Advanced search in
Research products
arrow_drop_down
Searching FieldsTerms
Any field
arrow_drop_down
includes
arrow_drop_down
Include:
791 Research products, page 1 of 80

  • Publications
  • Research data
  • Research software
  • 2018-2022
  • Open Access
  • Research
  • European Commission
  • English

10
arrow_drop_down
Relevance
arrow_drop_down
  • Publication . Article . Other literature type . Research . Preprint . 2021
    Open Access English
    Authors: 
    Cole Lindsey; Ayse Polatoz; Alessandro Thea; Sinan Sagir; Soureek Mitra; Ram Krishna Dewanjee; Daniele Fasanella; Robert Hirosky; Santeri Laurila; Austin Baty; +557 more
    Countries: Belgium, Italy, Spain, Turkey, United Kingdom, Italy, Italy, Germany, France, United States ...
    Project: EC | LHCTOPVLQ (752730), EC | INSIGHTS (765710), EC | AMVA4NewPhysics (675440)

    Evidence for Higgs boson decay to a pair of muons is presented. This result combines searches in four exclusive categories targeting the production of the Higgs boson via gluon fusion, via vector boson fusion, in association with a vector boson, and in association with a top quark-antiquark pair. The analysis is performed using proton-proton collision data at s√ = 13 TeV, corresponding to an integrated luminosity of 137 fb−1, recorded by the CMS experiment at the CERN LHC. An excess of events over the back- ground expectation is observed in data with a significance of 3.0 standard deviations, where the expectation for the standard model (SM) Higgs boson with mass of 125.38 GeV is 2.5. The combination of this result with that from data recorded at s√ = 7 and 8 TeV, corresponding to integrated luminosities of 5.1 and 19.7 fb−1, respectively, increases both the expected and observed significances by 1%. The measured signal strength, relative to the SM prediction, is 1.19+0.40−0.39(stat)+0.15−0.14(syst). This result constitutes the first evidence for the decay of the Higgs boson to second generation fermions and is the most precise measurement of the Higgs boson coupling to muons reported to date. Individuals have received support from the Marie-Curie programme and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 752730, and 765710 (European Union); the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias. CMS collaboration: et al. Peer reviewed

  • Publication . Article . Preprint . Other literature type . Research . Report . 2018
    Open Access English
    Authors: 
    Ece Aşılar; Marko Dragicevic; Dietrich Liko; Jochen Schieck; Wolfgang Waltenberger; Claudia-Elisabeth Wulz; Vladimir Chekhovsky; Freya Blekman; Stefaan Tavernier; I. Van Parijs; +450 more
    Publisher: Springer
    Countries: Turkey, Switzerland, Lithuania, Finland, Spain, Italy, Germany, Belgium, Italy, Turkey ...
    Project: EC | AMVA4NewPhysics (675440)

    A search for charged Higgs boson decaying to a charm and a bottom quark ( $ {\mathrm{H}}^{+}\to \mathrm{c}\overline{\mathrm{b}} $ ) is performed using 19.7 fb$^{−1}$ of pp collision data at $ \sqrt{s}=8 $ TeV. The production mechanism investigated in this search is $ \mathrm{t}\overline{\mathrm{t}} $ pair production in which one top quark decays to a charged Higgs boson and a bottom quark and the other decays to a charged lepton, a neutrino, and a bottom quark. Charged Higgs boson decays to $ \mathrm{c}\overline{\mathrm{b}} $ are searched for, resulting in a final state containing at least four jets, a charged lepton (muon or electron), and missing transverse momentum. A kinematic fit is performed to identify the pair of jets least likely to be the bottom quarks originating from direct top quark decays and the invariant mass of this pair is used as the final observable in the search. No evidence for the presence of a charged Higgs boson is observed and upper limits at 95% confidence level of 0.8–0.5% are set on the branching fraction ℬ(t → H$^{+}$b), assuming ℬ(H$^{+}$ → $ \mathrm{c}\overline{\mathrm{b}} $ ) = 1.0 and ℬ(t → H$^{+}$b) + ℬ(t → Wb) = 1.0, for the charged Higgs boson mass range 90–150 GeV. Journal of high energy physics 1811(11), 115 (2018). doi:10.1007/JHEP11(2018)115 Published by Springer Nature, Cham

