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      • 전자상거래(Electronic Commerce)의 問題點과 改善方案에 관한 硏究

        白基彦,鄭斗鎭,具敎鳳 대구산업정보대학 1999 논문집 Vol.13 No.1

        In recent years, there is a commercial transaction through an electronic commerce which is considerably progressed and it brings about lots of changes of consumption patterns. Corresponding to these changes, domestic enterprises and customers are need conversion of recognition on the electronic commerce. Besides, the potential market of electronic commerce in 21C toward enlargement, so our enterprises need confrontation spirit in order not to be made inroad by foreign markets. Therefore, this study was suggested on the methods for the solutions on the every situation of an electronic commerce, related case studies, increasing number of limited user, enhance searching speed, securing of personal information, and legality on the commercial transection etc. These matter should be enact international standard laws for the electronic commerce users.. In addition to these, the customers also should be satisfy on the Web. Finally, market products through a electronic commerce will enhance the competitive edge of enterprises respectively. Electronic commerce will settle as a new paradigm in the field of management in the 21C and advance rapidly.

      • KCI등재
      • 부분 탄성기초를 갖고 종동력을 받는 보의 플러터 불안정

        류봉조,류시웅,조창기,이종원 한밭대학교 생산융합기술연구소 2004 생산기반기술연구소 논문집 Vol.4 No.1

        In this paper, the dynamic stability of a cantilevered beam partially attached to elastic foundations and subjected to a follower force is studied. The beam has a concentrated mass at an arbitrary position on it. Governing equations are derived by extended Hamilton's principle and the finite element formulations are applied to obtain discretized equations. The influence of some parameters, such as the elastic foundation parameter, the position of partial elastic foundations, mass ratios and rotary inertia of the concentrated mass on the critical flutter load is investigated. Finally, the optimal attachment ratio of partial elastic foundation which maximizes the critical flutter load is found.

      • KCI등재

        토사자류의 抗酸化作用에 對한 硏究

        金俸秀,朴涌基,康秉秀 대한본초학회 1997 大韓本草學會誌 Vol.12 No.1

        Cuscutae Semen extracts( Cuscuta japonica Choisy and Cuscuta australis R. Brown) were biologically evaluated in vitro and in vivo for the effects on anti-lipid peroxidation, the activities of free radical scavenging enzymes, and the content of carbonyl compound in rat liver tissues, In general, both Cuscutae Semen extracts decreased the lipid peroxides and carbonyl content in a dose-dependent manner and increased the enzyme activities dose-dependently, however, the effects of Cuscuta australis R.Brown is stronger than those of Cuscuta japonica Choisy. The obtained results are summarised as follows: 1. Cuscutae Semen extracts were decreased significantly the lipid peroxides in a dosedependent manner. The anti-lipid peroxidative effect of Cuscuta australis was stronger than that of Cuscuta japonica. Among the various extracts, methanol fraction is most effective and butanol fraction showed a weakest effect. 2. The radical scavenging effect of Cuscuta australis was stronger than that of Cuscuta japonica. The methanol fraction was most active, however, hexane and chloroform fractions exhibited practically no effect. 3. The inhibitory effect of Cuscuta australis on catalase activity was stronger than that of Cuscuta australis. 4. The inhibitory effect of Cuscuta australis on superoxide dismutase activity was somewhat stronger than that of Cuscuta japonica 5. The inhibitory effect of Cuscuta australis on the activities of GSH peroxidase, GSH S-transferase, and GSH-reductase were highter than those of Cuscuta japonica. 6. The extract of Cuscuta australis reduced the carbonyl content more stronger than that of Cuscuta japonica. In conclusion, two kinds of Cuscutae Semen exhibited significant antioxidative effects, among them, the effect of Cuscuta australis was stronger than that of Cuscuta japonica.

      • KCI등재

        [논문] '팩션(faction)'으로서 역사 : 『다빈치 코드』 읽기

        김기봉 부산대학교 인문학연구소 2006 코기토 Vol.60 No.-

        The purpose of this article is to show The Da Vinci Code is a post-modern historiography based on the post-modern historical theory which denies the dichotomy of fact and fiction. Dan Brown argues that the Christianity of today is not the religion of Jesus, but that of winners. These winners include, first, men like Pietro and second, powerful persons like Constantine I. Dan Brown’s The Da Vinci Code tries to tells a rather herstory of Christianity than its history by decoding that the person suppressed by the two groups is Maria Magdalene. Such a herstory is a ‘faction’, which is a combination of fact and fiction. There is an old saying that “winners wrote a history, and losers wrote a novel.” If it is true, ‘faction’ that destroys the barrier between fact and fiction can tell the truth. Just as Hyden White argues in Metahistory, the plot putting individual facts together a story is made by historian’s imagination. Because historians invent the plot as much as discover it on the way of reading historical sources, every historiography is ultimately a ‘faction’ to combine fact and fiction.

