• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2009.10a
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• pp.359-362
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• 2009

Optimal efficiency control of synchronous reluctance motor(SynRM) is very important in the sense of energy saving and conservation of natural environment because the efficiency of the SynRM is generally lower than that of other types of AC motors. This paper is proposed a novel efficiency optimization control of SynRM considering iron loss using multi adaptive fuzzy learning controller(AFLC). The optimal current ratio between torque current and exciting current is analytically derived to drive SynRM at maximum efficiency. This paper is proposed an efficiency optimization control for the SynRM which minimizes the copper and iron losses. There exists a variety of combinations of d and q-axis current which provide a specific motor torque. The objective of the efficiency optimization control is to seek a combination of d and q-axis current components, which provides minimum losses at a certain operating point in steady state. The control performance of the proposed controller is evaluated by analysis for various operating conditions. Analysis results are presented to show the validity of the proposed algorithm.

• Journal of the Korean Society of Clothing and Textiles
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• v.25 no.1
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• pp.50-60
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• 2001

This study is to clarify the concept of \"Americanization\" among korean modern clothing culture by investigating magazines from 1920s to 1930s. The Americanization of modern clothing culture can be divided to New fashion, Sports-wear, and Cloth improvement. 1. New fashion, Western culture was the main stream of new fashion, and modern boys and girls could bear cultural privileged consciousness. And the spread of modern culture was so fast that exaggerated fashional preference provoked extravagancy and loss of individuality. 2. Sports-wear. Under the rule of Japanese imperialism, initial sports activity was encouraged to regulate colony by principle and order. Through the sports-wear, practicality of clothing, exposure of female body, and the concept of T.P.O.(Time, place, occasion) were introduced. 3. Cloth improvement. The capitalism and modern concept of \"time\" were introduced and promoted maximum productivity. And to increase productivity, imperialist educated conveniency of western clothes and inconveniency of traditional Korean clothes. These could affect Koreans to think themselves a sense of inferiority(uncivilized complex).ncivilized complex).

• Journal of Communications and Networks
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• v.6 no.1
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• pp.68-77
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• 2004

In the near future packet networks should support applications which can not predict their traffic requirements in advance, but still have tight quality of service requirements, e.g., guaranteed bandwidth, jitter, and packet loss. These dynamic characteristics mean that the sources can be made to modify their data transfer rates according to network conditions. Depending on the customer&; needs, network operator can differentiate incoming connections and handle those in the buffers and the interfaces in different ways. In this paper, dynamic QoS-aware scheduling algorithm is presented and investigated in the single node case. The purpose of the algorithm is in addition to fair resource sharing to different types of traffic classes with different priorities ?to maximize revenue of the service provider. It is derived from the linear type of revenue target function, and closed form globally optimal formula is presented. The method is computationally inexpensive, while still producing maximal revenue. Due to the simplicity of the algorithm, it can operate in the highly nonstationary environments. In addition, it is nonparametric and deterministic in the sense that it uses only the information about the number of users and their traffic classes, not about call density functions or duration distributions. Also, Call Admission Control (CAC) mechanism is used by hypothesis testing.

• Journal of the Korean Society of Systems Engineering
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• v.17 no.1
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• pp.53-64
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• 2021

Wargame is a simulated military operation with certain rules, specifications, and procedures, in which soldiers can virtually and indirectly experience the war. The ROK Navy operates the Cheonghae model, a training wargame model for helping commanders and staff master the procedures for conducting the war. It is important for commanders, staff and analysts to know whether a warship can perform its missions and how long it can last during a war. In existing model, the Cheonghae, the probability of kill of a warship is calculated simply considering the number of tonnage without any stochastic elements, and the warship's mission availability is also determined based on predetermined values. With this model, it is difficult to get a value of the probability of kill that makes sense. In this dissertation, the author has developed a probabilistic model in which the warship vulnerability data of ROK-JMEM can be used. A conceptual model and methodology that can evaluate the mission performance of personnel, equipment, and supplies has been proposed. This can be expanded to a comprehensive assessment of wartime warship loss rates by integrating damage rates for personnel, equipment, and supplies in wartime.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.32 no.1
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• pp.3-9
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• 2021

Objectives: It is hard to accumulate research data on adolescents' suicide, because friends and family of the suicide completers might be reluctant to share the experience. To overcome the lack of information on adolescent suicide victims, the authors examined the risk and protective factors for adolescents' suicide from a character in a novel. Methods: Krystal, an adolescent female in the novel The Casual Vacancy by Joanne Rowling, failed to overcome her unfortunate circumstances and committed suicide. The authors analysed Krystal's case based on the guideline for patients with suicidal behaviours to address the complicated situation of her death. Results: Krystal grew up in a poor and dangerous environment. Despite the environmental hardships, she developed ego maturation with affectionate help from Mr Fairbrother, an assistant coach of the Girls' Rowing Team and a parish councillor. The sudden passing away of Mr Fairbrother brought on a crisis of identity for Krystal. In addition, a villainous character raped her and her brother drowned to death, which brought her great sorrow. She felt helpless and committed suicide. Conclusion: In spite of many risk factors for suicide, Krystal was able to keep her life with a few protective factors, a younger brother in the home, and a sense of responsibility for the family. After the loss of her brother, however, she collapsed in a moment. Krystal's suicide might not only be a personal choice but a breakdown of the social protection system for the youth.

