Search results for "fundamental"

showing 10 items of 535 documents

ApproximatingL 2-invariants by their finite-dimensional analogues

1994

LetX be a finite connectedCW-complex. Suppose that its fundamental group π is residually finite, i.e. there is a nested sequence ... ⊂ Г m + 1 ⊂ Г m ⊂ ... ⊂ π of in π normal subgroups of finite index whose intersection is trivial. Then we show that thep-thL 2-Betti number ofX is the limit of the sequenceb p(Xm)/[π:Г m ] whereb p(Xm) is the (ordinary)p-th Betti number of the finite covering ofX associated with Г m .

Normal subgroupCombinatoricsDiscrete mathematicsSequenceFundamental groupIntersectionBetti numberGeometry and TopologyLimit (mathematics)AnalysisMathematicsCW complexGeometric and Functional Analysis
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Actinide and lanthanide molecules to search for strong CP-violation

2020

The existence of the fundamental CP-violating interactions inside the nucleus leads to the existence of the nuclear Schiff moment. The Schiff moment potential corresponds to the electric field localized inside the nucleus and directed along its spin. This field can interact with electrons of an atom and induce the permanent electric dipole moment (EDM) of the whole system. The Schiff moment and corresponding electric field are enhanced in the nuclei with the octupole deformation leading to the enhanced atomic EDM. There is also a few-order enhancement of the T,P-violating effects in molecules due to the existence of energetically close levels of opposite parity. We study the Schiff moment e…

Nuclear TheoryAtomic Physics (physics.atom-ph)HadronNuclear TheoryGeneral Physics and AstronomyFOS: Physical sciencesElectron01 natural sciencesPhysics - Atomic PhysicsNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)Electric fieldPhysics - Chemical Physics0103 physical sciencesPhysics::Atomic PhysicsPhysical and Theoretical Chemistry010306 general physicsNuclear ExperimentPhysicsChemical Physics (physics.chem-ph)010308 nuclear & particles physicsDiatomic moleculeFundamental interactionElectric dipole momentHigh Energy Physics - PhenomenologyDiamagnetismCP violationAtomic physics
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Initial state azimuthal anisotropies in small collision systems

2015

Strong multiparticle azimuthal correlations have recently been observed in high energy proton-nucleus collisions. While final state collective effects can be responsible for many of the observations, the domain structure in the classical color field of a high energy nucleus also naturally leads to such correlations. We describe recent calculations of the momentum space 2-particle cumulant azimuthal anisotropy coefficients v_n{2}, n=2,3,4 from fundamental representation Wilson line distributions describing the high energy nucleus. We find significant differences between Wilson lines from the MV model and from JIMWLK evolution. We also discuss the relation of this calculation to earlier work …

Nuclear and High Energy PhysicsHigh energyNuclear Theoryazimuthal correlationsFOS: Physical sciencesPosition and momentum space01 natural sciencesNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)Electric field0103 physical sciencesmedicine010306 general physicsAnisotropyNuclear Experimentazimuthal anisotropiesPhysicsta114010308 nuclear & particles physicsCollisionAzimuthHigh Energy Physics - Phenomenologymedicine.anatomical_structureQuantum electrodynamicsFundamental representationcollision systemsNucleus
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Pinch technique for Schwinger-Dyson equations

2007

40 pages, 11 figures.-- ISI Article Identifier: 000245922000041.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0611354

Nuclear and High Energy PhysicsParticle physicsGeneralizationStructure (category theory)FOS: Physical sciencesContext (language use)Skeleton (category theory)Theoretical physicsHigh Energy Physics - Phenomenology (hep-ph)Self-energiesBackground-field MethodAbelian Gauge TheoriesPhysicsBackground field methodScalar (physics)FísicaPerturbation-theoryEffective ChargeFundamental interaction3-point VertexHigh Energy Physics - PhenomenologyNonperturbative EffectsQuantum Chromodynamics (QCD)Gauge SymmetryPinchBRST SymmetryJournal of High Energy Physics
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Glueball enhancement by color deconfinement

2007

5 pages, 4 figures.-- PACS nrs.: 14.80.-j; 24.80.+y; 25.75.Nq.-- ISI Article Identifier: 000245333000063.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0609219

Nuclear and High Energy PhysicsParticle physics[PACS] Nuclear tests of fundamental interactions and symmetriesNuclear Theory[PACS] Quark deconfinement quark-gluon plasma production and phase transitions in heavy-ion collisionsHigh Energy Physics::LatticeFOS: Physical sciencesDeconfinementQuantum chromodynamics (QCD)Nuclear Theory (nucl-th)Nuclear physicsHigh Energy Physics - Phenomenology (hep-ph)Color confinementNuclear ExperimentNuclear theoryQuantum chromodynamicsPhysicsQuark confinementGlueball[PACS] Other particles (including hypothetical)High Energy Physics::PhenomenologyFísicaHigh Energy Physics - PhenomenologyColor modelHeavy ion-nucleus reactions
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Demonstration of the double Penning Trap technique with a single proton

2013

Spin flips of a single proton were driven in a Penning trap with a homogeneous magnetic field. For the spin-state analysis the proton was transported into a second Penning trap with a superimposed magnetic bottle, and the continuous Stern-Gerlach effect was applied. This first demonstration of the double Penning trap technique with a single proton suggests that the antiproton magnetic moment measurement can potentially be improved by three orders of magnitude or more. Spin flips of a single proton were driven in a Penning trap with a homogeneous magnetic field. For the spin-state analysis the proton was transported into a second Penning trap with a superimposed magnetic bottle, and the cont…

