2,234 research outputs found
On unitary convex decompositions of vectors in a -algebra
No full textsummary:By exploiting his recent results, the author further investigates the extent to which variation in the coefficients of a unitary convex decomposition of a vector in a unital -algebra permits the vector decomposable as convex combination of fewer unitaries; certain -algebra results due to M. Rørdam have been extended to the general setting of -algebras
The Primitive Temple, an 11th dynasty provincial temple
No full textMedamud, located north of Karnak, was excavated by two teams from the IFAO led by
Fernand Bisson de la Roque (between 1925 and 1932) and by Clément Robichon (1933-1940).
The excavations were conducted at the temple dedicated to of Montu (most often called Mnṯw
nb Wȝs.t kȝ ḥry-jb Mȝdw, "Montu, lord of Thebes, the bull who dwells in Medamud"). This
temple was originally built during the Middle and New Kingdoms, and it was later modified by
the Ptolemies and finally embellished under the reigns of Roman emperors1. Among the data
gathered by the early excavators, one of the least well-documented records is related to a brick
building known in Egyptological literature as the "primitive temple". It was discovered in 1938
by Cl. Robichon and Alexandre Varille during the exploration of the foundations of the eastern
part of the Ptolemaic temple. Several metres underground, they discovered several brick layers
that outlined the shape of an original monument with two sinuous corridors, each one covered
by a mound and a sacred wood. A polygonal enclosure wall would have surrounded the
monument and was opened with a pylon2. However, the lack of publications and of
archaeological data led to the very existence of the remains being questioned3
Erratum: Half-supersymmetric solutions in five-dimensional supergravity (Journal of High Energy Physics (2007) 12 (025))
No full text[No abstract available]Gutowski JB, 2007, J HIGH ENERGY PHYS11
Surjective isometries between unitary sets of unital JB∗-algebras
No full textWe would like to thank Prof. Lajos Molnár for encouraging us to explore this problem.
We are also indebted to the anonymous reviewer for several useful comments.
First and fifth authors partially supported by the Spanish Ministry of Science, Innovation and Universities (MICINN) and European Regional Development Fund project
no. PGC2018-093332-B-I00, Programa Operativo FEDER 2014-2020 and Consejería de
Economía y Conocimiento de la Junta de Andalucía grant numbers A-FQM-242-UGR18
and FQM375. First author partially supported by EPSRC (UK) project “Jordan Algebras, Finsler Geometry and Dynamics” ref. no. EP/R044228/1. Second author partially
supported by JSPS KAKENHI Grant Number JP 21J21512. Fourth author partially
supported by JSPS KAKENHI (Japan) Grant Number JP 20K03650.
* Funding for open access charge: Universidad de Granada / CBUAThis paper is, in a first stage, devoted to establishing a topological–algebraic characterization of the principal component, U0(M), of the set of unitary elements, U(M), in a unital JB⁎-algebra M. We arrive to the conclusion that, as in the case of unital C⁎-algebras, U0(M)=M1−1∩U(M)={Ue⋯Ue(1):n∈N,hj∈Msa∀1≤j≤n}={u∈U(M): there exists w∈U0(M) with ‖u−w‖<2} is analytically arcwise connected. Actually, U0(M) is the smallest quadratic subset of U(M) containing the set eiM. Our second goal is to provide a complete description of the surjective isometries between the principal components of two unital JB⁎-algebras M and N. Contrary to the case of unital C⁎-algebras, we shall deduce the existence of connected components in U(M) which are not isometric as metric spaces. We shall also establish necessary and sufficient conditions to guarantee that a surjective isometry Δ:U(M)→U(N) admits an extension to a surjective linear isometry between M and N, a conclusion which is not always true. Among the consequences it is proved that M and N are Jordan ⁎-isomorphic if, and only if, their principal components are isometric as metric spaces if, and only if, there exists a surjective isometry Δ:U(M)→U(N) mapping the unit of M to an element in U0(N). These results provide an extension to the setting of unital JB⁎-algebras of the results obtained by O. Hatori for unital C⁎-algebras.CBUAConsejería de Economía y Conocimiento de la Junta de Andalucía
