This study presents the status and results from an effort to design, fabricate, and test an adaptive jet engine chevron concept based upon embedding shape memory alloy (SMA) actuators in a composite laminate, termed a SMA hybrid composite (SMAHC). The approach for fabricating the adaptive SMAHC chevrons involves embedding prestrained Nitinol actuators on one side of the mid-plane of the composi...

Chevron mixing devices are used to reduce noise from commercial separate-flow turbofan engines. Mechanical chevron serrations at the nozzle trailing edge generate axial vorticity that enhances jet plume mixing and consequently reduces far-field noise. “Fluidic chevrons” generated with air injected near the nozzle trailing edge create a vorticity field similar to that of the mechanical chevrons ...

Local-nonlocal coupling is an organizational principle in protein folding. It envisions a cooperative energetic interplay between local conformational preferences and favorable nonlocal contacts. Previous theoretical studies by our group showed that two classes of native-centric coarse-grained models can capture the experimentally observed high degrees of protein folding cooperativity and diver...

We administered the revised Assessment of Qualitative and Structural Dimensions of Object Representations (Blatt, Chevron, Quinlan, Schaffer, & Wein, 1992) to 279 male and female undergraduate students and carried out independent principal components analyses of maternal and paternal ratings. Three stable factors, Agency, Communion, and Structure, were found in both sets of ratings. This factor...

K I M B E R L Y J . H A G E M A N , * , † J O N A T H A N D . I S T O K , ‡ J E N N I F E R A . F I E L D , § T I M O T H Y E . B U S C H E C K , | A N D L E W I S S E M P R I N I ‡ Department of Chemistry, Department of Civil, Construction, and Environmental Engineering, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331 and Chevron Research ...

The uniform alignment of Ferroelectric LCs (FLC) on inorganic thin film surfaces can be obtained using oblique ion beam sputtering deposition on substrates. Large deposition angle from 60o to 80 o can be used for thin SiO2 alignment layer, which thickness can vary from 5nm to 40 nm. Two types of uniform alignment of “chevron” (before electrical treatment) and “quazibookshelf” (after electrical ...

Impact of chevron spacing and asymmetric distribution on supersonic jet acoustics and flow" (2016).

A detailed investigation of the statistical properties near-field pressure fluctuations induced by an under-expanded jet, varying nozzle exit shapes has been presented. Experiments using different convergent Chevron nozzles were carried out in anechoic chamber at University Bristol to assess importance shape on near field emitted a single stream jet. Measurements through axial microphone array ...

When an electric field is applied to chiral smectic A (SmA) liquid crystals, a tilt is induced in the director of orthogonal SmA liquid crystals (electroclinic effect). The layer shrinkage due to the tilted smectic arrangement is mitigated by local layer deformation. This paper presents detailed measurements of the local layer spacing under the electroclinic effect of the chiral SmA phase in a ...