10,487 research outputs found
The Generic Supersymmetric Standard Model as the Complete Theory of Supersymmetry without R-parity
The generic supersymmetric standard model is a model built from a
supersymmetrized standard model field spectrum the gauge symmetries only. The
popular minimal supersymmetric standard model differs from the generic version
in having R-parity imposed by hand. We review an efficient formulation of the
model in which all the admissible R-parity violating terms are incorporated
without bias. The model gives many new interesting R-parity violating
phenomenological features only started to be studied recently. Some of our
recent results will be discussed, including newly identified 1-loop
contributions to neutrino masses and electric dipole moments of neutron and
electron. This is related to the largely overlooked R-parity violating
contributions to squark and slepton mixings, which we also present in detail.Comment: 10 pages latex using espcrc2.sty (included) with a latex table and 3
eps- figure files incoporated, typos in a couple of expressions fixe
YOUNG COLLEGE STUDENTSâ PERCEPTION OF DINESERV: A STUDY OF ON-CAMPUS DINING IN THE USA
Purpose â The purpose of this research is to better understand why college students in
the USA eat on-campus. Also, this research aims to compare highly satisfied and low
satisfied groups in terms of their on-campus dining experiences and behaviors and to
understand what values college students are currently satisfied with and what they expect
from their on-campus dining.
Design â A survey design was implemented in this study. The sample for this research
study is any college students who have eaten at on-campus dining facilities within the
last 3 months.
Methodology â Cluster analysis, correlation, and t-test were utilized for data analysis.
The twou0002step clusters method was used to cluster groups based on the mean values of
DINESERV.
Approach â The validity of DINESERV for on-campus dining settings was examined, as well
as examining the behavior and perception of Generation Y and Z on on-campus dining.
Findings â In both clusters, Assurance was the factor with the highest correlation
coefficient value, while Tangible ranked last among the five DINESERV factors. The other
dimensions of DINESERV were also very important to the young college students, as
indicated by the high correlation coefficients.
Originality of the research â This research examines the validity of DINESERV in
on-campus dining settings in the United States. The uniqueness of this study lies in the
sample: young college students, Generation Y and Z
PCC Framework for Program-Generators
In this paper, we propose a proof-carrying code framework for program-generators. The enabling technique is abstract parsing, a static string analysis technique, which is used as a component for generating and validating certificates. Our framework provides an efficient solution for certifying program-generators whose safety properties are expressed in terms of the grammar representing the generated program. The fixed-point solution of the analysis is generated and attached with the program-generator on the code producer side. The consumer receives the code with a fixed-point solution and validates that the received fixed point is indeed a fixed point of the received code. This validation can be done in a single pass
Pituitary Adenylate Cyclase-Activating Polypeptide Orchestrates Neuronal Regulation Of The Astrocytic Glutamate-Releasing Mechanism System x\u3csub\u3ec\u3c/sub\u3e\u3csup\u3eâ\u3c/sup\u3e
Glutamate signaling is achieved by an elaborate network involving neurons and astrocytes. Hence, it is critical to better understand how neurons and astrocytes interact to coordinate the cellular regulation of glutamate signaling. In these studies, we used rat cortical cell cultures to examine whether neurons or releasable neuronal factors were capable of regulating system xc-(Sxc), a glutamate-releasing mechanism that is expressed primarily by astrocytes and has been shown to regulate synaptic transmission. We found that astrocytes cultured with neurons or exposed to neuronal-conditioned media displayed signiïŹcantly higher levels of Sxc activity. Next, we demonstrated that the pituitary adenylate cyclase-activating polypeptide (PACAP) may be a neuronal factor capable of regulating astrocytes. In support, we found that PACAP expression was restricted to neurons, and that PACAP receptors were expressed in astro-cytes. Interestingly, blockade of PACAP receptors in cultures comprised of astrocytes and neurons signiïŹcantly decreased Sxc activity to the level observed in puriïŹed astrocytes, whereas application of PACAP to puriïŹed astrocytes increased Sxc activity to the level observed in cultures comprised of neurons and astrocytes. Collectively, these data reveal that neurons coordinate the actions of glutamate-related mechanisms expressed by astrocytes, such as Sxc, a process that likely involves PACAP
One-loop Neutron Electric Dipole Moment from Supersymmetry without R-parity
We present a detailed analysis together with exact numerical calculations on
one-loop contributions to neutron electric dipole moment from supersymmetry
without R-parity, focusing on the gluino, chargino, and neutralino
contributions. Apart from the neglected family mixing among quarks, complete
formulae are given for the various contributions, through the quark dipole
operators, to which the present study is restricted. We discuss the structure
and main features of the R-parity violating contributions and the interplay
between the R-parity conserving and violating parameters. In particular, the
parameter combination , under the optimal
parametrization adopted, is shown to be solely responsible for the R-parity
violating contributions in the supersymmetric loop diagrams. While
could bear a complex phase, the latter is not
necessary to have a R-parity violating contribution.Comment: 43 pages Revtex with 15 eps- and 4 ps- figure files incoporated;
proofread version to be published in Phys. Rev.
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