Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 86 for “"Energy exchange"”.
-
Energy exchange processes in erbium-doped fluoride glasses
… doping levels. Under these circumstances the energy level dynamics can be dominated by non-linear multiple-ion cross relaxation processes.
-
Surface conditions effect on energy exchange at the soil surface
… roughness effects on components of the surface energy balance were examined for a range of roughness conditions. Reflectance of short wave radiation decreased with rougher soil surfaces. Reflectance increased about 25% after the soil surfaces had been smoothed by a 4.7 cm rainfall. Net radiation …
-
Vibrational Energy Exchange in Nitric-Oxide and Carbon-Monoxide Molecules
Made available in DSpace on 2014-12-10T19:07:24Z (GMT). No. of bitstreams: 1 7511695.pdf: 4603486 bytes, checksum: 3c82381c87a1d2b6750542accde3ff7f (MD5) Previous issue date: 1974
-
Electronic structure and electronic-vibrational energy exchange in Rydberg states of calcium monofluoride
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1995.
-
Energy Exchange Processes Through Coulomb Collisions in Gaseous Dischargeplasmas Studied by Microwave Interaction Techniques
Made available in DSpace on 2014-12-04T21:02:58Z (GMT). No. of bitstreams: 1 0025209.pdf: 7006466 bytes, checksum: cb6c27bd66d3a9b84217dc20c5d1af1b (MD5) Previous issue date: 1957
-
Resonant Dipole-Dipole Energy Transfer Dynamics in a Frozen Rydberg Gas
… Rydberg atoms, and is the dominant mechanism for energy exchange among such atoms on microsecond time scales. I present the results of experiments that investigate this interaction using rubidium atoms excited to Rydberg states with an all-diode laser system. In the first of these, high resolution …
-
Studying Particle and Energy Transport using Nuclear and X-ray Diagnostics for Discovery Science and Inertial Confinement Fusion
… a fundamental understanding of particle and energy transport in High Energy Density Plasmas (HEDP) is essential for advancing basic plasma science and for correctly modeling the energy balance and ignition threshold in Inertial Confinement Fusion (ICF) implosions. Particle and energy …
-
Dicke enhanced energy transfer via off resonant coupling y Christopher Black.
This thesis examines the dynamics of energy exchange in a model for second-order (indirect) coupling through off-resonant states. Specifically, the model hosts a second-order transfer of energy between two collections of two level systems via an off-resonant oscillator. No first-order transfer of …
-
Heat Transfer Due to Particle-Wall Collisions in Suspension Flows
… for the analysis. The results showed that the energy exchange due to gas-mediated conduction scales as the gas conductivity, the square of the particle diameter, the temperature difference, and the inverse of the velocity. The results are independent of the Prandtl number and the Peclet number, …
-
Complete electrical study of recombination properties of titanium and zinc deep levels in silicon
"Energy exchange mechanisms of electron and hole recombination at deep level traps in semiconductors are studied. New variations of the capacitance and current transient techniques are developed which overcome two major experimental limitations: (1) capture is too fast, and (2) optical excitation …
-
Applications of game theory in microgrids
… a group of interconnected loads and distributed energy resources within clearly defined electrical boundaries that acts as a single controllable entity with respect to the grid, has been studied extensively in recent years. This paper will explore the application of non-cooperative game and …
-
Raman-based measurements of greenhouse activity of combustion flue gases
… the molecule infrared active, also causes the energy exchange and the corresponding wavelength shift during Raman scattering. In this work, Raman scattering spectrum and infrared emission intensity in CO2-containing atmospheric jets at various temperatures and concentrations were measured. The …
-
Energy pathways and structures of oceanic eddies from the ECCO2 state estimate and simplified models
… The central focus of this dissertation is the energy exchange between eddies and mean flow and banded structures in the low-frequency component of the eddy field. A combination of a realistic eddy-permitting ocean state estimate and simplified theoretical models is used to address the following …
-
Energy pathways and structures of oceanic eddies from the ECCO2 State Estimate and Simplified Models
… The central focus of this dissertation is the energy exchange between eddies and mean ow and banded structures in the low-frequency component of the eddy eld. A combination of a realistic eddy-permitting ocean state estimate and simplied theoretical models is used to address the following speci …
-
Impact of Grid-Following and Grid-Forming DERs on Resilient Operation of Holonic Grid
… thesis investigates how different distributed energy resources (DERs) impact the resilience operation of a holonic grid. The holonic grid consists of two or more connected microgrids and /or provisional microgrids (PMGs). The type of the DER, i.e., grid-forming or grid-following, affects the …
-
Micrometeorological approaches to measure and model surface energy fluxes of irrigated citrus orchards in a semi-arid environment
… theoretical methods for evaluating mass and energy exchange processes within one of the most relevant crop of the agricultural Sicilian context. The study was conceived as a long monitoring program of micrometeorological features of the study orange orchard at different spatial scales (plant, …
-
Thermal pumping of light-emitting diodes
… to as "thermal pumping", results from Peltier energy exchange from the lattice to charge carriers when current is injected into an LED. For an applied voltage V such that qV < (hw), where q is the electron charge and (hw) is the average emitted photon energy, thermal pumping can greatly enhance …
-
Synthesis of electric networks interconnecting PZT actuators to efficiently damp mechanical vibrations
… be shown that it is possible to obtain a quick energy exchange between its mechanical and electrical forms, using available piezoelectric actuators.Finally we will study a numerical simulation for the damping of transverse vibrations of a beam clamped at both ends.
-
Triadic Resonance Instability in finite-width internal gravity wave beams
… literature does not consider the triadic energy exchange to be a function of space, it is unable to predict this oscillatory behaviour. Theoretical modelling is developed to capture the essence of the experimental setup. The model uses numerical solutions of a weakly non-linear system in a …
-
Extraction of turbomachinery loss mechanisms from high-fidelity simulations
… analysis of turbulent structures via the kinetic energy of the unsteady part of their velocity components. Turbulent structures were then extracted from two different three-dimensional compressor test cases of varying complexity: one axial geometry and one shrouded mixed-flow impeller. Exploring …
Page 1 of 5