Case Study Of Korea Research Articles

Service-Led Model for the Activation of Smart TV: Case Study in Korea

Purpose: This study explores the characteristics of STV service to empirically examine effects of the services on adoption and usage of STV to lead sustained growth of the STV industry.Methodology/Approach: This study employs structural equation modeling as a quantitative approach, to examine causal relationships between service characteristics and user intentions. The survey collects 212 data only from actual users of STV, who have experienced STV functions or services, in South Korea.Findings: The results of service-oriented model based on extended Technology Acceptance Model (TAM) indicate that ‘interactivity’, ‘content quality’, and ‘simplicity’ as service characteristics influence intention to use STV.Research Limitation/implication: First, the STV industry should establish a distribution structure that generates sufficient profits for content providers as done in Smartphone market. Second, Services of STV should be provided to allow two-way communication and to allow users to engage in active interactions with other users.Originality/Value of paper: This study makes contributions to research on both new products and service adoption by providing richer explanations of the mechanisms acting on the actual use of STV. Given that STV is considered a key appliance for the next generation of social media and smart appliance, our findings offer new directions on how to realize high quality services in the STV industry.

Reconnecting the Dots for the Payment Service Directive 2 - Compatible Asian Financial Network

Unlike the popular belief, digital transformation mainly gets stymied by legal and regulatory issues related with legacy institutions in Asia rather than technical difficulties. The real challenges triggered by the PSD2 (Payment Services Directive 2) are how the region would overcome the overly fragmented, centralized, and hierarchical legacy framework to allow necessary changes to respond to the digital single market initiatives as promulgated by the European counterpart. The PSD2 is expected to bring about substantial changes in the payment ecosystem by allowing payment service providers to access customers’ accounts and transactions information via API that have been traditionally controlled by banks. This paper suggests an incentive-compatible mechanism design for open collaboration among legacy institutions in the region to help them adapt to the PSD2. As evidenced by case studies in Korea, the Asian equivalent of PSD2 can be implemented and further expanded to create region-wide PCS (payment-clearing-settlement) network by reconnecting the dots of legacy infrastructures. These decentralized, diverse, small payment networks can be further combined with the expanded RTGS-CDS platform to evolve into the next phase of Asian Financial Network.

경상남도 빈집실태 분석 - 도시와 농촌지역 비교 연구 -

There are approximately 1.06 million vacant homes in Korea, accounting for 6% of all housing, and approximately 98 thousand vacant homes are in Gyeongsangnam-do, taking up 8.7% of the housing in the province. In particular, the number of abandoned house in Gyeongsangnam-do is rapidly increasing from 6.7% in 2010 to 8.7% in 2015. This study examined the current state of abandoned house in Gyeongsangnam-do according to the characteristics of cities and rural areas, causes for vacancies, and demand for use of such abandoned house. The study areas were selected based on case studies in Korea and overseas, and a survey was conducted among residents in the selected areas. The survey was on awareness of abandoned house in the neighborhood, causes for vacancies, awareness of owners, the influence of the abandoned house, plans to deal with abandoned house, and plans to utilize abandoned house. The results showed that most residents were aware of abandoned house, especially the ones in rural areas, who had detailed perceptions about abandoned house nearby such as when the homes became empty and whether there are owners of the homes. As for the influence of abandoned house on the surrounding environment, both rural areas and cities responded that abandoned house mostly spoil the beauty of the neighborhood, followed by psychological anxiety such as fear of crimes. Regarding plans to utilize abandoned house nearby, at least half of the residents wanted to use them as rental housing after repairing them. A survey on the actual condition must be conducted at the provincial level in order to establish an integrated system to manage abandoned house in Gyeongsangnam-do. Moreover, it is necessary to come up with application measures according to categories and standards to classify the state of abandoned house in order to use them as resources for community regeneration.

A Frequency–Power Droop Coefficient Determination Method of Mixed Line-Commutated and Voltage-Sourced Converter Multi-Infeed, High-Voltage, Direct Current Systems: An Actual Case Study in Korea

Among the grid service applications of high-voltage direct current (HVDC) systems, frequency–power droop control for islanded networks is one of the most widely used schemes. In this paper, a new frequency-power droop coefficient determination method for a mixed line-commutated converter (LCC) and voltage-sourced converter (VSC)-based multi-infeed HVDC (MIDC) system is proposed. The proposed method is designed for the minimization of power loss. An interior-point method is used as an optimization algorithm to implement the proposed scheduling method, and the droop coefficients of the HVDCs are determined graphically using the Monte Carlo sampling method. Two test systems—the modified Institute of Electrical and Electronics Engineers (IEEE) 14-bus system and an actual Jeju Island network in Korea—were utilized for MATLAB simulation case studies, to demonstrate that the proposed method is effective for reducing power system loss during frequency control.

