分散 데이터 베이스 시스템에서 Deadlock 解決 方法에 관한 硏究

禹容泰,李相祚 경북대학교 공과대학 1986 工大硏究誌 Vol.15 No.-

This paper presents a protocol for deadlock detection and resolution in distributed database systems. This protocol maintains transaction status table and data item status table with flag field. The priority of transaction is based on the number of data items that transaction held. It minimizes the number of communications to be transfered to control site for global deadlock detection and the system overhead by resolution. And it is easily extended to the system that allows to x-lock as well as s-lock.

복합 특징의 분리 처리를 위한 모듈화된 Coupled-ART 신경회로망

우용태,이남일,안광선 한국통신학회 1994 韓國通信學會論文誌 Vol.19 No.10

Properly defining signal and noise in a self-organizing system like ART(Adaptive Resonance Theory) neural network model raises a number of subtle issues. Pattern context must enter the definition so that input features, treated as irrelevant noise when they are embedded in a given input pattern, may be treated as informative signals when they are embedded in a different input pattern. The ATR automatically self-scales their computational units to embody context and learning dependent definitions of a signal and noise and there is no problem in categorizing input pattern that have features similar in nature. However, when we have imput patterns that have features that are different in size and nature, the use of only one vigilance parameter is not enough to differentiate a signal from noise for a good categorization. For example, if the value fo vigilance parameter is large, then noise may be processed as an informative signal and unnecessary categories are generated: and if the value of vigilance parameter is small, an informative signal may be ignored and treated as noise. Hence it is no easy to achieve a good pattern categorization. To overcome such problems, a Coupled-ART neural network capable of modularized categorization of patterns is proposed. The Coupled-ART has two layer of tightly coupled modules. the upper and the lower. The lower layer processes the global features of a pattern and the structural features, separately in parallel. The upper layer combines the categorized outputs from the lower layer and categorizes the combined output, Hence, due to the modularized categorization of patterns, the Coupled-ART classifies patterns more efficiently than the ART1 model. ART(Adaptive Resonance Theory) 신경회로망과 같은 자기조직망에서 신호와 잡음을 적절히 정의한다는 것은 어려운 문제이다. 즉, 한 입력 패턴의 일부분이 어떤 패턴에서는 입력 패턴의 신호로 다루어지나 다른 패턴에서는 잡음으로 취급되어야 할 대도 있다. ART 신경회로망 모델은 신호와 잡음의 정의를 문맥과 학습에 따라 적절하게 규정하기 위하여 계산 단위를 자동적으로 자기척도(Self-Scaling 할 수 있는 기능을 가지고 있다. ART 모델에서의 이러한 자기 척도 기능은 입력 패턴들이 유사한 성질을 가진 경우에는 유효하게 잘 동작한다. 그러나 ART 모델은 기본적으로 하나의 경계 인수에 의해 패턴을 분류하기 때문에 여러가지 성질이 복합된 입력 패턴을 효율적으로 분류하기가 어렵다. 예를 들어 패턴들을 자세하게 분류하기 위하여 경계 인수의 값을 크게 하면 잡음으로 취급되어야 할 부분이 신호로 취급되어 불필요한 인식 부류가 발생한다. 또한 경계 인수를 작게 하면 패턴을 구별하기 위한 중요한 정보가 잡음으로 취급되는 경우가 발생하여 비효율적인 분류를 한다. 본 논문에서는 ART 모델의 이러한 문제점을 해결하기 위하여 복합 특징을 분리 처리할 수 잇는 모듈화된 Coupled-ART 신경회로망 모델을 제안하였다. Coupled-ART 신경회로망 모델은 신경회로망의 구조를 기능별로 모듈화하고 이러한 모듈들을 서로 밀착된 구조로 결합하여 확장된 기능을 수행하는 형태로 구성하였다. 이러한 모듈화된 신경회로망을 통해 패턴 인식 과정에서 다양한 크기나 성질을 가진 특징들에 대한 분류를 비슷한 크기나 성질을 가진 특징들끼리 분리하여 분류를 하였다. 그리고 본 논문에서 제안한 상위층에서 각 모듈의 처리 결과를 종합하여 최종적인 분류를 함으로써 기존의 ART 모델보다 더 효율적으로 패턴을 분류할 수 있다.28.8%$)에서 높고 60 및 40%수분구(水分區)($23.6{\sim}24.1%$)에서 낮은 편이었다. 그러나 옥수수의 조섬유함량(粗纖維含量)에 따라 큰 차이(差異)가 없었다. 건엽(乾葉)의 조단백질함량(粗蛋白質含量)에 따라 큰 차이(差異)가 없었다. 건엽(乾葉)의 조단백질함량(粗蛋白質含量)은 60%수분구(水分區)($14.2{\sim}21.6%$) 및 40%수분구(水分區)($13.8{\sim}16.0%$)가 다른 고토양수분구(高土壤水分區)($7.3{\sim}13.9%$)보다 높은 편이었다. 5. 건경중(乾莖中)의 조섬유함량(粗纖維含量)은 $24.6{\sim}36.7%$로서 건엽중(乾葉中)의 함량(含量)보다 월등히 높았고 조단백질함량(粗蛋白質含量)은 $2.0{\sim}5.3%$로서 건엽중(乾葉中)의 함량(含量)보다 현저히 낮았다. 특(特)히 P.931의 건경중(乾莖中)의 조섬유함량(粗纖維含量)은 다른 작물(作物)에 비해 현저(顯著)히 높은 편이었다.적차이(量的差異)를 나타냈다.間)에는 부(負)(-)의 상관(相關)이 있다.($P{\leq}0.01%$). 5. NEL 및 starch value 환경온도(環境溫度)가 상승(上昇)됨에 따라 감소(減少)된다. 4 엽기(葉期) sorghum식물(植物)의 환경온도(環境溫度)를 달리 하였을 때 NEL가치(價値)는 각각(各各) 4.87MJ($30/25^{\circ}C$), 5.46MJ($25/20^{\circ}C$) 및 5.81MJ/kg($18/8^{\circ}C$)로 변(變)하여 고온(高溫)에서 net energy lactation 축적(蓄積)이 크게 감소(減少)되었다.다.

