• Journal of Korea Society of Digital Industry and Information Management
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• v.8 no.2
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• pp.95-104
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• 2012

In this paper, an estimation of person height and 3D location of a moving person by using the pan/tilt-embedded stereo tracking system is suggested and implemented. In the proposed system, face coordinates of a target person is detected from the sequential input stereo image pairs by using the YCbCr color model and phase-type correlation methods and then, using this data as well as the geometric information of the stereo tracking system, distance to the target from the stereo camera and 3-dimensional location information of a target person are extracted. Basing on these extracted data the pan/tilt system embedded in the stereo camera is controlled to adaptively track a moving person and as a result, moving trajectory of a target person can be obtained. From some experiments using 780 frames of the sequential stereo image pairs, it is analyzed that standard deviation of the position displacement of the target in the horizontal and vertical directions after tracking is kept to be very low value of 1.5, 0.42 for 780 frames on average, and error ratio between the measured and computed 3D coordinate values of the target is also kept to be very low value of 0.5% on average. These good experimental results suggest a possibility of implementation of a new stereo target tracking system having a high degree of accuracy and a very fast response time with this proposed algorithm.

• Health Policy and Management
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• v.26 no.4
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• pp.390-398
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• 2016

Background: This study aims to analyze the impact of levels of health care coverage on the trajectory of self-rated health, comparing the near-poor which tends to be excluded in traditional health care systems with the upper middle class. Methods: The study participants were 3,687 people who sincerely responded questions regarding health care expenditures, unmet medical needs, and self-rated health in the Korea Health Panel data in 2009-2012. Results: The higher health care expenditures and the presence of unmet medical needs were significantly associated with the lower level of self-rated health. However, both factors did not significantly predict the steeper decline in the self-rated health. The results from multiple group analyses showed that health care expenditures and unmet medical needs had greater impact on the near-poor compared to their higher income counterparts. Conclusion: Public health care coverages need to be enhanced as well as reducing health care expenditures and unmet medical needs.

• Journal of Distribution Science
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• v.19 no.10
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• pp.75-86
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• 2021

Purpose: The purpose of this study is to address policy preparation and amendments on regulations in accommodation sharing for resource distribution by fostering better adjustment in a society, since previous studies are rarely investigated in those issues. After conduct exploratory research about laws and regulations of accommodation sharing, this study investigates how effective policy instruments improve trust in accommodation sharing and potential growth by investigating the perceptions of individuals and by applying policymaking procedures. Research design, data and methodology: The data is collected via online survey. Structural equation modeling with confirmatory factor analysis and non-recursive model with multiple regression analysis were applied. Results: The results of this study found that among proposed policy instruments, individuals perceive local ordinances, government publicizing and campaign, trust marks, taxation, penalties, and government controls are effective to build trust in accommodation sharing. Policies geared toward the majority of the public are more effective, while governments should establish a strategic approach as to which policies are introduced in public and which role the government plays in the departments. Conclusions: The results provide policy and managerial implications how to enhance distributional values of accommodation sharing economy with proper preparations and amendments of laws and regulations.

• The Korean Journal of Health Service Management
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• v.13 no.1
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• pp.55-65
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• 2019

Objectives: The purpose of this study is to analyze basic data on socio - demographic characteristics, occupational careers, and desire for employment of job seekers in their Fifties and Sixties using a portal site. Methods: For this research, secondary data were collected by the researcher from 704 job seekers and were statistically analyzed using the SPSS package. Results: The results of the analysis are as follows: Most job seekers want a job that suits their competence and career trajectory, but the reality is that as their age increases, jobs suitable for those in their fifties and sixties are hard to find; thus these job seekers accept simple labor or functional jobs. Conclusions: Differences were found in work conditions such as occupation level, job position, total career years, desired employment type, and expected salary depending on socio - demographic variables. Consequently, improvements should be made for various job searching paths for older adults as well as increasing the accessibility of job searching information.

• International conference on construction engineering and project management
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• 2022.06a
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• pp.945-951
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• 2022

The major objective of this research is to evaluate performance of improved intersections for response time to emergency vehicle preemption. Smart technologies have been introduced to civil infrastructure systems for resilient communities. The technologies need to evaluate their effectiveness and feasibility to confirm their introduction. This research focuses on the performance of emergency vehicle preemption, represented by response time, when smart intersections are introduced in a community. The response time is determined by not only intersections but also a number of factors such as traffic, distance, road conditions, and incident types. However, the evaluation of emergency response has often ignored factors related to emergency vehicle routes. In this respect, this research synthetically analyzes geospatial and incident data using each route of emergency vehicle and conducts before-and-after evaluations. The changes in performance are analyzed by the impact of smart intersections on response time through Bayesian regression models. The result provides measures of the project's performance. This study will contribute to the body of knowledge on modeling the impacts of technology application and integrating heterogeneous data sets. It will provide a way to confirm and prove the effectiveness of introducing smart technologies to our communities.

