• Title/Summary/Keyword: Individual Characteristic

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Improved Tooth Detection Method for using Morphological Characteristic (형태학적 특징을 이용한 향상된 치아 검출 방법)

  • Na, Sung Dae;Lee, Gihyoun;Lee, Jyung Hyun;Kim, Myoung Nam
    • Journal of Korea Multimedia Society
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    • v.17 no.10
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    • pp.1171-1181
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    • 2014
  • In this paper, we propose improved methods which are image conversion and extraction method of watershed seed using morphological characteristic of teeth on complement image. Conventional tooth segmentation methods are occurred low detection ratio at molar region and over, overlap segmentation owing to specular reflection and morphological feature of molars. Therefore, in order to solve the problems of the conventional methods, we propose the image conversion method and improved extraction method of watershed seed. First, the image conversion method is performed using RGB, HSI space of tooth image for to extract boundary and seed of watershed efficiently. Second, watershed seed is reconstructed using morphological characteristic of teeth. Last, individual tooth segmentation is performed using proposed seed of watershed by watershed algorithm. Therefore, as a result of comparison with marker controlled watershed algorithm and the proposed method, we confirmed higher detection ratio and accuracy than marker controlled watershed algorithm.

Development of an Evaluation Method for a Driver's Cognitive Workload Using ECG Signal (ECG 기반의 운전자별 인지 부하 평가 방법 개발)

  • Hong, Wongi;Lee, Wonsup;Jung, Kihyo;Lee, Baekhee;Park, Jangwoon;Park, Suwan;Park, Yunsuk;Son, Joonwoo;Park, Seikwon;You, Heecheon
    • Journal of Korean Institute of Industrial Engineers
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    • v.40 no.3
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    • pp.325-332
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    • 2014
  • High cognitive workload decreases a driver's ability of judgement and response in traffic situation and could result in a traffic accident. Electrocardiography (ECG) has been used for evaluation of drivers' cognitive workload; however, individual differences in ECG response corresponding to cognitive workload have not been fully considered. The present study developed an evaluation method of individual driver's cognitive workload based on ECG data, and evaluated its usefulness through an experiment in a driving simulator. The evaluation method developed by the present study determined the optimal ECG evaluation condition for individual participant by analysis of area under the receiver operating characteristic curve (AUC) for various conditions (total number of conditions = 144) in terms of four aspects (ECG measure, window span, update rate, and workload level). AUC analysis on the various conditions showed that the optimal ECG evaluation condition for each participant was significantly different. In addition, the optimal ECG evaluation condition could accurately detect changes in cognitive workload for 47% of the total participants (n = 15). The evaluation method proposed in the present study can be utilized in the evaluation of individual driver's cognitive workload for an intelligent vehicle.

Establishment of Genetic Characteristics and Individual Identification System Using Microsatellite Loci in Jeju Native Horse (초위성체 DNA를 이용한 제주마 집단의 품종특성 및 개체식별 체계설정)

  • Cho, Byung-Wook;Jung, Ji-Hye;Kim, Sang-Wook;Kim, Heui-Soo;Lee, Hak-Kyo;Cho, Gil-Jae;Song, Ki-Duk
    • Journal of Life Science
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    • v.17 no.10
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    • pp.1441-1446
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    • 2007
  • This study was conducted to establish the individual identification system and to estimate the genetic characteristic of Jeju native horse (JNH) using 13 microsatellite markers located on different horse autosomes. The markers were genotyped on 191 animals from five horse breeds including Jeju native horse (JNH). In total, 138 alleles were detected from the genotypes of 13 microsatellite markers. The average heterozygosities ranged from 0.317 to 0.902 and the polymorphic information content (PIC) ranged from 0.498 to 0.799 in JNH. We found that there were significant differences in allele frequencies in JNH when compared with other horse breeds. In ATH4 marker, there were specific allele frequence pattern that some of allele only found in JNH, Mongolian horse (MONG) and Jeju racing horse (JRH). The calculated cumulative power of discrimination (CPD) was 99.9% when nine microsatellite loci were used for analysis in the individual identification system. Also, the matching probability that two unrelated animals would show the same genotypes, was estimated to be $0.60{\times}10^{-10}$. Therefore, in the nine markers used in this study can be used for individual identification in the Jeju native horse population.

