활성 지식 원천들의 신속한 탐지를 위한 메커니즘

장혜진(Chang, Hai-Jin) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.2

블랙보드 구조는 복잡하고 풀이 방법이 잘 규정되어 있지 않은 문제들을 다루기 위한 구조이다. 블랙보드 구조를 사용하는 시스템의 효율을 높이기 위하여, 본 논문은 블랙보드의 상태가 변화할 때마다 문제 풀이에 잠재적 으로 기여할 수 있는 활성 지식 원천들(knowledge source activations)의 집합을 신속하게 탐지하기 위한 메커니즘을 제안한다. 제안된 메커니즘은 블랙보드 데이터와 지식 원천들의 활성화 조건들(activation conditions) 간의 패턴 매칭 을 신속하게 수행하기 위하여 지식 원천들이 등록하는 활성화 조건들로부터 Rete 네트워크를 생성하여 사용한다. Blackboard architecture was designed as a means for dealing with ill-defined and complex problems. In order to improve the efficiency of the systems using blackboard architecture, this paper proposes a mechanism for fast detection of knowledge source activations which can contribute potentially to the problem solving of blackboard systems, whenever the state of blackboard is changed. The proposed mechanism uses a Rete network generated from the activation conditions subscribed by all knowledge sources to process the pattern matching between blackboard data and the activation conditions efficiently.

Giant hidroacanthoma simplex combined with variable eccrine tumors mimicking clonal seborrheic keratosis

( Jae Hong Oh ),( Byeong Chang Ko ),( Hee Jae Park ),( Seung Pil Ham ),( Mira Choi ),( Sik Haw ),( Hai-jin Park ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1

Hidrocanthoma simplex(HAS) is a rare benign intraepidermal neoplasm arising from eccrine duct. Clinically, it appears as brownish or verrucous plaque on the lower extremities. Histologically, HAS can exhibit intraepidermal cell nests which are called “Borst-Jadassohn phenomenon”. It could be observed in the HAS, clonal seborrheic keratosis (SK), Bowen’s disease and actinic keratosis. An 86-year-old female presented with several decades history of huge brown, verrucous plaque on the right buttock. At initial biopsy, intraepidermal clonal expansion of polygonal basaloid cells were observed within acanthotic epidermis. She was diagnosed as clonal SK, and was removed by CO2 laser ablation. After 3 months, she returned with polypoid grouped papules on the previously treated area. Histologic examination showed intraepidermal proliferation of small to medium-sized polygonal basaloid cells as well as large cells with abundant clear cytoplasm. Atypical cells with large, hyperchromatic nuclei were observed. There was a component of eccrine syringofibroadenoma which is characterized by thin, anastomosing cords of epithelial networks with duct formation extending from the base of the tumor. Tumor cells were stained with EMA and PAS. Final diagnosis was HAS combined with eccrine poroma, eccrine syringofibroadenoma and focal malignant changes. Herein we report a case showing natural history of eccrine tumor from HAS to malignant changes over time.

