Tyler Allen

Topographical Organization of Prefrontal Cortex and Adjacent Areas Projections to the Dorsomedial Caudate–Putamen in Rats: A Retrograde Tracing Study

Christopher L. Robison, Theodore N. Kazan, Rikki L. A. Miller, Tyler Allen et autres

The dorsomedial caudate-putamen (dmCPu), a key input structure of the basal ganglia, plays a crucial role in goal-directed behaviors and the transition to habits. The functional specialization of the dmCPu along its anteroposterior axis suggests that distinct prefrontal cortex (PFC) subregions may …

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Assessment of ethanol and nicotine interactions using a reinforcer demand modeling with grouped and individual levels of analyses in a long-access self-administration model using male rats

Christopher L. Robison, Nicole Cova, Victoria Madore, Tyler Allen et autres

Previous reports have indicated the reciprocal effects of nicotine and ethanol on their rewarding and reinforcing properties, but studies using methodological approaches resembling substance use in vulnerable populations are lacking. In our study, rats first self-administered ethanol, and their sensitivity to ethanol's …

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Reliability of a Smartphone Neuropsychological Performance Self-Monitoring App Named Roberto: Correlational Study (Preprint)

Tyler Allen, Anthony J. Goreczny, George V. Kondraske, Masha Berman et autres

BACKGROUND As technology advances to create new devices capable of neuropsychological measurements, new possibilities emerge. Smartphones are one such device that many people own. Smartphone-based measurements may increase consumer, clinician, and researcher access to neuropsychological data. To explore smartphones for this purpose, …

Test–retest reliability of RC21X: a web-based cognitive and neuromotor performance measurement tool

Xanthia Saganis, Anthony J. Goreczny, George V. Kondraske, Masha Berman et autres

OBJECTIVE: As computerized cognitive testing becomes increasingly popular in clinical and research settings, conducting studies on efficacy and psychometric properties is essential. One such program is RC21X, a web-based brain performance measurement tool. Based on empirically supported neurocognitive and neuromotor tasks, the …

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Inter-rater reliability of DartfishTM movement analysis software for measuring maximum flexion and extension at the hip and knee in older adults with osteoporosis and osteopenia

Tyler Allen, Zachary Hollingham, James MacWhirter, Mark F. Welsh et autres

Various methods are used to measure hip and knee joint motion angles; however, their use is often limited by cost or inability to measure dynamic movements. The assessment of movement patterns is clinically useful in individuals with osteoporosis (OP) and osteopenia (OPe) …

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Temperature Sensitivity of Composite Propellants Containing Novel Nano-Additive Catalysts

Andrew R. Demko, Tyler Allen, Catherine A. M. Dillier, Thomas E. Sammet et autres

Recent synthesis methods developed by the authors for producing titania premixed in the binder or grown in situ produce 20-nm-sized particles homogeneously distributed within the binder. The focus of the present paper was to further demonstrate the increased effectiveness of the in …

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Comparison of Commercially Available and Synthesized Titania Nano‐Additives in Composite HTPB/AP Propellant

Andrew R. Demko, Tyler Allen, James Chris Thomas, Mitch C. Johnson et autres

Abstract This study presents a comparison of commercially available titania nano‐particles produced using electric wire explosion with nano‐particles manufactured by the authors using a sol‐gel synthesis process. For the present study, 20‐nm titania was purchased off‐the‐shelf. It was determined to be rough …

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In situ synthesis of polyurethane–TiO2 nanocomposite and performance in solid propellants

David L. Reid, Robert Draper, David W. Richardson, Andrew R. Demko et autres

Achieving a homogeneous nanoparticle dispersion is a frequent challenge in the preparation of polymer–matrix nanocomposites. In this paper, we report a polyurethane–TiO2 composite with improved nanoparticle dispersion by the in situ synthesis of TiO2 nanoparticles in a solution containing the pre-polymer hydroxyl-terminated …

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Laboratory-Scale Burning and Characterizing of Composite Solid Propellant for Studying Novel Nanoparticle Synthesis Methods

Tyler Allen

This thesis examines the effects of nanoparticle, metal-oxide additives on the burning rate of composite solid propellants. Recent advancements in chemical synthesis techniques have allowed for the production of improved solid rocket propellant nano-scale additives. These additives show larger burning rate increases …

Laboratory-Scale Burning of Composite Solid Propellant for Studying Novel Nanoparticle Synthesis Methods

Tyler Allen, Andrew R. Demko, Mitch C. Johnson, Thomas E. Sammet et autres

Recent advancements in chemical synthesis techniques have allowed for the production of improved solid rocket propellant nano-scale additives. These additives show larger burning rate increases in composite propellants compared to previous additive generations. In addition to improving additive effectiveness, novel synthesis methods …

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NOTES ON TWO CASES OF ERASION OF THE KNEE-JOINT.

Tyler Allen