A-FQM-242-UGR18, FQM375Ministerio de Ciencia, Innovación y UniversidadesEngineering and Physical Sciences Research Council
EP/R044228/1Universidad de GranadaMinisterio de Ciencia e InnovaciónJapan Society for the Promotion of Science JP 20K03650, JP 21J21512European Regional Development Fund
PGC2018-093332-B-I0
Howard Johnson\u27s
No full textBlack and white photograph of the front of the Howard Johnson\u27s restaurant at the corner of West Temple and South Temple, probably in the 1960s or 1970s. The hotel is now the Plaza, and the restaurant is JB\u27s
Isometries of half supersymmetric time-like solutions in five dimensions
No full textSpinorial geometry techniques have recently been used to classify all half supersymmetric solutions in gauged five-dimensional supergravity with vector multiplets. In this paper we consider solutions for which at least one of the Killing spinors generates a time-like Killing vector. We obtain coordinate transformations which considerably simplify the solutions, and in a number of cases, we obtain explicitly some additional Killing vectors which were hidden in the original analysis. © 2010 IOP Publishing Ltd.Behrndt K, 1998, PHYS LETT B, V442, P97, DOI 10.1016-S0370-2693(98)01208-8; Cacciatori SL, 2003, J HIGH ENERGY PHYS; Elvang H, 2005, PHYS REV D, V71, DOI 10.1103-PhysRevD.71.024033; Elvang H, 2004, PHYS REV LETT, V93, DOI 10.1103-PhysRevLett.93.211302; Figueroa-O'Farrill J, 2007, CLASSICAL QUANT GRAV, V24, P4429, DOI 10.1088-0264-9381-24-17-010; Gauntlett JP, 2003, CLASSICAL QUANT GRAV, V20, P4587, DOI 10.1088-0264-9381-20-21-005; Gauntlett JP, 2003, PHYS REV D, V68, DOI 10.1103-PhysRevD.68.105009; Gauntlett JP, 2005, PHYS REV D, V71, DOI 10.1103-PhysRevD.71.025013; Gauntlett JP, 2005, PHYS REV D, V71, DOI 10.1103-PhysRevD.71.045002; Gillard J, 2005, CLASSICAL QUANT GRAV, V22, P1033, DOI 10.1088-0264-9381-22-6-009; Gran U, 2007, J HIGH ENERGY PHYS; Gran U, 2005, CLASSICAL QUANT GRAV, V22, P2453, DOI 10.1088-0264-9381-22-12-010; Gran U, 2006, NUCL PHYS B, V753, P118, DOI 10.1016-j.nuclphysb.2006.07.007; Grover J, 2007, CLASSICAL QUANT GRAV, V24, P417, DOI 10.1088-0264-9381-24-2-009; Grover J, 2008, J HIGH ENERGY PHYS; Gutowski JB, 2004, J HIGH ENERGY PHYS; Gutowski JB, 2007, J HIGH ENERGY PHYS; Gutowski JB, 2004, J HIGH ENERGY PHYS; Gutowski JB, 2005, J HIGH ENERGY PHYS; Gutowski JB, 2004, J HIGH ENERGY PHYS; Harvey F., 1990, SPINORS CALIBRATIONS; Klemm D, 2000, PHYS REV D, V62, DOI 10.1103-PhysRevD.62.024003; Klemm D, 2001, J HIGH ENERGY PHYS; Klemm D, 2001, PHYS LETT B, V503, P147, DOI 10.1016-S0370-2693(01)00181-2; Kunduri HK, 2007, J HIGH ENERGY PHYS; Kunduri HK, 2006, J HIGH ENERGY PHYS; Kunduri HK, 2007, J HIGH ENERGY PHYS; Lawson H. B., 1989, SPIN GEOMETRY; TOD KP, 1983, PHYS LETT B, V121, P241, DOI 10.1016-0370-2693(83)90797-9; Wang M.-Y., 1989, ANN GLOB ANAL GEOM, V7, P59, DOI 10.1007-BF0013740212
Flexible time–space network formulation and hybrid metaheuristic for conflict-free and energy-efficient path planning of automated guided vehicles
