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Real-time tweets can provide useful information on evolving events and situations. Geotagged tweets are especially useful, as they indicate the location of origin and provide geographic context. However, only a small portion of tweets are…

Social and Information Networks · Computer Science 2019-10-08 Luke S. Snyder , Morteza Karimzadeh , Ray Chen , David S. Ebert

This study analyzes mobile phone data derived from 10 million daily active users across the United States to better understand the spatio-temporal activity patterns of users in Central Park, New York. The aim of this initial investigation…

Computers and Society · Computer Science 2018-01-09 Wenfei Xu

Today's mobile robots are expected to operate in complex environments they share with humans. To allow intuitive human-robot collaboration, robots require a human-like understanding of their surroundings in terms of semantically classified…

Computer Vision and Pattern Recognition · Computer Science 2020-01-14 Markus Hiller , Chen Qiu , Florian Particke , Christian Hofmann , Jörn Thielecke

Smartphones and other mobile devices are today pervasive across the globe. As an interesting side effect of the surge in mobile communications, mobile network operators can now easily collect a wealth of high-resolution data on the habits…

Networking and Internet Architecture · Computer Science 2016-10-25 Ghazaleh Khodabandelou , Vincent Gauthier , Mounim A. El-Yacoubi , Marco Fiore

Context modeling and recognition represent complex tasks that allow mobile and ubiquitous computing applications to adapt to the user's situation. Current solutions mainly focus on limited context information generally processed on…

Machine Learning · Computer Science 2023-07-19 Mattia Giovanni Campana , Franca Delmastro

Maps are crucial in conveying geospatial data in diverse contexts such as news and scientific reports. This research, utilizing thematic maps, probes deeper into the underexplored intersection of text framing and map types in influencing…

Human-Computer Interaction · Computer Science 2024-03-14 Arlen Fan , Fan Lei , Michelle Mancenido , Alan MacEachren , Ross Maciejewski

Precisely estimating a robot's pose in a prior, global map is a fundamental capability for mobile robotics, e.g. autonomous driving or exploration in disaster zones. This task, however, remains challenging in unstructured, dynamic…

Potentially influential spaces in the spatial networks of cities can be detected by means of the entropy participation ratios. Local (connectivity) and global (centrality) entropies are considered. While the connectivity entropy has a…

Physics and Society · Physics 2007-09-28 D. Volchenkov , Ph. Blanchard

What people choose to see, like, or remember is of profound interest to city planners and architects. Previous research suggests what people are more likely to store in their memory - buildings with dominant shapes and bright colors,…

Physics and Society · Physics 2021-12-01 Shan He , Yuji Yoshimura , Jonas Helfer , Gary Hack , Carlo Ratti , Takehiko Nagakura

Planet-scale photo geolocalization is the complex task of estimating the location depicted in an image solely based on its visual content. Due to the success of convolutional neural networks (CNNs), current approaches achieve super-human…

Computer Vision and Pattern Recognition · Computer Science 2021-10-22 Jonas Theiner , Eric Mueller-Budack , Ralph Ewerth

Geo-tagged tweets can potentially help with sensing the interaction of people with their surrounding environment. Based on this hypothesis, this paper makes use of geotagged tweets in order to ascertain various land uses with a broader goal…

Numerical Analysis · Mathematics 2021-01-12 Saeed Khan , Md Shahzamal

Understanding the spatial networks formed by the trajectories of mobile users can be beneficial to applications ranging from epidemiology to local search. Despite the potential for impact in a number of fields, several aspects of human…

Social and Information Networks · Computer Science 2015-03-18 Anastasios Noulas , Blake Shaw , Renaud Lambiotte , Cecilia Mascolo

The information collected by mobile phone operators can be considered as the most detailed information on human mobility across a large part of the population. The study of the dynamics of human mobility using the collected geolocations of…

Social and Information Networks · Computer Science 2013-11-21 Nicolas Ponieman , Alejo Salles , Carlos Sarraute

Semantic segmentation aims to robustly predict coherent class labels for entire regions of an image. It is a scene understanding task that powers real-world applications (e.g., autonomous navigation). One important application, the use of…

Computer Vision and Pattern Recognition · Computer Science 2023-02-16 Yuxiang Zhang , Sachin Mehta , Anat Caspi

The proliferation of smartphones and wearable devices has increased the availability of large amounts of geospatial streams to provide significant automated discovery of knowledge in pervasive environments, but most prominent information…

Social and Information Networks · Computer Science 2019-02-15 Bhaskar Gautam , Annappa Basava , Abhishek Singh , Amit Agrawal

In many Twitter studies, it is important to know where a tweet came from in order to use the tweet content to study regional user behavior. However, researchers using Twitter to understand user behavior often lack sufficient geo-tagged…

Social and Information Networks · Computer Science 2017-11-21 Binxuan Huang , Kathleen M. Carley

Natural language place descriptions in everyday communication provide a rich source of spatial knowledge about places. An important step to utilize such knowledge in information systems is geo-referencing all the places referred to in these…

Artificial Intelligence · Computer Science 2017-10-11 Hao Chen , Maria Vasardani , Stephan Winter

While benefiting people's daily life in so many ways, smartphones and their location-based services are generating massive mobile device location data that has great potential to help us understand travel demand patterns and make…

Machine Learning · Computer Science 2020-12-10 Chenfeng Xiong , Aref Darzi , Yixuan Pan , Sepehr Ghader , Lei Zhang

There is an increasing trend of people leaving digital traces through social media. This reality opens new horizons for urban studies. With this kind of data, researchers and urban planners can detect many aspects of how people live in…

Social and Information Networks · Computer Science 2015-06-02 Silvia Paldino , Iva Bojic , Stanislav Sobolevsky , Carlo Ratti , Marta C. Gonzalez

Tracking locations is practical and speditive with smartphones, as they are omnipresent devices, relatively cheap, and have the necessary sensors for positioning and networking integrated in the same box. Nowadays recent models have GNSS…

Computers and Society · Computer Science 2022-01-20 Francesco Pirotti , Alberto Guarnieri , Marco Piragnolo , Marco Boscaro , Raffaele Cavalli