Nuclear and High Energy PhysicsProtonOrders of magnitude (temperature)Atomic Physics (physics.atom-ph)Other Fields of PhysicsFOS: Physical sciencesGeonium atomPenning traps01 natural sciencesphysics.atom-phPhysics - Atomic Physics010305 fluids & plasmasFundamental symmetries0103 physical sciencesPhysics::Atomic and Molecular ClustersPhysics::Atomic Physics010306 general physicsSpin (physics)Nuclear ExperimentPhysicsPenning trapCPT testsMagnetic fieldAntiprotonPhysics::Accelerator PhysicsIon trapAtomic physicsPhysics Letters B
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On the numerical solution of axisymmetric domain optimization problems by dual finite element method

1994

Shape optimization of an axisymmetric three-dimensional domain with an elliptic boundary value state problem is solved. Since the cost functional is given in terms of the cogradient of the solution, a dual finite element method based on the minimum of complementary energy principle is used. © 1994 John Wiley & Sons, Inc.

Numerical AnalysisFinite element limit analysisApplied MathematicsMathematical analysisMixed finite element methodBoundary knot methodFinite element methodComputational MathematicsMethod of fundamental solutionsShape optimizationAnalysisMathematicsExtended finite element methodFree energy principleNumerical Methods for Partial Differential Equations
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Florence Nightingale and the Spanish nursing school of Santa Isabel De Hungría (1896).

2021

PURPOSE The Spanish surgeon Federico Rubio-Gali worked at St. Thomas Hospital in England at the time when Florence Nightingale founded the Nightingale Training School for Nurses (1860). Apparently, he was quite aware of Nightingale's nursing work and expertise and it is known that founded the first Spanish nursing school, in Madrid, in 1896. This led us to wonder if the emergence of his school was purely by chance or was connected to what its founder learned in England. Likely, this learned knowledge led him to apply Nightingale's ideas and to put them into practice in his institution. METHODS We used content analysis techniques and developed categories and subcategories to search for ideol…

Nursing practiceResearch and Theorymedia_common.quotation_subjectPerspective (graphical)Schools NursingHistory 19th CenturyWonderNursingContent analysisHistory of nursingInstitutionComparative historical researchHumansFundamentals and skillsSociologyIdeologyHistory of Nursingmedia_commonInternational journal of nursing knowledgeREFERENCES
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Cultural institutions as agents of urban and community regeneration in the (post-)pandemic city. The case of the «Laboratorio Zen Insieme» in Palermo

2022

Although all cities in the world have been affected by the COVID-19 pandemic, its impacts on the territories, yet to be understood, are unevenly distributed, revealing extremely varied imbalances depending on the places. However, it is clear that the virus and its variants have aggravated pre-existing socio-spatial inequalities, creating new ones and bringing attention back to those implications between space, planning, public health and citizenship that are at the origins of contemporary urbanism. In a reference framework in which the crisis is globalized but unequal and in the absence of a welfare system capable of responding to the urgencies of the most marginalized social contexts and g…

Olsen 2018Settore ICAR/21 - UrbanisticaSettore M-GGR/01 - GeografiaSacco and Blessi 2009). In the current (post-) pandemic context and through the lens of a southern European perspective the purpose of this article is to critically reflect about the role of culture as possible vehicle of urban and community regeneration. In particular we will focus on the activities of the no profit organization «Laboratorio Zen Insieme» in ZEN2 one of the last large popular and peripheral neighborhoods built in Palermo at the end of 80s in order to explore and understand how cultural practices work as agent of urban and social transformation capable of addressing emerging issues especially in the pandemic scenario we are experiencing. Thecasestudy has been conducted through analysis of documents participative observations (Honer and Hitzler 2015) and qualitative in-depth interviews with key actors involved in the conception organization and management of the activities carried out by Laboratorio Zen Insieme with representatives of local institutions and non-formal conversations with participants of the workshops heldin the neighborhood. The experience we narrate finds that cultural practices have re-conceptualized their design and functions as strategies of urban and community regeneration and at the same time have contributed to answer to emergent issues in developing proximity and local based strategies facing up to problems inherent civil rights educationalpoverty socio-spatial justice and have changed the image and identity of urban places they inhabit.In this sense the research provides a framework for development of strategies and legitimization for cultural practices and a point of discussionabouttheirrolein urban development.Although all cities in the world have been affected by the COVID-19 pandemic its impacts on the territories yet to be understood are unevenly distributed revealing extremely varied imbalances depending on the places. However it is clear that the virus and its variants have aggravated pre-existing socio-spatial inequalities creating new ones and bringing attention back to those implications between space planning public health and citizenship that are at the origins of contemporary urbanism. In a reference framework in which the crisis is globalized but unequal and in the absence of a welfare system capable of responding to the urgencies of the most marginalized social contexts and groups a response to the new social and individual needs has been offered by cultural institutions that play a role of territorial agency often independently or in the absence of political institutions. Far from the idea of entertainment and divertissement it is in fact increasingly clear how the practices of cultural innovation experimenting with various forms of action and participation can in some cases play a fundamental role in the processes of social cohesion and community building representing an antidote to the worsening of the phenomena of marginalization and socio-spatial inequalities within cities and territories (Colantonio and Dixon 2011
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An Integrated Neural and Algorithmic System for Optical Flow Computation

1997

Motion detection plays a central role in several visual environments: knowledge of object velocities and trajectories is fundamental in scene interpretation and segmentation. This task appears a simple problem, but detecting moving objects is very difficult, in fact this is a problem that cannot be considered completely solved today [1] [2] [3].

Optical flow computationbusiness.industryComputer scienceEpipolar geometryEpipolar lineOptical flowMotion detectionSegmentationComputer visionArtificial intelligenceFundamental matrix (computer vision)business
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