Article
Chemistry, Physical
Ling Fu, Longbin Yan, Long Lin, Kun Xie, Linghao Zhu, Chaozheng He, Zhanying Zhang
Summary: The study investigates the catalytic potential of Fe-embedded Au (111) monolayer for N2 fixation, demonstrating its ability to activate inert N2 molecules and identifying the limiting step of the N2 reduction reaction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Mathematics
Eli Berger, Paul Seymour, Sophie Spirkl
Summary: The algorithm provided can determine whether there is an induced uv-path longer than the shortest uv-path in the graph, and it runs in polynomial time.
DISCRETE MATHEMATICS
(2021)
Article
Engineering, Electrical & Electronic
Nina Wiedemann, David Adjiashvili
Summary: This study proposes a framework that utilizes mathematical optimization algorithms to compute globally optimal routes for large-scale power infrastructure construction projects in the energy supply system. The aim is to minimize resistances posed by multiple stakeholders. Through the introduction of various algorithms and methods, the framework achieved promising results in the research validation.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2022)
Article
Computer Science, Information Systems
Sofiane Abbar, Rade Stanojevic, Mashaal Musleh, Mohamed ElShrif, Mohamed Mokbel
Summary: QARTA is an open-source, highly accurate and scalable map service system that utilizes machine learning techniques to construct its own map and calibrate query answers based on contextual information. The demo showcases the efficiency and accuracy of QARTA in real-world applications.
PROCEEDINGS OF THE VLDB ENDOWMENT
(2021)
Article
Green & Sustainable Science & Technology
Wei Zhou, Yan Zhuang, Yan Chen
Summary: With the rapid economic growth, the Chinese government is actively taking measures to improve atmospheric emission efficiency in response to the increasing demand for environment and atmospheric qualities. This study uses the non-radial DEA model and the PS convergence test to analyze the spatial convergence characteristics and changing trends of atmospheric emission efficiency in China. The findings show that there is room for further improvement in China's overall atmospheric emission efficiency, and it is positively related to regional economic development. The study also reveals unbalanced and regional distribution characteristics of atmospheric emission efficiency, and a decreasing trend in its transfer path, indicating gradual improvement in China's atmospheric environment.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Multidisciplinary Sciences
Mina Asaduzzaman, Tan Kim Geok, Ferdous Hossain, Shohel Sayeed, Azlan Abdaziz, Hin-Yong Wong, C. P. Tso, Sharif Ahmed, Md Ahsanul Bari
Summary: Our proposed algorithm is more efficient in finding the shortest path among multiple destination items with minimal weight, compared to both the single source single destination and modified multi-destinations of Dijkstra's algorithm.
Article
Computer Science, Information Systems
Mengxuan Zhang, Lei Li, Xiaofang Zhou
Summary: Shortest path computation is essential for network applications, and the Dynamic Shortest Path (DSP) problem has garnered significant attention. Researchers identified dimensions of the DSP problem and evaluated state-of-the-art methods systematically in dynamic networks. The results can guide choosing the best solution during system implementation.
PROCEEDINGS OF THE VLDB ENDOWMENT
(2021)
Article
Engineering, Mechanical
Xiangqiao Yan
Summary: The empirical fracture equation for mixed mode crack proposed in this note has been verified to be simple in computation and high in accuracy based on test data from literature.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
Yi Zou, Yuncai Liu
Summary: This paper investigates human dynamics in the computer vision field and proposes a two-part motion model based on the shortest path principle. It successfully simulates pedestrian movement behaviors and reconstructs crowd motions.
APPLIED SCIENCES-BASEL
(2022)
Article
Multidisciplinary Sciences
Ibukun Eweoya, Senanu R. Okuboyejo, Oluwole A. Odetunmibi, Babafemi O. Odusote
Summary: This study investigated the acceptance and adoption of e-agriculture in Nigeria, revealing that performance expectancy, effort expectancy, social influence, and habit were significant factors influencing behavioral intention, with performance expectancy being the most influential in the usage of e-agriculture. New factors such as quality of service, privacy concerns, and enhanced farmer support could be considered in future research.
Article
Mathematics
Okan Bulut, Jinnie Shin, Damien C. Cormier
Summary: The use of computerized formative assessments in K-12 classrooms provides valuable data for learning analytics systems to generate actionable insights for teachers and school-based professionals. However, the lack of guidelines on the timing, number, and frequency of assessments often leads to rigid and ineffective testing schedules. This study proposes an intelligent recommender system (IRS) based on Dijkstra's shortest path algorithm to optimize the assessment schedule for each student based on their reading progress. The IRS was found to reduce the number of unnecessary test administrations and produce meaningful recommendations even under extreme growth trajectories.
