793 research outputs found

    Capturing the industrial requirements of set-based design for CONGA framework

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    The Configuration Optimisation of Next-Generation Aircraft (CONGA) is a proposed framework in a response industrial need to enhance the aerospace capability in the UK. In order to successfully address this challenge, a need to develop a true multi-disciplinary Set-Based Design (SBD) capability that could deploy new technologies on novel configurations more quickly and with greater confidence was identified. This paper presents the first step towards the development of the SBD capabilities which is to elicit the industrial requirement of the SBD process for the key aerospace industrial partners involved in this CONGA approach

    Capturing the Industrial Requirements of Set-Based Design for the CONGA Framework

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    The Configuration Optimisation of Next-Generation Aircraft (CONGA) is a proposed framework in a response to industrial need to enhance the aerospace capability in the UK. In order to successfully address this challenge, a need to develop a true multi-disciplinary Set-Based Design (SBD) capability that could deploy new technologies on novel configurations more quickly and with greater confidence was identified. This paper presents the first step towards the development of the SBD capabilities which is to elicit the industrial requirement of the SBD process for the key aerospace industrial partners involved in this CONGA approach

    How can hackathons accelerate corporate innovation?

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    IFIP WG 5.7 International Conference, APMS 2018, Seoul, Korea, August 26-30, 2018, Proceedings, Part I In recent years, the way corporates innovate has changed significantly. Going from ‘behind closed doors’ innovation to open innovation where collaboration with outsiders is encouraged, companies are in the pursuit of more effective ways to accelerate their innovation outcomes. As a result, many companies are investing to create more entrepreneurial environments, which not only empower employees to proactively propose and test new ideas, but also reach beyond company walls to involve many others in the co-creation of new solutions. In this paper, we outline the most notable benefits of hackathons from the perspective of large organizations, and present the benefits and a methodology for organizing hackathons, i.e. competition-based events where participants work in small teams over a short period of time to ideate, design, rapidly prototype and test their ideas with a user-centric approach to solve a determined challenge. This paper also provides a brief insight into the CEMEX Hackathon, which was organized following the aforementioned methodology

    A Driving Violation Index Modelling Study at Intersections in Urban Precincts Using Big Data

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    Driving violations at intersections are profoundly prevalent in urban precinct in China. These violations, including failing to stop for a red traffic light or arrow, driving across single continuous dividing line, disobeying traffic lane markings, and illegal parking, have become a major issue not only impacting the overall safety of the cities, but also causing traffic delays and accidents. This article focuses on the behaviors of the driving violations at intersections, and investigates what the influencing factors and characteristics are. A model of Driving Violation Index (DVI) for these driving violations at intersections has been developed by utilizing the Big Data approach. Based on the actual traffic data from the intersections in the city of Tianjin, a relationship has been fitted and established between the driving violations and the influencing factors, and further yielded the model of calculating the related DVI. This research attempts to provide a mechanism to forecast the driving violations at intersections, and explore new strategies for managing the security and safety of the intersections

    Search for the decay B+K0K+B^+\rightarrow\overline{K}{}^{*0}K^{*+} at Belle

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    We report a search for the rare charmless decay B+K0K+B^+\rightarrow\overline{K}{}^{*0}K^{*+} using a data sample of 772×106772\times10^6 BBˉB\bar{B} pairs collected at the Υ(4S)\Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ee^+e^- collider. No statistically significant signal is found and a 90% confidence-level upper limit is set on the decay branching fraction as B(B+K0K+)<1.31×106 \mathcal{B}(B^+\rightarrow\overline{K}{}^{*0}K^{*+}) <1.31\times 10^{-6}.Comment: 8 pages, 3 figures, submitted to PRD(RC

    Search for Bs0γγB_{s}^{0}\rightarrow\gamma\gamma and a measurement of the branching fraction for Bs0ϕγB_{s}^{0}\rightarrow\phi\gamma

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    We search for the decay Bs0γγB_{s}^{0}\rightarrow\gamma\gamma and measure the branching fraction for Bs0ϕγB_{s}^{0}\rightarrow\phi\gamma using 121.4~fb1\textrm{fb}^{-1} of data collected at the Υ(5S)\Upsilon(\mathrm{5}S) resonance with the Belle detector at the KEKB asymmetric-energy e+ee^{+}e^{-} collider. The Bs0ϕγB_{s}^{0}\rightarrow\phi\gamma branching fraction is measured to be (3.6±0.5(stat.)±0.3(syst.)±0.6(fs))×105(3.6 \pm 0.5 (\mathrm{stat.}) \pm 0.3 (\mathrm{syst.}) \pm 0.6 (f_{s})) \times 10^{-5}, where fsf_{s} is the fraction of Bs()Bˉs()B_{s}^{(*)}\bar{B}_{s}^{(*)} in bbˉb\bar{b} events. Our result is in good agreement with the theoretical predictions as well as with a recent measurement from LHCb. We observe no statistically significant signal for the decay Bs0γγB_{s}^{0}\rightarrow\gamma\gamma and set a 90%90\% confidence-level upper limit on its branching fraction at 3.1×106 3.1 \times 10^{-6}. This constitutes a significant improvement over the previous result.Comment: 6 pages, 3 figure

    Measurement of e+eγχcJe^+e^- \to \gamma\chi_{cJ} via initial state radiation at Belle

