• Structural Engineering and Mechanics
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• v.85 no.1
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• pp.15-27
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• 2023

Using artificial intelligence and internet of things methods in engineering and industrial problems has become a widespread method in recent years. The low computational costs and high accuracy without the need to engage human resources in comparison to engineering demands are the main advantages of artificial intelligence. In the present paper, a deep neural network (DNN) with a specific method of optimization is utilize to predict fundamental natural frequency of a cylindrical structure. To provide data for training the DNN, a detailed numerical analysis is presented with the aid of functionally modified couple stress theory (FMCS) and first-order shear deformation theory (FSDT). The governing equations obtained using Hamilton's principle, are further solved engaging generalized differential quadrature method. The results of the numerical solution are utilized to train and test the DNN model. The results are validated at the first step and a comprehensive parametric results are presented thereafter. The results show the high accuracy of the DNN results and effects of different geometrical, modeling and material parameters in the natural frequencies of the structure.

• International Journal of Advanced Culture Technology
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• v.11 no.2
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• pp.44-48
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• 2023

To enhance safety in dangerous situations, it is essential to provide practice-oriented safety education. However, direct experiences can be limited, and thus, metaverse-based safety education is emerging as an alternative. In this study, we analyzed the first official metaverse safety education program of the Korea Ministry of Education, mainly focusing on its title, objectives, content, and results using the Revised PRISMA framework. The program concentrates on "life safety" for "fire safety," "disaster safety" for "earthquake safety," and "first aid" for "abrasions, burns, fractures, cardiopulmonary resuscitation, and the use of AED." We classified the objectives of the entire program and its three sub-programs, and identified the knowledge, main practice tasks, and their results. The aim of this study is to promote an understanding of the main cases of national-led metaverse safety education and infer the practical safety education contents emphasized to Korean school-age students.

• Restorative Dentistry and Endodontics
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• v.41 no.4
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• pp.322-331
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• 2016

Variation in the root and canal morphology of the maxillary first molars is quite common. The most common configuration is 3 roots and 3 or 4 canals. Nonetheless, other possibilities still exist. The presence of an additional palatal root is rather uncommon and has been reported to have an incidence of 0.06 - 1.6% in varying populations studied. Whenever two palatal roots exist, one of them is the normal palatal root, the other is a supernumerary structure which can be located either mesiolingually (radix mesiolingualis) or distolingually (radix distolingualis). This case report describes successful endodontic treatment of a maxillary first molar with radix mesiolingualis and radix distolingualis. Identification of this variation was done through clinical examination along with the aid of multiangled radiographs, and an accurate assessment of this morphology was made with the help of a cone-beam computed tomography imaging. In addition to the literature review, this article also discusses the epidemiology, classifications, morphometric features, guidelines for diagnosis, and endodontic management of a maxillary first molar with extra-palatal root.

• Restorative Dentistry and Endodontics
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• v.40 no.3
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• pp.241-248
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• 2015

Variation in root canal morphology, especially in maxillary first molar presents a constant challenge for a clinician in their detection and management. This case report describes the successful root canal treatment of a three rooted right maxillary first molar presenting with three canals each in the mesiobuccal and distobuccal roots and one canal in the palatal root. The clinical detection of this morphologic aberration was made using a dental operating microscope, and the canal configuration was established after correlating and computing the clinical, radiographic and cone-beam computed tomography (CBCT) scan findings. CBCT images confirmed the configuration of the canals in the mesiobuccal and distobuccal roots to be Al-Qudah and Awawdeh type (3-2) and type (3-2-1), respectively, whereas the palatal root had a Vertucci type I canal pattern. This report reaffirms the importance of careful examination of the floor of the pulp chamber with a dental operating microscope and the use of multiangled preoperative radiographs along with advanced diagnostic aids such as CBCT in identification and successful management of aberrant canal morphologies.

• Journal of the Korean Society of School Health
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• v.20 no.1
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• pp.45-52
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• 2007

Purpose: The purpose of this study was to examine the types of school accidents and their first aids at Elementary, Middle, High Schools in a local area. Methods: The subjects were 1062 students who have had episodes of school accidents from 730 (Elementary = 429, Middle = 188, High = 113) schools in Chungnam province from January to December, 2006. Data were collected from accident-related record from school nurse and 'School Safety Fund', and analyzed using the SPSS Version 13.0 programs and the results and conclusions are as follows: Results: The proportion of school accidents occurred were in middle(0.43%), high(0.35%), primary(0.30%) school students. And the most frequent type of accident was fracture and then sprain. Most school accidents broke out in playground during resting time, and followed by physical education class. The most frequent cause of school accidents was carelessness and first aid was fixation the injury. Conclusion: Based on these findings, school-based and continuous safety education programs and emergency care system within school and in community can be suggested in collaboration with health-related resources. Further longitudinal study to identify causes and kinds of school accidents and can also be recommended.

• Journal of the Korean Society of Costume
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• v.63 no.8
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• pp.14-26
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• 2013

The purpose of this study is to compare and analyze Jacqueline Kennedy and Michelle Obama's fashion style from a perspective of modernism and postmodernism. The method utilized in this study was first, to examine the properties of modernism and postmodernism. Next, we explored the types of role performance of the first ladies and the application of their fashion as an aid to their roles through the precedents of the research concerning modernism and postmodernism. The results of the study are as follows. First, there was a trend of formalism and anti-formalism. Jacqueline Kennedy made her public appearances wearing a formal dress in order to express the first lady's authoritarian figure of restrained elegance. The fashion of the first lady aspired to formalism. Meanwhile, Michelle Obama followed more of a free style by eschewing the typical formality of the first lady. She created diverse styles utilizing a variety of items, which were not interrupted by form or by using heterogeneous items. Second, there is a trend of elitism and populism. While Jacqueline Kennedy preferred only haute couture designers' costume in order to show the prestige and dignity of the upper class, Michelle Obama patronized unknown designers' clothing or mid-level casual brand goods that the public favors in order to interact with the public through her fashion. Third, while modernism regards totality or unity to be important, postmodernism puts an emphasis on the eclecticism by pursuing complexity and diversity through the deconstruction of an indigenous genre. In case of Jacqueline Kennedy, this tendency featured monotone clothing color, which presented a unified full set dress that excluded decoration. Michelle Obama, in contrast, mixed and matched formal dresses and a casual cardigan or felicitously mixed luxury brand or low to middle priced brand goods.

