• Title/Summary/Keyword: time cognition

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Study on the Take-over Performance of Level 3 Autonomous Vehicles Based on Subjective Driving Tendency Questionnaires and Machine Learning Methods

  • Hyunsuk Kim;Woojin Kim;Jungsook Kim;Seung-Jun Lee;Daesub Yoon;Oh-Cheon Kwon;Cheong Hee Park
    • ETRI Journal
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    • v.45 no.1
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    • pp.75-92
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    • 2023
  • Level 3 autonomous vehicles require conditional autonomous driving in which autonomous and manual driving are alternately performed; whether the driver can resume manual driving within a limited time should be examined. This study investigates whether the demographics and subjective driving tendencies of drivers affect the take-over performance. We measured and analyzed the reengagement and stabilization time after a take-over request from the autonomous driving system to manual driving using a vehicle simulator that supports the driver's take-over mechanism. We discovered that the driver's reengagement and stabilization time correlated with the speeding and wild driving tendency as well as driving workload questionnaires. To verify the efficiency of subjective questionnaire information, we tested whether the driver with slow or fast reengagement and stabilization time can be detected based on machine learning techniques and obtained results. We expect to apply these results to training programs for autonomous vehicles' users and personalized human-vehicle interfaces for future autonomous vehicles.

The study of Instrument Panel object cognition time and accuracy between subject groups (피험자 집단간 Instrument Panel 객체 인지시간 및 정확도에 관한 연구)

  • Yu, Seung-Dong;Park, Peom
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.22 no.52
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    • pp.33-41
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    • 1999
  • More than 90 percent of traffic accidents were caused by human errors in driving situation. However, the ergonomic studies were not enough to prevent these human errors. Especially, drivers acquire more than 70 percent of information using the vision, and this shows the importance of consideration about the driver's visual cognition characteristics. Consequently, the driver's cognition time and the cognition accuracy were measured for the Instrument Panel(IP) of vehicle cockpit in this study. For the experiment, subjects were divided in two groups. The first group of subjects had their own vehicles and the driver license, and the second group of the subjects didn't have own vehicle but had the driver license. IP Images were used in the experiment and the each image was made by changing layout of objects within devices. The results showed that there were no differences for the cognition time and the accuracy between images within the group, and the results between the groups showed the same trend.

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Cognitive Model-based Evaluation in Dynamic Traffic System (동적 교통 시스템의 인지공학적 평가에 관한 연구)

  • Kang, Myong-Ho;Cha, Woo-Chang
    • Journal of the Ergonomics Society of Korea
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    • v.21 no.3
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    • pp.25-34
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    • 2002
  • The road sign in dynamic traffic system is an important element which affects on human cognitive performance on driving. Web-based vision system simulator was developed to examine the cognition time of the road sign in dynamic environment. This experiment the cognition time of the road sign in dynamic environment. This experiment was designed in with-subject design with two factors: vehicle speed and the amount of information of the traffic sign. It measured the cognition time of the road sign through two evaluation methods: the subjective test with vision system simulator and computational cognitive model. In these two evaluations of human cognitive performance under the dynamic traffic environment, it demonstrated that subject's cognition time was affected by both the amount of information of traffic sign and driving speed.

A Study on Sensitive Cognition for the Physical Factor of Color (색의 물리적 요소에 관한 감성인식 연구)

  • 심준형;이근희;오형술
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.18 no.36
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    • pp.31-39
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    • 1995
  • This study reflected sensitivity cognition in using color and evaluated the performance in task regarded GUI environment. Largely, three experiments were conducted. First, the searching time in text environment was compared with the searching time in color environment. Second, to know relationship of hue, saturation, lightness which are factors of color, and searching time, the searching time was measured using two-way ANOVA with interaction with three independent variables: hue, saturation, and distance. Third, sensitivity cognition about color was investigated and the performance of searching task was analyzed in the environment designed by color regarded sensitivity cognition. According to statistical results, the average searching time was decreased about 50.31% in color environment. The searching time was significant among the difference of hue and saturation. For the factor of color, the more the ratio of green and red was increased, the more searching time was decreased. The more the ratio of gray was increased, the more searching time was increased. And the searching time was developed in the environment designed by color regarded sensitivity. The purpose of this study is the presentation of sensitivity realization method and verification in the reflection and application of sensitivity to the industrial environment and design.

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Investigating the Correlation between Cognition and Emotion Charateristics and Judgmental Time-Series Forecasting Using a Self-Organizing Neural Network (자기조직 신경망을 이용한 인지 및 감성 특성의 직관적 시계열 예측과의 상관성 조사)

  • Yoo, Hyeon-Joong;Park, Hung-Kook;Song, Byoung-Ho
    • Asia pacific journal of information systems
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    • v.11 no.4
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    • pp.175-186
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    • 2001
  • Though people frequently rely on intuition in managing activities, they rarely use it in developing effective decision-making support systems. In this report, we investigate the correlations between characteristics of cognition and emotion and judgmental time-series forecasting accuracy, and compare their strengths by using a self-supervised adaptive neural network. Through the experiments, we hope to help find a desirable atmosphere for decision-making. Our experiments showed that both cognition characteristics and emotion characteristics had correlations with the time-series forecasting accuracy, and that cognition characteristics had larger correlation than emotion characteristics. We also found that conceptual style had larger correlation than behavioral or analytical styles with the accuracy.

