• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.182-189
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• 2019

3D printing technology is changing the paradigm of consumer-oriented design in supplier-oriented mass production. 3D printing technology in construction is expected to be able to replace existing wet methods along with modular construction. Recently, a number of cases of building construction using 3D printing using mortar-based materials have been announced in many regions, including North America, Europe, and Asia. In this study, we developed a design support tool with a slicing function to output 3D modeling for architecture for a 3D printing machine. We analyzed the process and the function of slicing programs that are commercially available. Seven slicing functions required for the architectural field were derived by analyzing cases, expert reviews, and related literature. The derived functions were extended from the slicing functions to develop the design support tools. Detailed algorithms and processes need to be developed for future derived functions.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.5
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• pp.316-324
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• 2016

The purpose of this study is to review existing research trends to find highly reliable tools for measuring inconsistencies in parenting attitudes for adolescent children. We reveal factors that heavily affect reliability and feasibility of these tools and compose stable measurement items. We found a total of 37 items with high reliability and feasibility comprising six questions on affection, three questions on childcare, nine questions on interest, seven questions on demands, five questions on neglect, and seven questions on abuse. We surveyed first to third-year high school students in public and private schools nationwide and carried out statistical analysis for the 1,020 respondents. Upon analysis, questions were removed if they showed low factor loading (less than 0.6) for the father and mother in each of the 37 measurement items. Only questions that could be used for both the father and mother were extracted to carry out exploratory factor analysis. Eight questions were were deleted: five on interest, one on demands, one on neglect, and one on abuse. The final 29 questions were selected for the measurement tool. Cronbach's Alpha coefficient was used to analyze reliability, which showed high reliability values ranging from .857 to .931 for the father and mother. Therefore, these inspection tools for inconsistent parenting attitude were both reliable and feasible.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.6
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• pp.26-32
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• 2016

Usually, there are many uncertainties regarding the error of an assumed load, material properties, member size, and structure analysis in a structure, and it may have a direct influence on the qualities of optimal design of structures. Probabilistic analysis has developed rapidly into a desirable process and structural reliability analysis is an increasingly important tool that assists engineers to consider uncertainties during the design, construction and life of a structure to calculate its probability of failure. This study deals with the applications of two optimization techniques to solve the reliability-based optimization problem of structures. The reliability-based optimization problem was formulated as a minimization of the structural volume subject to the constraints on the values of componential reliability index determined by the AFOSM approach. This presented method may be a useful tool for the reliability-based design optimization of structures.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.2
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• pp.353-358
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• 2020

The new sales method of social commerce in food service market is growing steadily. Over 50 percent of the social commerce market is food service product. Food service companies are using social commerce, which is discount sales, as a marketing tool. There are many food service companies using social commerce as a sales and marketing tool. However, little research has investigated food service customers. Thus, this study suggests how food service customer's purchasing factor affects customer's satisfaction and loyalty of the supplier and business operator. Social commerce's purchasing characteristic factors are selected based on a previous study. Purchasing factor is divided into supplier and business operator side and the impact of the relationships between its subordinate factors (price discount, offering diversity, mutual action, brand intimacy) and customer's satisfaction is analyzed. As a result, price discount and brand intimacy show higher results. Offering diversity and brand intimacy of purchasing factor on business operator side shows a higher impact on the relationship between loyalty and ?? (Ed- 'the relationship between A and B'; what is B?). The study implications are as follows. The food service industry should establish different marketing strategies to apply social commerce and compare with social commerce business operators, because the actual place where customers use food service is food service restaurants and not just social commerce websites.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.7
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• pp.435-445
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• 2020

This study is a conceptual analysis of Yangsaeng, which is used as a key factor for healthcare in Oriental medicine that identifies the attributes of the concept of Yangsaeng and establishes a clear definition of the term. For this, the Walker and Avant approach to conceptual analysis was employed. The antecedents included the daily routine habits required for a healthy life and reducing the risk factors in daily life by promoting physical and mental health. The results were prolonged healthy life by preventing diseases, enhanced subjective well-being, and improved quality of life. This is defined as a tool for preventing and treating diseases through positive habits in daily life and for pursuing health and quality of life. This study is a re-evaluation of existing Yangsaeng measurement tools to resolve the antecedents of Yangsaeng and proposes a need for research aimed at developing a practical, new, stand-alone tool that allows the attributes of Yangsaeng and Korean culture to be incorporated. This study is significant in that it investigates and defines the attributes that are vague and abstract and can be applied as a practical basis for nursing intervention in the nursing field at the working level.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.7
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• pp.434-441
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• 2016

