• 한국해양학회지:바다
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• 제8권2호
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• pp.121-131
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• 2003

동해안에서 지난 20년 동안 발생한 월별 안개 발생빈도와 지속시간 분석에 의하면 1월, 2월, 11월, 12월의 안개 발생빈도는 거의 전무함을 알 수 있다. 이 현상은 태백산맥으로부터 동쪽으로 경사를 이루어 복사 안개의 발생이 어려운 지형 특징을 가지고 있기 때문으로 사료된다. 반면에 안개발생빈도의 90%이상을 차지하는 봄, 여름철의 안개 발생 원인은 크게 3가지로 분류된다. 첫 번째는 증기해무로서 오호츠크해 고기압의 확장으로 찬 북동기류가 동해상으로 이류하여 발생한다. 두 번째는 이류해무로서 따뜻한 기단이 상대적으로 찬 해수면 위로 이류하여 냉각, 포화되어 발생한다. 세 번째는 전선해무로써 저기압이 동해상으로 이동하여 수증기가 공급된 상태에서 한랭 전선 후면의 찬공기가 이류하면서 발생한다 한편, 해상풍, 상대습도, 운저고도, 시정 등의 예측과 동해 해역의 수직단면에서 안개 예측이 가능한 해무예측시스템(DUT-METRI)을 구축하여 사례기간의 해무를 모사하였, 위성자료로부터 이를 검증하였다.

• Current Optics and Photonics
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• 제3권5호
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• pp.415-422
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• 2019

Retroreflection of vehicle headlights, as induced by spherical glass beads, is a key optical phenomenon that provides road-surface markings with greatly enhanced visibility, thus better securing a driver's safety in the nighttime as well as in unclear daytime. Retroreflectance of glass beads is a quite sensitive function of their refractive index, so that measurement of the refractive index of glass specifically in the shape of spherical beads needs to be performed within a reasonable uncertainty that is tolerable for road-marking applications. The Becke line method has been applied in assessing refractive index of such glass beads as e.g. an industrial standard in the Republic of Korea; however, the reference refractive-index liquids are not commercially available these days for refractive index greater than 1.80 due to the toxicity of the constituent materials. As such, high-refractive-index glass beads require an alternate method, and in this regard we propose a practically serviceable technique with uncertainty tantamount to that of the Becke line method: Based on comparison of calculated and measured retroreflectance values of commercial glass beads, we discover that their refractive index can be determined with reasonable precision via the retroreflectance measurement. Specifically, in this study the normalized retroreflectance originating from a single glass sphere is computed as a function of refractive index using the Fresnel equations, which is then validated as coinciding well with retroreflectance values measured from actual specimens, i.e. glass-bead aggregates. The uncertainties involved are delineated in connection with radius and imperfections of the glass beads.

• 트랜스-
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• 제8권
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• pp.55-78
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• 2020

대중음악 작곡가가 시도하는 다양한 작곡 방법 중에서도 DAW 소프트웨어를 통한 작곡 방법은 가장 많이 사용되는 방법일 것이다. 특히 K-POP 등의 상업 음악에 있어서 이러한 프로그램을 이용하여 작곡하는 비율은 절대적으로 높은 편이고, 이 과정에서 작곡가는 소프트웨어를 사용하기 전과는 전혀 다른 양상의 창작 과정을 거친다. 음악창작의 과정에서 DAW 소프트웨어의 사용자 인터페이스는 사용 편의성이나 시각적인 측면에서 작곡가의 창작 과정에 지대한 영향을 미친다. 본 연구는 Avid사의 Pro Tools에 나타난 UI에 내재된 특성을 음악창작 과정에서 미치는 실제적인 효과중심으로 분석한다. Pro Tools의 Edit Window에 나타난 UI 요소를 Grid, Track, Slip, Clip, Fade로 분류하여 각각을 모건의 예술 창작 과정의 네 단계이론을 통해 대입하는데, 이로써 DAW 소프트웨어의 시각적인 인터페이스가 어떻게 음악창작 현장에서 세부적으로 작용하는지 밝힐 수 있다.

