A5045376322- Aerodynamics and Fluid Dynamics Research
- Wind and Air Flow Studies
- Vehicle emissions and performance
- Fluid Dynamics and Vibration Analysis
- Fuel Cells and Related Materials
- Analytical Chemistry and Sensors
- Fluid Dynamics and Turbulent Flows
- Advanced Fiber Optic Sensors
- Non-Destructive Testing Techniques
- Adhesion, Friction, and Surface Interactions
- Electrocatalysts for Energy Conversion
- Advanced Sensor Technologies Research
- Advanced Surface Polishing Techniques
- Vehicle Dynamics and Control Systems
- Advanced Battery Technologies Research
- Gamma-ray bursts and supernovae
- Force Microscopy Techniques and Applications
- Aluminum Alloy Microstructure Properties
- Anodic Oxide Films and Nanostructures
- Surgical Sutures and Adhesives
- Membrane-based Ion Separation Techniques
- Aerospace and Aviation Technology
- Seismic and Structural Analysis of Tall Buildings
- Polymer Surface Interaction Studies
- Intestinal and Peritoneal Adhesions
University of Denver
2018-2019
Scribner (United States)
2005-2017
American Academy of Dermatology
2015
National Research Council Canada
1993-2012
Johnson & Johnson (United States)
2007-2012
Kansas State University
2012
Luna Innovations (United States)
2002-2005
Dynamic Research (United States)
2005
Motorola (United States)
2002-2003
National Academies of Sciences, Engineering, and Medicine
1980-2003
Wind tunnel measurements on a rectangular vehicle-like shape and two detailed, scale-model trucks have been employed to define the front rear edge geometries that minimize aerodynamic drag. Optimum configurations are identified with sufficient detail for commercial vehicle design purposes. Comparisons of model-scale limited full-scale straight truck in large wind support interpretation these test results.
Biphenyl was grafted on rigid-rod aromatic poly(p-phenylenesulfonic acids) (IEC ∼ 8 mequiv g–1) to generate cross-linkable polyelectrolytes. Cross-linking conditions and film properties before after cross-linking were studied. Films equilibrated between 20 30% relative humidity (RH) had tensile moduli of 2 1 GPa broke at 5 9% elongation. The decreased as RH increased dropped drastically high if the films not cross-linked. Grafted conductivities 80 °C 4–5 times that Nafion NR-212 over whole...
During the late 1970's and early 1980's considerable effort was expended in improvement of truck aerodynamics to reduce fuel consumption. This first-generation focused on aerodynamic drag reduction obtained from add-on aids cab or trailer, improved shaping body/trailer front-end edge rounding. Rising prices have renewed interest further improvements. paper will review past developments show that several unused concepts offer potential as second-generation, add-on, fuel-saving technology. It...
Production of smooth, defect-free silicon surfaces is essential for the fabrication precise three-dimensional devices. Micromachining usually involves anisotropic etching in alkaline media such as potassium hydroxide-isopropanol mixtures (KOH/IPA). The quality etched highly dependent on conditions and surface inhomogeneities micropyramids or pits can present major problems, In investigation, purity reagents used etchant effects dissolved gases, oxygen nitrogen, finish have been evaluated...
Porphyrins play key roles in natural energy conversion systems, including photosynthesis and oxygen transport. Because of their chemical stability, unique optical properties synthetic versatility, porphyrins are well suited as sensors. One successful application is the use platinum porphyrin (PtP) pressure-sensitive paint (PSP). Oxygen film quenches luminescence, pressure was initially monitored by measuring ratio I(wind-off)/I(wind-on). But this compromised if there model motion layer...
An instrument and procedure for evaluation of the through-plane ionic resistance conductivity polymer electrolyte membranes (PEMs) is presented. The approach facilitates rapid bare, as-manufactured over a wide range temperatures relative humidity conditions. use bare membrane key feature because primary application characterization developmental materials which testing fuel cell not practicable. Accurate requires adjusting measured high frequency nonmembrane ohmic contributions. Nonmembrane...
Ionic transport resistance is a key performance property of polymer electrolyte membranes (PEMs) and can be determined for within the plane material (in-plane, longitudinal or transverse directions) through thickness membrane (through-plane). The conductivity extruded Nafion® 112, dispersion-cast NR-212 two Gore-Select® that contain non-conductive support were characterized as function orientation, temperature relative humidity. Nafion 112 was highest in extrusion direction lowest...
The National Research Council of Canada (NRC) has completed the second round full-scale wind tunnel tests on Class-8 tractor-trailer combinations. primary intent program is to effect a reduction in greenhouse-gas emissions by reducing fuel consumption trucks through aerodynamic drag reduction. Add-on components developed at NRC several decades ago have become important contenders for This encouraged commercialization these technologies and this evaluated first commercial products. Three...
ABSTRACT The super hydrophobic, self‐cleaning properties of natural species derive from the fine hierarchical topography evolved on their surfaces. Hierarchical architectures which are function‐mimetic lotus leaf here described and created multi‐scale assembled templates. first level hierarchy was a micromachined dome structure template second added by layering thin nanoporous membrane such as porous anodized alumina or an ion track etch membrane. templates were nanoimprinted single step...
Reducing windthrow hazard has become a management issue in many parts of the world, especially when leaving mature forest strips after clearcutting (Ruel, 1995). Scaled topographic models have been used successfully wind tunnels to understand behaviour gently rolling terrain and in.simple topography (Miller et al., 1987; Teunissen Ruck Adams, 1991). They could also be useful complex 1987). To assess stability left along streams clearcutting, field monitoring study was implemented 1988—1989....
The conditions for bundle instability were determined spring-mounted, sectional models in the wind tunnel. stability boundaries are good agreement with predicted values from a quasi-steady analysis using measured mean forces. analytical model was extended to three-dimensional, multi-subspan catenary. Predictions compared some observations full-scale line and reduced scale span large Experimental studies showed that twisting through 30 degrees per subspan prevents oscillation. Extensive wake...