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      • 잔디와 시금치의 Thylakoid Membrane으로부터 엽록소-단백질 복합체의 분리와 그 특성

        김병규,장남기 한국잔디학회 1990 한국잔디학회지 Vol.4 No.1

        The chlorophyll-protein complexes were separated from thylakoid membranes of Spinach oleracea and Zoysia japonica by two gel Systems of LiDodSO4-PAGE and LiDodSo4/Urea- PAGE under nondenaturing conditions. Seven chlorophyll~protein complexes of CPI*, CPI, CPII*. CP47, CP43, CP29 and CPII were fractionated from both S,oleracea and Zjaponica by LiDodSO4-PAGE. CPI, CP47 and CP43 contained more chlorophyll a than chlorophyll b. The patterns of their absorption spectra at room temperature were similliar to that of chlorophyll a, judging by their UV-spedtroscopy. On the other hand, CPII* and CPII contained approximately equim-olar quantities of chlorophyll a and b. Additional five chlorophyll-protein complexes not separated in the LiDodSO4-PAGE system were electrophoretically isolated from both S, oleracea and Zjaponica by LiDodSO4/Urca-PAGE. The chlorophyll-protein complex just above LRCII $\alpha$in the gel appears CCII-RC separeted recently. 23 kDa and 20 kDa cho-protein complexes is probably LHCIa and LHCIb as judged from their molecular weight. Two novel chlorophyll~protein complexes designated "CPI7" and "CPI6" were fractionate by this gel system. Their molecular weights respectively. Although the stoichiometry of their components and their roles in thylakoid membranes are not apparant, It is thought that they are another kinds of LHCI.other kinds of LHCI.

      • KCI등재

        Usage Duration, Learnable Attributes, and Consumer Preference

        김병규 한국마케팅학회 2018 마케팅연구 Vol.33 No.2

        When consumers make purchase decisions, they are often presented with long-term usage duration cues (e.g., periods of service contracts). We propose and demonstrate that presenting long-term usage duration cues influences perceived importance of learnable attributes (i.e., attributes that involve learning over the course of usage). Specifically, in the absence of these cues, consumers are unlikely to consider their learning of certain attributes or the learning capabilities of the products/services themselves. When these cues are present, however, they expect learning to occur over time; hence, the perceived importance of attributes involving learning decreases. Building on this, we further demonstrate that when there is a tradeoff between learnable attributes (e.g., ease-of-use) and other attributes (e.g., screen resolution), presenting long-term usage duration cues makes choice options superior in the learnable attributes less attractive compared with options superior in the other attributes. We discuss the theoretical and practical implications of our findings.

      • KCI등재

        Future Contraction Effect in Intertemporal Choice for Durable Goods

        김병규 한국마케팅학회 2018 ASIA MARKETING JOURNAL Vol.20 No.2

        Recent research reported that perception of future time is non-linearly scaled. That is, as objective time gets longer, subjective perception of the objective time does not grow proportionally. The non-linear time perception implies that the same future time feels shorter when it starts in the future than when it starts immediately. The authors call this as a future contraction effect. The current research tests two important implications of the effect regarding consumers’ intertemporal preference for durable goods. First, consumers who contract future more will be more impatient for durable goods compared to those who contract less because the former would feel to use the same durable goods longer when it is purchased immediately. Second, consumers’ impatience will be alleviated when their tendency to contract future is reduced. The authors find support for these predictions through two studies. Taken together, the current research demonstrates a property of time perception that has important ramifications for understanding consumers’ intertemporal preference for durable goods.

      • 내부점 선형계획법에서의 멀티프런탈방법에 관한 연구

        김병규,박순달 한국경영과학회 1995 한국경영과학회 학술대회논문집 Vol.- No.2

        선형계획법의 해법으로 최근에는 내부점기법(Interior Point Method)가 관심을 끌고 있다. 이 내부점 기법은 계산복잡도 뿐만 아니라 수행속도면에서도 우수한 결과를 보이고 있다. 이 방법은 매 회 대칭양정치(Symmetric Positive Definite)인 선형시스템을 풀어야 하는데 이 과정이 전체 내부점 수행시간의 80-90%를 차지한다. 따라서 내부점 기법의 수행속도는 대칭양정치인 선형시스템을 효율적으로 푸는 방법에 달려 있다. 대칭양정치인 선형시스템을 풀기위해서는 상하분해를 이용하게 되는 데 가우스소거를 이용해서 상하 분해를 하는 경우 매 단계에서 행렬의 모든 요소를 가지고 있을 필요가 없다. 행렬의 모든 요소에 대한 정보를 동시에 필요로 하지 않는다. 즉, 현 단계에서 가우스소거와 관련된 열들에 대한 정보만 있으면 상하 분해가 가능하고 이러한 개념을 이용한 방법이 프런탈방법이다. 프런탈 방법은 대형 선형계획 문제를 풀기에 유리하다는 장점이 있다. 이러한 프런탈 방법을 확장해서 동시에 여러 개의 프런탈을 계산하는 방법이 멀티프런탈방법이다. 이 방법은 알고리듬 자체가 병렬처리에 적합하기 때문에 병렬처리과 관련해서도 많은 연구가 수행되고 있다. 본 연구에서는 삭제나무(Elimination Tree)를 이용한 프런탈방법과 프런탈방법에 슈퍼노드의 개념을 도입한 슈퍼노들 프런탈방법등에 대해서 이제까지 연구 현황을 알아보고 프런탈방법에 적합하고 효율적인 자료 구조와 멀티프런탈 방법에 적용 가능한 병렬알고리듬에 대하여 연구하고자 한다. 본 연구결과 기대효과로는 프런탈 방법에 적합하고 효율적인 자료 구조와 멀티프런탈 방법에 적용 가능한 병렬알고리듬을 개발함으로써 내부점 선형계획법의 수행속도의 개선에 도움이 될 것이다.

      • KCI등재

        Citing Behavior of Korean Scientists on Foreign Journals in KSCD

        김병규,강무영,최선희,김순영,류범종,신재도 한국정보관리학회 2011 정보관리학회지 Vol.28 No.2

        There have been little comprehensive research for studying impact of foreign journals on Korean scientists. The main reason for this is because there was no extensive citation index database of domestic journals for analysis. Korea Institute of Science and Technology Information (KISTI) built the Korea Science Citation Database (KSCD), and have provided Korea Science Citation Index (KSCI) and Korea Journal Citation Reports (KJCR) services. In this article, citing behavior of Korean scientists on foreign journals was examined by using KSCD that covers Korean core journals. This research covers (1) analysis of foreign document types cited, (2) analysis of citation counts of foreign journals by subject and the ratio of citing different disciplines, (3) analysis of language and country of foreign documents cited, (4) analysis of publishers of journals and whether or not journals are listed on global citation index services and (5) analysis for current situation of subscribing to foreign electronic journals in Korea. The results of this research would be useful for establishing strategies for licensing foreign electronic journals and for information services. From this research, immediacy citation rate (average 1.46%), peak-time (average 3.9 years) and half-life (average 8 years) of cited foreign journals were identified. It was also found that Korean scientistis tend to cite journals covered in SCI(E) or SCOPUS, and 90% of cited foreign journals have been licensed by institutions in Korea.

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