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국승학,김현수 충남대학교 산업기술연구소 2005 산업기술연구논문집 Vol.20 No.1
컴포넌트 기술은 소프트웨어를 신속하고, 효과적으로 개발할 수 있는 대안으로 90년대 초반부터 각광을 받기 시작하였다. 이러한 컴포넌트 기술을 활용하는 컴포넌트 기반 개발 방법론이 현재까지 소프트웨어 산업에서의 새로운 대안으로 인식되고 있다. 현재 산업계에서는 컴포넌트 기반 개발 프레임워크 중의 하나인 J2EE를 적용한 개발이 많아지고 있다. 이는 J2EE가 단순히 컴포넌트 기반의 어플리케이션을 구현할 수 있는 수단이 될 뿐만 아니라 어플리케이션 개발 시 제공해야 하는 많은 서비스들을 J2EE 플랫폼을 통해 제공하기 때문이다. 그러나 J2EE 컴포넌트를 테스트하는 것은 기존의 자바 클래스의 테스트보다 더 많은 노력이 필요하고, 어려운 작업이기 때문에 많은 경우에 충분한 테스트를 수행하지 않는다. 많은 개발자들이 J2EE/EJB 컴포넌트를 개발할 때 고려해야 할 사항과 채택해야 하는 테스트 전략에 관해서 알지 못하기 때문이다. 이에 본 논문에서는 기존의 J2EE/EJB 컴포넌트 개발 시 고려해야 할 사항과 테스트 전략에 대해 살펴본다. Component technologies which enable quickly and effectively to develop softwares have begun to come into the spotlight since early 1990s. Nowadays a component-based development methodology using the component technologies is recognized as a new alternative to improve productivity in the software industries. Currently, a number of software development works are performed on a J2EE environment, one of component-based development frameworks. This phenomena arises from J2EE's versatility. A J2EE framework provides plentiful services required to develop component-based softwares. Thus the developers only concentrate on the implementations of business logics. But component testing is a very difficult task since it requires more efforts than the previous Java class testing. So many developers do not perform enough testing works. In fact, many developers do not know about considerations needed to implement EJB components and testing strategies used to verify the components. This paper introduces systematically testing strategies for EJB component test.
흉·요추 불안정성 척추 손상 환자에서 전방감압술과 KANEDA Ⅱ와 SURGICAL TITANIUM MESH를 이용한 내고정술에 대한 임상적 고찰
이학준,김용현,이승명 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.6
The following is a retrospective study on the results of anterior spinal surgery with Kaneda Ⅱ instrumentation and Surgical Titanium MESH after thoracolumbar unstable spinal injuries. From July 1994 to June 1995, we operated on 14 patients at the Chosun University Kwang Yang hospital. Fourteen patients were followed for at least three months. Anterior spinal surgery was performed on the patients who had thoracolumbar unstable spine injuries. The procedure consisted of anterior decompression through corpectomy and stabilization with Kaneda Ⅱ instrumentation and Surgical Titanium MESH which was impacked with resected bone chip. Most of patients had demonstrated showed neurological improvement, relief of pain, immediate stabilization and early return to normal activities. Radiologic evaluation showed the correction of the fracture deformity with satisfactory outcome postoperatively.
안정된 초고속 홈네크워크를 위한 整合 케이블을 이용한 Wiring System
정영철,엄상현,지민석,이승학,강성관,박종안 조선대학교 전자정보통신연구소 2003 電子情報通信硏究所論文誌 Vol.6 No.1
Recently the integrated applicable interfacing technologies using IEEE1394 and UTP cables are considered to be applied to the apartments architecture This paper proposes a wiring system for a high-speed and long-distance data transmission in the future home network system using balanced cables As interfacing a medium UTP-Cat 5 is known as a cable used for LAN connection between PCs Although there are broadband transmission media such as coaxial cables and optical fibers, blanced cables are used because they are cheaper and easer to install The proposes a wiring system enables simultaneous transmission of the IEEE1394 signals of A/V-Data for Digital Consumer Electronics and the Ethernet signals of PCs LAN data using only on UTP-Cat.5 cable, which consists of four unshieled twisted pairs. In order to test the feasibility of this wiring system, we have evaluated the signal transmission and EMC characteristics Furthermore, for the purpose of experimentation, the wiring system is actually installed and evaluated by eye-diagram and BER. The obtained results show that the proposed wiring system can transmit IEEE1394 signals and Ethernet signals simultaneously using 10∼100m UTP-Cat.5 cables at 100Mbps.
