10,449 research outputs found
Lepton - Chargino Mixing and R-Parity Violating SUSY
We present a study of charged lepton mass matrix diagonalization in R-parity
violating SUSY. The case in which the bilinear couplings have large
values is given special attention.Comment: 7 pages, LaTeX, 1 postscript figure, uses aipproc.sty; presented at
the 21th annual MRST meeting on High-Energy Physics, Ottawa, Canada, 10-12
May 199
Accounting Ethics Education: A Comparison with Buddhist Ethics Education Framework
Accounting educators such as Mintz and Mele have argued about the importance of virtues in moral behavior. Mele presented a conceptual model of moral behavior that integrated professional rules of conduct, moral values, and moral virtues. Moral virtues are defined as “permanent attitudes and interior strength for moral behavior.” A major shortcoming of the Mele’s model is that the model does not provide any discussion on the methodologies facilitating the cultivation of virtues. This paper describes the framework and process of Buddhist ethics education and compares the similarities and differences of the Buddhist ethics education framework with the mainstream accounting ethics education framework. Compared with the mainstream ethics education model, the Buddhist ethics education framework appears to be comprehensive and systematic. In addition, to delineate the constituent factors that contribute to moral behavior, it renders several methodological discussions on how to cultivate moral sentiment, practical wisdom, and transitive and self-mastering virtues. Its systematic nature is exhibited by the line-up or formulation of necessary steps leading to the final achievement of moral behavior. Taken as a whole, the framework provides practitioners with practical guidance for what they need to work on sequentially or simultaneously in the moral development process. We sincerely hope that our discussion and comparison of the framework benefit accounting educators who are concerned with instilling long-term values and virtues into the lives of their students
Attending to Emotional Cues for Drug Abuse: Bridging the Gap Between Clinic and Home Behaviors
Classical conditioning models of addiction provide keys to understanding the vexing discrepancy between substance abuse patients’ desire to abstain when they are in therapy sessions and their tendency to relapse. Experiments using these models demonstrate the power of environmental relapse cues and support clinical approaches, including active exposure, aimed at helping patients recognize and withstand them. Internal cues, including emotions and somatic states such as withdrawal, can trigger urges as powerfully as external cues such as people, places, and things associated with prior abuse. The authors describe a cognitive-behavioral therapy approach that focuses on identifying and actively inducing each patient’s high-risk emotions, then helping him or her develop and practice healthy responses. Clinical trials support the approach for patients with panic disorder who have trouble discontinuing benzodiazepines, and early trials suggest it may be useful for patients addicted to other drugs as well
Recombination dramatically speeds up evolution of finite populations
We study the role of recombination, as practiced by genetically-competent
bacteria, in speeding up Darwinian evolution. This is done by adding a new
process to a previously-studied Markov model of evolution on a smooth fitness
landscape; this new process allows alleles to be exchanged with those in the
surrounding medium. Our results, both numerical and analytic, indicate that for
a wide range of intermediate population sizes, recombination dramatically
speeds up the evolutionary advance
Analytical study of the effect of recombination on evolution via DNA shuffling
We investigate a multi-locus evolutionary model which is based on the DNA
shuffling protocol widely applied in \textit{in vitro} directed evolution. This
model incorporates selection, recombination and point mutations. The simplicity
of the model allows us to obtain a full analytical treatment of both its
dynamical and equilibrium properties, for the case of an infinite population.
We also briefly discuss finite population size corrections
Interferometric Astrometry of Proxima Centauri and Barnard's Star Using Hubble Space Telescope Fine Guidance Sensor 3: Detection Limits for sub-Stellar Companions
We report on a sub-stellar companion search utilizing interferometric
fringe-tracking astrometry acquired with Fine Guidance Sensor 3 (FGS 3) on the
Hubble Space Telescope. Our targets were Proxima Centauri and Barnard's Star.
We obtain absolute parallax values for Proxima Cen pi_{abs} = 0.7687 arcsecond
and for Barnard's Star pi_{abs} = 0.5454 arcsecond.
