소프터웨어 再使用 可能性의 定量的 分析/張華植

장화식 釜山水産大學校 大學院 1995 국내석사

保險環境變化에 따른 長期損害保險의 戰略的 課題

장화식 韓國外國語大學校 貿易大學院 1994 국내석사

輸入代替效果 新製品의 成果決定 要因에 關한 實證的 硏究 : 蔣英實賞 受賞製品을 中心으로

장화식 고려대학교 1995 국내석사

기업의 관계지향성이 관계자산과 성과에 미치는 영향

장화식 韓國外國語大學校 2005 국내박사

Networking between industries and markets facilitated by the spread of internet and advancement in information and communication technology has far-reaching effects on the management strategies of corporations as well as on economies, industries, and markets. A network-based economy, viewing an individual customer as a separate market, has introduced relationship marketing which focuses on enhancing lifetime values of a customer and establishing a long-term relationship with her. Relationship marketing with the concept of 'relationship' at its core aims ultimately at accumulating not only relationship assets owned by a corporation but also social capital in a broader context. A corporation establishes, maintains and reinforces relationships with stakeholders to be equipped with competitive advantages, to improve on its performance, and to ascertain its ultimate survival through cumulative efforts of building relationship assets. Therefore, 'real assets' of a corporation are not physical capital such as machines or factories but relationship assets built upon the stakeholders. Though relationship marketing is recognized among the researchers as a pivotal strategy in terms of competitive advantage and ultimate survival of a corporation, the topic has not yet been paid much attention to from the public. The previous studies on relationship marketing have concentrated on the relationship between corporation and customer or on the management of customer assets, largely ignoring other stakeholders such as suppliers, employees, distributors, etc. It should be addressed how the relationship with the latter influences the performance of a corporation. To be specific, the way in or the extent to which the use of relationship marketing is related with the marketing productivity of a manufacturer should be studied carefully. Therefore, the present study examines the effects of relationship marketing in the context of manufacturing companies. The study concentrates on the effects of relationship-orientation, a behavioral factor of relationship marketing, on the accumulation of relationship assets and the fiscal performance of a corporation. Especially, the scale of a company and product differentiation were used as control variables to separate out the effects of relationship-orientation. Survey questions to which company employees would respond were constructed in such a way to test the posed hypotheses; the questions were modifications or complements of the ones in the previous studies. Reliability and validity analysis for each variable was conducted prior to the tests of hypotheses, using SPSSWIN 10.0. Both SPSSWIN 10.0 and Lisrel 8.30 were used to test the hypotheses about the effects of relationship-orientation or about the differences in the effects of relationship-orientation according to the scale of a company or product differentiation. An analysis of covariance structure showed that the independent variable - relationship-orientation - had a positive effect on the intermediate variables such as supplier assets, customer assets, employee assets, and distributor assets and on the dependent variable - corporate performance. Customer assets, employee assets, and distributor assets, excluding supplier assets, also had a positive effect on corporate performance. The reason why the hypothesis about the effect of supplier assets on corporate performance was rejected seemed to be the low-level of cooperation between the sample companies and their suppliers. In other words, the level of cooperation between purchaser and supplier should go beyond a critical point in order for the relationship to be beneficial to corporate performance. On the other hand, the analysis of covariance structure which has been implemented to examine the differences in the effects of relationship-orientation on relationship assets and corporate performance according to the scale of a company and product differentiation also showed results favorable to the posed hypotheses. That is, large companies were benefited more from relationship-orientation than small- and medium-sized ones, and so were the companies with the high level of product differentiation than the ones with the low level. Suppliers, distributors, customers and employees try to make relationships mainly to obtain scarce resources and to forge competitive advantages. Hence, it is natural for the large companies or the companies with the high level of product differentiation to be preferred in making relationships since the former is generally more abundant in resources while the latter is more likely to be helpful for a company's competitive advantages.

새로운 공개키 프레임워크와 PAN을 위한 응용

장화식 부경대학교 2007 국내박사

Without doubt, the promise of Public Key Infrastructure (PKI) technology has attracted a significant amount of attention to support secure and authenticated services in the heterogeneous networks. The IETF PKIX Working Group is developing the Internet standards to support an X.509-based PKI, which provides a framework on services related to issuing public key certificates and distributing revocation information. The lack of a mechanism that provides efficient and timely distribution of certification revocatino information is a main issue for implementing more efficient PKI environment. The existing certificate revocation schemes place a considerable processing. commucication. and storage overheads on certificate authority(CA) as well as the relying parties. In this thesis, the main target of our research is to provide a new public key framework which reduces the overheads of computation for digital signature generation/verification and communication for verifying the validity of X.509 certificate. Specially, we focus on developing new public key frameworks in Internet and Personal Area Network (PAN) environment. For Internet environment, we review J. Zhou et al's public key framework from the view point of the actual deployment, and propose a new public key framework by changing security parameters into more suitable ones to enhance the actuality and reduce the overheads of computation and communication. Moreover, we analyze the security of our new public key framework from the vulnerability window point of view. A PAN is the interconnection of fixed, portable, or moving components within a range of an individual operating space, typically within a range of 10 meters. In PAN the communication between components should be secure and authenticated since private information and personal data will be transmitted over radio links. Secure and authenticated communication can be achieved by means of proper security protocols and appropriate security associations among PAN components. For the sake of supporting key management in a PAN, a personal CA in the personal PKI concept is responsible for generating public key certificates for all mobile devices within the PAN. The personal CA is used by an ordinary user at home or small office deployment distinguished from large scale or global CA functions. Although the personal PKI concept seems to be properly applied to PAN environment, the adaptation of PKI concept to PAN is not suitable due to the limited resource of the mobile devices. For PAN environment, we propose a new public key framework that reduces computational overheads for generating and verifying signatures on mobile devices. Especially. we focus on eliminating the traditional public key operations on mobile devices by means of one-time signature scheme, and differentiating it from previously proposed server-assisted signatures relied on assistances of a signature server. As a result, the proposed protocol gets rid of inherent drawbacks of server-assisted signatures such as problematic disputes, and high computational and storage requirements on the server side. Moreover, our framework provides simplified procedure for certificate status management based on hash chain to alleviate communication and computational costs for checking certificate status information.

浦項市 都市景觀 計劃方向 硏究

장화식 慶州大學校 大學院 2004 국내석사

경관이라 함은 미적 기준에서 시각적 만족을 주는 토지의 외관이라는 관점에 국한하지 않고, 근래에는 문화경관, 역사경관, 자연경관, 생활경관, 도시경관 등 변용된 경관 개념들이 등장되고 있다. 도시에 있어서 경관연구의 필요성을 단순히 보기좋은 배경을 만든다라던가, 기억할만한 장소를 만든다라던가 하는 것에서 더 나아가 도시문화의 한 속성으로서 경관의 다의적인 기능을 주민들에게 체득케함으로 삶의질 개선이나 도시문화 향유를 위한 직접적인 도구가 되게하기 위한 수단으로서 더욱 필요하게 된다. 이는 이를 시행하기 위한 각종 도시기본계획, 관리계획, 관광개발계획 등에 지침적 요소로 활용되어 도시 조성에 필요한 계획적 수단으로서도 그 필요성이 있다할 것이다. 따라서 본 연구에서는 포항시의 경관계획의 방향을 조감해보고, 시민의 경관 태도 및 선호도 등을 조사, 분석하여 실제 경관개선방안 및 경관계획의 방향을 제시하고자 하였다.