• The Journal of Industrial Distribution & Business
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• v.15 no.6
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• pp.9-15
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• 2024

Purpose: The primary aim of this study is to investigate the current issues in the leisure sports tourism and propose viable solutions based on a comprehensive review of existing literature. The specific objectives are to: (1) Identify the key challenges facing the leisure sports tourism industry. (2) Analyze the impact of these challenges on the industry's growth and sustainability. (3) Review and synthesize existing research to propose evidence-based solutions. Research design, data and methodology: The preliminary search yielded an extensive list of articles. These articles underwent a rigorous screening process based on their titles and abstracts. The inclusion criteria were: (1) studies focused specifically on the leisure sports tourism industry, (2) empirical research providing data on the identified issues, and (3) peer-reviewed journal articles. Results: The leisure sports tourism industry faces several pressing issues requiring effective solutions to ensure sustainability and growth. This section provides four critical solutions addressing the identified challenges: environmental sustainability, infrastructure and facility management, seasonality and economic impact, and health and safety concerns. Conclusions: The findings highlight several actionable solutions to the current issues faced by the leisure sports tourism industry. This industry can achieve a more stable and sustainable growth trajectory by addressing environmental sustainability, infrastructure and facility management, seasonality, and health and safety concerns.

• Journal of Information Technology Applications and Management
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• v.31 no.1
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• pp.1-9
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• 2024

Predicting the spread of COVID-19 remains a challenge due to the complexity of the disease and its evolving nature. This study presents an integrated approach using the classic SIR model for infectious diseases, enhanced by the chemical master equation (CME). We employ a Monte Carlo method (SSA) to solve the model, revealing unique aspects of the SARS-CoV-2 virus transmission. The study, a first of its kind in Korea, adopts a step-by-step and complementary approach to model prediction. It starts by analyzing the epidemic's trajectory at local government levels using both basic and stochastic SIR models. These models capture the impact of public health policies on the epidemic's dynamics. Further, the study extends its scope from a single-infected individual model to a more comprehensive model that accounts for multiple infections using the jump SIR prediction model. The practical application of this approach involves applying these layered and complementary SIR models to forecast the course of the COVID-19 epidemic in small to medium-sized local governments, particularly in Gangnam-gu, Seoul. The results from these models are then compared and analyzed.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.75-78
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• 2006

이 논문은 이동 차량의 궤적 정보 관리를 통한 물류 관리 시스템을 제안한다. 물류 시스템은 물류 센터에서 차량과 배송 물품의 위치를 지속적으로 모니터링하고, 이와 연관된 서비스를 제공하는 시스템이다. 따라서 물류 차량의 실시간 위치 정보관리가 필수적이다. 제안된 시스템은 기존의 지리 정보와 더불어 실세계 모바일 환경에서 물류 배송 정보의 효율적 관리 기능을 지원한다. 또한 효과적인 물류 이동 경로 관리 및 검색을 위하여 시공간 색인 기법을 적용하였다. 제안된 시스템은 물류 관리 뿐만 아니라 이와 유사한 서비스를 제공하는 차량 추적 시스템, 위치 기반 서비스 등과 같이 모바일 환경에서 실시간으로 변화하는 관리 대상 객체의 위치 정보를 관리하는 분야에 적용 가능하다.

• Journal of the Korea Institute of Military Science and Technology
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• v.12 no.1
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• pp.51-59
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• 2009

This work describes the possibility of ABL(Airborne Laser) applications to the Korean missile defense. The missile defense system is the multilayered defense system that consists of shooters, sensors and BM/C4I. The ABL is the missile defense system of boost phase. It is placing a high energy, megawatt class chemical oxygen iodine laser and highly sophisticated beam control/fire control and battle management systems on a modified Boeing 747-400F aircraft to detect, track and destroy ballistic missiles in their boost phase of flight. This work analysis the ballistic missile's threat of North Korea and the flight trajectory for the SCUD missile that is cut-off by the ABL. From this analysis the possibility of the ABL applications to the Korean missile defense is presented.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.1250-1253
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• 2023

최근 정보 기술의 급격한 발전으로 스마트폰이 우리의 일상 생활에 점점 더 많이 들어오고 있으며, 사용자들은 많은 서비스들을 누릴 수 있게 되었다. 위치 기반 서비스(LBS)의 경우 스마트폰에 탑재된 위치 확인 기능을 통해 음식점 추천, 길찾기 등 개인형 맞춤 서비스를 제공하며, 사용자는 간단한 동의를 통해 자신의 위치를 LBS 서버에 전송하게 된다. 이는 사용자의 개인정보 침해의 요소가 될 수 있으며, 사용자의 민감한 정보가 공개될 수 있다. 따라서 본 논문에서는 사용자의 경로 데이터의 민감 정점을 보호하고, 통계적 질의를 할 때, 절대적으로 개인정보를 보호할 수 있는 방법을 제시한다.