• Title/Summary/Keyword: Non-Work Trip

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A Study on the Factors Concerning Non-Work Trip of the Elderly People : A case of Seoul Metropolitan Area (고령자의 비업무통행에 영향을 미치는 요인 분석: 수도권 사례를 중심으로)

  • Hahn, Jin-Seok;Oh, Sung-Ho;Park, Jong-Il;Kim, Joon-ki
    • Journal of Korean Society of Transportation
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    • v.30 no.4
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    • pp.61-70
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    • 2012
  • This research explores different non-work trip characteristics between the elderly group (65+) and the working age group (20-64) using heteroscadastic ordered logit model. The analysis is based on travel survey data of Seoul Metropolitan area in 2006. The results show that age induces heteroscadasticity and the model provides a better fit than ordered logit model. The factors increasing the number of non-work trip of the elderly were driver's license and household income. Conversely, the number of non-work trips decreased in those groups that were male, with a job, in aging, and with the number of preschool children. The factors having opposite effects (increased the number of non-work trips in the working age groups and decreased in the elderly group) between the elderly group and working age group were age and job.

Development of Round Trip Occurrence Simulator Considering Tooth Wear of Drill Bit (시추비트의 마모도를 고려한 라운드 트립 발생 예측 시뮬레이터 개발)

  • Lee, Seung Soo;Kim, Kwang Yeom;Shin, Hyu-Soung
    • Tunnel and Underground Space
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    • v.23 no.6
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    • pp.480-492
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    • 2013
  • After the introduction of geothermal power generation technology based on engineering reservoir creation that can be applied on non-volcanic region, industrial need for studies on the efficient and economic execution of costly deep-depth drilling work becomes manifest increasingly. However, since it is very difficult to predict duration and cost of boring work with acceptable reliability because of many uncertain events during the execution, efficient and organized work management for drilling is not easily achievable. Especially, the round trip that discretely occurs because of the abrasion of bit takes more time as the depth goes deeper and it has a great impact on the work performance. Therefore, a technology that can simulate the occurrence timing and depth of round trip in advance and therefore optimize them is essentially required. This study divided the abrasion state of bit into eight steps for simulation cases and developed a forecast algorithm, i.e., TOSA which can analyze the depth and timing of round trip occurrence. A methodology that can divide a unit section for simulation has been suggested; while the Bourgoyne and Young model has been used for the forecast of drilling rates and bit abrasion extent by section. Lastly, the designed algorithm has been systemized for the convenience of the user.

Analysis of Activity Participation and Travel Behavior at Weekend (토요일 출근자 및 휴무자의 활동참여 및 통행행태 분석)

  • Kim, Dae Hun
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.28 no.2D
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    • pp.171-179
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    • 2008
  • In this paper, "Gyeonggi-Do household weekend travel survey" is used in order to analyze activity participation and travel behavior for the people who go to work on Saturday(workers) and those who do not go to work(non-workers). To find out causal relationship between activity participation and travel behavior, Structural Equation Models are developed. Examination of the causal relationship between activity participation and travel behavior identifies three stages. Firstly, subsistence activities and leisure activities are generated. Secondly, each activity participation produces trip volumes and travel times. Finally, the sum of travel times forms trip volumes. Looking into the activity participation stages for the workers, their subsistence activies have a tendency to take place first, and leisure activities usually follow. Non-workers generate more simple trip chains and most of their first stage activities are leisure related.

Analysis of Stop-and-Wait ARQ Protocol under Markovian interruption (Markovian 간섭 신호하에서의 Stop-­and-­Wait ARQ Protocol의 성능 분석)

  • 김성일;신병철
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.7 no.8
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    • pp.1674-1683
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    • 2003
  • The performance of a packet data multiplexer with stop­and­wait ARQ protocols under Markovian interruption is considered in this work It is assumed that the input process, into the system is Poisson process, and that the output channel is divided into a series of time slots and a data packet can be transmitted in a slot time. In this system the round­trip propagation delay is defined to be the frame time. It is modeled that the output channel can be blocked by some Markevian interruption, whose state change between the blocking and non­-blocking states is given by Markov process. The overall system has been analyzed by constructing a relationship, taking the Markovian interruption into account, about the buffer behavior between the successive frames of slots. The validity of this analytical results has been verified by computer simulation.

