• Title, Summary, Keyword: ISM

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Empirical Validation of Customer Characteristics on Internet Shopping Mall Usage (사용자 특성이 인터넷 쇼핑몰 이용에 미치는 영향에 관한 실증적 연구)

  • 김정욱;주형진
    • Journal of the Korean Operations Research and Management Science Society
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    • v.27 no.4
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    • pp.149-165
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    • 2002
  • This study establishes key factors on ISM (Internet Shopping Mall) performance in Korea. The four factors are derived from the relevant literature and clarified the concept of ISM characteristics, customer characteristics, ISM evaluation level. and perceived risks by distinguishing between its components and determinants. ISM performance indicators were derived from the previous studios classifying by ISM attitude and ISM usage. We examine on the impact of ISM characteristics and customer characteristics on the ISM evaluation level, then its level and perceived risks on the ISM performance. Hypotheses on four factors of ISM performance were tested for 172 respondents. Results indicate that four factors may partially serve as key predictors on ISM performance. ISM characteristics and customer characteristics was found to be positively influenced on ISM evaluation level, and its level also positively affected on ISM performance while perceived risks negatively affected on ISM performance.

Study on the Revision of Radio Regulations for the Promotion of a Domestic ISM Industry (국내 ISM 산업 활성화를 위한 제도개선 방안)

  • Park, J.A.;Chun, J.Y.;Park, S.K.
    • Electronics and Telecommunications Trends
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    • v.22 no.2
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    • pp.102-113
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    • 2007
  • 본 논문에서는 미국, 유럽, 일본의 ISM 제도를 소개하고, 국내 ISM 제도의 개선사항과 개정방향을 제안하였다. 국내 ISM 제도의 개선사항으로는 ISM 대역에서 ISM 기기의 전계강도 기준 개정, 생활편의형 ISM 기기의 인증대상기기 확대, ISM 대역 외에서의 전파통신서비스 보호를 위한 혼신규정 신설과 ISM 기기의 불요파 기준 검토 등을 제시하고 있다. 본 논문에서 제안된 개선방안은 국내 ISM 제도 선진화에 기여할 것으로 기대한다.

Study on Radiation Limit of ISM Equipment for Protecting Radio Device (무선기기 보호를 위한 ISM 기기의 방사 한계치에 관한 연구)

  • Shim, Yong-Sup;Lee, Il-Kyoo;Hong, Seon-Eui
    • Journal of Satellite, Information and Communications
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    • v.6 no.2
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    • pp.10-14
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    • 2011
  • This paper suggests the method to calculate radiation limit of ISM(Industrial Scientific Medical) equipment in order to protect radio device in the situation that ISM equipment and radio device are operated in near distance. The factor for correction and protection ratio which is need for protecting radio device were considered to calculate radiation limit of ISM equipment. Also, the scenario which is required to limit radiation power of ISM equipment was referred and the S/W for calculation of radiation limit was developed by using GUI(Graphical User Interface) on Matlab. The suggested method for calculation of radiation limit of ISM equipment will be used to protect radio device from ISM equipment.

The impact of ram pressure on the multi-phase ISM probed by the TIGRESS simulation

  • Choi, Woorak;Kim, Chang-Goo;Chung, Aeree
    • The Bulletin of The Korean Astronomical Society
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    • v.43 no.1
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    • pp.62.1-62.1
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    • 2018
  • Galaxies in the cluster environment interact with the intracluster medium (ICM), losing the interstellar medium (ISM) and alternating their evolution. Observational evidences of the extraplanar ISM stripped by the ICM's ram pressure are prevalent in HI imaging studies of cluster galaxies. However, current theoretical understanding of the ram pressure stripping (or ICM-ISM interaction in general) is still limited mainly due to the lack of numerical resolution at ISM scales in large-scale simulations. Especially, self-consistent modeling of the turbulent, multiphase ISM is critical to understand star formation in galaxies interacting with the ICM. To achieve this goal, we utilize the TIGRESS simulation suite, simulating a local patch of galactic disks with high resolution to resolve key physical processes in the ISM, including cooling/heating, self-gravity, MHD, star formation, and supernova feedback. We then expose the ISM disk to ICM flows and investigate the evolution of star formation rate and the properties of the ISM. By exploring ICM parameter space, we discuss an implication of the simple ram pressure stripping condition (so called the Gunn-Gott condition) to the realistic ISM.

