Phys. Rev. D 59, 074007 (1999) We discuss the phenomenology of initial-state parton-kt broadening in
direct-photon production and related processes in hadron collisions. After a
brief summary of the ...theoretical basis for a Gaussian-smearing approach, we
present a systematic study of recent results on fixed-target and collider
direct-photon production, using complementary data on diphoton and pion
production to provide empirical guidance on the required amount of kt
broadening. This approach provides a consistent description of the observed
pattern of deviation of next-to-leading order QCD calculations relative to the
direct-photon data, and accounts for the shape and normalization difference
between fixed-order perturbative calculations and the data. We also discuss the
uncertainties in this phenomenological approach, the implications of these
results on the extraction of the gluon distribution of the nucleon, and the
comparison of our findings to recent related work.
The experiments at Run 2 of the Tevatron have each accumulated over 1 inverse femtobarn of high-transverse momentum data. Such a dataset allows for the first precision (i.e. comparisons between ...theory and experiment at the few percent level) tests of QCD at a hadron collider. While the Large Hadron Collider has been designed as a discovery machine, basic QCD analyses will still need to be performed to understand the working environment. The Tevatron-for-LHC workshop was conceived as a communication link to pass on the expertise of the Tevatron and to test new analysis ideas coming from the LHC community. The TeV4LHC QCD Working Group focussed on important aspects of QCD at hadron colliders: jet definitions, extraction and use of Parton Distribution Functions, the underlying event, Monte Carlo tunes, and diffractive physics. This report summarizes some of the results achieved during this workshop.
We present a study of inclusive direct-photon and pion production in hadronic interactions, focusing on a comparison of the ratio of gamma/pi0 yields with expectations from next-to-leading order ...perturbative QCD (NLO pQCD). We also examine the impact of a phenomenological model involving k_T smearing (which approximates effects of additional soft-gluon emission) on absolute predictions for photon and pion production and their ratio.
This report discusses physics issues which can be addressed in photon and
weak boson production in Run II at the Tevatron. The current understanding and
the potential of Run II to expand our ...knowledge of direct photon production in
hadronic collisions is discussed. We explore the prospects for using the
W-boson cross section to measure the integrated luminosity, improving the
measurement of the W and Z boson transverse momentum distributions, the Z ->
b\bar b signal, and the lepton angular distribution in W decays. Finally, we
consider the prospects for measuring the trilinear gauge boson couplings in Run
II.
What Makes a Great Manager of Software Engineers? Kalliamvakou, Eirini; Bird, Christian; Zimmermann, Thomas ...
IEEE transactions on software engineering,
2019-Jan.-1, 2019-1-1, 20190101, Letnik:
45, Številka:
1
Journal Article
Recenzirano
Having great managers is as critical to success as having a good team or organization. In general, a great manager is seen as fuelling the team they manage, enabling it to use its full potential. ...Though software engineering research studies factors that may affect the performance and productivity of software engineers and teams (like tools and skills), it has overlooked the software engineering manager. The software industry's growth and change in the last decades is creating a need for a domain-specific view of management. On the one hand, experts are questioning how the abundant work in management applies to software engineering. On the other hand, practitioners are looking to researchers for evidence-based guidance on how to manage software teams. We conducted a mixed methods empirical study of software engineering management at Microsoft to investigate what manager attributes developers and engineering managers perceive important and why. We present a conceptual framework of manager attributes, and find that technical skills are not the sign of greatness for an engineering manager. Through statistical analysis we identify how engineers and managers relate in their views, and how software engineering differs from other knowledge work groups in its perceptions about what makes great managers. We present strategies for putting the attributes to use, discuss implications for research and practice, and offer avenues for further work.
We discuss the phenomenology of initial-state parton-kt broadening in direct-photon production and related processes in hadron collisions. After a brief summary of the theoretical basis for a ...Gaussian-smearing approach, we present a systematic study of recent results on fixed-target and collider direct-photon production, using complementary data on diphoton and pion production to provide empirical guidance on the required amount of kt broadening. This approach provides a consistent description of the observed pattern of deviation of next-to-leading order QCD calculations relative to the direct-photon data, and accounts for the shape and normalization difference between fixed-order perturbative calculations and the data. We also discuss the uncertainties in this phenomenological approach, the implications of these results on the extraction of the gluon distribution of the nucleon, and the comparison of our findings to recent related work.
This report discusses physics issues which can be addressed in photon and weak boson production in Run II at the Tevatron. The current understanding and the potential of Run II to expand our ...knowledge of direct photon production in hadronic collisions is discussed. We explore the prospects for using the W-boson cross section to measure the integrated luminosity, improving the measurement of the W and Z boson transverse momentum distributions, the Z -> b\bar b signal, and the lepton angular distribution in W decays. Finally, we consider the prospects for measuring the trilinear gauge boson couplings in Run II.
Over the past decade, the advent of social networking has fundamentally altered the landscape of how software is used, designed, and developed. It has expanded how communities of software ...stakeholders communicate, collaborate, learn from, and coordinate with one another. The guest editors of this special issue describe both the field and the articles they selected for it.
How to put probabilities on homographies Begelfor, E.; Werman, M.
IEEE transactions on pattern analysis and machine intelligence,
10/2005, Letnik:
27, Številka:
10
Journal Article
Recenzirano
Odprti dostop
We present a family of "normal" distributions over a matrix group together with a simple method for estimating its parameters. In particular, the mean of a set of elements can be calculated. The ...approach is applied to planar projective homographies, showing that using priors defined in this way improves object recognition.
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