• Journal of Korean Society of Steel Construction
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• v.21 no.4
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• pp.375-384
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• 2009

The application of the diagrid structural system has increased of late, but cyclic loadings such as winds and earthquakes cannot be fully understood through only an analytical study due to the difficulty of considering its welding property. In this study, diagrid nodes that had been scaled down to 1/5 of their full sizes were tested to find out their structural behavior under seismic or wind loads. Four specimens were used with five parameters, including the welding method and the design details. Cyclic loading tests were carried out, where a tensile load was applied to one brace member and a compression load to the other. The major failure modes in the tests were only failure of bending with tensile stress and tension failure. The welding method and the design details had no effect on the initial stiffness and yielding stress but play a significant role in the failure mode and energy dissipation, respectively.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.34 no.5
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• pp.337-342
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• 2012

The osseous or osteocutaneous free fibula flap has become the gold standard for most mandibular reconstructions because of its favorable osseous characteristics. However, disadvantages, such as the time-consuming reconstructive step, difficulty in performing the osteotomies to precisely recreate the shape of the missing segment of mandible and poor bone-to-bone contact play a role in making the surgeons look for alternative flaps. With the advent of computerized design software, which accurately plans complex 3-dimensional reconstructions, has become a process that is more efficient and precise. However, the ability to transfer the computerized plan into the surgical field with stereolithographic models and guides has been a significant development in advancing reconstruction in the maxillofacial regions. The ability to "pre-plan" the case, mirror and superimpose natural structures into diseased and deformed areas, as well as the ability to reproduce these plans with good surgical precision has decreased overall operative time, and has helped facilitate functional and esthetic reconstruction. We describe a complex case treated with this technique, showing the power and elegance of computer assisted maxillofacial reconstruction from the University of Michigan, Oral and Maxillofacial Surgery.

• Convergence Security Journal
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• v.6 no.4
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• pp.161-169
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• 2006

According to the development of information system, many information system and application soft-ware are develop. However, cyber attack and incident have more increased to the development of them. To defend from cyber attack and incident, many organizations has run information security systems, such as Intrusion Detection System, Firewall, VPN etc, and employed information Security person till now But they have many difficulty in operating these information security component because of the lack of organizational management and analysis of each role. In this paper, We propose the formal Cause-Effect Model related with the information security system and administrative mission per each security. In this model, we regard information system and information system operator as one information component. It is possible to compose the most suitable information component, such as information system, human resource etc., according to the analysis of Cause-Effect Model in this paper. These analysis and approaching methodology can make effective operation of each limited resource in organization and effective defense mechanism against many malicious cyber attack and incident.

• Child Health Nursing Research
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• v.4 no.2
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• pp.255-264
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• 1998

Disease prevention and health promotions are basically needed to be healthy, health education is the most useful mean to accomplish them. Preschool children are being developped, their health problem can effect their health status through their lives. This study was attempted to survey for status of health education of kindergarten for preshoolers and to provide the basic precious data for nursing intervention. The subjects were 51 kidergarten teachers. The data were collected by the questionaires, which consiste of 25 items concerning daily life habits of children and 1 item concerning the problems of health education for preschoolers. The data were analyzed by SAS program. The results of this study are as folleowed ; 1. The most frequently educated subjects were 'adequate and safe play' and 'hand washing', 'walking and running straightly', 'oral hygiene or tooth brushing', 'walking staires'. 2. The most frequently used teaching method was the explaining. 3. The most frequently used instructional method was the pictures. The slide films and OHP was seldomly used media. 4. The most effective teaching method which perceived by the kindergarten teachers was role play . Discuss ion and compensation/reinforcement were comparatively effective method also. 5. The most effective instructional media which perceived by the kindergarten teachers was a real object/model. 6. The problems of health education for preschoolers were 'deficiency of developped health educational programs' and 'inconsistency between parents' education and kindergarten teachers' education', 'deficiency of instructional media'. The other problems were' the knowledge deficit of teachers themselves' and 'the difficulty of measure the effect of education', 'time deficit'. Conclusionally, we have to realize the health of children is the future of our health, and reinforce the health education for preschoolers to accomplish the disease prevention and health promotion.

• Korean Journal of Social Welfare
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• v.65 no.2
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• pp.155-177
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• 2013

The aim of this study was to explore and understand the communication experiences of the deaf, from their perspective. This study obtained informations through in-depth interviews with five people with deafness using sign language. The collected data was analyzed according to Giorgi's phenomenological qualitative methods. The following main themes were extracted from the practical experiences of the participants interviewed: 'being confined in the world without sound by themselves', 'learning and comprehending how to communicate', and 'looking for identity as a membership of the deaf community'. Sign language was a tool and mediator so that they could come out of their comfort zone, communicate with people, and connect to others in the deaf community. However, on the other hand, sign language had a contradictory role that restricted their activities to the deaf societies that could understand each other using sign language. As a result of this study, we can be cognizant of how much not hearing and speaking(hearing disability) is a difficulty for human beings. The implication of this study's results on policy making and actual practices are discussed focusing on the rights and well-being of the deaf.

