Search results for "EFE"
showing 10 items of 5785 documents
Meemit ja viraalimarkkinointi : viraaliefektin saavuttaminen sosiaalisessa mediassa
2016
Termin meemi alkuperä on Richard Dawkinsin alkuperäisessä teoksessa The Selfish Gene (1976), jossa meemit määriteltiin kulttuurillisena vastineena geeneille. Yli kolmekymmentä vuotta myöhemmin, termi on nyt Internetin takia ajankohtaisempi kuin koskaan. Meemejä ja memetiikkaa on hyödynnetty myös markkinointiin, ja aihepiiri on varsinkin viraalimarkkinoinnin kannalta olennainen, sillä meemien tutkiminen ja memetiikan teorioiden hyödyntäminen voi helpottaa viraalimarkkinoinnin ilmiöiden ymmärtämisessä. Viraalimarkkinoinnissa tavoiteltava ‘viraaliefekti’ tarkoittaa viruksen kaltaista leviämistä, mikä on selkeässä yhteydessä meemien leviämiseen. Syitä menestyneiden Internet-meemien leviämiseen …
Virtuālās draudzības un pašefektivitātes novērtējuma saistība ar problemātisku interneta lietošanu pusaudžiem
2019
Darba mērķis bija izpētīt, kādas saistības pastāv starp virtuālo draudzību, pašefektivitāti, problemātisku interneta lietošanu un demogrāfiskās aptaujas rādītājiem pusaudžiem, kā arī atsevišķi zēniem un meitenēm; un kā šie mainīgie prognozē virtuālo draudzību. Pētījumā piedalījās 288 pusaudži vecumā no 11 līdz 18 gadiem (M = 13,96), no tiem 139 zēni (M = 14,22) un 149 meitenes (M = 13,72). Pētījumā tika izmantotas aptaujas, kas adaptētas šī darba ietvaros: 1. Problemātiskas interneta lietošanas skala pusaudžiem, 2. Virtuālās draudzības skala, 3. Pašefektivitātes skala bērniem. Pētījuma rezultātā tika konstatētas statistiski nozīmīgas korelācijas starp virtuālo draudzību, problemātisku inter…
Characterization of the autoantigen La (SS-B) as a dsRNA unwinding enzyme
1997
During the analysis of the La (SS-B) autoantigen for catalytic activities an ATP-dependent double-stranded RNA unwinding activity was detected. Both native and recombinant La proteins from different species displayed this activity, which could be inhibited by monospecific anti-La antibodies. La protein was able to melt dsRNA substrates with either two 3'-overhangs or a single 3'- and a 5'-overhang. Double-stranded RNAs with two 5'-overhangs were not unwound, indicating that at least one 3'-overhang is required for unwinding. Sequence elements of the La protein that might be involved in dsRNA unwinding, such as an evolutionarily conserved putative ATP-binding motif and an element that is hom…
Endophytic Fungi in Asymptomatic Vitis vinifera L. and their Effects on Plasmopara viticola
2016
During a multi-year study on the life cycle of Plasmopara viticola to assess the typical epidemiology of downy mildew on grapevine (Vitis vinifera) in west Sicily (Italy), several leaves on which the downy mildew had collapsed were found and observed in a vineyard located in Marsala, in Trapani Province. An antagonistic fungus was isolated from these leaves and named A20; through its morphology, it was identified as a hyphomycete belonging to the genus Acremonium. The antagonism of A20 against the asexual and sexual spores of P. viticola, as well as endophytic nature of the genus Acremonium in V. vinifera were confirmed by further studies which have been carried out over the past decade. In…
Procedures for study of teaching practices. Literature Review
2012
Interest in studying teaching practices has increased, because of the need to evaluate teachers and dissatisfaction with the usual ways of doing it. Recent approaches with Value-Added Models, based on students’ results on achievement tests do not seem satisfactory. The article is based on a review of literature and classifies the approaches to practices in three groups: instruments based on information given by teachers; observation protocols; and approaches based on the analysis of products of the practices. Specific tools are described and advantages and disadvantages of the three approaches are discussed. El interés por las prácticas docentes ha aumentado, en parte por la necesidad de ev…