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A Study on Cognition of Credit Card and Shopping Value Based on the Consumption Orientation (소비성향에 따른 신용카드인식 및 쇼핑 가치에 관한 연구)

  • Seo, In-Joo
    • Journal of Families and Better Life
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    • v.30 no.3
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    • pp.105-118
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    • 2012
  • This study aims to recognize cognition of credit card and shopping value in contemporary society, cognition of credit card and shopping value according to types of consumption orientation, and factors that influence cognition of credit card and shopping value, and ultimately provide a foundation for establishing proper shopping value. A total of 453 women and men residing in Seoul have been set as research object in order to achieve the purpose of the study. The data was analyzed by Cronbach' alpha, frequencies, percentile, mean, factor analysis, K-mean cluster analysis, t-test, ANOVA and Duncan's multiple range test, multiple linear regression. All analysis progress was done by spsswin12.0 statistics program. A summary of this research goes as follows: First, categorization of consumption orientation lead to two clusters of rational and symbolic & conspicuity consumption patterns and cognition of credit card was categorized into positive and negative cognition and shopping value was categorized into hedonic shopping value, utilitarian shopping value and time-save shopping value. Second, rational shoppers had high utilitarian shopping values and symbolic & conspicuity shoppers had high both hedonic shopping values and utilitarian shopping values. Third, the most influential factor in hedonic shopping value and utilitarian was consumption orientation. In conclusion, this research has showed that cognition of credit card and shopping value according to types of consumption orientation patterns varied, and that consumption orientation was an influential factor on cognition of credit card and shopping value.

Development of the Multi-Path Finding Model Using Kalman Filter and Space Syntax based on GIS (Kalman Filter와 Space Syntax를 이용한 GIS 기반 다중경로제공 시스템 개발)

  • Ryu, Seung-Kyu;Lee, Seung-Jae;Ahn, Woo-Young
    • Journal of Korean Society of Transportation
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    • v.23 no.7 s.85
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    • pp.149-158
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    • 2005
  • The object of this paper is to develop the shortest path algorithm. The existing shortest path algorithm models are developed while considering travel time and travel distance. A few problems occur in these shortest path algorithm models, which have paid no regard to cognition of users, such as when user who doesn't have complete information about the trip meets a strange road or when the route searched from the shortest path algorithm model is not commonly used by users in real network. This paper develops a shortest path algorithm model to provide ideal route that many people actually prefer. In order to provide the ideal shortest path with the consideration of travel time, travel distance and road cognition, travel time is predicted by using Kalman filtering and travel distance is predicted by using GIS attributions. The road cognition is considered by using space data of GIS. Optimal routes provided from this paper are shortest distance path, shortest time path, shortest path considering distance and cognition and shortest path considering time and cognition.

A Study on the Meaning of Reflection and Meta-Cognition in Mathematics Education (반성과 메타인지의 의미에 대한 고찰)

  • Hwang, Hye Jeang;Kim, Soo-Jin
    • Communications of Mathematical Education
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    • v.33 no.1
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    • pp.35-45
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    • 2019
  • Reflection and Meta-Cognition became the centered interest as main subjects of the mathematics education studies together with problem solving education in the 1980s. And lots of researches who have concerned with them have been even progressed actively. But, the concept of the reflection and particularly meta-cognition has been pointed out continually because of its ambiguity and uncertainty. There is almost no researches intended to reveal the concept itself. Although the status of the reflection and/or meta-cognition in mathematics education. Therefore, it is significant at this point in time that the work of examining the concept of the reflection and meta-cognition be accomplished. By this reason, this study tried to examine and find out the essential nature of the concept of reflection and meta-cognition in aspects of mathematics education.

Cognitive Model-based Evaluation of Traffic Simulation Model (교통 시뮬레이션 모텔의 인지공학적 평가에 관한 연구)

  • 강명호;차우창
    • Proceedings of the Korea Society for Simulation Conference
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    • 2002.05a
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    • pp.163-168
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    • 2002
  • The road sign in dynamic traffic system is an important element which affects on human cognitive performance on driving. Web-based vision system simulator was developed to examine the cognition time of the road sign in dynamic environment. This experiment was designed in within-subject design with two factors; vehicle speed and the amount of information of the traffic sign. It measured the cognition time of the road sign through two evaluation methods; the subjective test with vision system simulator and computational cognitive model. In these two evaluations of human cognitive performance under the dynamic traffic environment, it demonstrated that subject's cognition time was affected by both the amount of information of traffic sign and driving speed.

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A Study on the Relationship between Depression and Cognition in the Community Female Aged (일지역 여성노인의 우울과 인지기능의 관계에 대한 연구)

  • Chu, Su-Kyung;Choi, Hee-Jung;Yoo, Jang-Hak
    • Journal of East-West Nursing Research
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    • v.16 no.2
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    • pp.131-137
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    • 2010
  • Purpose: The purpose of this study was to investigate the relationship between depression status and cognitive function in the community female aged. Methods: This was a descriptive study. Data were collected using individual-based interviews from 120 senior female residents in the Hall for the aged in the city of S. The length of time for data collection was from June 18 to 29, 2007. The tool of data collection was Korean Version of Mini-Mental State Examination (Kwon & Park, 1989), Short-form Geriatric Depression Scale (Bae, 1996). Results: Depression & cognition showed significant differences according to age, regular exercise. The depression group scored significantly lower than the normal group in total score of cognition, orientation, memory recall. Conclusion: It is necessary to prepare the composite programs, which can improve not only cognition but depression in the community female aged.\