• Title, Summary, Keyword: Time

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Buying Time Use & It's Influential Factors of Urban Married Women (도시주부의 구매시간 사용 및 영향요인)

  • 두경자
    • Journal of the Korean Home Economics Association
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    • v.39 no.6
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    • pp.51-60
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    • 2001
  • The purpose of this study is analyze buying time use and it's influential factors of buying types. The major findings are follows: (1) Physiological time, household work time, earning time & leisure time are respectively similar to The Investigation of Korean Life Time(1991,1995). (2) Buying time of wives who perceived time deficit are shorter than those who did not perceive so. (3) Internet shopping time is 18minutes, direct visiting shopping time is 68minutes and those who directly visit shops pursued leisure effect. (4) Influential factors of internet shopping time are educational level, household work time, earning time & leisure time and direct visiting shopping time are husband's job, household work time, earning tile & leisure time.

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A Comparative Study on Art, Music and Architecture on the Concept of Time from Viewpoints of Oriental and Western Philosophy (동${\cdot}$서양 사상의 시간개념에 따른 미술${\cdot}$음악${\cdot}$건축의 비교에 관한 연구)

  • Lee, Hong-Kyu;Dong, Jung-Keun
    • Korean Institute of Interior Design Journal
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    • no.34
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    • pp.61-68
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    • 2002
  • It aims to understand how the time can be expressed in architecture from viewpoints of Oriental and Western philosophy. We just have done sporadic studies such as historical time, physical time, specific time, time as the space-time continuum and appreciation time. It`s impossible to find out that time exactly is since `time` is ambiguous. Because the meaning is formed newly by relational changes between visible and invisible existing thing. In such point of view, this study attempts at analyzing the inter-relationship between the art, music, architecture and time-concept in oriental and western philosophy. A comparative study follows : Time can be classified into the linear concept of time & the cyclic concept of time in an agricultural civilization and oriental philosophy. Linear concept of time can be divided into 1)the inevitable concept of time and 2)the 4-dimensional concept of time and 3) the indefinite concept of time.

A study on evaluation of information retrieval system (정보검색(情報檢索)시스템의 평가(評価)에 관한 연구(硏究))

  • Park, In-Ung
    • Journal of the Korean BIBLIA Society for library and Information Science
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    • v.5 no.1
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    • pp.85-105
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    • 1981
  • Information is an essential factor leading the rapid progress which is one of the distinguished characteristics in modem society. As more information is required and as more is supplied by individuals, governmental units, businesses, and educational institutions, the greater will be the requirement for efficient methods of communication. One possibility for improving the information dissemination process is to use computers. The capabilities of such machine are beginning to be used in the process of Information storage, retrieval and dissemination. An important problems, that must be carefully examined is whether one technique for information retrieval is better for worse than another. This paper examines problem of how to evaluate an information retrieval system. One specific approach is a cost accounting model for use in studying how to minimize the cost of operating a mechanized retrieval system. Through the use of cost analysis, the model provides a method for comparative evaluation between systems. The general cost accounting model of the literature retrieval system being designed by this study are given below. 1. The total cost accounting model of the literature retrieval system. The total cost of the literature retrieval system = (the cost per unit of user time X the amount of user time) + ( the cost per unit of system time X the amount of system time) 2. System cost accounting model system cost = (the pre-search system cost per unit of time X time) + (the search system cost per unit of time X time) + (the post search system cost per unit of time X time) 1) Pre-search system cost per unit of time = cost of channel per unit time + cost of central processing unit per unit time + cost of storage per unit time 2) Search system cost per unit of time = comparison cost + document representation cost. 3) Post-search system cost per unit of time. = cost of channel per unit time + cost of central processing unit per unit time + cost of storage per unit time 3. User cost accounting model Total user cost = [pre-search user cost per unit of time X (time + additional time) ] + [search user cost per unit of time X (time + additional time) ] + [post-search user cost per unit of time X (time + additional time) ].

