• Journal of Korean Society of Transportation
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• v.34 no.5
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• pp.476-488
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• 2016

This study reviewed factors and causes that affect on reliability and accuracy of transportation demand forecasting. In general, the causes of forecasting errors come from variety and irregularity of trip behaviors, data limitation, data aggregation and model simplification. Theoretical understanding about the inevitable errors will be helpful for reasonable decision making for practical transportation policies. The study especially focused on traffic assignment with the KTDB data, and described the factors and causes of errors by classifying six categories such as (1) errors in input data, (2) errors due to spacial aggregation and representation method of network, (3) errors from representing values for variations of traffic patterns, (4) errors from simplification of traffic flow model, and (5) errors from aggregation of route choice behavior.

• Journal of Korean Society of Transportation
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• v.21 no.6
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• pp.89-99
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• 2003

Considering a path represented by a sequence of link numbers in a network, the vine is differentiated from the loop in a sense that any link number can be appeared in the path only once, while more than once in the loop. The vine provides a proper idea how to account for complicated travel patterns such as U-turn and P-turn witnessed nearby intersections in urban roads. This paper proposes a new algorithm in which the vine travel pattern can be considered for finding K number of sequential paths. The main idea of this paper is achieved by replacing the node label of the existing Yen's algorithm by the link label technique. The case studies show that the algorithm properly represent the vine travel patterns in searching K number of paths. A noticeable result is that the algorithm may be a promising alternative for ITS deployment by enabling to provide reasonable route information including perceived traveler costs.

• Journal of Korean Society of Transportation
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• v.26 no.6
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• pp.143-154
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• 2008

This paper considers option and non-use values of rail services. The total economic value of a given transport service can be classified into use, option and non-use values, other grouping rules can be applied though. The use value is the consumer's surplus from the actual rides of a specific mode. The option value, on the other hand, can be defined as a traveler's willingness to pay for reserving a travel mode, which is not his or her main choice, as a standby alternative. Finally, the non-use value represents benefits that are not attributable to the actual use or option use, but to the vicarious, altruistic, functional and existing worth of a transport service. A stated preference survey based on a double-bounded dichotomous choice is conducted. A survival model is applied to the data collected. Calculations of trip makers' willingness to pay for option and non-use values are based on the parameters of the estimated survival model. Some suggestions for transport appraisal are also presented.

• Journal of the Korean Society of Clothing and Textiles
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• v.35 no.3
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• pp.371-384
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• 2011

This study with 'trip' as a theme, aims to develop textile designs and fashion bags for travel which is widely applicable fitting traveler's T P O, applying Victor Vasarely's artwork. During the planning process of design, 'Whenever & Wherever's concept was set by analyzing fashion trend information in 2010-11 F/W proposed by Interfashion Planning and FCK; in addition, 'Bobos' were selected as research targets. It organized 4 images of 'Modern', 'Romantic', 'Classic' and 'Fantastic'. The motives are proposed textile design with '$Cross^2$', 'Falling Z', 'Cir-Classicism' and 'Skinny-holic' per each theme. The designs developed were printed out and into polyester canvas with a Polaris V6 DTP from dgen, Corp. Textile designs developed were applied for 'two-way' formed fashion bags for traveling with high practicality. Fashion bags for traveling consisted of big bags, tote bags, and hip sacks; a total of 12 works (4 sets per theme) were produced. This study sought practical plans for artworks by producing fashion goods through a DTP system. The results of this study can be used as guidelines for further studies and as a significant contribution to the creation of high values for exciting fashion products.

• Journal of Korean Society of Transportation
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• v.23 no.1
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• pp.83-92
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• 2005

This study if the first trial toward realizing a new methodology for vehicle re-identification based on heterogeneous sensor systems. A major interest of the author is how to effectively utilize information obtained from different sensors to derive accurate and reliable section travel times. The 'blade' sensor that is a newly developed sensor for capturing vehicle wheel information and the existing square loop sensor are employed to extract the inputs of the proposed vehicle re-identification algorithm. The fundamental idea of the algorithm developed in this study, which is so called 'anonumous vehicle re-identification,' it to match vehicle features obtained from both sensors. The results of the algorithm evaluation reveal that the proposed methodology could be successfully implemented in the field. The proposed methodology would be an invaluable tool for operating agencies in support of traffic monitoring systems and traveler information systems.

• Journal of Korean Society of Transportation
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• v.33 no.6
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• pp.520-530
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• 2015

This paper formulates the methodologies to estimate optimal congestion tolls from long-run and short-run perspectives and applies them to the highways of Seoul. An optimal long-run congestion toll is estimated with an optimal volume-capacity-ratio to minimize the total costs which consist of two components: road construction and maintenance costs and traveler costs. By contrast, an optimal short-run congestion toll is estimated with a supply-demand equilibrium which is determined by using a speed-flow function and a disaggregate modal choice model. The results of a long-run analysis for the Seobu urban expressway suggest the optimal volume-capacity-ratio of 1.35 and the optimal congestion toll of 503 Won per automobile kilometer. By contrast, those of a short-run analysis for the Mia-ro urban arterial suggest 1.31 and 420 Won, respectively. Although our results are to some degree dependent on the interest rate and time value assumed, one basic conclusion holds up: the congestions toll tested could generate substantial gains in social welfare if applied to Seoul.

