현되는 복잡한 객체 질의이다. 이러한 객체 질의에 대한 의미적 질의 최적화 기법의 적용에 대한 필요성은 증대되고 있으나, 이에 대한 연구는 미진하다. 본 논문에서는 객체지향 데이타베이스에서의 의미적 제약조건의 표현과 전파에 대해 고찰하고, 이를 기반으로 객체 질의를 위한 의미적 질의 최적화 기법을 제시한다. 매우 큰 질의 탐색 공간에 대해서 유용한 의미적 질의 변환을 유도하는 변환 휴리스틱들을 제시한다. 또한 객체 질의 최적기 원형 MagicVol을 사용하여 제시된 의미적 질의 최적화 기법의 유용성을 입증한다. Semantic query optimization becomes more important in OODB systems where object queries are complex due to presence of the object-oriented concepts such as subclassing relationship, is-part-of relationship, and object-identifier. However, there are few research works on them. In this paper we investigate the representation and propagation of semantic constraints and present a semantic query optimization technique for object queries. We also develop new transformation heuristics which guide useful transformations in the search space for semantic transformations of object queries. Using an object query optimizer prototype MagicVol, we conduct preliminary optimization experiments to verify that our semantic query optimization techniques are reasonable and useful.

노무현 정부에 대한 좌-우 이념논쟁의 성격 탐색

이목훈(Mohk Whun Lee) 서울행정학회 2005 한국사회와 행정연구 Vol.16 No.1

This paper aims to understand the characteristics of the current disputes between the right political group and the ruling political party. Last year some people who had performed the left student movement in the 1980s openly proclaimed their ideological change from the left position to the right and formed the civic group called "new right". The new right group named the ruling political party and the Roh Muhyun government as "for the north, against the U.S." group and Roh Muhyun version of the proletariat dictatorship. And then they said they would orient the "small government - large market" to guard the freedom. It raised the so-called ideological dispute between the left and the right group. This paper shapes the new ideological map of the right. left, and the middle to analyze the ideological disputes. The right orient the marketism and hierarchy (growth-oriented), the left orient the statism and equality(redistribution-oriented), the middle orient the marketism and equality. The major findings are that the ruling party and the current government are located in the middle in terms of the ideological map. The "new right" group's criticism against the government is only political strategy to gain their own political support. This type of political dispute is useless in the point of political development and national interest.

객체지향 질의어의 설계

이영훈(Young-Whun Lee),유석인(Suk I.Yoo) 한국정보과학회 1994 정보과학회논문지 Vol.21 No.6

많은 객체지향 데이타베이스 시스템들은 선언적인 질의어대신 절차적인 객체지향 데이타베이스 프로그래밍 언어에 의해 객체를 순항적으로 접근함으로서 데이타베이스를 검색하고 있다. 본 논문은 이러한 절차적인 언어에 의존하지 않고 데이타베이스를 검색할 수 있는 객체지향 질의어, OQL++(Object Query Language++)를 제시한다. OQL++는 객체들의 집합을 질의 단위로 하여 다양한 형태의 중첩 질의, 경로 수식, 집합 연산을 제공하며, 복합 객체, 객체 식별성, 클래스, 클래스 계층, 클래스 구성 계층, 메쏘드, 캡슐화 등의 객체지향 규준을 지원한다. 또한 질의 결과는 객체 이름에 의해 지속성을 부여받는다. In most object-oriented database systems, database retrievals are made through navigational accesses of objects by procedural object-oriented database programming languages instead of declarative query languages. In this paper, we present a new object-oriented query language, referred to as OQL++(Object Query Language++), by which database retrievals are made nonprocedurally it deals with collections of objects and provides a variety of nested query forms, path expressions, and set operations. It supports object-oriented paradigm, such as complex object, object identity, class, class hierarchy, class composition hierarchy, method, and encapsulation. Furthermore, results of queries can be made persistent through object names.