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On Benchmarking of Real-time Mechanisms in Various Periodic Tasks for Real-time Embedded Linux (실시간 임베디드 리눅스에서 다양한 주기적 타스크의 실시간 메커니즘 성능 분석)

  • Koh, Jae-Hwan;Choi, Byoung-Wook
    • The Journal of Korea Robotics Society
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    • v.7 no.4
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    • pp.292-298
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    • 2012
  • It is a real-time system that the system correctness depends not only on the correctness of the logical result of the computation but also on the result delivery time. Real-time Operating System (RTOS) is a software that manages the time of a microprocessor to ensure that the most important code runs first so that it is a good building block to design the real-time system. The real-time performance is achieved by using real-time mechanisms through data communication and synchronization of inter-task communication (ITC) between tasks. Therefore, test on the response time of real-time mechanisms is a good measure to predict the performance of real-time systems. This paper aims to analysis the response characteristics of real-time mechanisms in kernel space for real-time embedded Linux: RTAI and Xenomai. The performance evaluations of real-time mechanism depending on the changes of task periods are conducted. Test metrics are jitter of periodic tasks and response time of real-time mechanisms including semaphore, real-time FIFO, Mailbox and Message queue. The periodicity of tasks is relatively consistent for Xenomai but RTAI reveals smaller jitter as an average result. As for real-time mechanisms, semaphore and message transfer mechanism of Xenomai has a superior response to estimate deterministic real-time task execution. But real-time FIFO in RTAI shows faster response. The results are promising to estimate deterministic real-time task execution in implementing real-time systems using real-time embedded Linux.

A Study of the Value of Travel Time Reliability (통행시간 신뢰성 가치에 관한 연구)

  • Cho, Hanseon
    • International Journal of Highway Engineering
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    • v.15 no.4
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    • pp.155-165
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    • 2013
  • PURPOSES : Benefits for improvement of travel time reliability obtained from construction of new highways should be considered as a major factor in the feasibility study for highway constructions. The purpose of this study is to develop a method of estimation for the value of travel time reliability. METHODS : Highway type (urban/rural highway) and traffic flow type(interrupted/uninterrupted) was considered to estimate he value of travel time reliability. And Double-bounded Dichotomous Choice among Contingent Valuation Method(CVM) was applied to survey the willingness-to-pay of drivers when travel time reliability is improved. Finally the value of travel time reliability was estimated using the results of survey and logit model. The value of travel time reliability was estimated considering travel objectives, time constraint travel and non-time constraint travel. RESULTS: The value of travel time reliability of business trip is higher than that of non-business trip. The value of travel time reliability of time constraint travel is higher than that of non-time constraint travel. The value of travel time reliability in urban area is higher than that in rural area. CONCLUSIONS: It was concluded that the proposed method in this study is more realistic and proper to estimate the value of travel time reliability because it reflects the situations of time constraint travel and non-time constraint travel.

A Study on the Generalization of the Manabe Standard Forms with the Genetic Algorithm

  • Kang, Hwan-Il;Jung, Yo-Won
    • 제어로봇시스템학회:학술대회논문집
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    • pp.116-120
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    • 1999
  • The step response of the Manabe standard form[1]has little overshoot and shows almost same waveforms regardless of the order of the characteristic polynomials. In some situations it is difficult to control the rise time and settling time simultaneously of the step response of the Manabe standard form. To control its rise time and settling time efficiently, we develop the generalization of the Manabe standard form: we try to find out the SRFS(Slow Rise time & Fast Settling time) form which has the slower rise time and faster settling time than those of the Manabe standard form. we also consider the other three forms: FRSS(Fast Rise time & Slow Settling time), SRFS(Slow Rise time & Fast Settling time) and SRSS(Slow Rise time & Slow Settling time) forms. In this paper, by using the genetic algorithm, we obtain all the coefficient of the four forms we mention above. Finally, we design a controller for a given plant so that the overall system has the performance that the rise time is faster, the settling time is slower than those of the Manabe standard form.

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Time Management Behavior and Variables Related (시간관리행동과 관련 변수: 취업주부를 대상으로)

  • 한경미
    • Journal of Families and Better Life
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    • v.11 no.2
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    • pp.83-95
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    • 1993
  • This study investigated time management behavior of employed wives and variables related. The samples were composed of 396 wives living in Seoul and Kwangju city. The major finding are as follow: 1) The level of the time management of employed wives was slightly high. 2) The dominant factor in time management behavior was goal setting and planning$.$priori-ting 3) The time management behavior was low related to the time use. A negative relationship was found between time management behavior and psysiological time employed time psysical housework time and passive leisure time while a positive relationship was found managerial housework time and active leisure time 4) A employed wife with higher work status education and income level efficiently managed time Education and extend family type turned out facilitating factors the more employed time was found constraint factor in time management.

