내시경적 절제로 진단된 폴립 형태의 심재성 낭종성 위염 2예

허종현,조영화,성용완,유재훈,구동영,김갑식,노지훈,문원 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.2

Gastritis cystica profunda (GCP) is a disease characterized by hyperplastic and significant extension of cystic dilatation of the gastric mucous glands, which results in a cystic lesion in gastric submucosa. It often occurs on the part of gastroenterostomy, but can be found in the stomach without any previous surgery. GCP has variable gross finding including solitary polyps, diffuse ones, submucosal tumors, and rare giant gastric mucosal fold. It is difficult to tell GCP from a cancerous lesion by gross finding that the disease demands a necessary tissue biopsy, though GCP is commonly showed as a benign in the progress. We report a case of GCP in polypoid types diagnosed by endoscopic polypectomy.

신뢰성을 제공하는 효율적인 분산 파일 시스템

元裕憲,金鐘勳,安柔貞 弘益大學校 科學技術硏究所 1996 科學技術硏究論文集 Vol.7 No.2

Current network file system protocols rely heavily on a central server to coordinate file activity among client workstations. This central server can become a bottleneck that limits scalability for environments with large numbers of clients. In central server systems such as NFS and AFS, all client writes, cache misses, and coherence messages are handled by the server. To keep up with this workload, expensive server machines are needed, configured with high-performance CPUs, memory systems, and I/O channels. Since the server stores all data, it must be physically capable of connecting to many disks. This reliance on a central server also makes current systems inappropriate for wide area network use where the network bandwidth to the server may be limited. In this paper, we investigate the software RAID file system, writing data redundantly across an array of disks in each of the workstations on the network. By striping across enough disks, each workstation can appear to have disk bandwidth limited only by the network link bandwidth. Availability of a software RAID file system could be better than in other distributed file systems, because there is no central host to be a single point of failure. If one workstation crashes, any other can take its place in controlling the RAID. We present results from a trace-driven simulation study of the network file system protocol. We find that the software RAID file system improves the performance in the aspect of the av, age response time when compared with NFS protocol.

알레르기성 진균성 부비동염 1예

동헌종,윤성원,정승규 대한이비인후과학회 1999 대한이비인후과학회지 두경부외과학 Vol.42 No.7

멀티미디어 서버에서 효율적인 승인 제어 알고리즘 설계

元裕憲,朴勇,金鍾勳 弘益大學校 科學技術硏究所 1997 科學技術硏究論文集 Vol.8 No.-

A server of client-server environments has to not only minimum delay time, but also realtime processing of job. Specially, multimedia systems are need to an efficient admission control algorithm, because of clients of big-size data need to maximum processing and realtime processing. In this paper, we propose an admission control algorithm that considers both realtime requests and non-realtime requests. The proposed algorithm minimizes delay time about requests of client and efficiently uses resources of system. Using comparisons between a previously proposed algorithm and the proposed algorithm we show that the proposed algorithm improves performance in the aspect of the delay time and consumed buffer size.

동진강 유역 비점오염원 정밀조사

원찬희,정팔진,김민정,조선영,김세훈,김종천 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2002 工學硏究 Vol.33 No.-

Nonpoint source pollution(NSP) arises due to agriculture activity and it is quite an extensive and complicated problem in order to control and has received a great deal of concern during the recent years, whereas point source are known to originate from an estimated volume of contaminant discharged from a distinguishable source. Extensive research work have been conducted and presented in the past with regard to the various characteristics of watershed on Dong Jin River(DJR), however there are certain drawbacks of existing survey for determining important polluting sources, distribution features of pollutants and estimated load of the organic and nutrients from the creeks. Unfortunately, investigation for loadings originating due to agricultural drainage was not satisfactory, although the regional consideration for DJR across Kim Je Field(KJF) as an agricultural area receives a reasonable source point in the agri-pollution management. Therefore it was necessary to carry out a thorough investigation into the diffuse sources resulting, to form the pollution-developing estimation and to evaluate the output roperties and determining various factors in the generation of non-point pollution. Eventually, this research work would serve as an useful tool for the development of predictive pollution management for DJR. Non-point sources in the present work were classified as municipal non-treated sewage water discharged into the river, loadings through agricultural drainages in the dry/wet field and inadequate treatment of wastewater generated from livestocks. The entire duration of the research work was from December-2001 to July-2002. Site measurement were conducted during various season, in a dry season(December), in rainfall, in seed-sowing time and also collecting data from the rural public organizations related to water management was done and examined and examined during the mid of research work. Similarly, domestic wastewater loadings due to population was based on area unit, as City, Country, Up, Myon, Dong, Ri. The Dong Jin River watershed contains small three Creeks, KoBu(KB), DongJin(DJ, including JeongEup(JE) and ChilBo(CB), WonPyong(WP). It was further divided into 32 sub-watersheds which comprises of further 5,18,9 watersheds in the creeks respectively. The results obtained from research work are presented as follows. Animal productions have marked differences in the rate of pollutant loadings reported in the following sequence: DJ(only CE)>WP>CB>KB, in a case of Korean cow and milk cow. However, it was revealed that WP creek became significantly higher than any other livestocks. According to statistical data for land use, rice field(369.0㎢) and forest(378㎢) have much occupation prior to dry paddies(125.0㎢), residential land(32.0㎢) and others(5.0㎢). Especially, rice fields receives 2.5∼3 times than dry paddies in size.

