Filters








4,941 Hits in 6.4 sec

Relativistic versus Newtonian Frames

J.-F. Pascual-Sánchez, A. San Miguel, F. Vicente
2013 Positioning  
Only a causal class among the 199 Lorentzian ones, which do not exists in the Newtonian space-time, is privileged to construct a generic, gravity free and immediate (non retarded) relativistic positioning  ...  This is the causal class of the null emission coordinates. Emission coordinates are defined and generated by four emitters broadcasting their proper times.  ...  This is related to the fact that, in Newtonian space-time, any set of space-like vectors always generates a space-like subspace.  ... 
doi:10.4236/pos.2013.41011 fatcat:gywgcey55javxjggp552zbbi7u

Relativistic versus Newtonian frames: emission coordinates [article]

J.-F. Pascual-Sánchez, A. San Miguel, F. Vicente
2010 arXiv   pre-print
This is the causal class of the null emission coordinates. Emission coordinates are defined and generated by four emitters broadcasting their proper times.  ...  Only a causal class among the 199 Lorentzian ones, which do not exists in the Newtonian spacetime, is privileged to construct a generic, gravity free and immediate (non retarded) relativistic positioning  ...  This is related to the fact that, in Newtonian space-time, any set of spacelike vectors always generates a spacelike subspace.  ... 
arXiv:1001.1337v2 fatcat:dpgtdxt6hzhk7bbdmgr3whjvsa

Visiting the Gödel Universe

F. Grave, M. Buser
2008 IEEE Transactions on Visualization and Computer Graphics  
Visualization of general relativity illustrates aspects of Einstein's insights into the curved nature of space and time to the expert as well as the layperson.  ...  In this paper we want to face both issues to reduce the gap between common visualization standards and relativistic visualization.  ...  In order to obtain the remaining two symmetries we need to apply the concept of the Killing vectors. A Killing vector ξ (x) is defined at each point in space time and thus constitutes a field.  ... 
doi:10.1109/tvcg.2008.177 pmid:18989011 fatcat:lif6clqiu5hh3mlgwcv3eobsly

Higher-Spin Theories and Sp(2M) Invariant Space--Time [article]

M.A. Vasiliev
2003 arXiv   pre-print
A formulation of 4d conformal higher spin theories in Sp(8) invariant space-time with matrix coordinates and its extension to Sp(2M) invariant space-times are discussed.  ...  A new result on the global characterizaton of causality of physical events in the Sp(2M) invariant space-time is announced.  ...  This research was supported in part by INTAS, Grant No.99-1-590 and by the RFBR Grants No.02-02-17067 and 00-15-96566.  ... 
arXiv:hep-th/0301235v1 fatcat:hrt7ulopmbg5booyddtnxobsl4

Automatic Generation and Non-Photorealistic Rendering of 2+1D Minkowski Diagrams

Joachim Diepstraten, Daniel Weiskopf, Thomas Ertl
2002 International Conference in Central Europe on Computer Graphics and Visualization  
In this paper, a system is proposed which can automatically generate 2+1D Minkowski diagrams.  ...  Instead of treating space and time independently from each other, Minkowski connected them tightly in the form of a 4D spacetime and introduced spacetime diagrams as a new kind of visualization tool.  ...  Space-time diagrams in textbooks can only show a static image of a fixed scenario and are very often limited to a 2D reduction of 4D spacetime with only one spatial axis.  ... 
dblp:conf/wscg/DiepstratenWE02 fatcat:hejaw74fsvczxluwuygav7lwuq

Multi-view Dynamic Shape Refinement Using Local Temporal Integration

Vincent Leroy, Jean-Sebastien Franco, Edmond Boyer
2017 2017 IEEE International Conference on Computer Vision (ICCV)  
These usually use a single dense volumetric update space or geometric template, which they causally track and update globally frame by frame, with limitations in scalability for larger scenes and in topology  ...  With precision and scalability in mind, we propose a symmetric (non-causal) local time-window geometric integration scheme over temporal sequences, where shape reconstructions are refined framewise by  ...  Real-time, causal approaches.  ... 
doi:10.1109/iccv.2017.336 dblp:conf/iccv/LeroyFB17 fatcat:kmuzm44xoba73cyug6osjhhoku

Simple derivation from postulates of generalized vacuum Maxwell equations [article]

Chun Wa Wong
2013 arXiv   pre-print
On going from the border vector E of the field tensor F to its core vector B, a time index is changed into a space index.  ...  In Section 3, the space-time symmetries of the 4-currents and EM fields in the gvMaxwell equations are described.  ... 
arXiv:1305.3129v1 fatcat:wedlxkjakjgrtpr4izmmkrooky

RELATIVITY, CAUSALITY, LOCALITY, QUANTIZATION AND DUALITY IN THE Sp(2M) INVARIANT GENERALIZED SPACE-TIME [chapter]

M. A. VASILIEV
2002 Multiple Facets of Quantization and Supersymmetry  
of massless fields of all spins in the 4d Minkowski space-time.  ...  The effect of constraints on the localizability of fields in the generalized space-time is analyzed.  ...  In other words, the generalized space-time M M is visualized via Clifford algebras.  ... 
doi:10.1142/9789812777065_0044 fatcat:55rwoxuhuferrjpn5jxrfrbwoa

