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Space-time-coding digital metasurfaces

Lei Zhang, Xiao Qing Chen, Shuo Liu, Qian Zhang, Jie Zhao, Jun Yan Dai, Guo Dong Bai, Xiang Wan, Qiang Cheng, Giuseppe Castaldi, Vincenzo Galdi, Tie Jun Cui
2018 Nature Communications  
The recently proposed digital coding metasurfaces make it possible to control electromagnetic (EM) waves in real time, and allow the implementation of many different functionalities in a programmable way  ...  Here, we propose a general theory of space-time modulated digital coding metasurfaces to obtain simultaneous manipulations of EM waves in both space and frequency domains, i.e., to control the propagation  ...  The space-time-coding strategy provides a new way of designing multi-bit programmable metasurface (even with arbitrary phases), which does not require a complicated layout and control system, and enables  ... 
doi:10.1038/s41467-018-06802-0 pmid:30337522 pmcid:PMC6194064 fatcat:u75a2pv3kfdjpep6y46qpk6vyu

Space Technologies for Sustainable Heritage: 10th anniversary of HIST

Fulong Chen, Xinyuan Wang, Jie Liu, Shaobo Liu
2021 Heritage Science  
Looking forward, future researches on the application of space technologies to heritage conservation will be conducted in six major fields: (a) heritage-related multi-source data access, big data processing  ...  etc., provide a new paradigm of scientific and technological innovation, with the potential to transform the way of social production and people's life.  ...  JL encapsulated HIST's major achievements in the past decade. XW introduced major future research fields and proposed what HIST will achieve together with global stakeholders in the next decade.  ... 
doi:10.1186/s40494-021-00630-0 pmid:34900263 pmcid:PMC8648861 fatcat:tesf2rlpubfbhk6sy6s3i2riw4

A Recursive Recomputation Approach for Smoothing in Nonlinear State–Space Modeling: An Attempt for Reducing Space Complexity

Kazuyuki Nakamura, Takashi Tsuchiya
2007 IEEE Transactions on Signal Processing  
In this paper, we develop a new generic implementation scheme for numerical smoothing in nonlinear and Bayesian state-space modeling.  ...  Our new generic implementation scheme, which we call recursive recomputation scheme, reduces the space complexity from ( ) to ( log ), at the cost of (log ) times computation of filtering distributions  ...  Roweis, University of Toronto, Toronto, ON, Canada, for information about research in recursive recomputation in the context of hidden Markov models.  ... 
doi:10.1109/tsp.2007.899585 fatcat:lu4xqioe5vdt5dh4je5dhjfstu

Emergent Poetry of Northern Nigeria within Digital Space

Anastasia V. Lyakhovich, St. Petersburg State University
2021 Vestnik of Saint Petersburg University Asian and African Studies  
fragmentary and momentary way.  ...  Poetic texts are created in a digital medium, a means that presents itself as an inexhaustible source for the rapid circulation and unlimited distribution of texts.  ...  Mostly, its poetic expressiveness has remained so far insensitive to the evolutionary processes in the field of digital poetry, i.e., it neither introduces new ways of sensation or perception, nor enjoys  ... 
doi:10.21638/spbu13.2021.402 fatcat:s4wccvxkfjcwnfirp7bi527oqm

Reproducible Software Environment: A tool enabling computational reproducibility in geospace sciences and facilitating collaboration

Asti Bhatt, Todd Valentic, Ashton Reimer, Leslie Lamarche, Pablo Reyes, Russell Cosgrove
2020 Journal of Space Weather and Space Climate  
In this technical paper, we discuss some challenges for performing reproducible science and a potential solution via Resen, which is demonstrated using a case study of a geospace event.  ...  The main goals of InGeo are to remove barriers in accessing, processing, and visualizing geospatially resolved data from multiple sources using methodologies and tools that are reproducible.  ...  The software and data used for the case study (Fig. 4) have been published on Zenodo, DOI: https://doi.org/10.5281/zenodo.3564835.  ... 
doi:10.1051/swsc/2020011 fatcat:hubdmt5q6vhxfcom5cb37jcuxi

Front Matter: Volume 8044

Proceedings of SPIE, Khanh D. Pham, Henry Zmuda, Joseph Lee Cox, Greg J. Meyer
2011 Sensors and Systems for Space Applications IV  
Numbers in the index correspond to the last two digits of the six-digit CID number.  ...  Publication of record for individual papers is online in the SPIE Digital Library.  ...  Numbers in the index correspond to the last two digits of the six-digit CID number.  ... 
doi:10.1117/12.900639 fatcat:r4adgj22sjds3ms2aybsgdiyn4

Space Junk [chapter]

Alice Gorman
2020 Earth 2020  
In the once-laggard United States, for example, the 2020s saw some major steps forward.  ...  During this time, major changes in digital technology were rapidly opening up new ways of generating work. I could now mount and electronically control my camera from a forty-foot pneumatic monopod.  ...  The research was ground-breaking in multiple ways.  ... 
doi:10.11647/obp.0193.27 fatcat:zadldbhlm5b2xhfx7tpaq7bx74

A Computational Mathematics View of Space, Time and Complexity [chapter]

