Filters
Results 1 - 10 of 6199
Results 1 - 10 of 6199.
Search took: 0.026 seconds
Sort by: date | relevance |
AbstractAbstract
[en] Various controversial aspects of the ''hierachical clustering'' and ''pancake'' theories for galaxy formation are reviewed. Recent numerical simulations show that both theories are capable of providing an explanation for the observed galaxy correlation function, though it is necessary to adopt a variant of the hierachical model that takes account of galaxy mergers. A critical problem for the pancake theory is the fate of fluctuations during the recombination period. The new technique of Jones and Wyse (1982) for handling this reduces the problem to solving two linear ordinary differential equations for the velocity and radiation field fluctuation amplitudes. Finally, the question of the initial conditions for these theories, and the evolution of energy density perturbations is discussed
Primary Subject
Source
Audouze, J.; Tran Thanh Van, J. (eds.); 405 p; ISBN 2-86332-015-7;
; 1982; p. 215-228; Editions Frontieres; Gif-sur-Yvette (France); 17. Rencontre de Moriond - Astrophysics meeting; Les Arcs (France); 14 - 26 Mar 1982

Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
La nebuleuse de Gum
Primary Subject
Record Type
Journal Article
Journal
Sciences et Avenir; (no.303); p. 362-369
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Bharath, Rose Dawn, E-mail: drrosedawn@yahoo.com2014
AbstractAbstract
[en] The last 25 years have seen functional magnetic resonance imaging (fMRI) grow from an interesting experimental imaging technique in the hands of some to a primary investigation of choice in the localization and lateralization of brain function prior to surgery. Developments in the field of computational neurosciences have transformed fMRI analysis from classical subtractive type analysis to dynamic casual modeling, and now to graph theory analysis. This has widened the scope of fMRI, and is therefore finding applications in understanding neural correlates of diseases like autism and Alzheimer's disease, prognostication of diseases like traumatic brain injury, and has the potential to direct therapy. It is unfortunately true that this widened ambit has not received the clinical attention it deserves, probably because fMRI is susceptible to artifacts from skull base and blood products and has reduced sensitivity in patients with vascular malformations, or because a change in medical practice usually lags behind the technological and scientific developments that make it possible. This review focuses on the developmental chronology of fMRI image analysis in the last 25 years with highlights on major milestones like developments in the field of paradigms, analysis methods, resting state fMRI, and functional connectivity. To make the statistical images of brain at work more colorful, the article starts with genesis of fMRI and ends with the hope of a promising bright future. Many inputs for this article are obtained from a series of 103 review articles edited by Bandettini et al., compiling personal experiences of pioneers in this field. Interested readers are encouraged to refer to these for a more complete overview.
Primary Subject
Source
Available from http://dx.doi.org/10.4103/0971-3026.130684; Available from http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4028917; PMCID: PMC4028917; PMID: 24851000; PUBLISHER-ID: IJRI-24-6; OAI: oai:pubmedcentral.nih.gov:4028917; Copyright: (c) Indian Journal of Radiology and Imaging; This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Indian Journal of Radiology and Imaging - New Series (Print); ISSN 0971-3026;
; v. 24(1); p. 6-12

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
No abstract available
Primary Subject
Record Type
Journal Article
Journal
Monthly Notices of the Royal Astronomical Society; v. 167(1); p. 55-61
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Ramani, A; Grammaticos, B, E-mail: grammaticos@univ-paris-diderot.fr2014
AbstractAbstract
[en] We present two new discrete Painlevé equations the coefficients of which are expressed in terms of the seventh root of unity and have, thus, a periodicity of 7. We describe the procedure for the derivation of equations with maximal periodicity and explain the origin of these systems in geometrical terms. (fast track communications)
Primary Subject
Source
Available from http://dx.doi.org/10.1088/1751-8113/47/19/192001; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Journal of Physics. A, Mathematical and Theoretical (Online); ISSN 1751-8121;
; v. 47(19); [8 p.]

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
Reeves, Hubert (ed.); Centre National de la Recherche Scientifique, 75 - Paris (France); p. 311; 1972; Centre National de la Recherche Scientifique; Paris, France; Symposium on the origin of the solar system; Nice, France; 03 Apr 1972
Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Primary Subject
Source
Copyright (c) 1999 Springer-Verlag; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
Lincoln, Don
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States). Funding organisation: USDOE Office of Science - SC, High Energy Physics (HEP) (SC-25) (United States)2017
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States). Funding organisation: USDOE Office of Science - SC, High Energy Physics (HEP) (SC-25) (United States)2017
AbstractAbstract
[en] Here, physics can be a weighty subject, full of substance and gravitas. It is therefore perhaps entirely reasonable that a central topic of the discipline is mass. But what is mass, really? What is the origin and nature of this most essential feature of the world around us? And are there any surprises to be had as we dig deeper into that question? In this article, I hope to surprise every reader at least once.
Primary Subject
Source
FERMILAB-PUB--17-477-PPD; OSTIID--1439976; AC02-07CH11359; Available from https://www.osti.gov/servlets/purl/1439976; DOE Accepted Manuscript full text, or the publishers Best Available Version will be available free of charge after the embargo period
Record Type
Journal Article
Journal
Physics Teacher; ISSN 0031-921X;
; v. 55(7); p. 401-405

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
[en] The outcomes of asteroidal catastrophic collisions are strongly affected by the target asteroid's gravity, since only the fragments escaping with initial velocities higher than the target's escape velocity are not reaccumulated into 'rubble pile' remnants. This idea can be compared with the observational evidence on the properties of family asteroids in several ways: (1) the shape and spin period of the 'reaccumulated' family asteroids will roughly fit the relationships valid for self-gravitating fluid bodies; (2) the relative velocities of the few escaping fragments arising from a breakup event marginally overcoming self-gravity will often have an anisotropic distribution, affecting the final distribution of orbital elements; (3) the amount of mass which in a given family escaped to 'infinity' will be correlated with the target's size, since only for objects larger than approx. 100 km self-gravity plays an important role. These predictions are discussed and compared with the available data. (Auth.)
Primary Subject
Source
Markellos, V.V. (Patras Univ. (Greece)); Kozai, Y. (Tokyo Univ., Mitaka (Japan). Tokyo Astronomical Observatory) (eds.); Astrophysics and Space Science Library; v. 106; 424 p; ISBN 90-277-1650-1;
; 1983; p. 177-188; D. Reidel; Dordrecht (Netherlands); 74. Colloquium of the International Astronomical Union on dynamical trapping and evolution in the solar system; Gerakini (Greece); 30 Aug - 2 Sep 1982

Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
La classification spectrale des etoiles β Canis Majoris et leur position dans le diagramme HR
Primary Subject
Record Type
Journal Article
Journal
Compt. Rend., Ser. B; v. 274(14); p. 911-914
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |