식물의 고염(高䀋) 스트레스에 대한 반응 및 적응기작

윤대진 Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.

Plant responses to salinity stress is critical in determining the growth and development. Therefore, adaptability of plant to salinity stress is directly related with agriculture productivity. Salt adaptation is a result of the integrated functioning of numerous determinants that are regulated coordinately through an appropriate responsive signal transduction cascade. The cascade perceives the saline environment and exerts control over the essential mechanisms that are responsible for ion homeostasis and osmotic adjustment. Although little is known about the component elements of salt stress perception and the signaling cascade(s) in plant. the use of Arabidopsis plant as a molecular genetic tool has been provided important molecular nature of salt tolerance effectors and regulatory pathways. In this review. I summarize recent advances in understanding the molecular mechanism of salt adaptation.

대단위 병렬컴퓨터 시스템 노드구조 설계를 위한 워크벤치(SKYLAB)의 개발

윤현진,육은정,노권형,황대준 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.1

Building the simulation environment of massively parallel computer systems has been recognized as a better approach over the experimentation on real machines to study extensively their architectural behaviours at a minimum cost. In this paper, we introduce a parallel processing workbench SKYLAB being implemented on DE C5000/25 and SPARCI workstations for design of node architectures featuring optimal organization for massively parallel processing. For the through analysis of the features of architectures in mind, the SKYLAB comes with thress major components: the compilerbackend translating single-threaded codes into their equivalent multithreaded codes, the node architecture emulator incopperating target CPU for program execution, and the graphic use interface for easy interpretation and expedating the analysis of the statitistics from the simulation runs. The design experience of the node architecture of the DAVRID multithreaded parallel processing computer using the SKYLAB examplifies how much effictively to make experiment on parallel simulations using this integrated toolset.

Tropane alkaloid의 생합성과 분자육종

윤대진 Plant molecular biology and biotechnology research 2002 Plant molecular biology and biotechnology research Vol.2002 No.-

The tropane alkaloids hyoscyamine (its racemic form being atropine) and scopolamine are used medicinally as anticholinergic agents that act on the parasympathetic never system. Because they differ in their actions on the central nervous system, currently there is a 10-fold higher commercial demand for scopolamine, in the N-butylbromide form, than there is for hyoscyamine and atropine combined. Several solanaceous species have been used as the commercial sources of these alkaloids, but the scopolamine contents in these plants often are much lower than those of hyoscyamine. For this reason there has been long-standing interest in increasing the scopolamine contents of cultivated medical plants. Naturally occurring and artificial interspecific hybirds of Duboisia have high scopolamine contents and are cultivated as a commercial source of scopolamine in Austrailia and other countries. Anther culture combined with conventional interspecific hybirdization also has been used to breed high scopolamine-containing plants in the genera Datura and Hyoscyamus, but without much success. The use of recombinant DNA technology for the manipulation of metabolic processes in cells promises to provide important contributions to basic science, agriculture, and medicine. In this review, I introduce on the enzymes and genes involved in tropane alkaloid biosynthesis and current progress in metabolic engineering approaches for tropane alkaloid, especially scopolamine, production.

공유버스 멀티프로세서시스템을 위한 버스 시뮬레이터의 설계

윤현진,박길철,황대준 成均館大學校 科學技術硏究所 1994 論文集 Vol.45 No.2

In this paper, we develop the simulation environment for evaluating the performance of multiprocessor systems using Futurebus^+ as shared bus with various configurations. The environment is constructed into three stages. The first is devoted to the preprocessing stage in which the parallel work- loads, multiple threads, are generated from single- thread codes traced on the benchmarks. The second stage includes the engine of the bus simulator. The results from the simulation include cache hit ratio, processor utilization and bus congestion ratio according to changes of the number of processors, and cache coherency protocols. Based on the analysis of the simulation results, we noticed that the processor utilization and the bus congestion ratio are heavily depend on cache hit ratio. The write-broadcast protocol is shown as the most effective scheme in comparison with other cache coherence protocols experimented.

다중 네트워크 아키텍처 지원을 위한 객체지향 게임 네트워크 엔진의 설계 및 구현

형대진,이재윤,박경환 동아대학교 정보기술연구소 2007 情報技術硏究所論文誌 Vol.14 No.2

Online game that based on network communication, use various type of communication and network architecture for each character and genre of game. In this paper, we investigated and analyzed communication types used in online games and, based on the results, introduced a method of developing an object-oriented network engine supporting various types of network architecture. The developed network engine not only supports the development of games using various types of communication applicable to online games but also is easily expandable because of its hierarchical structure based on the object-oriented concept. Moreover, since it can support dead reckoning make up for network latency problem, we use very usefully for development of game.