분산제어 구조를 가지는 TDX-10 전전자 교환기에서 프로세서간 통신 네트워크 관리

우용태,정연쾌 기초과학연구소 1993 기초과학논문집 Vol.4 No.-

分散 데이타베이스 시스템에서의 相互不一致發見 및 再調整 알고리즘

禹容泰 國立 昌原大學校 産業技術硏究所 1987 産技硏論文集 Vol.1 No.-

In many cases it is desirable to keep redundant copies of critical resources such as files in distributed database systems. Although redundancy increases reliability and availability, it leads to mutual consistency problems when network partitions occur. This paper describes a mechanism to detect mutual inconsistency by using the modified version vector mechanisms which detailed update operation and suggests a method to reconcile these conflicts efficiently.

法基水源地의 鳥類分布에 관한 硏究

禹龍泰 慶星大學校 1988 論文集 Vol.9 No.1

1. Line census was monthly in the water catchment area of Bueb Ki, from Jan., 1985 to Dec. 1986. 2. 1128 individuals of 70 species in 1985 and 1254 individuals of 60 species in 1986 were recorded. Among them a total of 71 species could be separated during the two years. Consequently, number of individuals of every month, dominance percentage and dominance index were calculated. 3. The species which showed 100 percentage of dominance were 12 in 1985 and 11 in 1986. Those which showed above 50 percentage of dominance were 20 both in 1985 and in 1986. 4. Those showing above 10 percentage of individual dominance were only two species, Crow Tit and Siskin, in 1985, and Mandarin Duck and Crow Tit in 1986. The others showed only below 10 percentage of dominance. 5. The species which showed dominance index, 10 was only Crow Tit. Those belonging to the upper 10 ranks in the dominance index were all residents. 6. In 1985, of the total 70 species, 25 species of residents, (35.7%), 28 of Summer Visitors, (40%), 13 of winter visitors, *8.6%) and 4 of passage migrants, (5.7%) were recorded, and in 1986, of the total 60 species, 24 of residents and Summer Visitors, (40%) and 12 of winter visitors (20%) were recorded. 7. In 1985, of the total 1128 individuals, 691 of residents, (61.3%), 267 of winter visitors, (23.7%), 160 of summer visitors, (14.2%) and 10 of passage migrants, (0.9%) were recorded. In 1986, of the total 1254 individuals, 635 of residents, (50.6%), 426 of winter visitors, (36.8%) and 157 of summer visitors, (12.5%) were recorded. 8. Through the year, the largest number of species was recorded in spring. In 1985, of the total 70 species, 48 species were recorded during spring period.(Mar∼May) In 1986, of the total 60 species, 49 were recorded during the same period. 9. Apart from these surveys, another survey was also made in the same area from 1960. A total of 85 species could be recorded during the period.

논리 프로그램에서의 Negation처리의 개선