Article
Engineering, Geological
Xueyi Shang, Caiyun Liu, Xibing Li, Linqi Huang
Summary: Acoustic emission/microseismic (AE/MS) source location is crucial for safety monitoring of circular hole-contained structures. Traditional methods have limitations in obtaining accurate P-wave travel paths and source locations. This study proposes an analytical solution-based shortest P-wave travel path and a grid search-based AE/MS event source location method, considering the P-wave arrival time system error. Synthetic tests and pencil-lead break (PLB) application tests demonstrate the superior performance of the proposed methods. The average location errors of PLB events in different circular hole-contained structures are smaller than those obtained using traditional algorithms.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Yannick Kergosien, Antoine Giret, Emmanuel Neron, Gael Sauvanet
Summary: This paper proposes an exact algorithm to solve the one-to-one multiobjective shortest path problem, motivated by a real application for cycling itineraries, and validates its efficiency and performance through computational experiments.
INFORMS JOURNAL ON COMPUTING
(2022)
Article
Public, Environmental & Occupational Health
Junhui Han, Xiaoqiong Zhao
Summary: Based on the data of the Chinese General Social Survey in 2017, this study found that Internet use can improve health levels in different dimensions, with more pronounced effects on those with senior high school education or above, the elderly, and men. Information, leisure, and social preferences were identified as important mechanisms through which Internet use promotes physical, mental, and social health.
FRONTIERS IN PUBLIC HEALTH
(2021)
Article
Transportation Science & Technology
Pramesh Kumar, Alireza Khani
Summary: Research shows that transit-based ridesharing can effectively solve the last mile problem for suburban commuters and save a significant amount of vehicle hours in the system.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2021)
Editorial Material
Transportation
Ahmed El-Geneidy, David Levinson
Article
Environmental Studies
Xia Zhao, Mengying Cui, David Levinson
Summary: This study investigates the temporal variability in travel patterns of over 3.3 million passengers in public transit in Beijing over 120 days. The results show that commuters and non-commuters exhibit different patterns in terms of travel distance and coverage, and commuters are less affected by the day of the week. Moreover, travel distance and frequency increase faster and more linearly than space-coverage features.
ENVIRONMENT AND PLANNING B-URBAN ANALYTICS AND CITY SCIENCE
(2023)
Article
Engineering, Civil
Yuning Wang, Duanfang Lu, David Levinson
Summary: This article provides a quantitative analysis of land use mix changes around the rail transit system in Tianjin, China. The study shows that rail transit increases land use mix in previously low-mixed areas, while the change is not significant in already diverse areas. It also reveals that station areas with higher land use dominance experience more balanced development, while areas with lower land use dominance intensify their leading functions. The findings contribute to understanding how rail transit planning can address differentiated development in cities.
Article
Geography
Yingshuo Wang, Bahman Lahoorpoor, David M. Levinson
Summary: This study examines the evolution of the Sydney tram network using network econometrics approaches. The results show that complementary and competitive links have distinct roles in shaping the network structure.
GEOGRAPHICAL ANALYSIS
(2023)
Article
Transportation
Ang Ji, Mohsen Ramezani, David Levinson
Summary: This study presents a model for lane-changing events, consisting of two interconnected phases: 'stay' and 'execution'. The model incorporates stochastic duration of the 'stay' phase based on external traffic conditions, and models the 'execution' phase using longitudinal speed profiles. Bayesian survival analysis is used to predict the probability of the stay duration before a new execution phase, addressing the censoring issue. Using real-world vehicle trajectory data, the study identifies factors influencing driver behavior in lane-keeping and lane-changing execution, such as surrounding conditions, lane-changing purpose, directions, and departure lanes. The findings highlight the impact of urgency and patience on lane-changing decisions, as well as the influence of distances and relative speeds with surrounding vehicles on acceleration behavior during the execution phase.