Study on the Skin Characteristic and Questionnaire according to Yin Deficiency Syndrome (한방 음허변증에 따른 피부특성 및 설문 분석 연구)

  • Min, Seorim;Myoung, Jooonoh;Kim, Byunghyun;Kim, Taehoon;Hwang, Seung Jin;Lim, Jun-Man;Jin, Mu Hyun
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.45 no.4
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    • pp.381-388
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    • 2019
  • Recently, the importance of individual skin characteristic is emphasized for customized beauty products. There are many studies on the concept of the syndrome differentiation, related to individual cosmetics in Korean Medicine. However, skin characteristic according to Yin deficiency syndrome (YDS), which is associated with aging, are yet to be clarified. The objective of this study was to evaluate the skin characteristic and questionnaire of female with YDS compare to with non-YDS. 218 healthy females between 40 and 59 years of age were assessed for the skin hydration, elasticity, brightness (L* value), redness (a* value), pore, pigmentation, wrinkle, and sebum by Corneometerr®, Cutometerr®, and Janus lll. Independent t-test showed lower hydration, lower elasticity, and higher redness in the YDS group compared to the non-YDS group (all p < 0.05). There was significant difference on the facial fever, insomnia, decreased amount of urine, and skin sensitive checklist. These results suggested that using the questionnaire associated with YDS and skin characteristic could separate skin types and apply to customized beauty products.

Experimental Investigation of the Response Characteristics of Korean-seated Subjects under Vertical Vibration : (I) Apparent Mass (한국인 앉은 자세에 대한 수직 진동 응답특성의 실험적 연구: (I) 겉보기 질량(Apparent Mass))

  • 정완섭;김영태;권휴상;홍동표
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.13 no.8
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    • pp.645-650
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    • 2003
  • This paper introduces attempts to obtain the 'representative'characteristics of the apparent mass (or dynamic mass) of seated Korean subjects under vertical vibration. Individual responses of driving-oint apparent masses obtained from forty one Korean subjects are illustrated. Four kinds of vibration levels and three different sitting postures are selected to collect the characteristic responses of each subject. Those individual responses are used to estimate the 'mean'apparent mass, which may be expected to be a representative model to Korean subjects. Several interesting features of the estimated apparent mass are suggested and compared to those of ISO 5982.

Effects of Playfulness Among Young Children at Home and Class Characteristics on Playfulness at Kindergarten (가정에서의 놀이성과 학급 특성이 유치원에서의 놀이성에 미치는 영향)

  • Kang, Hyun Soo;Shin, Nary
    • Korean Journal of Childcare and Education
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    • v.14 no.3
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    • pp.97-115
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    • 2018
  • Objective: This study aimed to analyse the influence of young children's playfulness at home and class characteristics on their playfulness at kindergarten. Methods: Twenty eight classes of 3, 4 and 5 year olds in Gyeonggi and Chungbuk provinces were recruited. Participants of this study were mothers and head teachers of the children of recruited classes. Analyses was implemented using hierarchical linear modeling with HLM 7.0. Results: Differences were found in children's playfulness at kindergarten according to their classes. Individual characteristics including, gender, age and playfulness at home were shown to have significant influences on playfulness at kindergarten, while relevance of variable class characteristics to playfulness at kindergarten was not observed. Conclusion/Implications: It is concluded that playfulness of children is more related to playfulness at home rather than class characteristics, implying the strong characteristic of playfulness as an individual trait.

