• 한국정보통신학회논문지
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• 제9권5호
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• pp.965-972
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• 2005

본 논문에서는 멀티미디어 Ad Hoc 무선 LAM(AWLAN)을 위한 새로운 자원 관리 방안으로 분산채널 할당 프로토롤(Distributed Channel Allocation Protocol, DCAP)을 제안한다 이 방안은 QoS (Quality-of-Service)를 보장하는 분산적 자원 관리를 OFDM-CDMA(Orthogonal Frequency Division Multiplexing-Code Division Multiple Access) 채널 구조 위에 구현한 것이다. MPEG 트래픽에 대한 성능평가 결과 DCAP는 광대역 무선 접근(Broadband Wireless Access, BWA) 형 물리구조 기반에서의 멀티미디어 서비스를 지원하는 AWLAN을 위한 좋은 자원 관리 방안임이 판명되었다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.22.1-22
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• 2001

In this paper we present Multiple-Channel Active Noise Control[ANC] system by employing Independent Component Analysis[ICA] and Adaptive Network Fuzzy Inference System[ANFIS]. ICA is widely used in signal processing and communication and it use prewhiting and appropriate choice of non-linearities, ICA can separate mixed signal. ANFIS controller is trained with the hybrid learning algorithm to optimize its parameters for adaptively canceling noise. This new method which minimizes a statistical dependency of mutual information(MI) in mixed low frequency noise signal and there is no need to secondary path modeling. The proposed implementations achieve more powerful and stable noise reduction than Filtered-X LMS algorithms which is needed for LTI assumption and precise secondary error

• Journal of Digestive Cancer Research
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• 제3권1호
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• pp.21-25
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• 2015

Gastric neuroendocrine tumors (GNETs, also known as gastric carcinoids) are rare form of hormone-secreting neoplasms that present with varied clinical syndromes. There are four types of GNETs based on size, proliferation, localization, differentiation, and hormone production. Type I GNET is related to autoimmune atrophic gastritis and hypergastrinemia. Type II GNETs are related to multiple endocrine neoplasia (MEN)-1, Zollinger-Ellison syndrome and hypergastrinemia. Type 3 GNETs are not associated with any background pathology, and type 4 GNETs are poorly differentiated tumors. The most useful diagnostic and prognostic marker for gastrointestinal NETs is plasma chromogranin A (CgA) levels. Endoscopic ultrasound is the method of choice to determine tumor size and depth of infiltration. For optimal management, the type, biology, and stage of the tumor must be considered. Here, we provide a comprehensive and up-to-date review of GNETs.

• 공학교육연구
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• 제18권5호
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• pp.51-58
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• 2015

This research was conducted to assess the effects of an engineering education accreditation program devised by the University of Seoul on higher education outcomes by comparing and analyzing the evaluation results of engineering accredited students (31) and those who are not accredited (47) with the OECD AHELO (Assessment of Higher Education Learning Outcomes) in 2013. The AHELO assessment tool consisted of 25 multiple-choice questions which evaluated generic skill-learning outcomes, also using contextual surveys to establish the students' backgrounds. The results were evaluated statistically. In the results from the multiple-choice exam for generic skill learning outcomes, accredited students scored 1.35 points higher than non-accredited students. Secondly, according to the contextual survey related to students' university education experience, such as lectures, seminars, group projects, and online tutoring, it was found that accredited students were provided more activities in seminars and group projects. Moreover, for class activities, more of these were provided to accredited students, especially in the areas of assortment-structuralization and teamwork-based activities. Thirdly, according to the contextual survey results related to participation in class, specifically regarding asking questions and participating in discussions, interacting with the professor, and opportunities for study time, there were no recognizable differences between accredited and non-accredited students, However, while accredited students at least had opportunities to gain experience in most areas, there were some areas for which education resources were not provided to non-accredited students. Therefore, for the University of Seoul, our results imply that accredited students may show better performance in the areas of academic accomplishment and in their educational environment as compared to non-accredited students. These results demonstrate that the engineering education accreditation program positively contributes to employment competitiveness while also improving the necessary global standards of higher education outcomes.

