문서인식 시스템에서의 문자인식의 후처리를 위한 한국어 처리 시스템의 설계

양기주 동국대학교 자연과학연구원 1995 자연과학연구 논문집 Vol.15 No.-

This paper describes a Korean language processing system devised for an optical character recognition system which scans printed texts and converts textual images to computer character codes. In particular, the work described here is focused on the design of a Morphological Korean analyzer coupled with a Dependency Grammar-based Korean syntactic analyzer which receives the recognized character codes from the optical character recognition system and checks out the validity of such characters by the syntax of the sentence that those characters form. For the Morphological analysis we have developed more than 100 morphological classes. For the syntactic analyzer, we have adopted Dependency Grammar as the grammar formalism since it is difficult to analyze the sentences of Korean language via Phrase Structure Grammar (which is known to be suitable for a rigid word-order language such as English) due to the fact that Korean language is a free word-order language and has a tendency that some constituents may frequently be omitted in sentences. In out system the parsing algorithm analyzes sentences (using Chart Parsing technique) in a right-to-left scanning fashion because the governor usually occurs after its dependent in Korean language. Since the main purpose of our Korean language processing system is to check and correct the words' spelling, we included the semantic information as well as syntactic information of words so that when ambiguity arises both information can be taken into account.

문헌구조를 이용한 색인 모델에 관한 연구

양기주 동국대학교 산업기술연구원 1999 산업기술논문집 Vol.13 No.-

본 논문에서는 문헌구조의 하나의 수사구조(rhetorical structure)에 기반한 색인 모델을 제안한다. 수사구조에 기반한 색인 모델은 문헌을 구성하는 각 문장을 수사구조 형태로 표현한 후, 이로부터 중요도를 계산하여 문헌의 의미를 나타낸다고 판단된 문장을 추출한 후, 추출된 문장 집합으로부터 적합한 색인어를 선정한다. 수사구조에 기반한 색인 기법은 구문분석 절차 없이 문장간의 수사구조만으로 문서를 분석하기 때문에 언어자체에 대한 복잡한 분석과정을 피할 수 있어서 적은 노력이 소요된다. In this paper, we are proposing an indexing model of Korean texts which is based on structures of texts, expecially rhetorical structures. We extract rhetorical structures of given texts and examine the importance of such structures. Based on those calculated importance, we select the sentences which are considered more important. From such sentences, key words that represent the given documents are determined. Since our indexing model does not require phrasal analysis of every sentence in a given document unlike other indexing models, our indexing model needs less efforts and time.

성인 막성신병증의 임상적 고찰

양종오,이상주,박기현,장윤경,이강욱,서광선,신영태 충남대학교 의학연구소 2001 충남의대잡지 Vol.28 No.2

Membranous nephropathy (MN) is a glomerular disease characterized by diffuse thickening of the glomerular basement membrane without significant mesangial proliferative change and is usually manifested by the nephrotic syndrome. To evaluate the clinical and pathologic characteristics of this disease in adults, we analyzed 65 patients with primary membranous nephropathy who were diagnosed at Department of Internal Medicine, Chungnam National University Hospital from February 1986 to February 2001. The results are as follows: 1) Of total 96 patients with membranous nephropathy, 67.7% was primary MN. Hepatitis B-associated MN and lupus MN were 22.9%, and 9.4%, respectively. Median duration of follow-up was 35.1 months(0.3∼177) in primary MN, 49.6 months(2.5∼103) in lupus MN, and 35.6 months(0.5∼108) in hepatitis B-associated MN. 2) Mean age of the patients with primary MN at the time of diagnosis(43.3 years) was significantly higher than that of lupus MN(30.4 years) and HBV-associated MN(36.2 years). Male to female ratio of primary MN was 1.03:l. 3) At the time of diagnosis, 89.2% of primary MN was presented with nephrotic syndrome. Twenty seven percent of patients showed hypertension. Hematuria was found in 58.5% of primary MN patients. Azotemia was noted in 3.1 %. 4) Global sclerosis, tubular atrophy and interstitial fibrosis were noted in 39.8, 16.1 and 11.3% of primaty MN, respectively. IgG and C3 were deposited on the glomerular capillary loop in 92.7% and 29% of primary MN patients. There was no significant correlation between the electron microscopic pathologic stage and clinical findings. 5) Of 56 patients with primary MN followed more than 6 months, 50(90.9%) patients were treated with prednisolone, cyclophosphamide or cyclosporin. Complete remission was obtained in 29 patients(51.8%), partial remission in 6 patients(10.7%), and no response in 18 patients(32.1%). Of 6 patients who were not treated with immunosuppressive drugs, 3 patients showed spontaneous complete or partial remission. Three patients who did not show clinical improvement progressed to end-stage renal failure. There were no significant clinical difference including renal pathology at the time of diagnosis between the patients who showed complete or partial remission and patients who did not. In conclusion, it was difficult to predict the long-term prognosis of primary MN at the time of diagnosis, clinically. The response to therapeutic modality would be the most important to predict long-term prognosis of primary MN.