Willingness to pay for a second-generation bioethanol: A case study of Korea

This article examines Korean consumer responses towards second-generation lignocellulosic bioethanol. Consumer surveys were conducted in the Korean cities of Seoul, Incheon, Bucheon, Gwangju, Seongnam and Suwon with three information treatments for the purpose of this study. The survey collected data on consumers’ willingness to pay (WTP) for this product, their driving patterns, knowledge about renewable energy, acceptance of relevant government policies, and demographic characteristics. A dichotomous-choice contingent valuation methodology is used to estimate WTP for this product and investigate factors that affect consumer choice. The findings include that the average respondent in the sample is willing to pay a 4.3% premium over second-generation bioethanol compared to conventional fuel. The mean premium is highest (6% premium) for respondents who received information about positive environmental effects of the advanced fuel. Being female and higher income positively affect WTP. Also higher self-reported knowledge about renewable energy sources and higher valuation of environmental friendliness positively affect WTP for advanced bioethanol.

Reconnecting the Dots for the Payment Service Directive 2 - Compatible Asian Financial Network

Unlike the popular belief, digital transformation mainly gets stymied by legal and regulatory issues related with legacy institutions in Asia rather than technical difficulties. The real challenges triggered by the PSD2 (Payment Services Directive 2) are how the region would overcome the overly fragmented, centralized, and hierarchical legacy framework to allow necessary changes to respond to the digital single market initiatives as promulgated by the European counterpart. The PSD2 is expected to bring about substantial changes in the payment ecosystem by allowing payment service providers to access customers’ accounts and transactions information via API that have been traditionally controlled by banks. This paper suggests an incentive-compatible mechanism design for open collaboration among legacy institutions in the region to help them adapt to the PSD2. As evidenced by case studies in Korea, the Asian equivalent of PSD2 can be implemented and further expanded to create region-wide PCS (payment-clearing-settlement) network by reconnecting the dots of legacy infrastructures. These decentralized, diverse, small payment networks can be further combined with the expanded RTGS-CDS platform to evolve into the next phase of Asian Financial Network.

Assessment of potential environmental risks of transgene flow in smallholder farming systems in Asia: Brassica napus as a case study in Korea

The cultivation of genetically modified (GM) crops has raised many questions regarding their environmental risks, particularly about their ecological impact on non-target organisms, such as their closely-related relative species. Although evaluations of transgene flow from GM crops to their conventional crops has been conducted under large-scale farming system worldwide, in particular in North America and Australia, few studies have been conducted under smallholder farming systems in Asia with diverse crops in co-existence. A two-year field study was conducted to assess the potential environmental risks of gene flow from glufosinate-ammonium resistant (GR) Brassica napus to its conventional relatives, B. napus, B. juncea, and Raphanus sativus under simulated smallholder field conditions in Korea. Herbicide resistance and simple sequence repeat (SSR) markers were used to identify the hybrids. Hybridization frequency of B. napus × GR B. napus was 2.33% at a 2 m distance, which decreased to 0.007% at 75 m. For B. juncea, it was 0.076% at 2 m and decreased to 0.025% at 16 m. No gene flow was observed to R. sativus. The log-logistic model described hybridization frequency with increasing distance from GR B. napus to B. napus and B. juncea and predicted that the effective isolation distances for 0.01% gene flow from GR B. napus to B. napus and B. juncea were 122.5 and 23.7 m, respectively. Results suggest that long-distance gene flow from GR B. napus to B. napus and B. juncea is unlikely, but gene flow can potentially occur between adjacent fields where the smallholder farming systems exist.

