• 한국문헌정보학회지
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• 제27권
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• pp.75-97
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• 1994

This article is a preliminary analysis for the study on the MARC formats for authorities. It tries to analyze the elements of the authority record. based on GARE, Guidelines for authority and reference entries, prepared by IFLA, from the Korean perspective. Its analysis follows the general structure of GARE, dividing the records into authority entry, reference entry, and general explanatory entry, and suggests and recommends the Korean examples applying the Guidelines. It also recommends that, for the Korean practice for the authority record to be firmly established, first of all, it is necessary to improve the infrastructure for the bibliographic control, including the completion of the rules for the selection of the access points or the headings and for their structure.

• 펄프종이기술
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• 제33권4호
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• pp.1-6
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• 2001

Today's paper industry tries to use greater amount of high yield pulp and recycled fiber and to close mill water system, which results in higher fines content and buildup of organic and inorganic contaminants in white water system. Researches are being focused to develop chemical additives that provide good retention and drainage in a closed papermaking system. A microparticle retention system consisted of cationic guar gum and anionic colloidal silica so has been developed to meet the requirements for improving machine speed and product quality. The objective of this investigation was to determine the effects of the degree of cationic guar gums, charge density and structure of anionic colloidal silica sols, and the degree of system closure on the performances of this microparticle retention system. Cationic guar gums and anionic colloidal silica sols with higher charge densities showed better retention performance. Particularly, wider maximum in retention was obtained when structure colloidal silica was used suggesting as mechanism of microparticle bridging is functioning in this system.

• 건축역사연구
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• 제31권6호
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• pp.33-45
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• 2022

The tombs at the royal level of the Western Han dynasties belong to the five kingdoms of Chu, Liang, Lu, Zhongshan and Changyi, representing the new forms and ideas of the tomb architecture. Taking Shanchuwang Tomb in BeidongShan, Xuzhou as an example, this paper analyzes the architectural structure and symbolic significance of the tomb, and tries to discuss the concept of burial reflected in it.The analysis of the structure of the main body of the tomb reveals the basic logic of the tomb imitating the palace on the ground, and the definition of the nature of the annex reflects its transcendence over the general form of the tomb.

• 한국산업융합학회 논문집
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• 제23권3호
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• pp.463-471
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• 2020

Recently, various tries to apply ROV (Remotely Operated Vehicle) into underwater are being developed. However, due to underwater environment uniqueness, the additional problem must be taken into account when designing an ROV for the inspection of the underwater structure. This is because a GPS-based information method cannot be applied, and the obtainable image is also dependent on the turbidity. Also, it is necessary to be able to satisfy waterproof and operating speeds in consideration of most practical application environments. This paper describes the design results of the ROV system for underwater structure inspection considering the above problems. The designed system applied INS / DVL for location recognition and was configured to support 3D mapping and stereo camera-based image information using sonar depending on visibility. To satisfy the waterproof, a pressure vessel using a composite material was applied. And over-actuated system using eight thrusters to maintain a stable posture and operating speed was applied also. The designed system was verified by structural analysis and flow analysis also.

• 한국실내디자인학회논문집
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• 제15권4호
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• pp.64-72
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• 2006

The purpose of this study is to interpret Korean traditional space as text on the basis of Structuralism. The process of this study is illustrated as follows: At first, this research contains basic concepts and theories of Structuralism and discusses the possibilities of typological approaches in Korean traditional space interpretation. Secondly, As typological structure of traditional space, spacial and visual expressive characteristics in traditional residential space based on traditional thoughts of Koreans formed with inherent consciousness are considered with Hjelmslev's Structuralism and Wonhyo's Whajaeng theory. Finally, This study tries conceptual analysis based on Lacan's Metaphor and Metonymy emerged from unconscious mechanisms about interpretation and induction of the traditional spacial structure for contemporary Application. Structure is a group of elements forming a covariant ensemble. From this point of view, this study validates that texts are understood when methods that bring back to the creative processes and intentions are found by Text Hermeneutics.

• Smart Structures and Systems
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• 제5권1호
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• pp.43-54
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• 2009

This study introduces a novel approach for locating damage in a structure using wireless sensor system with local level computational capability to alleviate data traffic load on the centralized computation. Smart wireless sensor systems, capable of iterative damage-searching, mimic an optimization process in a decentralized way. The proposed algorithm tries to detect damage in a structure by monitoring abnormal increases in strain measurements from a group of wireless sensors. Initially, this clustering technique provides a reasonably effective sensor placement within a structure. Sensor clustering also assigns a certain number of master sensors in each cluster so that they can constantly monitor the structural health of a structure. By adopting a voting system, a group of wireless sensors iteratively forages for a damage location as they can be activated as needed. Since all of the damage searching process occurs within a small group of wireless sensors, no global control or data traffic to a central system is required. Numerical simulation demonstrates that the newly developed searching algorithm implemented on wireless sensors successfully localizes stiffness damage in a plate through the local level reconfigurable function of smart sensors.

