958 research outputs found
Memory Enhancement by a Semantically Unrelated Emotional Arousal Source Induced After Learning
It has been well established that moderate physiological or emotional arousal modulates memory. However, there is some controversy about whether the source of arousal must be semantically related to the information to be remembered. To test this idea, 35 healthy young adult participants learned a list of common nouns and afterward viewed a semantically unrelated, neutral or emotionally arousing videotape. The tape was shown after learning to prevent arousal effects on encoding or attention, instead influencing memory consolidation. Heart rate increase was significantly greater in the arousal group, and negative affect was significantly less reported in the non-arousal group after the video. The arousal group remembered significantly more words than the non-arousal group at both 30 min and 24 h delays, despite comparable group memory performance prior to the arousal manipulation. These results demonstrate that emotional arousal, even from an unrelated source, is capable of modulating memory consolidation. Potential reasons for contradictory findings in some previous studies, such as the timing of âdelayedâ memory tests, are discussed
Dislike: Facebook\u27s Anticompetitive Monopoly on Social Media and Why U.S. Antitrust Laws Must Adapt to the Technological Era
Although Facebook started as a way to connect with college classmates, it has grown into one of the largest technology companies in the world. Facebook is no longer solely a way to connect with classmates. Instead, it is the powerhouse of social networks and dominates the online advertising business. Facebook has grown at an unprecedented rateâacquiring businesses and gathering usersâ privacy along the wayâpartially because of the failure of U.S. antitrust laws to adequately protect against anticompetitive and monopolistic behavior in the technological arena.
Historically, antitrust laws have used the consumer welfare standard to determine if entities are engaging in anticompetitive and monopolistic behavior. However, as technology continues to develop in the twenty-first century, the way consumer welfare is measured must be revised. This Comment outlines the development and history of antitrust laws to illustrate how the current antitrust model fails to adequately capture anticompetitive and monopolistic behavior in the technological arena. Using Facebook as a case study, this Comment shows how Big Tech harms consumers in ways not traditionally thought ofâloss of control over data and privacy, lack of innovation, and decline in business startupsâand outlines ways Congress and courts must approach U.S. antitrust laws to better encapsulate Big Tech. These methods promote preserving the competitive process and market structure while giving consumers a voice in the protection of their privacy and data
Epoxy/ graphene nanocomposites â processing and properties: a review
Graphene has recently attracted significant academic and industrial interest because of its excellent performance in mechanical, electrical and thermal applications. Graphene can significantly improve physical properties of epoxy at extremely small loading when incorporated appropriately. Herein, the structure, preparation and properties of epoxy/graphene nanocomposites are reviewed in general, along with detailed examples drawn from the key scientific literature. The modification of graphene and the utilization of these materials in the fabrication of nanocomposites with different processing methods have been explored. This review has been focused on the processing methods and mechanical, electrical, thermal, and fire retardant properties of the nanocomposites. The synergic effects of graphene and other fillers in epoxy matrix have been summarised as well
Quantum Faraday Effect in Double-Dot Aharonov-Bohm Ring
We investigate Faraday's law of induction manifested in the quantum state of
Aharonov-Bohm loops. In particular, we propose a flux-switching experiment for
a double-dot AB ring to verify the phase shift induced by Faraday's law. We
show that the induced {\em Faraday phase} is geometric and nontopological. Our
study demonstrates that the relation between the local phases of a ring at
different fluxes is not arbitrary but is instead determined by Faraday's
inductive law, which is in strong contrast to the arbitrary local phase of an
Aharonov-Bohm ring for a given flux.Comment: Submitted to Phys. Rev. Let
Alternative Mathematical Technique to Determine LS Spectral Terms
We presented an alternative computational method for determining the
permitted LS spectral terms arising from electronic configurations. This
method makes the direct calculation of LS terms possible. Using only basic
algebra, we derived our theory from LS-coupling scheme and Pauli exclusion
principle. As an application, we have performed the most complete set of
calculations to date of the spectral terms arising from electronic
configurations, and the representative results were shown. As another
application on deducing LS-coupling rules, for two equivalent electrons, we
deduced the famous Even Rule; for three equivalent electrons, we derived a new
simple rule.Comment: Submitted to Phys. Rev.
High-fidelity simulations of CdTe vapor deposition from a new bond-order potential-based molecular dynamics method
CdTe has been a special semiconductor for constructing the lowest-cost solar
cells and the CdTe-based Cd1-xZnxTe alloy has been the leading semiconductor
for radiation detection applications. The performance currently achieved for
the materials, however, is still far below the theoretical expectations. This
is because the property-limiting nanoscale defects that are easily formed
during the growth of CdTe crystals are difficult to explore in experiments.
Here we demonstrate the capability of a bond order potential-based molecular
dynamics method for predicting the crystalline growth of CdTe films during
vapor deposition simulations. Such a method may begin to enable defects
generated during vapor deposition of CdTe crystals to be accurately explored
Single-qubit gates and measurements in the surface acoustic wave quantum computer
In the surface acoustic wave quantum computer, the spin state of an electron
trapped in a moving quantum dot comprises the physical qubit of the scheme. Via
detailed analytic and numerical modeling of the qubit dynamics, we discuss the
effect of excitations into higher-energy orbital states of the quantum dot that
occur when the qubits pass through magnetic fields. We describe how
single-qubit quantum operations, such as single-qubit rotations and
single-qubit measurements, can be performed using only localized static
magnetic fields. The models provide useful parameter regimes to be explored
experimentally when the requirements on semiconductor gate fabrication and the
nanomagnetics technology are met in the future.Comment: 13 pages, 10 figures, submitted to Phys. Rev.
Elementary Forms of the Metaphorical Life : Tropes at Work in Durkheimâs Theory of the Religious
Peer reviewedPostprin
TURBULENCE IN MOLECULAR CLOUDS
We generate random Gaussian turbulent velocity fields with a Kolmogorov
spectrum and use these to obtain synthetic line-of-sight velocity profiles. The
profiles are found to be similar to line profiles observed in molecular clouds.
We suggest methods for analysing measured line profiles to test whether they
might arise from Gaussian Kolmogorov turbulence.Comment: accepted in ApJ, compressed postscript, figures not included.
Complete preprint available at http://ucowww.ucsc.edu/~dubinski/home.html or
by request to [email protected]
- âŠ