A5101691576- Methane Hydrates and Related Phenomena
- earthquake and tectonic studies
- Drilling and Well Engineering
- Reservoir Engineering and Simulation Methods
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- Nonprofit Sector and Volunteering
- Geological and Geochemical Analysis
- Hydraulic Fracturing and Reservoir Analysis
- Geological and Geophysical Studies
- Geology and Paleoclimatology Research
- Geological formations and processes
- Seismic Waves and Analysis
- Atmospheric and Environmental Gas Dynamics
- Social Capital and Networks
- Geological and Tectonic Studies in Latin America
- High-pressure geophysics and materials
- Sport and Mega-Event Impacts
- Grouting, Rheology, and Soil Mechanics
- Recreation, Leisure, Wilderness Management
- Geological Studies and Exploration
- Seismology and Earthquake Studies
- Planetary Science and Exploration
- Rock Mechanics and Modeling
- Oil and Gas Production Techniques
Vanderbilt University
2018-2023
University of Nigeria
2023
Nohms Technologies (United States)
2022
American Academy of Cosmetic Dentistry
2019
Scripps Institution of Oceanography
2005-2017
University of Chicago
2017
National Opinion Research Center
2017
University of California, San Diego
2002-2016
La Trobe University
2012-2014
Universidad Católica Santo Domingo
2014
In accretionary wedges, often morphologically similar sedimentary intrusions, when observed by remote geophysical means, may have one of two quite different driving mechanisms and a highly variable significance for the regional hydrogeologic picture. For example, mud diapirs are driven buoyancy forces that arise from bulk density contrasts. them, pore fluid upwell en masse migration is related (sometimes important) but generally subsidiary process. contrast, diatremes contain sediments...
Volunteerism is a key form of community involvement that can provide both physical and mental health benefits for volunteers as well positive outcomes the community. However, become involved different reasons recent studies suggest other-oriented may accrue greater than self-oriented volunteers. To investigate this possibility, we surveyed 4,085 Australian about their motivations using Volunteer Functions Inventory, together with well-being measures self-esteem, well-being, self-efficacy,...
ABSTRACT This study examines the potentially mediated relationship between volunteering and well-being. Using survey data from a random sample (N = 2,990) of population state Victoria, Australia, three hypotheses were tested: Volunteers will report higher well-being than nonvolunteers; volunteers self-esteem, self-efficacy, social connectedness mediate volunteer status Results supported showed that all significant mediators volunteering–well-being relationship. Increased associated with was...
Mud diapirism has recently been recognized in several modern accretionary wedges. It provides an important means of dewatering wedges and should be regarded as process for producing the melanges found both ancient terranes. affects a large area Barbados Ridge Accretionary Complex. The distribution mud diapirs appears to primarily controlled by presence underconsolidated terrigenous submarine fan deposits that are being accreted complex. frequency diapir occurrence decreases northward becomes...
Drilling near the deformation front of northern Barbados Ridge cored an accretionary prism consisting imbricately thrusted Neogene hemipelagic sediments detached from little-deformed Oligocene to Campanian underthrust deposits by a decollement zone composed lower Miocene upper Oligocene, scaly radiolarian claystone. Biostrati-graphically defined age inversions define thrust faults in that correlate between sites and are apparent on seismic reflection sections. Two located 12 17 km west...
Research Article| December 01, 1999 Measurements of transience and downward fluid flow near episodic methane gas vents, Hydrate Ridge, Cascadia Michael D. Tryon; Tryon 1Scripps Institution Oceanography, University California, San Diego, La Jolla, California 92093-0220, USA Search for other works by this author on: GSW Google Scholar Kevin M. Brown; Brown Marta E. Torres; Torres 2Oregon State University, Center Oceanic Atmospheric Science, Corvallis, Oregon 97331-5503, Anne Tréhu; Tréhu James...
Research Article| March 01, 1994 Heterogeneous hydrofracture development and accretionary fault dynamics Kevin M. Brown; Brown 1Scripps Institution of Oceanography, La Jolla, California 92093-0220 Search for other works by this author on: GSW Google Scholar Barbara Bekins; Bekins 2Earth Sciences Department, University California, Santa Cruz, 95064 B. Clennell; Clennell 3University Birmingham, United Kingdom D. Dewhurst; Dewhurst G. Westbrook Geology (1994) 22 (3): 259–262....
Cold seep ecosystems can support enormous biomasses of free-living and symbiotic chemoautotrophic organisms that get their energy from the oxidation methane or sulfide. Most this biomass derives animals are associated with bacterial symbionts, which able to metabolize chemical resources provided by seeping fluids. Often these systems also harbor dense accumulations non-symbiotic megafauna, be relevant in exporting chemosynthetically fixed carbon seeps surrounding deep sea. Here we...
(1996). The role of internal and external factors in the discontinuation off‐campus students. Distance Education: Vol. 17, No. 1, pp. 44-71.
This paper explores the relationship between involvement in sport and non-sport community organisations social connectedness. Data were collected on types of involvement, selected demographic variables The findings support contention that is associated with increased levels Sport was found to be a predictor connectedness, while not. study also tenure intensity not significantly connectedness scores.
Temperature is believed to have an important control on frictional properties of rocks, yet the amount experimental observations time‐dependent rock friction at high temperatures rather limited. In this study, we investigated healing Westerly granite in a series slide‐hold‐slide experiments using direct shear apparatus ambient between 20°C and 550°C. We observed that room temperature coefficient increases proportion logarithm hold time rate consistent with findings previous studies. For...
Abstract We conducted a series of experiments to explore the rate and state frictional properties gabbro at conditions thought be representative slow slip events (SSEs) in subduction zones. The were using heated direct shear apparatus. tested both solid simulated gouge samples low effective normal stress (5–30 MPa) over broad range temperatures (20–600°C) under dry hydrated conditions. In tests performed on samples, we observed stable sliding (20–150°C), stick high (350–600°C), transitional...
Abstract The deep limit to seismicity in continental crust is believed be controlled by a transition from velocity‐weakening velocity‐strengthening friction based on experimental measurements of the rate dependence at different temperatures. Available data granite suggest stable creep about 350°C (∼15 km depth). Here we present results unconfined experiments Westerly both dry and hydrated conditions that show increasingly unstable slip (velocity‐weakening behavior) temperature up 600°C. A...