TRANSPORTMETRICA B-TRANSPORT DYNAMICS
(2023)
Article
Transportation Science & Technology
Ang Ji, Mohsen Ramezani, David Levinson
Summary: A lane-changing pricing scheme is proposed to penalize risky and aggressive lane changes on highways, reducing congestion and improving driving safety. The scheme models driver behavior using game theory and identifies optimal lane-changing strategies. Through calibration and validation with real-world vehicular trajectory data, the model is found to be effective. Two types of lane-changing tolls are introduced to align individual preferences with social benefits, achieving a "win-win" situation by reducing aggressive lane changes and compensating delayed drivers.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2023)
Article
Transportation
Yadi Wang, David Levinson
Summary: This study investigates the decision-making process in transport investment, comparing the robustness and viability of the selected option with rejected alternatives. The findings suggest substantial opportunity costs of rejecting more economical alternatives, as well as concerns about the assessment framework and declining consideration of alternatives over time. The study also highlights concerns about selection bias and discrimination in early-stage appraisal and decision-making.
TRANSPORTATION RESEARCH INTERDISCIPLINARY PERSPECTIVES
(2023)
Article
Environmental Sciences
Manman Li, Mengying Cui, David Levinson
Summary: This study investigates the spatial dependency of job and worker densities for the Minneapolis-St. Paul metropolitan area using census block level data from 2002 to 2017. A spatial weight matrix, known as the correlation matrix, is proposed to detect variations of dependencies among spatial units in both direction and level. The superior performance of the correlation matrix is demonstrated through spatial regression models in predicting land use patterns compared to the conventionally used adjacency matrix and accessibility matrix.
Article
Engineering, Civil
Haotian Wang, Emily Moylan, David Levinson
Summary: This study aims to find a strategy to capture the most observed trajectories using a minimum number of algorithms. GPS information from 4,538 real trips in Minneapolis-St. Paul in 2008 was collected and analyzed. The study combines labeling and link penalty approaches to generate alternatives based on observed or free-flow speed.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Multidisciplinary Sciences
Hamish Turner, Bahman Lahoorpoor, David M. Levinson
Summary: This study uses map digitization technology to create a historic dataset of road opening dates in Sydney. By georeferencing and analyzing historic maps, spatial data is extracted and placed in a collective vector layer. The study finds that about half of the road links in a significant area of Sydney were already open by the start of the twentieth century, and another half opened within a thirty-year period. The project establishes the foundation for a historic road dataset for Sydney and provides methods and procedures to further develop the dataset.
Article
Transportation
Yang Gao, David Levinson
Summary: This study presents a comprehensive analysis of the relationship between congestion and lane changing. The results show that lane changing does not bring significant speed benefits in most cases, and the relationship between lane change rate and speed depends on the purpose of the lane changes. The study also demonstrates a mutual causality relationship between lane changing and congestion, especially in general areas during peak periods.
COMMUNICATIONS IN TRANSPORTATION RESEARCH
(2023)
Article
Environmental Studies
Jiaoe Wang, Jie Huang, Haoran Yang, David Levinson
Summary: This study analyzes travel records in Kunming, China, and finds that the recovery of public transport use has been slow, with urban mobility showing a strengthened revisiting tendency. The study also highlights the differences in travel behavior resilience among different groups.
NPJ URBAN SUSTAINABILITY
(2022)
Article
Transportation
Hema S. Rayaprolu, Hao Wu, Bahman Lahoorpoor, David Levinson
Summary: This study adopts an Access-Oriented Design (AOD) framework to optimize transit network design. It presents a method to evaluate the best combination of local and express alternative transit system designs through the concept of 'iso-access lines'. It determines the optimal combination by generating 'iso-access' lines and applying production-theory principles.
JOURNAL OF PUBLIC TRANSPORTATION
(2022)
Article
Urban Studies
Bahman Lahoorpoor, Hao Wu, Hema Rayaprolu, David M. Levinson
Summary: This research focuses on prioritizing network investment in a suburban area with a poorly connected street network to improve walking and biking accessibility. The study proposes a systematic approach to designing and prioritizing potential links for active travel in the suburban environment. Results show that links with the highest added access per unit of cost have the greatest impact if all links are built, but the network structure around the point of interest can affect the order. The study also highlights the importance of sequencing potential links to optimize network usage.
TEMA-JOURNAL OF LAND USE MOBILITY AND ENVIRONMENT
(2022)
Article
Economics
Yadi Wang, David Levinson
Summary: The current practice of benefit-cost analysis is questioned and criticized, leading to the proposal of an alternative approach called access-based land value benefit assessment. This assessment method is applied to analyzing the Second Avenue Subway project in Manhattan, New York. The findings show that the actual travel time saving is lower than forecasted, there is a strong positive correlation between residential property value and job accessibility by transit, and the appreciation in property value exceeds the project cost, supporting the decision to construct the Second Avenue Subway.
JOURNAL OF BENEFIT-COST ANALYSIS
(2022)
