10,098 research outputs found
Muon capture for the front end of a muon collider
We discuss the design of the muon capture front end for a \mu+-\mu- Collider.
In the front end, a proton bunch on a target creates secondary pions that drift
into a capture transport channel, decaying into muons. A sequence of rf
cavities forms the resulting muon beams into strings of bunches of differing
energies, aligns the bunches to (nearly) equal central energies, and initiates
ionization cooling. The muons are then cooled and accelerated to high energy
into a storage ring for high-energy high luminosity collisions. Our initial
design is based on the somewhat similar front end of the International Design
Study (IDS) neutrino factory.Comment: 3 pp. Particle Accelerator, 24th Conference (PAC'11) 28 Mar - 1 Apr
2011: New York, US
Tracking Users across the Web via TLS Session Resumption
User tracking on the Internet can come in various forms, e.g., via cookies or
by fingerprinting web browsers. A technique that got less attention so far is
user tracking based on TLS and specifically based on the TLS session resumption
mechanism. To the best of our knowledge, we are the first that investigate the
applicability of TLS session resumption for user tracking. For that, we
evaluated the configuration of 48 popular browsers and one million of the most
popular websites. Moreover, we present a so-called prolongation attack, which
allows extending the tracking period beyond the lifetime of the session
resumption mechanism. To show that under the observed browser configurations
tracking via TLS session resumptions is feasible, we also looked into DNS data
to understand the longest consecutive tracking period for a user by a
particular website. Our results indicate that with the standard setting of the
session resumption lifetime in many current browsers, the average user can be
tracked for up to eight days. With a session resumption lifetime of seven days,
as recommended upper limit in the draft for TLS version 1.3, 65% of all users
in our dataset can be tracked permanently.Comment: 11 page
Optimization of the Target Subsystem for the New g-2 Experiment
A precision measurement of the muon anomalous magnetic moment, , was previously performed at BNL with a result of 2.2 - 2.7 standard
deviations above the Standard Model (SM) theoretical calculations. The same
experimental apparatus is being planned to run in the new Muon Campus at
Fermilab, where the muon beam is expected to have less pion contamination and
the extended dataset may provide a possible deviation from the SM,
creating a sensitive and complementary bench mark for proposed SM extensions.
We report here on a preliminary study of the target subsystem where the
apparatus is optimized for pions that have favorable phase space to create
polarized daughter muons around the magic momentum of 3.094 GeV/c, which is
needed by the downstream g 2 muon ring.Comment: 4 pp. 3rd International Particle Accelerator Conference (IPAC 2012)
20-25 May 2012, New Orleans, Louisian
Developing Both Commodity and Niche Markets for Cow Nose Ray
Our project was to continue developing a three-tiered market for ray. The market tiers on which some work has already been done are: a high end domestic market with an emphasis on marketing to distributors; a commodity market for the foreign export of container sized loads of ray wings; and a bait market for the parts of the ray not used for human consumption
Developing Both Commodity and Niche Markets for Cow Nose Ray 2007 Final Report
The purpose or our project was to help develop a three-tiered market for Cow Nose Ray
Vedolizumab: an α4β7 integrin antagonist for ulcerative colitis and Crohn’s disease
Ulcerative colitis (UC) and Crohn’s disease (CD) are chronic, relapsing inflammatory bowel diseases associated with significant morbidity. Conventional therapies for these diseases include corticosteroids, aminosalicylates, immunomodulators, and monoclonal antibodies. Over the years tumor necrosis factor (TNF)-α antagonists alone or in combination with other therapies have emerged as the cornerstone of treatment for induction and maintenance of remission of moderate to severe UC and CD. Unfortunately, some patients with moderate to severe UC and CD are unable to attain or maintain remission with TNF-α antagonist treatment. Vedolizumab, a humanized monoclonal antibody, is the first integrin receptor antagonist approved that selectively antagonizes α4β7 gastrointestinal integrin receptors. US Food and Drug Administration approval is for treatment of patients with moderate to severe active UC and CD who have inadequate response with, lost response to, or are intolerant to a TNF-α antagonist or an immunomodulator; or have inadequate response with, are intolerant to, or demonstrate dependence on corticosteroids. When administered according to approved dosing in patients with moderate to severe CD and UC, vedolizumab induces clinical response rates up to 31.4% and 47.1% at week 6, and clinical remission rates up to 39% and 41.8% at week 52, respectively. Serious adverse events reported with vedolizumab include serious infections, malignancies, and anaphylaxis. Since vedolizumab is gastrointestinal selective, to date, it has not shown evidence of causing progressive multifocal leukoencephalopathy; however, postmarketing studies monitoring for this adverse effect are ongoing. Further assessment of vedolizumab earlier in the course of these diseases and in combination with other therapies is warranted
Measuring users\u27 impact to support economic growth through Transportation Asset Management planning
The Moving Ahead for Progress in the 21st Century Act (MAP-21), was enacted by the US Congress to support the economic growth of regions. With this in mind, the state Departments of Transportation (DOT) policies for allocating construction and maintenance funds for infrastructural rehabilitation represent a mechanism to spur economic growth. Economic downturns highlight the importance of a transparent, cost-effective methodology for allocation of scarce resources that provide equity to the entire population of road users. The paper proposes adding social and economic components to the current traffic-based prioritisation method for low-volume, rural bridges in Iowa and evaluates the potential change in the distribution of funding among the state\u27s structurally deficient bridges. The proposed method illustrates the value-added of transportation infrastructure projects to the state\u27s agricultural economy, concluding that the addition of socioeconomic factors to the current decision-making process can increase the net benefit of the investments in low-volume bridges to the state\u27s agricultural economy
Defects and boundary layers in non-Euclidean plates
We investigate the behavior of non-Euclidean plates with constant negative
Gaussian curvature using the F\"oppl-von K\'arm\'an reduced theory of
elasticity. Motivated by recent experimental results, we focus on annuli with a
periodic profile. We prove rigorous upper and lower bounds for the elastic
energy that scales like the thickness squared. In particular we show that are
only two types of global minimizers -- deformations that remain flat and saddle
shaped deformations with isolated regions of stretching near the edge of the
annulus. We also show that there exist local minimizers with a periodic profile
that have additional boundary layers near their lines of inflection. These
additional boundary layers are a new phenomenon in thin elastic sheets and are
necessary to regularize jump discontinuities in the azimuthal curvature across
lines of inflection. We rigorously derive scaling laws for the width of these
boundary layers as a function of the thickness of the sheet
Tourism in Maine Summary Report 1974
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