Browsing Rice University Electronic Theses and Dissertations by Title
Now showing items 1-20 of 13402
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1, 4-Dioxane biodegradation at low temperatures in Arctic groundwater samples
(2010)1,4-Dioxane is an emerging groundwater contaminant and a probable human carcinogen. Its biodegradation was investigated in microcosms prepared with groundwater and soil from an impacted site in Alaska. In addition to natural attenuation conditions (i.e., no amendments), the following treatments were tested: (a) biostimulation by addition of 1-butanol ... -
1. Strain and diamagnetic susceptibility. 2. The mobility of positive ions in flames
(1931)STRAIN AND DIAMAGNETIC SUSCEPTIBILITY --ABSTRACT-- The magnetic susceptibility of copper and, silver wires has been measured by the Gouy method before and after various annealing processes. Also, the susceptibility has been measured before and after straining specimens beyond the elastic limit, the strains being either twists or stretches. The ... -
1.7-mev anomaly in Be_
(1961) -
100-microsecond-resolved exafs technique for studying photolyzed hemoproteins
(1984)This thesis describes a 1-jus-resolved extended x-ray absorption fine structre (EXAFS) technique for studying protein dynamics. Both the time-resolved EXAFS spectrometer and the protein samples are described in detail. About ten years ago synchrotron radiation from electron storage rings began to be used for research in condensed matter. As a result ... -
14-18 MeV total neutron cross sections of hydrogen atom, hydrogen, lithium-7, beryllium-9, boron-10, boron-11, carbon-12, carbon-16, magnesium, aluminum-27, and sulfur-32
(1953)Measurements of total neutron cross sections for nuclei using fast neutrons of various energies have been previously reported. Several of these used neutrons which were not monoenergetic. However, with the advent of monoenergetic neutrons from the reaction T(d,n)He4, investigations have been reported giving total neutron cross sections at 14 Mev using ... -
1D and 2D Methods for Modeling Floodplains under Storm Surge Conditions
(2011)This study evaluates a 1D and a 2D method for analyzing the combined effect of inland rainfall and hurricane-induced storm surge on a coastal floodplain. Horsepen Bayou near Clear Lake, southeast of Houston, Texas is vulnerable to storm surge, which can travel upstream into the Bayou and exacerbate flooding outside the designated floodplain. However, ... -
1T-TaS2 for Nonlinear Applications in Optical Neural Networks
(2020-04-17)Artificial neural networks (ANNs) are a set of algorithms which can realize many different functions, such as patterns recognition, classification and prediction. ANNs has become a well-worthy field of study in multiple industries over the past years. Much effort has been contributed to this area and it turns back with significant values in terms of ... -
1T-TaS₂: A strongly correlated material for tunable nanophotonics
(2019-09-24)Tunable nanophotonics have been demonstrated for several decades and achieved to practical applications in real world in multiple ways such as imaging, sensing, signal processing, information communication and etc. Many different mechanisms have been involved in such modulating, gate tunable Fermi energy of graphene, MEMS devices, chemical reaction. ... -
2,4,6-trinitrotoluene reduction by hydrogenase in Clostridium acetobutylicum
(2003)Unique genetic modifications to C. acetobutylicum altered the level of hydrogenase expression, allowing study of the resulting effects on the 2,4,6-trinitrotoluene (TNT) reduction rates to be possible. A strain designed to over-express the hydrogenase gene resulted in maintained TNT reduction during late growth phases when it is not typically observed. ... -
2D Materials in Lego Style: Synthesis, Characterizations and Applications
(2015-12-04)Recently, the emergence and development of 2D materials with various optical and electrical properties has opened up new routes for electronic and optoelectronic device fabrication based on atomically thin layers. For example, graphene behaves as a semi-metal with extremely high mobility, hexagonal boron nitride (h-BN) is a good insulator and monolayer ... -
2D Optoelectronics: Challenges and Opportunities
(2015-12-17)Indium Selenide (InSe) is one of atomically layered 2D materials attracting broad interests recently, because of its good optoelectronic properties. Based on the challenges of 2D optoelectronics, several topics will be covered in this defense, such as trap states and low absorption rate. InSe is selected as a platform to study these topics. The ... -
2D timelapse and 3D fluorescence microscopy with applications to vascular tissue engineering
(1998)Part of the definition given to the new emerging science discipline of tissue engineering is the understanding of the structure-function relationships at the cellular level. In this context it is important for vascular tissue engineering to understand the mechanisms involved in the vascular cell responses to their mechanically active environment. ... -
3-body breakup of HE_
(1963)The d(p,2p)n reaction has been studied using the recently constructed angular correlation chamber at Rice University. The two protons from the reaction have been observed for incident proton energies of 5.0, 9.0, and 10.5 MeV using the two Rice University Van de Graaff accelerators. Kinematic calculations were made to determine the shape of the curve ... -
3-D segmentation and volume estimation of radiologic images by a novel, feature driven, region growing technique
(1992)Magnetic Resonance (MR) imaging is a 3-D, multi-slice, radiological technique that acquires multiple intensities corresponding to each voxel. The transverse relaxation time, T$\sb1$, and the axial relaxation time, T$\sb2$, are two commonly obtained intensities that tend to be orthogonal. Automated segmentation of 3-D regions is very difficult because ... -
3.4 centimeter cyrogenic parametric amplifier system for radio astronomy
(1970)A low-noise microwave receiver was designed and fabricated to provide the necessary sensitivity to detect the helium 3 line. In order to achieve ultra-low noise amplification in the input states of this receiver, cascaded non-degenerate cryogenically cooled parametric amplifiers were used. These amplifiers were followed by a tunnel diode amplifier ... -
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(2015-04-21)Walls are edges between two distinct entities; urban forms that attempt to express neutrality as infrastructure while firmly rejecting interaction between opposing constituencies. Walls are usually contiguous lines; establishing absolute boundaries and absolute limits. Belfast, Northern Ireland is no stranger to walls. Over 100 currently exist in ... -
3D Modern Reef Morphologies along the Upper Slopes of the Lighthouse Reef (Belize): Potential Archive of Punctuated Sea Level Fluctuations, Using a Global Comparative Basin Analysis Approach
(2020-12-18)In the past 500 ky, Earth has witnessed unprecedented extreme glacial/interglacial cyclic changes in climate that translated into unusually high amplitude sea-level fluctuations. During the most recent glacial to interglacial, or deglacial, transition, sea level rose ~125 m since the Last Glacial Maximum (LGM), or during the last 20 kyr. The Belize ... -
3D optical lattice system for ultra-cold Lithium 6
(2014-04-25)Optical lattice experiments have proved to be a versatile tool for studying strongly correlated quantum systems. The motivation behind these experiments is to use the cold atoms to emulate a solid state system for which the Hamiltonian is analytically or numerically non-solvable. In our experiment, we construct a 3D simple cubic lattice system which ...
