• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.36 no.2
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• pp.163-170
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• 2008

The aeroelastic stability analysis of a soft-in-plane, composite hingeless rotor blade in hover and in forward flight has been performed by combining the mixed beam method and the aeroelastic analysis system that is based on a moderate deflection beam approach. The aerodynamic forces and moments acting on the blade are obtained using the Leishman-Beddoes unsteady aerodynamic model. Hamilton's principle is used to derive the governing equations of composite helicopter blades undergoing extension, lag and flap bending, and torsion deflections. The influence of key structural modeling issues on the aeroelastic stability behavior of helicopter blades is studied. The issues include the shell wall thickness, elastic couplings and the correct treatment of constitutive assumptions in the section wall of the blade. It is found that the structural modeling effects are largely dependent on the layup geometries adopted in the section of the blade and these affect on the stability behavior in a large scale.

• Journal of Korean Library and Information Science Society
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• v.34 no.3
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• pp.125-145
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• 2003

The core version of UDC(Universal Decimal Classification) is available in an electronic form called MRF(Master Reference File) which supports the maintenance of the quality of the scheme as a working tool for the UDCC(UDC Consortium) by annual reviewing its content and initiating revisions and extensions. In this paper, we discuss outcomes of our in-depth analysis of the geography, biography and history disciplines in UDC focused on the its evolutions and characteristics, including the common auxiliaries of place, the common auxiliaries of time and the common auxiliaries of race, ethnic grouping and nationality. Based on the in-depth analysis, we suggested some ideas which can be applied into the history class of KDC(Korean Decimal Classification). In particular, its principle of combination methods in the history of individual regions, the way of its assignment of physical geography and human geography in the same division, the possibilities of the extension of the table of geographical division and the adaptation of the table of chronological division in KDC.

• Proceedings of KOSOMES biannual meeting
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• 2006.05a
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• pp.59-64
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• 2006

In this study, the risk of SRRs was assessed upon the scale of the damage of marine accidents. For the risk assessment, inner-outer dependence methods and special knowledge-based fuzzy logic were introduced. Also, in order to calculate the importance of assessment value in this study, a max min composition method was used for fuzzy logic based on the principle of fuzzy extension and the centroid of gravity method was used for non-fuzzy formation. In order to produce the importance of assessment items, the inner-outer dependence methods were used for assessment items, and markov analysis method was used for the importance of the final comprehensive assessment. As a result, the risk of SRR of Tongyoung and Yeosu was proven relatively higher, thus, it needs to have more rescue ships and rescue devices for relieving the risk in the future.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.12 no.20
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• pp.123-138
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• 1989

The primary objective of the agency research in the game theory lives in the maintenance of Pareto is optimal condition for the optimal incentive contract. The basic concepts which are related to this objective are reviewed in connection with the general assumptions to model it, the moral hazard and adverse selection which arised from the information asymmetry, and finally the problem of risk distribution. The demand for auditing and the role of auditor have been addressed by ASOBAC. Issues which an auditor is explicitly introduced in a principal-agent framework have been addressed in this paper. These issues must be confronted to appropriately with the auditor, and to achieve an adequate understanding of optimal confronting arrangement with the auditor. The first step in introducing an auditor into this analysis is to examine the game-theoretic foundation of such a expended agency model. The Mathematical program formulated may not yield solution that are resonable. This arises because the program may call for the auditor and manager to play dominated Nash equilibra in some subgame. The nontrivial natures of the subgame implies that randomized strategies by the auditor and manager nay be of crucial importance. The possibilities for overcoming the randomized strategy problem were suggested; change the rule of the game and or impose covexity condition. The former seems unjustifiable in on auditing context, and the latter promising but difficult to achieve. The discussion ended with an extension of the revelation principle to the owner manager-auditor game, assuming strategies. An examination of the restriction and improvement direction of the basic concept of agency theory was addressed in the later part of this paper. Many important aspects of auditor incentives are inherently multiple-agent, multiple-period, multiple-objectine, phenomena and require further analyses and researches.

• Korean journal of communication and information
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• v.50
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• pp.29-49
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• 2010

Various opinions are expressed about the Internet Regulation. Some people argue that it is impossible to control because of the technical characteristics of Internet, while other people argue that it is easy to control. Recently in Korea, a move to reinforce the Internet Regulation through the extension of cyber real-name system is emerging, whereas the concern for its excessive infringement of the Freedom of Expression is increasing. This paper was intended to draw a reasonable direction for Internet Regulation in our society. And accordingly this paper tried to suggest a desirable direction of Internet Control in the future and to draw a criterion for domestic court judgement by analyzing cases of cyber defamation so far. The result of this study proposed that the Freedom for Expression be widely secured in the case of cyber defamation of criticism and political comments upon public officials and that the legitimacy and effectiveness of Internet Regulation be ensured. This result of study is expected to help establish the direction and principle of Internet Regulation in the future around Korea Communications Commission and Korea Communications Standards Commission.