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TomoTherapy: Analysis of treatment time and influencing factor (TomoTherapy: 치료 소요시간 및 영향 요인 분석)

  • Son, Jong Gi;Kang, Hyun Sung;Hwang, Chul Hwan;Se, Seung Jeong;Choi, Min Ho
    • The Journal of Korean Society for Radiation Therapy
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    • v.29 no.2
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    • pp.119-128
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    • 2017
  • Purpose: The purpose of this study was to measure the average actual treatment time at the time of Tomotherapy treatment. We want to investigate the time required for the procedure in the treatment process that affects the actual treatment time. Patients and Methods: We measured the time required by the procedure in 31 patients who were treated with tomography therapy. Beam-on time, Image registration time, Set-up with scan time and Actual treatment time were measured and stepwise regression analysis was performed. Result: The average treatment time per a patient was 21.44 - 23.92 minutes. Beam-on time, Image registration time, and Set-up with Scan time were the important factors affecting the actual treatment time. The biggest influence was Beam-on time and Registration time was less affected by analysing. Conclusion: The average treatment time per a patient in tomotherapy treatment was $22.68{\pm}3.37$ minutes. The Approximately 21 patients are expected to be treated within 8 hours of regular work time. However, if the treatment is interrupted or the time of the procedure is changed during the treatment process, it affects the schedule of the daily treatment patients and the workload is expected to increase.

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Time Use Analysis of Married Paid Workers by Employment Types

  • Lee, Hyun-Ah;Cho, Hee-Keum;Lee, Seung-Mie;Han, Young-Sun
    • Asian Journal of Business Environment
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    • v.6 no.2
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    • pp.5-13
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    • 2016
  • Purpose - This study aims to analyze time use of employees to see how they make a balance between work and family. We tried to analyze time use and time pressure of married paid workers in order to understand their work and family balance. Methodology - Time use was compared by employment types and time pressure groups. We analyzed the factors influencing time pressure, dividing two employment types. The data were selected from the 2009 Korean Time Use Survey. Results - Those who feel time pressure among full-timers spent more time on work and housework and less time on personal care and leisure than those who do not feel time pressure. Logit analysis on time pressure showed that full-timers feel more time pressure than part-timers do. Gender, age, education, income, day-off type, and the presence of preschool children were significant variables on time pressure. Conclusion - These results imply that time use and time pressure for married paid workers are affected by employment types. Flexibility of labor needs to enhance work and family balance for females who have preschool children.

Present and Future the Amounts of Leisure Time and Leisure Activities of Homemakers (주부의 여가시간과 여가활동의 실태와 지향에 관한 연구)

  • 민경애;윤복자
    • Journal of Families and Better Life
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    • v.3 no.1
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    • pp.15-22
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    • 1985
  • This study was designed to examine leisure time and leisure activities of homemakers and to predict future leisure time and future leisure time orientation. Present leisure time and future leisure time orientation were studied in relation to sociodemographic and physical environmental variables, time use variables and attitude variables. The major findings were the average daily housework time of homemakers was 6.5 hours on weekends. Housework time of employed homemakers was 3.5 hours and full-time homemakers was 8.0 hours. Daily leisure time of homemakers was 4.0 hours on weekdays and 4.8 hours o weekends. Most homemakers leisure activities on weekdays and weekends were reading, watching TV or listening to the radio and resting. In the future, they want to go hiking, hunting, traveling or fishing, attending concerts, drama or movies and playing sports games. The homemakers who felt their amount of present leisure time was sufficient were 35.4% and insufficient were 37.9%. Regarding the present leisure activities, 43.1% of homemakers expressed dissatisfaction, though 21.9% of them satisfied. Factors affecting the homemakers weekday leisure time were homemakers' occupation, family type, type of heating form house and cooking, weekday and weekend housework time of homemakers. Weekend leisure time interacted with family life cycle, number of children, income, education and occupation of homemakers, size of house, type of heating for house and cooking, weekday housework time of homemakers. housework time of employed housekeeper, husbands' weekend housework time, weekday leisure time of homemakers.

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