• KSCE Journal of Civil and Environmental Engineering Research
• /
• 제29권4B호
• /
• pp.329-337
• /
• 2009

In this study we briefly introduce the electronic float system based on the GPS and RF communication technology and present some field application results. The system is capable of operating 15 floats simultaneously for making discharge measurement. Since the electronic floats (EFs) acquire flow paths, they can improve velocity measurement accuracy up to 10%. Additionally, measured velocities by the EFs show good agreement with those by an ADCP. Relative difference in sub-section area calculated by the electronic and conventional float methods is -79~71% and, due to convergent tendency of floats flowing along near banks, it increases much larger. It is possible to improve accuracy up to 5~6% in making discharge measurement by the electronic floats at site with irregular flow paths and section arrangement. The electronic float system is capable of calculating more accurate velocity and section area using position information based on GPS. By real-time measurement of velocity, cross-section area and discharge, the electronic float system is expected to reduce manpower and improve accuracy, rapidity and efficiency of flood discharge measurements.

• The Korean Journal of Franchise Management
• /
• 제9권1호
• /
• pp.27-39
• /
• 2018

Purpose - Recently, the mobile application field has been receiving astronomical attention from the past few years due to the growing number of mobile app downloads and withal due to the revenues being engendered. Especially delivery apps by mobile service market is experiencing rapid growth and competition is intensifying. Therefore, delivery apps' choice attributes has become important as a strategy for survival of franchise firms. Based on previous studies, this research proposed the theoretical framework about the structural relationships among customer satisfaction, trust and revisit intention on delivery apps' choice attributes. Research design, data, and methodology - This study examines the structural relationship between choice attributes of using the delivery app, satisfaction, trust, and revisit intention. More specifically, this study has been examined from the perspective of Generation Y who is enjoying electronic commerce and shopping with mobile phone. In this model, choice attributes of delivery app consists of three sub-dimensions such as service quality, system quality, interaction quality. So as to test the purposes of this study, research model and hypotheses were developed. After excluding 24 invalid respondent questionnaires, 201 valid questionnaires were coded and analyzed using frequency, confirmatory factor analysis, correlations analysis, and structural equation modeling with SPSS 21 and SmartPLS 3.0. Result - The results of the study are as follows. First, service quality and interaction quality had positive effects on satisfaction, and interaction quality had positive effects on trust, but system quality did not have a significant effect on both satisfaction and trust. Second, satisfaction had positive effects on both trust and revisit intention. Third, trust had positive effects on revisit intention. Conclusions - The implications of this study are following as: From the theoretical perspective, this study confirms the effect of delivery apps' choice attributes on satisfaction, trust, and revisit intention. In addition, it is significant that we examined the influence of choice attributes of delivery apps on their attitudes and behaviors of Generation Y familiar with mobile environment. Through this study, we hypothesized that the attributes of service quality and interaction quality of delivery apps have a significant effect on customer satisfaction, and this can be expected to provide meaningful implications for the development of franchise restaurant industry. To encourage continuous repurchase through customer satisfaction, franchise companies need to establish various strategic alliances with delivery app companies and new growth engines by providing diverse and high-quality services to customers in the smart age.

• Journal of Korean Society of Rural Planning
• /
• 제29권1호
• /
• pp.37-49
• /
• 2023

Active attention and effort are needed to develop an integrated water management system in response to climate change. In this study, it proposed models for cross-use of agricultural water and river maintenance water using sewage treatment water as an integrated water management system for the Yeongsan River. The impact of the integrated water management models was assessed by applying the concept of Nexus, which is being presented worldwide for sustainable resource management. The target year was set for 2030 and quantitatively analyzed water, energy, land use and carbon emissions and resource availability index by integrated water management models was calculated by applying maximum usable amount by resource. An integrated water management system evaluation model using the Nexus concept developed in this study can play a role that can be viewed in a variety of ways: security and environmental impact assessment of other resources. The results of this research will be used as a foundation for the field of in the establishment of a policy decision support system to evaluate various security policies, as we analyzed changes in other factors according to changes in individual components, taking into account the associations between water, energy, food, and carbon resources. In future studies, additional sub-models need to be built that can be applied flexibly to changes in the future timing of the inter-resource relationship components.