무선통신 시스템을 위한 새로운 랜덤 접속 방법

신영주,임민중,양기주 동국대학교 산업기술연구원 2009 산업기술논문집 Vol.18 No.2

유선통신 시스템에서는 TDMA 타입의 랜덤 접속 방법들이 많이 사용되지만 무선통신 시스템에서는 TDMA 타입의 랜덤 접속 방법들뿐만 아니라 충돌을 줄일 수 있는 CDMA 타입의 랜덤 접속방법들도 많이 사용된다. 만일 적절한 전력 제어가 이루어진다면 CDMA 타입의 랜덤 접속은 제한된 수의 사용자들이 랜덤 접속할 때 검출 확률을 증대시킬 수 있다. 그러나 만일 전력 제어가 정확히 되지 않는다면 CDMA 타입의 랜덤 접속 방법은 성능이 떨어지게 되고 TDMA 타입의 랜덤 접속보다 오히려 성능이 나빠질 수 있다. 이 논문에서는 CDMA 타입과 TDMA 타입의 랜덤 접속의 결합 방법인 부분적 확산 랜덤 접속 방법을 제안한다. 제안하는 방법은 정밀하지 않은 전력제어가 이루어지는 시스템에서 CDMA 타입의 랜덤 접속이나 TDMA 타입의 랜덤 접속보다 우수한 성능을 낼 수 있다. While TDMA-type random access techniques are popular in wired communication systems, CDMA-type random access techniques are used as well to reduce collisions for wireless communications. If proper power control is applied, CDMA-type random access can increase detection probabilities with limited number of access users. However, if power control is not precisely performed, the performance of CDMA-type random access is degraded and can be worse than that of TDMA-type random access. In this paper, we propose partial spreading random access, which is a combination of CDMA-type and TDMA-type random accesses. The proposed method can outperform both CDMA-type and TDMA-type random accesses for partially power-controlled systems.

이동통신 시스템의 용량 증대를 위한 지능형 중계기

임민중,김시형,양기주 동국대학교 산업기술연구원 2009 산업기술논문집 Vol.18 No.2

이동통신 시스템에서 음영지역을 해소하고 커버리지를 증대시키기 위한 방법으로 중계기가 널리 사용되고 있다. 중계기는 기지국이 인식하지 않아도 되므로 기존의 시스템에서 쉽게 설치될 수 있다는 장점이 있으나 시스템 용량 증대 효과는 제한적이다. 음영지역 해소와 커버리지 증대와 함께 시스템 용량 증대를 위하여 다중홉 릴레이가 제안되었다. 그러나 다중홉 릴레이는 기지국이 그 존재를 인식해서 그에 맞추어 동작해야 한다는 단점이 있다. 이 논문에서는 기지국이 중계기의 존재를 인식하지 않으면서도 시스템 용량을 증대시킬 수 있는 지능형 중계 시스템을 제안한다. Repeaters are widely used to eliminate shadow areas or to expand cell coverage in mobile communication systems. While repeaters are transparent to base stations and allow easy deployment with existing systems, they cannot increase system capacity substantially. In order to achieve large system capacity in addition to shadow area elimination and cell coverage expansion, a mutli-hop relay is proposed. However, base stations need to recognize the existence of multi-hop relays and need to operate accordingly. In this paper we propose an intelligent repeater, which is transparent to base stations but can considerably increase system capacity.