• STI Policy Review
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• 제5권2호
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• pp.65-95
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• 2014

The recent decades have seen a growing rate of international cooperation in science, technology, and innovation (STI) including in the field of green technologies. However, current approaches to national systems of innovation (NSI) have not kept up with this development. International aspects are rather treated as external conditions within which policymakers operate and respond but not influence. This paper tackles this problem by applying a refined NSI concept that includes an international dimension and complements past frameworks by focusing on those Korean government policies, actors, and activities relevant for the internationalization of STI. Austria and Korea have both formulated differing strategies to acquire international leading positions in the field of innovation and the development of green technologies. In the first step, the paper assesses Korea's international activities within the field of green technologies that transcend national boundaries and establish international connections. The government has still a strong influence on selecting technology areas for strategic funding but our findings show that international STI actors have difficulties in identifying the appropriate point of contact to initiate cooperation or apply for related funding. Second, an external perspective on Korea's international collaborations in the field of green technologies is offered. Austria has tentatively identified the East Asian country as a second-priority cooperation partner for its future STI internationalization activities. Interviews with Austrian stakeholders in the field of green technologies indicate a high interest in cooperation with Korea that is facilitated by a similar business culture based on personal networks. Moreover, researchers and policymakers referred to a shared need of small countries for intelligent decision-making processes regarding potential cooperation partners abroad. However, in order to enhance awareness, visibility and demand for Korean STI cooperation in European countries, more long-term funding programs featuring a more permanent point of contact should be introduced.

• 지역사회간호학회지
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• 제32권3호
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• pp.312-324
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• 2021

Purpose: Tuberculosis is an infectious condition with a high disease burden, and the stigma in patients with tuberculosis causes negative health outcomes. The purpose of this study was to define and clarify the concept of self-stigma among patients with tuberculosis. Methods: The analysis was conducted using Walker and Avant's conceptual approach. Twenty-seven studies met the selection criteria. Results: Self-stigma in patients with tuberculosis can be defined by the following attributes: 1) self-esteem decrement; 2) fear; 3) negative emotions to oneself; 4) social withdrawal; and 5) discrimination. The antecedents identified were 1) inappropriate knowledge of tuberculosis, 2) spread of improper health information through media and social communications, 3) stereotypes and prejudices, 4) visibility due to symptoms appearing, 5) recognizing the risk of infection, and 6) low financial status. The consequences were 1) concealing the disease, 2) treatment delay, 3) poor treatment adherence, 4) poor quality of life, and 5) deterioration in or lack of social activities. Conclusion: The definition and attributes of self-stigma identified by this study can be applied to enhance the understanding of stigma in tuberculosis patients and to improve communications between healthcare providers and researchers. It can also be used to develop theories and measurements related to stigma in patients with tuberculosis.

• Clinical Endoscopy
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• 제51권6호
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• pp.513-526
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• 2018

White light imaging (WLI) may not reveal early upper gastrointestinal cancers. Linked color imaging (LCI) produces bright images in the distant view and is performed for the same screening indications as WLI. LCI and blue laser imaging (BLI) provide excellent visibility of gastric cancers in high color contrast with respect to the surrounding tissue. The characteristic purple and green color of metaplasias on LCI and BLI, respectively, serve to increase the contrast while visualizing gastric cancers regardless of a history of Helicobacter pylori eradication. LCI facilitates color-based recognition of early gastric cancers of all morphological types, including flat lesions or those in an H. pylori-negative normal background mucosa as well as the diagnosis of inflamed mucosae including erosions. LCI reveals changes in mucosal color before the appearance of morphological changes in various gastric lesions. BLI is superior to LCI in the detection of early esophageal cancers and abnormal findings of microstructure and microvasculature in close-up views of upper gastrointestinal cancers. Excellent images can also be obtained with transnasal endoscopy. Using a combination of these modalities allows one to obtain images useful for establishing a diagnosis. It is important to observe esophageal cancers (brown) using BLI and gastric cancers (orange) surrounded by intestinal metaplasia (purple) and duodenal cancers (orange) by LCI.

• 대한영양사협회학술지
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• 제25권3호
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• pp.165-177
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• 2019

This study examined the perception and behavior of fast food restaurant customers toward ordering kiosk nutrition information. Specifically, the influence of nutrition information transparency and information quality on behavioral intention and revisit intention were identified. In addition, the difference in the nutrition information transparency and information quality was analyzed according to the health consciousness of the customers. The study employed a self-administered survey that was distributed both online and offline from November 8~22, 2018. The sample of the study was customers who had experienced ordering from the kiosk in a fast food restaurant in the six months prior to taking the survey. A total of 250 (98.0%) respondents completed the survey, which was used for data analysis. As a result, there was a significant relation between transparency and nutrition information quality (P<0.001). The higher the visibility and inferability of the nutrition information, the better the nutrition information quality. Nutrition information quality has a significant impact on the levels of customer satisfaction and revisit intention (P<0.001). For the differences in the transparency and nutrition information quality by health consciousness of customers, the results indicated that groups with high health consciousness (3.74 or higher) perceived a higher transparency and nutritional information quality than those with a lower health consciousness. These findings can form the basis of a strategy in developing nutrition information of ordering kiosks in restaurants. In addition, it can be applied to academia and industry.