  • Open Access English
    Authors: 
    Penca; Jerneja;
    Publisher: Zenodo
    Project: EC | EL-CSID (693799)

    Across the policy discourses and academic literature, the popularity of the concept of “science diplomacy” has used the concept in an uncritical manner. This paper aims to understand the concept’s value-added and the implications of its use. It considers the evolution of scientific cooperation and its interaction with foreign policy in the Euro-Mediterranean region. It finds out that many of the goals currently enshrined in “science diplomacy” have already constituted the history of the Euro-Mediterranean relationships since the launch of the Euro-Mediterranean Partnership. The difference with the past is that the EU now has higher political and economic expectations of genuine scientific cooperation. However, in contrast to widening the objectives, the EU has not substantively broadened the tools it avails of. This leads us to expect that the EU’s actual policy in regional scientific cooperation might nevertheless stay the same. While the rhetoric of science diplomacy is of little use, the paper suggests some meaningful questions in the science-foreign policy nexus to replace it.

  • Publication . Other literature type . Article . Research . Preprint . 2021
    Open Access English
    Authors: 
    Fruehwirth, Rudolf; Wulz, Claudia-Elisabeth; Melo Da Costa, Eliza; BRANDAO MALBOUISSON, Helena; Tomei, Thiago; De Moraes Gregores, Eduardo; De Souza Lemos, Dener; Garcia Fuentes, Francisco Ignacio; AGRAM, Jean-Laurent; Brom, Jean-Marie; +193 more
    Publisher: North-Holland Publ.
    Countries: Belgium, Germany, Italy, Switzerland, Italy, Belgium, Belgium, Spain, France, Germany ...
    Project: EC | LHCTOPVLQ (752730), EC | INSIGHTS (765710), EC | AMVA4NewPhysics (675440)

    Measurements of the second Fourier harmonic coefficient (v2) of the azimuthal distributions of prompt and nonprompt D0 mesons produced in pp and pPb collisions are presented. Nonprompt D0 mesons come from beauty hadron decays. The data samples are collected by the CMS experiment at nucleon-nucleon center-of-mass energies of 13 and 8.16 TeV, respectively. In high multiplicity pp collisions, v2 signals for prompt charm hadrons are reported for the first time, and are found to be comparable to those for light-flavor hadron species over a transverse momentum (pT) range of 2–6 GeV. Compared at similar event multiplicities, the prompt D0 meson v2 values in pp and pPb collisions are similar in magnitude. The v2 values for open beauty hadrons are extracted for the first time via nonprompt D0 mesons in pPb collisions. For pT in the range of 2–5 GeV, the results suggest that v2 for nonprompt D0 mesons is smaller than that for prompt D0 mesons. These new measurements indicate a positive charm hadron v2 in pp collisions and suggest a mass dependence in v2 between charm and beauty hadrons in the pPb system. These results provide insights into the origin of heavy-flavor quark collectivity in small systems. Individuals have received support from the Marie-Curie program and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 752730, and 765710 (European Union); CERN; the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias. CMS Collaboration: et al. Funded by SCOAP3. Peer reviewed

  • Open Access English
    Authors: 
    Tsitsokas, Dimitrios; Kouvelas, Anastasios; id_orcid0000-0003-4571-2530; Geroliminis, Nikolas;
    Publisher: ETH Zurich
    Country: Switzerland
    Project: EC | DIT4TraM (953783)