우용태 昌原大學校 1988 昌原大學校 論文集 Vol.10 No.2

낙동강 하구일대에서 기록된 조류

우용태,이종남,허위행 경희대학교 한국조류연구소 1997 연구보고 Vol.6 No.1

본 연구는 조사자가 낙동강 하구 일대에서 기록한 조류들을 정리한 것으로 총 15目 43科 209種이며, 이 중 수조류(水鳥類 Waterbirds)가 133種(63.6%)이며 명금류(鳴禽類 Oscines) 42種(20.1%), 맹금류(猛禽類 Raptores) 18種(8.6%)이다. 移動類型別로 보면 보면 텃새가 26種(12.4%)이고, 철새(候鳥 Migratory birds)는 171種(81.8%)인데 철새 중에서는 겨울새가 89種(42.6%), 나그네새가 53種(25.4%), 여름새가 29種(13.9%)이며 길잃은새(迷鳥 Vagrant)는 12種(5.7%)이다. 천연기념물로 지정된 종은 황새, 흑고니, 큰고니, 고니, 두루미, 재두루미, 노랑부리저어새, 저어새, 느시, 흑두루미, 흰꼬리수리, 참수리, 검독수리, 독수리, 새매, 잿빛개구리매, 알락개구리매, 개구리매, 매, 황조롱이, 칡부엉이, 쇠부엉이, 흑기러기, 개리, 검은머리물떼새, 원앙이로 26종이었다. IUCN의 적색자료서의 기준 및 범주에 속하는 종(원, 1994)은 황새, 가창오리, 개리, 붉은가슴흰죽기, 참수리, 두루미, 흑두루미, 재두루미, 알락뜸부기, 쇠청다리도요사촌, 검은머리갈매기로 11종이었고 준위협종(Non-threatened)은 큰덤불해오라기, 원앙이, 알락꼬리마도요, 고대갈매기, 쇠검은머리쑥새의 5종이었다. 절종된 종은 원앙사촌이었으며 저자에 의해 낙동강에서 처음으로 기록하고 한국조류목록에 등재한 종은 고대갈매기, 수리갈매기, 붉은발제비갈매기, 붉은배지느러미발도요 4종이다. This study shows the birds recorded in the Nakdong river estuary by the authors. The birds recorded in the Nakdong river estuary were 15 orders, 43 families, 209 species. Waterbirds were 133 species (63.6%), Oscines were 42 species (20.1%) and Raptors were 18 species (8.6%). Among them, resident were 26 species (12.4%) and migratory birds were 171 species (81.8%). Migratory birds include 89 species of winter visitor (42.6%), 53 species of passage migrant (25.4%) and 29 species of summer visitor (13.9%) and 12 Species of Vagrant (5.7%). The species designated as a natural monuments are 26 species: Ciconia ciconia boyciana, Cygnus olor, Cygnus cygnus, Cygnus columbianus jankowskii, Grus japonensis, Grus vipio, Platalea leucorodia leucorodia, Platalea minor, Otis tarda dybowskii, Grus monacha, Haliaeetus albicilla, Haliaeetus pelagicus pelagicus, Aquila chrysaetos japonica, Aegypius monachus, Accipiter nisus nisosimilis, Circus cyaneus cyaneus, Circus melanoleucos, Circus aeruginosus spilonotus, Falco peregrinus japonensis, Falco tinnunculus interstinctus, Asio otus otus, Asio flammeus flammeus, Branta bernicla orientalis, Anser cygnoides, Haematopus ostralegus osculans, Aix galericulata. The species listed in Red Data Book of IUCN were 15 species: Ciconia ciconia boyciana, Anas formosa, Anser cygnoides, Aythya baeri, Haliaeetus pelagicus pelagicus, Grus japonensis, Grus monacha, Grus vipio, Porzana exquisita, Tringa guttifer, Larus saundersi. Non-threatened species were 5 species: Ixobrychus eurythmus, Aix galericulata, Numenius madagascariensis, Larus relictus, Emberiza yessoensis. Extint species was Tadorna cristata. First recorded species in the Nakdong river estuary by authors were 4 species of Larus relictus, Larus glaucescens, Sterna hirundo miussensis, Phalaropus fulicarius.

