2017년 미국 DOE 주도하에 수행된 국제공동 복합모드운반시험 중 도로트럭운반시험, 연안항해시험, 대서양항해시험에서 측정된 가속도 및 변형률 데이터를 분석하였다. 먼저 각 운반모드 별로 발생한 하중이 전달경로에 따라 하중이 증폭되는지 감쇄되는지가 조사되었다. 그 결과 운반모드 및 하중경로 내 어떤 부분이냐에 따라 발생한 하중이 모의핵연료집합체에 전달되는 특성이 다름을 확인하였다. 그리고 변형률 데이터를 분석하여 육상 및 해상운반동안 발생한 변형률이 사용후핵연료에 건전성에 미치는 영향을 파악하였다. 그 결과 측정된 변형률은 사용후핵연료의 건전성에는 영향을 미치지 못하는 정도로 작은 크기임을 확인하였다. 본 연구에서 분석된 가속도와 피로평가 결과는 예정된 국내 정상운반시험조건에서의 운반시험에 유용한 기초자료로 활용될 것이다.

The purpose of this study is to provision the standard method for ensuring the reliability of measuring indoor air quality in public transportation. The objective is to determine the difference in the measured concentration values according to various conditions. These variables include measurement conditions, measurement equipment, measurement points, and measurement time. The value differences are determined by measuring the PM10 and CO2 concentration of subways, and express buses and trains, which are targets of indoor air quality management. The concentration of CO2 was measured by the NDIR method and that of PM10 was measured by the gravimetric method and light-scattering method. Statistically, the results of the concentration comparison according to the measurement points of the public transportation modes were not significantly different (p > 0.05), and it is deemed that the concentration is not affected by the measurement points. In terms of the concentration analysis results according to the measurement method, there was a difference of the concentration between the gravimetric and light scattering method. In the case of the light scattering method, the concentration differed depending on whether it was corrected with standard particles in the laboratory environment.

PURPOSES : The purpose of this study is to analyze the improvement effect of the distributed arrangement of a vehicle base, which is a policy on maximizing the cost efficiency and timely/spatial effectiveness of special transportation system (STS) operation for improving the mobility of the elderly and disabled. METHODS: (1) The characteristics of the current distributed arrangement of an STS vehicle base in an urban area was analyzed. (2) The quantitative improvement effect was derived by analyzing the actual measurement of operation during STS distributed arrangement test operation in Namyangju city. RESULTS : (1) Cities with large area and populations, which have a distributed living zone in an urban area, have a higher distributed arrangement ratio than urbanized smaller cities. (2) Based on the effectiveness analysis of the STS distributed arrangement test operation, the total travel time and distance decreased. CONCLUSIONS : (1) For the STS distributed arrangement, parking spots, driver standby, and restrooms must be prepared. Facilitating STS as a public institution consignment makes it easier to secure a vehicle base and management by utilizing public facilities. (2) Implementing the STS distributed arrangement of vehicle base allows for efficient response to demand through effective management of vehicles, which eventually decreases travel time and distance. This decrease not only reduces management costs but also increases supply expansion without an increase in the number of vehicles.

본 연구에서는 최근 개발중인 360 다발 장전용량의 중수로 사용후핵연료 운반용기에 대한 설계기준연료의 방사선원항 평가와 용기외부에서의 방사선량률 계산을 수행하였다. 그리고 국·내외 방사선적 안전성평가와 관련한 기술기준 부합여부를 판단하고 결과의 적합성을 제시하였다. 방사선원항으로 작용하는 설계기준연료 선정을 위해 월성원전에서 운영중인 운반 용기 및 두 가지 방식의 건식저장시설에 적용된 설계기준연료의 사양 및 특성을 조사하였다. 각 운반·저장 시스템 별 설계 기준연료의 연소도, 최소 냉각기간 및 중간저장시설로의 운반시점 등을 바탕으로 연소도 7,800 MWD/MTU와 최소 냉각기 간 6년을 설계기준연료로 설정하였다. 설계기준연료의 방사선원항은 SCALE 전산코드의 ORIGEN-ARP모듈을 이용하여 평가하였다. 운반용기의 방사선차폐평가는 MCNP6 전산코드를 이용하였으며, 기술기준에서 요구하는 운반용기 외부에서의 방사선량률 평가를 정상 및 사고조건으로 구분하여 수행하였다. 방사선량률 평가결과, 정상운반조건의 운반용기 표면 및 운반용기 표면 2 m 이격지점에서 계산된 최대 방사선량률은 각각 0.330 mSv·h-1와 0.065 mSv·h-1로 도출되어 선량률 제한치인 2.0 mSv^hr-1와 0.1 mSv^hr-1를 모두 만족하는 결과를 도출하였다. 또한 운반사고조건하 운반용기 표면 1 m 지점에서의 최대 방사선량률은 0.321 mSv·h-1로서 기술기준인 10.0 mSv·h-1 미만으로 평가되어, 대용량 중수로 사용후핵연료 운반용기는 방사선적 안전성을 확보하는 것으로 나타났다.

Halal transportations will ensure that the Halal status of the products will be preserved. Halal certification is believed to increase the operation cost for the transport providers, which reflect the price paid by customers who choose to buy products transported by Halal transportation. Hence, it is worthwhile to investigate the willingness of Muslim consumers to pay extra for the Halal transportation cost. The study aims to identify factors influencing Muslim consumers’ attitude towards their willingness to pay for Halal transportation. Using the stimulus-organism-response model, attitude which represents the organism factor will be treated as a mediator for variables representing the stimulus factors and the variable for the response. On the other hand, the study will also examine the effect of knowledge as a moderating factor. The data was collected from Muslim consumers in Kuala Lumpur. Applying the purposive sampling method with a self-administered survey, 202 respondents agreed to participate in the study. The findings revealed that awareness and perceived behavioural control are a stimulus towards attitude, and attitude is a significant organism on willingness to pay. The study also found that attitude mediates the relationship between awareness and perceived behavioural control towards the willingness to pay for Halal transportation. Additionally, the knowledge has a moderating effect of the relationship between attitude and the willingness to pay. The findings of the study are not only beneficial for the Muslim community in Malaysia, but also the Muslims around the world.

PURPOSES: This study identifies the policy changes in road infrastructure over the last 30 years, and rates user satisfaction using opinion mining techniques. METHODS: First, we collected a text data set of the keyword 'road transport services' from media articles published between January 1, 1990 and June 10, 2019 that were managed by the Korea Press Foundation. Next word frequencies were analyzed to extract keywords relating to important policy issues. Moreover, to ensure changes in user satisfaction level with the road infrastructure, sentimental analysis was used. RESULTS : The results indicate that policy issues changed significantly every 5 years. Public opinion on newly introduced advanced technology in road transportation was generally positive, and user satisfaction gradually increased with time. CONCLUSIONS: Prior to the implementation of new technologies in road transport services, public opinion must be surveyed to ensure that the mobility policies are convenient and satisfactory.