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        검색결과 40

        21.
        2016.07 구독 인증기관·개인회원 무료
        This study examines when high tech firms are better off specializing in either exploration or exploitation learning strategy. Drawing on the organizational learning literature, we hypothesize that a firm’s imbalance between exploration and exploitation (or specialization strategy) has differential impacts on firm performance depending on its structural characteristics and external environment. A survey data of 180 high tech firms in China shows that firm age and scarcity of R&D resources moderate the relationship between specialization and business performance. Moreover, specialization strategy works better when competitive intensity is low.
        22.
        2016.07 구독 인증기관·개인회원 무료
        We propose that while EMFs’ international diversification promotes new product performance, technological capability actually mediates the relationship between international diversification and new product performance. We further argue that focusing on more developed markets strengthens the positive effect of EMFs’ international diversification on their technological capability accumulated over the process of internationalization, whereas it weakens the impact of EMFs’ technological capability on their new product performance because EMFs have to compete with local and global firms in the more developed target countries. Analysis on Chinese manufacturers’ international efforts provides support for these hypotheses.
        23.
        2016.07 구독 인증기관·개인회원 무료
        We integrate institutional theory and the resource-based view of capability to examine the interplay of institutional environments and firm-specific capabilities on value-creating synergy by emerging market firms (EMFs). We argue that EMFs expand into countries with better-developed institutions as a means to overcome poor institutions at home. EMFs that develop strong absorptive capacity and knowledge transfer capability are better able to benefit from a portfolio of complementary sources of knowledge across multiple markets. We analyze data on a sample of manufacturing firms’ international expansion to demonstrate that expansion into a host country with a better-developed institutional environment promotes innovation success. This effect was found to be stronger for firms with strong absorptive capacity and well-developed knowledge transfer capability.
        24.
        2014.10 구독 인증기관·개인회원 무료
        Taxonomic history of Korean Arctiidae was recently revised by Park (2000), comprising a total of 59 species, 31 genera from South Korea. Subsequently, Choi (2004, 2010) added two more arctiine species, and Bae et al. (2013) enumerated 63 species, 31 genera including one unrecorded species, and Lee et al. (2014) reported one more lithosiine species from South Korea. In the present study, we report and confirmone rare species, Spilarctia robusta (Leech, 1899), which has been reported by Nam (1985) from Jeju Is., but it has been omitted from the Check List of Insects from Korea (1994), due to that no specieman has been collected after Nam (1985). We found this species from the collection of the Korea National Arboretum (2012), and redescribed with illustrations of genitalic structure. Therefore 65 species of Arctiinae are known to the fauna of Arctiinae from South Korea.
        25.
        2014.07 구독 인증기관·개인회원 무료
        In an increasingly dynamic business environment, innovation output occupies a central position among all organizational outputs, not only because it is a primary way in which firms compete and grow, but also because it profoundly influences social and economic evolution (Eisenhardt & Tabrizi, 1995; Sorensen & Stuart, 2000). Understanding the factors that determine an organization’s ability to produce new ideas and continually innovate thus is a fundamental issue in strategic management and marketing fields. Among all sort of determinants, collaboration with buyers to create value through innovation has attracted particular attention from scholars (von Hippel, 1988; Thomke & von Hippel, 2002; Sawhney, Verona, & Prandelli, 2005). This study examined the role of Internet-based collaboration in the buyer-supplier relationship in promoting product innovation of supplying firms. Drawing on the juxtaposition of the governance literature and social exchange theory, we proposed that Internet-based collaboration positively affects product innovation performance of supplying firms, but too much dependence on it impedes product innovation. That is, Internet-based collaboration has an inverted U-shaped relationship with product innovation performance of supplying firms. It further posited that in-person interaction between buying and supplying firms strengthens the positive effect of Internet-based collaboration on product innovation, such that when the degree of in-person interaction is high, Internet-based collaboration is associated with better innovation performance. These propositions were tested using data from a large survey conducted by a survey data on buyer-supplier relationships in China. The results show that Internet-based collaboration has a stronger positive relationship with innovation performance and this positive effect declines after the degree of Internet-based collaboration goes beyond a threshold. Moreover, the first-order effect of Internet-based collaboration is stronger when the degree of in-person interaction is high than when it is low. The optimal level of Internet-based collaboration in low degree of in-person interaction is moderate, whereas when in-person interaction is more frequently used in connecting with buying firms the optimal level rises. These results provide strong supports for the predictions of hypotheses.
        26.
