Search results for "Stream"
showing 10 items of 682 documents
Mean-Field Game Modeling the Bandwagon Effect with Activation Costs
2015
This paper provides a mean-field game theoretic model of the bandwagon effect in social networks. This effect can be observed whenever individuals tend to align their own opinions to a mainstream opinion. The contribution is threefold. First, we describe the opinion propagation as a mean-field game with local interactions. Second, we establish mean-field equilibrium strategies in the case where the mainstream opinion is constant. Such strategies are shown to have a threshold structure. Third, we extend the use of threshold strategies to the case of time-varying mainstream opinion and study the evolution of the macroscopic system.
To make innovations such as replication mainstream, publish them in mainstream journals.
2019
AbstractIt was a pleasure to read Zwaan et al.'s wise and balanced target article. Here, I use it as a shining example for bolstering the argument that to make innovations such as replication mainstream, it seems advisable to move the debates from social media to respected “mainstream” psychology journals. Only then will mainstream psychologists be reached and, we hope, convinced.
Political Parties Transition into the Digital Era
2021
This chapter outlines the main dimensions of analysis for assessing how mainstream and new parties are building their digital platforms and transitioning from traditional (offline) organisations into the digital world. So far, most of the academic attention has been focused on the impact of the use of digital technologies on party competition and campaigning, while the intra-organisational dimensions have been significantly under-researched. However, several parties in Europe and around the world, both traditional and digital native, have increasingly used digital technologies such as online platforms for internal decision-making, funding, communication and membership mobilisation. We provi…
Media and Information in Times of Crisis: The Case of the COVID-19 Infodemic
2021
Media play an important role in informing the public about issues on the political agenda, different opinions, and public statements, thereby establishing and bringing forth new spaces of information flow. One of the media’s main roles in democratic societies is to give publicity to central issues on the political and public agenda, especially in times of crisis. Nevertheless, studies have found that, in times of crisis, the public and the media tend to “rally ’round the flag,” leading to significant decreases in their criticality, alongside (almost) unreserved support for nation(al) or region(al) leaders. This paper aims to bridge the gap between both media and communication studies and ge…
The Digitalisation of Political Parties in Comparative Perspective
2021
This chapter outlines the main findings of the edited book. Through the study of a wide range of political parties from Europe and beyond, this book has explored the different degrees of digitalisation that political parties present, and, at the same time, discussed the main technological, democratic issues and trade-offs that political parties have faced in their digital transition. The most relevant finding is that all political parties operating in the democracies analysed have digitalised their organisations to some extent. Our main finding across several cases shows that the digitalisation of parties does not entail a homogenous process of convergence towards a new mode of managing par…
Significance and Current Status of Wastewater Reuse in Sicily
1991
In Sicily wastewater is being regarded as a supplemental source of water, especially for agricultural use, which represents the greatest demand at present and in the future. That is because water demand is already approaching total usable resources, and severe shortage is experienced almost everywhere and in every sector. To help overcome possible implementation problems due to high salinity and pollutant concentrations, lack in monitoring capabilities, and emotional public perception of possible health risks, major field research programs have been undertaken, including an experimental station with a pilot plant and a series of field plots.
Salt accumulation and effects within foliage of Tilia × vulgaris trees from the street greenery of Riga, Latvia
2020
International audience; Green infrastructures within sprawling cities provide essential ecosystem services, increasingly undermined by environmental stress. The main objective in this study was to relate the allocation patterns of NaCl contaminants to injury within foliage of lime trees mechanistically and distinguish between the effects of salt and other environmental stressors. Using field material representative of salt contamination levels in the street greenery of Riga, Latvia, the contribution of salt contaminants to structural and ultrastructural injury was analyzed, combining different microscopy techniques. On severely salt-polluted and dystrophic soils, the foliage of street lime …
Characteristics of current roadside pollution using test-monitoring plots
2014
Abstract The aim of the study was the qualitative recognition of the existing roadside pollutants deposited in topsoils located close to roads with high traffic volume. So far, the studies have helped to determine the content of pollutants that accumulated over a long period of time. Traditionally, it has been difficult to distinguish between roadside pollution and pollution from other industrial sources. In order to avoid such problems and to accurately recognize present threats originating from road traffic, test-monitoring plots were installed in Poland (Gliwice and Opole), Germany (Tubingen, Ulm and Boblingen), Finland (Helsinki), Tajikistan (Dushanbe) and China (Lanzhou). To install th…
Modeling recurrent distributions in streams using possible worlds
2015
Discovering changes in the data distribution of streams and discovering recurrent data distributions are challenging problems in data mining and machine learning. Both have received a lot of attention in the context of classification. With the ever increasing growth of data, however, there is a high demand of compact and universal representations of data streams that enable the user to analyze current as well as historic data without having access to the raw data. To make a first step towards this direction, we propose a condensed representation that captures the various — possibly recurrent — data distributions of the stream by extending the notion of possible worlds. The representation en…
The search for reference conditions for stream vegetation in northern Europe
2008
Summary 1. The European Water Framework Directive provides a framework for improving the ecological quality of stream ecosystems, with deviation from reference used as a measure of ecological status. 2. Here we examine the possibility of using less impacted stream sites from Latvia, Lithuania and Poland to establish a Danish reference network for macrophyte assemblages, and as a guiding image for identification of possible references sites within Denmark. Both approaches were evaluated using historical Danish records. 3. Four different macrophyte assemblages were identified for mid-sized streams in the Central and Eastern Lowland ecoregions. Macrophyte assemblages could not be delineated us…