No full textOperations of Automated Guided Vehicles (AGVs) are desired to be more energy-efficient while maintaining high transport productivity, motivated by the green production requirements. This paper investigates a new energy-efficient planning problem for determining conflict-free paths of the AGVs in its transport roadmap. In this problem, the vehicle path and transport time in the roadmap are jointly optimized, based on a flexible time–space network (FTSN). We provide the mathematical problem formulation of the energy-efficient path planning problem. The resulting optimization problem is proved to be a non-convex mixed-integer nonlinear programming which is computationally intractable. We further propose a hybrid metaheuristic that integrates the genetic algorithm and estimation of the distribution algorithm to improve its computational efficiency. Numerical results show the effectiveness of the developed algorithm based on the FTSN framework, compared to the existing metaheuristics, the conventional path planning method, and a commercial solver. The proposed method has a wide application in improving energy use of material handling, providing a guiding significance on promoting cleaner production of flexible manufacturing systems.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Transport Engineering and Logistic
Decoupling of genome size and sequence divergence in a symbiotic bacterium
No full textAuthor Posting. © American Society for Microbiology, 2000. This article is posted here by permission of American Society for Microbiology for personal use, not for redistribution. The definitive version was published in Journal of Bacteriology 182 (2000): 3867-3869, doi:10.1128/JB.182.13.3867-3869.2000.In contrast to genome size variation in most bacterial taxa, the small genome size of Buchnera sp. was shown to be highly conserved across genetically diverse isolates (630 to 643 kb). This exceptional size conservation may reflect the inability of this obligate mutualist to acquire foreign DNA and reduced selection for genetic novelty within a static intracellular environment.Financial support was provided by a National Institute of Health
postdoctoral training grant to J.J.W. (Center for Insect Science, University
of Arizona) and a National Science Foundation grant (DEB-
9815413) to N.A.M
Vertical transmission of biosynthetic plasmids in aphid endosymbionts (Buchnera)
No full textAuthor Posting. © American Society for Microbiology, 2001. This article is posted here by permission of American Society for Microbiology for personal use, not for redistribution. The definitive version was published in Journal of Bacteriology 183 (2001): 785-790, doi:10.1128/JB.183.2.785-790.2001.This study tested for horizontal transfer of plasmids among Buchnera aphidicola strains associated with
ecologically and phylogenetically related aphid hosts (Uroleucon species). Phylogenetic congruence of Buchnera
plasmid (trpEG and leuABC) and chromosomal (dnaN and trpB) genes supports strictly vertical long-term transmission
of plasmids, which persist due to their contributions to host nutrition rather than capacity for infectious
transfer. Synonymous divergences indicate elevated mutation on plasmids relative to chromosomal genes.This work was supported by a National Institutes of Health postdoctoral
training grant in Molecular Insect Science (Center for Insect
Science, University of Arizona) to J.J.W. and a National Science Foundation
grant (DEB-9815413) to N.A.M
Tn5 synaptic complex formation : role of transposase residue W450
No full textAuthor Posting. © American Society for Microbiology, 2008. This article is posted here by permission of American Society for Microbiology for personal use, not for redistribution. The definitive version was published in Journal of Bacteriology 190 (2008): 1484-1487, doi:10.1128/JB.01488-07.A series of Tn5 transposases (Tnp's) with mutations at the conserved amino acid position W450, which was structurally predicted to be important for synapsis, have been generated and characterized. This study demonstrates that W450 is involved in hydrophobic (and possibly aromatic) contacts within the Tnp monomer that negatively regulate synaptic complex formation.This work was supported by the NIH (grant no. GM50693) and the University of Wisconsin—Madison (grant no. WIS04792) and through the Evelyn Mercer Professorship in Biochemistry and Molecular Biology
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