        2014.04 구독 인증기관·개인회원 무료
        The family Erebidae (Lepidoptera, Noctuoidea) is one of four quadrifid noctuoid families recently redefined by Zahiri et al. (2011) and Zaspel et al. (2012). Fibiger and Lafontaine (2005) verified the monophyly of Erebidae in terms of morphology but retained Arctiidae and Lymantriidae as separate families. These two groups were readjusted as erebid subfamilies in the latest phylogeny of Noctuoidea (Zahiri et al., 2011), and by van Nieukerken et al. (2011). Erebidae, as currently defined comprises 1760 genera and 24.569 species (van Nieukerken et al., 2011), representing the largest family of the Lepidoptera. The quadrifid Noctuoidea describes taxa in which forewing vein M2 arises closer to the origin of M3 than M1, in the lower part of the discal cell, so that the cubital vein appears to be four-branched; M2 in the hindwing is present giving vein Cu a four-branched appearance. Taxonomic study of the Arctiidae in Cambodia has been done by a few foreign entomologists. As the results of this study, about 98 species of 45 genera belonging to Arctiidae were recorded from Cambodia, most of them are recorded for the first time in Cambodia.
        27.
        2012.06 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        The study aims to tind out the patterns of negotiation of meaning among non-native speakers in CMC environment, particularly in video conference mode. The two Chinese students and two Korean students participated in 12 video conference sessions and accomplished infonnation gap tasks for 6 weeks. The researchers compared the patterns of negotiation of meaning occurred during video conferencing of two group settings: the same ethnic group and the different ethnic group settings. The research results show that in the same ethnic groups, lexical errors and content triggered most meaning negotiations while content and phonological errors in the different ethnic group settings. There is a clear tendency to indicate non-understanding of a lexical trigger through a local indicator in the same ethnic group while global nonunderstanding indicators caused by phonological and content triggers occurred more frequently in the different ethnic groups. At the response stage, in the same ethnic groups, rephrasing and elaboration were the most commonly used strategies to minimize non-understanding whereas in different ethnic groups, about half the responses fa ll in the category of minimal. The effects of video conferencing as a CMC tool and the advantages of non-native interactions as a way to promote cross-cultural understanding were discussed based on research resu lts.
        6,000원
        28.
        2006.04 구독 인증기관·개인회원 무료
        nanoparticle was synthesized by the flame method, which was controlled by varying the ratio and flow rate of gas mixtures consisting of oxygen (oxidizer), methane (fuel) and nitrogen (carrier gas). The crystalline phases of nanoparticle depended strongly on the temperature distribution in the flame, whereas the morphology was not sensitive. We proved that the anatase phase formed without the phase transformation in the flame and the rutile phase generated through several phase transformations.
        30.
        2023.05 서비스 종료(열람 제한)
        This article combines Chinese tea culture with badminton, based on the inherent meaning of tea culture, with the ethical issues that exist in badminton. The article explains tea and the long history of tea culture. The intrinsic meaning of tea culture is analyzed more thoroughly and is combined with the current ethical problems that exist in badminton in a corresponding way. The role and significance of the existence of tea culture is indicated to badminton and even other sports.
        31.
        2022.10 서비스 종료(열람 제한)
        Based on improving the ethics of badminton among the public, this article summarizes the problems and corrections that need to be made when practicing badminton among the public badminton students. The ethical issues are integrated into badminton, popularized and learned to comply. The article identifies the problems from the current situation of some badminton players in Qingdao, analyzes these ethical problems from an ethical point of view, and solves the ethical problems by applying ethics to the learning life of these players according to the current situation. At the same time, the coach’s own example should also pay attention to assist other social institutions and groups to reach an atmosphere of universal compliance with learning ethics, in order to make the specific students in the process of learning badminton, there will be no ethical problems. Only then can the public badminton, the public sport to better development, national fitness can also be more orderly, more healthy development.
        32.
