• Journal of Advanced Marine Engineering and Technology
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• v.27 no.1
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• pp.100-107
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• 2003

This study was to control magnetic field orientation-typed sensorless vector control by applying the theory of a rotor flux observer to drive an induction motor. This research suggested a new speed estimation method that estimates speed with the rotor flux obtained by using a flux observer and the variable of state current detected by a current sensor without a speed sensor. Because the speed estimation method is independent from the motor constants, it is not necessary to control the gain of the parameters and the algorithm is simple. In the findings of the study, the researcher was convinced of the control function and the possibility of realization in the simulation experiment of sensorless vector control system by using DSP(Digital Signal Prosessor).

• Korean Management Science Review
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• v.25 no.1
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• pp.75-91
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• 2008

Information strategy planning (ISP) pursues alignment of business strategy and IT (Information Technology) strategy as well as derivation of feasible and valuable IT projects. However, conventional ISP methodology hardly obtains the objectives because of its intrinsic shortcomings. Diverse ways are proposed for the improvement of the conventional methodology including, for example, combination of EA (Enterprise Architecture) with ISP. Meanwhile, six-sigma methodology which is characterized by quantification, scientific and systematic approach, customer orientation, process orientation has been gaining considerable attention and extending its application scope continuously. In this paper, an innovative ISP methodology is proposed by decomposing activities, methods, and tasks from conventional ISP process and reorganizing them into DMADOV six-sigma framework. In addition, the usefulness and applicability of the newly proposed methodology are provided using an electronics company example. The methodology enhance the possibility of producing future oriented and beneficial IT projects by associating IT strategy and the projects in the form of quantified causal relationship. Besides, it can also increase the objectivity of IT vision and strategy.

• Transactions of the Korean Society of Automotive Engineers
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• v.5 no.4
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• pp.199-206
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• 1997

The inner pulley is an automobile component used as air conditioner clutch assembly. In cold forging of inner pulley, the design requirements are to keep the same height of the inner rib and outer one, and to make uniform the hardness distribution in the forged product. In industry, the design of forging processes is performed based on experience-oriented technology, that is, designers experience and expensive trial and error. Using the rigid-plastic finite element simulations. we design the optimal process conditions, which has a preforming operation. Also the final product configuration of forging has to be designed again in view of metal flow involved in the operation, derived from the finite element simulations. The forged pulley is investigated by checking the hardness distribution and it is noted that distribution has improved to be even and high enough for industrial application.

• Journal of the Korea Furniture Society
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• v.17 no.2
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• pp.69-79
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• 2006

German furniture design had been downward in trend after Bauhaus closed and through the War. Meanwhile Italy emerged as a center in furniture industry after the Second World War. After the Unification in 1989, however, German furniture still play predominant role in the world since they have their own unique quality and territory. This study explores the significance of German furniture design by three different eras-Post-war recession (1946-1965), Arising times (1966-1989), Contemporary (1990-2005)-and categorized the major characteristics are summarized as in the below. First, function oriented design Second, pursuing perfection of technology Third, simplicity and purity of design.

• The Korean Journal of Health Service Management
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• v.7 no.3
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• pp.213-224
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• 2013

The purpose of this study is to find out the most successful way for the protection of medical information focusing on the electronic medical record(EMR). In this study, every aspect of the EMR is reviewed in terms of the hospital management. In particular, definitions, major functions, strengths and weaknesses of the EMR are considered. This study also examines the general development of the EMR as well as the current situation of applying the EMR. Important issues such as the protection of patient Medical information, informed consent, and the customer-oriented hospital information system are discussed and interpreted in light of the introduction of the EMR into the area of the hospital management. Finally, in this paper Protection of medical information by major Issues on Patient medical information.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.13 no.11
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• pp.5321-5334
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• 2019

