The benefits from practice follow a nonlinear function: Improvement is rapid at first but decreases as the practitioner becomes more skilled (see, e.g., Thorndike, 1913). The idea that a simple nonlinear function might describe practice effects in a broad range of tasks was championed by Newell and Rosenbloom’s (1981) influential chapter entitled “Mechanisms of Skill Acquisition and the Law of ...

18F-T807 is a PET radiotracer developed for imaging tau protein aggregates, which are implicated in neurologic disorders including Alzheimer disease and traumatic brain injury (TBI). The current study characterizes 18F-T807 pharmacokinetics in human subjects using dynamic PET imaging and metabolite-corrected arterial input functions. Methods: Nine subjects (4 controls, 3 with a history of TBI, ...

Three-Dimensional Modeled Custom-made Noninvasive Positive Pressure Ventilation Masks in an Infant Allison Carroll, Israel Amirav, Roger Marchand, Deb Olmstead, Heather Logan, Andrew Grosvenor, Carina Majaesic, Joanna MacLean, and Piush J. Mandhane Division of Pediatric Pulmonology, Department of Mechanical Engineering, and Institute of Reconstructive Sciences in Medicine, University of Alberta...

Department of Plants, Soils, and Biometeorology, Utah State University, Logan, Utah 84322-4820, Department of Agronomy, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803-2110, Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware 19717-1303, USDA-ARS, U.S. Salinity Laboratory, 450 Big Springs Road, R...

a Social, Genetic, Developmental & Psychiatry Centre, Institute of Psychiatry, King's College London, London SE5 8AF, United Kingdom b School of Education, University of Delaware, Newark, DE 19716 USA c Psychology Department, Logan Hall 160, University of New Mexico, MSC03 2220 Albuquerque, NM 87131 USA d Department of Pathology, School of Medicine, University of New Mexico, MSCO8 4640, Albuque...

A historical account of the important landmarks in man's experience with the high altitude environment is followed by comments on the important stages in the understanding of its physiological effects. The work of The Mount Logan High Altitude Physiology Study on acute mountain sickness is reviewed from its inception in 1967 until the present.

Effect of Ammonium Chloride on Predatory Consumption Rates of Brook Trout (Salvelinus fontinalis) on Juvenile Chinook Salmon (Oncorhynchus tshawytscha) in Laboratory Streams James L. Hedtke' and Logan A. Norris2 'Department of Fisheries and Wildlife, Oak Creek Laboratory of Biology, Oregon State University, Corvallis, Or. 97331 2U.S. Department of Agriculture, Forest Service, Pacific Northwest ...

In 1937, Logan and Taylor (1) came to the conclusion “that the bone salts cannot precipitate spontaneously from the bone plasma unless the ion product is increased. Once formed, the bone salts cannot dissolve unless the concentrations of the ions composing them are decreased below the concentrations found in the blood plasma.” This conclusion was based upon some observations which seemed to Log...

In 1937, Logan and Taylor (1) came to the conclusion “that the bone salts cannot precipitate spontaneously from the bone plasma unless the ion product is increased. Once formed, the bone salts cannot dissolve unless the concentrations of the ions composing them are decreased below the concentrations found in the blood plasma.” This conclusion was based upon some observations which seemed to Log...