    Traffic-responsive signal control is a cost-effective and easy-to-implement network management strategy with high potential in improving performance in congested networks with dynamic characteristics. Max Pressure (MP) distributed controller gained significant popularity due to its theoretically proven ability of queue stabilization and throughput maximization under specific assumptions. However, its effectiveness under saturated conditions is questionable, while network-wide application is limited due to high instrumentation cost. Perimeter control (PC) based on the concept of the Macroscopic Fundamental Diagram (MFD) is a state-of-the-art aggregated strategy that regulates exchange flows between regions, in order to maintain maximum regional travel production and prevent over-saturation. Yet, homogeneity assumption is hardly realistic in congested states, thus compromising PC efficiency. In this paper, the effectiveness of network-wide, parallel application of PC and MP embedded in a two-layer control framework is assessed with mesoscopic simulation. Aiming at reducing implementation cost of MP without significant performance loss, we propose a method to identify critical nodes for partial MP deployment. A modified version of Store-and-forward paradigm incorporating finite queue and spill-back consideration is used to test different configurations of the proposed framework, for a real large-scale network, in moderately and highly congested scenarios. Results show that: (i) combined control of MP and PC outperforms separate MP and PC applications in both demand scenarios; (ii) MP control in reduced critical node sets leads to similar or even better performance compared to full-network implementation, thus allowing for significant cost reduction; iii) the proposed control schemes improve system performance even under demand fluctuations of up to 20% of mean. arXiv

  • Open Access English
    Authors: 
    Köhler, Mila;
    Publisher: Mannheim: Zentrum für Europäische Wirtschaftsforschung (ZEW)
    Country: Germany
    Project: EC | SIMPATIC (290597)

    In Germany, R&D subsidies are an important tool to support innovation in the private sector. This paper studies the welfare effects of R&D subsidies distributed through the German federal government’s thematic R&D programs between 1994 and 2011. The analysis is based on a structural model of the R&D subsidy process which allows to estimate the benefits of R&D subsides to the German economy. The model takes into account heterogeneous application costs of firms and identifies the effect of the subsidy on the federal government’s utility as well as on firm profits. Assuming a welfare-maximizing federal government, the estimated average social rate of return is 34% for Germany in the period 1994 to 2011. Thereby effects on firm profits are similar to effects on spillovers to the rest of the German economy. Besides results show that the subsidy rate decision in Germany remained remarkably stable over time, and that application costs as well as the marginal profitability of subsidized R&D projects are lower after the year 2000 compared to the years before.

  • Open Access English
    Authors: 
    Sirunyan, Albert M; Tumasyan, Armen; Fruehwirth, Rudolf; Alves, Gilvan; Kim, Tae Jeong; Park, Jiwon; Cho, Sungwoong; Choi, Suyong; Go, Yeonju; Gyun, Dooyeon; +190 more
    Publisher: HAL CCSD
    Countries: Italy, United States, Switzerland, Italy, Italy, Italy, Italy, Germany, France, United Kingdom
    Project: EC | INSIGHTS (765710), EC | LHCTOPVLQ (752730), EC | AMVA4NewPhysics (675440)

    A search in an all-jet final state for new massive resonances decaying to $\text{ W }{}{}\text{ W }{}{}$, $\text{ W }{}{}\text{ Z }{}{}$, or $\text{ Z }{}{}\text{ Z }{}{}$ boson pairs using a novel analysis method is presented. The analysis is performed on data corresponding to an integrated luminosity of 77.3 $\,\text {fb}^{-1}$ recorded with the CMS experiment at the LHC at a centre-of-mass energy of 13 $\text {Te}\text {V}$. The search is focussed on potential narrow-width resonances with masses above 1.2 $\text {Te}\text {V}$, where the decay products of each $\text{ W }{}{}$ or $\text{ Z }{}{}$ boson are expected to be collimated into a single, large-radius jet. The signal is extracted using a three-dimensional maximum likelihood fit of the two jet masses and the dijet invariant mass, yielding an improvement in sensitivity of up to 30% relative to previous search methods. No excess is observed above the estimated standard model background. In a heavy vector triplet model, spin-1 ${\text {Z}}^{\prime }$ and ${\text {W}}^{\prime }$ resonances with masses below 3.5 and 3.8 $\text {Te}\text {V}$, respectively, are excluded at 95% confidence level. In a bulk graviton model, upper limits on cross sections are set between 27 and 0.2 $\,\text {fb}$ for resonance masses between 1.2 and 5.2 $\text {Te}\text {V}$, respectively. The limits presented in this paper are the best to date in the dijet final state. The European physical journal / C Particles and fields C 80(3), 237 (2020). doi:10.1140/epjc/s10052-020-7773-5 Published by Springer, Heidelberg