• Korean Journal of Occupational Health Nursing
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• v.20 no.2
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• pp.153-162
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• 2011

Purpose: The purpose of this study is to investigate the impact of job stress, self-efficacy and empowerment of 119 Emergency medical technicians in Jeollanam-do. Methods: This study used the data collected from 346 respondents working for first aid in a fire station. To answer research questions, this study employed frequency analysis, reliability test, F (t)-test, ANOVA, Scheffe' post-hoc test, and multiple-regression analysis. Results: In terms of demographic characteristics, marital status and age had significant impact on job stress, but sex and education did not. In terms of job characteristics, first placement, rank, and tenure made significant difference on job stress, whereas certificate, department, and area did not. These results address that general characteristics, self-efficacy and job stress are critical variables on empowerment. Conclusion: From the research findings, it is concluded that fire fighters' job stress can be reduced if professional development programs are given to them, which is likely to provide better public services such as first aids and welfare, as well as to increase job satisfaction.

• Journal of Family Resource Management and Policy Review
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• v.16 no.3
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• pp.67-82
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• 2012

The first local exchange trading system(LETS), established in Comox Valley in Canada, aimed at facilitating the regional economy. However, in Korea, LETS was adopted to encourage mutual aid and promote community spirit among residents. This study examines the feasibility of LETS as a revitalization initiative for Pumasi and suggests a number of policies that can be implemented to support the project. The findings are as follows: First, the LETS credit system was found to complement social capital initiatives among Pumasi participants in the early stages of the Pumasi project. Second, combining LETS and Pumasi initiatives was found to consolidate community spirit and encourage a cooperative way of life among participants due to the fact that LETS enlarges the scope of local residents' participation and diversifies the services being exchanged. A number of policy suggestions are made for combining LETS with Pumasi. First, the project must define a vision of its long-term purpose and outcomes. Second, local residents should be employed as assistants to facilitate the project. Third, Pumasi participants should ensure that childcare exchange services are of the highest quality by providing an educational program on parenting. Fourth, the project manager's employment conditions and working environments must be guaranteed.

• The Korean Journal of Emergency Medical Services
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• v.13 no.3
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• pp.121-131
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• 2009

The purpose of EMS is to provide emergency patients with prompt and suitable emergency treatments therefore it saves their lives and makes them recover fast to return to normal. The purpose of correctional administration is to return inmates to society as sound citizens after their service by providing various correctional education, reformational programs, vocational training and etc. In this way, the aim of correctional administration and EMS is like mutual agreement by their returning to society safely. Therefore this study makes some propositions like the followings for the safety between many inmates who can have physical injury and exposure to diseases caused by particularity of subculture within correctional institutions and the staffs who work for them. It is said about efficient pre-hospital EMS through various causes of emergency situation in the correctional institution, system, manpower, facility, equipments and problems and so on. 1. Recruit the first-rate EMT(emergency medical technician) as central role of pre-hospital EMS according to each correctional institution and working terms. 2. Equip specialized transference system with symptom of patients and purpose of transference. 3. Emergency medical equipments and first-aid medicines should be equipped for field and ambulance. 4. Educate correctional officers as first responders and inmates within correctional institutions about systematic emergency treatment.

• The Korean Journal of Emergency Medical Services
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• v.6 no.1
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• pp.169-184
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• 2002

The purpose of this study was to find out the 119 rescue and first aid's satisfaction level for their occupations, understand the influential factors of the satisfaction level and also analyze the level of each working districts. Therefore to provide basic information of policy decisions to increase the satisfaction level. Date were collected from 400 national the 119 rescue and first aids by questionnaire and using the tools, which has developed by Slavitt, from August 2 to September 30, 2002. The data were analyzed by percentage, mean t-test and ANOVA. Divided 39 items into 7 provinces to find out the satisfaction level of each province, follow as the influential factors of the satisfaction level. 1. The most of the 119 rescue and first aids were satisfying about their occupations as they got 3.02 marks out of 5, which is the full mark. 2. As the results after analyzed the relation ship between the satisfaction level and the general characteristics of analyzed the relation ship between the satisfaction level and the general characteristics of the 119 rescue and first aids, there were not statistically significant differences of sex distinction, age, scholarship, not married and has or have married, grade and qualification. There were statistically significant differences follow as working period, applying motive, moving, seeking a job, working place, an adviser, work overtime and compensation follow as work overtime. 3. It appeared that all the 119 rescue and first aids were satisfying enough about duty itself but were dissatisfying about working condition. As the results; job itself got 4.00, reciprocal action got 3.74, business demand got 3.28, autonomy got 3.06, organization demand got 2.96, pay got 2.43 and working condition got 1.72, each out of 5 full marks. As you see the results, most of the 119 rescue and first aids are satisfying about a job itself but they are dissatisfying about their working condition. Therefore we should formulate a plan that can increase the satisfaction level by improving duty system for 24 working hours per week.