1,709 research outputs found

    Dialogue and professionalism in the contemporary organization

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    The dynamic changes as an integral part of everyday life are highly characteristic for the workplace. On the other hand, differences in cultural norms and values affect the changes specifically and add a different dimension to the processes that form the individual professionalism and the new reality in organizations expressed through collective intelligence. One of the resources for their formation is the dialogue. According to the varieties of dialogic interaction there are three types of dialogic subject and according to the prevailing type of individuals - three types of organizationsyesBelgorod State Universit

    Epaisseur optimale de l'absorbeur

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    Energy bounds for codes and designs in Hamming spaces

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    We obtain universal bounds on the energy of codes and for designs in Hamming spaces. Our bounds hold for a large class of potential functions, allow unified treatment, and can be viewed as a generalization of the Levenshtein bounds for maximal codes.Comment: 25 page

    Superconducting BSCCO Ceramics as Additive to the Zinc Electrode Mass in the Rechargeable Nickel-Zinc Batteries

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    The electronic conductivity of the main component of the zinc electrode in the rechargeable zinc-nickel battery – ZnO,  is rather poor and this is the main reason for the electrochemical heterogeneity of the anode mass and the loss of active surface area during charge/discharge cycling with a corresponding negative effect on the electrode characteristics In the present work, the possibility of application of superconductive cuprate Bi-Pb-Sr-Ca-Cu-O (BSCCO) ceramic as a multifunctional conductive additive to the zinc electrode mass is studied. Powder samples of the BSCCO ceramic Bi1,7Pb0,3Sr2Ca2Cu3Ox are produced by two-stage solid-state synthesis and they are physicochemically characterized. The XRD patterns and SEM observation reveal a well crystallized single phase of superconducting 2212 BSCCO system with average crystallite size 5-10 µm. The chemical stability of BSCCO ceramics in highly alkaline medium of the Ni-Zn battery is confirmed by structural and morphological analysis (XRD, SEM and EDX) of the samples before and after prolong exposure (96 h) to 7M KOH. The electrochemical tests are carried out by a specially designed prismatic alkaline Ni-Zn battery cell with conventional sintered type nickel electrodes and pasted zinc electrode with active electrode mass based on ZnO (88 wt.%) and addition of BSCCO powder or acetylene black as conductive additives. The study show that the zinc electrode with BSCCO superconducting ceramic additive exhibits very good cycleability, remarkable capacity stability and much higher discharge capacity at prolong charge/discharge cycling in comparison to the  zinc electrode with the “classic” carbon conductive additive. It is suggested that the addition of BSCCO ceramics improves not only conductivity of the electrode mass and reduces the gas evolution but also stabilizes porosity structure. The results obtained prove the possibility of application of superconducting BSCCO ceramics as a multifunctional additive to the active mass of the zinc electrodes for alkaline battery systems

    Phase formation and catalytic activity of Cu-Co-spinel catalyst deposited on Al/Si/Mg -support

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    The paper is devoted to Cu-Co oxide catalysts deposited on a commercially available high-temperature support containing aluminum, magnesium and silicon, calcined at different temperatures: 350, 450, 550, 650 and 750 o С. The samples are prepared by impregnation with aqueous solutions of Cu and Co nitrates. The catalysts are characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), differential thermal analysis (DTA), and BET method. Chemical analysis of the samples is also carried out. The phase formation at different preparation temperatures and the catalytic activity of copper cobaltite in the reaction of CO oxidation with oxygen at two space velocities (20 000 and 100 000 h -1 ) are investigated. The stability of the specimens to catalytic poisons at the same space velocities is studied. It is established that the most promising catalysts regarding the catalytic activity and stability to poisoning with SO2 are the catalysts calcined in the range 350 -550 o С. At these temperatures a Cu-Co oxide spinel -like phase is formed. These results give us the reason to suppose a possible implementation of the high-temperature support in the preparation of catalysts for the purification of toxic emissions of gaseous fluids in the practice

    Xanthates: Metabolism by Flavoprotein-Containing Monooxygenases and Antimycobacterial Activity.

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    Ethionamide (ETH) plays a central role in the treatment of tuberculosis in patients resistant to the first-line drugs. The ETH, thioamide, and thiourea class of antituberculosis agents are prodrugs that are oxidatively converted to their active S-oxides by the mycobacterial flavin-dependent monooxygenase (EtaA) of Mycobacterium tuberculosis, thus initiating the chain of reactions that result in inhibition of mycolic acid biosynthesis and cell lysis. As part of a search for new lead candidates, we report here that several xanthates are oxidized by purified EtaA to S-oxide metabolites (perxanthates), which are implicated in the antimycobacterial activity of these compounds. This process, which is analogous to that responsible for activation of ETH, is also catalyzed by human flavoprotein monooxygenase 3. EtaA was not inhibited in a time-dependent manner during the reaction. Xanthates with longer alkyl chains were oxidized more efficiently. EtaA oxidized octyl-xanthate (Km = 5 µM; Vmax = 1.023 nmolP/min; kcat = 5.2 molP/min/molE) more efficiently than ETH (194 µM; 1.46 nmolP/min; 7.73 nmolP/min/molE, respectively). Furthermore, the in vitro antimycobacterial activity of four xanthates against M. tuberculosis H37Hv was higher (minimum inhibitory concentration of around 1 µM) than that of ETH (12 µM)

    From Marketing to Performing the Market: The Emerging Role of Digital Data in the Independent Film Business

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    New consumption patterns and the impact of piracy are radically disrupting the independent film business, reducing revenues and increasing competition. However, innovative producers are responding by leveraging digital marketing and distribution technologies to develop new ways of creating awareness and delivering films to audiences. The creation and application of tools for direct audience engagement is changing the way the industry is organised and how market activity is managed. Producers are able to use film trailers as ‘socially distributed points-of-sale’ and extra-filmic content throughout a film’s life to develop interest, capture data and exploit intellectual property rights internationally. This chapter presents a detailed case study of two feature documentaries to provide insight into emergent technological, economic and organisational developments in film marketing practice. We analyse the financing and implementation of campaigns that use spreadable Video-on-Demand tools, social media outreach strategies and data management processes. This research contributes new evidence to demonstrate the evaluative and mediating role of Digital Engagement Metrics in terms of market performativity, the productive shaping of economic transactions
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