1,894 research outputs found
The Hausdorff dimension of the set of dissipative points for a Cantor-like model set for singly cusped parabolic dynamics
In this paper we introduce and study a certain intricate Cantor-like set
contained in unit interval. Our main result is to show that the set itself,
as well as the set of dissipative points within , both have Hausdorff
dimension equal to 1. The proof uses the transience of a certain non-symmetric
Cauchy-type random walk
Photoproduction of single inclusive jets at future ep colliders in next-to-leading order QCD
A next-to-leading order QCD calculation for single-inclusive jet
photoproduction in unpolarized and longitudinally polarized lepton-hadron
collisions is presented which consistently includes ``direct'' and ``resolved''
photon contributions. The computation is performed within the ``small-cone
approximation'' in a largely analytical form. Phenomenological aspects of jet
production at future ep colliders such as the CERN-LHeC and the polarized
BNL-eRHIC are discussed, placing particular emphasis on the perturbative
stability of the predictions and the possibility to constrain the parton
content of the photon.Comment: 17 pages, 8 figure
Longitudinally Polarized Photoproduction of Inclusive Hadrons Beyond the Leading Order
We present a complete next-to-leading order QCD calculation for
single-inclusive large-pT hadron production in longitudinally polarized
lepton-nucleon collisions, consistently including ``direct'' and ``resolved''
photon contributions. This process could be studied experimentally at a future
polarized lepton-proton collider like eRHIC at BNL. We examine the sensitivity
of such measurements to the so far completely unknown parton content of
circularly polarized photons.Comment: 15 pages, 7 eps figure
Characterization of Bovine Osteoclasts on an Ionomeric Cement In Vitro
Primary bovine osteoclasts were obtained by an outgrowth method from bovine periosteum and cultured for 7 days on an ionomeric cement for biomaterial testing. Osteoclasts cultured on slices of bovine bone and on glass microscope cover-slides served as a control. The cells were characterised as osteoclasts by a number of tests. Osteoclasts showed positive staining for tartrate resistant acid phosphatase and reactivity with the antibodies 13C2 and 23C6, which react with the alphachain of the vitronectin receptor. Addition of salmon calcitonin to the culture medium led to sudden cessation of lamellipodial activity. The cells resorbed bone by making pits. In mixed cultures with osteoblasts, the morphology of the osteoclasts on the smooth ionomeric cement surface was comparable to the one on glass cover-slides, revealing broad cytoplasmatic extensions on the material. Acridine orange staining demonstrated viability of cells until the end of the culture period and increased acidification after parathyroid hormone (PTH) stimulation. Scanning electron microscopy did not reveal erosion of the material by osteoclasts. No signs of aluminium toxicity on osteoclasts could be detected during the 7 day culture period, although an increased uptake of aluminium into the cell was demonstrated
Spin structure function g_1 at low x: status and plans
A brief review of measurements and expectations concerning the spin structure
function g_1 of the nucleon at low values of the scaling variable x is given.Comment: 4 pages, 3 figures. Invited talk presented at the ``International
Workshop on the Spin Structure of the Proton and Polarized Collider
Physics'', ECT*, Trento, Italy, July 23-28, 200
Mosaic vs. Single Image Analysis with Confocal Microscopy of the Corneal Nerve Plexus for Diagnosis of Early Diabetic Peripheral Neuropathy
The assessment of the corneal nerve fibre plexus with corneal confocal microscopy (CCM) is an upcoming but still experimental method in the diagnosis of early stage diabetic peripheral neuropathy (DPN). Using an innovative imaging technique—Heidelberg Retina Tomograph equipped with the Rostock Cornea Module (HRT-RCM) and EyeGuidance module (EG)—we were able to look at greater areas of subbasal nerve plexus (SNP) in order to increase the diagnostic accuracy. The aim of our study was to evaluate the usefulness of EG instead of single image analysis in diagnosis of early stage DPN
An Organic Metal/Silver Nanoparticle Finish on Copper for Efficient Passivation and Solderability Preservation
For the first time, a complex formed by polyaniline (in its organic metal form) and silver has been deposited on copper in nanoparticulate form. When depositing on Cu pads of printed circuit boards it efficiently protects against oxidation and preserves its solderability. The deposited layer has a thickness of only nominally 50 nm, containing the Organic Metal (conductive polymer), polyaniline, and silver. With >90% (by volume), polyaniline (PAni) is the major component of the deposited layer, Ag is present equivalent to a 4 nm thickness. The Pani–Ag complex is deposited on Cu in form of about 100 nm small particles. Morphology, electrochemical characteristics, anti-oxidation and solderability results are reported
Longitudinally Polarized Photoproduction of Inclusive Hadrons at Fixed-Target Experiments
We present a detailed phenomenological study of spin-dependent
single-inclusive high-p_T hadron photoproduction with particular emphasis on
the kinematics relevant for the Compass and Hermes fixed-target experiments. We
carefully examine the theoretical uncertainties associated with the only
moderate transverse momenta accessible in such measurements and analyze the
sensitivity of the relevant spin asymmetries to the gluon polarization in the
nucleon as well as to the completely unknown parton content of circularly
polarized photons.Comment: 12 pages, 14 figures; final version to appear in EPJC; comparison to
E155 data and references adde
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