洛東江 河口의 鳥類相에 관한 硏究

禹龍泰 慶星大學校 1991 論文集 Vol.12 No.2

The avian fauna around the Nakdong River Estuary were surveyed monthly from January to December 1990 by the strip intersect method. The result were analysed to charify appearance number of species and individuals in each month, percentage of appearance, percentage of individnals, dominance index. 1) In the survey, the total individuals(50,058) which consisted of 107 species were recorded. 2) Of the total 107 species, 48 species of winter visitors(44.9%), 25 species of passage migrants(23.4%), 16 species of residents (14.9%), 14 species of summer visitors(13.1%), 4 species of vagrants (3.7%) were recorded. 3) In each month, a large number of species in April(61 species), January(58 species), October(56 species) and a small number of species in Jun(26 species), July(30 species )were recorded. 4) In each month, a large number of individuals in November(19,795 individuals), September(6,537 individuals), October(4,579 individuals)and a small number of individuals in June(570 individuals), July(863 individuals), July(863 individuals) were recorded. 5) In the surveyed, the species which showed 100 percentage of appearance were Gray Heron, Spot-billed Duck, Rufous Turtle Dove Dunlin, Blach-tailed Full, Tree sparrow. Those which showed above 50 percentage of appearance were 47 species. 6) In the surveyed, Those showing above 10 percentage of individuals were pochard(13.4%), Blach-tailed (2.5%), Mallard(12.4%), Dunlin(10.0%) Above 500 individuals(1 percentage of individuals) were 17 species. 7) The species which showed dominance index above 10 percentage were pochard, Black-failed gull, Mallard, Dunlin. Above 0.5 percentage were 19 species. 8) In these region, the number of species were 94(B region), 75(A region), 57 species (C region) and the number of individuals, were 25,821(A region), 22,800(B region), 1,437 individuals (C region).

체인가시성에 관한 최적 알고리즘

우용태,엄종훈 기초과학연구소 1993 기초과학논문집 Vol.4 No.-

분산제어 구조를 가지는 TDX-10 전전자 교환기에서 프로세서간 통신 네트워크 관리

정연쾌,우용태 國立 昌原大學校 基礎科學硏究所 1993 基礎科學硏究所論文集 Vol.4 No.-

This paper presents the structure of Inter-Processor Communication(IPC) network implemented for TDX-10 which is the large-capacity digital swiching system with distributed control being developed by ETRI. It also describes management function of the IPC network to provide reliable internal network path.