69 research outputs found
Neither essence nor accident: Situated knowledge and its importance for the community broker
The paper describes the design of the Community Broker as a case study for the development of a tool attempting to support individual web-search strategies by using the community-based nature of a great deal of information exchange and learning. Community experiences affect the understanding, validation and organization of individual knowledge. Communities affecting the representation of knowledge frame the every-day decisions individuals have to take in spite of incomplete, insecure knowledge and the vagueness of communicating in natural languages. As for the often distributed, fragmented and heterogeneous nature of knowledge and related problems of information search in the internet - some of which are described in the paper - technical tools can support information search, when the influence of community-based identities upon knowledge representation and -identification is used as a source of additional information instead of being ignored
Digitalisierung und ihr Einfluss auf Arbeit und Qualifizierung in kleinen metallbearbeitenden Unternehmen Nordrhein-Westfalens
Ziel der Studie war die exemplarische Erforschung des Einflusses der Digitalisierung in kleinen metallbearbeitenden Betrieben in NRW auf Arbeit und Qualifizierung. Betriebsangehörige wurden befragt, einzelne im Rahmen einer Projektethnografie interviewt. Nach den Methoden werden die FÀlle beschrieben und Handlungsempfehlungen abgeleitet. In den beforschten KMUs war QualitÀtssteigerung Ziel der Digitalisierung, nicht Vollautomatisierung. Neben individueller Qualifizierung erforderte dies organisationales Lernen.The aim of the study was to exemplarily investigate the influence of digitization in small metalworking companies in NRW on work and qualifications. Employees were questioned, some of them interviewed within the framework of project ethnography. First, the methods are described, then the cases and, finally, the derived recommendations for action. In the researched SMEs quality improvement (not full automation) is the goal. Digitization requires both individual qualifications and organizational learning
Mitarbeiterqualifizierung fĂŒr digitalisierte Arbeit: Eine empirische Studie in metallverarbeitenden KMU in Nordrhein-Westfalen
Die untersuchten kleinen und mittleren Unternehmen (KMU) interessieren sich in unterschiedlichem MaĂe fĂŒr Industrie 4.0. Die Mitarbeiter_innen sehen Investitionen in zukunftsfĂ€hige Digitalisierungskomponenten meist positiv. Schulungen der Anlagen- und Werkzeughersteller spielen in der Qualifizierung eine zentrale Rolle; sie vermitteln neben herstellerspezifischem auch allgemeines Wissen. Ein erfolgversprechender Weg zur Gestaltung von Arbeit und Qualifizierung scheint die Einbeziehung von Mitarbeiter_innen und technischen Expert_innen zu sein
Socio-Informatics
Contents
Editorial
Thematic Focus: Socio-Informatics
Introduction to the Thematic Focus âSocio-Informaticsâ / Claudia MĂŒller
Digitalisation in Small German Metal-Working Companies. Appropriation of Technology in a âTraditionalâ Industrial Domain / Bernhard Nett, Jennifer Bönsch
Travelling by Taxi Brousse in Madagascar: An Investigation into Practices of Overland Transportation / Volker Wulf, Kaoru Misaki, Dave Randall, and Markus Rohde
Mobile and Interactive Media in the Store? Design Case Study on Bluetooth Beacon Concepts for Food Retail / Christian Reuter, Inken Leopold
Facebook and the Mass Media in Tunisia / Konstantin Aal, Marén Schorch, Esma Ben Hadj Elkilani, Volker Wulf
Book Review Symposium Charles Goodwin
Charles Goodwinâs Co-Operative Action: The Idea and the Argument / Erhard SchĂŒttpelz, Christian Meyer
Multi-Modal Interaction and Tool-Making: Goodwinâs Intuition / Christian Meyer, Erhard SchĂŒttpelz
Co-Operation is a Feature of Sociality, not an Attribute of People : âWe inhabit each otherâs actions.â (Goodwin, cover) / Jutta Wiesemann, Klaus Amann
The Making of the World in Co-Operative Action. From Sentence Construction to Cultural Evolution / JĂŒrgen Streeck
On Goodwin and his Co-Operative Action / Jörg R. Bergman
Search for Neutral Higgs Bosons in Events with Multiple Bottom Quarks at the Tevatron
The combination of searches performed by the CDF and D0 collaborations at the
Fermilab Tevatron Collider for neutral Higgs bosons produced in association
with b quarks is reported. The data, corresponding to 2.6 fb-1 of integrated
luminosity at CDF and 5.2 fb-1 at D0, have been collected in final states
containing three or more b jets. Upper limits are set on the cross section
multiplied by the branching ratio varying between 44 pb and 0.7 pb in the Higgs
boson mass range 90 to 300 GeV, assuming production of a narrow scalar boson.
