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Human mobility studies how people move among meaningful places over time and how these movements aggregate into population-level patterns that shape accessibility, congestion, emissions, and public health. Large language models (LLMs) are…

Human-Computer Interaction · Computer Science 2026-03-16 Jie Gao , Yaoxin Wu

Although recent tool-augmented benchmarks involve complex requests, evaluation remains limited to answer matching, neglecting critical trajectory aspects like efficiency, hallucination, and adaptivity. The most straightforward method for…

Artificial Intelligence · Computer Science 2026-05-26 Wonjoong Kim , Sangwu Park , Yeonjun In , Sein Kim , Dongha Lee , Chanyoung Park

Parks play a crucial role in enhancing the quality of life by providing recreational spaces and environmental benefits. Understanding the patterns of park usage, including the number of visitors and their activities, is essential for…

Multiagent Systems · Computer Science 2025-03-12 Tanvir Rahman

Location data collection has become widespread with smart phones becoming ubiquitous. Smart phone apps often collect precise location data from users by offering \textit{free} services and then monetize it for advertising and marketing…

Computers and Society · Computer Science 2025-02-11 Naman Awasthi , Saad Mohammad Abrar , Daniel Smolyak , Vanessa Frias-Martinez

As more and more robots are envisioned to cooperate with humans sharing the same space, it is desired for robots to be able to predict others' trajectories to navigate in a safe and self-explanatory way. We propose a Convolutional Neural…

Artificial Intelligence · Computer Science 2021-09-01 Dapeng Zhao

Increasing and massive volumes of trajectory data are being accumulated that may serve a variety of applications, such as mining popular routes or identifying ridesharing candidates. As storing and querying massive trajectory data is…

Databases · Computer Science 2023-12-14 Zheng Wang , Cheng Long , Gao Cong , Christian S. Jensen

In currently available literature, no tracking-by-detection (TBD) paradigm-based tracking method has considered the localization confidence of detection boxes. In most TBD-based methods, it is considered that objects of low detection…

Computer Vision and Pattern Recognition · Computer Science 2023-09-19 Ting Meng , Chunyun Fu , Mingguang Huang , Xiyang Wang , Jiawei He , Tao Huang , Wankai Shi

Recent advances in sensor and mobile devices have enabled an unprecedented increase in the availability and collection of urban trajectory data, thus increasing the demand for more efficient ways to manage and analyze the data being…

Databases · Computer Science 2020-12-15 Sheng Wang , Zhifeng Bao , J. Shane Culpepper , Gao Cong

Predicting accurate future trajectories of pedestrians is essential for autonomous systems but remains a challenging task due to the need for adaptability in different environments and domains. A common approach involves collecting…

Computer Vision and Pattern Recognition · Computer Science 2025-11-05 Ryo Fujii , Hideo Saito , Ryo Hachiuma

CAPTCHAs or reverse Turing tests are real-time assessments used by programs (or computers) to tell humans and machines apart. This is achieved by assigning and assessing hard AI problems that could only be solved easily by human but not by…

Human-Computer Interaction · Computer Science 2014-02-05 A. K. B. Karunathilake , B. M. D. Balasuriya , R. G. Ragel

The ability to generate artificial human movement patterns while meeting location and time constraints is an important problem in the security community, particularly as it enables the study of the analog problem of detecting such patterns…

Logic in Computer Science · Computer Science 2025-02-14 Divyagna Bavikadi , Dyuman Aditya , Devendra Parkar , Paulo Shakarian , Graham Mueller , Chad Parvis , Gerardo I. Simari

Predicting future bus trip chains for an existing user is of great significance for operators of public transit systems. Existing methods always treat this task as a time-series prediction problem, but the 1-dimensional time series…

Machine Learning · Computer Science 2024-12-17 Xiannan Huang , Yixin Chen , Quan Yuan , Chao Yang

The IPv6 Routing Protocol for Low-Power and Lossy Networks (RPL) was recently introduced as the new routing standard for the Internet of Things. Although RPL defines basic security modes, it remains vulnerable to topological attacks which…

Networking and Internet Architecture · Computer Science 2016-08-08 Heiner Perrey , Martin Landsmann , Osman Ugus , Thomas C. Schmidt , Matthias Wählisch

With recent sensor and tracking technology advances, the volume of available trajectory data is steadily increasing. Consequently, managing and analyzing trajectory data has seen significant interest from the research community. The…

Databases · Computer Science 2024-09-10 Johann Bornholdt , Theodoros Chondrogiannis , Michael Grossniklaus

Nowadays, human movement in urban spaces can be traced digitally in many cases. It can be observed that movement patterns are not constant, but vary across time and space. In this work,we characterize such spatio-temporal patterns with an…

Social and Information Networks · Computer Science 2016-02-11 Lisette Espín-Noboa , Florian Lemmerich , Philipp Singer , Markus Strohmaier

User online behavior and interests will play a central role in future mobile networks. We introduce a systematic method for large-scale multi-dimensional analysis of online activity for thousands of mobile users across 79 buildings over a…

Networking and Internet Architecture · Computer Science 2010-08-31 Saeed Moghaddam , Ahmed Helmy

Building an accurate model of travel behaviour based on individuals' characteristics and built environment attributes is of importance for policy-making and transportation planning. Recent experiments with big data and Machine Learning (ML)…

Machine Learning · Computer Science 2022-12-01 Elnaz Yousefzadeh Barri , Steven Farber , Hadi Jahanshahi , Eda Beyazit

Nowadays as the world population has become more interconnected and is relying on faster transportation methods, simplified connections and shorter commuting times, we witness a rapid increase in human mobility. In this situation unveiling…

Social and Information Networks · Computer Science 2017-06-13 Karim Keramat Jahromi

The 'out of the blue' nature of recent terror attacks and the diversity of apparent motives, highlight the importance of understanding the online trajectories that individuals follow prior to developing high levels of extremist support.…

Physics and Society · Physics 2018-04-04 Z. Cao , M. Zheng , Y. Vorobyeva , C. Song , N. F. Johnson

Social relationships are a natural basis on which humans make trust decisions. Online Social Networks (OSNs) are increasingly often used to let users base trust decisions on the existence and the strength of social relationships. While most…

Cryptography and Security · Computer Science 2015-06-24 Marcin Nagy , Thanh Bui , Emiliano De Cristofaro , N. Asokan , Joerg Ott , Ahmad-Reza Sadeghi