• Journal of Digital Convergence
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• v.18 no.10
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• pp.491-499
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• 2020

The purpose of this study is to grasp the difference in vocational education and training and vocational competency according to the career movement path, targeting middle-aged Koreans (ages 40 to 64) who have experience in vocational mobility. A survey was conducted for a month in February 2020, and among the 1,224 data, 845 middle-aged adults who had moved within the last 5 years were selected. First, 69.0% of them moved to work, and 48.2% of them moved to 'employment→employment'. Second, among all groups, 80.6% did not participate in vocational education and training. Third, the 'employment→employment' group had the highest perception of job basic ability and job competency and job seeking skills compared to other groups. And the job competency of middle-aged workers who moved from 'employment to unemployment and housework (childcare)' appeared to be slightly lower than those of other groups.

• Journal of Venture Innovation
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• v.7 no.2
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• pp.1-17
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• 2024

This study analyzed the effect of moving into an industrial park on the performance of a company using data from individual companies. In addition, regional variables were additionally set, and industrial complexes were divided into metropolitan and non-metropolitan areas for comparison. Data were collected through KIS-2022 (manufacturing) to verify the hypothesis. In the case of the analysis method, multiple regression analysis and Propensity Score Matching(PSM) were first used. The analysis results are as follows. First, it was found that companies that moved into industrial park had a positive effect on innovation performance than companies that did not move in. Second, in terms of financial performance, there was no statistically significant difference between companies that moved into the industrial park and those that did not. Third, there was a significant difference between companies that moved into industrial park and those that did not, depending on the metropolitan and non-metropolitan areas. Based on these analysis results, policy and academic implications could be presented.

• Proceedings of the KSME Conference
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• 2007.05b
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• pp.2238-2243
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• 2007

A new microcombustor configuration for a micro fuel-cell reformer integrated with a micro evaporator was studied experimentally and computationally. The present microcombustor is simply cylindrical to be easily fabricated but two-staged, expending downstream, to feasibly control ignition and stable burning. Results show that the aspect ratio of the first stage and the wall thickness of the microcombustors substantially affect ignition and thermal characteristics. For the optimized design conditions, a premixed microflame was easily ignited in the expanded second stage combustor, moved into the smaller first stage combustor, and finally stabilized therein. The measured and predicted temperature distributions across the microcombustor walls indicated that heat generated in the microcombustor is well transferred. Thus, the present microcombustor configuration could be applied to the practical micro reformers integrated with a micro evaporator for use of fuel cells.

• Journal of the Korean Society of Industry Convergence
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• v.18 no.3
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• pp.167-172
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• 2015

In this paper, we propose a new approach to design and control a smart gripper of robot system. A control method for flexible grasping a object in partially unknown environment was proposed, where a proximate sensor detecting the distance between the fingertip and object was used. Based on the proximate sensor signal the finger motion controller could plan the grasping process divided in three phases. The first step is scanning process which two first joints were moved to mid-position of the detected range by a state-variable feedback position controller, after the scanning was finished. The contact force of fingertip was then controlled using the detection sensor of the servo controller for finger joint control. The proposed grasping planning was tested on rectangular bar.

• IE interfaces
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• v.14 no.2
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• pp.111-119
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• 2001

A tandem AGV system is based on partitioning all the stations into non-overlapping single vehicle closed loops with additional stations provided as an interface between adjacent loops. For an efficient use of this configuration, it is required to solve the load routing problem(LRP), which is primarily based on the fact that a load may be handled by several vehicles and moved through several loops before it reaches its destination. In this paper, a heuristic based on genetic algorithm(GA) is first developed to solve LRP. The first model obtains the optimal route of each job and the optimal direction of each loop when the vehicle in each loop travels unidirectionally. The second GA model obtaines the optimal polling sequence of the empty vehicle in each loop, when the vehicle can move bidirectionally.

• Korean journal of applied entomology
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• v.60 no.4
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• pp.431-448
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• 2021

We decided the efficient application timings of organo-synthetic insecticides for controlling the first generation larvae of O. furnacalis through investigations of insect stage-specific densities, damage aspects in maize, and effects of insecticides. A waxy maize cultivar, Ilmichal, was cultivated from April 20 (sowing) to July 26 (harvest, dough stage of maize) in Suwon, 2016. The maximum and 50% cumulative catch dates of the overwintering generation adults in the sex pheromone trapping were May 29 and May 31, respectively. Most of the first generation larvae finished their occurrence till the early reproductive stage of maize. The first generation larvae fed on leaves inside the whorl leaves before tassel and stem development of maize, sequentially moved to tassel and stem, and then moved finally to stem and ear parts. In the results of insecticide applications at different dates, the 9-11 leaf stage (June 10~17) and the 6-7 leaf stage (June 3) of maize were the most efficient application timings for direct spray of Etofenprox EC to maize, and for application of Carbofuran granules onto soil surface, respectively, which resulted in suppression of tunnelling damages. The timings for the two insecticides were 12-19 days and 5 days after the adult maximum catch date, respectively. Those timings after the 50% cumulative adult catch date were advanced 2 days.