  • Publication . Article . Preprint . Other literature type . Research . 2020
    Open Access English
    Authors: 
    Salvatore Aiola; Simon Akar; Johannes Albrecht; Sandra Amato; G. Andreassi; John Back; Wander Baldini; William Barter; Fedor Baryshnikov; Jan-Marc Basels; +260 more
    Publisher: SpringerOpen
    Countries: Italy, United Kingdom, Netherlands, Italy, United Kingdom, France, Switzerland, Italy, Spain, Italy ...
    Project: EC | pANUCSTR (792684)

    A precision measurement of the $ {B}_c^{+} $ meson mass is performed using proton- proton collision data collected with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 9.0 fb$^{−1}$. The $ {B}_c^{+} $ mesons are reconstructed via the decays $ {B}_c^{+} $→ J/ψπ$^{+}$, $ {B}_c^{+} $→ J/ψπ$^{+}$π$^{−}$π$^{+}$, $ {B}_c^{+}\to J/\psi p\overline{p}{\pi}^{+} $, $ {B}_c^{+}\to J/\psi {D}_s^{+} $, $ {B}_c^{+} $→ J/ψ D$^{0}$K$^{+}$ and $ {B}_c^{+}\to {B}_s^0{\pi}^{+} $. Combining the results of the individual decay channels, the $ {B}_c^{+} $ mass is measured to be 6274.47 ± 0.27 (stat) ± 0.17 (syst) MeV/c$^{2}$. This is the most precise measurement of the $ {B}_c^{+} $ mass to date. The difference between the $ {B}_c^{+} $ and $ {B}_s^0 $ meson masses is measured to be 907.75 ± 0.37 (stat) ± 0.27 (syst) MeV/c$^2.$ Journal of high energy physics 07(7), 123 (1-20) (2020). doi:10.1007/JHEP07(2020)123 Published by SISSA, [Trieste]

  • Publication . Report . Conference object . Research . 2018
    Open Access English
    Authors: 
    Jaap van Milgen;
    Publisher: HAL CCSD
    Country: France
    Project: EC | Feed-a-Gene (633531)

    International audience

  • Open Access English
    Authors: 
    Kopelyan, Sofya; Nieth, Lisa Johanna;
    Country: Netherlands
    Project: EC | RUNIN (722295)

    A well-functioning regional innovation system involves a lot of communication and interaction among the actors. However, sometimes the communication and interaction create tensions impeding regional development. In order to explore the reasons behind this, this study looks at the relationships between key stakeholders in the Twente Region in the Netherlands. The region has an established reputation for innovation and entrepreneurship, a high inter-connectedness between the actors, and a strong knowledge infrastructure. The research focuses on the University of Twente as a key actor contributing to regional growth in close cooperation with various stakeholders. This is an introductory interview-based case study that identifies four areas of tension between the university and its regional stakeholders. Our inquiry sheds light on the misalignment of stakeholders’ interests and expectations that lessens the actors’ capacity for policy formulation and strategic agenda setting, as well as hinders its successful translation into action. Then, the absence of clear intermediaries significantly increases the perceived distance between the University of Twente and the Twente region and impedes the university’s collaboration with companies outside the science and business park. Next, the tension of discontinuity highlights the complexities of human resources and personalised networks – their diversity, multidimensionality, and overlaps make it harder to synchronise action and enhance reciprocal benefits. The knowledge asymmetry between the parties further complicates their communication and weakens commitment. In the end, the paper offers a few ideas for action for academic leaders and regional policymakers.

