7,923 research outputs found
Self-consistent analysis of hadron production in and collisions at mid-rapidity
The self-consistent approach based on similarity of inclusive spectra of
hadrons produced in and collisions is reviewed. This approach allows
us to describe rather well the ratio of proton to anti-proton yields in
collisions as a function of the initial energy at a wide range from a few GeV
to a few TeV. We suggest its modification due to the quark-gluon dynamics to
describe the inclusive spectra of hadrons produced in collision as a
function of the transverse momentum at mid-rapidity. The extension of
this approach to analyze the pion -spectra produced in collision at
high and middle energies and mid-rapidity is given. The satisfactory
description of experimental data on these spectra in and collisions
within the offered approach is shown.Comment: 15 pages, 9 figures. arXiv admin note: substantial text overlap with
arXiv:1504.0784
Mid-rapidity dependence of hadron production in and collisions
The calculation of inclusive spectra of pions produced in and
collisions as a function of rapidity is presented within the
self-similarity approach. It is shown that at not large rapidities one can
obtain the analytical form of the self-similarity function
dependent of and hadron transverse momentum . A satisfactory
description of data on the rapidity spectra at 0.3 is illustrated
within a good agreement. The universal energy dependence of these spectra is
also shown.Comment: 6 pages, 3 figure
Single and Multi-Dimensional Optimal Auctions - A Network Approach
This paper highlights connections between the discrete and continuous approaches to optimal auction design with single and multi-dimensional types. We provide an interpretaion of an optimal auction design problem in terms of a linear program that is an instance of a parametric shortest path problem on a lattice. We also solve some cases explicitly in the discrete framework.Auctions, Networks, Linear Programming
Research and Development Workstation Environment: the new class of Current Research Information Systems
Against the backdrop of the development of modern technologies in the field
of scientific research the new class of Current Research Information Systems
(CRIS) and related intelligent information technologies has arisen. It was
called - Research and Development Workstation Environment (RDWE) - the
comprehensive problem-oriented information systems for scientific research and
development lifecycle support. The given paper describes design and development
fundamentals of the RDWE class systems. The RDWE class system's generalized
information model is represented in the article as a three-tuple composite web
service that include: a set of atomic web services, each of them can be
designed and developed as a microservice or a desktop application, that allows
them to be used as an independent software separately; a set of functions, the
functional filling-up of the Research and Development Workstation Environment;
a subset of atomic web services that are required to implement function of
composite web service. In accordance with the fundamental information model of
the RDWE class the system for supporting research in the field of ontology
engineering - the automated building of applied ontology in an arbitrary domain
area, scientific and technical creativity - the automated preparation of
application documents for patenting inventions in Ukraine was developed. It was
called - Personal Research Information System. A distinctive feature of such
systems is the possibility of their problematic orientation to various types of
scientific activities by combining on a variety of functional services and
adding new ones within the cloud integrated environment. The main results of
our work are focused on enhancing the effectiveness of the scientist's research
and development lifecycle in the arbitrary domain area.Comment: In English, 13 pages, 1 figure, 1 table, added references in Russian.
Published. Prepared for special issue (UkrPROG 2018 conference) of the
scientific journal "Problems of programming" (Founder: National Academy of
Sciences of Ukraine, Institute of Software Systems of NAS Ukraine
Do Hot Hands Exist Among Hedge Fund Managers? An Empirical Evaluation
We examine whether hot hands exist among hedge fund managers. In measuring performance persistence, we use hedge fund style benchmarks. This allows us to identify managers with valuable skills, and also to control for option-like features inherent in returns from hedge fund strategies. We take into account the possibility that reported asset values may be based on stale prices. We develop a statistical model that relates a hedge fund’s performance to its decision to liquidate or close in order to infer the performance of a hedge fund that left the database. While we find significant performance persistence among superior funds we find little evidence of persistence among inferior funds.
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