Search results for "verkkoteoria"
showing 10 items of 22 documents
The effect of fish life-history structures on the topologies of aquatic food webs
2021
Biological organisms can vastly change their ecological functionality due to changes in body size and diet across their life. Consequently, it has been increasingly recognized that to attain sufficient biological realism, food webs may need to include life-history structures. The objective of the work is to study theoretically whether and how the inclusion of life-history structures affects the food web topology. Topological research was done by applying network theory metrics for three different food web types with two different sizes that were generated by using the niche-model. The dynamical modeling was performed by using an allometric trophic network modeling approach. The different ty…
Editorial : Networks Applied in Science Education Research
2020
Science education research is, in many ways, involved with exploring relational aspects of diverse elements that affect students’ learning outcomes; at one end, the elements may be concepts to be learned, and at the other end, the relations between students in different types of learning settings and environments and, ultimately, how such elements may interact [...]
Transient seizure onset network for localization of epileptogenic zone: effective connectivity and graph theory-based analyses of ECoG data in tempor…
2018
Objective: Abnormal and dynamic epileptogenic networks cause difficulties for clinical epileptologists in the localization of the seizure onset zone (SOZ) and the epileptogenic zone (EZ) in preoperative assessments of patients with refractory epilepsy. The aim of this study is to investigate the characteristics of time-varying effective connectivity networks in various non-seizure and seizure periods, and to propose a quantitative approach for accurate localization of SOZ and EZ. Methods: We used electrocorticogram recordings in the temporal lobe and hippocampus from seven patients with temporal lobe epilepsy to characterize the effective connectivity dynamics at a high temporal resolution …
Network Entropy for the Sequence Analysis of Functional Connectivity Graphs of the Brain
2018
Dynamic representation of functional brain networks involved in the sequence analysis of functional connectivity graphs of the brain (FCGB) gains advances in uncovering evolved interaction mechanisms. However, most of the networks, even the event-related ones, are highly heterogeneous due to spurious interactions, which bring challenges to revealing the change patterns of interactive information in the complex dynamic process. In this paper, we propose a network entropy (NE) method to measure connectivity uncertainty of FCGB sequences to alleviate the spurious interaction problem in dynamic network analysis to realize associations with different events during a complex cognitive task. The p…
Surrogate outcomes and transportability
2019
Identification of causal effects is one of the most fundamental tasks of causal inference. We consider an identifiability problem where some experimental and observational data are available but neither data alone is sufficient for the identification of the causal effect of interest. Instead of the outcome of interest, surrogate outcomes are measured in the experiments. This problem is a generalization of identifiability using surrogate experiments and we label it as surrogate outcome identifiability. We show that the concept of transportability provides a sufficient criteria for determining surrogate outcome identifiability for a large class of queries.
Ojasta allikkoon : ympäristönsuojelukamppailun kuvaus toimijaverkkoteorian keinoin
2017
Tapaustutkimukseni tehtävänä on selvittää, kuinka toimijuudet muodostuvat ympäristönsuojelukamppailussa. Tutkimuksen keskiössä on toimijaverkkoteorian näkökulmasta tarkastella Hyvinkään Kurkisuon kohtalosta käytyä ympäristönsuojelukamppailua ja tutkia miten materiallisen toimijuus vaikuttaa tässä kokonaisuudessa. Toimijaverkoston hahmottelussa käytän apuvälineenä Kurkisuon ympäristövaikutusten arviointi -prosessin (YVA) analysoimista, jonka kautta hahmotan toimijat ja heidän välisiä sidoksiaan. Tutkimukseni aineiston runko tulee YVA-dokumenteista,lisäksi merkittävänä aineistolähteenä on eri tiedotusvälineiden aiheesta tekemät artikkelit, uutisoinnit ja www-julkaisut. Lisäksi yksittäinen tut…
Graph-based exploration and clustering analysis of semantic spaces
2019
Abstract The goal of this study is to demonstrate how network science and graph theory tools and concepts can be effectively used for exploring and comparing semantic spaces of word embeddings and lexical databases. Specifically, we construct semantic networks based on word2vec representation of words, which is “learnt” from large text corpora (Google news, Amazon reviews), and “human built” word networks derived from the well-known lexical databases: WordNet and Moby Thesaurus. We compare “global” (e.g., degrees, distances, clustering coefficients) and “local” (e.g., most central nodes and community-type dense clusters) characteristics of considered networks. Our observations suggest that …
Verkkojen piirtäminen Silverlightilla
2012
Silverlight-teknologialla voidaan tehdä mm. näyttäviä web- ja mobiilisovelluksia. Tutkielmassa selvitetään Silverlightin soveltuvuutta verkkojen piirto-ohjelman tekemiseen. Tutkielmassa ohjelmoitiin piirto-ohjelma, joka havainnollistaa ratsun polun etsintää shakkilaudalla. Ohjelman kehitysprosessin aikana huomattiin, että Silverlight soveltuu tutkielman mittaluokan verkoille. Silverlight-sovellus saattaa kuitenkin hidastua, jos sovellukseen tuodaan reaaliaikaisia tapahtumia vaativia tai pelimäisiä elementtejä. Tällöin voi olla järkevää vaihtaa XNA-kehitykseen Windows-ympäristössä.
Aging well in the community: Understanding the complexities of older people's dial-a-ride bus journeys
2021
Older peoples' independent living in their own homes and their ability to move around and maintain social relations in their communities have been acknowledged as important aims to support their well-being. In this article, we study Special Transport Services as a means to support older persons with ‘aging in place’ – that is, within their communities. From “go-alongs” (shared dial-a-ride bus journeys) and “sit-down interviews” (at participant's home or a café) with 12 older people living in a Finnish suburb, we explored their everyday dial-a-ride bus trips to the local mall. We used actor-network theory and the concept of motility to show how at first glance what appeared to be simple dial…
Understanding the Strategies and Practices of Facebook Microcelebrities for Engaging in Sociopolitical Discourses
2022
In this paper, we study popular microcelebrities from the Global South to understand their strategies and practices on Facebook. Unlike traditional celebrities who gain their reputation through different types of physical performance, these microcelebrities attain their status by presenting themselves in a favorable way to their online followers. We conducted interviews with 19 microcelebrities from Bangladesh and analyzed our data using actor-network theory (ANT) and Goffman’s dramaturgical analysis (DA) of human interaction. We discuss the complex socio-technical ecosystem of the microcelebrity and the roles of non-human actors, such as platforms and local internet infrastructure along wi…