178,543 research outputs found
LASA PA component documentation
No full textHere you can find the additional information for constructing the Physical Activity (PA) components with LASA data. For more info on LASA PA data, visit: https://lasa-vu.nl/topics/physical-activity/
The components consist of 1) duration, 2) lower body muscle strength, 3) intensity of the activity, 4) mechanical strain, and 5) turning actions. Rationale, code, and evaluation of these components are described, as well as the R code for pre-processing the LASA PA data in order to run the algorithm for constructing the PA component scores
LASA-R: Location-Aware Scheduling Algorithm With Rescheduling for Industrial IoT Networks With Mobile Nodes
No full textThe synchronized single-hop multiple gateway (SHMG) framework has been recently proposed to support mobility in 6TiSCH, the network architecture defined by the IETF for the Industrial Internet of Things (IIoT). SHMG includes a scheduling policy to allocate communication resources to mobile nodes (MNs) in order to satisfy the stringent requirements of industrial applications. Current scheduling algorithms, however, manage mobility by simply over-allocating communication resources, without taking into account the position of MNs. In this article, we propose a location-aware scheduling algorithm with rescheduling (LASA-R) that leverages the position of MNs, reported via periodic position notification (PN) messages, to optimize the allocation of communication resources. LASA-R also includes a conflict resolution mechanism to modify the schedule, as conflicts are detected. Finally, a mathematical methodology is developed to determine the optimal PN period. LASA-R is assessed through simulations. The results obtained show that it can guarantee a high reliability and a bounded latency, even with a very large number of MNs
R&D on High QE Photocathodes at INFN LASA
No full textWe present the recent activities on antimonide and telluride alkali based photocathodes at INFN LASA. The R on Cs₂Te materials is focused on investigating effects of material thickness and growth procedures on the photocathodes performances during operation in RF guns. We aim to improve thermal emittance and long term stability of these films. The more recent work on alkali antimonide showed the need for substantial improvements in stability and QE during operation. We present here our recent achievements and plans for future activities
Photocathode Activities at INFN LASA
No full textWe present the activity on alkali antimonide photocathodes at INFN LASA. The long term goal is to transfer to these photocathodes the know-how acquired in the successful development of cesium telluride photocathodes, nowadays used in many leading FEL facilities and accelerator complex. In this paper we present and discuss the results so far obtained on alkali antimonide films grown in our R system and the status of the new preparation system specifically designed for these sensitive materials
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Amyloid structures as biofilm matrix scaffolds
No full textRecent insights into bacterial biofilm matrix structures have induced a paradigm shift toward the recognition of amyloid fibers
as common building block structures that confer stability to the exopolysaccharide matrix. Here we describe the functional amyloid
systems related to biofilm matrix formation in both Gram-negative and Gram-positive bacteria and recent knowledge regarding
the interaction of amyloids with other biofilm matrix components such as extracellular DNA (eDNA) and the host immune
system. In addition, we summarize the efforts to identify compounds that target amyloid fibers for therapeutic purposes
and recent developments that take advantage of the amyloid structure to engineer amyloid fibers of bacterial biofilm matrices for
biotechnological applications.This work, including the efforts of Jaione Valle, was funded by Ministerio
de Economía y Competitividad (MINECO) (AGL2011-23954). This
work, including the efforts of Íñigo Lasa, was funded by Ministerio de
Economía y Competitividad (MINECO) (BIO2011-30503-C02-02 and
BIO2014-53530-R)
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
The preparation of the LASA test station for the SIS300 model dipole
No full textThe FAIR facility, under development at GSI, includes the synchrotron SIS300 (300 Tm rigidity). In order to reach the required high intensities of proton and heavy ions beams, the bending dipole magnets have to be pulsed from the injection magnetic field of 1.5 T up to 4.5 T maximum field at the rate of 1 T/s in a 100 mm diameter bore. The first 3.9 m long model dipole is in advanced construction and a functional test is foreseen at LASA Lab. This test will be performed inside a vertical cryostat in boiling helium at 4.2 K, and it is aimed to verify the operation of the magnet, also in pulsed regime, and to assess the losses. A final full characterization of the magnet will be performed later in a laboratory equipped for operation at the design conditions, i.e. supercritical helium at 4.7 K. This paper illustrates the design and the installation activity of the test station and its capabilities at LASA
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Fabrication and Results of the First MgB2 Round Coil Superferric Magnet at LASA
No full textThe LASA Laboratory (INFN, Milan) is working in the High Luminosity LHC program to develop, in collaboration with CERN, six different types of High Order corrector magnets. In this framework, in parallel with a conventional design of superferric magnets with LTS conductor, the LASA is focusing on the research of new superconducting materials which may have applications in particle accelerator magnets. To this purpose, LASA is developing a new type of superferric magnet suitable to arbitrary multipole order, called Round Coil Superferric Magnets (RCSM). The iron yoke shaped with an arbitrary number of poles is able to create the desired harmonic component using only one single round coil with a large bending radius suitable for very strain-sensitive superconductors. The electromagnetic design of a sextupole configuration of the magnet and the production of the first superconducting MgB2 round coil prototype have been already presented. In this paper, we expose the optimization of the iron yoke and polar expansions assembly of the first magnet semi-module prototype. The results of the whole powering test are described in detail and the analysis of the magnetic performances are compared with those of classical superferric correctors
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