3D-Aware Video Generation [article]

Sherwin Bahmani, Jeong Joon Park, Despoina Paschalidou, Hao Tang, Gordon Wetzstein, Leonidas Guibas, Luc Van Gool, Radu Timofte
2022 arXiv   pre-print
Recent advances in this field have also enabled high-quality 3D or video content to be generated that exhibits either multi-view or temporal consistency.  ...  We show that our method learns a rich embedding of decomposable 3D structures and motions that enables new visual effects of spatio-temporal renderings while producing imagery with quality comparable to  ...  Acknowledgements This project was supported in part by ARL grant W911NF-21-2-0104, a Vannevar Bush Faculty Fellowship, a gift from the Adobe Corporation, a PECASE by the ARO, NSF award 1839974, Stanford  ... 
arXiv:2206.14797v1 fatcat:66yji7u7gvbvfmnmnkb56g7fem

Gravity waves from cosmic bubble collisions

Michael P Salem, Prashant Saraswat, Edgar Shaghoulian
2013 Journal of Cosmology and Astroparticle Physics  
These gravity waves would produce B-mode polarization in the cosmic microwave background, which could in principle dominate over the inflationary background.  ...  We study bubble collisions in this scenario and find that they generate gravity waves, which are made possible in this context by the reduced symmetry of the global geometry.  ...  MPS and ES thank the organizers of the 2012 Cosmology and Complexity workshop in Hydra, and MPS also thanks the California Institute of Technology, for their warm hospitality.  ... 
doi:10.1088/1475-7516/2013/02/019 fatcat:sjoyx6zgyneo7h5t3c4rxuwzhe

Second to fourth digit ratio and face shape

B. Fink, K. Grammer, P. Mitteroecker, P. Gunz, K. Schaefer, F. L Bookstein, J. T Manning
2005 Proceedings of the Royal Society of London. Biological Sciences  
, but (iii) is three times more intense in men than in women.  ...  We found that (i) prenatal sex steroid ratios (in terms of 2D : 4D) and actual chromosomal sex dimorphism operate differently on faces, (ii) 2D : 4D affects male and female face shape by similar patterns  ...  The vector norms of the regression slope vectors are 0.197 and 0.069, respectively: these are in units of Procrustes distance per unit change in 2D : 4D.  ... 
doi:10.1098/rspb.2005.3179 pmid:16191608 pmcid:PMC1559906 fatcat:bi5gybshhzehdlyhzsjldzo34m

Integral Relativity of Awareness and Energy- The Continuum of Consciousness, Energy, Mind and Matter

Lex Neale
2018 NeuroQuantology  
modeled by Nassim Haramein and William Brown; by Dirk Meijer's 4D quantum modeling of "Consciousness in the Universe"; by Elizabeth Rauscher's "Complex Eight Dimensional Model of Minkowsky Space; by Lex  ...  We propose that the terms Consciousness and Mind be no longer used synonymously in the scientific community, but differentiated as an integral Awareness/Energy continuum between 4D and 5D Hilbert Spaces  ...  And in the center is Which choice do I make? But also in the center is located our ever-present Here/Now, which is not limited to 3D and 4D space-time. Figure 13.  ... 
doi:10.14704/nq.2018.16.8.1267 fatcat:c67grp6szne5bnl46khr6iht3a

A REVIEW OF MULTI-HAZARD RISK ASSESSMENT (MHRA) USING 4D DYNAMIC MODELS

T. Bibi, A. A. Rahman
2015 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
The characteristic of the different 4D dynamic models are based on several main aspects (e.g. space, time, event or phenomenon etc.).  ...  The most suitable 4D dynamic model depends on the type of application it is used for. There is no single 4D Dynamic model suitable for all types of application.  ...  If the time and space both co-ordinates in a particular hazardous situation it may cause a higher risk..  ... 
doi:10.5194/isprsarchives-xl-2-w4-79-2015 fatcat:zg3tefcpgjftjd3eg5stpxsho4

Strategies for the visualization of multiple 2D vector fields

T. Urness, V. Interrante, E. Longmire, I. Marusic, S. O'Neill, T.W. Jones
2006 IEEE Computer Graphics and Applications  
Considering one sample from each of the three visually distinct methods for vector field visualization-texture, glyph, and line (discussed in the sidebar)-we explore the range of effects achievable using  ...  of one vector field in the context of the key physical structures in another.  ...  DNS data is that it's fully resolved and provides full 4D (space and time) data.  ... 
doi:10.1109/mcg.2006.88 pmid:16863100 fatcat:abo7itvsdffznc7t5rrezuio7y

Cellular Psychology Assumption: Based upon Exterior Algebra, It Contributes to Explaining the Variability of the Bioeffects of Magnetic and Electromagnetic Fields

Pierre Le Chapellier, Badri Matta
2012 Neuroscience & Medicine  
Medium stimulation by adequate magnetic fields could modulate this phase shift in a therapeutic direction.  ...  This extension can extend any organic magnitude to 4D event. Thus it allows some perception of the extracellular structure variations.  ...  space-time.  ... 
doi:10.4236/nm.2012.33029 fatcat:mmhfza6emvcwnprsvmq5y2a7ni
« Previous Showing results 1 — 15 out of 4,941 results