• Journal of Practical Engineering Education
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• v.8 no.2
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• pp.121-128
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• 2016

In injection molding process, the appearance quality issue occurs in most injection molded article. One of thermal designs for the mold was performed by increasing the cavity wall temperature with being as uniform as possible in any position. On the basis of the practical evaluation, the cavity wall temperature and finishing machined cavity surface under the optimum processing conditions are the most significant factors to avoid the appearance issue on the plastic part for a good cosmetic quality. Also, the wrong choice of gate type and location can have a considerable effect on the quality of a molded part and it's so important to keep the correct runner balance from each cavity. We've proposed the education training model of the practical tool technology course for the field oriented education to improve practical tool technology ability and optimized tooling design for injection molding quality which can be performed at the workplace substantially.

• Journal of Technologic Dentistry
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• v.43 no.2
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• pp.62-68
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• 2021

Purpose: This study examined the correlations between the satisfaction and effectiveness of practical training and theory lectures under two conditions: face-to-face lectures and non-face-to-face online lectures. Methods: A survey of 436 public health student, whereafter SPSS 20.0 (IBM) was used on the data to conduct frequency, descriptive statistics, and exploratory factor analyses. The Cronbach's α value was estimated in a reliability analysis, and a simple regression analysis was conducted to verify the study hypothesis. Results: It was found that the students preferred pre-recorded lectures online for both practical training and theory, claiming that when compared with face-to-face lectures, these non-face-to-face lectures meant a shorter commute and the ability to repeat the content. However, it was admitted that technical issues such as facilities or access difficulties and lower concentration could be a problem. The hypothesis that course satisfaction affects lecture effectiveness was verified, with both the practical training and theory lectures found to have a statistically significant positive (+) effect. The explanatory power of student satisfaction on the effectiveness of the theory component was slightly higher than that of the practical training component, with the students having more positive perceptions on the necessity of face-to-face lectures in practical training than they did for those in theoretical instruction. Conclusion: Providing non-face-to-face online theory courses and face-to-face practical training courses could increase student satisfaction and lecture effectiveness.

• Journal of dental hygiene science
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• v.13 no.4
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• pp.510-517
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• 2013

This study was carried out in order to be utilized as basic data necessary for developing dental hygiene curriculum by confirming the difference in propensity level and the variables of having influence upon problem-solving ability of dental hygiene students and by grasping influence of relevant variables at the point of time that requires arrangement of a learning system for promoting problem solving ability aiming to train talents who have ability available for performing successful practical affairs. The influence of factors upon the problem solving ability had statistically significant relationship with academic year, interpersonal relations, school record, and major satisfaction. According to academic year, the problem solving ability of sophomore (B=-0.182, p=0.010) was shown the lower tendency than junior. The problem solving ability was lower in when being bad (B=-0.349, p=0.020) compared to when being good as for interpersonal relations, in when the mark is under 3.0 (B=-0.328, p=0.004) than over 4.0 as for academic achievement, and in when being dissatisfied (B=-0.483, p=0.005) than when being satisfied as for the major satisfaction. Hence, to train competent people who have ability available for performing successful practical affairs, the education is considered to be likely needed that has substantial problem solving ability for reinforcing problem solving ability by grasping a learning problem oneself without the differentiated curriculum, by establishing an alternative plan for solving problem, and by searching for and acquiring necessary data according to factors of having influence upon problem solving ability of dental hygiene students.

• Journal of Venture Innovation
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• v.6 no.1
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• pp.17-34
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• 2023

This study tried to find a way to increase major satisfaction to overcome the difficulties of college due to the recent decrease in the number of educated population. In particular, problem-solving ability and digital literacy, which are essential in the era of the 4th industrial revolution, were set as influencing factors and mediators and tried to verify them. Therefore, in order to find out the effect of problem-solving ability on major satisfaction and the mediating effect of digital literacy, a study was conducted targeting junior college secretarial majors. A total of 193 questionnaires were analyzed, and regression analysis was performed to verify the hypothesis, and bootstrapping was performed using the SPSS PROCESS macro model 4 to verify the significance of the mediating effect. The results of the study are as follows. First, it was found that problem-solving ability had a positive(+) effect on major satisfaction. Second, problem-solving ability was found to have a positive(+) effect on all four sub-factors of digital literacy. Third, as a result of analyzing the mediating effect of digital literacy in the relationship between problem-solving ability and major satisfaction, among the four sub-factors of digital literacy, information literacy, critical understanding, and information analysis ability completely mediated between problem-solving ability and major satisfaction. has been shown to be effective. On the other hand, the ability to comply with norms was found to have no mediating effect. In this study, it was verified that problem-solving ability affects major satisfaction, and it was found that it is necessary to make various efforts to cultivate problem-solving ability. In addition, based on these research results, suggestions for preparing practical measures to increase major satisfaction were suggested.