Significant enhancements to the production of Higgs bosons can be found in
theories beyond the standard model, for example in supersymmetry. The results
are interpreted as upper limits in the parameter space of the minimal
supersymmetric standard model in a benchmark scenario favoring this decay mode.Comment: 10 pages, 2 figure
Search for the standard model Higgs boson decaying to a pair in events with no charged leptons and large missing transverse energy using the full CDF data set
We report on a search for the standard model Higgs boson produced in
association with a vector boson in the full data set of proton-antiproton
collisions at TeV recorded by the CDF II detector at the
Tevatron, corresponding to an integrated luminosity of 9.45 fb. We
consider events having no identified charged lepton, a transverse energy
imbalance, and two or three jets, of which at least one is consistent with
originating from the decay of a quark. We place 95% credibility level upper
limits on the production cross section times standard model branching fraction
for several mass hypotheses between 90 and . For a Higgs
boson mass of , the observed (expected) limit is 6.7
(3.6) times the standard model prediction.Comment: Accepted by Phys. Rev. Let
Search for the standard model Higgs boson decaying to a bb pair in events with one charged lepton and large missing transverse energy using the full CDF data set
We present a search for the standard model Higgs boson produced in
association with a W boson in sqrt(s) = 1.96 TeV p-pbar collision data
collected with the CDF II detector at the Tevatron corresponding to an
integrated luminosity of 9.45 fb-1. In events consistent with the decay of the
Higgs boson to a bottom-quark pair and the W boson to an electron or muon and a
neutrino, we set 95% credibility level upper limits on the WH production cross
section times the H->bb branching ratio as a function of Higgs boson mass. At a
Higgs boson mass of 125 GeV/c2 we observe (expect) a limit of 4.9 (2.8) times
the standard model value.Comment: Submitted to Phys. Rev. Lett (v2 contains clarifications suggested by
PRL
Search for the standard model Higgs boson decaying to a bb pair in events with two oppositely-charged leptons using the full CDF data set
We present a search for the standard model Higgs boson produced in
association with a Z boson in data collected with the CDF II detector at the
Tevatron, corresponding to an integrated luminosity of 9.45/fb. In events
consistent with the decay of the Higgs boson to a bottom-quark pair and the Z
boson to electron or muon pairs, we set 95% credibility level upper limits on
the ZH production cross section times the H -> bb branching ratio as a function
of Higgs boson mass. At a Higgs boson mass of 125 GeV/c^2 we observe (expect) a
limit of 7.1 (3.9) times the standard model value.Comment: To be submitted to Phys. Rev. Let
Combined Tevatron upper limit on gg->H->W+W- and constraints on the Higgs boson mass in fourth-generation fermion models
Report number: FERMILAB-PUB-10-125-EWe combine results from searches by the CDF and D0 collaborations for a standard model Higgs boson (H) in the process gg->H->W+W- in p=pbar collisions at the Fermilab Tevatron Collider at sqrt{s}=1.96 TeV. With 4.8 fb-1 of integrated luminosity analyzed at CDF and 5.4 fb-1 at D0, the 95% Confidence Level upper limit on \sigma(gg->H) x B(H->W+W-) is 1.75 pb at m_H=120 GeV, 0.38 pb at m_H=165 GeV, and 0.83 pb at m_H=200 GeV. Assuming the presence of a fourth sequential generation of fermions with large masses, we exclude at the 95% Confidence Level a standard-model-like Higgs boson with a mass between 131 and 204 GeV.We combine results from searches by the CDF and D0 collaborations for a standard model Higgs boson (H) in the process ggâHâW+W- in ppÌ
collisions at the Fermilab Tevatron Collider at âs=1.96ââTeV. With 4.8ââfb-1 of integrated luminosity analyzed at CDF and 5.4ââfb-1 at D0, the 95% confidence level upper limit on Ï(ggâH)ĂB(HâW+W-) is 1.75 pb at mH=120ââGeV, 0.38 pb at mH=165ââGeV, and 0.83 pb at mH=200ââGeV. Assuming the presence of a fourth sequential generation of fermions with large masses, we exclude at the 95% confidence level a standard-model-like Higgs boson with a mass between 131 and 204 GeV.Peer reviewe
Tevatron Run II combination of the effective leptonic electroweak mixing angle
Drell-Yan lepton pairs produced in the process pp[over ÂŻ]âââșââ»+X through an intermediate Îł*/Z boson have an asymmetry in their angular distribution related to the spontaneous symmetry breaking of the electroweak force and the associated mixing of its neutral gauge bosons. The CDF and D0 experiments have measured the effective-leptonic electroweak mixing parameter sinÂČΞ[subscript eff][superscript lept] using electron and muon pairs selected from the full Tevatron proton-antiproton data sets collected in 2001-2011, corresponding to 9â10ââfbâ»Âč of integrated luminosity. The combination of these measurements yields the most precise result from hadron colliders, sinÂČΞ[subscript eff][superscript lept] = 0.23148±0.00033. This result is consistent with, and approaches in precision, the best measurements from electron-positron colliders. The standard model inference of the on-shell electroweak mixing parameter sinÂČΞ[subscript W], or equivalently the W-boson mass M[subscript W], using the zfitter software package yields sinÂČΞ[subscript W] = 0.22324±0.00033 or equivalently, M[subscript W] = 80.367±0.017ââGeV/cÂČ
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