        2016.07 KCI 등재 서비스 종료(열람 제한)
        교사의 수행의 체계적인 평가에 대한 요구의 결과 최근 미국 40개주 600개의 교사교육기관을 통해 교사 수행 평가 (edTPA) 체계가 시행되고 있다. 그러나 이 새로운 평가에 대비해서 교사 양 성 기관에서 어떻게 교사 양성 프로그램의 질을 높이고 예비 교사를 준비시켜야 하는 가에 대한 연구는 미흡한 실정이다. 본 연구에서는 미국의 한 교사 양성 기관을 대상으로 edTPA 준비를 위 한 교사 양성 프로그램의 효율성과 edTPA 준비 자체가 얼마나 예비교사들의 교수 전문성 향상 에 긍정적인 영향을 미치는 지에 대한 예비교사들과 대학 감독관들의 인식을 조사한 것이다. 99 명의 예비교사와 14명의 대학 감독관들이 이 연구에 참여하였다. 교사 인식 설문지가 주요 데이 터로 수집되었으며, 기술 통계 분석 및 One-way ANOVA를 이용한 양적 연구 분석방법과 설문 문항 데이터에 대한 질적 연구 방법이 병행되었다. 연구의 결과에 근거하여 예비교사들의 edTPA 준비와 교수 전문성 향상을 위한 제안들이 기술되었다. 마지막으로 edTPA 준비와 시행과정의 경 험을 바탕으로 한국 예비교사들의 교수 전문성 평가 체계에 대한 제고가 기술되었다.
        33.
        2015.07 서비스 종료(열람 제한)
        Salt is the major factor limiting crop productivity in saline soils. Development of genetic basis of high salt-tolerant rice is necessary to satisfy urgent needs in rice breeding. In this study, 295 rice accessions from a Korean authentic core set were used to identify the evolution associated genes regarding salt tolerance. By using McDonald-Kreitman Test (MKT), we detected orthologous genes in rice (Oryza sativa) using Brachypodium as an outgroup to investigate fast evolved genes that express differentially based on distinct phenotypic groups. Three groups which represented the salt sensitive (group 1), salt medium tolerant (group 2) and salt tolerant (group 3) were separated and each group was examined with the outgroup in neutral and non-neutral polymorphism together with the divergence levels. Total 53 fast evolutionary genes that have a positive selection with FDR ≤ 0.05 were found in the three groups. Among them, 15, 31 and 7 genes were included exclusively in group 1, 2 and 3, respectively. Annotation of these genes showing the predicted functions were checked. Two genes were found to be related to high salt tolerance based on the previous studies. Besides, association study of the candidate gene alleles and salt tolerance phenotype was carried out, indicating that these genes were correlated with salt tolerance. All these result support that using this type of evolution study, we may find some important candidate genes which are related to important traits in rice, such as the salt tolerance, providing important information for future gene based molecular breeding and functional analysis in rice.
        34.
        2014.07 서비스 종료(열람 제한)
        Salt toxicity is the major factor limiting crop productivity in saline soils. Rice is an important staple food crop of nearly half of the world population and is well known to be a salt sensitive crop. The completion and enhanced annotations of rice genome sequence has provided the opportunity to study functional genomics of rice. With the rapid development of the biotechnology techniques, we can use more accurate and reliable methods to study the mechanism and function in different stress conditions. In present study, 295 rice accessions of diverse origin were re-sequenced and used for genome-wide association study (GWAS) with several germination-related traits, including germination percentage (GP), germination energy (GE), germination rate (GR), germination index (GI), salt tolerance index (STI) in salt tolerant germination stage. Phenotyping of the rice accessions were carried out at 200mM NaCl to screen salt tolerance levels. GWAS was applied to detect the associated genes related to salt tolerance in rice germination stage. Variations and haplotypes of the associated genes were detected and correlation between the phenotypes and genotypes were validated using qRT-PCR.
        37.
        2002.12 KCI 등재 서비스 종료(열람 제한)
        In buckwheat, interspecific hybrids with perennial species could provide the opportunity to introgress new and useful characters into annual species. An in vitro embryo rescue procedure, previously developed to produce interspecific hybrids of selfpollina
        38.
        2001.12 서비스 종료(열람 제한)
        It was reported in our Previous paper that the fermented products from Gloeostereum incarnatum strongly inhibit the growth of six kinds of bacteria in human bodies. In this paper the appropriated conditions of immersing culture for the strain 8 903 of Gloeostereum incarnatum was analysed. And the output of the hypha and fermentative product was determined or compared. The prelimenaryresults showed that the appropriated conditions for the growth of Gloeostereum incarnatum are: (1)culture medium:glucose 3%; protein peoptne 0.2%; soybeancake power 1% yeast power 0.3%; KH2PO40.05%; MgSO4 0.03%; CaCO3 0.01%; vitamin Bl 0.001%; befor sterilization pH Value of six should be maintained; (2) temperature; 27f ~28f ; (3) time; about 200 hours; (4) ventilation; (30%∼50%)/min. The sigh of the end culture are: pH coming down about 4: remnant glucoses less 1%; amino nitrogens about 20%; time about eight days. In the aforementioned conditions, the output of fermentative product achieve to 2.5∼3g/L.
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