• The KIPS Transactions:PartB
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• v.8B no.6
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• pp.699-704
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• 2001

ABSTRACT In this paper, a new hybrid modular recurrent TDNN (time-delay neural network)-HMM (hidden Markov model) architecture for speech recognition has been studied. In TDNN, the recognition rate could be increased if the signal window is extended. To obtain this effect in the neural network, a high-level memory generated through a feedback within the first hidden layer of the neural network unit has been used. To increase the ability to deal with the temporal structure of phonemic features, the input layer of the network has been divided into multiple states in time sequence and has feature detector for each states. To expand the network from small recognition task to the full speech recognition system, modular construction method has been also used. Furthermore, the neural network and HMM are integrated by feeding output vectors from the neural network to HMM, and a new parameter smoothing method which can be applied to this hybrid system has been suggested.

• Journal of KIISE:Software and Applications
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• v.31 no.9
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• pp.1233-1245
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• 2004

Though biometrics to authenticate a person is a good tool in terms of security and convenience, typical authentication algorithms using biometrics may not be executed on resource-constrained devices such as smart cards. Thus, to execute biometric processing on resource-constrained devices, it is desirable to develop lightweight authentication algorithm that requires only small amount of memory and computation. Also, among biological features, face is one of the most acceptable biometrics, because humans use it in their visual interactions and acquiring face images is non-intrusive. We present a new face authentication algorithm in this paper. Our achievement is two-fold. One is to present a face authentication algorithm with low memory requirement, which uses support vector machines (SVM) with the feature set extracted by genetic algorithms (GA). The other contribution is to suggest a method to reduce further, if needed, the amount of memory required in the authentication at the expense of verification rate by changing a controllable system parameter for a feature set size. Given a pre-defined amount of memory, this capability is quite effective to mount our algorithm on memory-constrained devices. The experimental results on various databases show that our face authentication algorithm with SVM whose input vectors consist of discriminating features extracted by GA has much better performance than the algorithm without feature selection process by GA has, in terms of accuracy and memory requirement. Experiment also shows that the number of the feature ttl be selected is controllable by a system parameter.

• Journal of the Korea Convergence Society
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• v.9 no.10
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• pp.131-139
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• 2018

The purpose of this study is to examine the dental hygienists' awareness on the 4th industrial revolution in preparation for the future of dental treatment field. A questionnaire survey was conducted on 209 dental hygienists who are working at dental clinics in Daegu city and the results were as follows. The average awareness on the 4th industrial revolution was 2.41, which is comparatively low. In each section, the willingness to education was 2.87, the influence to dental field was 2.81, the perception degree was 2.25 and the preparation degree was 1.72 which is relatively low. The awareness according to general characteristics, there was a significant difference from age and workplace in influence to dental field (p<0.05, p<0.001), from job position and academic degree in willingness to education (p<0.05). According to the study of correlation among awareness, influence, preparation and willingness of education to 4th industrial revolution. Also there was a positive (+) correlation in everyway, as awareness level is high, the degree of influence, preparation and willingness of education are also high. In conclusion, to prepare for the future medical convergence, it is necessary to raise concern and change in perception to high medical technology by developing and offering diverse education programs as to 4th industrial revolution to dental hygienists.

• Journal of the Korean Society of Food Science and Nutrition
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• v.32 no.2
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• pp.295-301
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• 2003

This study was carried out to investigate perception about body image, dietary attitude, nutrient intake and dietary self-efficacy of high school students in Pusan. A questionaire survey was distributed among 491 high school students. The survey was conducted from April 8 to April 22 in 2002. The results are summarized as follows. Forty percents of the underweight group, 53.9% of the normal weight group, 61.8% of the overweight group and 48.2% of obesity group have correct perception about their body image. Most of the students were concerned with their body image and weight control. Obesity of parents was significantly correlated with obesity of the subjects (p<0.01). The higher obesity rate, the lower dietary self-efficacy. The higher dietary self-efficacy, the higher dietary attitude. There was a significant positive correlation between the education level of their parents and dietary attitude of the subjects (p<0.01) and a significant negative correlation between obesity rate of their mothers and dietary attitude of the subjects (p<0.01). Dietary attitude scores showed no significant difference among the groups. Intakes of most nutrients, except protein, niacin and vitamin C, were lower than those of the recommended dietary allowances for Koreans. Therefore, proper nutrition education is required to improve their nutritional status and dietary self-efficacy.

