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Trip Centrality: walking on a temporal multiplex with non-instantaneous link travel time [article]

Silvia Zaoli, Piero Mazzarisi, Fabrizio Lillo
2019 arXiv   pre-print
Temporal generalisations of centrality metrics based on walk-counting, like Katz centrality, exist, however they do not account for non-zero link travel times and for the multiplex structure.  ...  In many real world networks, especially in transportation systems, links are dynamic, i.e. their presence depends on time, and travelling between two nodes requires a non-vanishing time.  ...  Here, we propose a new centrality metric generalising Katz centrality to the case of a temporal multiplex with non-zero link travel time.  ... 
arXiv:1903.02815v1 fatcat:hxhs34odonewfa6rkr5kv4yj3u

Trip Centrality: walking on a temporal multiplex with non-instantaneous link travel time

Silvia Zaoli, Piero Mazzarisi, Fabrizio Lillo
2019 Scientific Reports  
Temporal generalisations of centrality metrics based on walk-counting, like Katz centrality, exist, however they do not account for non-zero link travel times and for the multiplex structure.  ...  In many real world networks, especially in transportation systems, links are dynamic, i.e. their presence depends on time, and travelling between two nodes requires a non-vanishing time.  ...  Transportation networks are the most direct application for Trip Centrality, which is however more general, being suited for any temporal network with non-zero link travel time.  ... 
doi:10.1038/s41598-019-47115-6 pmid:31332234 pmcid:PMC6646307 fatcat:6fkolauhybff5db2yhtdimkkru

Multimodal urban mobility and multilayer transport networks [article]

Luis Guillermo Natera Orozco, Laura Alessandretti, Meead Saberi, Michael Szell, Federico Battiston
2021 arXiv   pre-print
Finally, we conclude with an outlook on open research questions and promising directions for future research.  ...  We then provide a survey of freely available datasets on multimodal infrastructure and mobility, and a list of open source tools for their analyses.  ...  On one hand this is happening naturally just by the existence of multiple modes -for example, a trip with a bus includes walking to and from a bus station.  ... 
arXiv:2111.02152v1 fatcat:lyaadwd4afb4bcy4x3mcekh5aq

Identifying the Intertwined Links Between Mobility and Routing in Opportunistic Networks [chapter]

Xiaoyan Hong, Bo Gu
2013 Routing in Opportunistic Networks  
Mobility intertwines with routing protocols play a vital role in opportunistic networks.  ...  This chapter will trace the research on mobility and mobility enabled message dissemination approaches, and will present a survey over mobility models, analytical results on motion characteristics, and  ...  Multiple cyclic movement patterns are multiplexed to form a contact graph with time-dependent metric states at each link.  ... 
doi:10.1007/978-1-4614-3514-3_1 fatcat:vv43nasvzzhmzaxm57dtmgtyfm

Human mobility: Models and applications

Hugo Barbosa, Marc Barthelemy, Gourab Ghoshal, Charlotte R. James, Maxime Lenormand, Thomas Louail, Ronaldo Menezes, José J. Ramasco, Filippo Simini, Marcello Tomasini
2018 Physics reports  
In this survey, we review the approaches developed to reproduce various mobility patterns, with the main focus on recent developments.  ...  Throughout the text the description of the theory is intertwined with real-world applications.  ...  As showed in Fig. 18 , the average structure of travel time varies with trip length and between cities.  ... 
doi:10.1016/j.physrep.2018.01.001 fatcat:4ewobqkarzho3dqjhd47iu3smu

The structure and dynamics of multilayer networks

S. Boccaletti, G. Bianconi, R. Criado, C.I. del Genio, J. Gómez-Gardeñes, M. Romance, I. Sendiña-Nadal, Z. Wang, M. Zanin
2014 Physics reports  
We offer here a comprehensive review on both structural and dynamical organization of graphs made of diverse relationships (layers) between its constituents, and cover several relevant issues, from a full  ...  However, up until recently, attention was almost exclusively given to networks in which all components were treated on equivalent footing, while neglecting all the extra information about the temporal-  ...  the ArXiv public repository, and we warn the reader that it is very likely that those Manuscripts could have appeared meanwhile on peer-reviewed Journals.  ... 
doi:10.1016/j.physrep.2014.07.001 pmid:32834429 pmcid:PMC7332224 fatcat:5y6wdkop2nd75kwnla4by2icqy

Design and validation of a real-time visual feedback system to improve minimum toe clearance (mTC) in transfemoral amputees

Ashutosh Tiwari, Deepak Joshi
2021 IEEE transactions on neural systems and rehabilitation engineering  
In this paper, we first develop a real-time visual feedback system with center of pressure (CoP) information.  ...  Next, we recruited six non-disabled and three transfemoral amputees to investigate the effect on mTC while participants were trained to shift the CoP anteriorly/posteriorly during heel strike.  ...  The DAQ consists of an Arduino micro, a 16 × 1 multiplexer (CD4067BE), a 5V voltage regulator, a voltage divider circuit, an Adafruit Bluetooth module (Bluefruit EZ-Link), and a Li-Po 800mAh rechargeable  ... 
doi:10.1109/tnsre.2021.3105139 pmid:34398756 fatcat:hzobnpny5jbe7jxkabdg6tesou

Frequency Comb-Based WDM Transmission Systems Enabling Joint Signal Processing

Lars Lundberg, Magnus Karlsson, Abel Lorences-Riesgo, Mikael Mazur, Victor Torres-Company, Jochen Schröder, Peter Andrekson
2018 Applied Sciences  
This enables a lower DSP complexity or a higher phase-noise tolerance.  ...  We review the use of optical frequency combs in wavelength-division multiplexed (WDM) fiber optic communication systems.  ...  If we assume a link with electronic dispersion compensation, the dispersive walk-off between the carriers together with the phase-noise scaling in parametric optical frequency combs [97] can be used  ... 
doi:10.3390/app8050718 fatcat:ihkutfhwnrf2xhxr55i2ajphem