Advanced search in
Research products
arrow_drop_down
Searching FieldsTerms
Any field
arrow_drop_down
includes
arrow_drop_down
Include:
791 Research products, page 1 of 80
  • Publication . Article . Other literature type . Research . Preprint . 2021
    Open Access English
    Authors: 
    Cole Lindsey; Ayse Polatoz; Alessandro Thea; Sinan Sagir; Soureek Mitra; Ram Krishna Dewanjee; Daniele Fasanella; Robert Hirosky; Santeri Laurila; Austin Baty; +557 more
    Countries: Belgium, Italy, Spain, Turkey, United Kingdom, Italy, Italy, Germany, France, United States ...
    Project: EC | LHCTOPVLQ (752730), EC | INSIGHTS (765710), EC | AMVA4NewPhysics (675440)

    Evidence for Higgs boson decay to a pair of muons is presented. This result combines searches in four exclusive categories targeting the production of the Higgs boson via gluon fusion, via vector boson fusion, in association with a vector boson, and in association with a top quark-antiquark pair. The analysis is performed using proton-proton collision data at s√ = 13 TeV, corresponding to an integrated luminosity of 137 fb−1, recorded by the CMS experiment at the CERN LHC. An excess of events over the back- ground expectation is observed in data with a significance of 3.0 standard deviations, where the expectation for the standard model (SM) Higgs boson with mass of 125.38 GeV is 2.5. The combination of this result with that from data recorded at s√ = 7 and 8 TeV, corresponding to integrated luminosities of 5.1 and 19.7 fb−1, respectively, increases both the expected and observed significances by 1%. The measured signal strength, relative to the SM prediction, is 1.19+0.40−0.39(stat)+0.15−0.14(syst). This result constitutes the first evidence for the decay of the Higgs boson to second generation fermions and is the most precise measurement of the Higgs boson coupling to muons reported to date. Individuals have received support from the Marie-Curie programme and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 752730, and 765710 (European Union); the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias. CMS collaboration: et al. Peer reviewed

  • Publication . Article . Preprint . Other literature type . Research . Report . 2018
    Open Access English
    Authors: 
    Ece Aşılar; Marko Dragicevic; Dietrich Liko; Jochen Schieck; Wolfgang Waltenberger; Claudia-Elisabeth Wulz; Vladimir Chekhovsky; Freya Blekman; Stefaan Tavernier; I. Van Parijs; +450 more
    Publisher: Springer
    Countries: Turkey, Switzerland, Lithuania, Finland, Spain, Italy, Germany, Belgium, Italy, Turkey ...
    Project: EC | AMVA4NewPhysics (675440)

    A search for charged Higgs boson decaying to a charm and a bottom quark ( $ {\mathrm{H}}^{+}\to \mathrm{c}\overline{\mathrm{b}} $ ) is performed using 19.7 fb$^{−1}$ of pp collision data at $ \sqrt{s}=8 $ TeV. The production mechanism investigated in this search is $ \mathrm{t}\overline{\mathrm{t}} $ pair production in which one top quark decays to a charged Higgs boson and a bottom quark and the other decays to a charged lepton, a neutrino, and a bottom quark. Charged Higgs boson decays to $ \mathrm{c}\overline{\mathrm{b}} $ are searched for, resulting in a final state containing at least four jets, a charged lepton (muon or electron), and missing transverse momentum. A kinematic fit is performed to identify the pair of jets least likely to be the bottom quarks originating from direct top quark decays and the invariant mass of this pair is used as the final observable in the search. No evidence for the presence of a charged Higgs boson is observed and upper limits at 95% confidence level of 0.8–0.5% are set on the branching fraction ℬ(t → H$^{+}$b), assuming ℬ(H$^{+}$ → $ \mathrm{c}\overline{\mathrm{b}} $ ) = 1.0 and ℬ(t → H$^{+}$b) + ℬ(t → Wb) = 1.0, for the charged Higgs boson mass range 90–150 GeV. Journal of high energy physics 1811(11), 115 (2018). doi:10.1007/JHEP11(2018)115 Published by Springer Nature, Cham

