830,770 research outputs found
Project-based Innovation Learning Mechanisms in the Built Environment
Built environment organisations innovate or adopt innovation to address complexity and uncertainty that emerge in project operations. Amongst various built environment innovations, Building Information Modelling (BIM) is prominently chosen by the built environment organisations. This innovation presents a great challenge for Small- and Medium-sized Enterprises (SMEs). It renders existing working paradigms obsolete and digitally transforms built environment businesses. The lack of individuals with adequate BIM competence is a major problem. Project-Based Learning (PBL) is a potential solution. This research aims to investigate BIM learning in projects in the built environment SMEs. The study examines knowledge practices used in projects and how they are exercised together in forming a project-based learning mechanism of BIM. 31 designers and engineers from the British and the Thai design and engineering SME consultancies are interviewed. Knowledge practices are identified based on their significance, while associations between them are analysed. Informal meeting, Knowledge team creation, and Standardisation play a crucial role in BIM learning in projects. Informal meeting and Knowledge team creation relate to tacit knowledge learning and exploration. Standardisation encourages explicit knowledge learning and exploitation. A project-based learning mechanism of BIM is formed through an interconnected system of knowledge practices. The connections among knowledge practices are found as assistive and correlative. The project-based learning mechanisms of BIM identified within this research are ambidextrous through the variety of knowledge practices being exercised together. Additionally, they can be further categorised as Exploitative, Ambidextrous, and Explorative. Practical suggestions are provided for BIM managers to increase attention towards the employment of certain knowledge practices and the creation of project-based learning mechanisms of BIM. Informal meeting, Knowledge team creation, and Standardisation are recommended for managers of BIM and other innovations. Innovation managers can balance ambidexterity by utilising an array of knowledge practices to encourage both exploitation and exploration. Proactive and tangible support such as the implementation of guidelines and protocols from the public sector in developing countries will promote BIM learning in organisations and encourage industry-wide adoption
Prompt Delay
Delay games are two-player games of infinite duration in which one player may
delay her moves to obtain a lookahead on her opponent's moves. Recently, such
games with quantitative winning conditions in weak MSO with the unbounding
quantifier were studied, but their properties turned out to be unsatisfactory.
In particular, unbounded lookahead is in general necessary. Here, we study
delay games with winning conditions given by Prompt-LTL, Linear Temporal Logic
equipped with a parameterized eventually operator whose scope is bounded. Our
main result shows that solving Prompt-LTL delay games is complete for
triply-exponential time. Furthermore, we give tight triply-exponential bounds
on the necessary lookahead and on the scope of the parameterized eventually
operator. Thus, we identify Prompt-LTL as the first known class of well-behaved
quantitative winning conditions for delay games. Finally, we show that applying
our techniques to delay games with \omega-regular winning conditions answers
open questions in the cases where the winning conditions are given by
non-deterministic, universal, or alternating automata
Measuring the prompt atmospheric neutrino flux with down-going muons in neutrino telescopes
In the TeV energy region and above, the uncertainty in the level of prompt
atmospheric neutrinos would limit the search for diffuse astrophysical
neutrinos. We suggest that neutrino telescopes may provide an empirical
determination of the flux of prompt atmospheric electron and muon neutrinos by
measuring the flux of prompt down-going muons. Our suggestion is based on the
consideration that prompt neutrino and prompt muon fluxes at sea level are
almost identical.Comment: 4 pages, 3 figure
The Dark Side of ROTSE-III Prompt GRB Observations
We present several cases of optical observations during gamma-ray bursts (GRBs) which resulted in prompt limits but no detection of optical emission. These limits constrain the prompt optical flux densities and the optical brightness relative to the gamma-ray emission. The derived constraints fall within the range of properties observed in GRBs with prompt optical detections, though at the faint end of optical/gamma flux ratios. The presently accessible prompt optical limits do not require a different set of intrinsic or environmental GRB properties, relative to the events with prompt optical detections
Measurement of χ c1 and χ c2 production with s√ = 7 TeV pp collisions at ATLAS
The prompt and non-prompt production cross-sections for the χ c1 and χ c2 charmonium states are measured in pp collisions at s√ = 7 TeV with the ATLAS detector at the LHC using 4.5 fb−1 of integrated luminosity. The χ c states are reconstructed through the radiative decay χ c → J/ψγ (with J/ψ → μ + μ −) where photons are reconstructed from γ → e + e − conversions. The production rate of the χ c2 state relative to the χ c1 state is measured for prompt and non-prompt χ c as a function of J/ψ transverse momentum. The prompt χ c cross-sections are combined with existing measurements of prompt J/ψ production to derive the fraction of prompt J/ψ produced in feed-down from χ c decays. The fractions of χ c1 and χ c2 produced in b-hadron decays are also measured
Production of Prompt Photons
After a brief review of the production dynamics of prompt single photons in
hadron collisions, I summarize a new QCD calculation of the transverse momentum
distribution of continuum prompt photon pairs produced by QCD subprocesses,
including all-orders soft-gluon resummation valid at next-to-next-to-leading
logarithmic accuracy. Resummation is necessary to obtain reliable predictions,
as well as good agreement with data from the Fermilab Tevatron, in the range of
transverse momentum where the cross section is largest. Predictions are made
for the Large Hadron Collider where the QCD diphoton continuum is shown to have
a softer spectrum in transverse momentum than the Higgs boson signal.Comment: 5 pages, 2 figures, AIP style file. To be published in the
Proceedings of the 9th Conference on the Intersections of Particle and
Nuclear Physics (CIPANP 2006), Rio Grande, Puerto Rico, May 30 - June 3, 200
The prompt lepton cookbook
We review the calculation of the prompt lepton flux, produced in the
atmosphere by the semileptonic decay of charmed particles. We describe side by
side the intermediary ingredients used by different authors, which include not
only the charm production model, but also other atmospheric particle showering
parameters. After evaluating separately the relevance of each single
ingredient, we analyze the effect of different combinations over the final
result. We highlight the impact of the prompt lepton flux calculation upon
high-energy neutrino telescopes.Comment: 21 pages, 10 figures; revised version, accepted for publication in
Astroparticle Physic
The Dark Side of ROTSE-III Prompt GRB Observations
We present several cases of optical observations during gamma-ray bursts
(GRBs) which resulted in prompt limits but no detection of optical emission.
These limits constrain the prompt optical flux densities and the optical
brightness relative to the gamma-ray emission. The derived constraints fall
within the range of properties observed in GRBs with prompt optical detections,
though at the faint end of optical/gamma flux ratios. The presently accessible
prompt optical limits do not require a different set of intrinsic or
environmental GRB properties, relative to the events with prompt optical
detections.Comment: ApJ accepted. 20 pages in draft manuscript form, which includes 6
pages of tables and 2 figure
Prompt photons at RHIC
We calculate the inclusive cross section for prompt photon production in
heavy-ion collisions at RHIC energies ( GeV and
GeV) in the central rapidity region including next-to-leading order,
, radiative corrections, initial state nuclear
shadowing and parton energy loss effects. We show that there is a significant
suppression of the nuclear cross section, up to at
GeV, due to shadowing and medium induced parton energy loss effects. We find
that the next-to-leading order contributions are large and have a strong
dependence.Comment: 9 pages, 5 figures, expanded discussion of the K facto
- …