• 한국산업융합학회 논문집
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• 제26권5호
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• pp.825-831
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• 2023

The propellers used for big ships have a large diameter and are very heavy. In order to apply a precise and safe work process to them, it is necessary to use an exclusive turning system. For this reason, various techniques are applied to produce them. However, workers' convenience and safety are not taken into consideration enough at production sites. Conventionally, these propellers are designed to be separated as their turning system is loaded and rotated by empty weight. Therefore, it is necessary to replace such a design. This study tries to find the weaknesses of the design and structure of a conventional propeller turning system for large ships, to verify structure integrity of a structure in structural analysis, and to devise a plan for designing a new type of turning system. In the basic concept design and structural analysis for the turning system used in the propeller finishing process for large ships, this study drew the following conclusions. It was possible to develop the work process of the turning system for the propeller finishing process used for large ships, to obtain the dimensions for exterior design through a basic design. Structural analysis was conducted to find the structure integrity of the turning system. As a result, in the rail installed to transfer a gantry, the maximum stress was about 45MPa, about 5.5 times lower than the yield strength 250MPa. Therefore, the turning system was judged to be safe structurally.

• 시스템엔지니어링학술지
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• 제13권1호
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• pp.25-31
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• 2017

This paper aims to evaluate the conservatism in the design of APR1400 (Advanced Pressurized water Reactor 1400 designed by KHNP) reactor internals component, the LSS (Lower Support Structure). Re-engineering of the LSS is done based on the system design condition data and applicable ASME code that was used for the original APR1400 design. Systems engineering approach is applied to design the LSS of APR1400 without refering APR1400 LSS dimensional parameters and tries to verify important design parameters of APR1400 LSS as well as the validity of the re-engineering design process as independent verification method of reactor component design. Systems engineering approach applied in this study following V-model approach. The re-engineered LSS design showed more than enough conservatism for static loading case. The maximum deflection of LSS is under 1mm (calculated value is 0.25mm) from 4000 mm diameter of LSS. Hence the deflection can be ignored in other reactor internals for structural integrity assessment. Especially the effect of LSS deflection on fuel assembly can be minimized and which is one of the main requirements of LSS design. It also showed that the maximum stress intensity is 2.36MPa for the allowable stress intensity of 60.1 MPa. The stress resulted from the static load is also very small compared to the maximum allowable stress intensity, hence there is more than enough conservatism in the LSS design.

• 한국실내디자인학회논문집
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• 제14권3호
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• pp.103-113
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• 2005

As today's cultural environment entered the information society, one of the biggest trends of future is the interests of nationalism. The purpose of this study is to interpret interrelation between sign and space design and analyze Korean contemporary space how to universalize traditional conception and attitude in design. The process of this study is illustrated as follows: At first, this study contains basic concepts and theories of semiotics and discusses the possibilities of semiotic approaches in spatial designs. Since the most outspoken theorist in this field can be found in writings of C.S. Peirce, American philosopher, the theoretical basis for this research Is taken from the Peirce's Semiotics. Secondly, this research tries the conceptual approaches based on traditional thoughts of Koreans formed with the philosophic background occurred with the universe, religion and the nature. And then, it approaches for the typical characteristics of Korean traditional space to interpret the meaning and adopt the triadic structure of sign. The structure is classified in status, icon, index, and symbol to analyze the Korean contemporary space design. Finally, it examines the expression structure of the nature of Korea that is succeeded in contemporary space design as the semiotic analysis of the application examples ; and studies the examples that try to set and solve the concept of space in modern society as the real issues in our cultural situations.

• 자원ㆍ환경경제연구
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• 제11권2호
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• pp.233-260
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• 2002

This paper tries to analyze the efficiency structure and regulatory effects in electric power industry by using total factor productivity and indices based on cost function method. This paper performed an empirical analysis on the efficiency improvement and optimal scale taking the cost aspect in electricity industry into account. By expanding the cost structure framework, this paper proposes the analytical method regarding the needs of technology regulation and presents the empirical results which can be verified. Hence, this work can play a key role in decision-making of the national power development and regulatory policy. The empirical result indicates that the electricity industry in Korea has been in the state of economies of scale until 1980s, However, due to sustained growth of power generation, economies of scale declined and subsided after 1980s and then diseconomies of scale is shown recent years. The analysis on the effect of technology regulation shows the national large-scale base-load power plant development-oriented policy until so far contributed substantial cost effect to the electricity industry. The empirical result indicates that the reserve requirement as one of means of technology regulation policy did not contribute to the economies of scale but positive effect on the total factor productivity in Korea.