• 디지털콘텐츠학회 논문지
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• 제18권2호
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• pp.267-274
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• 2017

최근 패션, 뷰티 업계를 중심으로 스마트 미러를 도입한 매장을 선보이는 등 IoT기술을 적용하고자 다양한 노력이 시도되고 있다. 스마트 미러는 거울을 통해 모습을 비춰볼 수 있으면서 거울 뒤에 부착된 화면을 통해 원하는 내용을 디스플레이 할 수 있어 패션, 뷰티, 헬스 케어 등 다양한 산업 분야에 적용이 가능하다. 본 논문에서는 이러한 스마트 미러의 특성을 이용하여 구술 능력이 퇴화되어 발음이 부정확한 청각 장애인이 타인의 도움 없이 스스로 발음 교정 학습을 할 수 있도록 하는 학습 시스템을 제안하고자 한다. 제안된 시스템에서는 임베디드 시스템에서 적용 가능한 효과적인 립 리딩 기법을 제안하여 기존에 검증된 발음 교정용 데이터와 연동하여 학습 효율을 높였다.

• Journal of Korean Neurosurgical Society
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• 제45권4호
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• pp.219-223
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• 2009

Objective : Functional magnetic resonance imaging (fMRI) is frequently used to localize language areas in a non-invasive manner. Various paradigms for presurgical localization of language areas have been developed, but a systematic quantitative evaluation of the efficiency of those paradigms has not been performed. In the present study, the authors analyzed different language paradigms to see which paradigm is most efficient in localizing frontal language areas. Methods : Five men and five women with no neurological deficits participated (mean age, 24 years) in this study. All volunteers were right-handed. Each subject performed 4 tasks, including fixation (Fix), sentence reading (SRI. pseudoword reading (PR), and word generation (WG). Fixation and pseudoword reading were used as contrasts. The functional area was defined as the area(s) with a t-value of more than 3.92 in fMRI with different tasks. To apply an anatomical constraint, we used a brain atlas mapping system, which is available in AFNI, to define the anatomical frontal language area. The numbers of voxels in overlapped area between anatomical and functional area were individually counted in the frontal expressive language area. Results : Of the various combinations, the word generation task was most effective in delineating the frontal expressive language area when fixation was used as a contrast (p<0.05). The sensitivity of this test for localizing Broca's area was 81 % and specificity was 70%. Conclusion : Word generation versus fixation could effectively and reliably delineate the frontal language area. A customized effective paradigm should be analyzed in order to evaluate various language functions.

• 한국항공운항학회지
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• 제23권3호
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• pp.18-27
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• 2015

Many studies have shown that having perception of spatial information is important for air traffic control officer (ATCO) since it helps them understand the current situation and predict the situation it leads to. However, little or no research has been done to investigate if there is any difference at the levels of expertise in perceiving spatial information and predicting a prospective situation. This study investigates the difference between expert and novice ATCO groups in how accurately each group of ATCO perceive spatial information such as position, altitude, speed, and flying direction, and predicting such information they will encounter shortly. In completing a task to watch the movement of airplanes displayed on the computer monitor as a blip, the participants were asked to predict the position, speed, and the altitude of the aircraft in a minute by marking on the sector map. The results show that the expert group performed better in accuracy and had tendency to overestimate on position and altitude; however, no significant difference was found between the two groups in terms of reading a flying direction. Therefore reading a flying direction may not be a reliable indicator to judge expertise of ATCO. But the expert group shows better predicting performance by perceiving spatial information such as airplane's position and altitude with feeling on time. The study suggests that it is important to enhance perceptive skills in ATCO training in improving their expertise in predicting accuracy traffic situation, preventing from air collision, and improving productivity for more efficient air traffic flow. A further study on the relationship between the perception of spatial information and the sense of time in predicting future information and effectiveness as an independent factor would contribute to providing more insights into expertise of ATCOs.

• 한국산학기술학회논문지
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• 제7권6호
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• pp.1100-1105
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• 2006

칼라코드는 획득된 영상에서 칼라의 심각한 왜곡 때문에 그 응용 확장에 어려움이 있었다. 칼라 인식에서 칼라 왜곡의 영향을 줄이기 위해서는 규칙적으로 샘플링된 몇 개의 화소들을 이용하기 보다는 가능한한 각 칼라 영역에서 많은 화소들을 통계적으로 처리하는 것이 더 바람직하다. 이를 위해서는 일반적으로 에지 검출이 필요한 분할이 필요하다. 그러나, 칼라코드에서 에지들은 분할을 불완전하게 만드는 지퍼 효과나 반사와 같은 다양한 왜곡에 의해 끊어질 수 있고, 에지 연결 또한 어려운 처리 과정이다. 본 논문에서는 칼라 인식에서 칼라 왜곡의 영향을 줄이기 위한 좀 더 효과적인 방법은 분할을 위한 정확한 에지 검출을 배제하는 방법으로 k-평균 클러스트링 알고리즘을 적용하였다. 또한, 칼라코드 검출에서 6개의 안전한 칼라와 그레이 성질 모두 이용하였다. 실험은 4M-화소 크기의 야외영상 144장에 대해 수행되었다. 제안한 방법은 테스트 영상에 대해서 100%의 칼라코드 검출율을 나타내었고, 검출된 코드에 대해서는 99% 이상의 평균 칼라 인식 정확도를 보였다. 여기서 가장 높은 정확도를 보인 캐니 에지 검출법을 사용한 경우 91.28%로 나타났다.

