• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2022년도 추계학술대회
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• pp.357-359
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• 2022

Autonomous decision-making is key to safe and efficient marine autonomy, as global marine industry comprises over 90 percent of the world's cargo transportation. Challenges of the real-world validation in the aquatic domain limits the wide-spread of ASVs despite their promising societal impacts. We propose and demonstrate the real-world validation platform and comprehensive algorithm steps. Such a framework will serve as a more explainable and reliable decision-making system of ASVs as well as autonomous vehicles in other domains.

• 복식문화연구
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• 제30권1호
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• pp.16-32
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• 2022

In the intensely competitive global fashion market, the use of cultural elements to enhance design has become increasingly widespread. However, there is a lack of research on challenges and opportunities associated with integrating cultural elements of Minhwa into fashion design. Moreover, diverse approaches to incorporate Korean cultural elements into contemporary fashion designs are still needed. This study aims to reveal the real-world challenges relating to the incorporation of Korean cultural elements, including Minhwa, into fashion design and to clarify the possibility of applying Lin's cultural levels to cultural aspects in accordance with experts' views. To establish a theoretical foundation, the literature review on cultural design and Minhwa studies was conducted. It analyzes Minhwa to gain an understanding of the characteristics associated with different cultural levels. In-depth interviews with fashion industry professionals and Minhwa artists were conducted to ascertain their attitudes toward Minhwa use. The study's major findings were threefold. First, the cultural design facilitates the introduction, promotion, understanding, and maintenance of the culture. Since Minhwa offers rich inspiration linked to Korean culture, Minhwa-related designs can provide new perspectives while still having commercial potential. Second, however, the limitations of existing cultural designs included their being outdated, superficial without interpretation, unsophisticated, or limited. Furthermore, the use of Minhwa is limited since it is difficult to avoid creating superficial and unsophisticated designs in the real world. Third, approaching Minhwa at different cultural levels can promote diverse thinking and reduce the challenges of Minhwa use in design, but the major challenge remains visual expression.

• 국제학술발표논문집
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• The 8th International Conference on Construction Engineering and Project Management
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• pp.278-288
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• 2020

Modular Integrated Construction (MiC) has gained quite momentum as it provides solutions for several problems in the construction sector, particularly in Hong Kong. MiC is converting the building into modules and erecting them easily on site providing various benefits, such as cost and time savings, better quality, lower risk, higher sustainability, less injuries and accidents, etc. The MiC is considered the best alternative to traditional construction approaches in solving the huge housing demand problem in many cities all over the world due to the time-saving privilege. The utilization of MiC is facing a lot of challenges, which are considered obstacles to the wide acceptance of this technique in the construction industry in Hong Kong. This, in turn, has led the interests of the research community to investigate its benefits and challenges aiming at addressing several solutions to harness the benefits of this technique and to tackle these challenges. The present research aims to review the main concept of MiC and to determine the benefits and the challenges of implementing MiC in construction industry. The findings of this research highlight the advantages and limitations of incorporating MiC technique in Hong Kong, which will help the stakeholders to effectively utilize this technique in the construction industry.

• 전자통신동향분석
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• 제36권2호
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• pp.22-31
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• 2021

This report introduces a definition for robot task intelligence and explains the basis of the challenges associated with implementing robot task intelligence in real-world problems. Two fundamental elements of this intelligence, robot manipulation and navigation, are introduced herein. We describe the existing trends and industrial applications of the robot task intelligence in logistics and agricultural automation. Furthermore, as an underpinning technology for this intelligence, we review the existing three-dimensional position estimation techniques and summarize the difficulties associated with applying pure SLAM technology to real-world applications. Finally, we discuss the prospects of the robot task intelligence research and its potential for solving real-world problems.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2015년도 추계학술대회
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• pp.227-229
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• 2015

Training students to use a Marine VHF presents challenges because materials are either out of date or cost prohibitive. It is also difficult to teach in a "real world" setting. This presentation gives a few ideas of how to give practical training and a fair testing method.

