A5006953390- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Hydrocarbon exploration and reservoir analysis
- Gas Dynamics and Kinetic Theory
- High-pressure geophysics and materials
- Archaeology and Natural History
- Geological Modeling and Analysis
- Geological Studies and Exploration
- Spectroscopy and Laser Applications
- Hydraulic Fracturing and Reservoir Analysis
- Cultural Heritage Materials Analysis
- Archaeology and ancient environmental studies
- Mineralogy and Gemology Studies
- Reservoir Engineering and Simulation Methods
- Advanced Thermodynamics and Statistical Mechanics
- Plasma Diagnostics and Applications
- Geological formations and processes
- Oil and Gas Production Techniques
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Orthopaedic implants and arthroplasty
- Drilling and Well Engineering
- Bone fractures and treatments
University of Arizona
2011-2024
Escuela Superior Politecnica del Litoral
2023
Fort Lewis College
2004-2022
Halliburton (United Kingdom)
2022
Metropolitan State University of Denver
2021
University of Northern Colorado
2021
Regis University
2021
Colorado State University
2021
Adams State University
2021
Western Colorado University
2021
Abstract Bioelectronic interfaces have been extensively investigated in recent years and advances technology derived from these tools, such as soft ultrathin sensors, now offer the opportunity to interface with parts of body that were largely unexplored due lack suitable tools. The musculoskeletal system is an understudied area where new technologies can result advanced capabilities. Bones a sensor stimulation location tremendous advantages for chronic biointerfaces because devices be...
Current surgical treatments for segmental bone loss do not reliably result in healing, typically necessitate multiple surgeries, and may amputation. Although we have demonstrated that polybutylene terephthalate (PBT) scaffolds can regenerate large critical size defects, the material is non-resorbable lead to problems including acting as a nidus infection. New strategies emerged use resorbable polymers, ceramics, composite materials produce patient specific stimulate rapid formation without...
The syn-extensional Miocene Mt. Perkins pluton, northwestern Arizona, cooled rapidly due to its small size ($$6 km^{2}$$) and shallow emplacement (7.5 km) allows examination of commingled rocks that experienced little isotopic exchange. Within the quartz dioritic granodioritic host ($$56-58 wt \% SiO_{2}$$) enclose enclaves ($$50-55 a portion contains enclave-free granodiorite ($$70-74 SiO_{2}$$). Fine-grained, crenulate enclave margins lack advanced mixing structures (e.g., schlieren, flow...
This paper is a response to the preceding Comment by Klapdor-Kleingrothaus, Dietz, and Krivosheina. The criticisms are confronted, questions raised answered. We demonstrate that lower limit quoted IGEX, , correct there was no ``arithmetical error'' as claimed in ``Critical View'' article.
Cretaceous through Eocene strata of the Four Corners region provide an excellent record changes in sediment provenance from Sevier thin-skinned thrusting formation Laramide block uplifts and intra-foreland basins. During ca. 125–50 Ma timespan, San Juan Basin was flanked by thrust belt to west, Mogollon highlands rift shoulder southwest, influenced (ca. 75–50 Ma) tectonism, ultimately preserving a >6000 ft (>2000 m) sequence continental, marginal-marine, offshore marine sediments. In order...
New U-Pb zircon and 40Ar/39Ar crystallization ages for latest Mesozoic to Cenozoic plutonic rocks in the western San Juan Mountains provide insight into timing interplay of mantle crustal magmatism over past 80 Ma. Subduction-driven Laramide (75-60 Ma) generated alkalic intermediate mafic magmas. These were emplaced as laccoliths stocks along northeast trends that likely controlled by crustal-scale zones weakness with Proterozoic ancestry. The transition from subduction slab rollback...
No current clinical treatments provide an ideal long-term solution for repair of long bone segment defects. Incomplete healing prevents patients from returning to preinjury activity and ultimately requires additional surgery induce healing. Obtaining autologous graft material is costly, incurs morbidity, surgical time, quality finite. In this pilot study, 3D printed biomimetic scaffolds were used facilitate rapid bridging in critical sized defects a sheep model. An inverse trabecular pattern...