Data mining technology is frequently used in identifying the intention of users over a variety of information contexts. Since relevant terms are mainly hidden in text data, it is necessary to extract them. Quantification is required in order to interpret user preference in association with other structured data. This paper proposes rating and comments mining to identify user priority and obtain improved ratings. Structured data (location and rating) and unstructured data (comments) are collected and priority is derived by analyzing statistics and employing TF-IDF. In addition, the improved ratings are generated by applying priority categories based on materialized ratings through Sentiment-Oriented Point-wise Mutual Information (SO-PMI)-based emotion analysis. In this paper, an experiment was carried out by collecting ratings and comments on "place" and by applying them. We confirmed that the proposed mining method is 1.2 times better than the conventional methods that do not reflect priorities and that the performance is improved to almost 2 times when the number to be predicted is small.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2005.10a
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• pp.207-212
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• 2005

The SM(System Management) is more important than SI(System Integration) in business model of software industry. And the role of ITO(IT Outsourcing) is increasing, recently. Also, The interest of ITIL increasing in the software industry. In the perspective of business, IT organization has been transformed from supportive division the core business organization, IT organization needs the satisfaction of customer’s requirements. So, process oriented IT management is required. In the perspective of technique, according to need of IT infra for a rapid change management, an application management, systematic development and operating process are required. Therefore, this paper analyzes of IT service core process in service support and service delivery that was offered by ITIL using the AHP methodology This paper shows the results of IT service survey in domestic software industry. And this paper gives a guideline of introduction ITIL

• Journal of Yeungnam Medical Science
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• v.30 no.2
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• pp.79-82
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• 2013

The demand for complementary and alternative medicine (CAM) is increasing worldwide. High-technology medicine is not always effective and is often accompanied by neglected self-care and high cost. Also, conventional medicine has become dependent on expensive technological solutions to health problems. Integrated medicine is not simply a synonym for complementary medicine. It involves the understanding of the interaction of the mind, body, and spirit and how to interpret this relationship in the dynamics of health and disease. Integrative medicine shifts the orientation of the medical practice from a disease-based approach to a healing-based approach. In South Korea, CAM education was first provided 20 years ago, and integrative medicine is becoming part of the current mainstream medicine. Increasing numbers of fellowships in integrative medicine are being offered in many academic health centers in the U.S. Also, it has emerged as a potential solution to the American healthcare crisis and chronic diseases, which are bankrupting the economy. It provides care that is patient-centered, healing-oriented, emphasizes the therapeutic relationship, and uses therapeutic approaches originating from conventional and alternative medicine.

• Steel and Composite Structures
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• v.24 no.3
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• pp.309-322
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• 2017

This paper conducted both numerical and theoretical studies to investigate the composite action of notched circular concrete-filled steel tubular (CFT) stub columns under axial compression and established a theoretical method to predict their ultimate bearing capacity. 3D finite element (FE) analysis was conducted to simulate the composite action and the results were in good agreement with experimental results on circular CFT stub columns with differently oriented notches in steel tubes. Parametric study was conducted to understand the effects of different parameters on the mechanical behavior of circular CFT stub columns and also the composite action between the steel tube and the core concrete. Based on the results, a theoretical formula was proposed to calculate the ultimate bearing capacity of notched CFT stub columns under compression with consideration of the composite action between the steel tube and the core concrete.

• Journal of Powder Materials
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• v.22 no.3
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• pp.216-220
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• 2015

Vertically oriented nickel nanowire arrays with a different diameter and length are synthesized in porous anodic aluminium oxide templates by an electrodeposition method. The pore diameters of the templates are adjusted by controlling the anodization conditions and then they are utilized as templates to grow nickel nanowire arrays. The nickel nanowires have the average diameters of approximately 25 and 260 nm and the crystal structure, morphology and microstructure of the nanowires are systematically investigated using XRD, FE-SEM and TEM analysis. The nickel nanowire arrays show a magnetic anisotropy with the easy axis parallel to the nanowires and the coercivity and remanence enhance with decreasing a wire diameter and increasing a wire length.