420 research outputs found
Search for a Standard Model Higgs boson produced in association with a W or Z boson decaying to bottom quarks
No full textA search for a Standard Model Higgs boson decaying to b produced in association with a W or Z boson is reported for the following channels W(e)H, W()H, W()H, Z(H, Z(ee)H, and Z()H. The search is performed on data samples corresponding to integrated luminosities of 5.1 at TeV and 18.9 at TeV, collected by the CMS experiement at the LHC. An excess of events is observed above the expected background with a local significance of 2.1 standard deviations for a Higgs boson with mass 125 GeV consistent with Standard Model expectations. The signal strength corresponding to this excess, relative to that of the Standard Model Higgs boson, was 0.89 0.43
Electroweak and QCD aspects in V+jets in CMS
No full textThe study of the associated production of vector bosons and jets constitutes an excellent testbench to check numerous QCD predictions. Total and differential cross sections of vector bosons produced in association with jets have been studied in pp collisions at 7, 8 and 13 TeV center-of-mass energies. Differential distributions as function of a broad range of kinematical observables are measured and compared with theoretical predictions. Final states with a vector boson and jets can be also used to study electroweak initiated processes, such as the vector boson fusion production of a Z or W boson that are accompanied by a pair of energetic jets with large invariant mass.The study of the associated production of vector bosons and jets constitutes an excellent testbench to check numerous QCD predictions. The most recent measurements of total and differential cross sections of vector bosons produced in association with jets are presented. Differential distributions as function of a broad range of kinematical observables are measured and compared with theoretical predictions. Final states with a vector boson and jets can be also used to study electroweak-initiated processes, such as the vector boson fusion production of a Z or W boson accompanied by a pair of energetic jets with large invariant mass. The study of these processes enables quantitative assessment of the reliability of the generator predictions for vector boson fusion topologies as well as stringent constraints on anomalous triple gauge coupling effective field theory parameters
Higgs Couplings in CMS in Run2
No full textThe latest results on Higgs boson couplings using Run-2 data collected by the CMS experiment are presented. These recent developments include the confirmation of what had been the two remaining third generation Yukawa couplings yet to be observed, the top quark and bottom quark couplings. Next, the latest search for the rare Higgs boson decay to a muon-antimuon pair is presented, which should soon give access to the first measurement of a second generation Yukawa coupling. The most stringent limit to date is then shown for the branching fraction of the Higgs boson to undetectable invisible signatures. Finally, the first search for the extremely rare decay of the Higgs boson to quarkonia is shown
BSM H searches and rare H decay searches at CMS and ATLAS
No full textSearches for rare Higgs boson decays and extensions of the Higgs sector beyond the standard model are key to probing the dynamics of electroweak symmetry breaking. With the large LHC Run-2 dataset, considerable progress has been made in probing the largely unexplored Higgs boson interactions with the lighter fermions, as well as in searching for signs of new physics in the Higgs sector with mass scales ranging from 100 MeV to several TeV. The results presented here are either brand new for this conference, or were released in the weeks just before
Characterization of pellicles formed by Acinetobacter baumannii at the air-liquid interface
No full textThe clinical importance of Acinetobacter baumannii is partly due to its natural ability to survive in the hospital environment.
This persistence may be explained by its capacity to form biofilms and, interestingly, A. baumannii can form pellicles at the
air-liquid interface more readily than other less pathogenic Acinetobacter species. Pellicles from twenty-six strains were
morphologically classified into three groups: I) egg-shaped (27%); II) ball-shaped (50%); and III) irregular pellicles (23%). One
strain representative of each group was further analysed by Brewster’s Angle Microscopy to follow pellicle development,
demonstrating that their formation did not require anchoring to a solid surface. Total carbohydrate analysis of the matrix
showed three main components: Glucose, GlcNAc and Kdo. Dispersin B, an enzyme that hydrolyzes poly-Nacetylglucosamine
(PNAG) polysaccharide, inhibited A. baumannii pellicle formation, suggesting that this exopolysaccharide
contributes to pellicle formation. Also associated with the pellicle matrix were three subunits of pili assembled by chaperonusher
systems: the major CsuA/B, A1S_1510 (presented 45% of identity with the main pilin F17-A from enterotoxigenic
Escherichia coli pili) and A1S_2091. The presence of both PNAG polysaccharide and pili systems in matrix of pellicles might
contribute to the virulence of this emerging pathogen
The Quest for Citations: Drivers of Article Impact
No full textWhy do some articles become building blocks for future scholars, while many others remain unnoticed? We aim to answer this question by contrasting, synthesizing and simultaneously testing three scientometric perspectives – universalism, social constructivism and presentation – on the influence of article and author characteristics on article citations. To do so, we study all articles published in a sample of five major journals in marketing from 1990 to 2002 that are central to the discipline. We count the number of citations each of these articles has received and regress this count on an extensive set of characteristics of the article (i.e. article quality, article domain, title length, the use of attention grabbers and expositional clarity), and the author (i.e. author visibility and author personal promotion). We find that the number of citations an article in the marketing discipline receives, depends upon “what one says†(quality and domain), on “who says it†(author visibility and personal promotion) and not so much on “how one says it†(title length, the use of attention grabbers, and expositional clarity). Our insights contribute to the marketing literature and are relevant to scientific stakeholders, such as the management of scientific journals and individual academic scholars, as they strive to maximize citations. They are also relevant to marketing practitioners. They inform practitioners on characteristics of the academic journals in marketing and their relevance to decisions they face. On the other hand, they also raise challenges towards making our journals accessible and relevant to marketing practitioners: (1) authors visible to academics are not necessarily visible to practitioners; (2) the readability of an article may hurt academic credibility and impact, while it may be instrumental in influencing practitioners; (3) it remains questionable whether articles that academics assess to be of high quality are also managerially relevant.Impact;Citation Analysis;Referencing;Scientometrics;Cite
