241 research outputs found
Shadows of the Planck Scale: The Changing Face of Compactification Geometry
By studying the effects of the shape moduli associated with toroidal
compactifications, we demonstrate that Planck-sized extra dimensions can cast
significant ``shadows'' over low-energy physics. These shadows can greatly
distort our perceptions of the compactification geometry associated with large
extra dimensions, and place a fundamental limit on our ability to probe the
geometry of compactification simply by measuring Kaluza-Klein states. We also
discuss the interpretation of compactification radii and hierarchies in the
context of geometries with non-trivial shape moduli. One of the main results of
this paper is that compactification geometry is effectively renormalized as a
function of energy scale, with ``renormalization group equations'' describing
the ``flow'' of geometric parameters such as compactification radii and shape
angles as functions of energy.Comment: 7 pages, LaTeX, 2 figure
Some biological parameters of Sympiesis striatipes (Hym.: Eulophidae), an ectoparasitoid of the citrus leafminer Phyllocnistis citrella (Lep.: Gracillariidae)
The biological parameters of Sympiesis striatipes Ashmead, one of the most abundant hymenopterous ectoparasitoid of Phyllocnistis citrella Stainton in Ehime province of Japan, were studied under laboratory and field conditions. The mean immature developmental time and adult longevity at different temperatures (22 to 31°C), 50-70% RH and 12L: 12D photoperiod decreased as the temperature increased, and females survived longer than males. Offspring sex ratio from females provided with males was 84.7% males and 15.3% females. Presumably mated females began oviposition 2-3 days after emergence and continued up to 39 days. Each female laid a mean of 123.4 ± 13.97, and longevity reached 33.8 ± 1.5 days at 27 ± 1°C, 50-70% RH and 12L: 12D photoperiod. The intrinsic rate of natural increase (rm) was 0.312. Host feeding or stinging without oviposition killed 44.7 ± 4.2 host larvae per female parasitoid. Seventy five point eight percent of eggs were laid on third instar larva of host and the remainder on the prepupa. Under field conditions, superparasitism on the third instar larvae was 9.2% (n = 200) and up to 7 eggs per host were recorded. Under superparasitism lethal competition (n = 40), one adult parasitoid per host emerged from 87.5% of the samples and two adult parasitoids per host emerged from the rest. Superparasitism on prepupa was rare. The sex ratio (M: F) of the parasitoid oviposited on the third instar larvae of host and pupae was 2.2: 1.0, and 1.3: 3.0, respectively
The Quality and Outcomes of Care Provided to Patients with Cirrhosis by Advanced Practice Providers
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/153696/1/hep30695.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/153696/2/hep30695_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/153696/3/hep30695-sup-0001-TableS1-S6.pd
The effects of expression of different microRNAs on insulin secretion and diabetic nephropathy progression
MicroRNAs (miRNAs) have recently become well-known efficacious biomarkers for the diagnosis of diabetic nephropathy (DN). MiRNAs, short noncoding RNAs, are posttranscriptional regulators of gene expression, which regulate several biological cell functions, including insulin production and secretion, as well as insulin resistance in tissues. Today, the focus of the medical world is centered on the role of miRNAs as mediators for different diseases, such as DN and end-stage renal diseases (ESRD). MiRNAs are stable and detectable in human biological fluids, so their detection for early diagnosis of different diseases is highly sensitive and specific. Previous reports have shown that the alteration of miRNA profiles significantly correlates with specific stages of DN, kidney fibrosis, and renal dysfunction. This review was aimed at assessing the pathway of different miRNA expressions responsible for insulin secretion disorder and DN progression. © 2018 Wiley Periodicals, Inc
A solution to the mu problem in the presence of a heavy gluino LSP
In this paper we present a solution to the problem in an SO(10)
supersymmetric grand unified model with gauge mediated and D-term supersymmetry
breaking. A Peccei-Quinn symmetry is broken at the messenger scale GeV and enables the generation of the term. The boundary
conditions defined at lead to a phenomenologically acceptable version of
the minimal supersymmetric standard model with novel particle phenomenology.
Either the gluino or the gravitino is the lightest supersymmetric particle
(LSP). If the gravitino is the LSP, then the gluino is the next-to-LSP (NLSP)
with a lifetime on the order of one month or longer. In either case this heavy
gluino, with mass in the range 25 - 35 GeV, can be treated as a stable particle
with respect to experiments at high energy accelerators. Given the extensive
phenomenological constraints we show that the model can only survive in a
narrow region of parameter space resulting in a light neutral Higgs with mass
GeV and . In addition the lightest stop
and neutralino have mass GeV and GeV,
respectively. Thus the model will soon be tested. Finally, the invisible axion
resulting from PQ symmetry breaking is a cold dark matter candidate.Comment: 30 pages, 9 figure
On the support of general local cohomology modules and filter regular sequences
Let R be a commutative Noetherian ring with non-zero identity and a an ideal of R. In the present paper, we examine the question whether the support of Hn a (N;M) must be closed in Zariski topology, where Hn a (N;M) is the nth general local cohomology module of nitely generated R-modules M and N with respect to the ideal a
An Updated Description of Heavy-Hadron Interactions in Geant-4
Exotic stable massive particles (SMP) are proposed in a number of scenarios
of physics beyond the Standard Model. It is important that LHC experiments are
able both to detect and extract the quantum numbers of any SMP with masses
around the TeV scale. To do this, an understanding of the interactions of SMPs
in matter is required. In this paper a Regge-based model of R-hadron scattering
is extended and implemented in Geant-4. In addition, the implications of
-hadron scattering for collider searches are discussed
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