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    The process e+eγχcJe^+e^- \to \gamma\chi_{cJ} (JJ=1, 2) is studied via initial state radiation using 980 fb1^{-1} of data at and around the Υ(nS)\Upsilon(nS) (nn=1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetric-energy e+ee^+e^- collider. No significant signal is observed except from ψ(2S)\psi(2S) decays. Upper limits on the cross sections between s=3.80\sqrt{s}=3.80 and 5.56 GeV5.56~{\rm GeV} are determined at the 90% credibility level, which range from few pb to a few tens of pb. We also set upper limits on the decay rate of the vector charmonium [ψ(4040\psi(4040), ψ(4160)\psi(4160), and ψ(4415)\psi(4415)] and charmoniumlike [Y(4260)Y(4260), Y(4360)Y(4360), and Y(4660)Y(4660)] states to γχcJ\gamma\chi_{cJ}.Comment: Accepted by PR

    Evidence of Υ(1S)J/ψ+χc1\Upsilon(1S) \to J/\psi+\chi_{c1} and search for double-charmonium production in Υ(1S)\Upsilon(1S) and Υ(2S)\Upsilon(2S) decays

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    Using data samples of 102×106102\times10^6 Υ(1S)\Upsilon(1S) and 158×106158\times10^6 Υ(2S)\Upsilon(2S) events collected with the Belle detector, a first experimental search has been made for double-charmonium production in the exclusive decays Υ(1S,2S)J/ψ(ψ)+X\Upsilon(1S,2S)\rightarrow J/\psi(\psi')+X, where X=ηcX=\eta_c, χcJ(J= 0, 1, 2)\chi_{cJ} (J=~0,~1,~2), ηc(2S)\eta_c(2S), X(3940)X(3940), and X(4160)X(4160). No significant signal is observed in the spectra of the mass recoiling against the reconstructed J/ψJ/\psi or ψ\psi' except for the evidence of χc1\chi_{c1} production with a significance of 4.6σ4.6\sigma for Υ(1S)J/ψ+χc1\Upsilon(1S)\rightarrow J/\psi+\chi_{c1}. The measured branching fraction \BR(\Upsilon(1S)\rightarrow J/\psi+\chi_{c1}) is (3.90±1.21(stat.)±0.23(syst.))×106(3.90\pm1.21(\rm stat.)\pm0.23 (\rm syst.))\times10^{-6}. The 90%90\% confidence level upper limits on the branching fractions of the other modes having a significance of less than 3σ3\sigma are determined. These results are consistent with theoretical calculations using the nonrelativistic QCD factorization approach.Comment: 12 pages, 4 figures, 1 table. The fit range was extended to include X(4160) signal according to referee's suggestions. Other results unchanged. Paper was accepted for publication as a regular article in Physical Review

    Observation of D0ρ0γD^0\to \rho^0\gamma and search for CPCP violation in radiative charm decays

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    We report the first observation of the radiative charm decay D0ρ0γD^0 \to \rho^0 \gamma and the first search for CPCP violation in decays D0ρ0γD^0 \to \rho^0 \gamma, ϕγ\phi\gamma, and K0γ\overline{K}{}^{*0} \gamma, using a data sample of 943 fb1^{-1} collected with the Belle detector at the KEKB asymmetric-energy e+ee^+e^- collider. The branching fraction is measured to be B(D0ρ0γ)=(1.77±0.30±0.07)×105\mathcal{B}(D^0 \to \rho^0 \gamma)=(1.77 \pm 0.30 \pm 0.07) \times 10^{-5}, where the first uncertainty is statistical and the second is systematic. The obtained CPCP asymmetries, ACP(D0ρ0γ)=+0.056±0.152±0.006\mathcal{A}_{CP}(D^0 \to \rho^0 \gamma)=+0.056 \pm 0.152 \pm 0.006, ACP(D0ϕγ)=0.094±0.066±0.001\mathcal{A}_{CP}(D^0 \to \phi \gamma)=-0.094 \pm 0.066 \pm 0.001, and ACP(D0K0γ)=0.003±0.020±0.000\mathcal{A}_{CP}(D^0 \to \overline{K}{}^{*0} \gamma)=-0.003 \pm 0.020 \pm 0.000, are consistent with no CPCP violation. We also present an improved measurement of the branching fractions B(D0ϕγ)=(2.76±0.19±0.10)×105\mathcal{B}(D^0 \to \phi \gamma)=(2.76 \pm 0.19 \pm 0.10) \times 10^{-5} and B(D0K0γ)=(4.66±0.21±0.21)×104\mathcal{B}(D^0 \to \overline{K}{}^{*0} \gamma)=(4.66 \pm 0.21 \pm 0.21) \times 10^{-4}

    Observation of a new charged charmoniumlike state in B -> J/psi K pi decays

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    We present the results of an amplitude analysis of anti-B0 -> J/psi K- pi+ decays. A new charged charmoniumlike state Zc(4200)+ decaying to J/psi pi+ is observed with a significance of 6.2 sigma. The mass and width of the Zc(4200)+ are 4196 +31-29 +17-13 MeV/c^2 and 370 +70-70 +70-132 MeV, respectively; the preferred assignment of the quantum numbers is J^P = 1^+. In addition, we find evidence for Zc(4430)+ -> J/psi pi+. The analysis is based on a 711 fb^-1 data sample collected by the Belle detector at the asymmetric-energy e+ e- collider KEKB.Comment: 14 pages, 13 figure
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