425 research outputs found

    Requirements on the engineering of advanced standby strategies in automobile production

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    Part of: Seliger, Günther (Ed.): Innovative solutions : proceedings / 11th Global Conference on Sustainable Manufacturing, Berlin, Germany, 23rd - 25th September, 2013. - Berlin: Universitätsverlag der TU Berlin, 2013. - ISBN 978-3-7983-2609-5 (online). - http://nbn-resolving.de/urn:nbn:de:kobv:83-opus4-40276. - pp. 165–170.A key challenge in manufacturing industry within the next years is to reduce and optimize energy consumption of production systems without affecting productivity. To adress this problem, different approaches are discussed, such as smart grids, or utilization of more energy-efficient machine components. A new approach on shop floor level is to optimize production control strategies, to power down inactive machine components during non productive phases. To fully exploit this potential, it is necessary to integrate the planning of the required control systems into all phases of the engineering process. This paper presents a concept for the integrated engineering of these new applications by evaluating planning tools, methods and data models regarding their suitability to implement the concept of advanced power down and restart concepts. In conclusion, requirements on these tools, methods and data models are defined, to empower them for optimal support of the future engineering process

    Communications Policy for 2006 and Beyond

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    In this Article, the Authors propose sweeping changes to the current telecommunications regulatory regime. With impending reform in telecommunications laws, the Authors argue that an important first step is the creation of a bipartisan, independent commission to examine and recommend implementation of more market-oriented communications policy. Through maximizing the operation of the markets, the authors argue that communications policy will better serve its goals of increasing business productivity and consumer welfare through the better services and lower prices. Important steps to achieve optimal market operation include deregulating retail prices where multifirm competition is available, minimizing the cost of public property inputs, overhauling universal service, assigning greater jurisdictional authority to federal regulators, and significantly reorganizing the FCC. The Authors argue that the timely implementation of these policies is crucial for achieving United States telecommunications policy goals

    Communications Policy for 2006 and Beyond

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    In this Article, the Authors propose sweeping changes to the current telecommunications regulatory regime. With impending reform in telecommunications laws, the Authors argue that an important first step is the creation of a bipartisan, independent commission to examine and recommend implementation of more market-oriented communications policy. Through maximizing the operation of the markets, the authors argue that communications policy will better serve its goals of increasing business productivity and consumer welfare through the better services and lower prices. Important steps to achieve optimal market operation include deregulating retail prices where multifirm competition is available, minimizing the cost of public property inputs, overhauling universal service, assigning greater jurisdictional authority to federal regulators, and significantly reorganizing the FCC. The Authors argue that the timely implementation of these policies is crucial for achieving United States telecommunications policy goals

    Disruptive Momentum: The Value of Implementing Best Practices in Health Research Postdoctoral Mentorship

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    COVID-19 called attention to the challenges postdoctoral fellows in health research face when they have times of prolonged disruption or changes in work conditions; this disruption revealed key insights on how mentors, fellows, and their institutions can work together to ensure training continuity. To prepare strong scientists, postdoctoral fellowships need mentoring, training, and networking opportunities to enhance fellows’ professional and skill development. In this article we outline potential solutions to minimize the impact of disruptions while promoting adaptable postdoctoral fellowship experiences by addressing how mentors and fellows alike can intervene on three key aspects of fellowships in health research: mentorship, training, and networking

    Assessment of an Innovative Medication Adherence Training Exercise in an Interprofessional Training Program

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    OBJECTIVE To assess the effect of an innovative training exercise on post-graduate healthcare trainees’ knowledge and perspectives of medication adherence and skills gained within an interprofessional training program. METHODS Postgraduate trainees (medicine, pharmacy, advanced practice nursing, and mental health) at the Michael E. DeBakey VA Medical Center’s Center of Excellence in Primary Care Education interprofessional training program participated in a medication adherence exercise and training session. The session included a formal PowerPoint presentation, an innovative medication adherence simulation exercise, clinical scenarios, and a journal club. Verbal feedback during the debriefing session occurred after the medication adherence simulation exercise and throughout the session. RESULTS Six trainees participated in the exercise and training session (2 medical residents, 2 nurse practitioner residents, 1 pharmacy resident, and 1 clinical psychology fellow). Trainees reported developing a greater understanding for barriers patients face with medication adherence, empathy, and strategies to manage patients’ medication adherence. CONCLUSIONS The medication adherence exercise and training session provided an opportunity for healthcare professionals from different professions to discuss medication adherence and share their educational training and previous clinical experiences within an interprofessional training program