• 말소리와 음성과학
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• 제4권3호
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• pp.137-142
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• 2012

The aim of this study is to investigate the usefulness of the multiple-choice name matching test (MC-NMT) in adults with aphasia by comparing the Korean version of the Boston Naming Test (K-BNT) and subsets of the Korean version of the Western Aphasia Battery (K-WAB). Thirty-nine patients who suffer from aphasia participated in the study. All patients were examined by the K-BNT, MC-NMT and K-WAB. The MC-NMT consisted of the 30 original BNT object stimuli which were presented with four response choices (written words) with similar frequency, including one correct and three incorrect responses. Cards containing the drawings were presented to the patient one at time. An item was passed if the patient chose the correct response within 10 seconds. We subdivided two groups into a total group and a low K-BNT group (at and below 15 points). We evaluated the correlation between the K-BNT, MC-NMT score and production, naming, repetition, comprehension, reading and writing scores in subsets of the K-WAB. There was a highly positive correlation between the K-BNT score and naming score of the K-WAB in total patients. However, the MC-NMT was highly correlated with reading scores in the K-WAB. In low score K-BNT patients, the K-BNT strongly correlated with production, naming and repetition scores of the K-WAB. These findings mean that K-BNT reflects motor language function. However, the MC-NMT was strong correlated comprehension, reading and writing of the K-WAB. This finding reflects sensory language function. We suggest that the combination of K-BNT and newly developed MC-NMT will be useful to evaluate speech functions in aphasic patients.

• 한국산학기술학회논문지
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• 제15권6호
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• pp.3609-3615
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• 2014

본 연구의 목적은 선다형 적성검사에서의 선택지 위치, 선택지 지문 길이 및 문항 진술 유형에 따른 문항 특성차이를 알아보는데 있다. 이를 위해 H대학의 적성평가 수시 전형 사전검사로 개발된 적성평가 80문항을 전국 80개 고등학교에 재학중인 고등학교 3학년생 3120명(인문계열-1650명, 자연계열-1467명)에게 실시하였다. 분석결과, 정답이 외곽치(1, 4번 선택지)보다 중앙치(2, 3번 선택지)에 위치할 경우 추측도가 높았고, 옳은 것을 고르는 문항보다 옳지 않은 것을 고르는 문항에서 변별도가 더 높았다. 또한 선택지의 길이가 길수록 선택지 선호도가 높은 것으로 나타났다. 마지막으로 선택형 적성검사에 대한 새로운 접근과 관련해서 본 연구의 의의와 추후 연구 방향을 논의하였다.

• 한국콘텐츠학회논문지
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• 제16권9호
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• pp.694-701
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• 2016

시험지와 별도로 제공되는 OMR 답안지와는 달리 시험지의 각 문항에 직접 OMR 답안 마킹 양식을 제공하고 스마트폰을 이용하여 각 문항별로 마킹된 답을 자동 인식하고 해설 기능까지 제공하면 자율학습 및 스마트러닝 관점에서 유용하게 활용될 수 있을 것이다. 본 논문에서는 시험지 문항별로 제공되는 OMR 답안 항목에 마킹된 답을 스마트폰으로 자동 인식할 수 있는 어플리케이션 구현 방법을 제안하였다. OMR 답안 문항마다 QR코드를 배치하여 암호화된 답안 정보를 제공하고 답안의 위치를 추정할 수 있는 기준점으로 활용할 수 있도록 하였다. 시험지의 각 문항별 OMR 답안 영역을 추출하고 마킹된 답을 인식한 다음 정답과 비교할 수 있도록 하였다. 제안한 알고리즘을 스마트폰에 구현한 다음 다양한 크기와 방향으로 촬영한 문항별 OMR 답안 영상에 대해 인식 실험을 해 본 결과 우수한 인식 성능을 얻을 수 있었다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권2호
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• pp.489-494
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• 2015

