• Journal of The Korean Association For Science Education
• /
• v.37 no.5
• /
• pp.835-846
• /
• 2017

The purpose of this study is to investigate the perceptions of scientifically gifted middle school students about their engineering design process according to gender and talent division. The instrument in surveying their perceptions about the engineering design process consists of 24 items (Likert 5 point type) five domains: problem definition, information collection and utilization, idea generation, inquiry performance, and teamwork (communication, cooperation, leadership). A total of 102 scientifically gifted students participated in the survey, according to gender (69 males and 33 females) and talent divisions (physics, biological sciences, software, mathematics, space-geological sciences, and chemistry). They had a high level of awareness of their engineering design ability. It is necessary to develop a customized gifted-education program so that their talent in their field of interest can be fully displayed according to the gender and talent division. In addition, the teaching and learning methods and strategies of the engineering design program for the scientifically gifted middle school students should be established to fully reflect the practical needs of the talented.

• Journal of Korea Port Economic Association
• /
• v.28 no.3
• /
• pp.91-110
• /
• 2012

In the modern management literature, knowledge has been recognized as a new strategic resource enabling a firm to create its competitiveness. Shipping companies under fierce competitive structure need to pay attentions to the utility of knowledge management. A shipping firm may develop its unique service capability by classifying, sharing, and transferring the data, information and knowledge obtained from both inside and outside its global service network. The current study attempts to analyze influential relationships between liner shipping firms' knowledge management and service capabilities. In order to achieve this goal, this study designed a knowledge chain model measuring shipping companies' knowledge management levels and tested its validity and reliability based on a total of 80 replied questionnaires from national and foreign liners. The empirical result presents that supportive and primary activities composing a knowledge chain could exert significant positive influences on the enforcement of shipping service capabilities. This research shows that the utility of knowledge management is adoptable in the maritime industry, and recommends that shipping firms should recognize strategic importance of knowledge and actively pursue knowledge management at an entire firm level.

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.23 no.2
• /
• pp.161-167
• /
• 2017

This paper measured and evaluated the technical efficiency, pure technical efficiency and scale efficiency of port labor via three inputs and three outputs using Data Envelopment Analysis (DEA). First, the average overall technical efficiency measured about 94.18 %, with 100 % pure technical efficiency being larger than 94.18% scale efficiency. As a result, 7 ports were identified as efficient, and 4 ports were identified as inefficient. Among the 4 ineffiecient ports, Donghae had the highest Increasing Return to Scale (IRS). However, the inefficient ports were all found to be less efficient in terms of resource operation than production scale. On the other hand, the efficient ports established priorities using the super efficiency method. As a result, port efficiency was highest for Incheon, Mokpo, Pyeongtaek-Dangjin, Masan, Yeosu Gwangyang, Jeju, and Gunsan-Daesan Ports, in order. In particular, Busan Port, found to be inefficient, would benefit from using Mokpo Port and Incheon Port as benchmarks to increase trade volume and modernize equipment for full-scale commercialization to improve labor efficiency.

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.34 no.1
• /
• pp.1-8
• /
• 2008

Epidermis is one of the most dynamic organs in the human body. Multiple layers of keratinocytes in the epidermis continuously undergo proliferation, differentiation, and desquamation cycles, which is the bases of maintaining the epidermal homeostasis. Epidermal homeostasis eventually leads to establish and maintain permeability barrier homeostasis, the most important function of the epidermis. The permeability barrier is located in the stratum corneum. Tightly coordinated regulations are required for the sustained normal barrier function. Extensive studies have established that several nuclear hormone liposensors, including peroxisome proliferator-activated receptor a PPARa, PPARb/d, PPARg and LXRs are expressed in keratinocyte. Activation of PPARs and LXRs could provide a mechanism to coordinate the formation of the corneocytes and extracellular lipid membranes that constitute the stratum corneum. Topical application of PPAR/LXR ligands to murine skin results in the increased expression of keratinocyte differentiation-related proteins, such as involucrin, loricrin, profilaggrin, and trans-glutaminase 1, which would stimulate cornified envelope formation. In conclusion, topical application of ligands or activators of PPAR/LXR as an epidermotherapy would be a promising option to deal dry skin conditions such as atopy.

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.43 no.4
• /
• pp.321-327
• /
• 2017

This study was carried out to develop a stable plant-derived natural sunscreen (BHC-S) that replaces the artificially synthesized organic sunscreen agents. The natural sunscreen (BHC-S), which is composed of peanut extract, Centella asiatica extract, and Ecklonia stolonifera extract, has the same level of ultraviolet shielding effect as PARSOL MCX-XR (OMC), which is a synthetic sunscreen. and has safety against skin. MultiFunctional effect such as and anti-wrinkle improvement. Thus, it can be used as raw material for natural cosmetics for ultraviolet ray blocking, and anti-aging.

