• Journal of applied mathematics & informatics
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• v.7 no.2
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• pp.507-516
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• 2000

In the present paper we consider a problem of choosing the rational way to carry on the metal processing (the problem of stochastic optimization) and the problem of determing the unknown characteristics of parameters described with random variables.

• The Journal of Information Technology and Database
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• v.6 no.2
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• pp.87-100
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• 1999

This paper proposes analyses of characteristics and the technical components of Korean enterprise network. Based on a survey from professionals of Korean companies, we present statistical summaries of building blocks of hardware and software of the networks implemented in Korean companies. We also perform statistical analyses to find the relationships among the technical components and to extract major technical factors that differentiate enterprise networks by the business types and the size of the companies. We conclude that some of the technical factors are closely correlated and some of them are found to differentiate networks by the business types and the size of the companies.

• Journal of Science and Technology Studies
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• v.13 no.2
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• pp.111-136
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• 2013

Meeting and solving persistent societal problems and challenges through science, technology, and innovation is now an emerging policy agenda in Korea. This socially-oriented innovation needs integrated approach on technological and social innovation. This study aims to suggest the necessity of new process named 'socio-technical planning' and propose its characteristics and implications. It deals with some cases of socio-technical planning activity and classifies their characteristics and types. And then, this study suggests the direction of socio-technical planning development.

• Structural Engineering and Mechanics
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• v.81 no.6
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• pp.737-750
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• 2022

Timber-Concrete Composite construction system consists of combining timber beam or deck and concrete with different connectors. Different fastener types are used in Timber-Concrete Composite systems. In this paper, the effects of two types of fasteners on structural behavior are compared. First, the notches were opened on timber beam, and combined with reinforced concrete slab by fasteners. This system is called as Notched Connection System. Then, timber beam and reinforced concrete slab were combined by new type designed fasteners in another model. This system is called as Notched-Slab Approach. Two laboratory models were constructed and bending tests were performed to examine the fasteners' effectiveness. Bending test results have shown that heavy damage to concrete slab occurs in Notched Connection System applications and the system becomes unusable. However, in Notched-Slab Approach applications, the damage concentrated on the fastener in the metal notch created in the slab, and no damage occurred in the concrete slab. In addition, non-destructive experimental measurements were conducted to determine the dynamic characteristics. To validate the experimental results, initial finite element models of both systems were constituted in ANSYS software using orthotropic material properties, and numerical dynamic characteristics were calculated. Finite element models of Timber-Concrete Composite systems are updated to minimize the differences by manual model updating procedure using some uncertain parameters such as material properties and boundary conditions.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.32 no.2
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• pp.68-73
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• 2000

• Proceedings of the Korean Fiber Society Conference
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• 2007.11a
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• pp.229-230
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• 2007

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.81-85
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• 2006

The ultra-high definition TV system nicknamed "Super Hi-Vision" is a television system with 4000-scanning-line video and 22.2 multichannel sound. NHK has been developing it with the aim of creating a broadcasting system conveying a strong sensation of presence. We believe that it is important to design the system by taking into account human factors such as human visual system characteristics. This paper describes the psychological and physiological experiments on the visual effects of "Super Hi-Vision".

• Proceedings of the KIEE Conference
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• 1991.07a
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• pp.60-63
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• 1991

Nowadays inverters are widely used for energy-saving and factory automation. Accordingly the characteristics and functions of the inverter are well understood. To our surprise, the characteristics and functions of the inverter-driven induction motor are not well understood. In this technical review, the electrical and mechanical characteristics of the inverter-driven motor, the optimal combination of the inverter with motor, the special design of the inverter-driven motor, and the application of the inverter with the existing motor are given, based on ABB Drives' experiences and technical data.

• Journal of Electrical Engineering and Technology
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• v.10 no.3
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• pp.847-858
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• 2015

Control strategy and corresponding parameters have significant impacts on the overall technical and economic characteristics of composite energy storage systems (CESS). A better control strategy and optimized control parameters can be used to improve the economic and technical characteristics of CESS, and determine the maximum power and stored energy capacity of CESS. A novel coordinated control strategy is proposed considering the coordination of various energy storage systems in CESS. To describe the degree of coordination, a new index, i.e. state of charge coordinated response margin of supercapacitor energy storage system, is presented. Based on the proposed control strategy and index, an optimization model was formulated to minimize the total equivalent cost in a given period for two purposes. The one is to obtain optimal control parameters of an existing CESS, and the other is to obtain the integrated optimal results of control parameters, maximum power and stored energy capacity for CESS in a given period. Case studies indicate that the developed index, control strategy and optimization model can be extensively applied to optimize the economic and technical characteristics of CESS. In addition, impacts of control parameters are discussed in detail.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2017.05a
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• pp.85-85
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• 2017

ISO (International Organization for Standardization) is an independent, non-governmental international organization with a membership of 163 national standards bodies (NSB). The ISO standards are developed and processed within the technical committees (TC) or their subcommittees (SC) dealing with the different subject matters. The first technical committee, ISO/TC1, deals with screw threads and was created back in 1947. While, more recently, TC 309 was created to standardize organizational governance. The ISO technical committee in the field of metallic coatings was created in 1962 with the title ISO/TC107- Metallic and other inorganic coatings. This ISO/TC107 technical committee is dealing with the standardization of the characteristics of protective and decorative metallic coatings applied by electrolysis, fusion, vacuum or chemical means, mechanical deposition and ion plating. similarly, it also covers the standardization of the characteristics of protective and decorative non-metallic coatings (excluding paints and other organic coatings) on metal surface applied by electrolysis, fusion, vacuum or chemical means. Scope is further extended to the Standardization of the preparation of the substrates prior to the deposition of metallic and inorganic coatings. There are a total of 144 existing ISO standards published by this technical committee and has 19 participating countries (P-members) and 24 observing countries (O-members). Korean Agency for Technology and Standards (KATS), being the secretariat of ISO/TC107, is constantly supporting this technical committee for the development of standards and related activities.