• Korean Journal of Comparative Education
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• v.24 no.3
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• pp.157-177
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• 2014

The importance of selection methods of secondary school teachers have gathered attention due to their enormous influence on the pre-service education programs. However, scholars and practitioners are skeptical about the effectiveness of the measures, especially under the condition of teacher oversupply found in South Korea and China. Based on this problem statement, this study seeks to compare the secondary teacher employment methods of the two countries to better understand the situations as well as to draw implications for improvement. We reach the following conclusions through comparative analyses. First, the reforms of the teacher employment system in both countries have been triggered by the quantitative supply concerns not by the qualitative concerns. Second, both countries require teaching license as a precondition of employment, while their quality assurance measures for the license reveal critical limitations. Third, both countries have attempted to improve selection methods; nevertheless, oversupply of prospective teachers makes objectivity and fairness more important than the appropriateness. Based on the conclusions, policy implications focusing on the quality-oriented approach are suggested in order to employ effective secondary teachers who can contribute to the quality improvement of school education.

• Journal of the HCI Society of Korea
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• v.6 no.1
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• pp.1-8
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• 2011

As virtual realty has become an issue of providing immersive services, in the area of virtual realty, it has been actively investigated to develop user interfaces for immersive interaction. In this paper, we propose a gesture recognition based immersive user interface by using an IR LED embedded helmet and data gloves in order to reflect the user's movements to the virtual reality environments effectively. The system recognizes the user's head movements by using the IR LED embedded helmet and IR signal transmitter, and the hand gestures with the data gathered from data gloves. In case of hand gestures recognition, it is difficult to recognize accurately with the general recognition model because there are various hand gestures since human hands consist of many articulations and users have different hand sizes and hand movements. In this paper, we applied the Mixture-of-Experts based gesture recognition for various hand gestures of multiple users accurately. The movement of the user's head is used to change the perspection in the virtual environment matching to the movement in the real world, and the gesture of the user's hand can be used as inputs in the virtual environment. A head mounted display (HMD) can be used with the proposed system to make the user absorbed in the virtual environment. In order to evaluate the usefulness of the proposed interface, we developed an interface for the virtual orchestra environment. The experiment verified that the user can use the system easily and intuituvely with being entertained.

• The Journal of the Convergence on Culture Technology
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• v.10 no.4
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• pp.373-381
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• 2024

We confirmed that the children affected by child abuse, which has recently become an issue in the counseling field, were the highest in the ages of 10-17, and the number of occurrences by parents was the highest. We tried to understand the hardships of parents with adolescent children while conducting counseling and parental education to understand the difficulties of parenting experiences that play an important role in growing children. Therefore, this study attempted to analyze the subjective perception types and characteristics of each type of parenting experience of parents with adolescent children using the Q methodology. After forming a Q population and extracting the 33-question statement of the Q sample, the P sample was classified into the Q sample of 35 parents with adolescent children, and the perception type analysis was conducted with the QUANL program. As a result of our study, it was found that Type 1 was the unconditional love and understanding type, which was recognized as a process of endless understanding of children, Type 2 was the "reflection and change type," which recognizes empathy with children, communication, and parental reflection and change, Type 3 was the "learning and psychological independence assistance type," which recognizes that children should be psychologically independent and grow, and Type 4 was the "regret and identity confusion type," which recognizes regret about raising children in childhood and identity confusion as parents. Our study is meaningful in that it classified the subjective perception structure of parenting experiences perceived by parents with adolescent children by type. It is expected that this subjectivity study on parenting experiences will be used as basic data for parental education and parental counseling to raise adolescent children.