Towards practical quantum cryptography

S. Chiangga, P. Zarda, T. Jennewein, H. Weinfurter
1999 Applied physics B  
Thus different wavelengths of light travel at varying speeds within the fibre and arrive at the detector with a temporal variance greater than that of the original pulse.  ...  Wavelength dependent multiplexers (WM) and demultiplexers (WD) Multiplexers split a multi-wavelength signal traveling on a single fiber into many single wavelength signals over individual fibres.  ...  APPENDICES Appendix A -List of Abbreviations  ... 
doi:10.1007/s003400050824 fatcat:64ba6xt675g2rk6t4yzjc7ecfa

Concurrent Firing Light Detection and Ranging System for Autonomous Vehicles

Gunzung Kim, Imran Ashraf, Jeongsook Eom, Yongwan Park
2021 Remote Sensing  
Extensive simulations indicated that the proposed LIDAR could provide autonomous vehicles or autonomous walking robots with good distance images to recognize the environment ahead.  ...  The proposed LIDAR was a 3D scanning LIDAR method that consisted of 128 output channels in one vertical line in the measurement direction and concurrently measured the distance for each of these 128 channels  ...  Distance is obtained using the round trip travel time from the laser to the target.  ... 
doi:10.3390/rs13091767 fatcat:6kkosu3gwzebhbqx6jjghvi45i

A Uniform Energy Consumption Algorithm for Wireless Sensor and Actuator Networks Based on Dynamic Polling Point Selection

Shuo Li, Jun Peng, Weirong Liu, Zhengfa Zhu, Kuo-Chi Lin
2013 Sensors  
In this paper, a multi-hop routing mobile data collection algorithm is proposed based on dynamic polling point selection with delay constraints to address this issue.  ...  Because real-time network applications require meeting data collection delay constraints, planning the path of the actuator is a very important issue to balance the prolongation of the network lifetime  ...  multiplex mechanism, such as frequency-division multiplexing (FDM), time-division multiplexing (TDM) or code-division multiplexing (CDM).  ... 
doi:10.3390/s140100095 pmid:24451455 pmcid:PMC3926548 fatcat:bnitf36b6ndgzbznqkqsa5t7vq

Modern Time: Photography and Temporality

Kris Belden-Adams
2009 International Journal of Technology, Knowledge and Society  
Moreover, he linked photography's peculiar temporality to its capacity for a certain kind of realism: -false on the level of perception, true on the level of time.‖ 2 Barthes's analysis poses a challenge  ...  Rather than provide a comprehensive, and necessarily incomplete, study of every possible way in which photography can relate to time, this study instead focuses on a number of in-depth  ...  A viewer's placement of a family portrait within a non-linear, non-sequential temporal continuum by adding a fictional narrative convolutes distinctions between time and temporality, implying that time's  ... 
doi:10.18848/1832-3669/cgp/v05i03/55994 fatcat:xduqv4o7ovbp5i6hjk2telbsly

Controlling Optical Chaos, Spatio-Temporal Dynamics, and Patterns [chapter]

Lucas Illing, Daniel J. Gauthier, Rajarshi Roy
2007 Advances In Atomic, Molecular, and Optical Physics  
We describe how small perturbations applied to optical systems can be used to suppress or control optical chaos, spatio-temporal dynamics, and patterns.  ...  We demonstrate that this orderly structure can be exploited for a variety of applications, such as stabilizing laser behavior in a regime where the device would normally produce erratic behavior, communicating  ...  For fiber lengths of tens of meters, the round-trip time taken by the light to travel once along the laser cavity is of the order of hundreds of nanoseconds.  ... 
doi:10.1016/s1049-250x(06)54010-8 fatcat:3l7xns6n2fcijfw7r3s6xz26wi

Roadmap on all-optical processing

Paolo Minzioni, Cosimo Lacava, Takasumi Tanabe, Jianji Dong, Xiaoyong Hu, Gyorgy Csaba, Wolfgang Porod, Ghanshyam Singh, Alan E Willner, Ahmed Almaiman, Victor Torres-Company, Jochen Schröder (+20 others)
2019 Journal of Optics  
This work was supported in part from a grant from the John Templeton Foundation (JTF #60478).  ...  Acknowledgments Center for Integrated Access Network Acknowledgments We thank Jeff Shapiro, Jim Franson and Peter Knight for valuable discussions on this weak nonlinearity approach.  ...  Finally, in temporal multiplexing, a single source is operated many times, and a quantum memory (a device for storing or buffering an optical pulse) must be incorporated in order to delay successful outputs  ... 
doi:10.1088/2040-8986/ab0e66 fatcat:6zg52wqctvgldeddmehkezzjnq

Nonlinear Effects in Optical Fibers [chapter]

2016 Fiber Lasers  
This is A.2 Components .  ...  Despite the intrinsically small values of the nonlinear coefficient for silica, the nonlinear effects in optical fibers can be observed even at low powers considering that the light is confined in a relative  ...  Further, we would like to thank the Laboratoire de Metrologie des Fibres Optique, EPFL Lausanne, for the loan of the PM fibre, and C R Menyuk for stimulating discussion on the subject.  ... 
doi:10.1201/9781315370521-4 fatcat:qtg3gsgqardy5o2zi2ecycwioy
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