수액 세트의 Drip Chamber를 이용한 상부소화관의 이물 제거 1예

서종훈,양미진,이진성,이상호,김정원 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.2

In the upper gastrointestinal tract, in particular, there are parts consisting of esophageal sphincter muscles to carry out physiologic functions, which causes impairments when removed, as well as such complications as mucosal injuries, bleeding and even perforations in the case of foreign bodies with large size and/or sharp angles. Therefore, it is essential to use an appropriate type of supplementary instrument for a safe procedure. Frequently utilized supplementary instruments are overtube, protector hood, latex glove and transparent cap. We report a case in which authors were successful in removing a watch bend consisting of metal ring from gastric body while using a modification of a widely available drip chamber of fluid set attached to vertical end of endoscopic device.

디스크 배열

元裕憲,金鍾勳,盧三赫 弘益大學校 科學技術硏究所 1995 科學技術硏究論文集 Vol.6 No.-

Disk arrays were proposed in the 1980`s as a way to allow parallelism between multiple disks to improve aggregate I/O performance. Today they appear in the product lines of most major computer manufactures. This paper gives a comprehensive overview of disk arrays and provides a framework in which to organize current and future work. First, this paper introduces disk arrays in general, and reviews the driving forces that have popularized disk arrays : performance and reliability. It discusses the two architectural techniques used in disk arrays, striping across multiple disks to improve performance and redundancy to improve reliability. Next, this paper describes 6 disk array architectures, namely RAID levels 0∼5. It goes on to discuss advanced research and implementation topics such as the way in which parity is distributed in a RAID, and the means of refining the basis RAID levels to improve performance. Finally, this paper describes software disk arrays which allow writing data redundantly across an array of disks in workstations distributed across the network.

산불 피해 소나무재의 역학적 특성 및 급속오븐 건조특성

황원중,권구중,박종수,김남훈 한국목재공학회 2003 목재공학 Vol.31 No.4

본 연구에서는 산불 피해 소나무재의 이용을 위한 기초자료를 얻고자 역학적 및 건조 특성을 조사하였다. 산불피해재는 종압축 특성, 전단강도, 충격휨흡수에너지 등에서 건전재와 거의 유사한 결과를 보여주었으며, 산불피해재 변재부의 휨특성은 건전재보다 양호하게 나타났다. 건전재와 산불피해재 변재부의 생재함수율은 산불피해재가 다소 낮았으나, 건조속도는 거의 차이가 없었다. 건조시 발생되는 초기할렬은 건전재가 산불피해재보다 발생율이 높았고, 내부할렬은 건전재와 산불피해재에서 발생되지 않았다. 따라서 산불에 의해 피해를 입은 목재의 대부분은 수피부를 제거하여 이용할 경우 건전재와 거의 동일한 용도로서 사용이 가능할 것으로 생각된다. The Mechanical and drying characteristics of Pinus densiflora wood, which was damaged by forest fire, and sound wood were examined. There were no significant differences in axial compressive properties, shearing strength and impact bending absorbed energy between damaged and sound woods. But the bending properties of damaged wood were slightly higher than those of sound wood. The green moisture content of sapwood in damaged wood was lower than that in sound wood, but oven-drying rate was similar in both woods. Number of initial check in damaged wood was smaller than that in sound wood, and inner check in damaged and sound woods was not observed. Consequently, it is considered that mostly damaged wood by forest fire can be used for wood material after removing the considered that mostly damaged wood by forest fire can be used for wood material after removing the bark.