• Journal of Korean Society of Forest Science
• /
• 제112권4호
• /
• pp.405-416
• /
• 2023

In this study, the sustainability of Abies nephrolepis in the presence of Tripterygium regelii was analyzed. To accomplish this, a field survey of140 stands was conducted. Based on the presence or absence of T. regelii, as well as the layer in which it was present (where appropriate), the type of T. regelii presence wasclassified as follows: TP type, indicating the presence of T. regelii in the tree and sub-tree layers; SP type, indicating its presence in the shrub layer; and A type, indicatingits absence from all layers. The indicator species analysis revealed T. regelii to be an indicator species of the TP type and SP type. The MRPP test was used to examine the differences among the types. Moreover, the seedling and DBH class analysis indicated there to be a difficulty in terms of the status competition, as the number of young trees generated by A. nephrolepis was the lowest in the TP type. The findings of this study enhanced our understanding of the vegetation structure of A. nephrolepis, thereby contributing to efforts concerningits conservation and management.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
• /
• 제17권1호
• /
• pp.79-87
• /
• 2022

Recently, as the awareness of the necessity of entrepreneurship education has spread in secondary education, the competency of educators in the field of education has become more important. This study tried to derive the priority of education needs by exploring the competency of educators to practice entrepreneurship education and the result from analysis of the difference in importance and performance. For conducting the analysis, this study conceptualized entrepreneurship education competency based on the TPACK (Technological Pedagogical Content Knowledge) model and developed a questionnaires to measure those competencies. Using TPACK and developed questionnaires, a survey was conducted on 217 secondary school teachers who were interested in entrepreneurship education, and derived the difference between importance-level and current-level was analyzed with a t-test. As a result of the study, for all sub-factors of TPACK, the mean of importance-level was higher than the mean of current-level, indicating that educational prescription was required. Also, as a result of analysis of Borich's requirements and The Locus for Focus Model, it was found that the factor with the highest priority in education was CK(Content Knowledge). Based on the results of study, implications for strengthening competencies for entrepreneurship educators were derived.

• Korean Journal of Acupuncture
• /
• 제41권2호
• /
• pp.33-42
• /
• 2024

Objectives : The sigma-1 receptor is implicated in stress, depression, psychostimulant sensitization, and addiction vulnerability. Prior studies have indicated that ethanol exposure modulates sigma-1 receptor activity within the Ventral Tegmental Area (VTA). Here, we explore the sub-mechanisms underlying sigma-1 receptor activity induced by HT7 (Shinmun) stimulation in behavioral alterations following acute ethanol (ETOH) administration. Methods : Male Wistar rats were investigated for pro- and anti-inflammatory markers after injection of ETOH (1 g/kg) using cytokine enzyme-linked immunosorbent assay (ELISA)s. After confirming that HT7 stimulation changed the total distance traveled in the open field test (OFT), protein changes in the Ventral tegmental area (VTA) were measured by Western blotting. The expression level of inducible nitric oxide synthase (iNOS) after administration of a sigma-1 receptor antagonist (dihydrobromide 1047; BD1047, 10 mg/kg i.p.) and Shenmen (HT7) stimulation was compared. Results : As a result, acute ETOH administration increased proinflammatory marker levels (TNF-𝛼 and IL-6). HT7 stimulation restored the total distance response after acute ethanol administration. In addition, in the VTA, the levels of a microglial marker (iNOS), sigma-1 receptor and protein kinase C, which are predicted to be involved in up- and downregulation, were restored by HT7 stimulation. In particular, HT7 stimulation modulates iNOS expression through effects similar to BD treatment. This study suggests that the stimulatory effect of HT7 may be driven by microglial activation. Conclusions : Microglial activity is regulated by sigma-1 receptor, and sigma-1 receptor activity is regulated by HT7 stimulation. Significantly, we demonstrate that HT7 stimulation ameliorates behavioral alterations induced by acute ETOH administration through microglial activation within the VTA.