RFID를 활용한 3차원 물류 창고 관리 시스템의 설계 및 구현

형대진,김승구,이재윤,박경환 東亞大學校附設 淸報技術硏究所 2006 情報技術硏究所論文誌 Vol.13 No.2

At present, a business management is managing to minimize a investment or a stock cost for a warehouse. So the essential point of warehouse's function is exchanged to attach greate important to information technology and client services. But the existing warehouse management systems have many weak points in part of information technology and client services. In this paper, we suggest the plan of introducing the RFID system into warehouse management system for an efficient management. We also develop warehouse management system to show in realtime 3D a location information of goods in the warehouse.

다단토양층을 이용한 하수처리에 관한 연구

손대희,정윤철,신정훈,정진영,안대희 한국물환경학회 2004 한국물환경학회지 Vol.20 No.3

The sewages produced from small villages, rural community, drinking water reservation area and park which doesn't have sewage piping system can be caused a serious water pollution at the restricted areas. The objective of this research was to suggest an economical and effective sewage treatment method by investigating the removal of the organics, nitrogen, and phosphorus in the multi-soil-layering reactor. Soil, natural zeolite, and iron slag were used as a supporting media of multi-soil-layering in this research. The purpose of natural zeolite addition was to maintain the consistent ammonium exchange capacity by providing a sequential environment, and that of iron slag addition was to remove phosphorus by adsorption. Continuous experiment of lab-scale single-soil-layering (S-1), multi-soil-layering (S-2), and mixed-soil-layering (S-3) methods were studied to compare and optimize three different types of the reactors. The organic removal efficiencies showed more than 90% in all three reactors. While S-1 and S-3 reactors showed about T-N removal of 31%, 45%, respectively, the average T-N removal efficiency of the S-2 reactor represented an 87%. In conclusion, that results suggest that the multi-soil-layering reactor could be effectively utilized as a plant for treatment of small village sewage.

다량의 하부위장관출혈이 병발된 Vibrio vulnificus 패혈증 1예

최주연,유진홍,한석원,이대훈,최민호,박순민,김연식,김선우,신완식,강문원,강성구 대한화학요법학회 1996 대한화학요법학회지 Vol.14 No.2

최근 저자들은 Vibrio vulnificus 감염에 의해 패혈증 및 이차성 피부 병변을 보인 42세의 남자 환자의 치료중 하부 위장관 출혈이 병발된 1예를 경험하였기에 보고하는 바이다. We experienced a case of Vibrop vulnificus septicemia which showed an unusual manifestation such as hematochezia. The patient was a 42-year-old man with chronic liver disease. The blood and wound culture revealed the organism. During intensive care, he suffered from massive hematochezi for several days. Colonoscopy and abdominal CT showed findings suspicious of ischemic colitis. To our knowledge, this is the first unusual case of V.vulnificus infection which showed massive lower gastrointestinal bleeding.

이차성 기질화 폐렴이 동반된 피부근염 1예

박철연,권정석,정진욱,이충기,현대성,최정윤 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

Dermatomyositis is characterized by progressive, symmetric, Proximal muscle weakness and a nonsuppurative inflammatory myopathy of unknown etiology involving predominantly skeletal muscles. It is also characterized by typical skin lesions. Interstitial lung disease has a poor prognosis when it is associated with dermatomyositis. Organizing pneumonia is a disease in which granulation tissue fills the lumina of terminal and respiratory bronchioles and extends into the distal airspaces. The cryptogenic nature of the process is appreciated in that organizing pneumonia patterns of injury can be seen in secondary forms of the disease (secondary organizing pneumonia). Organizin pneumonia has been reported to occur in 5~10% in dermatomyositis-polymyositis patients Anti-histidyl tRNA synthetase antibody (anti-Jo-1) is a Predictive disease marker that is reported to occur in up to 70% of patients. We describe a 49-year-old male dermatomyosits patient who presented with organizing pneumonia and was found to have negative anti-Jo-1 antibody.

원형빌렛으로부터 인볼루트 헬리컬 핀을 가진 제품의 비틀림 압출가공공정에 관한 연구

박대윤,진철호,진인태 釜慶大學校 1999 釜慶大學校 論文集 Vol.4 No.1

The twisting and extrusion process of the product with involute helical fin from the round billet is developed by the upper bound analysis. The twisting of extruded product is caused by the twisted die surface connecting the die entrance section and the die exit section linearly. In the analysis, the internal shear surface is defined as the curved twisted plane from the taisting of die surface and the shear work is calculated by the consumption of shear energy The increase rate of angular velocity is determined by the minimization of plastic work. The results of the analysis. It is shown that the angular velocity of the extruded product increases with the die twisting angle, the reduction of area, and decreases with the die length, the friction condition.