Most climate change mitigation scenarios rely on the incremental use of biomass as energy feedstock. Therefore, increasing share alternative sustainable sources is crucial to provide both peak and base electricity loads in future scenarios. The bioenergy potential Ecuador has been addressed for agricultural by-products but not dedicated crops. Agricultural zoning studies have developed food crops Currently, produced (1.4%) comes mainly from sugar cane bagasse production. This study aims...
Small, lightweight, low power solid state and semiconductor lasers are enabling the development of a new class thruster systems for micro- nanosatellites. These devices generate thrust by laser ablation propellant using on-board permit small satellites to perform maneuvers such as orbit maintenance, precision pointing, formation flying. In this work we present concept micropropulsion called microchip (MLT) that is based on passively Q-switched Nd:YAG laser. The enables sub-ns, high peak...
We consider relatively simple expressions for inelastic state-to-state and state-specific dissociative rate coefficients use in vibrational master equation studies of shock-heated CO, N2, O2 highly dilute Ar. Rotationally averaged are determined using information theory. computed an expression we developed earlier refined this work. The is linearized by neglecting diatom-diatom collisions recombination. This allows us to efficient eigenvector-eigenvalue matrix techniques. show that the...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA simple model for state-specific diatomic dissociationDavid A. Gonzales and Philip L. VargheseCite this: J. Phys. Chem. 1993, 97, 29, 7612–7622Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published inissue 1 July 1993https://pubs.acs.org/doi/10.1021/j100131a034https://doi.org/10.1021/j100131a034research-articleACS PublicationsRequest reuse permissionsArticle Views79Altmetric-Citations23LEARN ABOUT THESE...
Small masses of intraplate mafic plutonic and volcanic rocks are exposed in the Navajo field (26–24 Ma), Dulce dike swarm (25–20 western San Juan Mountains (7–0.6 Ma) along eastern boundary Colorado Plateau. Geochemical Sr-Nd isotopic data for these were employed to assess time-space variations melt compositions investigate contributions from different mantle crustal sources during magma production.
We recast a standard igneous petrology course at Fort Lewis College into field-based, inquiry-driven research focused on specific field area, in this case the Tertiary volcanic complex Ship Rock, Navajo Nation, New Mexico. The main goal was to allow undergraduate students an opportunity use work investigate advanced topics while engaging scientific and developing important skills that are needed for all careers science. Constructing projects around class enabled learn science by doing it,...
Context. In 2003, the Sun and Earth passed through both equatorial plane of Jupiter therefore orbital planes its main satellites.
Mesoproterozoic deformation and biomodal magmatism in southwest Colorado offer important insight into the nature tectonic regime of 1.4 Ga western United States. We document syncontractional emplacement coeval gabbroic granitic plutons middle crust at ~1435 Ma Needle Mountains. This is incompatible with extension-dominated "anorogenic" models proposed for generation plutonic rocks Southwest but lends further support synkinematic intracontinental response to regional strains created by...
In this work we propose a pulsed microchip laser thruster (MLT) concept for secondary propulsion on microand nanosatellites. Thrust is developed by laser-induced ablation of solid propellant targets. At the heart MLT an on-board that, when pumped cw diode laser, emits IR radiation at sub-nanosecond pulse widths, high peak powers and repetition rate. Two configurations are proposed, differing primarily their feed mechanisms. A first-order analysis predicts mass (including power conditioning)...
Objectives: Current treatments for focal cartilage defects include osteochondral allograft transplants—a common treatment large and revisions of previously autografted joints. Allografts with weak osseous regions are usable, since bone remodeling replaces inferior quality bone. However, poor chondral surfaces on grafts preclude their use, leading to grafting material shortages. Endogenous adult stem cells can make hyaline-like tissue scaffolds. To increase the number usable allografts,...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew phase of oxygen at high pressure and low temperatureW. B. Carter, David Schiferl, M.L. Lowe, D. GonzalesCite this: J. Phys. Chem. 1991, 95, 6, 2516–2519Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 March 1991https://pubs.acs.org/doi/10.1021/j100159a075https://doi.org/10.1021/j100159a075research-articleACS PublicationsRequest reuse permissionsArticle Views74Altmetric-Citations9LEARN ABOUT...