• Resources Recycling
• /
• 제33권3호
• /
• pp.3-11
• /
• 2024

This study addressed the cost structure of metallurgical plants for vanadium recovery or production, which were previously planned or implemented. Vanadium metallurgy consists of several sub-processes such as such as pretreatment, roasting, leaching, precipitation, and filtration, in order to finally produce vanadium pentoxide. Here, lots of costs should be spent for such plants, in which these costs are largely divided into CAPEX (Capital Expenditure) and OPEX (Operational Expenditure). As a result, the capacities (feed input rates) and vanadium contents are various along the target projects for this study. However, final production rates and grades of vanadium pentoxide showed relatively small differences. In addition, a noticeable correlation is found between capacities and specific operating costs, in that a steadily decreasing trend is described with a non-linear curve with around -0.3 power. Therefore, for the plant capacity below 100,000 tons per year, the specific operating cost rapidly decreases as the capacity increases, whereas the cost remains relatively stable in the range of 0.6 to 1.2 million tons per year of the capacity. From a technical perspective, effective optimization of the metallurgical process plant can be achieved by improving vanadium recovery rate in the pre-treatment and/or roasting-leaching processes. Finally, the results of this study should be updated through future research with on-going field verification and further detailed cost analysis.

• Journal of Intellectual Disabilities
• /
• 제20권2호
• /
• pp.41-66
• /
• 2018

There has been a growing emphasis on social-ecological perspective of disability in the field of special education. Correspondingly, the role of supports that assist students with intellectual disability to meaningfully participate in various activities is highlighted. Supports Intensity Scale (SIS) is a standardized tool that is designed to measure support needs of people with intellectual and developmental disabilities. There are two types of Supports Intensity Scale: Supports Intensity Scale - Adult Version (16-64 years old) and Supports Intensity Scale - Children's Version (5-16 years old). Although SIS has been translated in various countries, relatively limited studies have been conducted in Korea. Considering this aspect, the purpose of this study is twofold. First, we discussed two versions of SIS in depth (e.g., purpose of administration, constructs that is measured, sub-domains, administration method). Second, we conducted a literature review to provide (a) an overview of SIS existing studies (e.g., publication year, study theme, participant, study method, study result) and (b) specific study findings based on study categories (psychometric properties, the role and function of SIS, analyses on support needs and relevant variables, and research efforts to update SIS). Implications for future studies and practices are provided.

• Journal of the Korean Society of Environmental Restoration Technology
• /
• 제26권4호
• /
• pp.51-59
• /
• 2023

Despite countries' efforts to reduce carbon emissions, carbon emissions have increased in recent decades along with energy use, of which building energy uses account for a large proportion. Energy savings are essential as a strategy to reduce carbon emissions in existing buildings. The field experiment on the roof of a building located in Seoul was designed to measure the temperature reduction effect of green roof with rainwater storage tank to reduce cooling energy consumption in summer. The results showed that the mean mean surface temperature under the green roof was 14.77 degrees lower than that of the non-green roof from 13:00 P.M. to 15:00 P.M., which would have a great effect on reducing cooling energy. From 01:00 A.M. to 03:00 A.M., the effect was 3.36 degrees, showing that tropical nights could be improved. The temperature reduction effect due to the rainwater storage system increased by 1.45 degrees during the day and decreased by 0.63 degrees at night. The storage system can be strategically utilized to reduce carbon emissions during the week when cooling energy increases significantly.

• Journal of Industrial Convergence
• /
• 제22권7호
• /
• pp.31-41
• /
• 2024

The purpose of this study is to analyze how to utilize sports cooperatives that can be a pleasure to work and add living expenses through sports as a model for creating jobs for the elderly. To this end, after reviewing the literature and expert survey using Delphi techiques for 9 sports experts and 4 cooperative experts, the following conclusions were drawn analyzing with Excel, SPSS V28, and AHP analysis Dress V 1.7 program First, as a model for creating jobs for the elderly, the economic factors, social factors, institutional factors, and middle categories 10 factors and sub-categories 36 factors were derived from the major categories for the utilization of sports cooperatives. Second, through senior sports cooperatives, economic activities generate income, and volunteer and talent-sharing activities provide opportunities for physical and mental health and social participation. And, as corporations, they can expand profit-making projects through government and local government collaboration and partnership projects, contributing to solving issues related to the elderly. In the future, follow-up studies are needed to explore the needs, satisfaction, problems, improvement plans, utilization plans, and development directions of sports cooperatives in the sports field.