  • Open Access English
    Authors: 
    Penca; Jerneja;
    Publisher: Zenodo
    Project: EC | EL-CSID (693799)

    Across the policy discourses and academic literature, the popularity of the concept of “science diplomacy” has used the concept in an uncritical manner. This paper aims to understand the concept’s value-added and the implications of its use. It considers the evolution of scientific cooperation and its interaction with foreign policy in the Euro-Mediterranean region. It finds out that many of the goals currently enshrined in “science diplomacy” have already constituted the history of the Euro-Mediterranean relationships since the launch of the Euro-Mediterranean Partnership. The difference with the past is that the EU now has higher political and economic expectations of genuine scientific cooperation. However, in contrast to widening the objectives, the EU has not substantively broadened the tools it avails of. This leads us to expect that the EU’s actual policy in regional scientific cooperation might nevertheless stay the same. While the rhetoric of science diplomacy is of little use, the paper suggests some meaningful questions in the science-foreign policy nexus to replace it.

  • Publication . Other literature type . Article . Research . Preprint . 2021
    Open Access English
    Authors: 
    Fruehwirth, Rudolf; Wulz, Claudia-Elisabeth; Melo Da Costa, Eliza; BRANDAO MALBOUISSON, Helena; Tomei, Thiago; De Moraes Gregores, Eduardo; De Souza Lemos, Dener; Garcia Fuentes, Francisco Ignacio; AGRAM, Jean-Laurent; Brom, Jean-Marie; +193 more
    Publisher: North-Holland Publ.
    Countries: Belgium, Germany, Italy, Switzerland, Italy, Belgium, Belgium, Spain, France, Germany ...
    Project: EC | LHCTOPVLQ (752730), EC | INSIGHTS (765710), EC | AMVA4NewPhysics (675440)

    Measurements of the second Fourier harmonic coefficient (v2) of the azimuthal distributions of prompt and nonprompt D0 mesons produced in pp and pPb collisions are presented. Nonprompt D0 mesons come from beauty hadron decays. The data samples are collected by the CMS experiment at nucleon-nucleon center-of-mass energies of 13 and 8.16 TeV, respectively. In high multiplicity pp collisions, v2 signals for prompt charm hadrons are reported for the first time, and are found to be comparable to those for light-flavor hadron species over a transverse momentum (pT) range of 2–6 GeV. Compared at similar event multiplicities, the prompt D0 meson v2 values in pp and pPb collisions are similar in magnitude. The v2 values for open beauty hadrons are extracted for the first time via nonprompt D0 mesons in pPb collisions. For pT in the range of 2–5 GeV, the results suggest that v2 for nonprompt D0 mesons is smaller than that for prompt D0 mesons. These new measurements indicate a positive charm hadron v2 in pp collisions and suggest a mass dependence in v2 between charm and beauty hadrons in the pPb system. These results provide insights into the origin of heavy-flavor quark collectivity in small systems. Individuals have received support from the Marie-Curie program and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 752730, and 765710 (European Union); CERN; the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias. CMS Collaboration: et al. Funded by SCOAP3. Peer reviewed

  • Open Access English
    Authors: 
    Tsitsokas, Dimitrios; Kouvelas, Anastasios; id_orcid0000-0003-4571-2530; Geroliminis, Nikolas;
    Publisher: ETH Zurich
    Country: Switzerland
    Project: EC | DIT4TraM (953783)