• Structural Engineering and Mechanics
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• 제64권4호
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• pp.427-436
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• 2017

Concrete technologists have used ultrasonic pulse velocity test for decades to evaluate the properties of concrete. However, the presented research work focuses on the use of ultrasonic pulse velocity test to study the degradation in steel-concrete bond subjected to increasing loading. A detailed experimental investigation was conducted by testing five identical beam specimens under increasing loading. The loading was increased from zero till failure in equal increments. From the experimentation, it was found that as the reinforced concrete beams were stressed from control unloaded condition till complete failure, the propagating ultrasonic wave velocity reduced. This reduction in wave velocity is attributed to the initiation, development, and propagation of internal cracking in the concrete surrounding the steel reinforcement. Using both direct and semidirect methods of testing, results of reduction in wave velocity with evidence of internal cracking at steel-concrete interface are presented. From the presented results and discussion, it can be concluded that the UPV test method can be successfully employed to identify zones of poor bonding along the length of reinforced concrete beam. The information gathered by such testing can be used by engineers for localizing repairs thereby leading to saving of time, labor and cost of repairs. Furthermore, the implementation strategy along with real-world challenges associated with the application of the proposed technique and area of future development have also been presented.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2023년도 학술발표회
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• pp.172-172
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• 2023

The use of low-cost IoT sensors for flow measurement in open channels has gained significant attention due to their potential to provide continuous and real-time data at a low cost. However, the accuracy and reliability of these sensors in real-world scenarios are not well understood. This study aims to compare the performance of low-cost IoT sensors in the laboratory and real-world conditions to evaluate their accuracy and reliability. Firstly, a low-cost IoT sensor was integrated with an IoT platform to acquire real-time flow rate data. The IoT sensors were calibrated in the laboratory environment to optimize their accuracy, including different types of low-cost IoT sensors (HC-SR04 ultrasonic sensor & YF-S201 sensor) using an open channel prototype. After calibration, the IoT sensors were then applied to a real-world case study in the Dorim-cheon stream, where they were compared to traditional flow measurement methods to evaluate their accuracy.The results showed that the low-cost IoT sensors provided accurate and reliable flow rate data under laboratory conditions, with an error range of less than 5%. However, when applied to the real-world case study, the accuracy of the IoT sensors decreased, which could be attributed to several factors such as the effects of water turbulence, sensor drift, and environmental factors. Overall, this study highlights the potential of low-cost IoT sensors for flow measurement in open channels and provides insights into their limitations and challenges in real-world scenarios.

• 생물정신의학
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• 제19권4호
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• pp.153-158
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• 2012

Understanding of a clinical trial is essential in developing clinical guideline and adopting evidence based practice. In designing and executing clinical trials, following ethical requirements should be considered : social value, scientific validity, fair subject selection, informed consent, favorable risk-benefit ratio, institutional review board, and respect for human subjects. According to the stage of drug development, purpose of trials, accumulated scientific data, clinical trials for drug development are classified as phase 1, 2, 3, and 4. Phases of clinical trials can be overlapped and the judgment of entering into the next phase should be considered highly strategically. In reading, evaluating and interpreting clinical trial reports, various skills and challenges exist. Patient sample composition, trial duration, selection of endpoints, responders and non-responders, placebo effect, patient recruitment, and extrapolation to the real world are the examples of those challenges. Treatment success will come from the well balanced approach of evidence based decision making and consideration of specific single case.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2011년도 한국컴퓨터종합학술대회논문집 Vol.38 No.1(B)
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• pp.41-43
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• 2011

Cyber-Physical Systems are tight integration of computation, networking and physical objects to sense, monitor, and control the physical world. This paper presents a novel architecture that combines two next generation technologies i.e. cyber-physical systems and Cloud computing to develop a ubiquitous healthcare based infrastructure. Through this infrastructure, patients and elderly people get remote assistance, monitoring of their health conditions and medication while living in proximity of home. Consequently, this leads to major cost savings. However, there are various challenges that need to be overcome before building such systems. These challenges include making system real-time responsive, reliability, stability and privacy. Therefore, in this paper, we propose an architecture that deals with these challenges.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2008년도 학술대회 1부
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• pp.829-834
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• 2008

증강 현실(Augmented reality)은 실세계와 가상현실을 연결한다. AR 시스템의 가장 근본적인 목적은 보조 기구를 통하여 실세계에 3D 가상물이 동시에 존재하도록 하여 사용자의 두 세계 사이의 인지력을 개선시키는데 있다. AR 툴킷은 AR 어플리케이션 개발에 널리 이용되고 있다. 그러나 아직 많은 해결해야 할 문제들과 제약 조건들이 있다. 이 논문에서는 AR 툴킷을 이용하여 시스템을 개발할 때 생기는 몇 가지 문제에 대하여 전반적으로 검토 하고자 한다. 그리고 이러한 문제들과 관련된 3D 가상물과 소리를 가지고 있는 AR 트래픽 북이라는 실제 증강 텍스트 북을 소개한다. 이 논문에서는, 우선 가상물체, 렌더링, 카메라 교정, 추적 같은 가장 일반적인 문제들에 접근한다.