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Dissertations / Theses on the topic 'Surface mode oscillations'

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1

Cleve, Sarah. "Microstreaming induced in the vicinity of an acoustically excited, nonspherically oscillating microbubble." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEC028/document.

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Des bulles micrométriques sont utilisées dans divers domaines, notamment dans des applications médicales basées sur les ultrasons. Il est possible d’exploiter différents effets des bulles, comme par exemple leur résonance acoustique ou leur effet destructeur en cavitation inertielle. Un autre mécanisme exploitable est la génération de micro-écoulements, appelé microstreaming, induits autour d’une bulle. Ces écoulements sont relativement lents par rapport aux oscillations rapides de la bulle. Le microstreaming et les contraintes de cisaillement associées jouent un rôle important dans la perméab
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2

Chen, Chia-Jeng. "Hydro-climatic forecasting using sea surface temperatures." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/48974.

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A key determinant of atmospheric circulation patterns and regional climatic conditions is sea surface temperature (SST). This has been the motivation for the development of various teleconnection methods aiming to forecast hydro-climatic variables. Among such methods are linear projections based on teleconnection gross indices (such as the ENSO, IOD, and NAO) or leading empirical orthogonal functions (EOFs). However, these methods deteriorate drastically if the predefined indices or EOFs cannot account for climatic variability in the region of interest. This study introduces a new hydro-climat
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3

Achlan, Moustafa. "Surface Plasmon Polariton and Wave Guide Modes in a Six Layer Thin Film Stack." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS109.

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Dans cette thèse, nous étudions les propriétés optiques d'un système multicouche (air-Au-SiO₂-Au-Ti-verre). Les interfaces sont planes et la modélisation est réalisée en utilisant les coefficients de Fresnel à l'interface et la propagation d'ondes planes dans les couches. Deux modèles sont utilisés où l'échantillon est : i) excité par une source à l'infini ; ii) excité par une source locale. Dans l'expérience que nous avons modélisée l'empilement est excité par les électrons tunnel inélastiques dans un microscope à effet tunnel (STM). Dans le modèle, le courant tunnel inélastique est remplacé
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4

Chen, Lihui. "Synthesis and Plasmonic Properties of Copper-based Nanocrystals." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/217134.

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5

Maliniemi, V. (Ville). "Observations of solar wind related climate effects in the Northern Hemisphere winter." Doctoral thesis, University of Oulu, 2016. http://urn.fi/urn:isbn:9789526213545.

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Abstract This thesis studies the long-term relation between the solar wind driven energetic particle forcing into the atmosphere and the tropospheric circulation in the Northern Hemisphere winter. The work covers the period of more than one hundred years since the turn of the 20th century to present. The thesis makes a statistical analysis of satellite measurements of precipitating energetic electrons, sunspot number data and geomagnetic activity, and compares them with temperature and pressure measurements made at the Earth's surface. Recent results, both observational and from chemistry clim
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6

Awo, Founi Mesmin. "Modes interannnuels de la variabilité climatique de l'Atlantique tropical, dynamiques oscillatoires et signatures en salinité de surface de la mer." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30171/document.

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Dans cette thèse, nous avons abordé plusieurs thématiques liées aux modes de variabilité climatique dans l'Atlantique tropical à l'échelle interannuelle. Les analyses statistiques nous ont permis dans un premier temps de mettre en évidence les deux principaux modes dominants de cette variabilité interannuelle: un mode équatorial et un mode méridien. Le mode équatorial est responsable d'anomalies de température de surface de la mer (SST) principalement dans le Golfe de Guinée et est identifié par des variations de la pente du niveau de la mer dans la bande équatoriale. Il est dû à des rétroacti
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7

Ayina, Ludos-Hervé. "Etude des modes de variabilité de l'océan Atlantique tropical et de leur sensibilité à l'impact des décharges fluviatiles et des précipitations." Paris 6, 2002. http://www.theses.fr/2002PA066019.

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8

Thakore, Vaibhav. "Nonlinear dynamic modeling, simulation and characterization of the mesoscale neuron-electrode interface." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5529.

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Extracellular neuroelectronic interfacing has important applications in the fields of neural prosthetics, biological computation and whole-cell biosensing for drug screening and toxin detection. While the field of neuroelectronic interfacing holds great promise, the recording of high-fidelity signals from extracellular devices has long suffered from the problem of low signal-to-noise ratios and changes in signal shapes due to the presence of highly dispersive dielectric medium in the neuron-microelectrode cleft. This has made it difficult to correlate the extracellularly recorded signals with
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9

Rath, Pranaya Kishore. "Experimental Investigation of Electrons In and Above Liquid Helium." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/5838.

