1,452 research outputs found

    Co_3O_4 Nanoparticle Water-Oxidation Catalysts Made by Pulsed-Laser Ablation in Liquids

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    Surfactant-free, size- and composition-controlled, unsupported, <5-nm, quantum-confined cobalt oxide nanoparticles with high electrocatalytic oxygen-evolution activity were synthesized by pulsed laser ablation in liquids. These crystalline Co_3O_4 nanoparticles have a turnover frequency per cobalt surface site among the highest ever reported for Co_3O_4 nanoparticle oxygen evolution catalysts in base and overpotentials competitive with the best electrodeposited cobalt oxides, with the advantage that they are suitable for mechanical deposition on photoanode materials and incorporation in integrated solar water-splitting devices

    Observations of a ^3He-rich SEP Event over a Broad Range of Heliographic Longitudes: Results from STEREO and ACE

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    Observations of energetic ions and electrons from STEREO and ACE have been used to investigate the longitudinal extent of particle emissions from 3He ‐rich solar energetic particle (SEP) events. In the event of 3–4 Nov 2008, ions and electrons were detected 20° ahead and behind the nominal connection from the source region to 1 AU, and electrons were also detected 60° ahead. The results are consistent with those of earlier studies that correlated data from near‐Earth spacecraft with Helios data or with observations of source regions on the Sun

    The Black Hole of Transport Logistics Efficiency: A Multi-Method Study on Yard Management

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    ABSTRACT Yard management is crucial for warehouse efficiency, as it accelerates and aligns incoming and outgoing material flows at these sites. This is especially relevant in modern logistics and supply chain management because recent market trends demand increasing product assortments, which must be produced, processed, and delivered in ever shorter times. While efficiency improvements within warehouses have received considerable interest in operations management research, prior studies have generally failed to establish how to design and evaluate processes at warehouse sites. Research on decision prioritisation regarding critical sub-processes in yard management could offer interesting new insights, helping to increase overall warehouse efficiency through the prioritisation of critical optimisation sub-processes. Accordingly, this paper examines the prioritisation and evaluation of critical yard sub- processes for efficient yard management at warehouse sites. A multi-method research approach is applied, combining analytic hierarchy process (AHP) interviews with a detailed literature review and quantitative empirical data analysis to allow for triangulation of the results to develop theoretical contributions and practical implications. Five critical yard sub-processes are identified and prioritised: management of the shunting system, registration at the gateway, allocation of trucks to gates/parking spaces, removal of a transport unit from the gate, and exit control

    Measurement of the production cross section for W-bosons in association with jets in pp collisions at s=7 TeV with the ATLAS detector

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    This Letter reports on a first measurement of the inclusive W + jets cross section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC, with the ATLAS detector. Cross sections, in both the electron and muon decay modes of the W-boson, are presented as a function of jet multiplicity and of the transverse momentum of the leading and next-to-leading jets in the event. Measurements are also presented of the ratio of cross sections sigma (W + >= n)/sigma(W + >= n - 1) for inclusive jet multiplicities n = 1-4. The results, based on an integrated luminosity of 1.3 pb(-1), have been corrected for all known detector effects and are quoted in a limited and well-defined range of jet and lepton kinematics. The measured cross sections are compared to particle-level predictions based on perturbative QCD. Next-to-leading order calculations, studied here for n <= 2, are found in good agreement with the data. Leading-order multiparton event generators, normalized to the NNLO total cross section, describe the data well for all measured jet multiplicitie

    Breath detection using short-time Fourier transform analysis in electrical impedance tomography

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    Spectral analysis based on short-time Fourier transform (STFT) using Kaiser window is proposed to examine the frequency components of neonates EIT data. In this way, a simultaneous spatial-time-frequency analysis is achieved

    Measurement of top quark–antiquark pair production in association with a W or Z boson in pp collisions at √s=8 TeV

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    Observation of the diphoton decay of the Higgs boson and measurement of its properties

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    Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV

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    Search for anomalous Wtb couplings and flavour-changing neutral currents in t-channel single top quark production in pp collisions at root s=7 and 8 TeV

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