수중기지국 기반 수중통신망 구축 및 성능 시험

김도훈(Kim Do Hoon),채광영(Chae Kwang Young),고만재(Go Man Jae),정해지(Jeong Hae Ji),유호동(Liu Hao Dong),조용호(Cho Young Ho) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.2

본 논문에서는 수중음향통신을 활용하여 CTD센서와 DO센서를 통해 수중환경데이터를 측정하고, 측정된 값을 육상에서 확인할 수 있도록 하는 실험을 진행하였다. 본 실험은 남해 실해역에서 20년 12월 12일부터 20일까지 진행되었으며, 구조물은 해수면에 해상부이 1대, 해저면에 수중기지국 2대, 센서노드 10대를 설치하였다. 모든 구조물에는 송신을 위한 트랜스듀서와 수신을 위한 하이드로폰이 장착된다. 해상부이는 해저면에 설치된 수중기지국과 센서노드에서 수중환경데이터를 수신한 후 육상 서버와 통신하여 패킷을 전송한다. 데이터는 1시간 단위로 전송되도록 설정하였으며 실험결과, 패킷 성공률은 약91.20%인 것을 확인하였다.

두개강내 정맥기형들과 동반된 안와내 해면상 혈관종 1례

조도상,송준혁,김명현,박향권,김성학,신규만,박동빈 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.6

HPLC를 이용한 농약 carbaryl의 측정법에 관한 연구

김도권,이상한,조만희,김창세 순천향의학연구소 1995 Journal of Soonchunhyang Medical Science Vol.1 No.1

The menasurements of pesticide carbaryl were studied, and the following conditions were proposed as a most good method; 1. These were detected at 222 nm by means of ISCO model 2350. 2. Pesticide carbaryl measurement was performed by means of ISCO model 2350, Spherisorb ODS column, 40% acetonitrile as a solvent, flow rate 1.0 ml/min, and chart speed 0.5 cm/min. 3. The relationships between the concentration and the absorbance of pesticide carbaryl were linear from 0.5 to 5 ppM. 4. Deproteinzation would be used satisfactorily in all of Folin-Wu, trichloractic acid and perchloric acid, and the recovery rate was also satisfactorily for all of them.

십이지장과 대장을 동시에 침범한 결핵 1예

이만재,박치영,곽재정,유보열,기장도,박찬국,김만우,김정용 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1

Tuberculosis of duodenum is so rare and is usually secondary to pulmonary or intestinal tuberculosis . It is difficult to diagnose duodenal tuberculosis in clinical and radiologic findings due to its non-specific symptoms and inconsistent lesion. The diagnosis was made on the basis of the histological study of the endoscopic biopsy and resected surgical specimen. so we report a case of tuberculosis of duodenal bulb and of ascending colon with, the brief review of the literatures.

데이터웨어하우스 개발수명주기상에서 데이터 품질의 평가요소 및 품질향상 방안에 관한 연구

이종만,함도훈 경복대학 1999 京福論叢 Vol.3 No.-

본 연구에서는 데이터웨어하우스 구축시 핵심성공요인인 데이터 품질의 확보방안에 대해 살펴보고 있다. 데이터웨어하우스를 간단하게 말한다면 의사결정을 위해 최적화된 데이터베이스라고 정의할 수 있으며 그래서 많은 조직에서 데이터웨어하우스를 도입하려고 노력하고 있다. 또한 데이터 품질은 데이터 사용자가 사용하기에 적합한 데이터라고 정의할 수 있다. 또한 많은 문헌 및 조사에서 데이터웨어하우스 구축시 고품질의 데이터 확보가 핵심성공요인이라고 주장하고 있다. 본 연구에서는 데이터 품질의 요건으로 접근성, 해석가능성, 유용성, 신뢰성의 4가지 영역으로 나눌 수 있으며 각 영역에는 세부항목들이 있다는 것을 지적하고 있다. 실제로 데이터 품질을 향상시키는 유일한 방법은 데이터의 사용을 지속적으로 증가시키는 방법이다. 만일 조직에서 데이터의 품질 향상을 원한다면 각각의 데이터 요소들에 대해 엄격한 규칙을 적용한 사용이 필요하다. 이러한 고품질의 데이터 확보 위해서는 개발자 뿐만아니라 비즈니스 즉,실제 사용자의 관심과 참여가 무엇보다 중요하다. This paper proposes data quality improvement method for the datawarehouse development. A simple definition of a datawarehouse is : a database that is optimized for decision support. Therefore, now many organizations are trying to introduce it. This paper define "data quality" as data that are fit for use by data consumers. In additon, data quality is critical success factor in the quality literature and survey. The results indicate four dimensions of data quality : accessible, interpretable, useful, believable. Each has measurement items. The only way to truly improve data quality is to increase the use of that data. If an organization wants to improve data quality, it needs to ensure that there is stringent use of each data element. Not only Business staff but also Is department members must involve the datawarehouse development and implementation project to improve data quality.

