Filters








470 Hits in 6.4 sec

On the observation of magnetic events on broad-band seismometers

J. Díaz, M. Ruiz, J. J. Curto, J. M. Torta, J. Ledo, A. Marcuello, P. Queralt
2020 Earth, Planets and Space  
stations' network using a simple low-pass filter.  ...  Although the preliminary impulse of those signals is usually stronger at stations located at high latitudes, major SSC are observed at seismic stations distributed worldwide.  ...  Data collected at magnetic observatories have been used as a supporting information in this contribution.  ... 
doi:10.1186/s40623-020-01236-9 fatcat:vwjjigyg6bgjljyg5fwd2ka4ne

Using an Internet of Behaviours to Study How Air Pollution Can Affect People's Activities of Daily Living: A Case Study of Beijing, China

Guangyuan Zhang, Stefan Poslad, Xiaoping Rui, Guangxia Yu, Yonglei Fan, Xianfeng Song, Runkui Li
2021 Sensors  
Peoples' density distribution computed by call detail records (CDRs) and air quality data are used to build a fixed effect model (FEM) to analyse the influence of air pollution on four types of ADLs.  ...  IoT sensor data can signal environmental events that can change human behaviour on mass.  ...  Using only a single POI (only eating out) to represent here may cause a bigger error.  ... 
doi:10.3390/s21165569 pmid:34451012 pmcid:PMC8402293 fatcat:v66u7huejvh7jccnxuejprcbj4

Thermal comfort evaluation in Tehran metro using Relative Warmth Index

M. Abbaspour, M. J. Jafari, N. Mansouri, F. Moattar, N. Nouri, M. Allahyari
2008 International Journal of Environmental Science and Technology  
In this research, thermal comfort at Tehran metro stations and carriages of lines 1 and 2 has been studied using this index.  ...  The measurements were taken during two periods of September 2006 and July 2007 at different zones of stations.  ...  S ) and vapor pressure (P V ) at t were estimated using equations 2 and 3 (Chadderton 1997) .  ... 
doi:10.1007/bf03326024 fatcat:kslitgfldjck7ilowehzrejlii

Testing the Generality of a Passenger Disregarded Train Dwell Time Estimation Model at Short Stops: Both Comparison and Theoretical Approaches

Dewei Li, Yonghao Yin, Hong He
2018 Journal of Advanced Transportation  
A more generalized predictor called "dwell time at the associated station" is used to replace the square root term in the original model.  ...  In a previous paper, the authors proposed a novel dwell time estimation model at short stops which did not require the passenger data.  ...  At first, the investigators were distributed among consecutive stations from Anheqiao to Xuanwumen station, on 25 September 2015, which is a workday, from 7:28 am to 11:11 am to include data from both  ... 
doi:10.1155/2018/8521576 fatcat:i6ahstrftvd4peb5linuczsda4

The Educated Sensorium and the Inclusion of Disabled People as Excludable

Tanya Titchkosky
2019 Scandinavian Journal of Disability Research  
These texts include a 2017-18 email exchange regarding accessibility between a subway station and a university building, as well as the first policy statement on 'The University and Accessibility for Disabled  ...  With this concept, I examine texts related to accessibility management at a large Canadian University.  ...  I am suggesting that statements about disability and texts about inclusion can be read for how they reflect a way a sensing.  ... 
doi:10.16993/sjdr.596 fatcat:5o4fqdg6rnh4feq6tb2oxese6q

Detecting weak public transport connections from cellphone and public transport data

Thomas Holleczek, Liang Yu, Joseph Kang Lee, Oliver Senn, Carlo Ratti, Patrick Jaillet
2014 Proceedings of the 2014 International Conference on Big Data Science and Computing - BigDataScience '14  
Along with classifying which transportation connections are weak, the analysis shows that the mode share of public transport use increases from 38 % in the morning to 44 % around mid-day and 52 % in the  ...  Our results, which were validated by Singapore's quadriennial Household Interview Travel Survey (HITS), revealed that there are 3.5 million public and 4.3 million private inter-district trips (HITS: 3.5  ...  A virtual location y k α is referred to as a cluster if and only if there are at least two call detail records associated with y k α and the time α spends at y k α exceeds the threshold value ∆t, which  ... 
doi:10.1145/2640087.2644196 fatcat:j2e5r3w5kbavphkuulawhb7zhm

Detecting weak public transport connections from cellphone and public transport data

Thomas Holleczek, Liang Yu, Joseph Kang Lee, Oliver Senn, Carlo Ratti, Patrick Jaillet
2014 Proceedings of the 2014 International Conference on Big Data Science and Computing - BigDataScience '14  
Along with classifying which transportation connections are weak, the analysis shows that the mode share of public transport use increases from 38 % in the morning to 44 % around mid-day and 52 % in the  ...  Our results, which were validated by Singapore's quadriennial Household Interview Travel Survey (HITS), revealed that there are 3.5 million public and 4.3 million private inter-district trips (HITS: 3.5  ...  A virtual location y k α is referred to as a cluster if and only if there are at least two call detail records associated with y k α and the time α spends at y k α exceeds the threshold value ∆t, which  ... 
doi:10.1145/2640087.2644164 fatcat:ocmvehtbxneiriqm7elchqxhru

Digital breadcrumbs: Detecting urban mobility patterns and transport mode choices from cellphone networks [article]