• Korea Trade Review
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• v.46 no.3
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• pp.185-201
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• 2021

This paper analyzes the penalty tax system under the Customs Act of Korea and examines whether the penalty tax provision violate the constitutional principle of proportionality when imposed on a person who does not made import declaration intentionally or travelers who has not been made an import declaration of their carry-on items. It examines the provisions that adopt a penalty tax as a means to secure the effectiveness of the customs law. In relation to penalty tax, the case studies of the Supreme Court and Constitutional Court of Korea are analyzed by major issues such as the legal nature of the penalty tax, whether the penalty tax is unconstitutional, and the reasons for exemption from the penalty tax. There is no reasonable basis for the high penalty tax imposed on travelers' carry-on items for which import declaration has not been made. It is necessary to unify the penalty tax imposed when an import declaration is not made and the penalty tax on traveler's carry-on items. It is necessary to establish a limit on penalty tax and to create new regulations to exempt or reduce penalty tax when punished by administrative punishment to avoid double jeopardy. It is necessary to effectively secure the effectiveness of the Customs Act by converting the penalty tax into civil penalty that does not presuppose the faithful and accurate performance of tax obligations by the taxpayer. The government revised the penalty tax system in the Customs Act in 2019, but there are still many types of penalty tax and there are elements that are unconstitutional. It seems that the Korean government should lower the burden on the people by improving the system for the penalty tax system.

• Journal of Korean Society for Quality Management
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• v.52 no.1
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• pp.1-21
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• 2024

Purpose: This study seeks to explore the impact of COVID-19-induced boredom, a prevalent form of pandemic-related stress, on travel motivation and post-pandemic travel intentions. Additionally, it examines the interplay among travel motivation, travel constraints, and the willingness to pay more for travel experiences in the post-pandemic context. Methods: A PLS-SEM analysis was conducted to analyze the data. Data collection took place through an online survey in February and March 2021, with a total of 575 respondents participating. Participants provided responses regarding their current levels of boredom due to COVID-19, five different travel motivations, seven travel constraints, and their post-pandemic travel intentions. Additionally, participants were asked about their willingness to pay more for travel. Results: This study highlights the significant role of COVID-19-induced boredom in predicting post-pandemic travel intentions and the willingness to pay more for travel. Contrary to previous perceptions, boredom emerges as a driving factor, enhancing travel intentions during the pandemic. Additionally, relaxation becomes the primary motivation for travel during COVID-19, and structural constraints exert a noticeable impact on travel intentions, challenging previous assumptions. Stress levels directly influence the willingness to pay more during travel experiences, expanding the understanding of additional payment behavior in the context of travel. Conclusion: This study offers practical insights for tourism stakeholders. Recognizing and addressing boredom in marketing strategies, implementing aggressive additional payment options, and focusing on relaxation-oriented travel products are recommended to cater to post-pandemic traveler preferences and revive the tourism industry effectively.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.6
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• pp.1033-1041
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• 2017

Path travel time based on departure time (PTTDP) is key information in advanced traveler information systems (ATIS). Despite the necessity, forecasting PTTDP is still one of challenges which should be successfully conquered in the forecasting area of intelligent transportation systems (ITS). To address this problem effectively, a methodology to dynamically predict PTTDP between motorway interchanges is proposed in this paper. The method was developed based on the relationships between traffic demands at motorway tollgates and PTTDPs between TGs in the motorway network. Two different data were used as the input of the model: traffic demand data and path travel time data are collected by toll collection system (TCS) and dedicated short range communication (DSRC), respectively. The proposed model was developed based on k-nearest neighbor, one of data mining techniques, in order for the real applications of motorway information systems. In a feasible test with real-world data, the proposed method performed effectively by means of prediction reliability and computational running time to the level of real application of current ATIS.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.613-621
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• 2009

Except for traditional industrial art and history of design development, Korea jewelry industry before 1980's, had little meaning in the aspect of marketing and business. Domestic jewelry market which have changed from the value of goods to value of ornaments, faced important transition point for jewelry industry by the chance of in Asian Game held in 1986, and money of overseas traveler after 1980s. The rapidly-grown Jewelry field by the introduction of detail casting method to make it possible mass-production of the products before 1990's, began to change into new system, with introducing CAD/CAM after 1990's. Jewelry industry has changed from manual work called handmade to the detail casting industry based on master for mass-production. For this, the development of master, with the design development, have been suggested as important task to jewelry industry firms, and by the introduction of CAD/CAM, the diversification of design and master development has been made up. In this study, we would try to find out current status of domestic jewelry field and to understand CAD/CAM, and advantage of CAD/CAM, and through this, suggest good solution to precipitate domestic jewelry market.