• The Journal of the Convergence on Culture Technology
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• v.6 no.3
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• pp.211-216
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• 2020

The purpose of this study is to discover about the parenting anxiety of working mother and full-time mother with elementary school children, and to find ways to support them. All the study participants were 20 mothers with elementary school children. Data was collected from June 23, 2017 to July 8, 2017. Data was collected using in-depth group interviews. Parenting anxiety felt by working mothers is 'sorry about the child', 'burden on the role of parents', and 'difficulty in caring', 'Reemployment and career disconnection'. The conclusion is as follows. First, it is necessary to reduce the burden of raising children on elementary school children of both working and full-time mothers. Second, practical support plans are needed for working mothers and full-time mothers of elementary school children. Third, practical support plans are needed for working mothers and full-time mothers with elementary school children.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.39 no.1
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• pp.9-16
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• 2016

The project schedule risk in the engineering and facility construction industry is increasingly considered as important management factor because the risks in terms of schedule or deadline may significantly affect the project cost. Especially, the project-based operating companies attempt to find the best estimate of the project completion time for use at their proposals, and therefore, usually have much interest in accurate estimation of the duration of the projects. In general, the management of projects schedule risk is achieved by modeling project schedule with PERT/CPM techniques, and then performing risk assessment with simulation such as Monte-Carlo simulation method. However, since these approaches require the accumulated executional data, which are not usually available in project-based operating company, and, further, they cannot reflect various schedule constraints, which usually are met during the project execution, the project managers have difficulty in preparing for the project risks in advance of their occurrence in the project execution. As these constraints may affect time and cost which role as the crucial evaluation factors to the quality of the project result, they must be identified and described in advance of their occurrence in the project management. This paper proposes a Bayesian Net based methodology for estimating project schedule risk by identifying and enforcing the project risks and its response plan which may occur in storage tank engineering and construction project environment. First, we translated the schedule network with the project risks and its response plan into Bayesian Net. Second, we analyzed the integrated Bayesian Net and suggested an estimate of project schedule risk with simulation approach. Finally, we applied our approach to a storage tank construction project to validate its feasibility.

• Health Policy and Management
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• v.20 no.2
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• pp.69-88
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• 2010

The effective administration of hospital with innovation and human resource practices is a matter of grave concern because hospitals are becoming bigger and more specialized. Biomedical engineers who manage medical machineries and tools used to deliver healthcare services in a hospital setting play an important role in providing customers good quality services. Maintaining job satisfaction of biomedical engineers is, thus, important in the delivery of quality care. This is a descriptive cross-sectional study aiming to determine factors affecting job satisfaction of biomedical engineers working in general hospitals. The study population consisted of biomedical engineers at 79 general hospitals of 26 regions based on the registry of the Korea Medical Engineering Association (KMEA). The data were collected using a self-administerd questionnaire between May and July of 2009. Job satisfaction was assessed with 19 items covering 3 dimensions of work-external, work-internal, and organizational aspects (Cronbach's ${\alpha}=0.884$), resulting in an average summary score. Statistical analysis was conducted with SPSS for Windows version 15.0. The mean score of job satisfaction was 3.50 (${\pm}0.04$). There were statistically significant differences in job satisfaction according to age, health status, job position, duration of work as a biomedical engineer, years in the current workplace, difficulty at work, intent to change job, and the amount of support from superiors and colleagues. In multiple regression analysis, the factors affecting job satisfaction of biomedical engineers were salary, health status, and support of superiors and colleagues ($r^2=0.512$). Effective motivation-plans, taking into account organizational characteristics and the working environment of the hospital, may help to improve the job satisfaction of biomedical engineers.

• Journal of Hospice and Palliative Care
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• v.13 no.2
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• pp.76-80
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• 2010

Purpose: As a part of analysis of home-based cancer patients management of public health centers, regional cancer center, and hospice institution in Jeju, this study was undertaken to establish their role. Methods: We investigated current status of hospice palliative care, especially home-based cancer patients management and summary demand of public health centers. Results: Services provided through the home-based cancer patients management project included physical, emotional, spiritual and education/informative services, even though there was little difference between them. The result showed that in the view of patients there was little relationship between public health centers, regional cancer center and hospice palliative institution. Conclusion: The relationship between home-based cancer patients management and institutions should be reinforced. Patients in acute state and difficulty care of patients should be referred to regional cancer center whereas maintenance state of patients should be referred to public health center.

• School Mathematics
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• v.13 no.3
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• pp.363-384
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• 2011

This study is based on the recognition that the school mathematics education should reinforce the heuristic and constructional aspects related with discoveries of mathematical rules and understanding of mathematical concepts from real world situations as well as the deductive and formal aspects emphasizing on mathematical contents precisely. The 11th grade students of one class from a city high school with average were chosen. They were given time to learn various functions of Excel in regular classes of "Information Society and Computer" subject. They don't have difficulty using cells, mathematical functions and statistical functions in spreadsheet. Experiment was performed for six weeks and there were two hours of classes in a week. Considering the results of this research, teaching materials using spreadsheets play an important role in helping students to experience probabilistic and statistical reasoning and construct mathematical thinking. This implies that teaching materials using spreadsheet provide students with an opportunity to interact with probabilistic and statistical situations by adopting engineering which can encourage students to observe and experience various aspects of real world in authentic situations.