Friction Stir Welding (FSW) is a solid-state joining process involving the frictional heat between the materials and tools. The amount of heat conducted into the workpiece determines the quality of the welded zone. Excessive heat input is the cause of oxides and porosity defects, and insufficient heat input can cause problems, such as tunnel defects. Therefore, analyzing the temperature history and distribution at the center of the Friction Stir Welded zone is very important. In this study, the temperature distribution of the friction stir welding region of an AZ61 magnesium alloy was investigated. To achieve this goal, the temperature and metal flow was predicted using the finite element method. In FE analysis, the welding tool was simplified and the friction condition was optimized. Moreover, the temperature measuring test at the center of the welding region was performed to verify the FE results. In this study, the tool rotation speed was a more dominant factor than the welding speed. In addition, the predicted temperature at the center of the welding region showed good agreement with the measurement results within the error range of 5.4% - 7.7%.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.6
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• pp.2648-2654
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• 2012

This study aims to examine the effects of massages using various tools being frequently applied in skin care centers. It suggests the most effective method based on the comparative analysis on the body heat changes before and after the massages and also provides foundational data to develop back treatment programs. This research conducted manual, ultrasonic device, and also suction massages from July 3rd till 10th, 2011 to women at the age of 35 to 45 living in Gwangju, Jeonnam. And five of them were arranged for each tool. The body heat changes before the massages and after the 20-minute massages were measured with the body heat diagnostic device of thermograph DITI IRIS-XP. The collected data went through the t-test using SPSS 18.0. According to the result, the body temperature increased significantly before and after the manual massage from $30.82{\pm}0.52$ to $35.06{\pm}0.36$ (p<.001). The body temperature also increased significantly before and after the ultrasonic massage from $30.66{\pm}0.53$ to $35.14{\pm}0.39$ (p<.001). And the body temperature increased significantly before and after the suction massage from $30.93{\pm}0.47$ to $39.25{\pm}0.19$ (p<.001). The hand, ultrasonic device, and also suction were all effective as massage tools in terms of increasing body temperature, and the suction massage was shown to have the greatest effect in body temperature increase. Thus, the suction was analyzed as the most effective tool to be used to develop back treatment programs.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.11
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• pp.386-394
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• 2016

This study investigates the validity of a Korean version of the Client Assessment Summary (CAS), which is a tool used to assess the recovery of alcoholics. We investigated the Korean CAS's suitability for use in assessing the scale of recovery scale of general alcoholics in Korea. In this study, we analyzed the data of 205 abstaining alcoholics in order to determine the validity of the Korean CAS. We undertook relationship analyses of CAS contents, reliability, and composition validity through factor analysis. In addition, we assessed ARS, abstinence period, abstinence self-efficacy, illness insight, and motivation change variables. The factor analysis results, performed after verification of content suitability by assessing 12 questions and 4 factors, confirmed the tool's composition validity, with the results showing relatively high values (R2 = 76.26%, communality ${\geq}0.6$, and KMO = 0.92). Moreover, internal consistency was acceptable (Cronbach's alpha = 0.92), and the correlations among ARS, abstinence self-efficacy, illness insight, and motivation change variables confirmed the validity of the Korean CAS. The proposed Korean CAS is expected to be useful when academically and clinically assessing the recovery of alcoholics; thereby, eventually contributing to successful recoveries from alcoholism.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.5
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• pp.467-474
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• 2017

To investigate the intra-rater absolute reliabilities and validity of the Figure of-Eight Walk test (F8WT) in patients with chronic stroke. A total of 36 subjects with chronic stroke participated in this study. The inter-rater reliability of F8WT was calculated using intra-class correlation coefficients($ICC_{2,1}$). Moreover, we used the standard error measurement (SEM) and the small real difference (SRD) to examine the absolute reliability indices. The validity was demonstrated by a spearman correlation of F8WT with Postural Assessment Scale for Storke(PASS) and Trunk Impairment Scale(TIS). The inter-rater reliability of F8WT was excellent; ICC2,1=0.95(0.91~0.97), acceptable SEM=1.02, and SRD=2.82. F8WT were also found to be significantly associated with PASS(r=-0.82) and TIS(r=-0.85). Therefore, F8WT is a reliable measurement tool and is correlated well with stroke-impairments, such as postural and trunk control. F8WT will be a useful tool in evaluating the walking performance of subjects with chronic stroke.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.6
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• pp.55-67
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• 2018

The Korean defence industry has grown rapidly since the 1970s. In 2015, it generated more than 168 billion won in economic revenue, and exports exceeded 3.6 billion won. With the development of the defense industry, the level of the quality management system for major contractors has improved substantially, but there are many areas of the quality management system that still need improvement for small subcontractors. Therefore, in this paper, we develop a methodology to improve the quality management system for small subcontractors. Based on 101 collected cases, this methodology results in generally improved effects and generally improved methods. By applying the Russian Theory of Inventive Problem Solving (TRIZ) concept of a contradiction matrix, three improvement matrices are derived. A developed improvement matrix is the main support tool of this methodology. This methodology consists of four tasks and eight subtasks, and it can be used as a support tool for creative problem solving by the quality assurance department and the quality assurance manager for small subcontractors.