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Electrons on the surface of liquid helium form a nearly ideal 2-dimensional electron system (2DES). An electron density up to 2 × 10^9 cm-2, known as the critical electron density, can be achieved on the liquid helium surface, above which an electro-hydrodynamic (EHD) instability sets in, which results in the formation of MEBs. Due to this limitation in maximum possible density, only the classical liquid and solid phases of the 2DES can be accessed in this system. But at the same time, on the surface of thin liquid helium film and with the multi-electron bubbles (MEBs), it may be possible to
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10

Das, Surajit. "Role Of Sea Surface Temperature Gradient In Intraseasonal Oscillation Of Convection In An Aquaplanet Model." Thesis, 2012. https://etd.iisc.ac.in/handle/2005/2583.

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In this thesis we examine intra-seasonal oscillations (ISO) in the aqua-planet setup of the Community Atmospheric Model (CAM) version 5.1, mainly based on July and January climatological sea surface temperature (SST). We investigate mainly two questions -what should be the SST distribution for the existence of (a) northward moving ISO in summer, and (b) eastward moving MJO-like modes in winter. In the first part of the thesis we discuss the northward propagation. A series of experiments were performed with zonally symmetric and asymmetric SST distributions. The basic lower boundary condition i
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11

Das, Surajit. "Role Of Sea Surface Temperature Gradient In Intraseasonal Oscillation Of Convection In An Aquaplanet Model." Thesis, 2012. http://etd.iisc.ernet.in/handle/2005/2583.

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In this thesis we examine intra-seasonal oscillations (ISO) in the aqua-planet setup of the Community Atmospheric Model (CAM) version 5.1, mainly based on July and January climatological sea surface temperature (SST). We investigate mainly two questions -what should be the SST distribution for the existence of (a) northward moving ISO in summer, and (b) eastward moving MJO-like modes in winter. In the first part of the thesis we discuss the northward propagation. A series of experiments were performed with zonally symmetric and asymmetric SST distributions. The basic lower boundary condition i
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12

Lin, Tzong-Shyan, and 林宗賢. "Surface Plasmon Excitation, Mode Splitting in Slab Wave Guides and Dynamic Oscillation Studies of Liquid Crystals." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/52149969599929734277.

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博士<br>國立清華大學<br>物理學系<br>90<br>In this work, we are devoted to study the optical properties of nematic liquid crystal (LC) from the anisotropic birefringence behavior view. These include the shift of minimum attenuated total reflection angle, the mode splitting, and the nonlinear dynamic oscillation. The scenario of this work will be portrayed as follows. Attenuated total reflection (ATR) is a prominent effect in examining the excitation of surface plasmons. The Kretcshmann-Raether configuration is implemented to generate the surface plasmon and to examine the change of the refractiv
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13

Royon-Lebeaud, Aude. "Ballottement des liquides dans les réservoirs cylindriques soumis à une oscillation harmonique: régimes d'onde non-linéaire et brisure." Phd thesis, 2005. http://tel.archives-ouvertes.fr/tel-00009117.

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Nous considèrons le ballottement des liquides dans les réservoirs cylindriques pour de forts taux de remplissage. Le système est soumis à une oscillation rectiligne horizontale et périodique de basse fréquence. Des visualisations ainsi que des mesures temporelles de la position de la surface libre par sonde capacitive ont permis de détailler les mouvements d'ondes ainsi que la déstabilisation du front. Trois régimes sont mis en évidence : un mode plan antisymétrique, un régime chaotique et un mode tournant. Le mode forcé est très bien modélisé par un pendule simple amorti. Ce modèle mécanique
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14

Venugopal, Thushara. "Sensitivity of Sea Surface Temperature Intraseasonal Oscillation to Diurnal Atmospheric Forcings in an OGCM." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3347.

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Abstract The diurnal cycle is a dominant mode of sea surface temperature (SST) variability in trop-ical oceans, that influences air-sea interaction and climate processes. Diurnal variability of SST generally ranges from ~0.1 to 2.0◦C and is controlled by atmospheric fluxes of heat and momentum. In the present study, the response of intraseasonal variability (ISV) of SST in the Bay of Bengal (BoB) to diurnal atmospheric forcings, during the summer monsoon of 2007, has been examined using an Ocean General Circulation Model (OGCM). The model is based on the Modular Ocean Model Version 4 (MOM4p0),
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15

Venugopal, Thushara. "Sensitivity of Sea Surface Temperature Intraseasonal Oscillation to Diurnal Atmospheric Forcings in an OGCM." Thesis, 2013. http://etd.iisc.ernet.in/2005/3347.