• Journal of Korea Entertainment Industry Association
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• v.15 no.2
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• pp.213-222
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• 2021

The purpose of this study is to provide basic data for practical measures to improve life satisfaction through appropriate information utilization ability for the elderly by specifically grasping the effect of information utilization ability of the elderly on life satisfaction. The subjects of this study were 220 elderly people aged 65 and over who live in J city, Chungbuk. In order to examine the effects of the information literacy of the elderly on life satisfaction, frequency analysis, descriptive statistics analysis, correlation analysis, and multiple regression analysis were conducted. For statistical analysis, SPSS 20.0 program was used for analysis. The results of this study showed that information technology and information literacy were significant factors affecting life satisfaction among the information literacy abilities of the elderly. This means that the higher the information technology ability and information utilization ability in the information utilization ability of the elderly, the higher the life satisfaction. Especially, information literacy has a greater effect on life satisfaction than information technology ability. However, information provision ability and information criticism ability did not have a significant effect on life satisfaction. Based on the results of this study, policy suggestions are as follows: First, it is necessary to activate information education to improve the information literacy of the elderly. Second, it is necessary to build information infrastructure to improve the information technology ability of the elderly.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.8 no.3
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• pp.735-748
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• 2014

The fault-tolerance routing problem is one of the most important issues in the application of the Internet of Things, and has been attracting growing research interests. In order to maintain the communication paths from source sensors to the macronodes, we present a hybrid routing scheme and model, in which alternate paths are created once the previous routing is broken. Then, we propose an improved efficient and intelligent fault-tolerance algorithm (IEIFTA) to provide the fast routing recovery and reconstruct the network topology for path failure in the Internet of Things. In the IEIFTA, mutation direction of the particle is determined by multi-swarm evolution equation, and its diversity is improved by the immune mechanism, which can improve the ability of global search and improve the converging rate of the algorithm. The simulation results indicate that the IEIFTA-based fault-tolerance algorithm outperforms the EARQ algorithm and the SPSOA algorithm due to its ability of fast routing recovery mechanism and prolonging the lifetime of the Internet of Things.

• Journal of Fisheries and Marine Sciences Education
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• v.20 no.1
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• pp.12-22
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• 2008

This study presents the results of a delphi survey which is intended to identify technical skills that corporations expect of employees. A total of 300 managers from different businesses took part in the survey. To obtain the delphi data, a questionnaire of expected technical skills developed on the basis of previous research was used. The obtained data were analyzed in terms of frequency and other descriptive statistics. Eleven technical skills emerged as important ones in the corporate environment. In order of importance, subjects listed communication skills, business capabilities, negotiation skills, problem-solving ability, organizational adaptation, ability to gather and analyze relevant information, practical computer literacy, self-management, creativity, and foreign language proficiency.

• Communications for Statistical Applications and Methods
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• v.23 no.4
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• pp.343-353
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• 2016

In doubly-censored data, an originating event time and a terminating event time are interval-censored. In certain analyses of such data, a researcher might be interested in the elapsed time between the originating and terminating events as well as regression modeling with risk factors. Therefore, in this study, we introduce a model evaluation method to measure the predictive ability of a model based on negative predictive values. We use a semiparametric estimate of the predictive accuracy to provide a simple and flexible method for model evaluation of doubly-censored survival outcomes. Additionally, we used simulation studies and tested data from a prostate cancer trial to illustrate the practical advantages of our approach. We believe that this method could be widely used to build prediction models or nomograms.

• Journal of Industrial Technology
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• v.13
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• pp.89-96
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• 1993

In this paper, an OPS(Optical Protection Socket) unit is designed and prototyped for the application in the optical CPN(Customer Premises Network). The OPS unit, which plays an important role in the CPN for the enhanced network reliability, is consisted of $1{\times}2$ optical fiber splitter, combiner, and $1{\times}1$ optical switch to be a hybrid-typed unit. Various considerations, about power burget and optical information loss have given the most practical design for OPS. From the measurement of the realized OPS unit, it has proved such as the pertinent switching delay time with minimum data loss, the perceptive ability on the ONU degradation, the switching ability on the ONU malfunction.

• KIEAE Journal
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• v.2 no.2
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• pp.33-38
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• 2002

There are a number of practical uses for devices which are capable of piping large amounts of light: illumination of areas where there would be maintenance, safety, or security problems with electronic light sources; piping sunlight into indoor areas for illumination; and the conversion of high luminous efficacy, good color quality, high intensity discharge lamps into more acceptable linear of area sources of light. Prism light guides are hollow structures which pipe light by means of total internal reflectin(TIR). These devices are unique in their ability to combine the efficiency of TIR with the relatively low cost of hollow structure. An important application stems from their ability to transform a point source of light such as an incandescent or discharge lamp into a linear or area source of light or illumination. We report the development of an economical, flexible prismatic film for fabricating the light guide wall. This guide geometries and films are currently under development.