• Journal of Korea Port Economic Association
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• v.33 no.1
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• pp.61-74
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• 2017

The aim of this study is to analyze informatization competencies of the international ship supply companies at Busan port. This study comprehensively suggests certain issues attributed to the successful implementation of total information management system for ship supply. To achieve this objective, evaluation was undertaken based on the model of the National Competency Standards (NCS). This model consisted of three evaluation areas, including 20 items. Analysis of information competencies of ship supply companies was undertaken using the Importance-Performance Analysis (IPA) method. Survey data was collected from ship supply companies located in the ship supply center at Busan port. Results found that there were significant differences between importance and performance. In addition, overall informatization competency was very low. Thus, in order to ensure successful implementation of total information management system, re-education programs for ICT usage and dedicated support organization are necessary.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.10
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• pp.2457-2464
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• 2015

Distributed Networked Control Systems (NCSs) through wireless networks have a tremendous potential to improve the efficiency of various control systems. In this paper, we define the State Update Interval (SUI) as the elapsed time between successful state vector reports derived from the NCSs. A simple expression of the SUI is derived to characterize the key interactions between the control and communication layers. This performance measure is used to formulate a novel optimization problem where the objective function is the probability to meet the SUI constraint and the decision parameter is the channel access probability. We prove the existence and uniqueness of the optimal channel access probability of the optimization problem. Furthermore, the optimal channel access probability for NCSs is lower than the channel access probability to maximize the throughput. Numerical results indicate that the improvement of the success probability to meet the SUI constraint using the optimal channel access probability increases as the number of nodes increases with respect to that using the channel access probability to maximize the throughput.

• Journal of the Korea Fashion and Costume Design Association
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• v.19 no.3
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• pp.33-47
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• 2017

The purpose of this study is to provide fundamental data for the development of new course on 3D printing in the fashion design department. In order to investigate the perception of and educational needs in 3D printing, the data were collected from 266 students (female 68.8%, male 31.2%) majoring in fashion design aged 18-25 living in the capital area. The results of this survey showed that when investigating perceptions of 3D printing, it was found that 68.8% of answerers had indeed heard of 3D printing. Regarding the path they came to know about 3D printing, mass media such TV was the most frequent answer (54.6%). On the other hand, to the question asking about their intention to take the subject if given, approximately 71% said "Yes". Also, if a modeling class were given, the division that they wanted to explore most in the fashion industry was fashion jewelry. Finally, to the question asking interest in starting a business, 71.1% answered that they had interest. Out of those that answered that they had interest, when questioned about in which field they wanted to start a business, the most frequent answer was fashion online shopping mall. Finally, NCS-based 3D printing courses were suggested in the Fashion Design area. As 3D printing techniques are actively applied to the fashion industry overseas, creative education is needed through the integration of fashion and 3D printing technology by introducing 3D printing related programs in colleges.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.435-435
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• 2016

기후변화에 따라 강우 패턴이 변화하며, 집중호우 발생 빈도의 증가가 예상된다. 이로 인해 저수지 상류에서 유실된 토사는 저수지로 유입하여 정수 처리비용 증가, 1차생산성 감소, 어류폐사, 하천경관 악화 등 다양한 문제를 유발한다. 따라서 위와 같은 탁수 피해 저감을 위해 과학적인 모니터링과 예측, 저수지 운영과 관리기술 개발 등의 대응이 요구된다. 본 연구에서는 극한 탁수사상 발생시 대응 기술의 일환으로 저수지 탁수예측 모델의 신뢰도 향상을 위해, 기존 탁수예측 모형인 CE-QUAL-W2(이하 W2)의 탁수 예측 알고리즘을 개선하고 소양강댐 저수지에 적용하여 그 성능을 평가하였다. 최근 W2모델 3.72 버전까지 출시되었으나, 모델은 단순 침강속도만 고려하여 저수지 밀도 특성을 반영하지 못하고, TSS 모의시 독립침강을 가정하여 응집 침강 및 장기탁수 예측에 취약한 한계점을 가지고 있다. 따라서, 과거 연구내용을 바탕으로 수온에 따른 점성계수 변화(Stoke's), 다중 부유 입자별 침강속도 고려 기능을 추가하였으며, 새롭게 점착성유사의 응집 침강을 고려할 수 있는 기능을 추가하여 모델을 개선하였다. 모델에 점착성 유사 모의 전략은 입자 크기 $63{\mu}m$를 기준으로 비점착성유사(NCS)와 점착성유사(CS)로 구분하고, 비점착성유사는 독립침강, 점착성 유사는 응집침강을 가정하였다. 응집 후 중간 입경의 추정은 Gailani et al(1991)의 식을 사용하였으며, 침강속도 계산 공식은 Hwang and Mehta(1989)식을 적용하였다. 수정된 모델은 소양강댐 운영이후 최대 탁수사상이 발생했던 2006년을 대상으로 기존 탁수해석 결과와 수정된 모델의 모의결과를 실측값과 비교 분석 하였다. Stoke's 식 적용시 기존의 모의결과 대비 AME 평균 23%, RMSE 평균 18%가 개선되는 것으로 나타났으며, Hwang and Metha식 적용시에 SS 모의값이 전반적으로 과소평가되는 것으로 나타났다. 또한, 실측 방류 탁수 농도와 모의값을 비교하여 평가 하였으며, 모의기간인 Julian Day 173~365(192일) 동안 모의 결과의 총 TSS 부하량은 실측값의 약 80%수준을 보였으며, TSS 방류 부하기준 Stoke's 식 적용시 기존 모의대비 오차가 1.3% 개선되는 것으로 나타났다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.31 no.5
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• pp.1031-1043
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• 2021

