Search results for " top-down"

Response of seagrasses and marine biofilms to natural acidification at CO2 vents

Nel corso degli ultimi 200 anni, circa il 30% delle emissioni antropogeniche di CO2 nell’atmosfera sono state assorbite dagli oceani, provocando un abbassamento medio dei livelli di pH oceanici pari a circa 0.1 unità. Questo fenomeno, noto come acidificazione degli oceani, sta determinando conseguenze negative sugli ecosistemi marini e sul loro funzionamento. Le attuali proiezioni climatiche suggeriscono che, in futuro, i cambiamenti climatici continueranno e si intensificheranno se non verranno adottate efficaci misure di mitigazione. Riuscire a valutare la risposta degli ecosistemi marini ai cambiamenti climatici costituisce una vera sfida per la ricerca scientifica, non solo per la diffi…

Can bureaucrats order public health? The case of Norway

2013

Introduction: The implementation of a new structural reform, the Coordination Reform, prioritizing a new public health agenda, was initiated to develop a more decentralized, integrated health care system in Norway in 2012. The same year, new health legislation was implemented and due to the new Public Health Act the responsibility for implementing a new public health agenda was decentralized to the local level. Historically, due to lack of funding – these issues have got low priority among local authorities. The new public health legislation reflects a shift in policy focus from treatment to illness prevention – where planning and partnership among primary end specialist health care, as wel…

Interferenza tra il livello dell’oggetto e attributi di base in stimuli visivi: studio su pazienti con lesione cerebrale.

2011

Introduzione. In compiti di ricerca visiva i processi top-down coinvolti nel riconoscimento della forma dell’oggetto possono interferire nella elaborazione bottom-up degli attributi elementari che compongono l’oggetto. La performance in tali compiti può essere facilitata dopo inibizione selettiva della corteccia parietale destra tramite r-TMS. In questo studio abbiamo indagato il ruolo di lesioni cerebrali nei compiti di ricerca visiva per singole caratteristiche caratterizzati da interferenza tra il livello dell’oggetto e degli attributi elementari. Pazienti con lesione focale del lobo parietale potrebbero paradossalmente non risentire dell’effetto interferente esercitato dal riconosciment…

Early Brain Sensitivity to Word Frequency and Lexicality During Reading Aloud and Implicit Reading

2019

The present study investigated the influence of lexical word properties on the early stages of visual word processing (<250 ms) and how the dynamics of lexical access interact with task-driven top-down processes. We compared the brain's electrical response (event-related potentials, ERPs) of 39 proficient adult readers for the effects of word frequency and word lexicality during an explicit reading task versus a visual immediate-repetition detection task where no linguistic intention is required. In general, we observed that left-lateralized processes linked to perceptual expertise for reading are task independent. Moreover, there was no hint of a word frequency effect in early ERPs, while …

Właściwości negocjacji w Unii Europejskiej: wybrane aspekty teoretyczne

2015

Artykuł koncentruje się na wybranych, najbardziej znaczących, aspektach teoretycznych właściwości negocjacji w Unii Europejskiej. Wśród nich znajdują się właściwości dotyczące: dużej liczby i różnorodności aktorów negocjacji; specyficznego przedmiotu negocjacji skutkującego wielopoziomowością i wieloaspektowością negocjacji w UE; wieloetapowością procesu negocjacji w UE, który angażuje różnorodnych aktorów na różnych poziomach i w zależności od tych płaszczyzn wymaga odmiennych aktywności negocjacyjnych i wreszcie procesów top-down i bottom-up jako determinant negocjacji w Unii Europejskiej. The focus of the paper is the selected, most significant theoretical aspects of negotiations conduct…

The Lean Urban Policies’ Design A values-centered method for sustainable urban planning.

In these past years, the necessity and urgency has emerged for policies tied to an alternate development to be efficiently applied, and not limited to single operations. The policies must be defined by a clear and effective method of action.
 Starting by investigating what are the relationship among human being, built environment and natural sources, in fact, we think it is possible to enrich the sustainable urban planning policies with new contents and possibly, new tools. By describing the frame, the objective is to define the most effective method, to be able to convey an effective project action and governance for the territory, to achieve predefined social and energy based objectives. …

Integracja w dezintegracji i dezintegracja w integracji: determinanty mechanizmów integracyjnych w Unii Europejskiej

2017

W dyskusji o przyszłości UE strategicznym wątkiem stała się kwestia integracji zróżnicowanej, której różne warianty zaczęły jawić się jako modus operandi Unii Europejskiej, co stało się przedmiotem kontrowersji między państwami członkowskimi. Co istotne, debacie poświęconej integracji zróżnicowanej zaczęły towarzyszyć rozważania na temat dezintegracji. W niniejszym artykule podjęta została próba zdefiniowania dezintegracji przy założeniu, że powinna być ona definiowana poprzez integrację, a także iż tak zaprojektowany proces definiowania nie może ograniczać się do wnioskowania o jednotorowej przeciwstawności dezintegracji względem integracji i vice versa. Wynika to z przekonania, że Unia Eu…

Ocean acidification as a driver of community simplification via the collapse of higher-order and rise of lower-order consumers

2017

AbstractIncreasing oceanic uptake of CO2 is predicted to drive ecological change as both a resource (i.e. CO2 enrichment on primary producers) and stressor (i.e. lower pH on consumers). We use the natural ecological complexity of a CO2 vent (i.e. a seagrass system) to assess the potential validity of conceptual models developed from laboratory and mesocosm research. Our observations suggest that the stressor-effect of CO2 enrichment combined with its resource-effect drives simplified food web structure of lower trophic diversity and shorter length. The transfer of CO2 enrichment from plants to herbivores through consumption (apparent resource-effect) was not compensated by predation, becaus…