A5102724424- High-pressure geophysics and materials
- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Astro and Planetary Science
- Planetary Science and Exploration
- Seismic Waves and Analysis
- Geophysics and Sensor Technology
- Vibration and Dynamic Analysis
- Structural Response to Dynamic Loads
- Structural Behavior of Reinforced Concrete
- High-Velocity Impact and Material Behavior
- Composite Structure Analysis and Optimization
- Structural Load-Bearing Analysis
- Seismic Performance and Analysis
- Masonry and Concrete Structural Analysis
- Geotechnical Engineering and Underground Structures
- Structural Engineering and Vibration Analysis
- Arctic and Antarctic ice dynamics
- Colorectal Cancer Surgical Treatments
- Methane Hydrates and Related Phenomena
- Structural Analysis of Composite Materials
- Earthquake Detection and Analysis
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Geophysics and Gravity Measurements
McGill University
2010-2024
Indiana Institute of Technology
2024
St Mary's Hospital
2021-2024
University of British Columbia
1988-2020
California Institute of Technology
1983-2014
Winona State University
2012
Research Triangle Park Foundation
2008
GlaxoSmithKline (United States)
2008
University of Kansas Medical Center
2007
Lockheed Martin (United States)
1980
The concept of a relaxation spectrum is used to compute the absorption and dispersion linear anelastic solid. Boltzmann after-effect equation solved for solid having relationship between stress strain their first time derivatives, ‘standard solid’, distribution times. function chosen give nearly constant Q over seismic frequency range. Both discrete continuous spectra are considered. resulting has broad band which can be interpreted in terms superposition peaks individual mechanisms.
For most solids the 'high temperature background' attenuation dominates at low frequencies and temperatures greater than about one-half melting temperature. It is likely to be important in mantle seismic frequencies. The same mechanism also contributes transient creep stresses total strains. A relaxation spectrum found which satisfies frequency dependence of laboratory Q time data. This makes it possible provide a physical interpretation parameters Jeffrey's modified Lomnitz function....
The dislocation microstructure of mantle materials can account simultaneously for long-term steady-state creep, and stress wave attenuation at seismic frequencies. hypothesis that a single microstructural model explains therheology characteristic times ranging from 1 to 1010 seconds be used restrict the class permissible rheological models mantle. W e review dam ping in order increasing complexity, reject those which do not satisfy laboratory data or geophysical constraints. This elimination...
Research Article| December 01, 2005 Large Igneous Provinces, Delamination, and Fertile Mantle Don L. Anderson 1Seismological Laboratory Caltech Pasadena, CA 91125, USA E-mail: dla@gps.caltech.edu Search for other works by this author on: GSW Google Scholar Elements (2005) 1 (5): 271–275. https://doi.org/10.2113/gselements.1.5.271 Article history first online: 09 Mar 2017 Cite View This Citation Add to Manager Share Icon Facebook Twitter LinkedIn MailTo Tools Get Permissions Site Anderson;...
Carbonatites are igneous rocks formed in the crust by fractional crystallization of carbonate-rich parental melts that mostly mantle derived. They dominantly consist carbonate minerals such as calcite, dolomite, and ankerite, well minor ...Read More
Caffeine is a popular ergogenic aid that has plethora of evidence highlighting its positive effects. A Google Scholar search using the keywords "caffeine" and "exercise" yields over 200,000 results, emphasizing extensive research on this topic. However, despite vast amount available data, it intriguing uncertainties persist regarding effectiveness safety caffeine. These include but are not limited to: 1. Does caffeine dehydrate you at rest? 2. during exercise? 3. promote loss body fat? 4....
Elastic properties and their pressure temperature derivatives are commonly measured on polyerystalline sintered aggregates assumed to adequately describe the behavior of an ideal aggregate single crystals without regard strain individual grains. Similarly, it is that by suitably averaging data for crystals, can be calculated. Ultrasonic results MgO 8 kbars 800°K presented point out limitations these assumptions illustrate anomalous material. Previous measurements single‐crystal tabulated,...
In most recent free oscillation studies of the earth's interior effect absorption upon eigenperiods earth has been ignored. This is equivalent to assuming that close perfectly elastic. Since actual significantly anelastic over seismic frequencies, a frequency-dependent correction order 1% must be applied normal mode periods in models based on those modes may compared with body wave results. The an model uncorrected data, C2 (Anderson and Hart, 1976a), are adjusted for attenuation then...
Drug-induced prolongation of the QT interval can lead to torsade de pointes, a life-threatening ventricular arrhythmia. Finding appropriate assays from among plethora options available predict reliably this serious adverse effect in humans remains challenging issue for discovery and development drugs. The purpose present study was develop verify reliable relatively simple approach assessing, during preclinical development, propensity drugs prolong humans.Sixteen marketed various...
Pneumatosis Intestinalis (PI) is defined as the presence of extra-luminal gas confined to bowel wall. PI an ominous condition often requiring emergent surgery. The management can be challenging in some circumstances, choice surgery versus medical treatment difficult. In this study, we first report case a seventy-seven year old woman presenting emergency department with on computed tomography abdomen. Secondly, review existing literature regarding and suggest algorithm based clinical,...
A theory of dynamic pulse buckling is developed for cylindrical shells subjected to symmetric lateral pressure pulses duration ranging from an ideal impulse durations so long that the a step load. To cover this range three theoretical models are used: tangent modulus model impulsive loads produce plastic flow buckling, strain reversal intermediate which complicated elastic-plastic and elastic buckling. Peak identified as most significant load parameters critical curves generated in...
Seismology, thermodynamics and classical physics—the physics associated with the names of Fourier, Debye, Born, Grüneisen, Kelvin, Rayleigh, Rutherford, Ramberg Birch—show that ambient shallow mantle under large long-lived plates is hundreds degrees hotter than in passive upwellings fuel global spreading ridge system, potential temperatures below about 200 km generally decrease depth deep low shear wave-speed features are broad, sluggish dome-like rather narrow mantle-plume-like. The surface...
A continuum mechanics approach is adopted herein to develop a constitutive model for the nonlinear behaviour of laminated composites up and including ultimate failure. The proposed single layers fibre-reinforced (FRC) derived within framework rate-independent theory orthotropic plasticity. Both unidirectional bidirectional (e.g., woven) FRC are modelled. individual layer equations superimposed using classical lamination yield global laminate response. model's accuracy illustrated by...
Abstract Unusual thrust structures in thin sea ice sheets were observed Labrador and Greenland. These are the result of being wind waves. When thicker pack is subjected to these same forces pressure ridges result.
This paper presents the results of a multiphase research program aimed at investigating out-of-plane stability slender reinforced masonry shear walls (RMSWs) under in-plane reversed-cyclic loading. The objective this study was to evaluate adequacy provisions specified in Canadian design standard, which are currently form height-to-thickness (h/t) limits. For second phase program, is presented paper, evaluation carried out by experimental testing five full-scale RMSW specimens with varying...
Importance Between 5% and 10% of breast cancer cases are associated with an inherited germline pathogenic or likely variant (GPV) in a susceptibility gene (BCSG), which could alter local systemic therapy recommendations. Traditional genetic testing criteria misses proportion these cases. Objective To evaluate the prevalence clinicopathological associations GPVs 2 groups BCSGs among ethnically diverse cohort women newly diagnosed cancer. Design, Setting, Participants This cross-sectional...