• 대한임베디드공학회논문지
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• 제4권2호
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• pp.69-78
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• 2009

Localization is a very important technique for the mobile robot to navigate in outdoor environment. In this paper, the development of the sensor fusion algorithm for controlling mobile robots in outdoor environments is presented. The multi-sensorial dead-reckoning subsystem is established based on the optimal filtering by first fusing a heading angle reading data from a magnetic compass, a rate-gyro, and two encoders mounted on the robot wheels, thereby computing the dead-reckoned location. These data and the position data provided by a global sensing system are fused together by means of an extended Kalman filter. The proposed algorithm is proved by simulation studies of controlling a mobile robot controlled by a backstepping controller and a cascaded controller. Performances of each controller are compared.

• Journal of Information Processing Systems
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• 제16권2호
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• pp.447-459
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• 2020

After reading a document, people construct a concept about the information they consumed and merge multiple words to set up keywords that represent the material. With that in mind, this study suggests a smarter and more efficient keyword extraction method wherein scholarly journals are used as the basis for the establishment of production rules based on a concept information of words appearing in a document in a way in which author-provided keywords are functional although they do not appear in the body of the document. This study presents a new way to determine the importance of each keyword, excluding non-relevant keywords. To identify the validity of extracted keywords, titles and abstracts of journals about natural language and auditory language were collected for analysis. The comparison of author-provided keywords with the keyword results of the developed system showed that the developed system was highly useful, with an accuracy rate as good as up to 96%.

• 대한디지털의료영상학회논문지
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• 제16권2호
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• pp.25-29
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• 2014

The full-field digital mammography (FFDM), which has been known as a digital breast imaging system, carries out more outstanding performance than the screen-film mammography in overall image quality, skin & nipple, description of pectoral muscle and expression of micro-calcification. Thus, in this thesis, I perform experiments for both the enhancement of image quality and accurate estimation of the result in question, when detecting the very tiny-sized lesions in mammography. The image of digital breast X-rays is the important diagnostic tool for detecting early breast cancer and micro calcification lesion. The experiment of how much compression rate has an effect on the result of diagnosis in the case of microcalcification lesion, with JPEG2000 40:1 compression and over 50% enlargement led to obscure or definitely unacceptable diagnostic results is performed. And in another study of assessment of PSNR degree. I recognized the importance of standardized management system in mammography, where not to mention the accurate reading of the image has the most crucial role in diagnosis

• 산업경영시스템학회지
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• 제18권36호
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• pp.71-82
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• 1995

The readability and the visuability are very significant when the letters or figures are displayed as static visual information. Not only is the beauty of the body type character(small letters) important but the display type character(large letters) should also be read easily, quickly and precisely. The issue regarding the readability in terms of perception of information has been raised continuously for all kinds of small signage and billboard, etc., which are written in display type within our everyday life. Among the various kinds of small signage and billboards the car licence plate is well known. Among all the possible factors that would have made an impact on the readability of licence plate, this paper focused on the effects of arrangement of character(letters and figures) and contrast of colors for the readability of licence plate using the within-subject analysis. The statistical analysis results in error reading rate, the character arrangement were significant but the color contrast(green/white, white/green, blue/white, white/blue, black/yellow) was not, No interaction was found.

• International Journal of Knowledge Content Development & Technology
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• 제6권2호
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• pp.109-147
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• 2016

This study comprehensively analyzed domestic and foreign literature related to the value and impact of libraries on education, social behavior and economic conditions, developed a survey to investigate the librarians' perception of the libraries' value and impact, and accordingly investigated the perception of librarians according to the types of libraries in which they worked, public versus university. The results showed that the impact is greatest on education and literacy with a mean score of 3.98, followed by their social impact with 3.67 and their economic impact with 3.46. When subordinate items were analyzed it was found that the librarians perceived that the role that libraries are playing in the education area is expanding and their impact on reading and literacy is becoming greater and greater. Libraries were viewed as essential elements for education and the education system. When the difference in perception related to the impact of libraries was compared by types of libraries, the librarians in public libraries tended to rate their facilities higher than the librarians working in universities on most of the items.

• Journal of information and communication convergence engineering
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• 제20권1호
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• pp.58-64
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• 2022

Breast ultrasonic reading is critical as a primary screening test for the early diagnosis of breast cancer. However, breast ultrasound examinations show significant differences in diagnosis based on the difference in image quality according to the ultrasonic equipment, experience, and proficiency of the examiner. Accordingly, studies are being actively conducted to analyze the texture characteristics of normal breast tissue, positive tumors, and malignant tumors using breast ultrasonography and to use them for computer-assisted diagnosis. In this study, breast ultrasonography was conducted to select 247 ultrasound images of 71 normal breast tissues, 87 fibroadenomas among benign tumors, and 89 malignant tumors. The selected images were calculated using a statistical method with 21 feature parameters extracted using the gray level co-occurrence matrix algorithm, and classified as normal breast tissue, benign tumor, and malignancy. In addition, we proposed five feature parameters that are available for computer-aided diagnosis of breast cancer classification. The average classification rate for normal breast tissue, benign tumors, and malignant tumors, using this feature parameter, was 82.8%.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.267-268
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• 2021

Since the first BIM development outline was issued in 2011, China has initially tried to adopt BIM in the construction industry. After the BIM guide was issued in 2017, China has officially entered the era of building informatization in the construction industry. Through the statistical data of BIM application reports in China's construction industry from 2014 to 2020, this paper concludes that China has made great progress in the popularization rate of BIM, but has little effect in the adoption in actual projects. Through the reading and analysis of relevant documents in China, 13 obstacle factors for BIM technology adoption in construction enterprises are preliminarily defined.

