Search Results - "Ulrich, Timothy J."

Heart-Rate-Corrected QT Interval Evolution in Premature Infants During the First Week of Life by Ulrich, Timothy J. B., Ellsworth, Marc A., Carey, William A., Zubair, Adeel S., MacQueen, Brianna C., Colby, Christopher E., Ackerman, Michael J.

“…Automated monitoring of the QT interval is increasingly common in a variety of clinical settings. A better understanding of how the heart-rate-corrected QT…”
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Stress corrosion crack depth investigation using the time reversed elastic nonlinearity diagnostic by Anderson, Brian E., Pieczonka, Lukasz, Remillieux, Marcel C., Ulrich, Timothy J., Le Bas, Pierre-Yves

“…Evidence of the ability to probe depth information of stress corrosion cracking (SCC) are presented using the time reversed elastic nonlinearity diagnostic…”
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Post-ligation cardiac syndrome is associated with increased morbidity in preterm infants by Ulrich, Timothy J. B., Hansen, Taylor P., Reid, Kimberly J., Bingler, Michael A., Olsen, Steven L.

“…Objective The influence of post-ligation cardiac syndrome (PLCS), a complication of patent ductus arteriosus (PDA) ligations, on neonatal outcomes is unknown…”
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Three-dimensional time reversal communications in elastic media by Anderson, Brian E., Ulrich, Timothy J., Le Bas, Pierre-Yves, Ten Cate, James A.

“…This letter presents a series of vibrational communication experiments, using time reversal, conducted on a set of cast iron pipes. Time reversal has been used…”
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Emergent thrombectomy in a neonate with an upper extremity arterial thrombus by Ulrich, Timothy J B, Ellsworth, Marc A, Lang, Tara R

“…Case This case report is of a 39 (4/7)weeks infant who presented at the time of birth with an immobile, cyanotic right upper extremity consistent with ischemia…”
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Comparison and visualization of focusing wave fields from various time reversal techniques in elastic media by Anderson, Brian E., Ulrich, Timothy J., Le Bas, Pierre-Yves

“…This Letter presents a series of time reversal experiments conducted on the surface of a fused silica glass block. Four different time reversal techniques are…”
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Time reversal reconstruction of finite sized sources in elastic media by Anderson, Brian E., Griffa, Michele, Ulrich, Timothy J., Johnson, Paul A.

“…The ability of the time reversal process to reconstruct sources of finite size relative to a wavelength is investigated. Specifically the quality of the…”
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Experimental implementation of reverse time migration for nondestructive evaluation applications by Anderson, Brian E., Griffa, Michele, Bas, Pierre-Yves Le, Ulrich, Timothy J., Johnson, Paul A.

“…Reverse time migration (RTM) is a commonly employed imaging technique in seismic applications (e.g., to image reservoirs of oil). Its standard implementation…”
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Elastic response to temperature variations in granular media: A phenomenological analysis by Delsanto, Pier Paolo, Gliozzi, Antonio S., Ulrich, Timothy J.

“…The purpose of this work is to discuss a methodology for the interpretation of experimental data and its application, in the context of thermo-elasto-dynamics,…”
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QTc interval prolongation and severe apneas associated with a change in infant positioning by Ellsworth, Marc A, Ulrich, Timothy J, Carey, William A, Colby, Christopher E, Ackerman, Michael J

“…For more than a decade there has been considerable interest in the role of QT interval prolongation in the pathogenesis of sudden infant death syndrome. It has…”
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Predictive Ability of Direct Antibody Testing in Infants Born to Mothers with Rh(D) and Other Minor Red Blood Cell Antibodies by Ulrich, Timothy J B, Ellsworth, Marc A, Carey, William A, Colby, Christopher E, Soma, David B

“…Hemolytic disease of the newborn (HDN) most commonly occurs in neonates whose mothers carry nonpassively acquired antibodies directed against red blood cell…”
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Energy current imaging method for time reversal in elastic media by Anderson, Brian E., Guyer, Robert A., Ulrich, Timothy J., Le Bas, Pierre-Yves, Larmat, Carène, Griffa, Michele, Johnson, Paul A.

“…An energy current imaging method is presented for use in locating sources of wave energy during the back propagation stage of the time reversal process. During…”
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Probing bonded interfaces with finite-element resonant ultrasound spectroscopy by Geimer, Paul, Ulrich, Timothy J., Whelsky, Amber

“…Resonant ultrasound spectroscopy (RUS) has long been applied for non-destructive quantification of elasticity, geometry, and density in material samples…”
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Principal component analysis for complex geometry modal identification by Beardslee, Luke, Ulrich, Timothy J., Shokouhi, Parisa

“…Recent advances to resonant ultrasound spectroscopy (RUS) to include finite element methods (FERUS) have expanded its application to more complex geometries…”
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Detection and imaging of stress-corrosion cracking in stainless steel using the linear elastodynamics gradient imaging technique by Remillieux, Marcel, Beardslee, Luke, Ulrich, Timothy J.

“…Linear Elastodynamics Gradient Imaging Technique (LEGIT) is a nondestructive testing technique recently developed to image cracks on the surface of samples…”
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Nonlinear resonant ultrasound spectroscopy using white-noise excitation by Geimer, Paul R., Beardslee, Luke, Ulrich, Timothy J.

“…Nonlinear resonant ultrasound spectroscopy (NRUS) is a technique for non-destructive sample evaluation by which a strain-dependent nonlinear parameter is…”
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High-resolution 3D ultrasonic imaging using high-frequency piezoelectric transmitter and ultra-multiple laser 2D scanning by Yamada, Takumi, Ohara, Yoshikazu, Ulrich, Timothy J., Remillieux, Marcel C.

“…In this paper, we extend a piezoelectric and laser ultrasonic system (PLUS) to a high-frequency version for high-sensitivity three-dimensional (3D) ultrasonic…”
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Enhanced resonant ultrasound spectroscopy for multi-material characterization by Geimer, Paul, Beardslee, Luke, Remillieux, Marcel, Ulrich, Timothy J.

“…Resonant ultrasound spectroscopy (RUS) is a non-destructive technique to describe the elastic tensor of a material through inversion of a sample’s measured…”
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Resonant ultrasound spectroscopy for anisotropic materials with misaligned geometric and material axes by Beardslee, Luke, Remillieux, Marcel, Ulrich, Timothy J.

“…Resonant ultrasound spectroscopy (RUS) is a powerful non-destructive technique used to measure the full elastic tensor of a material. The original formulation…”
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Decoupling Nonclassical Nonlinear Behavior of Elastic Wave Types by Remillieux, Marcel C, Guyer, Robert A, Payan, Cédric, Ulrich, T J

“…In this Letter, the tensorial nature of the nonequilibrium dynamics in nonlinear mesoscopic elastic materials is evidenced via multimode resonance experiments…”
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