    Intrinsic Photoconductivity of Ultracold Fermions in Optical Lattices

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    We report on the experimental observation of an analog to a persistent alternating photocurrent in an ultracold gas of fermionic atoms in an optical lattice. The dynamics is induced and sustained by an external harmonic confinement. While particles in the excited band exhibit long-lived oscillations with a momentum dependent frequency a strikingly different behavior is observed for holes in the lowest band. An initial fast collapse is followed by subsequent periodic revivals. Both observations are fully explained by mapping the system onto a nonlinear pendulum.Comment: 5+7 pages, 4+4 figure

    Multi-Locus Phylogenetic Analyses of the Almadablennius Clade Reveals Inconsistencies with the Present Taxonomy of Blenniid Fishes

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    We used a multi-locus phylogenetic approach (i.e., combining both mitochondrial and nuclear DNA fragments) to address some long-standing taxonomic inconsistencies within the diverse fish clade of Combtooth Blennies (Blenniidae—unranked clade Almadablennius). The obtained phylogenetic trees revealed some major inconsistencies in the current taxonomy of Parablennini, such as the paraphyletic status of the Salaria and Parablennius genera, casting some doubt regarding their actual phylogenetic relationship. Furthermore, a scarce-to-absent genetic differentiation was observed among the three species belonging to the genus Chasmodes. This study provides an updated taxonomy and phylogeny of the former genus Salaria, ascribing some species to the new genus Salariopsis gen. nov., and emphasizes the need for a revision of the genus Parablennius

    PSGL-1 engagement by E-selectin signals through Src kinase Fgr and ITAM adapters DAP12 and FcRγ to induce slow leukocyte rolling

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    E-selectin binding to P-selectin glycoprotein ligand-1 (PSGL-1) can activate the β2 integrin lymphocyte function-associated antigen-1 by signaling through spleen tyrosine kinase (Syk). This signaling is independent of Gαi-protein–coupled receptors, results in slow rolling, and promotes neutrophil recruitment to sites of inflammation. However, the signaling pathways linking E-selectin engagement of PSGL-1 to Syk activation are unknown. To test the role of Src family kinases and immunoreceptor tyrosine-based activating motif (ITAM)–containing adaptor proteins, we used different gene-deficient mice in flow chamber, intravital microscopy, and peritonitis studies. E-selectin–mediated phosphorylation of Syk and slow rolling was abolished in neutrophils from fgr−/− or hck−/− lyn−/− fgr−/− mice. Neutrophils from Tyrobp−/− Fcrg−/− mice lacking both DAP12 and FcRγ were incapable of sustaining slow neutrophil rolling on E-selectin and intercellular adhesion molecule-1 and were unable to phosphorylate Syk and p38 MAPK. This defect was confirmed in vivo by using mixed chimeric mice. Gαi-independent neutrophil recruitment into the inflamed peritoneal cavity was sharply suppressed in Tyrobp−/− Fcrg−/− mice. Our data demonstrate that an ITAM-dependent pathway involving the Src-family kinase Fgr and the ITAM-containing adaptor proteins DAP12 and FcRγ is involved in the initial signaling events downstream of PSGL-1 that are required to initiate neutrophil slow rolling

    Benzo[1,2-b:4,5-b′]dithio­phene-4,8-dione

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    The title mol­ecule, C10H4O2S2, is situated on a crystallographic center of inversion. In the crystal, weak hydrogen bonding contributes to the packing of the mol­ecules

    Alignment dependent chemisorption of vibrationally excited CH4(ν3) on Ni(100), Ni(110), and Ni(111)

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    International audienceWe present a stereodynamics study of the dissociative chemisorption of vibrationally excited methane on the (100), (110), and (111) planes of a nickel single crystal surface. Using linearly polarized infrared excitation of the antisymmetric C-H stretch normal mode vibration (ν3), we aligned the angular momentum and C-H stretch amplitude of CH4(ν3) in the laboratory frame and measured the alignment dependence of state-resolved reactivity of CH4 for the ν3 = 1, J = 0-3 quantum states over a range of incident translational energies. For all three surfaces studied, in-plane alignment of the C-H stretch results in the highest dissociation probability and alignment along the surface normal in the lowest reactivity. The largest alignment contrast between the maximum and minimum reactivity is observed for Ni(110), which has its surface atoms arranged in close-packed rows separated by one layer deep troughs. For Ni(110), we also probed for alignment effects relative to the direction of the Ni rows. In-plane C-H stretch alignment perpendicular to the surface rows results in higher reactivity than parallel to the surface rows. The alignment effects on Ni(110) and Ni(100) are independent of incident translational energy between 10 and 50 kJ/mol. Quantum state-resolved reaction probabilities are reported for CH4(ν3) on Ni(110) for translational energies between 10 and 50 kJ/mol
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