نتایج جستجو برای: shepard
تعداد نتایج: 746 فیلتر نتایج به سال:
During the course of previous studies on pleuropneuimonialike organisms (PPLO) and their possible role in the etiology of nongonococcal urethritis (NGU), a minute, morphologically distinct PPLO colony form was observed (Shepard, 1954.) More recent studies have substantiated this observation. These minute colonies of pleuropneumonialike organisms were designated T-form (tiny) PPLO colonies. They...
Critical periods represent phases of development during which neuronal circuits and their responses can be readily shaped by stimuli. Experience-dependent plasticity that occurs within these critical periods can be influenced in many ways; however, Shepard et al. (J Neurosci 35: 2432-2437, 2015) recently singled out norepinephrine as an essential driver of this plasticity within the auditory co...
Nonlinear dimensionality reduction aims at providing lowdimensional representions of high-dimensional data sets. Many new methods have been proposed in the recent years, but the question of their assessment and comparison remains open. This paper reviews some of the existing quality measures that are based on distance ranking and K-ary neighborhoods. Many quality criteria actually rely on the a...
Traditional classification learning studies tell us that people learn to attend to the diagnostic features of exemplars (Kruschke, 1992; Medin & Schaffer, 1978; Shepard, Hovland, & Jenkins, 1961). But recent research has discovered that the learning task influences what information people learn about categories (Markman & Ross, 2003). A learning task can either be the primary goal or be inciden...
Recognition, after 1, 3, 6, 15, and 30 intervening events, for CCC and CVC trigrams of low, medium, and high meaningfulness (M) was studied in the Shepard-Teghtsoonian paradigm. Correct recognition varied directly with M and inversely with number of intervening events. False recognition varied inversely with M and increased with total number of presentations. Confidence in correct recognitions ...
J. Clayton Finley, Jr., Michael O’Leary, Derin Wester, Steven MacKenzie, Neil Shepard, Stephen Farrow, and Warren Lockette Department of Otolaryngology, Naval Medical Center, San Diego, California 92134; Department of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan 48201; Department of Audiology, Speech Pathology, and Balance Center, University of Pennsylvania, Philad...
In the words of Shepard the great sensitivity of Mycobacterium leprae to 4-4'-diaminodiphenyl sulfone (DDS) was at first surprising (13) . The DDS sensitivity of some other mycobacteria was shown by Karlson ( 3) to be much higher. Since many new species of mycobacteria have been described since 1963, we thought it would be useful to tes t these and to determine the minimal inhibitory concentrat...
Peter J. Hotez*, Miriam Alvarado, Marı́a-Gloria Basáñez, Ian Bolliger, Rupert Bourne, Michel Boussinesq, Simon J. Brooker, Ami Shah Brown, Geoffrey Buckle, Christine M. Budke, Hélène Carabin, Luc E. Coffeng, Eric M. Fèvre, Thomas Fürst, Yara A. Halasa, Rashmi Jasrasaria, Nicole E. Johns, Jennifer Keiser, Charles H. King, Rafael Lozano, Michele E. Murdoch, Simon O’Hanlon, Sébastien D. S. Pion, Ra...
A. Two quite different forms of nonlinear principal component analysis have been proposed in the literature. The first one is associated with the names of Guttman, Burt, Hayashi, Benzécri, McDonald, De Leeuw, Hill, Nishisato. We call itmultiple correspondence analysis. The second form has been discussed by Kruskal, Shepard, Roskam, Takane, Young, De Leeuw, Winsberg, Ramsay. We call it no...
Quantum-mechanical calculations of the reaction rate for dissociative adsorption of N2 on stepped Ru(0001) are presented. Converged six-dimensional quantum calculations for this heavy-atom reaction have been performed using the multiconfiguration time-dependent Hartree method. A potential-energy surface for the transition-state region is constructed from density-functional theory calculations u...
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