• Journal of Convergence for Information Technology
• /
• v.7 no.4
• /
• pp.171-183
• /
• 2017

The purpose of the study was to identify the factors influencing the nursing students' job-seeking stress. A cross-sectional descriptive survey, using a structured questionnaire, was used to collect data from Sep. to Oct. 2016. A sample of convenience was 246 nursing students and a questionnaire was used to measure their major satisfaction, CDMSE, self-esteem, ego-resiliency, and job-seeking stress. A significant negative correlation was found among job-seeking stress, major satisfaction, CDMSE, self-esteem, and ego-resiliency. Grade of which the participant was in, self-esteem, academic achievement, experience of clinical practice, and family economic status were significant predictive variables of which accounted for 46.1% of the variance in job-seeking stress. The results from this study can be used to develop programs for job-seeking stress management.

• Journal of Korea Water Resources Association
• /
• v.39 no.12 s.173
• /
• pp.1031-1042
• /
• 2006

In recent years, a growing concern exists in watershed and stream improvement projects. Under these circumstances, this paper estimates monetary value of the attributes of alternatives for rehabilitation of hydrologic cycle using choice experiments. Choice experiments shows vivid image and estimates a willingness to pay based on their preference for environmental goods. A preliminary survey shows that the attributes of the Anyangcheon watershed are flood-damage possibilities, Instreamflow, water quality, river characteristic and estimates the tax for the Anyangcheon watershed improvements. We surveyed 200 citizens were selected as samples of watershed beneficing in Seoul and Gyeonggi Province and used conditional logit model to analyze the implicit values of the attributive per household. The benefit of the attributes by province based on the implicit price obtained from estimated parameters were calculated. This study is expected to contribute to the decision-making process for policy-makers by providing useful methodological framework and quantitative information related to watershed improvement projects.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.25 no.3
• /
• pp.207-213
• /
• 2007

For several years, although the demand of high accuracy kinematic positing using multiple bases has been increased, most of the commercial GPS processing softwares can provide the single-baseline solutions only. Thus, we studied the methods to improve the accuracy of the kinematic positioning using the network configuration based on the several single-baseline solutions. As discussed in this study, the positioning accuracy as well as the network stability is improved by introducing the geodetic network adjustment theories into the kinematic positioning application. Three different methods to remove the rank-deficiency, RLESS, BLIMPBE and SCLESS, are analyzed in this study. The 3D RMS error has been improved from 3.5cm(max) to 2.1cm using the network-based kinematic positioning, and it is desired to choose BLIMPBE and SCLESS depending on the accuracy of the base stations.

• Journal of Life Science
• /
• v.13 no.6
• /
• pp.782-787
• /
• 2003

Perill(Perilla frutescens var. japonica $H_{ARA}$), “Ipdlkkae 1” was tested for the yield components in accordance with several different application levels, seeding methods and seeding dates. The results were summarized as follows: Application of fertilizer remarkably increased leaf number and leaf weight. Specially nitrogen showed the most significant effect. The best combination of NㆍPㆍK for cultivation of perilla was investigated ill three leveles of 6kg /10a, 9kg/10a, and 10kg/10a. The planting density in $10cm\times10cm/m^2$, and the seeding date on December 23 were found as the best results. However, $10cm\times7cm/m^2$ planting was better to get heavy leaf.Perill(Perilla frutescens var. japonica $H_{ARA}$), “Ipdlkkae 1” was tested for the yield components in accordance with several different application levels, seeding methods and seeding dates. The results were summarized as follows: Application of fertilizer remarkably increased leaf number and leaf weight. Specially nitrogen showed the most significant effect. The best combination of NㆍPㆍK for cultivation of perilla was investigated ill three leveles of 6kg /10a, 9kg/10a, and 10kg/10a. The planting density in $10cm\times10cm/m^2$, and the seeding date on December 23 were found as the best results. However, $10cm\times7cm/m^2$ planting was better to get heavy leaf.

• Journal of the Korean Geographical Society
• /
• v.45 no.4
• /
• pp.461-477
• /
• 2010

Recent environmental issues such as genetically modified organisms, the loss of biodiversity, climate change, and nuclear waste cannot be reduced to a matter of science or society and explained through nature-society dualist approaches because of their complexity and heterogeneity. This paper examines how nature-society dualism has been embedded in science studies and geography and how this dualism can be overcome. Actor-Network Theory as an attempt to overcome this nature-society dualism is appropriate in analysing "strange imbriglio" of biology, politics, technoscience, market, value, ethics and facts that constitute our society by focusing on heterogeneous association, and can contribute to providing a useful framework to solve environmental problems.