• 한국방재학회:학술대회논문집
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• 2011.02a
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• pp.191-191
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• 2011

최근 빗물이 우리가 앞으로 이용할 수 있는 수자원이라는 사회적인 인식의 변화와 함께 빗물이용이 더욱 요구되어졌다. 특히 빗물의 이용 저류 침투를 목적으로 하는 우수 관리에 대한 관심이 증가하면서 빗물이용시설의 설치, 운용의 필요성이 대두되고 있다. 이에 반해 화재발생은 해마다 증가하고 있으며, 화재 증가는 소방력 활동의 증가로 귀결되는데 현장활동 인력과 장비 그리고 화재를 진압하는데 사용되는 소방용수 증가를 의미한다. 따라서 본 연구는 빗물을 소방용수로 즉, 화재진압시 활용 가능성과 수자원 절약, 화재 사각지역 해소 측면을 살펴보기 위해서 통계분석, 현장조사, 기존 빗물이용시설 및 향후 완공 예정인 우수유출저감시설 활용과 소방용수 미설치 지역과 소방관서 옥상에 빗물이용시설 설치 방안을 제시하였으며, 그에 따른 공공서비스 확대와 경제성 분석을 통하여 다음과 같은 연구결과를 도출하였다. 첫째, 기존 빗물이용시설을 소방용수로 적극적으로 활용해야 한다. 빗물이용시설의 주 용도로 조경용수, 청소용수, 소방용수로 나눌 수 있는데 이수 측면에서 화재가 발생하지 않으면 소방용수로서 이용이 거의 없는 실정이다. 이는 해당 건물관계자나 소방대원들이 빗물이용시설을 인식을 못하고, 사용과 접근성 불편으로 상수도와 연결된 소화전에 의존하는 경우가 많다고 본다. 둘째, 상수도시설이 없는 지역은 빗물이용으로 소방용수를 확보해야 한다. 섬, 산간, 고지대, 농촌지역 등 상수도 서비스를 공급받지 못하는 지역은 화재발생시 수원확보곤란으로 인명과 재산피해의 증가요인으로 작용할 수 있다. 공공서비스 확대차원에서 화재 사각지역을 해소하기 위해 지붕면을 이용한 각 가정마다 또는 공동 빗물저장소와 지형의 비탈면을 이용한 빗물이용시설 설치로 소방용수 확보의 필요성을 확인했다. 셋째, 소방관서 신설시 빗물이용시설을 도입하여 설치한다. 화재통계와 현장조사를 통하여 소방차 출동대기부터 화재진압까지 많은 양의 물이 사용되는 것으로 파악되었다. 대부분 먹는 물 즉, 상수도를 이용한다는 점에서 수자원 절약과 화재진압에 사용된 물은 재생 불가능이라는 환경보전 측면에서 빗물이용으로 해답을 찾아본다. 따라서 빗물을 많이 저장할 수 있도록 옥상, 부지 등 집수면적을 확대하고 이에 적합한 저류시설을 갖춘 빗물이용시설을 설치한다. 끝으로 신속하고 효율적인 화재진압이 중요한 만큼 빗물을 소방용수로 활용하고자 할 때는 언제 어디에서나 현장 접근성, 사용 편리성, 충분한 수량을 고려해야한다.

• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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• 2001.04a
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• pp.168-168
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• 2001