• 대한통합의학회지
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• 제9권1호
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• pp.69-90
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• 2021

Purpose : This study explores unmet medical services within a region for patients admitted to a single medical institution in one region and was to analyze the importance and satisfaction of hospital selection attributes. Through this, we tried to solve the unmet medical needs of patients and provide useful basic data in terms of hospital management in the region. Methods : It were collected to a total of 250 questionnaires for patients admitted to the regional integrative medical hospital. However, 232 samples were used for the final analysis, excluding 18 copies not reported in good faith. For the analysis, first, demographic frequency analysis of inpatients and inpatients was performed, and second, characteristics of patients, including frequent disease receiving treatment, were analyzed. Next, descriptive statistics analysis was conducted on unmet medical service intentions. In terms of hospital selection attribute, the items of continuity maintenance (I quadrant), priority visibility (II quadrant), low priority (III quadrant), and excessive effort (IV quadrant) were derived using the IPA (importance-performance analysis) matrix technique. Results : The derived results were classified by item and area. In the priority administration area, it was the reputation and recognition of medical institutions and the service area of medical institutions. In the case of items, there were 6 items including the importance of surgery and medical expenses, and diet at hospitalization. 1) Conclusion : Thus a result of this study, resources are efficiently allocated to priority correction areas with high importance but low satisfaction and circulatory medical treatment is performed in the departments required by patients who use medical care and, various methods, such as preparing a policy to support medical expenses, should be sought.

• 전기전자학회논문지
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• 제26권3호
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• pp.401-407
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• 2022

최근 자율주행 자동차를 구현하기 위해 카메라 영상을 통해 객체 및 차선을 인식하여 자율주행하는 영상처리 기술이 연구되고 있다. 안개는 카메라 촬영 영상의 가시성을 떨어뜨리기 때문에 자율주행 자동차 오작동의 원인이 된다. 이를 해결하기 위해 카메라에 실시간 처리가 가능한 안개 제거 기능을 적용하는 것이 필요하다. 따라서 본 논문에서는 성능이 우수한 Sim의 안개 제거방법을 실시간 처리가 가능한 하드웨어로 구현한다. 제안하는 하드웨어는 Verilog HDL을 사용하여 설계하였고, Xilinx사의 xc7z045-2ffg900을 Target device로 설정하여 FPGA 구현하였다. Xilinx Vivado 프로그램을 이용한 논리합성 결과 4K(4096×2160) 고해상도 환경에서 최대 동작 주파수 276.932MHz, 최대 처리 속도 31.279fps를 가짐으로써 실시간 처리 기준을 만족한다.

• Advances in aircraft and spacecraft science
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• 제9권5호
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• pp.449-462
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• 2022

Space-telescopes placed in the Sun-Earth second Lagrange point (L2) observe the sky following a scan strategy that is usually based on a spin-precession motion. Knowing which regions of the sky will be more observed by the instrument is important for the science operations and the instrument calibration. Computing sky observation parameters numerically (discretizing time and the sky) can consume large amounts of time and computational resources, especially when high resolution isrequired.This problem becomesmore critical if quantities are evaluated at detector level instead of considering the instrument entire Field of View (FoV). In previous studies, the authors have derived analytic solutions for quantities that characterize the observation of each point in the sky in terms of observation time according to the scan strategy parameters and the instrument FoV. Analytic solutions allow to obtain results faster than using numerical methods as well as capture detailed characteristics which can be overseen due to discretization limitations. The original approach is based on the analytic expression of the instrument trace over the sky. Such equations are implicit and thusrequiresthe use of numeric solversto compute the quantities.In this work, a new and simpler approach for computing one ofsuch quantities(mean observation time) is presented.The quantity is first computed for pure spin motion and then the effect of the spin axis precession is incorporated under the assumption that the precession motion is slow compared to the spin motion.In this sense, this new approach further simplifies the analytic approach, sparing the use of numeric solvers, which reduces the complexity of the implementation and the computing time.