• International Journal of Fuzzy Logic and Intelligent Systems
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• v.11 no.3
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• pp.165-170
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• 2011

Due to advances in hardware performance, user-friendly interfaces are becoming one of the major concerns in information systems. Linguistic conversation is a very natural way of human communications. Fuzzy techniques have been employed to liaison the discrepancy between the qualitative linguistic terms and quantitative computerized data. This paper deals with linguistic queries using clustering results on data sets, which are intended to retrieve the close clusters or distant clusters from the clustering results. In order to support such queries, a fuzzy technique-based method is proposed. The method introduces distance membership functions, namely, close and distant membership functions which transform the metric distance between two objects into the degree of closeness or farness, respectively. In order to measure the degree of closeness or farness between two clusters, both cluster closeness measure and cluster farness measure which incorporate distance membership function and cluster memberships are considered. For the flexibility of clustering, fuzzy clusters are assumed to be formed. This allows us to linguistically query close or distant clusters by constructing fuzzy relation based on the measures.

• Korean Journal of Social Welfare
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• v.62 no.2
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• pp.235-255
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• 2010

The successful practicum should be based on the systematic supervision and the supervision will be provided by the cooperation and liason between school and field. This study intended to explore the perception of faculty field liasons about the contents of supervision. As a result of using the Q methodology, the percetion on supervison was categorized into three types : "focusing on attitude and mind of social worker", "focusing on knowledge and self-awareness" and "focusing on practice skills for intervention". According to these results, discussions and implications for social work education and practice were suggested.

• Journal of the Korean Society for Precision Engineering
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• v.33 no.6
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• pp.499-508
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• 2016

This paper describes a study of performance prediction of an electric propulsion system for multirotor UAVs. The electric propulsion system consists of motors, propellers, batteries and speed controllers, and significantly affects performance characteristics of the platform. The performance of the electric propulsion system for multirotor UAVs was predicted using an analytical model derived from the characteristics of each component, operation experiments and statistical analyses. Ground performance tests and endurance flights were performed to verify the reliability of the proposed performance prediction method. A quadrotor platform was designed to demonstrate the parcel delivery service used in the endurance flight. From the result of verification tests, it was confirmed that the proposed method has a good agreement.

• Korean Journal of Psychosomatic Medicine
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• v.6 no.2
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• pp.176-187
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• 1998

This study was performed to identify the significant variables affecting Follow-up after psychiatric consultation in General medical units and the trends of psychiatric consultation at the Hallym University hospital in Chunchon. Subjects of this study were 107 patients from April 1, 1998 to August 31, 1998, who were referred for psychiatric consultation during hospitalization. The results were as follows ; 1) Referral rate of General medical units was 7.5% and ordered Gastroenterology, Cardiology, nephrology, Other part. 2) The rate of total follow-up was 58% and the rate of No-follow-up was 42%. 3) In the cases of referral timing over admission 8th days, the days hospitalized after consultation performed were lengthened, significantly. 4) Common reasons for no follow-up of consultation were 'early- discharge' and 'patient's unwillingness to psychiatric reconsult. 5) Significant variables affecting follow-up were 'treatment recommendation', 'concordance with psychiatric drug recommendation', 'concordance with laboratory recommendation', 'total days hospitalized', 'Days hospitalization after consult was performed' and 'referral reason'.

• Korean Journal of Psychosomatic Medicine
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• v.7 no.2
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• pp.252-255
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• 1999

Numbers of patients who have chronic pain seem to be increasing even in the psychiatric practice. One report in Korea showed more than 40% of psychiatric patients who visited out-patient clinic were suffered from chronic pain and one third of those patients were needed treatment for the on-going pain. For evaluating and treating those patients the charateristics of illness behavior should be understood. Abnormal Illness behavior was found as one of the most influential factors which led symptoms complicated and chronified. This symposium was planned to illustrate how to manage the patients whose pain are associated with arthropathy and connective tissue diseases, neuropathic pain and headache more effectively and efficiently. So, It is hoped to get fruitful knowledges for the management of chronic pain in the scope of consultation-liaison psychiatry.