제지공정의 지절 현상은 많은 공정 변수들이 복합적으로 작용하여 발생하는 가장 큰 공정 트러블 중의 하나이다. 지절은 생산량 감소 뿐만 아니라 발생 후 공정의 복구 와 정리, 생산재가동 및 공정의 재안정화를 위해 많은 시간과 비용, 그리고 노력이 투 입되어야 하므로 공정의 효율과 생산성을 크게 저하시키는 요인이다. 그러나 지절 현상 의 복잡성 때문에 이에 대해 쉽게 접근하거나 해결하지 못하고 있는 것이 현실이지만 그 필요성은 더욱 더 증대되고 있다. 본 연구에서는 최근 들어 각종 산업분야에서 복잡 한 공정상의 결점 발견 및 진단에 효과적이라고 인정받고 있는 예측 분석기법인 인공 신경망(artificial neural network) 시율레이션과 일반적인 통계기법 중의 하나인 주성분 분석을 이용하여 제지 공정의 지절 현상의 검토 가능성을 타진하였다. 인공신경망이란 인간두뇌에서 일어나는 자극-반응-학습과정을 모사하여 현실세계에 존재하는 다양한 현상들의 업력벡터와 출력상태 간의 비선형 mapping올 컴퓨터 시율 레이션을 통하여 분석하고자 하는 기법으로, 여러 가지 현상들을 학습을 통해서 인식하 는 신경망 내의 신경단위들이 병렬처리에 의해 많은 양의 자료에 대한 추론이나 판단 을 신속하고 정확하게 해주는 특징이 있으며 실시간 패턴인식이나 분류 응용분야에도 매우 매력적으로 이용되고 있는 방법이다. 이러한 인공 신경망 기법 중에서도 본 연구 에서는 퍼셉트론의 한계점을 극복하기 위하여 입력총과 출력층에 한 개 이상의 은닉층 ( (hidden layer)을 사용하여 다층 네트워으로 구성하고, 모든 입력패턴에 대하여 발생하 는 오차함수를 최소화하는 방향으로 연결강도를 조정하는 back propagation 학습 알고 리즘을 사용하였다. 지절의 원인으로 추정 가능한 공정인자들을 변수로 하여 최적의 인 공신경망을 구축하기 위해 학습률과 모멘트 상수의 변화 및 은닉층의 수와 출력층의 뉴런 수를 조절하는 동의 작업을 거쳐 네트워크의 정확도가 높은 인공신경망을 설계하 였다. 또한 이러한 인공신경망과의 비교분석을 위해 동일한 공정 데이터들올 이용하여 보편적으로 사용하는 통계기법 중의 하나인 주성분회귀분석을 실시하였다. 주성분 분석은 여러 개의 반응변수에 대하여 얻어진 다변량 자료의 다차원적인 변 수들을 축소, 요약하는 차원의 단순화와 더불어 서로 상관되어있는 반응변수들 상호간 의 복잡한 구조를 분석하는 기법이다. 본 발표에서는 공정 자료를 활용하여 인공신경망 과 주성분분석을 통해 공정 트러블의 발생에 영향 하는 인자들을 보다 현실적으로 추 정하고, 그 대책을 모색함으로써 이를 최소화할 수 있는 방안을 소개하고자 한다.

• Journal of Korean Home Economics Education Association
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• v.29 no.4
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• pp.133-147
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• 2017

The purpose of this study was to investigate the perception and intake of Kimchi in middle school students in Gwangju area and analyzed the difference of Kimchi intake according to Kimchi perception level to provide basic data to help middle school students develop proper dietary behavior. The data were collected from middle school students in Gwangju area and 374 questionnaires were used for analysis. The main results of this study are as follows. First, the perception of Kimchi of middle school students was 4.10 for first grade and 3.92 for third grade, showed significant difference (p<0.001) between first grade and third grade. Second, the preference of Kimchi of middle school students by grade showed significant difference between first grade and third grade at 'Kimchi preference' (p<0.001) and 'Reasons for not eating Kimchi' (p<0.05) respectively. 81.7% in the first graders and 59.8% in the third graders, and the first graders more preferred Kimchi than the third graders. Third, the pattern of Kimchi intake of middle school students by grade showed significant difference between first grade and third grade at 'Frequency of Kimchi intake' (p<0.05) and 'Amount of Kimchi taken at one time' (p<0.05) respectively. Fourth, the education of Kimchi of middle school students by grade showed significant difference between first grade and third grade at 'My attitude toward Kimchi recommendation' (p<0.05), 'Necessity of Kimchi intake education' (p<0.05), 'Whether you think it is good food for Kimchi information' (p<0.001), 'Preferred method for the Kimchi education' (p<0.001) and 'Methods for increasing Kimchi intake' (p<0.05) respectively. Fifth, the preference of Kimchi of middle school students by the degree of Kimchi recognition showed significant difference at 'Kimchi preference' (p<0.001), 'Reasons for liking Kimchi' (p<0.05) and 'Reasons for disliking Kimchi' (p<0.05) respectively. The pattern of Kimchi intake of middle school students by the degree of Kimchi recognition showed significant difference at 'Frequency of Kimchi intake' (p<0.001) and 'Amount of Kimchi taken at one time'(p<0.05) respectively. The the education of Kimchi of middle school students by the degree of Kimchi recognition showed significant difference at 'My attitude toward Kimchi recommendation' (p<0.05), 'The experience of making Kimchi' (p<0.05), 'Necessity of Kimchi intake education' (p<0.001) and 'Whether you think it is good food for Kimchi information' (p<0.001) respectively.