• Journal of The Korean Society of Integrative Medicine
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• v.8 no.4
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• pp.19-27
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• 2020

Purpose : We aimed to investigate the effect of cranio-cervical flexion exercises(CCFE) with visual feedback(VF) on the muscle activity of the upper trapezius in forward head posture (FHP) and whether deficits in proprioception affect the changes in muscle activity. Methods : Twenty subjects with FHP were assigned to one of 2 groups according to deficits in proprioception. The muscle activity of the upper trapezius during arm movement under three exercise conditions (resting, CCFE, and VF + CCFE). Repeated-measures analysis of variance was used to compare differences in muscle activity according to the exercise conditions between the groups and to analyze the interactions between groups and conditions. Results : Significant differences were observed in muscle activity according to the exercise condition (p<.05), with no significant differences between the groups. The muscle activity of the upper trapezius was significantly different between the resting and VF +CCFE conditions (p<.05), with no significant difference between the resting and CCFE conditions (p>.05). Conclusion : The results of this study showed that the CCFE combined with VF are an effective intervention for FHP to train deep muscles selectively. In addition, the loss of proprioceptive sensation is not related to changes in muscle activity during exercises.

• Journal of the Korean Society of Costume
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• v.61 no.5
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• pp.34-47
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• 2011

Grotesque make-up causes a visual shock among modern people beyond the standardized beauty definition, attracts their attention, and manifests itself as a phenomenon of "something bizarre, extremely unnatural, ugly, and funny." The purposes of this study were to investigate the characteristics of grotesque in today's make-up as well as its concepts and features and to figure out its aesthetic characteristics based on the results. The research scope was limited to the fashion make-up of the collections from 2005 to 2010 and the advertising make-up during the same period. In the make-up phenomenon examined according to the grotesque characteristics, the pale skin expression, frightened eyes, and emphasis on black induce disgusting fear, sadness, death, sin, fear for life and death, and obsession. As the make-up emphasized only one part by neglecting the original form and exaggerated it to the point of distortion, the exaggerated abnormality led to a sense of social crisis, desperation, and absence of form. As for devilish playfulness, the make-up accompanied by grotesqueness and humor brought the suppressed, closed world in a tight framework out to fluidity and openness, conveying satire, ludicrousness, ridicule, and accusation of the modern society. The heterogeneous disharmony was found in the use of objects in heterogeneous combinations, presenting unreality, fiction, displeasure, ambivalence, and loss of value of human existence.

• Journal of the Korean Society of Marine Environment & Safety
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• v.22 no.3
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• pp.259-267
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• 2016

The study performs a risk analysis on container ship accidents using accident data collected over the six years from 2006 to 2011, presents the resulting risk level, and suggests three risk mitigation measures to reduce the overall risk, for the safer operation of container ships. More specifically, starting from the initial accident of collision, we developed 13 different accident scenarios using event tree analysis based on which the overall risk level was obtained and presented as a FN curve. Since diverse human factors are the main cause of most of the ship accidents, our study focuses on the effect of reducing human causes on the resulting risk level. For the research we considered the injuries for the calculation of fatality with the help of MAIS. The results show that collision was the main type of accident, accounting for 62 % of all accidents, and the measures employed were proven to be effective in the sense that the risk level was much lowered and the average number of fatalities was also reduced. With more data accumulated, more precise risk level will be calculated with which the practical risk mitigating measures will be also developed. For future study, economic loss and environmental damage as consequences need to be considered.

• Journal of the Korean Home Economics Association
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• v.40 no.7
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• pp.193-210
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• 2002

The purpose of this study is to identify the characteristics of physical setting of adult day care as a place for the elders and adult and to develop an basic understanding of the architectural program and physical setting for adult day care for the cognitively-impaired in the U.S.A. The data was collected from 13 Adult Day Care Centers(ADCC) from 2001 to 2002 by interview and the documents about those facilities. Physical environment should be viewed as an element in the care of individuals with dementia, and that the principles used to plan and design environment should be consistent with the principles used in providing other aspects of care. The results of the study provided the information about the best condition of physical setting of ADCC for the elderly with dementia. Memory Loss Adult Day Center and St. Ann Center for Intergenerational Care have better architectural program than other facilities. It is the hope of this study to provide guideline for design and care professionals with a first draft of a "sense-making" template and to slow own the progression of the disease by the appropriate physical environment.

• Journal of East-West Nursing Research
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• v.19 no.2
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• pp.88-95
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• 2013

Purpose: The purpose of this study was to examine nursing students' attitude toward death and perception on hospice care. Methods: The survey was performed on 103 nursing students in one university in Goseong-gun, Gangwon-do. The data were collected by questionnaires and analyzed using descriptive statistics. Results: Regarding the attitude toward death, 90.3% of the students had thought about death. They worried about sense of loss and sadness due to parting with family (31.1%). About half (51.5%) of the students considered death as a final process of the life. With regard to the perception of hospice, 92.2% of the students heard about hospice through books or nursing classes (65.0%). Public institutions running by government was considered to the students as the best hospice management institution (44.7%). The students thought a ideal model of hospice setting in Korea was hospital or institution specialized with hospice care (51.5%). They considered the barriers to effective hospice care in Korea was the lack of the public consensus on the need for hospice program (35.9%). The average perceptions about the purpose of hospice care was 4.33 whereas the average of the need of hospice care was 3.85. Conclusion: The findings of the study provide the basis for expanding nursing practice and education related to hospice care.