• Journal of Pharmaceutical Investigation
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• v.32 no.4
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• pp.331-337
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• 2002

Nonproprietary name may be used without restriction by the public at large and can be called common name, generic name. Nomenclature agencies exist in US, Great Britain, Japan and so on. The agencies maintain liaison with onε another in an effort to secure the wide adoption of thε most appropriate and universally acceptable designation for each drug. To prevent the confusion which arises when several nonproprietary names are used for a single drug, either in the same country or in several different countries, the WHO has assumed the responsibility of coordination existing nomenclature at the international level. In this study, the nomenclature for new drugs and the terminology to harmonize specifications for revision of Korean Pharmacopoeia (KP) were established.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.7
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• pp.7-15
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• 2008

A single active capacitor snubber-assisted soft-switching sinewave pulse modulation utility-interactive power conditioner with a three-winding flyback high frequency transformer link and a bidirectional active power switch in its secondary side has been proposed. With the aid of the switched-capacitor quasi-resonant snubber cell, the high frequency switching devices in the primary side of the proposed DC-to-AC sinewave power inverter can be turned-off with ZVS commutation. In addition to this, the proposed power conditioner in the DCM can effectively take the advantages of ZCS turn-on commutation. Its output port is connected directly to the utility AC power source grid. At the end, the prototype of the proposed HF-UPC is built and tested in experiment. Its power conversion conditioning and processing circuit with a high frequency flyback transformer link is verified and the output sinewave current is qualified in accordance with the power quality guidelines of the utility AC interactive power systems.

• Transactions of Materials Processing
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• v.22 no.3
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• pp.150-157
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• 2013

Fiber metal laminates (FMLs) are layered materials comprised of thin metal sheets and fiber reinforced plastic (FRP). This paper presents the numerical study of the formability enhancement of FMLs composed of an aluminum alloy and self-reinforced polypropylene (SRPP) composite. In this study, a numerical simulation based on finite element (FE) modeling is proposed to evaluate the formability of FMLs using ABAQUS/Explicit. The FE model, which included a single layer of solid and shell elements to model the blank, used discrete layers of the solid element with a contact model and shell elements with a friction based model for the aluminum alloy-composite interface conditions. This method allowed the description of each layer of FMLs and was able to simulate the interaction between the layers. It is noted through this research that the proposed numerical simulation described properly the formability enhancement of the FMLs and the simulation results showed good agreement with experimental results.

• Transactions of Materials Processing
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• v.22 no.2
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• pp.86-92
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• 2013

When stamping ultra-high-strength steel (UHSS), the phenomenon of galling, which corresponds to a transfer of material from the sheet to the tool surface, occurs because of the high contact pressure between tool and workpiece. Galling leads to increased friction, unstable interface conditions, scratches on the sheet and the tool surfaces and, eventually, premature tool surface failures. Therefore, a simple and accurate evaluation method for tool scratching is necessary for the selection of tool material and coating, as well as for a better optimization of process conditions such as blank holder force and die radius. In this study, the pin-on-disc (PODT) and pin-on-flat surface (POFST) tests are conducted to quantitatively evaluate scratch-related tool life for stamping of UHSS. The variation of the friction coefficient is used as an indicator of scratch resulted from galling. The U-channel ironing test (UCIT) is performed in order to validate the results of the friction tests. This study shows that the POFST test provides a good quantitative estimation of tool life based on the occurrence of scratch.

• Korea Journal of Hospital Management
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• v.13 no.4
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• pp.101-118
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• 2008

Japanese national health expenditure was 8.0% of GDP in 2004, and it was lower than average of OECD countries. But it has increased rapidly in recent years. Japan has relatively many acute care beds and high-price medical equipments, and the average length of stay is long. Japanese government is trying healthcare reform to contain healthcare expenditure, increase the efficiency of management and improve the quality of healthcare. As healthcare policies for hospitals such as DPC (Diagnosis Procedure Combination) for acute care beds, reduction of long-term care beds, and functional differentiation and liaison among healthcare institutions are implemented, the number of hospitals in financial difficulties is increasing. The serious situation urges hospitals to adapt to changes and search new directions of management. They need to establish and implement appropriate positioning strategy, and increase management efficiencies. Korean healthcare system has similarities with Japanese in many aspects. The recent reform and changes in Japanese healthcare system and hospitals give suggestions to Korean hospitals as to how they can prepare for environmental changes and improve management.