Search results for "AH"

showing 10 items of 6917 documents

Polynomial identities with involution and the hyperoctahedral group

1987

AlgebraCombinatoricsInvolution (mathematics)Hyperoctahedral groupMathematics
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Quantum Groups, Star Products and Cyclic Cohomology

1993

After some historical remarks, we start with a rapid overview of the star-product theory (deformation of algebras of functions on phase space) and its applications to deformation-quantization. We then concentrate on Poisson-Lie groups and their “quantization”, give a star-product realization of quantum groups and discuss uniqueness and the rigidity as bialgebra of a universal model for the quantum SL(2) groups. In the last part we develop the notion of closed star-product (for which a trace can be defined on the algebra), show that it is classified by cyclic cohomology, permits to define a character and that there always exists one; finally we show that the pseudodifferential calculus on a …

AlgebraStar productPhase spaceCyclic homologyUniquenessRiemannian manifoldQuantumAtiyah–Singer index theoremMathematicsBialgebra
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L'eau et les territoires sahariens en Algérie, Mutations et enjeux

2007

International audience; Les rapports complexes et multiformes que les territoires entretiennent avec la question hydraulique prennent au Sahara une dimension toute particulière. Les mutations territoriales du XXe siècle qui l'ont caractérisé – urbanisation, accroissement démographique, intégration territorial... – ont remis en cause le fragile équilibre qui s'était institué depuis des siècles entre l'homme et son environnement. Ces mutations complexes ont engendré de nombreuses interrogations quant à la gestion actuelle et future de la question hydraulique au sein des territoires sahariens. Nous nous proposons ici de mettre en lumière quelques éléments permettant d'appréhender cette questio…

AlgérieMutations territorialesRessources hydrauliquesGestion territoriale[SHS.GEO] Humanities and Social Sciences/Geography[SHS.GEO]Humanities and Social Sciences/GeographySahara[ SHS.GEO ] Humanities and Social Sciences/Geography
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Infrastructures et oasis relais migratoires au Sahara algérien

2005

International audience

Algérie[SHS.GEO] Humanities and Social Sciences/GeographyOasis[SHS.GEO]Humanities and Social Sciences/GeographyComputingMilieux_MISCELLANEOUSMigrationSahara[ SHS.GEO ] Humanities and Social Sciences/Geography
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L'action publique et les réseaux de transport au Sahara algérien, étapes d'une intégration territoriale pour un développement régional

2008

Aujourd'hui espace d'enjeux géostratégiques, le Sahara représente pour l'Algérie, comme pour les différents états du Maghreb, un hinterland porteur et vecteur de développement économique. Champs pétroliers, ressources en minerais et aquifères souterrains sont autant d'éléments qui, combinés à des considérations géopolitiques nationales et internationales, ont justifié une intégration au territoire national des vastes espaces sahariens. Au lendemain de l'indépendance algérienne (1962), l'appropriation et l'intégration de ces espaces sahariens constituèrent des enjeux capitaux dans la construction de l'État-nation, celui-ci devant s'appuyer tout d'abord sur un territoire unifié et maîtrisé. L…

Algérie[SHS.GEO] Humanities and Social Sciences/Geography[SHS.GEO]Humanities and Social Sciences/Geographyréseaux désenclavementinfrastructures de transportaction publiqueSahara[ SHS.GEO ] Humanities and Social Sciences/Geography
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Responses of two sisters to the surrounding societies in Brick Lane (2003) by Monica Ali

2011

Ali Monicanaisetsiirtolaisetperheyhteiskuntamaahanmuuttajatjärjestetty avioliittotyöislamuskonto
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Asthma, allergies and respiratory symptoms in different activity groups of swimmers exercising in swimming halls

2021

Abstract Background Respiratory symptoms are common in competitive swimmers. However, among these and in swimmers at other activity levels the swimming distance, the total spent time in swimming halls and their medical background varies. Our objectives were, first, to assess their medical histories and the associations with respiratory symptoms among swimmers in different activity groups and then second, to study the pulmonary function findings and related medications in competitive swimmers who exercise in swimming hall environments the most. Methods First, 1118 participants consisting of 133 competitive-, 734 fitness- and 251 occasional swimmers answered questionnaires concerning their me…

