Malte Müller - Böcker
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2 produkter
2 produkter
Enhancing Energy Efficiency in Irrigation
A Socio-Technical Approach in South India
Häftad, Engelska, 2015
534 kr
Skickas inom 10-15 vardagar
This SpringerBrief reviews currently applied and potential solutions for improving the efficiency and quality of rural electricity supply in India, a major bottleneck for agricultural development. It provides background on the current state of supply and reviews recent and ongoing research and development projects. One selected project, designed and conducted by the authors, is outlined in detail. The research findings, project implementation, and evaluation are intended to provide development practitioners, policy makers, and applied researchers with experience from the field. At the core of this Brief is the integration of technical and social solutions, emphasizing the role of collective action, and the merits and demerits of small-scale, technically simple measures.
Del 14 - Hamburg Studies on Maritime Affairs
Large Spectrum of Free Oscillations of the World Ocean Including the Full Ocean Loading and Self-attraction Effects
Häftad, Engelska, 2008
492 kr
Skickas inom 10-15 vardagar
ThisbookdependsonadissertationpreparedattheDepartementofGeosciencesat theUniversityHamburg. ItwasacceptedbytheDepartementwiththegradesumma cumlaudein2008. IwouldliketothankmyacademicadvisorProf. Dr. WilfriedZahelforhisconstant supportandforthelongandconstructivediscussions. Further,IwouldliketothankProf. Dr. Jur .. genSundermann .. forintroducingmeto theInternationalMaxPlanckResearchSchool. TheInternationalMaxPlanckResearchSchoolforMaritimeAffairsandinparticu larProf. Dr. Dr. h. c. Jur .. genBasedowandhisco directorsarethankedforgivingme theopportunitytoperformthisstudyinHamburg. IacknowledgethecomputationalsupportoftheDKRZandNEC,especiallythe helpfulcommentsofKlausKetelsenandJens OlafBeismann. LastbutnotleastmanythankstomywifeJanaSillmannandmysonDariusfor givingmethetimeIneededforthisstudyandprovidingajoyfulandlovinghome. ThisworkhasbeenfundedbytheInternationalMaxPlanckResearchSchoolfor MaritimeAffairsattheUniversityHamburg. Hamburg,August2008 MalteMuller .. Contents Abstract...1 1 Introduction...3 2 TheoryandModel ...7 2. 1 Theory ...7 2. 1. 1 SecondaryForces:TheLoadingandSelf AttractionEffect . 8 2. 1. 2 TheEquationsofMotionandtheEquationofContinuity...11 2. 1. 3 EnergyBalance...14 2. 1. 4 ParameterizationoftheLSA AnAnalyticalApproach ...16 2. 2 Model...18 2. 2. 1 TheImplicitlyRestartedArnoldiMethod...19 2. 2. 2 TheParallelizationwithMPI ...21 2. 2. 3 ThePerformanceoftheModel...21 3 TheFreeOscillations...23 3. 1 GravitationalModes...23 3. 1. 1 The? value...24 3. 1. 2 TheIn?uenceoftheLSA ...25 3. 1. 3 TheAntarcticKelvinWave...30 3. 1. 4 NewModes...30 3. 1. 5 TheSlowestModes ...31 3. 2 VorticityModes...32 3. 2. 1 TopographicalVorticityModes...32 3. 2. 2 PlanetaryVorticityModes...34 4 SynthesisofForcedOscillations...39 4. 1 TidalDynamicsandtheIn?uenceofLSA...40 4. 1. 1 TheProcedureofTidalSynthesis...40 4. 1. 2 LSA effectonForcedOscillations...45 4. 1. 3 TheSynthesisoftheSemidiurnalandDiurnalTides...50 xi xii Contents 4. 2 IntegrationoftheSolutionsofaTidalModelwithAssimilationof Data...55 4. 2. 1 NewExpansionCoef?cients...55 4. 2. 2 NewFrequenciesandAdjointEigenfunctions ...59 4. 2. 3 Results...61 4. 2. 4 Summary...70 4. 2. 5 Discussion...71 5 Conclusion ...73 Figures...75 Tables...101 Appendix...105 ListofSymbols ...109 References...113 Index ...117 Abstract AnewsetofbarotropicfreeoscillationsoftheWorldOceaniscomputedwithex plicitconsiderationofdissipativetermsandthefulloceanloadingandself attraction effect(LSA). Thissetcontainsfreeoscillationsthatdidnotappearinthespectraof previousstudies. Furthermore,theexpansiontowardslongerperiods(165hours) yieldsnewglobalplanetarymodes. Altogether169freeoscillationsarecomputed withperiodslongerthan7. 7hours. Ofthese,71aregravitationalmodes,92areto pographicallycontrolledvorticitymodes,and6areplanetaryvorticitymodes. The in?uenceoftheLSAisinvestigatedforallthreekindsofmodeswithrespectto changesintheperiodsandinthespatialstructureoftheseasurfaceelevationand thehorizontalmasstransports. Inparticular,formodesinthesemi diurnalanddi urnalperiodrange,theparameterizationoftheLSAisanalyzed. Forthefreeoscillationsintheperiodrangefrom9to40hoursthecorresponding adjointsolutionsarecomputedandusedtosynthesizesemidiurnalanddiurnaltides ofseconddegree. Sincethesefreeoscillationsaredeterminedwithandwithoutcon siderationofthefullLSA effect,thisstudyallowsforadetailedanalysisoftheLSA onthedynamicsofoceantides,e. g. anphysicalexplanationisgivenfortheinduced phasedelaycomputedbyoceantidemodels.Further,thesynthesisgivesaspectral compositionofcertainwellknowntidalfeaturesandpairsoffreeoscillationsare identi?ed,diminishingtheircontributioneitheronaglobalorlocalscale. Further,semidiurnalanddiurnaltidalsolutionsofatidalmodelwithassimilation ofdataareintegratedintheprocedureofsynthesizingtides.