A5038261513- Laser-Plasma Interactions and Diagnostics
- Tree-ring climate responses
- Plant Water Relations and Carbon Dynamics
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Computational Fluid Dynamics and Aerodynamics
- Magnetic confinement fusion research
- Fluid Dynamics and Turbulent Flows
- Literature: history, themes, analysis
- World Wars: History, Literature, and Impact
- Australian History and Society
- Hydrology and Drought Analysis
- Nuclear Physics and Applications
- Archaeological Research and Protection
- Science Education and Perceptions
- High-pressure geophysics and materials
- Electric Motor Design and Analysis
- Induction Heating and Inverter Technology
- French Historical and Cultural Studies
- Travel Writing and Literature
- Forest ecology and management
- Military History and Strategy
- Vacuum and Plasma Arcs
- Gas Dynamics and Kinetic Theory
- Ecology and Vegetation Dynamics Studies
Los Alamos National Laboratory
1997-2021
Royal Society
2012-2016
Cranfield University
1994-2010
Universiti Teknologi MARA
2003-2010
Universiti Teknologi MARA System
2001-2006
University of Technology Malaysia
2003
Richard Wolf (Germany)
2001-2002
Royal Military College of Canada
1996-1999
Stony Brook University
1993-1995
Courant Institute of Mathematical Sciences
1995
Richtmyer–Meshkov instability is investigated for negative Atwood number and two-dimensional sinusoidal perturbations by comparing experiments, numerical simulations analytic theories. The experiments were conducted on the NOVA laser with strong radiatively driven shocks Mach numbers greater than 10. Three different hydrodynamics codes (RAGE, PROMETHEUS FronTier) reproduce amplitude evolution gross features in experiment while fine-scale differ techniques. Linearized theories correctly...
Front tracking simulations of the Richtmyer-Meshkov instability produce significantly better agreement with experimentally measured growth rates than obtained in nontracking computations. Careful analysis early stages shock acceleration process show that nonlinearity and compressibility play a critical role behaviour shocked interface are responsible for deviations from linear theories. The late-time rate is compared to nonlinear potential flow model Hecht et al .
The acceleration of a material interface by shock wave generates an instability known as the Richtmyer-Meshkov instability. Previous attempts to model growth rate have produced values that are almost twice experimental measurements. This Letter presents numerical simulations using front tracking for first time in quantitative agreement with experiments shocked air-${\mathrm{SF}}_{6}$ interface. Moreover, failure impulsive model, and linear theory from which it is derived, correctly...
Laser beams that directly drive a cylindrical implosion are used to create measurable region of mixed material in compressible plasma state, for the first time convergent geometry. The turbulence driven by Richtmyer–Meshkov instability shock passage across density discontinuity mixes marker is radiographically opaque. width mix layer compared between system with large surface roughness and an initially smooth system. experiment described results multi-dimensional numerical simulation,...
In order to gain an understanding of the spatial connections between instrumental and proxy climatic data in subtropical regions, we investigated patterns climate tree-growth anomalies montane forests northwestern Argentina. Principal components technique was used identify dominant tree growth anomalies. A 43-year set monthly total precipitation at a selected network thirty- one stations Argentina analysed on annual seasonal basis. The most pattern shows same sign over practically whole...
ABSTRACT: Tree‐ring chronologies were derived from two coniferous species growing in the foothills of Patagonian Andes Argentina, using crossdating and standardization techniques developed by Laboratory Tree‐Ring Research. Seven these selected, along with data long reliable gaging stations to reconstruct annual stream‐flow for major rivers extending back year 1601. Calibration between tree‐ring river flow was established multivariate technique canonical analysis. Correlations 0.73 obtained...
The tree‐ring patterns of birch and pine in the Torneträsk area Swedish Lapland were compared. In order to dendrochronologically identify years major insect attacks on birch, being unaffected by these outbreaks, served as control. sharp growth increase following historically confirmed, heavy outbreak 1954–55 is discussed evidence pointing possible earlier outbreaks presented.
Abstract This paper is an attempt to use genre analysis explore the sources of variation in structure texts produced within academic communities. The “move” Discussion Sections 43 recent articles agricultural economics journals sponsored by national professional associations United States, Canada, Kingdom, Australia and India was analyzed. frequency distribution moves degree structural complexity these examined. It noted that showed distinct preferences for certain although there some...
There has recently been considerable interest in various forms of collaborative learning. This study examines the project work university students a TESOL (Teaching English as Second Language) programme for whom is second language. It compares phonetics and phonology projects completed by working pairs with those alone. was found that who worked together produced better had more positive attitudes. However, it observed sometimes involved conflict, manipulation and/or deception. suggested...
One of the principal advantages a double-shell capsule design is potential for ignition without requiring cryogenic implosions. These designs compress deuterium fuel by transferring kinetic energy from laser-ablated outer shell to an inner means nearly elastic symmetric collision. However, prior this collision experiences varying levels preheat such that any nonuniformities can evolve significantly. It condition these perturbations at time collision-induced shock compresses ultimately...