AllergySports medicineAllergyCHILDRENallergiaPulmonary function testingRESPONSIVENESS0302 clinical medicineastmaOrthopedics and Sports MedicineRespiratory symptomsRespiratory systemswimmingSwimming hallsmedicine.diagnostic_testRehabilitationpulmonary functionrespiratory symptomsuimahallitLUNG-FUNCTIONhengityselinten tauditHEALTHRC1200-1245Spirometrymedicine.medical_specialtyPulmonary functionPhysical Therapy Sports Therapy and RehabilitationSpirometry testing03 medical and health scienceshengityselimetBENEFITSmedicinekeuhkosairaudetEXPOSUREkeuhkotSwimmingAsthmabusiness.industryINDUCED BRONCHOCONSTRICTIONResearchuimarit030229 sport sciencesAirway obstructionasthmahengitystietmedicine.diseaseallergyAsthmalääkkeetPOOL ATTENDANCE030228 respiratory systemswimming halls3121 General medicine internal medicine and other clinical medicineuintiSports medicinePhysical therapylääkehoitobusinessBMC Sports Science, Medicine and Rehabilitation
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Pentacyanopropenide group as ligand in organometallic chemistry. Crystal structure and electrochemical studies of (Et4N)[W(CO)5{(C(CN)2C(CN)C(CN)2}]

1999

Abstract The title complex has been obtained by reaction of the tetraethylammonium pentacyanopropenide with tungsten hexacarbonyl in acetone. Its crystal structure involves discrete [W(CO)5{C3(CN)5}]− anions in which the organic fragment is N-coordinated via one of the nitrogen atoms of a cyano group borne by one of the terminal carbon atoms of the allylic skeleton. The anion presents a distorted octahedral coordination with a W–N bond length [2.168(5) A] considerably longer than the W–C bond lengths [cis-W–C in the range 1.998(7)–2.068(4) A; trans-W–C 1.962(7) A]. Cyclic voltammograms of this complex, recorded in CH2Cl2 and CH3CN (Bu4NPF6 0.1 M), display a quasi-reversible reduction and ir…

Allylic rearrangementTungsten hexacarbonylLigandMetal carbonylCrystal structurePhotochemistryInorganic ChemistryBond lengthchemistry.chemical_compoundCrystallographychemistryOctahedronMaterials ChemistryPhysical and Theoretical ChemistryOrganometallic chemistryPolyhedron
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1983-1985. Sagunto y la batalla de Altos Hornos del Mediterráneo (AHM). 430 días de conflicto por la reconversión industrial.

2014

El conflicto más grave de la etapa provisional de la Generalitat provisional y la Iª legislatura socialista en la recién estrenada autonomía vendría marcado por la Reconversión Siderúrgica Integral que decretaba el Ministerio de Industria Energía, y que afectaba a Altos Hornos del Mediterráneo (AHM), empresa situada en Sagunto y que incidía económica y socialmente en toda la comarca valenciana del Camp de Morvedre, y en el sector industrial de la Comunidad valenciana. El conflicto lo heredaba el PSOE, al no haberlo solucionado UCD durante sus años de gobierno. No era un conflicto reciente, sino que se arrastraba desde los años setenta, si bien le explotó con toda virulencia al recién creado…

Altos Hornos del Mediterráneo (AHM)Reconversión Siderúrgica Integralla batalla de AHMGeneralitat Valenciana:CIENCIA POLÍTICA [UNESCO]UNESCO::HISTORIAUNESCO::CIENCIA POLÍTICAUNESCO::SOCIOLOGÍAUNESCO::CIENCIAS ECONÓMICAS:SOCIOLOGÍA [UNESCO]:HISTORIA [UNESCO]:CIENCIAS ECONÓMICAS [UNESCO]
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A rietveld study of the cation substitution between uvarovite and yttrium-aluminum synthetic garnets, obtained by sol-gel method

1994

A series of synthetic garnets solid solutions with compositions between Y 3 Al 2 Al 3 O 12 (Y-Al garnet) (YAG) and Ca 3 Cr 2 Si 3 O 12 (uvarovite) was synthesized using the sol-gel method. The expected general formula is (Ca x Y 1-x ) 3 (Cr x Al 1-x ) 2 (Si x Al 1-x ) 3 O 12 where x=0 to x=1. The cation distribution in dodecahedral, octahedral and tetrahedral sites and bond distances in these synthetic garnets were determined using the Rietveld method. It shows the incomplete substitution in small sites. The smaller site the smaller substitution there is

Aluminium oxidesInorganic chemistrychemistry.chemical_elementGeneral ChemistryYttriumCrystal structureCondensed Matter PhysicsCrystallographyDodecahedronchemistryOctahedronUvaroviteGeneral Materials ScienceSol-gelSolid solutionCrystal Research and Technology
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