Changes of Specifc Activity and Regulation of Nitric Oxide Synthase during Liver Regeneration after Partial Hepatectomy

(Hyang Woo Lee),(Dong Wan Seo),(Suk Woo Nam),(Young Jin Lee),(Dae Seok Sung),(Jung Whan Han),(Sung Whun An),(Young Kwun Ko) 한국응용약물학회 1996 학술대회 Vol.1996 No.1

두경부 선양낭성암종에서 원격전이와 관련된 임상적, 병리학적 예측 인자

성명훈(Myung Whun Sung),권택균(Taek Kyun Kwon),이상준(Sang Joon Lee),김광현(Kwang Hyun Kim),김정훈(Jeong Whun Kim) 대한두경부종양학회 2002 대한두경부 종양학회지 Vol.18 No.2

Background and Objectives : Adenoid cystic carcinoma (ACC) is a unique tumor characterized by frequent and delayed distant metastasis (DM) with uncommon regional lymph node metastasis. We evaluated the factors affecting DM of ACC and survival after appearance of DM. Materials and Methods : Medical records, radiographs and pathologic slides were reviewed for 94 patients from 1979 through 2001. Results : DM of ACC occurred in 46 patients, and developed more frequently in patients with tumors of the solid histologic subtype than in patients with tubular or cribriform subtypes. DM occurred less frequently in the sinonasal tract, and development of DM was not affected by tumor stage. Disease-specific 5- and 10-year survival rates were 88% and 72% for patients without DM, respectively and 76% and 48% for those with DM (p=0.02). Regarding the site of DM and its impact on outcomes, 30 patients had lung metastasis alone, 5 patients bone metastasis alone and 6 patients developed both lung and bone metastasis. Median survivals after appearance of DM among patients with isolated lung metastases and those with bone metastases with or without lung involvement were 54 and 21 months, respectively (p=0.04). Conclusions : Development of DM in ACC is predicted by solid histologic subtype, and major salivary gland or oral/pharyngeal rather than sinonasal primary site. Those patients with bone involvement with our without lung metastases had worse outcomes than those with pulmonary metastasis only.

탈질소화 미생물의 분리 , 동정 및 활성에 관한 연구

송준상,이길철,이인선,김원덕,이장훈 한국물환경학회 1992 한국물환경학회지 Vol.8 No.1

In order to isolate and identify the microbiological strains, which can remove nitrogen, from samples of soil, return sludge of wastewater treatment plants, river water and river sediments and to determine their nitrogen removal activities, this research was performed. The results are summarized as follows: 16 strains which could have denitrification activities were isloated from 36 samples. According to morphological and biochemical results, 14 strains were identified to Pseudomnas sp., and 1 strain to Bacillus sp. and 1 strain to Micrococcus sp.. The strains indentified as Pseudomonas sp., have the high activities of denitrification and degradation of organic compounds, can be used in wastewater treatment plants for the purpose of upgrading the treatment rate. The strians, isloated from this study, grew well at the anoxic state and the average growth rates of cell dry weight per a day were 6.0㎎/ℓ (1st day), 7.0㎎/ℓ (2nd day), l0.0㎎/ℓ (3rd day). Denitrification rates according to incubation day were 40% at Ist day, 60-90% at 2nd day and more than 90% at 3rd day. Removed nitrate nitrogen per cell dry weight was 1.7988gNO₃-N/gMLVSS/day at 1st day, 0.852gNO₃-N/gMLVSS/day at 2nd day, 0.224gNO₃-N/gMLVSS/day at 3rd day. Nitrogen removal activity at 1st and 2nd day was high, but at 3rd day was decreased because of high cell dry weight and low NO₃-N concentration in culture vessel.

태아간 혈구형성에서 거대핵세포의 발달과 이주

이원복(Won Bok Lee),이창훈(Chang Whun Lee),정봉수(Bong Soo Chung),김범수(Bum Soo Kim),김대진(Dea Jin Kim),김성수(Sung Soo Kim),김경용(Kyung Yong Kim) 대한해부학회 2002 Anatomy & Cell Biology Vol.35 No.4