• 한국중재학회지:중재연구
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• 제20권2호
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• pp.3-26
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• 2010

In 2006, the UNCITRAL Working Group II started a new project on the revision of the UNCITRAL Arbitration Rules of 1976. Ever since that time, 9 sessions of the Working Group II were devoted to the discussions on such topic. The Arbitration Rules has been acknowledged to be used for settling international disputes involving various disputing parties. In recent years, many treaty-based arbitrations have been subject to the Arbitration Rules. This article focuses on the discussions made in the 52nd session of the Working Group II where the third reading of the revised draft of the Arbitration Rules was completed except for a few provisions. Among the draft rules, the delegations were hardly able to reach an agreement with regard to Articles 2(2), 34(2), 41(3), (4), and (6). It is expected that those provisions would be agreed in the coming 43rd plenary session of the UNCITRAL. The use of the Arbitration Rules is dependent on the agreement by the disputing parties. It is not like the UNCITRAL Model Law on International Commercial Arbitration which was adopted in Korean legal system in 1999. However, the proper functioning of arbitration rules is essential for the efficient and successful operation of the arbitration system in a particular country. That is the reason why we should keep close attention on the discussions of the UNCITRAL with regard to the revision of the Arbitration Rules.

• 한국멀티미디어학회논문지
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• 제19권11호
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• pp.1837-1851
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• 2016

Newspaper reader mobile applications using text-to-speech (TTS) function enable blind people to read newspaper contents. But, tables cannot be easily read by the reader program because most of the tables are stored as images in the contents. Even though we try to use OCR (Optical character reader) programs to recognize letters from the table images, it cannot be simply applied to the table reading function because the table structure is unknown to the readers. Therefore, identification of exact location of each table cell that contains the text of the table is required beforehand. In this paper, we propose an efficient image processing algorithm to recognize all the cells in tables by identifying columns and rows in table images. From the cell location data provided by the table column and row identification algorithm, we can generate table structure information and table reading scenarios. Our experimental results with table images found commonly in newspapers show that our cell identification approach has 100% accuracy for simple black and white table images and about 99.7% accuracy for colored and complicated tables.

• 정보처리학회논문지D
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• 제17D권3호
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• pp.185-192
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• 2010

센서 네트워크 환경에서는 각 센서는 정의된 샘플링 주기에 따라서 외부 환경을 측정하고 측정된 값을 기지국으로 전송한다. 따라서, 샘플링 주기는 대역폭, 전력량 등 센서들의 중요 자원의 소비에 지대한 영향을 끼친다. 본 논문에서는 측정값 특성에 따라서 센서의 샘플링 주기를 조절하는 새로운 적응적 샘플링 기법을 제안한다. 제안하는 기법은 KF (Kalman-Filter)에 기반하여 미래의 측정값을 예측한다. 그리고, 실측값과 예측값의 차이에 따라서 센서 측정값들의 중요도를 파악하고 이에 따라서 샘플링 주기를 변화시킨다. 실험에서 제안하는 기법의 효과성을 보였다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 춘계학술대회
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• pp.752-754
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• 2016

전력은 전체 에너지 대비 점유율이 지속적으로 증가하고 있으며, 이에 따른 효율적 수요 관리 및 부가 가치 창출을 위한 방안으로 원격 검침 시스템이 도입되었다. 하지만 원격 검침 시스템을 사용하면, 사이버 공격 및 해킹과 같이 다양한 외부 공격으로 위험이 존재한다. 이를 미리 예방하거나 좀 더 안전하게 이용될 수 있는 방안 모색이 시급하다고 사료된다. 이 논문에서는 원격검침 시스템의 현 보안 인증 기술의 연구 동향 및 이슈를 짚어보고자 한다.

• 한국전기전자재료학회논문지
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• 제29권3호
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• pp.141-146
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• 2016

The AMR(automatic meter reading) system has been increasingly and widely used for its efficient and intelligent management, which is a technology that automatically collects consumption data from a water meter or energy metering device. The digital meter instead of the mechanical meter should be used in the system. Up to now, various types of sensor to measure the water flow rate have been used in the digital water meter, for example, reed switch, photo IR approximate sensor, ultrasonic sensor, electromagnetic sensor, etc. In this paper, a new sensing technology, where a variable capacitor and digital circuit were used for sensing the water flow rate, was proposed. The circuit was designed and verified by Pspice simulation. And a PCB board for the circuit was fabricated. After then, a prototype of digital water meter using a variable capacitor to measure the water flow rate was fabricated. The function tests of the fabricated digital water meter were performed, and it was found that the meter worked properly. Since the new technology has much better properties in terms of cost and power consumption compared to conventional technologies, it should be one of the major digital water meter technologies in the future.

• 대한인간공학회지
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• 제32권3호
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• pp.253-258
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• 2013

Objective: This study investigates user performance and user perceptions of dynamic Chinese text displays (Leading display and RSVP display) when users search for target information. Background: Today, information searching with dynamic displays is widely used in TV programs, on Internet advertisements, for traffic information systems, and more. Method: A human factors experiment was conducted to compare both displays. Eighteen subjects participated in evaluating two simulated interfaces for the leading display and the RSVP display. Results: The results show that the leading display was better in terms of search time and certain subjective measurements (Easiness, frustration, anxiety). The latter results are consistent with the conclusions of other research efforts showing that dynamic displays are more effective and efficient when reading information. Conclusion: The leading display is more useful for Chinese users in terms of both information searching and information reading. Application: This study helps design dynamic displays written in Chinese texts.