Characteristics of Leaf and Fruit in Gyeongnam Astringent Persimmon (Diospyros kaki L.) Cultivars
Seung-Mi Kang,Hak-Gon Kim,Seong-Hyeon Yong,Dong-Jin Park,Do-Hyun Kim,Kwan-Been Park,Myung-Suk Choi 경상대학교 농업생명과학연구원 2021 농업생명과학연구 Vol.55 No.2
This study was carried out determination of characteristics of leaf and fruit of 13 astringent persimmon (Diospyros kaki) cultivars cultivated in Gyeongsangnam-do, Korea. In leaf size, Deabonggam was smaller than that of other astringent persimmon cultivars, however, Dansungsi and Bansi were largest compared to other persimmon cultivars. Fruit width size of Sancheong Deabonggam and Bansi were the biggest. And fruit width size was the biggest in Sancheong Deabonggam. When same cultivars as Dansungsi and Godongsi were cultivated at other regions, it was not somewhat different in fruit weight. The size of fruits of the cultivar varied depending on the maturation of the fruits. In immature fruit, Curigam and Susi cultivars were the biggest and these cultivars were also were the biggest in mature-green fruit. In full ripe fruit, Hamyang Daebonggam and Hadong Daebonggam and Daeheakmu were bigger than that of other cultivars. When the astringent persimmon varieties collected in July were divided into three clusters, group A had a higher leaf area and the lightest fruit weight than the other clusters. In cluster C, the leaf area was small, but the fruit weight was classified as heavier than the other clusters. This study is expected to be widely used for breeding, conservation and processing of sweet persimmons.
Stents versus coronary-artery bypass grafting for left main coronary artery disease.
Seung, Ki Bae,Park, Duk-Woo,Kim, Young-Hak,Lee, Seung-Whan,Lee, Cheol Whan,Hong, Myeong-Ki,Park, Seong-Wook,Yun, Sung-Cheol,Gwon, Hyeon-Cheol,Jeong, Myung-Ho,Jang, Yangsoo,Kim, Hyo-Soo,Kim, Pum Joon,S Massachusetts Medical Society 2008 The New England journal of medicine Vol.358 No.17
<P>BACKGROUND: Several studies have compared the treatment effects of coronary stenting and coronary-artery bypass grafting (CABG). However, there are limited data regarding the long-term outcomes of these two interventions for patients with unprotected left main coronary artery disease. METHODS: We evaluated 1102 patients with unprotected left main coronary artery disease who underwent stent implantation and 1138 patients who underwent CABG in Korea between January 2000 and June 2006. We compared adverse outcomes (death; a composite outcome of death, Q-wave myocardial infarction, or stroke; and target-vessel revascularization) with the use of propensity-score matching in the overall cohort and in separate subgroups according to type of stent. RESULTS: In the overall matched cohort, there was no significant difference between the stenting and CABG groups in the risk of death (hazard ratio for the stenting group, 1.18; 95% confidence interval [CI], 0.77 to 1.80) or the risk of the composite outcome (hazard ratio for the stenting group, 1.10; 95% CI, 0.75 to 1.62). The rates of target-vessel revascularization were significantly higher in the group that received stents than in the group that underwent CABG (hazard ratio, 4.76; 95% CI, 2.80 to 8.11). Comparisons of the group that received bare-metal stents with the group that underwent CABG and of the group that received drug-eluting stents with the group that underwent CABG produced similar results, although there was a trend toward higher rates of death and the composite end point in the group that received drug-eluting stents. CONCLUSIONS: In a cohort of patients with unprotected left main coronary artery disease, we found no significant difference in rates of death or of the composite end point of death, Q-wave myocardial infarction, or stroke between patients receiving stents and those undergoing CABG. However, stenting, even with drug-eluting stents, was associated with higher rates of target-vessel revascularization than was CABG.</P>
Seung-Weon Lim,Ryu-Jin Moon,Min-Seok Kim,Min-Hee Oh,Kyung-Min Lee,Hyeon-Shik Hwang,Tae-Woo Kim,Seung-Hak Baek,Jin-Hyoung Cho 대한치과교정학회 2020 대한치과교정학회지 Vol.50 No.4
Objective: To evaluate the construction reproducibility of a composite tooth model (CTM) composed of an intraoral-scanned crown and a cone-beam computed tomography (CBCT)-scanned root. Methods: The study assessed 240 teeth (30 central incisors, 30 canines, 30 second premolars, and 30 first molars in the maxillary and mandibular arches) from 15 young adult patients whose pre-treatment intraoral scan and CBCT were available. Examiner-Reference (3 years’ experience in CTM construction) and Examiners-A and Examiner-B (no experience) constructed the individual CTMs independently by performing the following steps: image acquisition and processing into a three-dimensional model, integration of intraoral-scanned crowns and CBCT-scanned teeth, and replacement of the CBCT-scanned crown with the intraoral-scanned crown. The tooth axis angle in terms of mesiodistal angulation and buccolingual inclination of the CTMs constructed by the three examiners were measured. To assess the construction reproducibility of CTMs, intraclass correlation coefficient (ICC) assessments were performed. Results: The ICC values of mesiodistal angulation and buccolingual inclination among the 3 examiners showed excellent agreement (0.950–0.992 and 0.965–0.993; 0.976–0.994 and 0.973–0.995 in the maxillary and mandibular arches, respectively). Conclusions: The CTM showed excellent construction reproducibility in mesiodistal angulation and buccolingual inclination regardless of the construction skill and experience levels of the examiners.