태령 제11주부터 제23주에 이르는 5예의 태아간을 대상으로 연속초박절편을 이용한 투과전자현미경 관찰을 통하여 거 대핵세포형성세포의 발육, 거주와 이주과정 등을 관찰하여 다음과 같은 결론을 얻었다. 1. 거대핵세포형성세포는 대부분 동굴주위공간이나 동굴모세혈관벽의 내피밑 구역에 위치하였지만 일부에서는 이주된 세포가 동굴모세혈관 속공간에서도 관찰되었다. 2. 거대핵모세포는 세포핵비율이 높고 하나의 큰 핵과 한 두 개의 뚜렷한 핵소체를 가지며 핵막은 함몰되어졌다. 세포 질에서는 미성숙한 세포소기관이 산재하였으며 세포막은 작은 융모성돌기와 긴 세포질돌기들이 자주 발견되었다. 미성숙 거대핵세포가 성숙하면서 핵은 분엽화가 일어나고 세포질은 구역화와 특이 과립의 출현, 경계막계통의 형성 등이 일어나 면서 성숙되었다. 3. 일부 거대핵세포는 동굴모세혈관 벽의 내피세포를 관통하고 있거나 이미 이주되어 동굴모세혈관 속공간에서 관찰되 기도 하였다. 또한 미성숙 거대핵세포의 세포질에서는 미성숙 적혈구모세포나 세망적혈구가 포함되어있는 엠페리폴레시 스도 확인되었다. 이상을 종합하면 태아간 거대핵세포형성에서 미성숙 거대핵세포의 위치는 대부분 혈관주위공간이며 일부에서는 동굴 모세혈관 속공간에서도 거주하면서 혈관속거대핵세포형성과 혈관밖거대핵세포형성에 의해 특징적으로 계속적인 성장과 정을 밟을 수 있다. Liver tissuses obtained from 5 human fetuses between 11 weeks and 23 weeks of gestation during the high activity of hepatic hemopoiesis were observed with transmission electron microscope using continuous series of thin sections. The objective of present study was to evaluate ultrastructures of megakaryopoietic cells, the migration of extravascular megakaryocyte into the sinusoidal lumen and the relevence between a migrated megakaryocyte and a Kupffer cell. Immature megakaryocytes were usually observed between growing hepatic laminae and within hepatic sinusoids. A megakaryoblast contained numerous polyribosomes, rather large mitochondria, short tubular elements of rough endoplasmic reticulum and small granules. Moreover, demarcation tubules and a few small specific granules were observed in immature megakaryocytes. The nucleus was mononuclear but frequently indented. With maturation, the nuclei were multilobulated. In the cytoplasm, in contrast to the decrease in polyribosomes and rough endoplasmic reticulum, the numerous specific granules and well-developed demarcation membrane system were predominant. Thereafter cytoplasmic zonation was observed clearly in maturing and mature megakaryocytes. Some megakaryocytes passed through the sinusoidal lining epithelium and into the hepatic sinusoids. The cell to cell interaction was often found as adhesion between migrated megakaryocyte and Kupffer cell, and erythroblasts within megakaryocyte (emperipolesis). These results suggest that intravascular megakaryopoiesis in addition to extravascular megakaryopoiesis occurs to produce platelet during the human fetal liver.

진행성 하인두암에서 선행화학요법과 방사선요법

이효정(Hyo Jeong Lee),심우섭(Woo Sub Sim),이명철(Myung Chul Lee),박범정(Bum Jung Park),성명훈(Myung Whun Sung),노종렬(Jong Lyel Roh),김광현(Kwang Hyun Kim),성원진(Weon Jin Seong) 대한두경부종양학회 2002 대한두경부 종양학회지 Vol.18 No.1

Background and Objectives: To evaluate the efficacy of the neoadjuvant chemotherapy and radiation therapy in treatment of patients with advanced hypopharyngeal cancer, which is notorious for its poor prognosis and severe surgical morbidity with functional deficits. Materials and Methods: Medical records and radiologic findings of 107 patients with squamous cell carcinoma of the hypopharynx, Stage III or IV (AJCC, 1997), were retrospectively reviewed. Results: Neoadjuvant chemotherapy followed by radiation therapy showed 74% complete remission (CR) rate. The patients who did not show CR after chemotherapy had a high likelihood of treatment failure, even though they achieved CR following subsequent radiotherapy. Twenty-eight of 57 patients were able to preserve their larynges for more than three years by chemotherapy and radiation. Conclusions: This approach appeared to be as effective as radical surgery with postoperative radiation therapy without comprising of survival. To improve the cure rates, we need to develop better strategies to increase CR rates with chemotherapy and determine the best treatment option for patients who are partially or nonresponsive to chemotherapy.

레티놀 크림 ⅠㆍⅡ의 피부자극성 및 안점막자극성에 관한 연구

강병철(Byeong-Cheol Kang),이나래(Na-Rae Lee),권은아(Euna Kwon),강창길(Chang-Gill Kang),정희원(Hee Won Jeong),박상영(Sang-Young Park),이상구(Sang-Koo Lee),이국현(Kook-Hyun Lee),성명훈(Myung-Whun Sung),정진호(Jin Ho Chung) 한국실험동물학회 2002 Laboratory Animal Research Vol.18 No.4