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Abstract The diurnal cycle is a dominant mode of sea surface temperature (SST) variability in trop-ical oceans, that influences air-sea interaction and climate processes. Diurnal variability of SST generally ranges from ~0.1 to 2.0◦C and is controlled by atmospheric fluxes of heat and momentum. In the present study, the response of intraseasonal variability (ISV) of SST in the Bay of Bengal (BoB) to diurnal atmospheric forcings, during the summer monsoon of 2007, has been examined using an Ocean General Circulation Model (OGCM). The model is based on the Modular Ocean Model Version 4 (MOM4p0),
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16

Bhattacharya, Anwesa. "Role of Aerosols in Modulating the Intraseasonal Oscillations of Indian Summer Monsoon." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/2864.

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In this thesis, we have presented a systematic analysis of the change of cloud properties due to variation in aerosol concentration over Indian region using satellite observations, and Weather Research and Forecasting Model coupled with Chemistry (WRF-Chem) simulations. The Tropical Rainfall Measurement Mission (TRMM) based Microwave Imager (TMI) estimates (2A12) have been used to compare and contrast the characteristics of cloud liquid water and ice over the Indian land region and the surrounding oceans, during the pre-monsoon (May) and monsoon (June–September) seasons. Based on the spatial h
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17

Bhattacharya, Anwesa. "Role of Aerosols in Modulating the Intraseasonal Oscillations of Indian Summer Monsoon." Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2864.

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In this thesis, we have presented a systematic analysis of the change of cloud properties due to variation in aerosol concentration over Indian region using satellite observations, and Weather Research and Forecasting Model coupled with Chemistry (WRF-Chem) simulations. The Tropical Rainfall Measurement Mission (TRMM) based Microwave Imager (TMI) estimates (2A12) have been used to compare and contrast the characteristics of cloud liquid water and ice over the Indian land region and the surrounding oceans, during the pre-monsoon (May) and monsoon (June–September) seasons. Based on the spatial h
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18

Zvejnieks, Guntars. "Catalytic Surface Reactions: Monte Carlo Simulations of Systems with Creation, Annihilation and Diffusion of Interacting Reactants." Doctoral thesis, 2001. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2001061912.

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During the last 30 years considerable attention was paid to open systems far from thermal equilibrium. Under certain conditions these dissipative systems show a qualitatively new behavior on macroscopic length scales, which are known as spatiotemporal structures. These new structures arise as a feature of collective behavior of a many-body systems. One particular example of dissipative systems considered in the present Thesis is the systems with reactant birth and death. Such systems arise, e.g., in description of the population growth or the kinetics of chemical reactions. To describe the s
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19

Ghosh, Rohit. "Interannual Variation of Monsoon in a High Resolution AGCM with Climatological SST Forcing." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3350.

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Interannual variation of Indian summer (June-September: JJAS) monsoon rainfall (ISMR) depends on its relative intensity during early (June-July: JJ; contribution 52%) and late (August-September: AS; contribution 49%) phases. Apart from variations in sea surface temperature (SST), the primary reasons behind the variability during JJ and AS can be very different due to change in climatic conditions on account of post-onset processes. Here, using a high resolution general circulation model with seasonally varying climatological SST, mechanisms those govern the intensity of rainfall during JJ and
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20

Ghosh, Rohit. "Interannual Variation of Monsoon in a High Resolution AGCM with Climatological SST Forcing." Thesis, 2013. http://etd.iisc.ernet.in/2005/3350.

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Interannual variation of Indian summer (June-September: JJAS) monsoon rainfall (ISMR) depends on its relative intensity during early (June-July: JJ; contribution 52%) and late (August-September: AS; contribution 49%) phases. Apart from variations in sea surface temperature (SST), the primary reasons behind the variability during JJ and AS can be very different due to change in climatic conditions on account of post-onset processes. Here, using a high resolution general circulation model with seasonally varying climatological SST, mechanisms those govern the intensity of rainfall during JJ and
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21

Koch, Philipp. "Partikelmodellierung der Strukturbildung akustischer Kavitationsblasen in Wechselwirkung mit dem Schalldruckfeld." Doctoral thesis, 2006. http://www.gbv.de/dms/goettingen/524828539.pdf.

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