Case study in Korea of manufacturing SRF for polyurethanes recycling in e-wastes

Statistics showed that approximately 1,195,000 refrigerator units (116,094 metric tons) were recycled annually in Korea’s formal sector. Although the recycling level for these was satisfactory, collecting and processing polyurethane at recycling centers (RCs) posed several problems, including the risk of fire from the incinerator, the generation of fugitive dust, and the high cost of disposal. The objective of our study is to provide an overview of refrigerator recycling and to introduce polyurethane solid refuse fuel (SRF) manufacturing facilities. These facilities, installed at four regional RCs in Korea, have a capacity of 800 kg/h, a motor of 476 kWh, and cost $664,300 (USD) to construct (criteria two facilities). According to our examination of the physico-chemical properties of SRF product, all results in categories have been satisfied with the quality standards. In terms of finances, RCs can reduce the total disposal cost from $160–175 to $60 by installing facilities, which results in savings of (on average) $180,546 annually. The Metropolitan Electronics Recycling Center, for example, has reduced its costs by $180,880 each year. Their return on investment was calculated to be about 3 years and 8 months (assuming no operating expenses) or 7 years and 4 months (including operating expenses).

Citation Impact of Collaboration from Intra- and Inter-disciplinary Perspectives: A Case Study of Korea

Citation Impact of Collaboration from Intra- and Inter-disciplinary Perspectives: A Case Study of Korea

Characteristics of General Education in Major 3 Universities in the US and a Case Study in Korea

Characteristics of General Education in Major 3 Universities in the US and a Case Study in Korea

Achieving cost-efficient diversification of water infrastructure system against uncertainty using modern portfolio theory

AbstractRecent water-related disasters have shown that not all disrupted events are prevented with water infrastructure systems and current water systems are becoming more vulnerable to disruptions due to the high uncertainty of disrupted events. Many scholars in various fields suggest diversification in the system as a way to respond to the uncertainty. In the real world, however, it is difficult to maximize its use, especially with water infrastructure, due to high costs and incomplete assessment methods. Thus this study attempts to develop a method to quantify cost-effectiveness of diversification using a drought case study in Korea. Modern Portfolio Theory is used to find optimal combinations of water resources infrastructures in terms of diversification. First, expected return and risk of individual water resources for water supply are estimated. Then, expected return and risk of individual portfolios of the water resources are evaluated by varying their shares of 0 to 100%. Finally, non-inferior portfolios are identified and an optimal portfolio for an acceptable return or risk is selected as a solution. Consequently, a portfolio is selected as a desirable one to practically enhance diversification in water infrastructure systems against real world uncertainty in consideration of cost and budget.

Exploring the Effects of HRD to Reduce Turnover Intention and Turnover in Public Sector: Comparative Case Study of Korea, Ethiopia, and Rwanda

Exploring the Effects of HRD to Reduce Turnover Intention and Turnover in Public Sector: Comparative Case Study of Korea, Ethiopia, and Rwanda

Local Spatial Autocorrelation Analysis of 3 Disease Prevalence: A Case Study of Korea

Local Spatial Autocorrelation Analysis of 3 Disease Prevalence: A Case Study of Korea

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground Fault—An Actual Case Study in Korea

A new modeling method for high voltage direct current (HVDC) systems and associated controllers is presented for the power system simulator for engineering (PSS/E) simulation environment. The aim is to improve the estimation of the transient DC voltage and current in the event of an AC line-to-ground fault. The proposed method consists primary of three interconnected modules for (a) equation conversion; (b) control-mode selection; and (c) DC-line modeling. Simulation case studies were carried out using PSS/E and a power systems computer aided design/electromagnetic transients including DC (PSCAD/EMTDC) model of the Jeju– Haenam HVDC system in Korea. The simulation results are compared with actual operational data and the PSCAD/EMTDC simulation results for an HVDC system during single-phase and three-phase line-to-ground faults, respectively. These comparisons show that the proposed PSS/E modeling method results in the improved estimation of the dynamic variation in the DC voltage and current in the event of an AC network fault, with significant gains in computational efficiency, making it suitable for real-time analysis of HVDC systems.

