Article
Environmental Sciences
Minseok Kim, Ciaran J. Harman
Summary: This research presents a theoretical framework that links transit time distributions (TTDs) and StorAge Selection (SAS) functions to hydraulic groundwater theory at the hillslope scale. The framework is validated through idealized virtual hillslopes and tracer experiments in artificial hillslopes. The results show that the framework can explain and predict characteristics of hydrologic systems, and several dimensionless numbers are proposed for classifying hillslope scale flow and transport dynamics.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Civil
Matan E. E. Singer, Aviv L. L. Cohen-Zada, Karel Martens
Summary: The traditional assessment of transport systems has focused on congestion and ridership, but fails to consider the service people actually seek - the ability to reach destinations. This paper contributes to the accessibility literature by applying a people-centered approach and proposing the Accessibility Sufficiency Index (ASI) as a performance standard. Regression analyses show that transit system performance is shaped by transit vehicle revenue miles, mixed land uses, and activity centering, with the size of these effects varying by the sufficiency threshold employed. These findings have implications for transport evaluation and our understanding of factors affecting performance.
Article
Business, Finance
Siqi Liu, Chao Yin, Yeqin Zeng
Summary: The study shows a negative relationship between abnormal investment and future stock performance, driven primarily by under-investment rather than over-investment. Results remain consistent across various estimation methods and investment models. Delayed market reaction and agency issues contribute to the apparently anomalous return predictability of under-investment.
INTERNATIONAL REVIEW OF FINANCIAL ANALYSIS
(2021)
Article
Environmental Studies
Elnaz Yousefzadeh Barri, Steven Farber, Anna Kramer, Hadi Jahanshahi, Jeff Allen, Eda Beyazit
Summary: This article explores the statistical relationship between transit use and transit accessibility by household income and vehicle ownership in the Greater Toronto and Hamilton Area. It finds that low-income households with one or more cars per adult have the most elastic relationship between transit accessibility and transit use, and improving public transit can increase transit ridership among car-owning low-income households.
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
(2021)
Review
Transportation
Farah A. A. Awad, Daniel J. J. Graham, Laila AitBihiOuali, Ramandeep Singh
Summary: In recent years, there has been significant growth in the literature on performance measurement in public transit systems, focusing on financial and quality-of-service aspects. The shift towards considering quality-of-service as an important performance measure is evident, given its impact on ridership. However, there is a gap in the literature due to the segmentation of these two performance aspects and their interdependencies. This study provides a comprehensive review of methodologies and empirical findings on both aspects, highlighting the importance of linking cost efficiency and service quality.
Article
Engineering, Electrical & Electronic
A. Sivaprakasam, Naveen Kumar Elangovan
Summary: This study examines the effect of CdS-based electron transport layer on the performance of perovskite solar cell, achieving a good power conversion efficiency of 11.69% with the CdS/CH3NH3PbI3/Spiro-OMeTAD device structure grown for 10 minutes. The study also discusses the impact of various factors such as microstrain, dislocation density, and series resistance on the photovoltaic performance of perovskite solar cells.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Liyu Wang, Fang Lu, Baoming Han, Qi Zhang, Chen Zhang
Summary: It has been established that the development of urban rail transit (URT) is crucial in alleviating traffic problems in large cities, and transportation efficiency plays a vital role in the scientific planning, construction, operation management, and sustainable development of URT. This study focuses on the transport efficiency of URT networks and creatively applies shadow efficiency theory to effectively combine factors such as passengers, capacity, and efficiency. A quantitative calculation method for system utility based on double time penalty is proposed. By considering the characteristics of Beijing URT, this study presents a single optimization strategy and a combinatorial optimization strategy, and analyzes the results using DEA. The simulation of the Beijing subway network confirms the validity of the method and its optimization effects.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Baohai Jia, Yi Huang, Yan Wang, Yeshiyuan Zhou, Xiaodie Zhao, Suiting Ning, Xiao Xu, Peijian Lin, Zhiquan Chen, Binbin Jiang, Jiaqing He
Summary: Controlling vacancies in thermoelectric materials improves performance and stability.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Mathematics, Applied
Zeljko Stevic, Smiljka Miskic, Dragan Vojinovic, Eldina Huskanovic, Miomir Stankovic, Dragan Pamucar
Summary: This study developed an integrated model to determine the efficiency of transport companies. Multiple methods, including Data Envelopment Analysis and Principal Component Analysis, were used. The results showed that the highest efficiency was achieved in the period of 2014-2017.
Article
Geography
Anastassios Dardas, Brent Hall, Jon Salter, Hossein Hosseini
Summary: This article presents the development of a Geographical Information Systems (GIS) workflow that collects high-volume and high-frequency near real-time data from a public General Transit Feed Specification (GTFS) and calculates metrics for assessing on-time and route speed performance of a public transit system. The approach is applied to data collected in Calgary, Canada using Azure Virtual Machines and Python/ArcGIS API libraries. A Web GIS application is also described that visualizes the performance results in spatiotemporal form by querying data from MongoDB. The workflow and application aim to provide actionable information to transit planners for improving public transportation systems and can be applied to similar GTFS data from other cities.