Once low-amplitude instrumental systematic errors are identified and removed,
our companion detection sensitivity is less than or equal to one Jupiter mass
for periods longer than 60 days for Proxima Cen. Between the astrometry and the
radial velocity results we exclude all companions with M > 0.8M_{Jup} for the
range of periods 1 < P < 1000 days. For Barnard's Star our companion detection
sensitivity is less than or equal to one Jupiter mass for periods long er than
150 days. Our null results for Barnard's Star are consistent with those of
Gatewood (1995).Comment: 35 pages, 13 figures, to appear in August 1999 A
Irreversible Performance of a Quantum Harmonic Heat Engine
The unavoidable irreversible losses of power in a heat engine are found to be
of quantum origin. Following thermodynamic tradition a model quantum heat
engine operating by the Otto cycle is analyzed. The working medium of the model
is composed of an ensemble of harmonic oscillators. A link is established
between the quantum observables and thermodynamical variables based on the
concept of canonical invariance. These quantum variables are sufficient to
determine the state of the system and with it all thermodynamical variables.
Conditions for optimal work, power and entropy production show that maximum
power is a compromise between the quasistatic limit of adiabatic following on
the compression and expansion branches and a sudden limit of very short time
allocation to these branches. At high temperatures and quasistatic operating
conditions the efficiency at maximum power coincides with the endoreversible
result. The optimal compression ratio varies from the square root of the
temperature ratio in the quasistatic limit where their reversibility is
dominated by heat conductance to the temperature ratio to the power of 1/4 in
the sudden limit when the irreversibility is dominated by friction. When the
engine deviates from adiabatic conditions the performance is subject to
friction. The origin of this friction can be traced to the noncommutability of
the kinetic and potential energy of the working medium.Comment: 25 pages, 7 figures. Revision added explicit heat-transfer expression
and extended the discussion on the quantum origin of frictio
Does d-cycloserine facilitate the effects of homework compliance on social anxiety symptom reduction?
BACKGROUND: Prior studies examining the effect of d-cycloserine (DCS) on homework compliance and outcome in cognitive-behavior therapy (CBT) have yielded mixed results. The aim of this study was to investigate whether DCS facilitates the effects of homework compliance on symptom reduction in a large-scale study for social anxiety disorder (SAD). METHODS: 169 participants with generalized SAD received DCS or pill placebo during 12-session exposure-based group CBT. Improvements in social anxiety were assessed by independent raters at each session using the Liebowitz social anxiety scale (LSAS). RESULTS: Controlling for LSAS at the previous session, and irrespective of treatment condition, greater homework compliance in the week prior related to lower LSAS at the next session. However, DCS did not moderate the effect of homework compliance and LSAS, LSAS on homework compliance, or the overall augmenting effect of DCS on homework compliance. Furthermore, LSAS levels were not predictive of homework compliance in the following week. CONCLUSION: The findings support the general benefits of homework compliance on outcome, but not a DCS-augmenting effect. The comparably small number of DCS-enhanced sessions in this study could be one reason for the failure to find a facilitating effect of DCS
Photometry of Proxima Centauri and Barnard's Star Using HST Fine Guidance Sensor 3: A Search for Periodic Variations
We have observed Proxima Centauri and Barnard's Star with Hubble Space
Telescope Fine Guidance Sensor 3. Proxima Centauri exhibits small-amplitude,
periodic photometric variations. Once several sources of systematic photometric
error are corrected, we obtain 2 milli-magnitude internal photometric
precision. We identify two distinct behavior modes over the past four years:
higher amplitude, longer period; smaller amplitude, shorter period. Within the
errors one period (P ~ 83d) is twice the other. Barnard's Star shows very weak
evidence for periodicity on a timescale of approximately 130 days. If we
interpret these periodic phenomena as rotational modulation of star spots, we
identify three discrete spots on Proxima Cen and possibly one spot on Barnard's
Star. We find that the disturbances change significantly on time scales as
short as one rotation period.Comment: 39 pages, 17 figure
Chromosome Numbers In Compositae Vii: Astereae Iii
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/142139/1/ajb207543.pd
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