How Does Energy Storage Increase the Efficiency of an Electricity Market with Integrated Wind and Solar Power Generation?—A Case Study of Korea

In recent years, increasing requests to reduce greenhouse gas emissions have led to renewable resources rapidly replacing conventional power sources. However, the inherent variability of renewable sources reduces the reliability of power systems. Energy storage has been proposed as a viable alternative, as it can mitigate the variability of renewable energy sources and increase the efficiency of power systems by lowering peak electricity demand. In this study, we evaluate the benefits of integrating energy storage with combined wind and solar power generation in the Korean power system through using the dynamic optimization method. Realistic wind and photovoltaic solar power generation scenarios were estimated for actual sites. The results show that the wind power-based system benefitted more from energy storage than the combined wind and solar photovoltaic power-based system. This is because the high variability of wind power was reduced when it was combined with solar power. Co-optimization for energy and reserve costs was more beneficial than optimization for energy costs alone, which suggests that the reliability offered by storage is an important cost-saving factor, in addition to the reduction of energy costs by price arbitrage. Finally, the analysis was conducted under various scenarios to determine the validity of energy storage cost effectiveness.

Energy Demand Reduction in the Residential Building Sector: A Case Study of Korea

This study sought to examine ways of reducing energy demands in the residential building sector by measuring energy usage and associated factors in Bundang District. This District represents the first phase of new towns in the Seoul metropolitan region to implement current polices directed at climate change. The majority of residential buildings in this district were constructed between 1991 and 1995, prior to the announcement of the integrated building design criteria directed at saving energy and intensifying thermal transmittance. The proportion of small households was increased by almost 40% from 2000 to 2010. Further, a number of weather records have been broken in the last two decades. These changes are strongly related to energy consumption patterns and trends; however, current polices, acts, and regulations do not sufficiently address these issues. This study suggests building energy-saving strategies that: (i) improve energy performance in existing buildings; (ii) strengthen building design criteria to address climate change issues, especially in relation to design and construction; and (iii) offer a framework to revitalize Korea’s energy-savings policies.

한 · 중 온라인분쟁해결(Online Dispute Resolution) 기술지침과 사례연구

한 · 중 온라인분쟁해결(Online Dispute Resolution) 기술지침과 사례연구

Safe Operation Guidelines for Electronic Toll Collection Systems: A Case Study in Korea

In this paper, we present safe operation guidelines for electronic toll collection (ETC) systems with both ETC booths and manual toll collection (MTC) booths. The guidelines are based on an analysis of vehicle speeds and trajectories that were obtained with a speed gun and a video recording method at six expressway tollgates in Korea. From the analysis results, two risk factors for the operation of the ETC systems were identified: speed differences between ETC-tagged vehicles and other vehicles with respect to locations, and lane changes as a result of entering the wrong lane. The guidelines suggest a method to calculate the safe distance necessary for lane changing and a lane configuration method to reduce accident risks resulting from speed variance. Although the guidelines are based on a case study in Korea, the approach could be useful for operation agencies of other ETC systems in strategic planning to reduce accident risks.

Prospects and Issues in Systemizing Ecological Defense Planning: Case Study of Korea

AbstractThis paper purports to outline the prospects and issues in systemizing ecological defense planning and to assess the progress in the ROK. While the defense sectors in the United States and a number of European states have taken steps toward systemizing ecological measures in recent years, progress in the ROK has been slow. Problems point to not only technical challenges in systemizing ecological measures, but also to the lack of political and bureaucratic facilitation. To examine the problem in question, the paper is divided into four sections. First, the paper will outline the environmental impact of military institutions and their actions. Second, the progress in systemizing ecological measures in the defense sector will be examined. Third, problems in Korea's handling of environmental issues relating to the defense sector will be assessed. Then, in the fourth section, the paper will outline the key steps the ROK must take in systemizing ecological defense planning. The paper concludes that further efforts are needed in conceptualizing and systemizing ecological defense planning to not only shape new norms in the defense sector and their activities, but also to comprehensively address both traditional and non‐traditional security concerns in the region.

Risk-neutral valuation of the non-recourse protection in reverse mortgages: A case study for Korea

Reverse mortgages are increasingly seen as an alternative source of retirement income among Koreans. All reverse mortgage loans in Korea are sold with a non-recourse protection, limiting the borrowers' exposure to house price appreciation risk. This paper performs risk-neutral valuation for the non-recourse protection in the Korean reverse mortgage market. Specifically, we adopt a multivariate DCC-GARCH model that incorporates different forms of correlations between the economic variables. Risk-neutralization is accomplished using the minimum relative entropy method. Our valuation results reveal several limitations of the fee structure currently used by reverse mortgage providers. Recommendations to improve the fee structure are provided.