만성 췌장염의 임상적 연구

정문기,김창덕,현진해 大韓消化器病學會 1997 大韓消化器病學會誌 Vol.30 No.2

식도정맥류 경화요법과 위점막 변화

김재선,김창덕,현진해 대한소화기학회 1992 대한소화기학회지 Vol.24 No.5

Endoscopic features of gastric mucosa in patients with various kinds of liver diseae have caught the attention of investigators in recent past. Gastric mucosal changes are frequently observed in cirrhotic patients and have been related with portal hypertension. Although controversial results have recently been reported, much evidence exists suggesting that the underlying alteration is a mucosal vasculopathy characterized by vascular ectasis, whereas mucosal inflammation have been reported to be infrequent. In evaluating gastric mucosal changes and assuming gastric mucosal blood flow as its cause, the author observed the fiderscopic mucosal findings in 71-liver cirrhosis patients with portal hypertension. The aim of study was to investigate the relationship between variceal form and incidence of gastric mucosal changes, mucosal findings before and after sclerotherapy, gastric mucosal changes according to degree of mucosal destructions of esophageal varices, duration of disappearance of gastric mucosal changes, There was no singificant relationship between the presence of gastropathy and the degree of esophageal varices. Before sclerotherapy, incidence of gastropathy was mosaic pattern 46.4%, hyperemia 15.5%. Sclerotherapy of esophageal varices was significantly increased the incidence and severity of gastropathy. The more destructions of esophageal varices by sclerotherapy were severe, the more time that mucosal changes of post0sclerot herpy returned to those of pre-sclerotherpay were significantly delayed. In conclusion, these observation suggests that the endoscopic changes of the gastric mucosa in patienst with portal hypertension were influenced by the gastric mucosal blood flow.

Helicobacter pylori의 위상피세포 유착에 관한 전자현미경적 고찰

현진해 ( Jin Hai Hyun ),엄창섭 ( Chang - Sub Uhm ),김창덕 ( Chang Duck Kim ),류호상 ( Ho Sang Ryu ),이성일 ( Sung Il Lee ),전훈재 ( Hoon Jai Chun ),박동규 ( Dong Kyu Park ),김영선 ( Young Sun Kim ),김윤홍 ( Yoon Hong Kim ),이정환 대한내과학회 2001 대한내과학회지 Vol.60 No.1

Background : The purpose of this study was to investigate the ultrastructural relation of H. pylori and gastric epithelial cells in their adhesion. Methods : Endoscopic biopsy of gastric antrum and body was performed from 15 patients (9 men, 6 women) with chronic gastritis. These specimens were processed and observed by transmission electron microscope (Hitachi H-600). Results : On the basis of morphological appearances, the different types of adhesion of the organism with the epithelial cells were categorized as filamentous connection, adhesion pedestals, membrane fusion. Coccoid and intermediate forms were associated with filamentous connection whereas bacillary forms were associated with adhesion pedestals and membrane fusion. Conclusion : Various types of adhesion were associated with H. pylori and gastric epithelium. Further studies are needed to investigate biophysiologic influence to epithelial cells by ultrastructural relationship.(Korean J Med 60:16-21, 2001)

웹 기반 시점 확인 시스템의 개발

장혜진(Hai Jin Chang) 상명대학교 공학기술연구소 2003 공학기술연구 Vol.2003 No.1

This paper studies about a secure and easy-to-use web-based timestamp system. By using an independent time stamping service provides by a trusted third party, a unique and unforgeable time stamp can be assigned to any piece of data. The time stamp makes it possible to prove that this particular data at a certain point in time. Many industrial standards for timestamp system already exist. But, up to now, time stamp system is not widely used in the industrial world and there are not many timestamp system for practical services. This paper shows a design specification for a web-based, secure, and easy-to-use, and easy-to-maintain timestamp system. The design specification is for wide use of timestamp systems in the industrial world.

Association of Polymorphisms in the Calpain I Gene with Meat Quality Traits in Yanbian Yellow Cattle of China

Xin, Jin,Zhang, Li-Chun,Li, Zhao-Zhi,Liu, Xiao-Hui,Jin, Hai-Guo,Yan, Chang-Guo Asian Australasian Association of Animal Productio 2011 Animal Bioscience Vol.24 No.1

The calpain I (CAPN1) gene is an important marker for meat tenderness and marbling score in the bovine, but there were no studies to determine whether the CAPN1 gene had an association with other meat quality traits. In this study, we examined the relation between genetic polymorphisms of the CAPN1 gene and some meat quality traits in Yanbian Yellow Cattle of China. By PCRSSCP and gene sequencing in 321 unrelated Yanbian yellow cattle, twenty seven single nucleotide polymorphisms (SNPs) were detected in CAPN1, two existed SNPs in exon 8 and exon 17 resulted in the change of AA at F311S and M599V, respectively, and the otherpolymorphisms were at intron 7, 8, 14, 16 and 17. There were different preponderant genotypes at the corresponding gene locus and all genotypes were not associated with tenderness but other meat traits. This is the first study of the relationship between CAPN1 and meat quality besides tenderness in Yanbian yellow cattle of China.