Use of Bayesian Theory for Ambiguity Resolution of Korean Morphological Processing

YANG, GI-JOO 동국대학교 자연과학연구원 1996 자연과학연구 논문집 Vol.1 No.-

Since Korean is an agglutinative language in which inflection of words turns out in various forms, thorough examination of words is necessary to achieve complete understanding of words and sentences. In this paper we propose a method that resolves the ambiguity of words that can be easily found in the process of morphological processing of Korean language. However, unlike other approaches which have used only the statistical information obtained from corpus through counting the occurrence of each usage, our method uses structural syntactic information which is based on Bayesian theory to resolve the ambiguity of words. Our method improves the judgement basis from which appropriate meaning of words can be selected.

영화 Preview Showing System 개발

양기주,김승수 동국대학교 산업기술연구원 2000 산업기술논문집 Vol.11 No.1

영화 Preview Showing System은 영화에 관한 다양한 정보를 사용자가 쉽게 접하도록 하기 위하여 개발되었다. 이 시스템은 MPEG 플레이어와 멀티미디어 데이터베이스, 그리고 효율적인 데이터 전송을 위한 가변적 데이터 전송 기법으로 구성되어 있다. MPEG 플레이어는 MPEG 스트림을 재생하기 위하여, 멀티미디어 데이터베이스는 MPEG 파일을 관리하기 위하여 개발되었다. 마지막으로 가변적 데이터 전송 기법은 서로 다른 네트워크 환경에서 접속한 사용자에게 최적화된 성능을 보장하기 위하여 구현되었다. 이 시스템은 사용자의 편의를 위하여 MS Windows와 Linux 플랫폼에서 각각 개발되었다. Movie Preview Showing System in developed so that users can access various information related to the movies. This system is composed of MPEG player and multimedia database system, For the purpose of efficient data transmission, a variant data transfer method is incorporated. The part of MPEG player is made to display MPEG stream and the part of multimedia database system is developed to manage MPEG files. Moreover, we implemented a variable data transfer method for guaranteeing optimized throughput in different networking status of users. The presented system is implemented in the MS Windows and Linux based platform respectively to facilitate the user access to this system.

Long-term Clinical Outcomes and Risk of Hepatocellular Carcinoma in Chronic Hepatitis B Patients with HBsAg Seroclearance

Gi-Ae Kim,Han Chu Lee,Danbi Lee,Ju Hyun Shim,Young-Suk Lim,Kang Mo Kim,Young-Hwa Chung,Yung Sang Lee,Jung Yeon Hyun,Young-Joo Yang 한국간담췌외과학회 2014 한국간담췌외과학회 학술대회지 Vol.2014 No.4

In Vitro Development of Porcine Embryos after ICSI The DNA Binding Sperm by Fugene 6IDNA Complex

Joo-Hee Han,Sung-Woo Kim,Poong-Yeon Lee,Chun-Gyu Park,Hyun-Gi Lee,Boh-Suk Yang,Hoon-Taek Lee,Won-Kyong Chang,Jin-Ki Park 한국동물생명공학회(구 한국동물번식학회) 2006 Reproductive & developmental biology Vol.30 No.2

In Vitro Development of Porcine Embryos after ICSI The DNA Binding Sperm by Fugene 6IDNA Complex

Joo-Hee Han,Sung-Woo Kim,Poong-Yeon Lee,Chun-Gyu Park,Hyun-Gi Lee,Boh-Suk Yang,Hoon-Taek Lee,Won-Kyong Chang,Jin-Ki Park 한국동물번식학회 2006 Reproductive & Developmental Biology(Supplement) Vol.30 No.2s