نتایج جستجو برای: torsion graphs

تعداد نتایج: 115365  

2008
Chih-Hung Wang

We investigate a linearized tensor-tensor theory of gravity with torsion and a perturbed torsion wave solution is discovered in background Minkowski spacetime with zero torsion. Furthermore, gauge transformations of any perturbed tensor field are derived in general background non-Riemannian geometries. By calculating autoparallel deviations, both longitudinal and transverse polarizations of the...

1998
L. C. Garcia de Andrade

The Meissner effect for superconductors in spacetimes with tor-sion is revisited.Two new physical interpretations are presented.The first considers the Landau-Ginzburg theory yields a new symmetry-breaking vacuum depending on torsion.In the second interpretation a gravitational Meissner torsional effect where when the Higgs field vanishes, torsion and electromagnetic fields need not vanish and ...

2001
V. B. Bezerra C. N. Ferreira

We obtain the solution that corresponds to a screwed superconducting cosmic string (SSCS) in the framework of a general scalar-tensor theory including torsion. We investigate the metric of the SSCS in Brans-Dicke theory with torsion and analyze the case without torsion. We show that in the case with torsion the space-time background presents other properties different from that in which torsion...

Journal: :Equine veterinary journal 2007
K P Chaney S J Holcombe M M LeBlanc J G Hauptman R M Embertson P O E Mueller W L Beard

REASONS FOR PERFORMING STUDY Anecdotal speculation suggests that prognosis for survival of mares and foals following correction of uterine torsion has improved over the past 30 years. OBJECTIVES To determine statistically the outcome of uterine torsion according to duration of clinical signs, stage of gestation, parity, physical examination findings, method of correction, prognosis for surviv...

2016
Navdeep Singh Sarvpreet Singh Ghuman Vinod Kumar Gandotra

The aim of study was doppler ultrasonography-aided assessment of uterine blood fl ow in relation to duration and degree of uterine torsion in cattle. Fourteen dairy cattle with uterine torsion were detorted and fetal delivery was completed after detorsion. Six live and eight dead calves were delivered by cattle having torsion from lesser and prolonged duration, respectively. Whereas the dams of...

Journal: :Asian journal of andrology 2009
Lin Chen Wei-Wei Zhan Zhou-Jun Shen Wen-Bin Rui Chen Lv Man Chen Jian-Qiao Zhou Ping Zhou Mi Zhou Ying Zhu

The changes of blood perfusion of contralateral testis after unilateral testicular torsion remain controversial. In this study, 28 New Zealand white male rabbits were randomly divided into five groups. Group A (n = 8), the control group, underwent a sham operation on the unilateral testis without inducing testicular torsion. In groups B, C, and D (n = 5 each), unilateral testicular torsion was ...

‎‎In the category of Mordell curves (E_D:y^2=x^3+D) with nontrivial torsion groups we find curves of the generic rank two as quadratic twists of (E_1), ‎and of the generic rank at least two and at least three as cubic twists of (E_1). ‎Previous work‎, ‎in the category of Mordell curves with trivial torsion groups‎, ‎has found infinitely many elliptic curves with ...

Journal: :iranian journal of mathematical chemistry 2014
z. yarahmadi s. moradi

the center (periphery) of a graph is the set of vertices with minimum (maximum)eccentricity. in this paper, the structure of centers and peripheries of some classes ofcomposite graphs are determined. the relations between eccentricity, radius and diameterof such composite graphs are also investigated. as an application we determinethe center and periphery of some chemical graphs such as nanotor...

Journal: :transactions on combinatorics 2012
alireza abdollahi

we study the set of all determinants of adjacency matrices of graphs with a given number of vertices. using brendan mckay's data base of small graphs, determinants of graphs with at most $9$ vertices are computed so that the number of non-isomorphic graphs with given vertices whose determinants are all equal to a number is exhibited in a table. using an idea of m. newman, it is proved that if $...

Journal: :acta medica iranica 0
majid taati department of pathobiology, school of veterinary medicine, lorestan university, khorramabad, iran. mehrnoush moghadasi department of physiology, school of medicine, lorestan university of medical sciences, khoramabad, iran. omid dezfoulian department of pathobiology, school of veterinary medicine, lorestan university, khorramabad, iran. peyman asadian department of pathobiology, school of veterinary medicine, lorestan university, khorramabad, iran. and research associate at ontario veterinary college, university of guelph, canada.

ischemia-reperfusion injury is a possible cause of testicular damage and infertility after testicular torsion and detorsion. the purpose of this study was to evaluate the effect of ghrelin on testicular ischemia-reperfusion damage. a total of 30 adult male rats were selected for the study and divided randomly into 3 groups, each containing 10 rats. animals in the testicular torsion and ghrelin ...

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