• 한국초등과학교육학회지:초등과학교육
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• 제23권1호
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• pp.27-36
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• 2004

This paper aims to examine how well university students, who are going to be primary school teachers, understand the International System of Units (SI), focusing on seven basic units such as 'm', '㎏', '㏖', 'A', 'K', 's', 'cd'. This study specifically investigates whether the students know the seven units and understand their uses and how they read and learn them. The subjects were 1030 students from the University of Education in Jinju, Geongsangnamdo. Data was collected through a questionnaire which was designed by this researcher and checked by an authority, and the frequency and percentage of reponses to each question were obtained and analysed. Findings show all the students knew very well that 'm' and '㎏' are included in the seven units, compared to the others which low percentage of the students considered as the elements. In terms of understanding of use, the units of the length 'm', the mass '㎏', and the time 's' are well understood, presumably, because they are often used in ordinary life and school, while the amount of substance '㏖', the electric current 'A', the thermodynamic temperature 'K', and the luminous intensity 'cd' are not as well understood. It is probably because 'A', 'cd', and 'K' are hardly used in everyday life. With respect to reading the units, the subjects read 'm', '㎏', '㏖', and's' much better than the others. As for the source of learning them, most students answered they learned them in schools, which implies school education is very important. From these results it is concluded that school education should be accompanied with use in everyday life for understanding and using the units. SI Base Units understanding was investigated by an academic year. According to this investigation, generally the right answer rate differed 4<2<3<1 by an academic year in order. For the Senior, Sophomore appeared the right answer rate more high. because, they learned before in deepening or elementary course on chemistry and physics related with SI Base Units. On the other hand, for the junior answered low rate by this reason that they couldn't remember about SI Base Units that learned before. For the Freshman appeared low rate by this reason that they were not learned or graduated from the department of liberal art in high school.

• Journal of Acupuncture Research
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• 제23권3호
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• pp.21-35
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• 2006

Objectives : Herniation of Nucleus Pulposus(HNP) of Cervical is the most important reason that causes Cervical pain. The aim of this study is to investigate the effectiveness of Carthmi-Flos Herbal acua-acupuncture therapy for Cervical disc Herniation patients. Methods : To evaluate the effectiveness of Carthmi-Flos Herbal acua-Acupuncture Therapy, 20 patients were treated by Carthmi-Flos Herbal acua-acupuncture therapy. To estimate the efficacy of treatment, we used Quardruple Visual Analog Scale (QVAS). Results & Conclusion : 1. As a objectivity treatment record, they test treatment record good 35%, fair 35%, excellent 30%. 2. After Carthmi-Flos acua-acupuncture therapy, pain rate changed from 8.80 to 5.40 3. By the results which puts out the statistics in sex , a pain rate of male changed from 8.57$({\pm}1.51)$ to 2.71$({\pm}2.63)$, a pain rate of female 8.92$({\pm}0.95)$ to 3.77$({\pm}2.09)$. Intentional difference is none as a therapy. 4. By the results which puts out the statistics in age, after forties changed from 9.07$({\pm}0.88)$ to 3.80$({\pm}2.43)$ and before forties changed from 8.00$({\pm}1.58)$ to 2.20$({\pm}1.30)$. Intentional difference is none as a therapy. 5. By the results which puts out the statistics in Duration, pain rate of the acutest group changed from 8.36$({\pm}1.12)$ to 2.18$({\pm}1.08)$, pain rate of the subacute group changed from 9.80$({\pm}0.45)$, to 5.20$({\pm}2.68)$, pain rate of the chronic group changed from 8.67$({\pm}1.53)$ to 3.33$({\pm}1.53)$. Intentional difference is none as a therapy. 6. By the results which puts out the statistics in the reading of Lumbar MID, pain rate of the Bulging type changed from 9.00$({\pm}1.05)$ to 4.30$({\pm}2.67)$, pain rate of the Protruded type changed from 8.50$({\pm}1.00)$, to 3.50$({\pm}1.29)$, pain rate of the Extruded type changed from 6.00 to 1.00, pain rate of the Mixed type changed from 9.20$({\pm}0.84)$ to 2.00$({\pm}1.23)$, Intentional difference is none as a therapy.

• 정보관리학회지
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• 제38권3호
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• pp.335-356
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• 2021

이 연구는 2007년부터 2020년까지 공공도서관 통계를 이용하여 공공도서관의 기본 정보와 시설을 중심으로 14년 동안 우리나라 공공도서관의 변화 추이와 현황을 분석하였다. 연구 데이터는 국가도서관통계시스템으로부터 수집하고 이를 우리나라 인구수 및 1인당 GDP와 비교하였다. 그 결과, 우리나라 공공도서관은 2020년 현재 1,172개관으로 2007년에 비해 양적 측면에서 약 2배 가까이 증가하였으며, 이러한 증가는 1인당 GDP 및 인구수와 매우 강한 상관관계가 있음을 파악하였다. 2020년에는 지자체 소속 위탁 운영 공공도서관이 229개관으로 2007년에 비해 그 비율이 18.8%에서 25.1%로 상승하였다. 공공도서관의 부지면적은 도서관마다 편차가 크지만 시간이 지남에 따라 점점 넓어지는 추세를 보이며, 건물 연면적은 지자체 소속 도서관보다 교육청 소속 도서관이 더 넓고 시간에 따라 점점 넓어지는 추세를 보인 반면, 지자체 소속 도서관은 다소 감소하였다. 도서관의 총 좌석 수는 모든 도서관에서 감소하고 있으며 어린이 열람석과 노인 및 장애인 열람석은 다소 증가하는 경향을 보였다.