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The impact of ram pressure on the multi-phase ism probed by the TIGRESS simulation

  • Choi, Woorak;Kim, Chang-Goo;Chung, Aeree
    • The Bulletin of The Korean Astronomical Society
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    • v.43 no.2
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    • pp.33.1-33.1
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    • 2018
  • Ram pressure stripping by intracluster medium (ICM) can play a crucial role in galaxy evolution in the high-density environment as seen by many examples of cluster galaxies. Although much progress has been made by direct numerical simulations of galaxies (or a galaxy) as a whole in a cluster environment, the interstellar medium (ISM) in galactic disks is not well resolved to understand responses of the ISM in details. In order to overcome this, we utilize the TIGRESS simulation suite that focuses on a local region of galactic disks and resolves key physical processes in the ISM with uniformly high resolution. In this talk, we present the results from the solar neighborhood TIGRESS model facing the ICM winds with a range of ram pressures. When ram pressure is weaker than and comparable to the ISM weight, the ICM winds simply reshape the ISM to the one-sided disk, but star formation rates remain unchanged. Although there exist low-density channels in the multiphase ISM that allow the ICM winds to penetrate through, the ISM turbulence quickly closes the channels and prevents efficient stripping. When ram pressure is stronger than the ISM weight, a significant amount of the ISM can be stripped away rapidly, and star formation is quickly quenched. While the low-density gas is stripped rapidly, star formation still occurs in the extraplanar dense ISM (1-2kpc away from the stellar disk). Finally, we quantify the momentum transfer from the ICM to the ISM using the mass-and momentum-weighted velocity distribution functions of each gas phase.

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Customer buying process based Managerial factors for ISM Differentiation (ISM 차별화를 위한 고객 구매 프로세스 기반 관리 요소 분석)

  • Yoo, Weon-Sang;Han, Hyun-Soo;Koo, Ja-Heon
    • Journal of Intelligence and Information Systems
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    • v.15 no.3
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    • pp.81-102
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    • 2009
  • In this study, we investigated how to achieve differentiation for the ISM (Internet Shopping Mall) to improve profitability, which is required for survival in the fiercely competitive ISM industry. We analyzed implementation level key managerial factors that could contribute to the differentiation of the ISM. The research model is constructed through integration of two distinctive research streams of e-commerce. The one is B2C differentiation strategy research, most of which are conceptual and conducted at a strategy level, and the other is empirical research analyzing the antecedents of customer satisfaction at the ISM. This study is organized as follows. First, we draw upon transaction cost theory to organize constructs representing customer value associated with the customer buying decision process. Next, after reviewing comprehensive managerial factors that could impact on customer value, we selected 15 managerial factors that could contribute to the differentiation of the ISM to deliver value to customers. Finally, the resulting structural model is validated through empirical analyses. The results provide insights for future studies on ISM differentiation.

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A Study on the Change of Domestic Marine Accidents and Insurance rates According to Enforcement of ISM Code (ISM Code 도입에 따른 국내 해양사고 및 보험율 변화에 관한 연구)

  • Yang, Hyoung-Seon;Noh, Chang-Kyun
    • Proceedings of KOSOMES biannual meeting
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    • pp.47-51
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    • 2006
  • The variation of marine accidents and ship's insurances is to be the measurement of assessment concerned effect of importing ISM Code because each kind of ship accident's expenses and compensation for the loss have an effect on the ship's insurance and P&I insurance. Therefore in this study, we had grasped the accomplishment of importing ISM Code, using analysis of the variation of marine accidents and ship's insurances in domestic shipping companies from one year ago to 8 years after importing ISM Code. As the result of analysis, compared with the period of a year before carrying out ISM Code, marine accidents were showed a decrease of about 14.4% at 8th year of importing ISM Code. Also, the insurance had tended downward every year.

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A Study on the Change of Domestic Marine Accidents and Insurance Rates according to Enforcement of ISM Code (ISM Code 도입에 따른 국내 해양사고 및 보험율 변화에 관한 연구)

  • Yang, Hyoung-Seon;Noh, Chang-Kyun
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.16 no.1
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    • pp.65-69
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    • 2010
  • The variations of marine accidents and ship's insurences are measures for assessing the effects of ISM Code implementation, bemuse expenses for the treatment of ship accidents and compensations for the loss have an effect on the ship's insurence. In order to understand the results and accmplishements of ISM Code implementation in Korea, the rise and the fall of marine accidents and ship's insurences were analyzed and examined in domestic shipping companies from one year before implementation to eight years after implementation of ISM Code. As the result of analysis, compared with the period of a year before implementation of ISM Code, the decrease of about 14.4% in marine accidents was shown in the 8th year after ISM Code implementation in Korea, and ship's insurance rates tended to decrease from year to year.

A Basic Study on Development of ISM Code Operation Evaluation Model Using AHP (AHP를 이용한 ISM Code운영평가 모형 계발에 관한 기초적 연구)

  • Shin Chul Ho;Noh Chang Kyun
    • Proceedings of KOSOMES biannual meeting
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    • pp.93-97
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    • 2003
  • This study conducted a basic study to develop ISM Code operation evaluation module, which is part of development of Safety Management System(ISM Code) Implementation supporting module. In particular, the significant of this study is that it established AHP operation evaluation analysis process, the design of questionnaire, and the hierarchical structure of operation evaluation model standard, focusing on the development of ISM Code operation evaluation module. Also, this study has its value in the point that it attempted to apply AHP scheme, which is part of the main decision-making in management science field, to develop operation evaluation module.

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