2,567 research outputs found
Search for Scalar Leptoquarks with polarized protons (and neutrons) at HERA and future Machines
The effects of Scalar Leptoquarks in various channels have been analysed for
the HERA collider and also for an eventual new machine running at higher
energies. We emphasize the relevance of polarized beams.Comment: Latex file, 3 pages and 3 ps fig. Need style files :
twoside,fleqn,espcrc2,epsfig. To appear in the proceedings of the DIS99
Workshop, DESY-Zeuthen, Germany, April 199
Discovery Potential for New Phenomena
We examine the ability of future facilities to discover and interpret
non-supersymmetric new phenomena. We first explore explicit manifestations of
new physics, including extended gauge sectors, leptoquarks, exotic fermions,
and technicolor models. We then take a more general approach where new physics
only reveals itself through the existence of effective interactions at lower
energy scales. [Summary Report of the New Phenomena Working Group. To appear in
the Proceedings of the 1996 DPF/DPB Summer Study on New Directions for High
Energy Physics - Snowmass96, Snowmass, CO, 25 June - 12 July 1996.]Comment: 18 pages, LaTex2
B(Ds^+ -> l^+ nu) and the Decay Constant f_(D_s^+)
I report final CLEO-c results on the purely leptonic decays of the D_s^+ ->
l^+ nu, for the cases when l^+ is a mu^+ or tau^+, when it decays into pi^+
anti-nu, using 314/pb of data at 4.170 GeV. I also include preliminary results
from the tau^+ -> e^+ nu anti-nu channel using 195/pb. Combining both we
measure f_{D_s}= 275 +/- 10 +/- 5 MeV, and f_{D_s^+}/{f_{D^+}=1.24 +/- 0.10 =/-
0.03 .Comment: Presented at "The 2007 Europhysics Conference on High Energy
Physics," Manchester, England, 19-25 July 2007, to appear in the proceedings.
Three pages, 1 figur
Physical degrees of freedom in stabilized brane world models
We consider brane world models with interbrane separation stabilized by the
Goldberger-Wise scalar field. For arbitrary background, or vacuum
configurations of the gravitational and scalar fields in such models, we
construct the second variation Lagrangian, study its gauge invariance, find the
corresponding equations of motion and decouple them in a suitable gauge. We
also derive an effective four-dimensional Lagrangian for such models, which
describes the massless graviton, a tower of massive gravitons and a tower of
massive scalars. It is shown that for a special choice of the background
solution the masses of the graviton excitations may be of the order of a few
TeV, the radion mass of the order of 100 GeV, the inverse size of the extra
dimension being tens of GeV. In this case the coupling of the radion to matter
on the negative tension brane is approximately the same as in the unstabilized
model with the same values of the fundamental five-dimensional energy scale and
the interbrane distance.Comment: 17 pages, LaTeX, corrected typos, amended the normalization constants
of the scalar modes and their coupling constants to matte
Celecoxib decreases prostaglandin E\u3csub\u3e2\u3c/sub\u3e concentrations in nipple aspirate fluid from high risk postmenopausal women and women with breast cancer
Background
Celecoxib inhibits PGE2 production in cancerous tissue. We previously reported that PGE2 levels in nipple aspirate fluid (NAF) and plasma were not decreased in women at increased breast cancer risk who received celecoxib 200 mg twice daily (bid). The endpoints of the current study were to determine if a short course of celecoxib 400 mg bid would decrease PGE2 levels in women 1) at increased breast cancer risk, and 2) with established breast cancer.
Methods
NAF and plasma samples were collected before, 2 weeks after taking celecoxib 400 mg bid, and two weeks after washout from 26 women who were at increased breast cancer risk. From 13 women with newly diagnosed breast cancer, NAF from the incident breast and plasma were collected before and on average 2 weeks after taking celecoxib. Additionally, in nine of the 13 women with breast cancer, NAF was collected from the contralateral breast.
Results
No consistent change in NAF or plasma PGE2 levels was noted in high risk premenopausal women. NAF PGE2 levels decreased after celecoxib administration in postmenopausal high risk women (p = 0.02), and in both the NAF (p = 0.02) and plasma (p = 0.03) of women with breast cancer.
Conclusion
Celecoxib 400 mg bid taken on average for 2 weeks significantly decreased NAF, but not plasma, PGE2 levels in postmenopausal high risk women, and decreased both NAF and plasma PGE2 levels in women with newly diagnosed breast cancer. PGE2 levels may predict celecoxib breast cancer prevention and treatment efficacy. Our observations are preliminary, and larger studies to confirm and extend these findings are warranted
The encounter of art and language in Hrabanus Maurus’ In honorem sanctae crucis and the Communication of philosophical and theological content
2011 - 2012The In honorem sanctae crucis of Hrabanus Maurus consists of 28 carmina figurata, in which text and image are
interwoven into multiple complex unities. This work, rather than employing text and image in parallel, uses the visual
level to create multiple levels of language, while the visual level in turn is constituted by the linguistic levels. Each
carmen relates some aspect of the universe to the cross of Christ. They combine, thus, into a structured whole devoted
to honoring the cross and displaying it as the fundamental structuring principle of the universe. My thesis analyzes
the complex internal structure of this work, considers how it communicates with its diverse audiences, and attempts to
elicit its philosophical and theological content. Christ, as creator and totality of being, redeems all creation, opening
the way to Heaven for the saved, while the cross itself becomes the metaphysical, metacosmic and metatemporal
principle and the means through which Christ sends grace into the world. The correct response of angels and men to
this event is ever-lasting praise, which the In honorem recommends, defends, justifies and embodies. [edited by author]L'In honorem sanctae crucis di Rabano Mauro consiste di 28 carmina figurata, nei quali diversi testi ed immagine
sono intrecciati in varie unità complesse. L'opera non mette immagine e testo in parallelo, come di solito, ma invece
usa il livello visivo per creare multiplici livelli di linguaggio, mientre il livello visivo stesso è composto dai livelli
linguistici. Ciascun carmen mette un aspetto dell'universo in relazione con la croce di Cristo. Si rigiungono dunque
verso una totalità strutturata che è dedicata all'onore della croce e la mostra come il principio strutturante
fondamentale dell'universo. La mia tesi analissa la struttura interna complessa dell'opera, esamina come essa
communica con i diversi lettori e tenta esplicitare il contenuto filosofico e teologico. Cristo, creatore e totalità
dell'essere, ridime tutto il creato, aprendo così la via al cielo per i salvati, mientre la croce stessa diviene principio
metafisico, metacosmico e metatemporale e il mezzo per cui Cristo manda grazie nel mondo. La risposta corretta
degli angeli e degli uomini è la lode perpetua, che l'In honorem ricommanda, difende, giustifica e incorpora. [a cura dell'autore]XI n.s
From an automated flight-test management system to a flight-test engineer's workstation
The capabilities and evolution is described of a flight engineer's workstation (called TEST-PLAN) from an automated flight test management system. The concept and capabilities of the automated flight test management systems are explored and discussed to illustrate the value of advanced system prototyping and evolutionary software development
pMSSM Benchmark Models for Snowmass 2013
We present several benchmark points in the phenomenological Minimal
Supersymmetric Standard Model (pMSSM). We select these models as experimentally
well-motivated examples of the MSSM which predict the observed Higgs mass and
dark matter relic density while evading the current LHC searches. We also use
benchmarks to generate spokes in parameter space by scaling the mass parameters
in a manner which keeps the Higgs mass and relic density approximately
constant.Comment: 10 pages, 6 figure
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