Background: Once limited with face-to face courses, health education has now moved into the web environment after new developments in information technology This study was carried out in order to give training to the university academic and administrative female staff who have difficulty in attending health education planned for specific times and places. The web-supported training focuses on healthy diet, the importance of physical activity, damage of smoking and stress management. Materials and Methods: The study was carried out in Sakarya University between the years 2012-2013 as a descriptive and quasi experimental study. The sample consisted of 30 participants who agreed to take part in the survey, filled in the forms and completed the whole training. The data were collected via a "Personel Information Form", "Health Promotion Life-Style Profile (HPLSP)", and "Multiple Choice Questionnaire (MCQ). Results: There was a statistically significant difference between the total points from "Health Promotion Life-Style Profile" and the total points from the sub-scale after and before the training (t=3.63, p=0.001). When the points from the multiple choice questionnaire after and before training were compared, it was seen that the average points were higher after the training (t=8.57, p<0.001). Conclusions: It was found that web-supported health training has a positive effect on the healthy living behaviour of female staff working at a Turkish university and on their knowledge of health promotion.

• 정보교육학회논문지
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• 제11권3호
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• pp.349-358
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• 2007

본 연구는 개인의 일생에서 중요한 의사결정의 하나인 진로선택에 도움을 주기 위한 웹기반 진로안내 시스템을 개발 하는 것이다. 초등학교에서의 진로교육은 직업선택에 필요한 초보적인 지식, 일에 대한 기본적인 태도와 가치관의 형성이 목적이므로 개인의 적성과 흥미를 고려한 다양한 직업의 종류에 대한 안내가 중요하다. 그러나, 기존의 연구는 대부분 검사결과를 알려주는 수준에 머물려 있다. 따라서, 본 연구는 잠정적 진로선택 단계에 있는 초등학교 고학년에게 적합한 진로발달검사를 실시하고, 결과에 맞는 직업의 종류를 안내하는 웹기반 진로안내시스템을 개발하였다. 본 진로안내시스템은 검사결과를 알려주는 것에서 발전하여 검사결과 값을 우수지능 3개로 제시하여 검사자의 학습욕구를 자극하였다. 그리하여 학습자가 자신의 우수한 지능영역을 알고 이 지능과 관련된 직업의 종류와 하는 일에 대해 효율적으로 학습하고, 자신의 진로에 대한 인식과 진로선택의 바른 자세를 배울 수 있을 것으로 기대된다.

• 한국수학교육학회지시리즈A:수학교육
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• 제56권1호
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• pp.63-80
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• 2017

By analysing the examination papers from third grade high school students, we classified the errors occurred in the problem solving process of high school 'Geometry and Vectors' into several types. There are five main types - (A)Insufficient Content Knowledge, (B)Wrong Method, (C)Logical Invalidity, (D)Unskilled Expression and (E)Interference.. Type A and B lead to an incorrect answer, and type C and D cannot be distinguished by multiple-choice or closed answer questions. Some of these types are classified into subtypes - (B1)Incompletion, (B2)Omitted Condition, (B3)Incorrect Calculation, (C1)Non-reasoning, (C2)Insufficient Reasoning, (C3)Illogical Process, (D1)Arbitrary Symbol, (D2)Using a Character Without Explanation, (D3) Visual Dependence, (D4)Symbol Incorrectly Used, (D5)Ambiguous Expression. Based on the these types of errors, answers of each problem was analysed in detail, and proper ways to correct or prevent these errors were suggested case by case. When problems that were used in the periodical test were given again in descriptive forms, 67% of the students tried to answer, and 14% described flawlessly, despite that the percentage of correct answers were higher than 40% when given in multiple-choice form. 34% of the students who tried to answer have failed to have logical validity. 37% of the students who tried to answer didn't have enough skill to express. In lessons on curves of secondary degree, teachers should be aware of several issues. Students are easily confused between 'focus' and 'vertex', and between 'components of a vector' and 'coordinates of a point'. Students often use an undefined expression when mentioning a parallel translation. When using a character, students have to make sure to define it precisely, to prevent the students from making errors and to make them express in correct ways.