How can allocative inefficiency reveal risk preference? An empirical investigation on French wheat farms
No full textWe focus on a simple framework on wheat producer behaviour in a context of price output uncertainty. More precisely, we establish a relationship between ex post output price level and allocative inefficiency that allows to characterize farmers’ risk preferences. Given this analysis, the connection between risk aversion and other socioeconomic variables (such as degree of output specialisation, total asset, debts, farmer’s age…) can furthermore empirically be explored. This relationship is empirically tested on an unbalanced panel including about 650 wheat producers located in the French Department of Meuse over 1992- 2003.Producer behaviour, allocative inefficiency, risk aversion, Crop Production/Industries, Risk and Uncertainty,
Uncertainty Quantification in Computational Electromagnetics: The stochastic approach
No full textModels in electromagnetism are more and more accurate. In some applications, the gap between the experience and the model comes from the deviation on input data of the model which are not perfectly known. The stochastic approach can be used to quantify the effect of these input data uncertainties on the outputs of the model. In this article, the application of such approach in computational electromagnetics is presented. The four steps development of the model, characterization and modeling of the input data variability, uncertainty quantification, postprocessing (sensitivity analysis) are described and illustrated by an example of electrical machine with uncertain dimensionsPole MEDEE (Nord Pas de Calais Region et European Union-FEDER) IAP P6/21 IPOLFE co funded by the belgium government Company Parnership : EDF R&D and VALEO System Electri
What Does the “Terrorist” Label Really Do? Measuring and Explaining the Effects of the “Terrorist” and “Islamist” Categories
No full textMany scholars and practitioners claim that labelling groups or individuals as “terrorists” does not simply describe them but also shapes public attitudes, due to the label's important normative and political charge. Yet is there such a “terrorist label effect”? In view of surprisingly scant evidence, the present paper evaluates whether or not the terrorist label – as well as the “Islamist” one – really impacts both the audience's perception of the security environment and its security policy preferences, and if yes, how and why. To do so, the article implements a randomized-controlled vignette experiment where participants (n = 481) first read one out of three press articles, each depicting a street shooting in the exact same way but labelling the author of the violence with a different category (“terrorist”/“shooter”/“Islamist”). Participants were then asked to report on both their perceptions and their policy preferences. This design reveals very strong effects of both the “terrorist” and “Islamist” categories on each dimension. These effects are analysed through the lenses of social and cognitive psychology, in a way that interrogates the use of the terrorist category in society, the conflation of Islamism with terrorism, and the press and policymakers’ lexical choices when reporting on political violence
From Visual Poetry to Digital Art: Image-Sound-Text, Convergent Media, and the development of New Media Languages
No full textThis research arises from my practice as a professional artist and my concern with issues of language and communication, particularly, the investigation of ways that arouse emotion and rational thought at once through language. Visual Poetry is a form of expression, which provokes both, and I saw the potential to expand its underlining principles further with the emergence of new technologies. With the digital medium, the main elements of visual and sound poetry: image, sound and text, can now be incorporated into the same piece of work.
The aim of this study is to explore new digital communicative systems that interweave visual, oral and semantic elements of language, to produce new media languages where the pre-linguistic and linguistic maintain their symbiotic identities. This study examines theoretical and artistic concerns emerging from the area in-between, which is created by interlacing image, sound and text in the same artwork.
It addresses the following series of questions:
How to transfer the main concepts from Visual Poetry to Digital Art?
How does computer technology transform image, sound and text to create new media languages?
What is the role of the author, reader, writer, producer in these new interactive textualities of image, sound and text?
How has this affected the new conventions of reading, looking, producing, using and thinking?
What does the digital add to the interactivelexts of Visual Poetry? What new meanings and processes of thinking, understanding and interpretation are appearing?
In which way do new technologies enhance the collaborative nature of practice?
This investigation brings knowledge from other disciplines into the art field and it explores different serniotic models such as the linguistic the visual and the aural. It blurs the barriers between the visual and the linguistic: between different art forms such as fine art, visual poetry and sound art/poetry in a new digital and technological arena. It questions the conventions applied to these critical areas with the aid of the new tools and critical concepts available through digital technology. This study challengest he viewer/listener/userw ith an interface of signsf rom different languages and serniotic systems: the visual (still and moving images), the audible and the linguistic, to participate and explore the multiple possibilities within a work. This investigation seeks to contribute to a new body of knowledge in the
development of the areas of Visual Poetry, Digital Art and the new genre of Electronic Poetry, by creating new, innovative, digital artworks for which, as a new form of expression, critical and analytical conventions are still in the process of development
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