Recently, the importance of information security has become greater. For this reason, the number of departments related to information security at universities and professional educational institutions is increasing. It is analyzed that the curriculum of such educational institutions has a lot to do with the job competency mentioned in NCS in relation to major subjects. This has the advantage of providing a standardized level of education for each job competency. However from the perspective of students there may be limitations on duplicate curriculum quality of education according to the level of teachers and timely acquisition of necessary elemental skills. In this paper we analyze the curriculum of universities and professional educational institutions and propose a cell-based three-dimensional education model to address the limitations of students. We verified based on the college curriculum that the proposed model can effectively improve its limitations.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.36 no.2
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• pp.43-52
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• 2020

With the advent of the Fourth Industrial Revolution, people need healing. Research in neuroarchitecture shows that people feel happy and stable when working with nature, and patients heal quickly. Therefore, This study aims to quantitatively analyze the colors that help psychological healing in the painting images depicting nature by setting 'Natural Colors' of Biophilic Design as the subject of research. So the purpose of this study was to measure Biophilic Color and to develop Biophilic Color Palette. We extracted Biophilic colors using Impressionist Monet's Landscape painting. After extracting colors using Photoshop Color Picker, we converted RGB color code to NCS color code and Munsell color code. The results of this study were as follows; The ratio of Y was high in the GY-series and YR-series. This is due to the characteristic of impressionism that expresses the change of color by light in close relationship with light. Y is universally considered to be pleasant, representing happiness, sunshine and optimism. Therefore, it is possible to create an environment that helps psychological healing by utilizing the Y-series color palette. Average Blackness was 28. Average Chromaticness was 34.61. The significance of this study is to propose a biophilic color palette that is useful for psychological healing by quantifying the color code of biophilic colors depicted and expressed with adjective images and idiomatic color names. Quantitative and empirical studies on healing colors are needed continuously and should be actively utilized in healing environment planning.

• The Journal of the Korea Contents Association
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• v.22 no.5
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• pp.685-696
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• 2022

This study explores convergence curriculum for design and data science, and applies data science knowledge on undergraduate design classes for designer's data literacy. First, related studies about data literacy education for non-data science major's, and data driven design project cases are explored, then design competency and data competency based on NCS are studied. Then this study developed 3 step design-data convergence curriculum model for designers' data literacy. The curriculum model is applied on case study classes, which are Big data and UX design(2) classes. The learning results and student's feedback of the case study classes are collected and analyzed to prove the design-data convergence curriculum, and the results provide findings and implications of the design-data convergence class case study.

• Journal of Digital Convergence
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• v.16 no.8
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• pp.41-55
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• 2018

This research analyzes how operation system and method of barista private certification implemented in Korea influence on the academic satisfaction of coffee work skills and how such system and method has an effect on the economic effectiveness to utilize for the improvement of work performance skills and for job seeking and changing. For this purpose, author conducted a survey to coffee specialists who had obtained barista certification and who have been working in coffee related industry. The result shows that the operation system and method of coffee certification verification system has a partially positive effect on the academic satisfaction of work performance skills and economic effectiveness. The contents of the coffee related certification verification system as well as specialized and reliable systematic operation of such verification system have an influence on the academic satisfaction of work performance skills and have further influence on the economic effectiveness such as seeking or changing jobs. Therefore, the research on the professionalism and reliability of the qualification verification system must be continued.

• Annals of Clinical Neurophysiology
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• v.8 no.2
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• pp.146-151
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• 2006

Background: Tarsal tunnel syndrome (TTS) is an entrapment neuropathy of the tibial nerve within fibrous tunnel on the medial side of the ankle. The most common cause of TTS is idiopathic. This is a retrospective study to define the electrophysiological characteristics of idiopathic TTS. Methods: We reviewed the medical and electrophysiological records of consecutive patients with foot sensory symptoms referred to electromyography laboratory. Inclusion of patients was based on clinical findings suggestive of TTS. Among them, patients with any other possible causes of sensory symptoms on the foot were excluded. Control data were obtained from 19 age-matched people with no sensory symptoms or signs. Routine motor and sensory nerve conduction study (NCS) including medial plantar nerve (MPN) using surface electrodes were performed. Result: Twenty one patients (13 women, 8 men, 9 unilateral, 12 bilateral) were enrolled to have idiopathic TTS (total 31 feet). Tinel's sign was positive in 16 feet (51.6%) of TTS and four feet (10.5%) in control group. The statistically significant electrophysiological parameter was difference of sensory conduction velocity (SCV) between sural nerve and MPN. Amplitude of sensory nerve action potential and SCV of MPN were not different significantly between idiopathic TTS feet and controls. Conclusion: Bilateral development in idiopathic TTS was more common. Tinel's sign and difference of SCV between sural nerve and MPN may be helpful for the diagnosis of idiopathic TTS.

• KIPS Transactions on Computer and Communication Systems
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• v.7 no.9
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• pp.227-234
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• 2018

Guaranteeing the end-to-end delay deadline is an important issue for quality of service (QoS) of delay sensitive systems, such as real-time system, networked control system (NCS), and cyber-physical system (CPS). Most routing algorithms typically use the mean end-to-end delay as a performance metric and select a routing path that minimizes it to improve average performance. However, minimum mean delay is an insufficient routing metric to reflect the characteristics of the unpredictable wireless channel condition because it only represents average value. In this paper, we proposes a deadline-aware routing algorithm that maximizes the probability of packet arrival within a pre-specified deadline for CPS by considering the delay distribution rather than the mean delay. The proposed routing algorithm constructs the end-to-end delay distribution in a given network topology under the assumption of the single hop delay follows an exponential distribution. The simulation results show that the proposed routing algorithm can enhance QoS and improve networked control performance in CPS by providing a routing path which maximizes the probability of meeting the deadline.