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 194 for “"energy level"”.
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Energy level structure of atoms in magnetic fields
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1991.
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Energy level engineering in colloidal quantum dot solar cells
… In this thesis we demonstrate how control of the energy level profile within PbS QD solar cells can be used to understand and improve their operation. First, we demonstrate that improvements in power conversion efficiency may be attained for ZnO / PbS QD heterojunction photovoltaics through the …
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Energy level statistics and Lyapunov exponent in the stadium billiard
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Charge polarisation and excited state energy level structure of silicon isolated double quantum dots
… proposed, supported by simulation. The charging energy level spacing of multiple IDQDs is quantified. The dependence of the IDQD energy level separation on the device dimensions is demonstrated experimentally, in agreement with simulation, through successful fabrication of 5 devices on the same …
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Influence of energy level during gestation on the postpartum endocrine system in the mare
… 100 and 120% of the recommended digestible energy (DE) (NRC, 1978), respectively, for the last 90 d of gestation. During the first 30 d of lactation, all mares were fed the NRC (1978) recommendations for lactation. The 120% DE-fed mares had an advantage of .18 kg (P<. 03) ADG during the last …
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The Effects of Energy Level and Monensin on Reproductive Performance and Lactation in Beef Females
… study was conducted to evaluate the effects of energy intake and monensin on reproductive performance and lactation in beef females.
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Effect of Breed or Crossbreed Combination and Energy Level on Feedlot and Carcass Merit of Steers
Made available in DSpace on 2014-12-10T22:30:30Z (GMT). No. of bitstreams: 1 7500317.pdf: 2206619 bytes, checksum: d31dc9b7d3cc9968f3bae1be31ae4194 (MD5) Previous issue date: 1974
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Energy Level Alignment in Hybrid Bulk Heterojunctions and New Redox Mediators for Quantum Dot Solar Cells
… with lowest unoccupied molecular orbital levels higher in energy than the conduction band of TiO2 for thermodynamically favorable electron transfer. Currently, the energy level values used to guide solar cell design are referenced from the separated materials, neglecting the fact that upon …
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Optimization of dietary protein to energy level for commercial emu (Dromaius novaehollandiae) production to maximize fat yield
… to study the optimum dietary protein and energy ratio of finishing diets to sub-adult emu birds for greater fat accretion. The research was done at African Emu Ranch in Muldersdrift, Gauteng. Twenty-six, four to five months old emu birds were reared to an average target weight of 30.72kg …
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Effects of Breed-Type, Dietary Energy Level, Stilbestrol, and Slaughter Weight on Performance and Carcass Composition of Steers
Made available in DSpace on 2014-12-09T14:28:50Z (GMT). No. of bitstreams: 1 6511823.pdf: 5367432 bytes, checksum: cdd7bd115913e599db2929f8247a3e92 (MD5) Previous issue date: 1965
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Coherent two photon excitation within an extended cloud of Rubidium 85 for the purposes of atomic interferometry and cooling
… only feasible for a handful atoms with simple energy level structures. More exotic energy level structures, such as those found in molecules, are notoriously difficult to cool. Coherent cooling schemes in comparison, offer advantages such as insensitivity to frequency detuning or a higher …
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Coherent excitation of ultracold atoms between ground and Rydberg states
… electrometry; the electric field induced Rydberg energy level shift scales with the seventh power of the principle quantum number. Electromagnetically induced transparency (EIT) is used to map Rydberg energy level shifts onto a ground state transition. EIT in a thermal vapour cell also provides a …
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Fracture properties analysis of rotationally moulded plastics for their application in skin-foam-skin sandwich structure
… properties of this structure from 20 J to 100 J energy level with a drop weight impact testing machine. PE is used for both in skin and core layer and sandwich samples are manufactured at four different skin-core thickness combinations. Impact force resistance and bending stiffness are found to …
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Interfacial Electronic Structure of Dipolar Vanadyl Naphthalocyanine Thin Films
… is shown in this work that molecular electronic levels in both the ground and excited state manifolds can shift independently of the vacuum level. Further, electron transfer between close lying electron donor and acceptor energy levels may be influenced by energy level shifts caused by …
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Comparative study of zinc bis-quinolates and lithium mono-quinolates: Investigation of the effect of coordination geometry on electroluminescence performance
… as the emitter layer or host material the energy level-alignment affecting charge injection efficiency and charge mobility properties are of equal importance. Substitution of the 8-quinolinolato ligand or substitution of different metal ions has been shown to shift absorption and emission …
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Optical properties of GaAs coupled quantum wells and superlattices: electric and magnetic field effects
… wells studied. This is interpreted in terms of energy level anti-crossing and switching between intrawell and interwell transitions. The presence of an additional magnetic field, oriented parallel to the plane of the quantum well layers, shifts the electric field at which energy level …
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Brillouin scattering induced transparency and generation of slow and fast light
… is forbidden to cause an excitation from one energy level to another through coherent coupling with a third, intermediate energy level that creates an interference pathway. In this study, Brillouin scattering analogue of EIT is demonstrated using the two optical modes that are coupled through …
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Evaluation of the performance of coherent optical communications commercial DSP ASICs in low earth orbit radiation environments
… simulations are used to calculate the proton energy levels entering the silicon active region of the CL2001OA1 and to determine the proton energy level sufficient for depositing ionizing dose in the active region and penetrating through the active region. The simulations determine the lower …
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Effects of microstructure and strain ageing on toughness of nuclear PWR reactor weld metals
… on the transition region and upper-shelf impact energy level. Prestraining and ageing the specimens promoted an increase in the ductile-to-brittle transition temperature and reduction the upper shelf energy level for both microstructures. The extremes of behaviour were defined by the reheated …
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