Analysis of Heat-transfer on Winding composed with Epoxy-resin (에폭시수지로 몰딩된 권선의 열전달 특성 연구)

  • 이현진;허창수;조한구;이기택;서유진
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.07a
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    • pp.402-405
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    • 2002
  • This paper presented the characteristic of Heat-transfer on the winding composed with Epoxy-resin in a 50 kVA cast-resin dry type transformer The resin cast transformer is used widely in supplying electricity systems. However, to know the thermal characteristics of that is very useful in designing, manufacturing, and maintaining, there is no pertinent method to calculate this. In this paper, Based on the results of the physical characteristics and the simulation by commercial software using FEM method, we established the Prototype Model for this. According to that Model, an analysis on a variation of the hottest spot temperature was discussed as a function of thermal conductivity for the individual windings composed with Epoxy-resin. The thermal conductivity of the individual windings with reference to upper way was discussed.

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Individual Differences of the Chewing Speed and Chews per Bolus in Rumination Behaviour of Cattle (소의 반추행동에 있어서 저작속도와 괴움질 식괴당 저작횟수의 개체차)

  • ;Minoru Otha
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.9 no.3
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    • pp.158-162
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    • 1989
  • This experiment was conducted to evaluate individual difference of chewing speed and chews per bolus duing the rumination using twenty three heads of grazing cattle and thirty six heads of barn feeding cattle. Rumination behaviour was measured and recorded by the masster EMC telemeter and visual observation. The chewing speed (chews/lOOsec) was significantly different individually (C.V. 13.0-14.5 %) among the variable aged group (1-60 months), but that of same aged group showed lower difference (C.V. 4.5 %). The chews per bolus showed even larger individually difference than the chewing speed, so the variable aged group (1-60 months) resulted the 15.5-16.2 %of C.V.and the same aged group showed the 9.5 % of C.V. Under 12 month aged cattle showed more rapid chewing speed than older aged cattle. The chewing speed changed with the growth of cattle, but the chews per bolus did not show any relationship with age, so it is regarded as the individually characteristic pattern.

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A Study on the Collective Control for the MAGLEV (자기부상열차의 이산집중제어)

  • Im, D.H.;Hong, J.P.;Kwon, B.I.;Hur, J.;Jang, S.M.
    • Proceedings of the KIEE Conference
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    • 1994.07a
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    • pp.177-179
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    • 1994
  • In conventional maglev system, the individual control system has been adopted. When this control system is applied, it is able to degrade the stability of levitation because of the interferance between magnet. And so, it is desiarable to be controled in global, collective control. In doing so, the dynamic suspension characteristics is improved. In this paper, collective control system using the equivalent inertia is examined and the dynamic characteristic are compared with that of individual control system.

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An Empirical Study of MIS CSF's for Small & Medium Business In Korea (우리 나라 중소기업 정보시스템의 성공요인에 대한 실증분석)

  • Ahn Jae-Young
    • Management & Information Systems Review
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    • v.3
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    • pp.399-417
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    • 1999
  • The purpose of this paper id to study the factors influencing MIS user satisfaction. For this purpose. I have reviewed the results of past studies on the performance factor of MIS, and introduced a new model associated with small & Medium Business. On the basis of this model, I have hypothesized that the following variables influence user satisfaction : (gender, age), individual characteristics(user attitude, training for user), managerial characteristic(top management involvement, organizational support) and task characteristics(task structure). There were 195 participants surveyed using questionnaires from 25 different small & medium Business in Pusan. The research model and associated hypotheses were tested by following statistical techniques: reliability test, regression, t-test and ANOVA. The findings of this study are follows; 1. It was found that gender and age are not correlated user satisfaction. 2. Among individual characteristics, only user attitude influence user satisfaction significantly. 3. While organizational supports influence positively user satisfaction, top management involvement do not influence it. 4. Task structure is highly correlated with user satisfaction. In spite of many factors affecting MIS success, this study did not consider all variables affect on user satisfaction. We need integrated model including more various factors.

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