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.
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Showing 1 to 20 of 1101 for “"radiative"”.
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Radiative Transitions in Charmonium
In this thesis, we analyse radiative transitions in charmonium using Lattice QCD, to provide insight into the internal structure and photocoupling of charmonium states. Distillation is used to allow the efficient computation of a high number of correlation functions, leading to the construction of …
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Radiative transfer of ultrasound
Radiative transfer theory is used to model the multiple scattering of diffuse ultrasonic waves in two types of random media. The first type is an isotropic, homogeneous medium containing randomly oriented, randomly located scatterers. The scatterers are assumed to be uncorrelated. This assumption …
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Unstable radiative-dynamical interactions
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1988.
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Radiative Laminar Boundary Layer Flow
Made available in DSpace on 2014-12-10T23:36:42Z (GMT). No. of bitstreams: 1 7114699.pdf: 2151244 bytes, checksum: bdfb418c68ea4906fab91099a73491ac (MD5) Previous issue date: 1970
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Radiative Corrections to Low Energy Theorems
… a model-independent way, the soft virtual photon radiative corrections to an arbitrary hadronic process. It is shown that all the results concerning infrared divergences obtained within the theory of quantum electrodynamics of the electron-photon system are, in fact, exact in strong interactions. …
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Radiative properties of silicon related materials
The objective of this thesis is to study the optical properties of silicon, as a function of temperature, in the infrared range of wavelengths. The wavelength range, considered in this study, is between 1 micron and 20 microns. The temperature range observed is from 50 degrees Celsius to 1000 …
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Finite kinematics in radiative energy loss
… in the framework of a scalar model of radiative emissions. We find that the small-x kinematic constraints in the simpler theory are identical to those implemented in sophisticated QCD-based energy loss models, but that the exact large-x kinematics in the toy theory are more complicated …
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Radiative muon capture on nuclear targets
… pair spectrometer to detect photons from the radiative muon capture (RMC) process was built. The spectrometer was used to measure the RMC branching ratio for AI, Si, Ca, Mo, Sn and Pb. Two recent theoretical models were used to extract the RMC branching ratio in Ca. The experin1ental result is …
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Non-Radiative Calibration of Active Antenna Arrays
Antenna arrays offer significant benefits for modern wireless communication systems but they remain difficult and expensive to produce. One of the impediments of utilising them is to maintain knowledge of the precise amplitude and phase relationships between the elements of the array, which are …
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Modeling non-radiative processes in solar materials
… The second chapter examines how to predict the radiative and non-radiative decay rates of a large family of naphthalene derivatives. Naphthalene is a common building block in many organic electronic devices and possesses complex photophysics that are difficult to capture. Principally using …
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Land-atmosphere interaction and radiative-convective equilibrium
… related to land-atmosphere interaction and radiative-convective equilibrium: the first two research chapters invoke ideas related to land-atmosphere interaction to better understand radiative-convective equilibrium; the last two research chapters use the framework of radiative-convective …
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Efficient radiative transfer computations in the atmosphere
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1981.
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Quantum-Mechanical Approach to Collision-Induced Radiative Emissions
… process. This phenomenon of collision-induced radiative emissions is of great interest in astrophysics and experimental x-ray spectroscopy research since it helps understand the production of x-rays in astrophysical settings. On the theoretical side, obtaining a description of these radiative …
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Design, fabrication, and application of daytime radiative cooling
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Emission properties of radiative chiral nematic liquid crystals
In this work, we calculate the density of photon states (DOS) of the normal modes in dye-doped chiral nematic liquid crystal (LC) cells in the presence of various loss mechanisms. Losses and gain are incorporated into the transmission characteristics through the introduction of a small imaginary …
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Physical and radiative properties of coated nanoparticle aggregates
… encapsulated in droplets. The resulting direct radiative forcing is computed in a global model, yielding an average value of 0.18 W/m2 , lower than scenarios with uniformly coated BC aggregates or coated spheres. Additionally, the morphology of coated BC affects its atmospheric removal, with dry …
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Spheroidization of iron powders by radiative heat transfer
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.
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Radiative-diffusive models of the Arctic boundary layer
Thesis. 1975. Sc.D.--Massachusetts Institute of Technology. Dept. of Meteorology.
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