Search Results - "Butler, John L"

R. L. Pritchard's classic mutual impedance contribution by Butler, John L.

“…The Reflections series takes a look back on historical articles from The Journal of the Acoustical Society of America that have had a significant impact on the…”
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The modal projector by Butler, John L., Butler, Alexander L., Butler, Stephen C.

“…The superposition of acoustical modes radiated from a transducer can provide directionality from a compact projector. This paper presents the foundation, as…”
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Thermal model for piezoelectric transducers (L) by BUTLER, John L, BUTLER, Alexander L, BUTLER, Stephen C

“…A lumped parameter equivalent circuit basis for calculating and allocating heat power sources in a transducer is presented along with experimental results. The…”
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Mixed Methods Research in Marriage and Family Therapy: A Content Analysis by Gambrel, Laura Eubanks, Butler VI, John L.

“…Considering mixed methods research is gaining reputability in the marriage and family therapy field (Research methods in family therapy, Guilford, 2005), we…”
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On the road to extinction? Population declines of the endangered white abalone, Haliotis sorenseni by Stierhoff, Kevin L., Neuman, Melissa, Butler, John L.

“…► White abalone, Haliotis sorenseni, was listed as endangered in 2001. ► Low densities are thought to inhibit recovery through poor reproductive success. ► A…”
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Transducer figure of merit (L) by BUTLER, John L

“…An alternative formula for determining the volume-referenced, projector-transducer figure of merit, FOM(v), is developed allowing an evaluation based on well…”
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A tri-modal directional transducer by Butler, John L, Butler, Alexander L, Rice, Joseph A

“…Acoustic transducers made from piezoelectric ceramic cylinders usually exploit the breathing or omnidirectional (omni) mode of vibration. However, with…”
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Training Considerations for MFTs in Couple and Financial Counseling by Rappleyea, Damon L., Jorgensen, Bryce L., Taylor, Alan C., Butler, John L.

“…Evidence suggests that many couples attending marital therapy report that financial concerns have a significant impact on their distress. Despite the…”
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Movement and home range of pink abalone Haliotis corrugata: implications for restoration and population recovery by Coates, Julia H., Hovel, Kevin A., Butler, John L., Klimley, A. Peter, Morgan, Steven G.

“…Densities of abalone in southern California have been dramatically reduced by overfishing and disease, leading to the collapse of some populations, and low…”
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Dipole transducer enhancement from a passive resonator by Butler, John L, Butler, Alexander L, Curtis, Victoria

“…A passive resonator model for enhancing the low frequency performance of dipole transducers is presented using a spherical wave function model. It is shown…”
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Recruitment and recovery of pink abalone (Haliotis corrugata) in a historically overexploited kelp forest: Are local populations self-sustaining? by Coates, Julia H., Hovel, Kevin A., Butler, John L., Bohonak, Andrew J.

“…After experiencing a reduction in density, many populations of benthic, broadcast spawning marine invertebrates have struggled to recover or have collapsed…”
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Estimation of spawning habitats of market squid (Doryteuthis opalescens) from field surveys of eggs off Central and Southern California by Zeidberg, Louis D, Butler, John L, Ramon, Darlene, Cossio, Anthony, Stierhoff, Kevin L, Henry, Annette

“…Like many other loliginid squid, Doryteuthis (Loligo) opalescens deposits egg cases on the ocean floor. Depending upon temperature, egg cases may persist for…”
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Evaluation of rockfish abundance in untrawlable habitat: combining acoustic and complementary sampling tools by Jones, Darin T, Wilson, Christopher D, De Robertis, Alex, Rooper, Christopher N, Weber, Thomas C, Butler, John L

“…Rockfishes (Sebastes spp.) are an important component of North Pacific marine ecosystems and commercial fisheries. Because the rocky, high-relief substrate…”
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Bullying: A Family and School System Treatment Model by Butler, John L., Lynn Platt, Rhi Anna

“…Because bullying is often conceptualized as a school problem, most interventions are school-based and exclude the family. However, joint family and school…”
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Estimating species and size composition of rockfishes to verify targets in acoustic surveys of untrawlable areas by Rooper, Christopher N, Martin, Michael H, Butler, John L, Jones, Darin T, Zimmermann, Mark

“…Rockfish (Sebastes spp.) biomass is difficult to assess with standard bottom trawl or acoustic surveys because of their propensity to aggregate near the…”
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Biology and population dynamics of cowcod in the southern California Bight by Butler, John L, Jacobson, Larry D, Barnes, J. Thomas, Moser, H. Geoffrey

“…Cowcod (Sebastes levis) is a large (100-cm-FL), long-lived (maximum observed age 55 yr) demersal rockfish taken in multispecies commercial and recreational…”
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Transducer cloaking for Kim Benjamin by Butler, John L.

“…There is an effort to develop metamaterials for cloaking objects in a way that eliminates backscattering and fills in the shadow zone. The development of this…”
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Modal transducers and Stan Ehrlich by Butler, John L.

“…There have been a number of transducer designs which use the dipole mode of a piezoelectric cylinder to obtain directionality since Stan Ehrlich’s early patent…”
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A low-frequency directional flextensional transducer and line array by Butler, Stephen C., Butler, John L., Butler, Alexander L., Cavanagh, George H.

“…A unique low-frequency (900 Hz) class IV flextensional transducer that produces an enhanced far-field pressure on one side and canceled far-field pressure on…”
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The octoid modal vector projector by Butler, Alexander L., Butler, John L.

“…The eight piston octoid transducer is a descendent of the three piston trioid and four piston astroid transducers. These transducers were developed for low…”
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