David H. Bailey, Jonathan M. Borwein
2016 Space, Time and the Limits of Human Understanding  
by its very nature is discrete, not continuous, and tied to the real world in ways that the more theoretical branches of mathematics (and computer science) often are not.  ...  least resistance, that the stream so far from its source [in empirical reality] will separate into a multitude of insignificant branches, and that the discipline will become a disorganized mass of details  ...  As of the present date, the state-of-the-art in this regard is the computation of over 10 trillion base-16 digits and 12.1 trillion decimal digits of π, by Alexander Yee and Shigeru Kondo [24] .  ... 
doi:10.1007/978-3-319-44418-5_32 fatcat:532nsuosqbaqdieyz25n5ktdxi

Finding Spaces: Teacher Education Technology Competencies (TETCs)

Andrea C. Burrows, Gabriel P. Swarts, Linda Hutchison, Jason M. Katzmann, Rod Thompson, Lindsey Freeman, Angela Schanke, Trina Kilty, Todd Reynolds
2021 Education Sciences  
The purpose of this study was to explore existing practices of incorporating technology into secondary methods coursework and to search for new spaces to implement the TETC guidelines and structure, as  ...  Vignettes authored by faculty in each content area provide a rich depth of faculty experience and dispositions regarding technology integration, as well as spaces for the deeper use of technology based  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/educsci11110733 fatcat:4us6vdnhsffelbajquqdcxacdq

Temporal BYY Encoding, Markovian State Spaces, and Space Dimension Determination

L. Xu
2004 IEEE Transactions on Neural Networks  
(BYY) learning with both new insights and new results on not only the discrete state featured Hidden Markov model and extensions but also the continuous state featured linear state spaces and extensions  ...  , especially with a new learning mechanism that makes selection of the state number or the dimension of state space either automatically during adaptive learning or subsequently after learning via model  ...  ACKNOWLEDGMENT The author would like to thank Z. Y. Liu and K. C. Chiu for experiments.  ... 
doi:10.1109/tnn.2004.833302 pmid:18238092 fatcat:g2hol2l5rfgrpj3l2ggejjc4vm

Development of a space cold atom clock

Wei Ren, Tang Li, Qiuzhi Qu, Bin Wang, Lin Li, Desheng Lü, Weibiao Chen, Liang Liu
2020 National Science Review  
Operating such cold-atom clocks in space paves the way for further exploring in fundamental physics, for example dark matter and general relativity.  ...  Atomic clocks with cold atoms play important roles in the field of fundamental physics as well as primary frequency standards.  ...  Acknowledgements We would like to thank our colleagues of CACES mission for their discussions. We also thank Dr. Yuan Sun for many discussions and efforts in revising the manuscript.  ... 
doi:10.1093/nsr/nwaa215 pmid:34691520 pmcid:PMC8288775 fatcat:hn2pejfctrd5pko5ulq6wwbmaa

Prelims [chapter]

2022 Re-Imagining Spaces and Places  
Any opinions expressed in the chapters are those of the authors.  ...  Whilst Emerald makes every effort to ensure the quality and accuracy of its content, Emerald makes no representation implied or otherwise, as to the chapters' suitability and application and disclaims  ...  preliminary studies on spaces and places have now become brilliant chapters in the present book.  ... 
doi:10.1108/978-1-80071-737-420221012 fatcat:j7qx6blzbncglo5bsbhw6cfnay

Analog signal processing through space-time digital metasurfaces

Hamid Rajabalipanah, Ali Abdolali, Shahid Iqbal, Lei Zhang, Tie Jun Cui
2021 Nanophotonics  
Exploiting space-time coding strategy enables local, independent, and real-time engineering of not only amplitude but also phase profile of the contributing reflective digital meta-atoms at both central  ...  In the quest to realize analog signal processing using subwavelength metasurfaces, in this paper, we present the first demonstration of programmable time-modulated metasurface processors based on the key  ...  Recently, a new class of metasurfaces called digital coding, and programmable metasurfaces was pioneered by Cui et al. [32] , which is represented in a digital manner with binary codes.  ... 
doi:10.1515/nanoph-2021-0006 fatcat:64ft7i7nxzdqjk3vvb6osht2za

Rudolf Laban and Topological Movement

Nicolas Salazar Sutil
2013 Space and Culture  
Biography Salazar Sutil is a Lecturer in Dance and Digital Arts at the University of Surrey.  ...  The piece begins with an examination of LabanÕs understanding of Space in relation of the notion of the kinesphere.  ...  So his idea of choreutics, or the practical study of space harmony, is based on a distinction between general space, in the way geometry or topology might define space, and space as a field of relations  ... 
doi:10.1177/1206331213475776 fatcat:urvvrtn47rhnnb56342vbe7xg4

THz Instruments for Space

Peter H. Siegel
2007 IEEE Transactions on Antennas and Propagation  
lightweight gases, atoms and molecules in Earth and planetary atmospheres, in regions of interstellar dust and star formation, and in new and old galaxies, back to the earliest days of the universe, from  ...  The former Soviet Union launched the first bolometric detectors for the submillimeter way back in 1974 and operated the first space based submillimeter wave telescope on the Salyut 6 station for four months  ...  Many exciting proposals have already made their way into space agencies in the U.S. , Europe and Japan. China and India have now entered the space race with a passion.  ... 
doi:10.1109/tap.2007.908557 fatcat:tlgnv6antjbd5appu3z5ydlg2u
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