Decoupled control scheme of grid-connected split-source inverters
2017
Grid-connected power conversion systems for renewable energy sources must fulfill several requirements, e.g., the high efficiency, the reduced cost and complexity, and, quite often, the boost capabilities that is usually achieved using a front-end dc–dc boost converter before the inversion stage, leading to a two-stage architecture. Meanwhile, single-stage power conversion systems, which perform the boosting operation within the inversion one, offer some potential advantages, in terms of reducing the complexity and the volume of the whole system. Among several proposed options, the split-source inverter (SSI) has been recently proposed by Abdelhakim et al. as an alternative option with some…
We Shape Our Tools, and Thereafter Our Tools Shape Us
2017
The current and incoming editors in chief present the articles of this current issue of Human Technology. Additionally, they discuss the human component of recent technological macrotrends and the journal’s editorial interests in responding to and exploring them. During Editor in Chief Pertti Hurme’s 3-year term, research reflecting a wide range of topics has been published in Human Technology. This online journal, proudly open-access since its beginning, and will continue to invite innovative and interesting manuscripts for open-access publishing under its new editor in chief, Jukka Jouhki.
Complex plant quality—microbiota–population interactions modulate the response of a specialist herbivore to the defence of its host plant
2022
Many specialist herbivores have evolved strategies to cope with plant defences, with gut microbiota potentially participating to such adaptations. In this study, we assessed whether the history of plant use (population origin) and microbiota may interact with plant defence adaptation. We tested whether microbiota enhance the performance of Melitaea cinxia larvae on their host plant, Plantago lanceolata and increase their ability to cope the defensive compounds, iridoid glycosides (IGs). The gut microbiota were significantly affected by both larval population origin and host plant IG level. Contrary to our prediction, impoverishing the microbiota with antibiotic treatment did not reduce larv…
Estudio de los defectos congénitos del arco anterior, arco posterior y foramen transversarium de C1
2015
La primera vértebra cervical (atlas) se caracteriza por presentar rasgos anatómicos diferentes al resto de las vértebras cervicales, no tiene cuerpo ni apófisis espinosa, sino que muestra una morfología anular, con dos arcos (anterior y posterior) y dos masas laterales. Las alteraciones congénitas del arco posterior del atlas son poco frecuentes, habiéndose publicado frecuencias entre 0,73% y 4%, casi siempre asintomáticas, por lo que se diagnostican incidentalmente. Sin embargo, también se ha descrito una amplia variedad de sintomatología asociada, relacionada o no con antecedentes traumáticos, desde cervicalgia crónica, cefalea, signo de Lhermitte secundario a estenosis cervical sobre tod…
Multifactorial Assessment of Risk of Falling in 753 Post-Menopausal Women: A Multicenter Cross-Sectional Study by the Italian Group for the Study of …
2020
Giovanni Iolascon,1 Alessandro de Sire,1– 3 Dario Calafiore,1,4 Maria Grazia Benedetti,5 Carlo Cisari,2,6 Giulia Letizia Mauro,7 Silvia Migliaccio,8 Ranuccio Nuti,9 Giuseppina Resmini,10 Stefano Gonnelli,9 Antimo Moretti1 1Department of Medical and Surgical Specialties and Dentistry, University of Campania “Luigi Vanvitelli”, Naples, Italy; 2Physical and Rehabilitative Medicine, Department of Health Sciences, University of Eastern Piedmont “A. Avogadro”, Novara, Italy; 3Rehabilitation Unit, “Mons L. Novarese” Hospital, Vercelli, Moncrivello, Italy; 4Section of Neuromotor Rehabilitation, Department of Neuroscience, ASST Ca…