Search results for "git"
showing 10 items of 7116 documents
Synthetic aperture microscopy using off-axis illumination and polarization coding
2007
A new method to improve the resolution of optical imaging systems beyond the classical Rayleigh resolution limit is presented. The technique relies on synthetic aperture generation in three stages. The first one (encoding stage) uses an illumination procedure that combines both on-axis and off-axis illumination beams with different polarization states onto the object. After the imaging system, a second stage (decoding stage) allows the recovering of the encoded spatial-frequency object information by means of an interferometric configuration based on the polarization coding carried out in the previous stage. Finally, a third stage (digital post-processing stage) is used to generate a synthe…
Integration of GMR sensors with different technologies
2016
Less than thirty years after the giant magnetoresistance (GMR) effect was described, GMR sensors are the preferred choice in many applications demanding the measurement of low magnetic fields in small volumes. This rapid deployment from theoretical basis to market and state-of-the-art applications can be explained by the combination of excellent inherent properties with the feasibility of fabrication, allowing the real integration with many other standard technologies. In this paper, we present a review focusing on how this capability of integration has allowed the improvement of the inherent capabilities and, therefore, the range of application of GMR sensors. After briefly describing the …
Factors Contributing to the Business Digital Divide: A Systematic Literature Review
2021
The main aim of this study is to review the literature relating to the factors that contribute to the business digital divide. A systematic literature review was conducted using two databases (Scopus and Web of Science). A total of 28 articles were selected and analyzed. The selected studies are conducted in various developing and developed countries, including all firm sizes and different sectors, and cover several different digital technologies. Identified factors determining the business digital divide are categorized as technological, organizational, and environmental factors. The discussion and the potentials for further research are also presented.
Digital preservation in institutional repositories: a systematic literature review
2021
Purpose This paper aims to carry out a literature review on the implementation of digital preservation policies, strategies and actions by institutional repositories. The objective is to identify, out of the published experiences, at which level they are fulfilling the function of ensuring the long-term availability of the deposited materials. Design/methodology/approach Using a systematic literature review methodology, a total of 21 articles from international refereed journals published between 2009 and 2020 are reviewed. Findings The research production on this subject is very limited. The scarce number of published articles proves that the interest of repository managers has been focus…
First record ofColoborhynchus (Pterosauria) from the Santana Formation (Lower Cretaceous) of the Chapada do Araripe, Brazil
2001
The anterior tips of associated upper and lower jaws of a pterosaur from the Lower Cretaceous of Brazil are described and assigned to the taxonColoborhynchus in the family Ornithocheiridae. It is characterized by the shape and position of the sagittal crest on the upper and lower jaw, the arrangement and length of the teeth and the spoon-like lateral expansion of the anterior parts of the jaws. It closely resemblesColoborhynchus wadleighi from North America andColoborhynchus clavirostris from England. Diagnostic anatomical characteristics permit a revision of the genusTropeognathus, which is shown here to be a junior synonym of other described taxa.Tropeognathus mesembrinus is referred toCr…
Digital competence across boundaries - beyond a common Nordic model of the digitalisation of K-12 schools?
2021
This paper explores policy related to digital competence and the digitalisation of Nordic K-12 schools. Anchored in some key transnational policies on digital competence, it describes some current Nordic movements in the national policies of Denmark, Finland, Norway and Sweden. The concept of boundary objects is used as an analytical lens, for understanding digital competence as a plastic and temporal concept that can be used to discuss the multi-dimensional translation of this concept in these Nordic countries. The paper ends with a discussion of the potential to view digital competence as a unifying boundary object that, with its plasticity, temporality and n-dimensionality, can show sign…
Kolmasluokkalaisten käsityksiä ja kokemuksia sähköisestä pelillisestä oppimateriaalista
2018
Hottinen-Puukko, Heli. 2018. Kolmasluokkalaisten käsityksiä ja kokemuksia sähköisestä pelillisestä oppimateriaalista. Kasvatustieteen pro gradu -tutkielma. Jyväskylän yliopisto. Opettajankoulutuslaitos. Tutkielman tarkoituksena oli selvittää oppilaiden käsityksiä ja kokemuksia sähköisestä pelillisestä oppimateriaalista sekä pelillisyyden mahdollisesti mukanaan tuomasta lisämotivaatiosta oppimiseen. Tutkimukseen osallistui 14 kolmannen luokan oppilasta, joita havainnoitiin pelillisen oppimateriaalin käyttötilanteessa sekä haastateltiin. Oppilaat olivat kahdesta eri koulusta Keski- ja Etelä-Suomesta. Aineiston analysoinnissa käytettiin sisällönanalyysiä. Tulosten mukaan oppilaat kokivat oppiv…
Les nouvelles ségrégations scolaires et professionnelles : XVIIIes journées d'étude sur les données longitudinales dans l'analyse du marché du travai…
2011
Relief (échanges du CEREQ), n°34, mai 2011, enligne sur http://www.cereq.fr/index.php/content/download/1971/22647/file/relief34.pdf; Ségrégations scolaires et professionnelles sont les deux thèmes des 18èmes Journées d'études sur les données longitudinales dans l'analyse du marché du travail. Quatre types de ségrégations font l'objet des communications et structurent cet ouvrage : les ségrégations spatiales ou sociales, celles liées à la segmentation du marché du travail et les ségrégations de genre.
Intrahepatic myeloid-cell aggregates enable local proliferation of CD8+T cells and successful immunotherapy against chronic viral liver infection
2013
Chronic infection is difficult to overcome because of exhaustion or depletion of cytotoxic effector CD8(+) T cells (cytotoxic T lymphoytes (CTLs)). Here we report that signaling via Toll-like receptors (TLRs) induced intrahepatic aggregates of myeloid cells that enabled the population expansion of CTLs (iMATEs: 'intrahepatic myeloid-cell aggregates for T cell population expansion') without causing immunopathology. In the liver, CTL proliferation was restricted to iMATEs that were composed of inflammatory monocyte-derived CD11b(+) cells. Signaling via tumor-necrosis factor (TNF) caused iMATE formation that facilitated costimulation dependent on the receptor OX40 for expansion of the CTL popu…
Shared determinants between virus-infected and trinitrophenyl-conjugated H-2-identical target cells detected in cell-mediated lympholysis
1976
Infection of H-2-identical mice with either lymphocytic choriomeningitis (LCM) virus, vaccinia virus, or paramyxo (Sendai) virus resulted in the generation of specifically sensitized cytotoxic T lymphocytes (CTL). CTL generated in vitro against 2,4,6-trinitrophenyl (TNP)-conjugated syngeneic stimulator cells were specifically cytotoxic for TNP-conjugated H-2K (D) region identical targets. Both LCM and vaccinia-induced CTL, however, were found to be strongly cytotoxic towards TNP-conjugated, H-2K(D) region-identical target cells. In contrast, Sendai virus-induced CTL did not lyse TNP-conjugated, syngeneic target cells. Inhibition experiments using cold targets suggested that shared antigenic…