• Computers and Concrete
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• v.2 no.4
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• pp.325-343
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• 2005

Chloride ingress is a common cause of deterioration of reinforced concrete located in coastal zone. Modeling the chloride ingress is an important basis for designing reinforced concrete structures and for assessing the reliability of an existing structure. The modeling is also needed for predicting the deterioration of a reinforced structure. The existing deterministic solution for prediction model of corrosion initiation cannot reflect uncertainties which input variables have. This paper presents an approach to the fuzzy arithmetic based modeling of the chloride-induced corrosion of reinforcement in concrete structures that takes into account the uncertainties in the physical models of chloride penetration into concrete and corrosion of steel reinforcement, as well as the uncertainties in the governing parameters, including concrete diffusivity, concrete cover depth, surface chloride concentration and critical chloride level for corrosion initiation. There are a lot of prediction model for predicting the time of reinforcement corrosion of structures exposed to chloride-induced corrosion environment. In this work, RILEM model formula and Crank's solution of Fick's second law of diffusion is used. The parameters of the models are regarded as fuzzy numbers with proper membership function adapted to statistical data of the governing parameters instead of random variables of probabilistic modeling of Monte Carlo Simulation and the fuzziness of the time to corrosion initiation is determined by the fuzzy arithmetic of interval arithmetic and extension principle. An analysis is implemented by comparing deterministic calculation with fuzzy arithmetic for above two prediction models.

• The Korean Society of Law and Medicine
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• v.14 no.1
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• pp.209-236
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• 2013

The concept of expectation rights considers 'the expectation' that the patient should be given proper medical treatment as the benefit and protection of the law, so it would be the benefit and protection of the law due to personal rights different from 'the legal principle that has the possibility to a considerable extent' being in an extension of life and body. However, the problem how the patient's expectation of medical service sets up in order to make it the benefit and protection of the law would be still left in the vague concept of the patient's 'expectation', thus, in the first place, the medical practice following formed medical standard in every particular medical institutes should be the standard because these medical services are normally within a range of the patients' expectations. In addition, it should be naturally constituted as mental profit to get the subjective circumstances such as 'the patient's expectation' to be an object, and also, different from the profit and protection of the law such as life and body that should be absolutely protected, the origin of violation behavior should be regarded simultaneously to define the denotation of expectation rights. Therefore, the expectation rights violations would be problematic in case it fails to reach the medical standard that is expected for common doctors to practice properly. This is the concept of expectation rights that gets subjective matters such as the patient's expectation to be objectivity as medical practices that can be expected by generalized abstract doctors. This standard should be defined as the minimum standard that is naturally expected for doctors to practice, different from medical standard that decides the level of doctors.

• Journal of the Korean Society of Costume
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• v.54 no.6
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• pp.101-117
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• 2004

Opposed to following the contours of the human body, the voluminous enlargement in costume, which characterizes the distinguished enlargement in space rather than the contour of human body, mean the enlargement aspect involving the vertical protrusion and the expansion of shape and volume as well as the extension of length. The costume enlargement as a different method of expression is a symbol showing a meaning of something and an aesthetic expression containing man's will. This voluminous enlargement of costume, as an aesthetic expression, has different formative characteristicsand immanent meanings according to ideals and thoughts as well as social and cultural background of each age Accordingly, the aesthetic consciousness also differaccording to the change of the times. To study the aesthetic consciousness of costume's voluminous enlargement, focous had been given to milieus that show comparatively conspicuous voluminous enlargement Periods that have been subjected to this study include costumes of the ancient Egypt, the Gothic period in the Middle age, the Renaissance, the Baroque Rococo of the recent times, and the modern era (Empire, Romantic, Art Nouveau. etc) With focus given to the principle of design obtained through this study were used to analyze the aesthetic characteristics, Futhermore, based on the spirit of the times and the socio-cultural symbolism, research on immanent meanings, as supported by objectivity and universal validity, was also made, the enlargement beauty of costume had been placed under the aesthetic category and, by interpreting the analogies of presented in aesthetic consciousness, the true nature of the voluminous enlargement in costume had been traced. To Conclude, the aesthetic consciousness of the voluminous enlargement of the costumes in history was found to have following characteristics: (l) Metaphorical (2) Unlooked-for irregularity (3) feeling of satisfaction driven by self-enlargement (4) Dignified sublimity (5) Symbol of wealth and class (6) Ceremonial dignity (7) Tradition of the nobility (8) Aesthetic ornament (9) Ideal contour of the body

• Journal of the Society of Naval Architects of Korea
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• v.29 no.1
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• pp.103-112
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• 1992

The ultimate bending moment of ships is one of the principle strength considered in ship design. Several methods have been proposed to predict the ultimate bending moment and its major part is, in general, predicting the ultimate compressive strength of stiffened panels. In this paper, made is the review on the methods and formulae of predicting the ultimate compressive strength and they are applied to predicting the ultimate bending moment. Safely levels of three bulk carriers have been derived evaluated for two loading conditions, stray, light ship condition and full load condition, and wave bending by Classification Society Rule(ABS, DnV and Lloyd Rule). The present reliability analysis problem is strictly non-linear and the Advanced First-Order Reliability Method has been used. From the results of parametric studies, the methods of predicting the ultimate compressive strength of stiffened panels are compared from the view point of their applicability to the reliability assessment of ships structures. The paper ends wish a brief discussion drawn from the parametric studies and the extension of the study is described.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.38 no.6
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• pp.420-435
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• 2001

As multimedia technology has rapidly grown recently, many researches to process multimedia data efficiently using general-purpose processors have been studied. In this paper, we proposed multimedia instructions which can process multimedia data effectively, and suggested a processor architecture for those instructions. The processor was described with Verilog-HDL in the behavioral level and simulated with CADENCE$^{TM}$ tool. Proposed multimedia instructions are total 48 instructions which can be classified into 7 groups. Multimedia data have 64-bit format and are processed as parallel subwords of 8-bit 8 bytes, 16-bit 4 half words or 32-bit 2 words. Modeled processor is developed based on the Integer Unit of SPARC V.9. It has five-stage pipeline RISC architecture with Harvard principle.e.