    Traffic-responsive signal control is a cost-effective and easy-to-implement network management strategy with high potential in improving performance in congested networks with dynamic characteristics. Max Pressure (MP) distributed controller gained significant popularity due to its theoretically proven ability of queue stabilization and throughput maximization under specific assumptions. However, its effectiveness under saturated conditions is questionable, while network-wide application is limited due to high instrumentation cost. Perimeter control (PC) based on the concept of the Macroscopic Fundamental Diagram (MFD) is a state-of-the-art aggregated strategy that regulates exchange flows between regions, in order to maintain maximum regional travel production and prevent over-saturation. Yet, homogeneity assumption is hardly realistic in congested states, thus compromising PC efficiency. In this paper, the effectiveness of network-wide, parallel application of PC and MP embedded in a two-layer control framework is assessed with mesoscopic simulation. Aiming at reducing implementation cost of MP without significant performance loss, we propose a method to identify critical nodes for partial MP deployment. A modified version of Store-and-forward paradigm incorporating finite queue and spill-back consideration is used to test different configurations of the proposed framework, for a real large-scale network, in moderately and highly congested scenarios. Results show that: (i) combined control of MP and PC outperforms separate MP and PC applications in both demand scenarios; (ii) MP control in reduced critical node sets leads to similar or even better performance compared to full-network implementation, thus allowing for significant cost reduction; iii) the proposed control schemes improve system performance even under demand fluctuations of up to 20% of mean. arXiv

  • Open Access English
    Authors: 
    Köhler, Mila;
    Publisher: Mannheim: Zentrum für Europäische Wirtschaftsforschung (ZEW)
    Country: Germany
    Project: EC | SIMPATIC (290597)

    In Germany, R&D subsidies are an important tool to support innovation in the private sector. This paper studies the welfare effects of R&D subsidies distributed through the German federal government’s thematic R&D programs between 1994 and 2011. The analysis is based on a structural model of the R&D subsidy process which allows to estimate the benefits of R&D subsides to the German economy. The model takes into account heterogeneous application costs of firms and identifies the effect of the subsidy on the federal government’s utility as well as on firm profits. Assuming a welfare-maximizing federal government, the estimated average social rate of return is 34% for Germany in the period 1994 to 2011. Thereby effects on firm profits are similar to effects on spillovers to the rest of the German economy. Besides results show that the subsidy rate decision in Germany remained remarkably stable over time, and that application costs as well as the marginal profitability of subsidized R&D projects are lower after the year 2000 compared to the years before.

  • Open Access English
    Authors: 
    Sirunyan, Albert M; Tumasyan, Armen; Fruehwirth, Rudolf; Alves, Gilvan; Kim, Tae Jeong; Park, Jiwon; Cho, Sungwoong; Choi, Suyong; Go, Yeonju; Gyun, Dooyeon; +190 more
    Publisher: HAL CCSD
    Countries: Italy, United States, Switzerland, Italy, Italy, Italy, Italy, Germany, France, United Kingdom
    Project: EC | INSIGHTS (765710), EC | LHCTOPVLQ (752730), EC | AMVA4NewPhysics (675440)

    A search in an all-jet final state for new massive resonances decaying to $\text{ W }{}{}\text{ W }{}{}$, $\text{ W }{}{}\text{ Z }{}{}$, or $\text{ Z }{}{}\text{ Z }{}{}$ boson pairs using a novel analysis method is presented. The analysis is performed on data corresponding to an integrated luminosity of 77.3 $\,\text {fb}^{-1}$ recorded with the CMS experiment at the LHC at a centre-of-mass energy of 13 $\text {Te}\text {V}$. The search is focussed on potential narrow-width resonances with masses above 1.2 $\text {Te}\text {V}$, where the decay products of each $\text{ W }{}{}$ or $\text{ Z }{}{}$ boson are expected to be collimated into a single, large-radius jet. The signal is extracted using a three-dimensional maximum likelihood fit of the two jet masses and the dijet invariant mass, yielding an improvement in sensitivity of up to 30% relative to previous search methods. No excess is observed above the estimated standard model background. In a heavy vector triplet model, spin-1 ${\text {Z}}^{\prime }$ and ${\text {W}}^{\prime }$ resonances with masses below 3.5 and 3.8 $\text {Te}\text {V}$, respectively, are excluded at 95% confidence level. In a bulk graviton model, upper limits on cross sections are set between 27 and 0.2 $\,\text {fb}$ for resonance masses between 1.2 and 5.2 $\text {Te}\text {V}$, respectively. The limits presented in this paper are the best to date in the dijet final state. The European physical journal / C Particles and fields C 80(3), 237 (2020). doi:10.1140/epjc/s10052-020-7773-5 Published by Springer, Heidelberg

