162,069 research outputs found
Learning dynamics leading to persistent activity in recurrent networks of spiking neurons
No full textStefano Ferraina, Fabio Babiloni, Fabio Ferlazz
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
SYSTEM AND METHOD FOR COGNITIVE ASSESSMENT AND TRAINING OF AN ANIMAL
No full textAn apparatus and method for cognitive assessment and training of an animal subject. A subject is placed in a testing environment, such as a subject chamber of a cognitive assessment and training apparatus. At least one cognitive assessment and training session comprising a plurality of trials is performed. In a trial, a trial assembly is prepared at a first level. The trial assembly includes at least one stimuli and a reward, where a target stimuli of the at least one stimuli is associated with the reward. The subject is allowed access to the stimuli. When a correct response is determined from the subject, the subject is allowed to access a reward associated with the correct response. The subject is advanced to trials at a next level when a learning criterion is reached. At least one cognitive assessment score is generated based on the plurality of trials and the at least one cognitive assessment and training session
Retrospective and prospective persistent activity induced by Hebbian learning in a recurrent cortical network
No full textRecordings from cells in the associative cortex of monkeys performing visual working memory tasks link persistent neuronal activity, long-term memory and associative memory. In particular, delayed pair-associate tasks have revealed neuronal correlates of long-term memory of associations between stimuli. Here, a recurrent cortical network model with Hebbian plastic synapses is subjected to the pair-associate protocol. In a first stage, learning leads to the appearance of delay activity, representing individual images ('retrospective' activity). As learning proceeds, the same learning mechanism uses retrospective delay activity together with choice stimulus activity to potentiate synapses connecting neural populations representing associated images. As a result, the neural population corresponding to the pair-associate of the image presented is activated prior to its visual stimulation ('prospective' activity). The probability of appearance of prospective activity is governed by the strength of the inter-population connections, which in turn depends on the frequency of pairings during training. The time course of the transitions from retrospective to prospective activity during the delay period is found to depend on the fraction of slow, N-methyl-D-aspartate-like receptors at excitatory synapses. For fast recurrent excitation, transitions are abrupt; slow recurrent excitation renders transitions gradual. Both scenarios lead to a gradual rise of delay activity when averaged over many trials, because of the stochastic nature of the transitions. The model reproduces most of the neuro-physiological data obtained during such tasks, makes experimentally testable predictions and demonstrates how persistent activity (working memory) brings about the learning of long-term associations
Burned human remains: diachronic analysis of cremation rituals in necropolises of northern Italy
No full textThe funeral ritual of cremation has been practiced since ancient times and is an important source of information for the reconstruction of past mortuary behavior. In this study, 387 cremation tombs from five sites in the Po Valley (northern Italy) belonging to different periods (from the Bronze Age to the Roman Age) were examined to identify possible diachronic differences in cremation rituals. Anthropological analyses consisted of sex and age-at-death determination and estimation of the minimum number of individuals. Factors such as color variations of bones, fragmentation, skeletal completeness, and presence of animal bones were investigated as indicators of the funeral ritual. Different representation of the two sexes and different age-at-death were compared, as were single burials versus multiple ones. The results demonstrated significant differences among periods for almost all variables considered. The Bronze Age sample presented a higher frequency of single graves. The Iron and Roman Age samples showed a higher frequency of subadults than the Bronze Age. The cremations from all periods showed high frequencies of arm and leg bones, but the Roman Age sample showed a higher frequency of vertebrae and pelvic girdle elements. Larger fragments (≥ 20 mm) prevailed in the Roman Age, as did the presence of animal bones and blackened bones. We discuss these results by comparing them with sociocultural data of the human communities settled in the Po Valley during the Bronze, Iron, and Roman Ages. In conclusion, our study revealed different funerary rituals in northern Italy among the three periods
Murder on the mountain: author talk with Peter J. Wosh
No full textAuthor talk by Peter J. Wosh on May 5th, 2022, on his book, "Murder on the Mountain: crime, passion, and punishment in gilded age New Jersey.
Mr. Melvin J. Collier, RWWL AUC, June 2011
No full textThis video is a conversation with Mr. Melvin J. Collier. Mr. Collier talks about his book, "From Mississippi to Africa: A Journey of Discovery". Daniel Le, AUC Woodruff Library, is the interviewer
A Tripartite Post-Recession Rebalancing
No full textIn this latest Advance & Rutgers Report, entitled “A Tripartite Post-Recession Rebalancing,” Dean James W. Hughes and Professor Joseph J. Seneca deliver an incisive assessment of the current market conditions and obstacles in the path of our economic recovery. They offer a statistical cautionary tale that the private and public sector need to hear and acknowledge in order for the economy to make continued progress.This report was published as Issue Paper Number 7, November 2011, in Advance & Rutgers Report
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
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