617 research outputs found
ReconïŹgurable Computing and Hardware/Software Codesign
none3Article ID 731830 - EditorialPLAKS T. P; SANTAMBROGIO M. D; D. SCIUTOPLAKS T., P; Santambrogio, MARCO DOMENICO; Sciuto, Donatell
A protocol for qualitative and quantitative measurement of endosomal processing using hot spot analysis
A detailed quantification of antigen processing by endosomal compartments provides important information on the pattern of protein fragmentation. Here, we describe a protocol that combines gradient purified endosomes, incubated with antigens, followed by hot spot analysis of MS/MS-sequenced peptides. The analysis identifies differences in endosomal antigen processing by dendritic cells under diverse experimental conditions. For complete details on the use and execution of this protocol, please refer to Clement et al. (2021)
Approaching the transit time limit for high-precision spectroscopy on metastable CO around 6 ÎŒm
We present a high-resolution spectroscopy experiment, based on a molecular beam setup, which pushes the measured line width close to the transit time limit, on the order of 100 kHz
The heart of a convex body
We investigate some basic properties of the {\it heart}
of a convex set It is a subset of
whose definition is based on mirror reflections of euclidean
space, and is a non-local object. The main motivation of our interest for
is that this gives an estimate of the location of the
hot spot in a convex heat conductor with boundary temperature grounded at zero.
Here, we investigate on the relation between and the
mirror symmetries of we show that
contains many (geometrically and phisically) relevant points of
we prove a simple geometrical lower estimate for the diameter of
we also prove an upper estimate for the area of
when is a triangle.Comment: 15 pages, 3 figures. appears as "Geometric Properties for Parabolic
and Elliptic PDE's", Springer INdAM Series Volume 2, 2013, pp 49-6
Isometric Embedding of BPS Branes in Flat Spaces with Two Times
We show how non-near horizon p-brane theories can be obtained from two
embedding constraints in a flat higher dimensional space with 2 time
directions. In particular this includes the construction of D3 branes from a
flat 12-dimensional action, and M2 and M5 branes from 13 dimensions. The
worldvolume actions are determined by constant forms in the higher dimension,
reduced to the usual expressions by Lagrange multipliers. The formulation
affords insight in the global aspects of the spacetime geometries and makes
contact with recent work on two-time physics.Comment: 29 pages, 10 figures, Latex using epsf.sty and here.sty; v2:
reference added and some small correction
Open-String Actions and Noncommutativity Beyond the Large-B Limit
In the limit of large, constant B-field (the ``Seiberg-Witten limit''), the
derivative expansion for open-superstring effective actions is naturally
expressed in terms of the symmetric products *n. Here, we investigate
corrections around the large-B limit, for Chern-Simons couplings on the brane
and to quadratic order in gauge fields. We perform a boundary-state computation
in the commutative theory, and compare it with the corresponding computation on
the noncommutative side. These results are then used to examine the possible
role of Wilson lines beyond the Seiberg-Witten limit. To quadratic order in
fields, the entire tree-level amplitude is described by a metric-dependent
deformation of the *2 product, which can be interpreted in terms of a deformed
(non-associative) version of the Moyal * product.Comment: 30 pages, harvma
Superstrings and D-branes in A Plane Wave
We carefully analyze the supersymmetry algebra of closed strings and open
strings in a type IIB plane wave background. We use eight component chiral
spinors, SO(8) Majorana-Weyl spinors, in light-cone gauge to provide a useful
basis of string field theory calculation in the plane wave. We consider the two
classes of D-branes, -branes, and give a worldsheet derivation of
conserved supercurrents for all half BPS D-branes preserving 16 supersymmetries
in the type IIB plane wave background. We exhaustively provide the
supersymmetry algebra of the half BPS branes as well. We also point out that
the supersymmetry algebra distinguishes the two SO(4) directions with relative
sign which is consistent with the Z_2 symmetry of the string action.Comment: v4: 28 pages, Latex, Worldsheet derivation of conserved supercurrents
for all half BPS D-branes newly added, improved presentation and typo
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