• International Journal of Human Ecology
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• v.13 no.1
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• pp.29-37
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• 2012

This study examined risk and protective variables related with the continuity of developmental risks among 136 infants, aged 4-10 months. Using the Denver Developmental Screening Test, 136 infants among 2978 infants in the first wave of the Korea Child Panel were classified into the developmental risk group. Among the 136 risk group infants, 45 infants stayed in the risk group (continuing risk group) and the other 91 infants moved into the normal group (recovering risk group) after 1 year. Group differences were tested in the levels of infant, mother and father variables to examine which variables were associated with the continuity of developmental risks for a year. Variables indicating parents' marital relationships such as the mothers' marital satisfaction and conflict of the first wave and the fathers' marital satisfaction of the second wave significantly distinguished the continuing from the recovering risk group. In addition, there were significant group differences in the levels of mothers' self-efficacy in the first wave. The findings suggest that the exposure to marital conflict during infancy is associated with the continuity of developmental risks.

• The korean journal of orthodontics
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• v.23 no.2 s.41
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• pp.263-273
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• 1993

The purpose of this study was to analyse the center of resistance of the maxillary first molar using the 3-dimension finite element method. An extracted maxillary first molar of normal shape and average root length was selected and sectioned every 1.5mm parallel to the cementoenamel junction. Each section was traced and digitized to construct 3-D finite element model of the maxillary first molar. After a certain magnitude of counterbalancing moment(M) was applied to the tooth, a varying single force(F) of distomesial direction was applied to a certain point of th tooth until the tooth was translated. The force producing translation(Ft) was substituted to the equation ${\Delta}d=M/Ft$ to calculate the center of resistance of the maxillary first molar. And reducing the alveolar bone level 1.68mm, and 3.36mm below to the cementoenamel junction, the tooth movement was analysed to see the effect of reducing the alveolar bone level to the location of the center of resistance. The results were as follows ; 1. The center of resistance of the maxillary first molar was 3.72mm apical, 1.10mm buccal, and 0.71mm mesial to the geometric center of the horizontally sectioned surface at the cementoenamel junction. This point was 0.36mm apical, 1.20mm buccal, and 0.71mm mesial to the trifurcation point, indicating that it was not on the tooth root. 2. As the alveolar bone level was reduced, the center of resistance of the maxillary first molar was moved to the apical direction.

• Journal of Family Relations
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• v.21 no.3
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• pp.73-93
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• 2016

Objective: The purpose of the present study was to examine how children's transition to adulthood might be related to their parents' marital satisfaction and relationship satisfaction with children. Specifically, we investigated if the numbers of children who (1) graduated from 4-year college, (2) were employed, (3) were married, (4) moved out of parental homes and lived independently, and (5) had at least one child might be associated with better marital satisfaction and higher relationship satisfaction with children among midlife and older parents. We also evaluated if the associations might differ by gender of the children (sons vs. daughters) as well as by their gender and birth order (first-born son, later-born son, first-born daughter, later-born daughter). Method: The analytic sample was drawn from the 2006 Korean Longitudinal Study of Ageing. The sample consisted of 1,905 parents whose children were aged between 25 and 35. For analysis, regression models with robust standard errors were estimated using Stata. Results: Results suggest that sons' (especially first-born sons') transition to adulthood exerted more consistent impacts on parents. More specifically, first-born sons' completion of higher education, marriage, and independent living arrangement were associated with either higher levels of parental marital satisfaction or relationship satisfaction with children. With regard to later-born sons, their completion of college education was linked to higher levels of parental marital satisfaction and relationship satisfaction with children. Conclusion: Korean parents appear to place greater importance on first-born sons' successful transition to adulthood compared to those of other children. Overall, however, transition to adulthood may have limited influence on Korean parents.

• Korean Journal of Human Ecology
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• v.21 no.2
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• pp.285-298
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• 2012

Considerable number of women are enjoying swimming, however, the chest-region of swimsuits including cup inserts are not stable during swimming. The purpose of this study was to explore alternate designs and methods of stabilizing the breast cup to the swimmer's body by using 3D technology to design and position the pad and cup pattern of the swimming suit. To position the pad optimally, a 3D pattern of a nude woman was divided into blocks and different reduction rates were applied to blocks around the outlines of the breast. Two types of 3D patterns were developed. The first, referred to as the 'basic 3D pattern' provided for the curved surface of the breast point to be maintained with the remaining slack distributed evenly along the neckline, armhole and side seam. The second, referred to as the '1/3 shoulder moved 3D pattern' ignored the curved nature of the breast point by overlapping, with the resulting position of the shoulder strip moved toward the center. Three women of corresponding size and body shape evaluated the two 3D pattern designs as well as the conventional 2D pattern style of swimsuit. Respondents rated the'the basic 3D pattern' design highest in terms of stability and easy of movement in the chest region.