The Fashion Professionals Required by the Ladies Apparel Manufacturers in Daegu (대구지역 숙녀복업계 기업주가 요구하는 패션전문인)

  • 김효은
    • Journal of the Korea Fashion and Costume Design Association
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    • v.4 no.1
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    • pp.111-130
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    • 2002
  • This study performed a structural questionnaire survey and non-structural interview of the ladies apparel manufacturers in Daegu on the qualification for the employees, skills required for job performance, job training, automatic manufacturing systems, and the use of computer. The results are as follows. 1. Almost all of the apparel manufacturing systems were Pair System, except one Line System in one company. In terms of outsourcing, most of the manufacturers answered “yes,” and in 1998 the outsourcing process was sewing, but in the year 2002, outsourcing has been increased :12 manufacturers(57.1%) outsourcing most of the processes except patterning, 3(14.3%) outsourcing the finish of sewing. 2. The workforce of 1998 and that of 2002 shows a significant difference(P<. 01) between office work and management. The number of office workers has decreased from 15 down to 5.3 people. On the other hand, that of the management has slightly increased from 5.3 to 9.2 people. The number of the manual workers has decreased from 32.2 to 28.7 people. And the number of tailoring and patterning workers has slightly decreased, but the number has increased in sewing from 3.7 to 7.0 people. 3. The wage of an employee shows a significant difference between a sewing assistant(P<. 01) and a production manager(P<. 05), and the wage of a sewing assistant, in particular, has slightly raised from ₩905,000 to ₩1,054,000. 4. The qualifications required of employees are “cooperative human relations”(30.8%), “diligence,” and “ability for job analysis”(26.9%), and “positive thinking” (15.4%) in 1998, and “ability for job analysis”(38.5%), “cooperative human relations”(34.6%), and “positive thinking” (15.4%) in 2002. The areas for job openings are significantly different(P<. 01) depending on the year. Job openings in the design section has increased from 1(3.8%) to 16 manufacturers (61.5%), and decreased in tailoring section from 22(84.6%) to 2 manufacturers(7.7%). Job openings in the sewing section have increased form 2(7.7%) to 6 manufacturers (23.1%). In terms of sex of the employees, there is a significant difference(P<. 001). 19 companies(73.1%) wanted “male” in 1998, but 8 companies(30.8%) answered that they want “female” and 17 companies(65.4%) answered that “it does not matter.” About the educational background, there was a significant difference between the years. The number of the companies that want junior college graduates with an associate degree has increased(15 companies(57.7%). There was a significant difference(P<. 05) in major of the employee. The number of the companies that want fashion majors has increased from 5(19.2%) to 20(76.9%). 5. In terms of job skills required, there was no significant difference. In 1998, “production skills” (46.2%) and “ability for job analysis” (26.9%) were required, and in 2002, “ability for job analysis” (42.3%) and “emotional skills” (26.9%). 6. In regard to training for job skills, “fashion professional training” has slightly decreased from 65.4% in 1998 to 46.2% in 2002, however, “training for job analysis” has slightly increased from 30.8% in 1998 to 46.2% in 2002, which indicates the fact that “fashion professional training” and “ability for job analysis” have been emphasized. 7. The number of the manufacturers purchased apparel CAD has increased from 1(3.8%) to 3(11.5%), and the number of the manufacturers that have no plan for purchase has increased from 16(61.5%) in 1998 to 15(57.7%), still taking up a big proportion. 8. About the use of computers in manufacturing, there is a significant difference(P<. 05). The number of the manufacturers using computer has increased from 5(19.2%) to 15(57.7%) and that of the manufacturers which do not use computers has decreased from 17(57.7%) to 8(30.8%). 9. In the interviews with the owners of the manufacturers, they pointed that schools should give more weight on practical training courses, the invitation of experts in the specific field, complex production systems, training courses for sewing, field trip courses, and furthering specialty education, personality and vocational education.

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