알미늄 板材의 成形性에 관한 硏究

박만용,임영석,김상도,서대교 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.2

The formability of aluminium sheet(Al 1100), i.e., the maximum effective cup height, the uniformity of drawn cup height, the limiting drawing ratio, the thickness distribution of drawn cup and the maximum drawing load are discussed for the square and rectangular cup drawing. Two blank shapes are adopted to compare the above formabilities. One(h-bl) is designed be the slip -line theory and the other(G-bl) is the conventional shape. The five punch shape factors are considered to investigate the wide range of formability. As a result, the theoretical blank shape(h-bl) is recommended to accomplish the higher effective cup height, the larger limiting drawing ratio, the superior uniformity of drawn cup height and more smooth thickness distribution.

전기적 노이즈에 의한 누전차단기의 오동작에 관한 실험적 연구

김태만,권용준,기도형 한국산업안전학회 2002 한국안전학회지 Vol.17 No.1

The purpose of this study was to investigate effect of electrical noise on malfunction of the earth leakage circuit breaker. A three-way experiment for studying its malfunction was conducted, in which electrical products such as radio, alternating current arc welder and cellular phone, distance from the earth leakage breaker to electrical products, and whether or not the earth leakage breaker is contained in the steel box were employed as experimental variables. Eleven earth leakage breakers frequently used in real situations were tested in each experimental treatment. The electrical products were used for generating electrical noise that is known to be able to cause malfunction of the earth leakage breaker. The results showed that except a case for one of the 11 earth leakage breakers when the radio made by M company was located 30 cm ahead of the breaker, malfunction did not occur in any other experimental treatment. Consequently, it is suggested that the breaker should be normally used for preventing electricity-related accidents without fear of its malfunction in industrial sites.

소프트웨어 아웃소싱을 위한 벤더 평가시 고려요소에 관한 연구

함도훈,이종만 경복대학 1998 京福論叢 Vol.2 No.-

현대 기업 또는 정부의 조직에서 소프트웨어를 개발하고 유지보수하는 작업은 경쟁우위를 확보하는 측면에서 매우 중요하다. 그러나 소프트웨어 개발과 유지보수와 관련하여 매우 많은 비용이 소요되며, 기업의 예산 항목중 핵심 비용으로 자리잡고 있다. 비즈니스 프로세스 리엔지니어링에 대한 필요성은 기업전반에 걸쳐 인식되고 있으며 이를 위해 아웃소싱이 검토되고 있다. 본 연구에서는 이러한 소프트웨어의 비용을 감축하고, 리엔지니어링을 추진할 수 있는 소프트웨어 벤더의 평가 방안 및 평가요소에 대해 연구하였다. 특히 벤더 일반사항과 소프트웨어 자체에 대한 평가 항목으로 크게 나누어 살펴보았다. 결론적으로 아웃소싱 벤더 대한 의사결정은 매우 중요하고 신중하게 이루어져야 한다는 것을 강조하고 있다. How is development and maintained is an important competitive aspect in modern organizations operation. Software development and maintenance are, however, expensive operations and have become major costs in corporate budgets. Business process reengineering is becoming more widespread, and more business executives are wondering if software management should it be outsourced. This paper suggest is investigated the vendor evaluating method for software outsourcing. Major aspects are overall vendor aspect and software package itself. The decision to outsource and the choice of an outsource vendor deserve thought analysis and careful preparatory work.

인공 석회화 기질의 개발 및 파골세포에 의한 기질흡수에 관한 연구

김현만,박주철,임도선,박수진,김윤지,고재승 대한구강해부학회 1997 대한구강해부학회지 Vol.21 No.1

To develop artificial matrix resorbable by osteoclasts can be used as a model system that biological function of osteoclasts would be assayed in vitro in a standardized condition instead of using heterogenous bone or dentin slices. The present study developed artificial substrates consisted of apatite crystals. collagen gen. agar, apatite crystals under collagen film, mixture of apatite crystals and collagen, and mixture of agar and apatite crystals. And osteoclastic attachement and resorption activity on the each substrate was assayed in vitro. Osteoclasts attached to apatite crystals, collagen, mixture of apatite crystals and collagen, and mixture of apatite crystals and agar, however, not to agar. This suggested that apatite crystals and collagen should be exposed on the surface of artificial substrate where osteoclasts can attach. Osteoclasts attached to the substrate resorbed the substrate consisted of apatite crystals, mixture of apatite crysals and collagen, and apatite crystals under thin film of collagen, however, not of collagen, mixture of apatite crystals and agar. This suggested that the first phase of osteoclasts in resorbing matrix is to secrete acid and the end result of this phase, whatever it may be, may activate secretion of hydrolytic enzymes specific to organic components.

페나진 유도체들의 抗菌性에 관한 분자궤도론적 연구

郭庚度,朴柄珏,金鎬順,徐萬哲,金鐘大 嶺南大學校附設 基礎科學硏究所 1988 基礎科學硏究 Vol.8 No.-

The electronic states of the antimicrobial phenzine and its derivatives were examined by Extended H?uckel Method. It was found that the sum of nucleophilic reactivity index for trans 1,2, and 4 positions, ?? in a molecule was found to be related antimicrobial activity. The index, ??, should be applied to biological activity as well as antimicrobial activity.