Thomas Holleczek, Liang Yu, Joseph K. Lee, Oliver Senn, Kristian Kloeckl, Carlo Ratti, Patrick Jaillet
2013 arXiv   pre-print
Along with classifying which transportation connections are weak or underserved, the analysis shows that the mode share of public transport use increases from 38 percent in the morning to 44 percent around  ...  Our results, which were validated by Singapore's quadriennial Household Interview Travel Survey (HITS), revealed that there are 3.5 (HITS: 3.5 million) million and 4.3 (HITS: 4.4 million) million inter-district  ...  Thanks to the National Science Foundation, the AT&T Foundation, the MIT 12 SMART program, the MIT CCES program, Audi Volkswagen, BBVA, The Coca Cola Company, Ericsson, Expo 2015, Ferrovial, GE and all  ... 
arXiv:1308.6705v1 fatcat:ljm3cbtn2jbjjfvrinmabh3n2u

Safety risk management of underground engineering in China: Progress, challenges and strategies

Qihu Qian, Peng Lin
2016 Journal of Rock Mechanics and Geotechnical Engineering  
Based on the analysis of the typical accidents in China in the last decade, the new challenges in the safety risk management for underground engineering are identified as follows: (1) control of unsafe  ...  Shigang She, Songqing Lin, Xiaoli Rong for their critical recommendations, which have greatly helped the authors to improve the paper.  ...  The cloud server consists of (i) a data acquisition module, which sends the hazard report by WeChat, (ii) a data identifying module, which analyzes the reported data, identifies the data type and source  ... 
doi:10.1016/j.jrmge.2016.04.001 fatcat:ju2men6hvfbitfp6dr5hc2yvqm

Personalized travel mode detection with smartphone sensors

Xing Su, Yuan Yao, Qing He, Jie Lu, Hanghang Tong
2017 2017 IEEE International Conference on Big Data (Big Data)  
It takes smartphone sensor data as the input, and aims to identify six travel modes: walking, jogging, bicycling, driving a car, riding a bus, taking a subway.  ...  I am grateful for his patience, motivation and encouragement throughtout the PhD study.  ...  We use the barometer data to get the information of ambient pressure, which is an important feature in identifying the different transportation modes.  ... 
doi:10.1109/bigdata.2017.8258065 dblp:conf/bigdataconf/SuYHLT17 fatcat:lfiv7ufbgba7vgq36tetije43q

Urban Computing

Yu Zheng, Licia Capra, Ouri Wolfson, Hai Yang
2014 ACM Transactions on Intelligent Systems and Technology  
and receive data of different formats and at different frequencies.  ...  This calls for an integration of instant data-mining techniques into a visualization framework, which is still missing in urban computing. 3.  ...  People usually need to swipe their card when entering a subway station or getting on a bus. Sometimes they also need to swipe at an exit or when getting off a bus.  ... 
doi:10.1145/2629592 fatcat:no5gcshbmrdfphv6ewm6wdoewq

A DYNAMIC SUPERVISION APPROACH BASED ON STOCHASTIC P-TIMED PETRI NETS: APPLICATION TO A RAILWAY TRANSPORT NETWORK

Anis M'halla
2022 Proceedings on Engineering Sciences  
Stochastic P-time Petri Nets (SP-TPN) are used for modelling.  ...  With the aim of improving the railway transport quality, we propose a new monitoring structure able to react to different situations without prior knowledge of the system's failure modes.  ...  This clock is reset at each arrival in the metro station and restarted at each subway departure, fig. 12 .  ... 
doi:10.24874/pes04.03.011 fatcat:w6aatatxhrcchg2rjokyozi7bi

Assessing the usage and level-of-service of pedestrian facilities in train stations: A Swiss case study

Flurin S. Hänseler, Michel Bierlaire, Riccardo Scarinci
2016 Transportation Research Part A: Policy and Practice  
The framework is discussed at the example of Lausanne railway station.  ...  Moreover, to underline its practical applicability, a six-step planning guideline is presented that can be used to design and optimize rail access facilities for new or existing train stations.  ...  The research presented in this report has been conducted in the framework of 'PedFlux', a three-year research collaboration between EPFL's Transportation Center and SBB's rail access division (I-AT-BZU  ... 
doi:10.1016/j.tra.2016.05.010 fatcat:ulbihfxdvfeynfanb76fb4okim

NeBula: Quest for Robotic Autonomy in Challenging Environments; TEAM CoSTAR at the DARPA Subterranean Challenge [article]

Ali Agha, Kyohei Otsu, Benjamin Morrell, David D. Fan, Rohan Thakker, Angel Santamaria-Navarro, Sung-Kyun Kim, Amanda Bouman, Xianmei Lei, Jeffrey Edlund, Muhammad Fadhil Ginting, Kamak Ebadi (+60 others)
2021 arXiv   pre-print
We discuss various components of the NeBula framework, including: (i) geometric and semantic environment mapping; (ii) a multi-modal positioning system; (iii) traversability analysis and local planning  ...  NeBula is an uncertainty-aware framework that aims at enabling resilient and modular autonomy solutions by performing reasoning and decision making in the belief space (space of probability distributions  ...  Acknowledgments The work is partially supported by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004  ... 
arXiv:2103.11470v4 fatcat:rq2wgczzl5clphzgujjdbd3ywm

Passenger rail station safety improvement and analysis of end-of-track collisions based on systems-theoretic accident modeling and processes (STAMP)

Zhipeng Zhang, Xiang Liu, Hao Hu
2021 Smart and Resilient Transport  
Over the past decade, a series of end-of-track collisions occurred at passenger stations with substantial property damage and casualties.  ...  Purpose At the US passenger stations, train operations approaching terminating tracks rely on the engineer's compliant behavior to safely stop before the end of the tracks.  ...  Figure 1 . 1 Basic process model in train operation at US passenger stations SRT Figure 2 . 2 Basic study only considers some of them that have a close relationship with train operations at passenger  ... 
doi:10.1108/srt-12-2020-0028 fatcat:p46yx2spcjf4zk4h3aqt3hqhiu
« Previous Showing results 1 — 15 out of 470 results