      • 이동체의 현재 위치 검색을 위한 해쉬 기반 색인 구조의 설계

        전봉기 신라대학교 자연과학연구소 2004 自然科學論文集 Vol.13 No.-

        Location-Based Services(LBS) give rise to location-dependent queries of which results depend on the locations of moving objects. One of important applications of LBS is to examine tracks of continuously moving objects. Moving objects databases are difficult to use by existent spatial indices such as the R-tree, the grid-file, the quad-tree, the KDB-tree and so on. Because the position of moving object changes continuously, there is problem that expense that the existent spatial index structure reconstructs index dynamically is overladen. In this paper, I propose a dynamic hashing index that insertion/delete costs are low. The dynamic hashing structure is that apply dynamic hashing techniques to combine a hash and a tree to a spatial index. I analyzed the dynamic index structure and the cost model by the frequent position update of moving objects and verified through a performance assessment experiment.

      • 힌두이즘의 神性(Devata) 意味 小考

        尹起鳳 대진대학교 1993 大眞論叢 Vol.1 No.-

        Theisticand atheistic philosophies in India have often been mixed up with theological discussions which throw some light on the existence and nature of God. The idea of God is almost universal and instinctive also in India. India have a variety of pictures of God. This variety is easily intelligible when we realise that each religious genius spells out the mystery of God. In Rg-Veda these descriptions of God often conflict with one another But these descriptions depends on the concept of lower self and the concept of the Supreme Self in B.G. which may be outlined as below. 1) The lower self and the Supreme Self are both eternal. 2) The Supreme Self is an Infinite Unit. 3) The Supreme Self in the universe is omnipresent 4) Within a limited range, the lower self is allowed to function. 5) The Supreme Self is perfect in all respects. In this structure, Conclusion is that The formula 『Sat』alone could not have distingushed 'Him' from the two other entities that 『Cit』. Sat-Cit would confuse him with the souls, as they both 'are and know' Sat-Cit-anand brings out both his similarities with and points of difference from souls and matter.

      • 天安삼거리公園基本計劃에 關한 硏究

        安奉遠,李錫孫,姜喆基,林秀眞,金恩一 경희대학교 1988 造景論叢 Vol.1 No.1

        The goal of this study is to propose a plan for the construction of Chonan Samgori park. Present this park is designated a neighborhood park of Chonan city. This park is located on the point of traditionally important traffic point linked to Samnam province. And, this place is where the perspective experience of history and culture, which is a unique folk related activities. The site which covers about 96,000㎡is located about 4 km from the cityhall of Chonan city. This basic idea of this plan is to reconstruct the ancient culture and traditional way of life which is rapidly disappearing, to offer the place of education of vernacular culture, to give the recreation place to be a center where city dwellers release and enjoy. Facilities of this park are divided into five groups according to function such as support facilities, folk facilities, play facilities, educational and cultural facilities, and landscape facilities. Design principles are established as follows; to provide the folk park with identity, effectively to admit the folk-related activities, to maintain a functional linkage between facilities. The frame works for final master plan are Landuse plan, Circulation plan, Planting Plan, Facility plan.

      • 개잎갈나무(Cedrus deodara)의 Allelopathy 效果

        房基燮,吉奉燮 圓光大學校 基礎自然科學硏究所 1986 基礎科學硏究誌 Vol.5 No.1

        Aqueous extracts of Cedrus deodara inhibited seed germination of Pennisetum alopecuroides, Aster agteratoides, Cassia tora and Oenothera odorata. The degree of inhibition on the germination became severe with increasing concentration. And tests using treatment with aqueous extracts in different developmental stages of each species demonstrated that the inhibition of growth was in the order : seed> 1 leaf stage> 3 leaves stage> 5 leaves stage, but the effect was decreased slightly from 5 leaves stage. To detect the inhibitor, allelochemicals, TLS and HPLC habe employed and 5 phytotocix substance were identified from the leaves of C. deodara. It is assumed that p-Hydroxybenzoic acid may be attributed to the main allelopathic effects of C. deodara on the tested species in this study.

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