TRANSACTIONS IN GIS
(2022)
Article
Green & Sustainable Science & Technology
Vivienne Schnorf, Evelina Trutnevyte, Gillianne Bowman, Vanessa Burg
Summary: The main barrier to biomass transport in Switzerland is cost rather than energy or emissions performance. Transport of forest wood is more efficient than transport of manure.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Xianwei Zeng, Zheng Ma, Wang Li, Boyu Yang, Yongxin Qian, Yubo Luo, Junyou Yang, Yong Liu, Qinghui Jiang
Summary: We utilized entropy engineering to create advanced thermoelectric materials with optimized energy bands and microstructures, achieving high conductivity and a low thermal conductivity. Incorporating Yb and Pb improved the electrical properties, resulting in a remarkable ZT value. In multi-legged devices, we achieved a maximum efficiency of -10%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yanru Guo, Xue Liu, Huaxin Wang, Zhigang Zang, Ru Li
Summary: Accurate many-body perturbation theory-based calculations were conducted to investigate the electronic and excitonic properties of lead-free quaternary antiperovskite Ca6N2AsSb; significant quasiparticle band gap renormalization, strong optical absorption, low exciton binding energy, and high efficiency of >32% with a thickness of 500 nm were predicted.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Peiyao Xue, Jingming Xin, Guanyu Lu, Boyu Jia, Heng Lu, Guanghao Lu, Wei Ma, Ray P. S. Han, Xiaowei Zhan
Summary: This study investigated the performance evaluation parameters of semitransparent organic solar cells (ST-OSCs), namely, the average visible transmittance (AVT) and power conversion efficiency (PCE). By reducing the donor content, light absorption in the visible region can be decreased and the AVT values of ST-OSCs can be increased. However, a lower donor content affects exciton generation, exciton dissociation, and charge transport, thereby limiting the PCEs of the cells.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Green & Sustainable Science & Technology
Joana R. Gouveia, Margarida Goncalves, Ricardo Rocha, Antonio J. Baptista, Helena Monteiro
Summary: This study focuses on characterizing the production process of a composite sandwich panel for aircraft structures, comparing hot-press and autoclave curing alternatives. A comprehensive assessment using the Total Efficiency Framework was conducted to support manufacturing decision-making by combining process efficiency and environmental performance analyses. The study provides rare inventory data on materials, energy consumption, and process operation for composite panel production, which were used to quantify process efficiency and estimate potential environmental impacts. The results indicated that autoclave curing outperformed hot-press in terms of efficiency, eco-efficiency, and environmental performance.
SUSTAINABLE PRODUCTION AND CONSUMPTION
(2022)
Article
Economics
Valeria Bernardo, Xavier Fageda, Jordi Teixido
Summary: The study finds that flight ticket taxes have a significant impact on low-cost airlines' supply and carbon emissions, resulting in a decrease of 12% in the number of flights and a 14% reduction in carbon emissions. Additionally, the burden of the taxes is higher for passengers paying low fares, affecting avoidable flights more significantly.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Xingxing Fu, Dea van Lierop, Dick Ettema
Summary: This study investigates the relationship between multimodality and perceived transport adequacy and accessibility. The results show that multimodality is burdensome, especially for car-dependent individuals, and leads to lower perceived achievement or accessibility for those with limited access to a car.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Henrik Johansson Rehn, Lars E. Olsson, Margareta Friman
Summary: This paper presents the Framework of RoUtIne Transitions in daily travel (FRUIT), which analyzes the impact of life events on travel behavior changes and identifies the critical phases in this process. By integrating theories and concepts, the framework provides a theoretical basis for interventions aimed at improving sustainable travel. The applicability of FRUIT is illustrated through an empirical case, and the implications for future research and policy are discussed.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Peng-Cheng Xu, Qing-Chang Lu, Chi Xie, Taesu Cheong
Summary: This study investigates the resilience evaluation of interdependent networks. A model is developed to quantify the impacts of network interdependency on the resilience of interdependent transit networks, considering interdependency relations, network topology, flow characteristics, and demand distribution. The model is applied to the metro and bus networks of Xi'an, China. Results show that node degree heterogeneity in topology, bidirectional function dependency among networks, and flow matching between networks are important factors influencing network resilience.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Jeppe Rich, James Fox
Summary: Many transport models allocate all costs to the car driver without considering the cost sharing among passengers. This paper questions this premise and argues that cost sharing can occur in various forms, which should be properly accounted for in transport models. The empirical evidence from Denmark suggests that not accounting for cost sharing may result in biased cost elasticities and occupancy rates.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Jorik Grolle, Barth Donners, Jan Anne Annema, Mark Duinkerken, Oded Cats
Summary: High-speed rail is considered a promising alternative for long-distance travel, but the current state of the European HSR network is poorly connected. This study presents a customized version of network design and frequency setting problem for HSR, and analyzes the performance under various policies and design variables. The results show that considering externalities leads to more extensive networks and mode shifts, but requires high public investments. The importance of network integration and cross-border cooperation is highlighted. The findings aim to contribute to the design of an attractive and competitive European HSR network.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
Article
Economics
Mounisai Siddartha Middela, Gitakrishnan Ramadurai
Summary: This study addresses the research gaps in understanding the effect of regression models, measurement period, and spatial dependence on Freight Trip Generation (FTG) modeling and freight-related policies. The results show that the spatial Zero-Inflated Negative Binomial (ZINB) model is the best for daily and weekly Freight Trip Production (FTP), while the non-spatial Negative Binomial (NB) model is the best for daily and weekly Freight Trip Attraction (FTA). The study also highlights the importance of considering spatial dependence and using count models with a week as the measurement period.
TRANSPORTATION RESEARCH PART A-POLICY AND PRACTICE
(2024)