마이크로 인장시험법을 이용한 단결정 실리콘의 파괴강도에 미치는 공정 및 크기효과 평가

이성훈,김종진,정증현,김동원,권동일 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.7

The process and size effects on the fracture strength of single-crystal Si were evaluated using a microtensile testing method. The microtensile specimens of single-crystal Si films were fabricated by CMP(chemical-mechanical polishing) and micromachining processes, The microtensile test setup was built to accommodate requirements such as specimen handling, jig, alignment and very small loads and displacements. The variations in the fracture strength with thickness and effective volume of the Si film were evaluated. In addition, the results were discussed statistically. The effects of dry-etched surface and CMP surface on the mean fracture strength were compared. Through AFM (atomic force microscopy) observation, it could be found that the larger flaws of the dry-etched surface affected significantly on the decreasing of the mean fracture strength.

Pocine Adenovirus-3의 E1B Region의 鹽基序列 分析

朴鍾賢,宋載永,李重馥,玄芳勳,安東濬,車相昊,裵用泰,姜永源,Reddy, P S,全茂炯,安壽煥 충남대학교 생물공학연구소 1999 생물공학연구지 Vol.7 No.-

돼지 아데노바이러스(PAV-3). 6618주의 EIB region이 包含되어 있는 map unit 4.0에서 9.7까지의 유전자에 대한 1,984 bp의 염기서열을 決定하였으며, 이 結果를 알려진 여러 아데노바이러스 유전자와 비교하여 다음과 같은 결과를 얻었다. 1. PAV-3의 EIB유전자는 10개의 ORF로 구성되어 있으며, 그 중 아데노바이러스의 단백질과 유사성이 있는 것은 ORF1, ORF2 및 ORF3이었다. ORF1은 Ad41의 19kd 와 BAV-2에서의 EIB ORF2에서의 아미노산의 一致率은 각각 32%와 31%이었다. 2. ORF2는 Ad2 55kd protein과 tupaia adenovirus 44kd protein가 각각 34%로 아미노산 一致率이 가장 높았으며, Ad41의 52kd protein. BAV-3의 EIB ORF3에서도 33%의 一致率을 보였다. 3. ORF1은 61-666 uncleotide (606 bp), ORF 2에서는 429-1,850 uncleotide (1,422 bp)의 부위로 각각 202, 474 a.a로 構成되었으며, 예상되는 분자량은 20 kd와 52 kd이었다. 4. ORF3는 hexon-associated pIX유전자로 추정되며 내부에 1개의 polyadenylation signal(ATAAA)이 1938-1942 uncleotide에 위치하였으며, 이 부위는 TATA box (1937-1942 uncleotide)와 중복되어 존재하였다. Porcine adenovirus type 3 (PAV-3) does not cause severe infection in pigs. Adenovirus has been suggestive of live vaccine vector carrying foreign gene. One of insertion regions is delayed early (EIB) region. However, EIB region of PAV-3 has not been molecularly characterized to date. Nucleotide sequence of EIB of PAV-3 was determined. The EIB region was composed of 1,984 bp and located between 4.0 and 9.7 map units. Three potential open reading frames(ORFs) with low level of homology to other adenoviruses and a polyadenylation signal were identified in the rightward direction of genome. The nucleotide and the predicted amino acid sequences of EIB were compared to those of human and animal adenoviruses. One of the three potential ORFs. ORF1 encoded a polypeptide homologous to bovine adenovirus type 2(BAV-2) ORF2 and human adenovirus type 41(Ad41) 19 kd protein. ORF2 encoded a polypeptide homologous to human adenovirus type 2(Ad2) 55 kd protein, bovine adenovirus type 3(BAV-3) ORF3 and porcine adenovirus type 4(PAV-4) ORF2. The predicted protein of ORF1 had homology to those of Ad41 and BAV-2 with 32 and 31% respectively, whereas the deduced protein of ORF2 had homology to those of Ad2. BAV-3 and PAV-4 with 34, 33 and 29%, respectively.