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Background: Access to radiotherapy (RT) is constrained by two compounding factors: insufficient machine capacity to meet patient demand and geographic distance from treatment facilities. Existing analyses address these factors separately,…

Medical Physics · Physics 2026-05-25 Laurence Wroe , Archie Brown , Sophia Martin , Alika Ho , Steinar Stapnes

Social media offers a unique window into attitudes like racism and homophobia, exposure to which are important, hard to measure and understudied social determinants of health. However, individual geo-located observations from social media…

Social and Information Networks · Computer Science 2018-09-06 Kunal Relia , Mohammad Akbari , Dustin Duncan , Rumi Chunara

There is a wealth of data on air pollution within several users' reach, including modelled concentrations and depositions as well as observations from air quality stations. However, data integration to perceive spatial and temporal trends…

We present controllers that enable mobile robots to persistently monitor or sweep a changing environment. The changing environment is modeled as a field which grows in locations that are not within range of a robot, and decreases in…

Robotics · Computer Science 2016-11-18 Stephen L. Smith , Mac Schwager , Daniela Rus

The environments of such large industrial machines as waste cranes in waste incineration plants are often weakly observable, where little information about the environmental state is contained in the observations due to technical difficulty…

Robotics · Computer Science 2022-05-10 Hikaru Sasaki , Terushi Hirabayashi , Kaoru Kawabata , Takamitsu Matsubara

Autonomous navigation of a mobile robot is a challenging task which requires ability of mapping, localization, path planning and path following. Conventional mapping methods build a dense metric map like an occupancy grid, which is affected…

Robotics · Computer Science 2024-10-16 Kirill Muravyev , Konstantin Yakovlev

Most existing literature focuses on the exterior temporal rhythm of human movement to infer the functional regions in a city, but they neglects the underlying interdependence between the functional regions and human activities which…

Social and Information Networks · Computer Science 2015-01-22 Ye Zhi , Yu Liu , Shaowen Wang , Min Deng , Jing Gao , Haifeng Li

Self-driving vehicles are a maturing technology with the potential to reshape mobility by enhancing the safety, accessibility, efficiency, and convenience of automotive transportation. Safety-critical tasks that must be executed by a…

Robotics · Computer Science 2016-04-27 Brian Paden , Michal Cap , Sze Zheng Yong , Dmitry Yershov , Emilio Frazzoli

Mission planning can often be formulated as a constrained control problem under multiple path constraints (i.e., safety constraints) and budget constraints (i.e., resource expenditure constraints). In a priori unknown environments,…

Robotics · Computer Science 2025-10-10 Daniel M. Cherenson , Devansh R. Agrawal , Dimitra Panagou

In this letter, we address the problem of exploration and metric-semantic mapping of multi-floor GPS-denied indoor environments using Size Weight and Power (SWaP) constrained aerial robots. Most previous work in exploration assumes that…

Robotics · Computer Science 2025-07-22 Yuezhan Tao , Xu Liu , Igor Spasojevic , Saurav Agarwal , Vijay Kumar

At the heart of path-planning methods for autonomous robotic exploration is a heuristic which encourages exploring unknown regions of the environment. Such heuristics are typically computed using frontier-based or information-theoretic…

Robotics · Computer Science 2020-11-11 Di Deng , Runlin Duan , Jiahong Liu , Kuangjie Sheng , Kenji Shimada

Spatial approximations have been traditionally used in spatial databases to accelerate the processing of complex geometric operations. However, approximations are typically only used in a first filtering step to determine a set of candidate…

The purpose of this paper is to explore a new way of autonomous mapping. Current systems using perception techniques like LAZER or SONAR use probabilistic methods and have a drawback of allowing considerable uncertainty in the mapping…

Robotics · Computer Science 2013-12-16 Amiraj Dhawan , Parag Oak , Rahul Mishra , George Puthanpurackal

The ability to autonomously navigate in unknown environments is important for mobile robots. The map is the core component to achieve this. Most map representations rely on drift-free state estimation and provide a global metric map to…

Robotics · Computer Science 2021-09-21 Xuecheng Xu , Cheng Wang , Yue Wang , Rong Xiong

We propose DeepExplorer, a simple and lightweight metric-free exploration method for topological mapping of unknown environments. It performs task and motion planning (TAMP) entirely in image feature space. The task planner is a recurrent…

Robotics · Computer Science 2023-03-17 Yuhang He , Irving Fang , Yiming Li , Rushi Bhavesh Shah , Chen Feng

Equitable urban transportation applications require high-fidelity digital representations of the built environment: not just streets and sidewalks, but bike lanes, marked and unmarked crossings, curb ramps and cuts, obstructions, traffic…

Computer Vision and Pattern Recognition · Computer Science 2024-08-05 Bin Han , Yiwei Yang , Anat Caspi , Bill Howe

Human-robot handovers are characterized by high uncertainty and poor structure of the problem that make them difficult tasks. While machine learning methods have shown promising results, their application to problems with large state…

Robotics · Computer Science 2016-10-18 Francesco Riccio , Roberto Capobianco , Daniele Nardi

Augmented Reality (AR) is becoming mobile. Mobile devices have many constraints but also rich new features that traditional desktop computers do not have. There are several survey papers on AR, but none is dedicated to Mobile Augmented…

Graphics · Computer Science 2013-09-19 Zhanpeng Huang , Pan Hui , Christoph Peylo , Dimitris Chatzopoulos

The presence of Super-Apps have changed the way we think about the interactions between users and commerce. It then comes as no surprise that it is also redefining the way banking is done. The paper investigates how different interactions…

Machine Learning · Computer Science 2021-02-22 Luisa Roa , Andrés Rodríguez-Rey , Alejandro Correa-Bahnsen , Carlos Valencia

The characteristics and determinants of health and disease are often organised in space, reflecting our spatially extended nature. Understanding the influence of such factors requires models capable of capturing spatial relations. Though a…