메소드 투사 연산자를 제공하는 객체 지향 질의 모델

장혜진(Hai Jin Chang),유석인(Suk I. Yoo) 한국정보과학회 1993 정보과학회논문지 Vol.20 No.3

객체 지향 데이타 모델은 다른 데이타 모델과 비교시, 데이타의 정적인 속성들뿐만 아니라 동적인 속성들을 메소드(method)의 형태로 데이타베이스 스키마 내에서 직접 정의할 수 있다는 특징을 갖는다. 하지만 기존의 객체 지향 데이타베이스 시스템들이나 질의 모델들에서는 질의 결과에 질의 대상 객체들의 메소드들의 임의의 부분 집합을 수행 가능한 형태로 질의 결과에 투사(projection)하지 못한다. 본 논문은 가상 튜플 타입이라고 본 논문에서 명명한 새로운 튜플 타입을 이용하여, 질의 대상 객체의 애드리뷰트들뿐 아니라 메소드들의 임의의 부분 집합을 수행 가능한 형태로 질의 결과에 투사할 수 있는 메소드 투사 연산을 제공하는 객체 지향 질의 모델을 제안한다. 제안된 질의 모델은, 객체 식별자(objet identifier), 속성 계승, 타입 계층 구조, 캡슐화(encapsulation)와 같은 핵심적인 객체 지향적 개념들을 가지며 튜플이나 집합과 같은 복합값(complex value)에 대한 형성자(constructor)들을 지원하는 데이타 모델을 기반으로 한다. Compared with other data models, object-oriented data model has a unique feature that dynamic properties as well as static properties of data can be defined directly in a database schema in the form of methods. But previous object-oriented database systems or query models don't provide a method projection operator, that is, a query operator which can project an arbitary subset of the methods as well as attributes of its input objects on its output objects in their executable forms. This paper suggests an algebraic query model where an arbirtary subset of the properties of query input objects can be reflected on the query results by introducing a new tuple type(named virtual tuple type In this paper) into the query model. Our query model is based on the data model which has the fundamental object-oriented concepts such as object identifier, type hierarchy, property inheritance and encapsulation. The data model supports constructors of complex values such as tuples and sets.

이공지능 : 에이전트들 간의 밀접한 협력을 지원하기 위한 다중 에이전트 메시지 전송 구조

장혜진 ( Hai Jin Chang ) 한국정보처리학회 2014 정보처리학회논문지. 소프트웨어 및 데이터 공학 Vol.3 No.3

This paper proposes a multi-agent message transport architecture to support application areas which need fast message communications for close collaboration among agents. In the FIPA(Foundation of Intelligent Physical Agents) agent platform, all message transfer services among agents are in charge of a conceptual entity named ACC(Agent Communication Channel). In our multi-agent message transport architecture, the ACC is represented as a set of system agents named MTSA(Message Transfer Service Agent). The MTSA enables close collaboration among agents by supporting asynchronous communication, by using Reactor pattern to handle agent input messages efficiently, and by selecting optimal message transfer protocols according to the relative positional relationships of sender agents and receiver agents. The multi-agent framework SMAF(Small Multi-Agent Framework), which is implemented on the proposed multi-agent message transport architecture, shows better performance on message transfer among agents than JADE(Java Agent Development Environment) which is a well-known FIPA-compliant multi-agent framework. The faster the speed of message transfer of a multi-agent architecture becomes, the wider application areas the architecture can support.

M-Commerce의 활용 방안에 관한 연구

김창해(Chang-Hai Jin),신은경(Eun-Kyoung Shin),권영직(Young-Jik Kwon) 한국산업정보학회 2003 한국산업정보학회 학술대회논문집 Vol.2003 No.11