  • Publication . Article . Preprint . Other literature type . Research . 2020
    Open Access English
    Authors: 
    Salvatore Aiola; Simon Akar; Johannes Albrecht; Sandra Amato; G. Andreassi; John Back; Wander Baldini; William Barter; Fedor Baryshnikov; Jan-Marc Basels; +260 more
    Publisher: SpringerOpen
    Countries: Italy, United Kingdom, Netherlands, Italy, United Kingdom, France, Switzerland, Italy, Spain, Italy ...
    Project: EC | pANUCSTR (792684)

    A precision measurement of the $ {B}_c^{+} $ meson mass is performed using proton- proton collision data collected with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 9.0 fb$^{−1}$. The $ {B}_c^{+} $ mesons are reconstructed via the decays $ {B}_c^{+} $→ J/ψπ$^{+}$, $ {B}_c^{+} $→ J/ψπ$^{+}$π$^{−}$π$^{+}$, $ {B}_c^{+}\to J/\psi p\overline{p}{\pi}^{+} $, $ {B}_c^{+}\to J/\psi {D}_s^{+} $, $ {B}_c^{+} $→ J/ψ D$^{0}$K$^{+}$ and $ {B}_c^{+}\to {B}_s^0{\pi}^{+} $. Combining the results of the individual decay channels, the $ {B}_c^{+} $ mass is measured to be 6274.47 ± 0.27 (stat) ± 0.17 (syst) MeV/c$^{2}$. This is the most precise measurement of the $ {B}_c^{+} $ mass to date. The difference between the $ {B}_c^{+} $ and $ {B}_s^0 $ meson masses is measured to be 907.75 ± 0.37 (stat) ± 0.27 (syst) MeV/c$^2.$ Journal of high energy physics 07(7), 123 (1-20) (2020). doi:10.1007/JHEP07(2020)123 Published by SISSA, [Trieste]

  • Publication . Report . Conference object . Research . 2018
    Open Access English
    Authors: 
    Jaap van Milgen;
    Publisher: HAL CCSD
    Country: France
    Project: EC | Feed-a-Gene (633531)

    International audience

  • Open Access English
    Authors: 
    Kopelyan, Sofya; Nieth, Lisa Johanna;
    Country: Netherlands
    Project: EC | RUNIN (722295)

    A well-functioning regional innovation system involves a lot of communication and interaction among the actors. However, sometimes the communication and interaction create tensions impeding regional development. In order to explore the reasons behind this, this study looks at the relationships between key stakeholders in the Twente Region in the Netherlands. The region has an established reputation for innovation and entrepreneurship, a high inter-connectedness between the actors, and a strong knowledge infrastructure. The research focuses on the University of Twente as a key actor contributing to regional growth in close cooperation with various stakeholders. This is an introductory interview-based case study that identifies four areas of tension between the university and its regional stakeholders. Our inquiry sheds light on the misalignment of stakeholders’ interests and expectations that lessens the actors’ capacity for policy formulation and strategic agenda setting, as well as hinders its successful translation into action. Then, the absence of clear intermediaries significantly increases the perceived distance between the University of Twente and the Twente region and impedes the university’s collaboration with companies outside the science and business park. Next, the tension of discontinuity highlights the complexities of human resources and personalised networks – their diversity, multidimensionality, and overlaps make it harder to synchronise action and enhance reciprocal benefits. The knowledge asymmetry between the parties further complicates their communication and weakens commitment. In the end, the paper offers a few ideas for action for academic leaders and regional policymakers.

Send a message
How can we help?
We usually respond in a few hours.