Search results for "MeaNS"
showing 10 items of 124 documents
Modified total variation regularization using fuzzy complement for image denoising
2015
In this paper, we propose a denoising algorithm based on the Total Variation (TV) model. Specifically, we associate to the regularization term of the Rodin-Osher-Fatimi (ROF) functional a small weight whenever denoising is performed in edge and texture regions, which means less regularization and more details preservation. On the other hand, a large weight is associated if the region being filtered is smooth which means noise will be well suppressed. The weight computation is inspired from the fuzzy edge complement. Experiments on well-known images and comparison with state of the art denoising algorithms demonstrate that the proposed method not only presents good denoising performance but …
Pattern Classification from Multi-beam Acoustic Data Acquired in Kongsfjorden
2021
Climate change is causing a structural change in Arctic ecosystems, decreasing the effectiveness that the polar regions have in cooling water masses, with inevitable repercussions on the climate and with an impact on marine biodiversity. The Svalbard islands under study are an area greatly influenced by Atlantic waters. This area is undergoing changes that are modifying the composition and distribution of the species present. The aim of this work is to provide a method for the classification of acoustic patterns acquired in the Kongsfjorden, Svalbard, Arctic Circle using multibeam technology. Therefore the general objective is the implementation of a methodology useful for identifying the a…
Social capital formation across space: proximity and trust in European regions
2013
An extensive economics and regional science literature has discussed the importance of social capital for economic growth and development. Yet, what social capital is and how it is formed are elusive issues, which require further investigation. Here, we refer to social capital in terms of “civic” capital and “good culture,” as rephrased by Guiso, Sapienza, and Zingales and Tabellini. The accumulation of this kind of capital allows the emerging of regional informal institutions, which may help explaining differences in regional development. In this article, we take a regional perspective and use exploratory space and space–time methods to assess whether geography, via proximity, contributes…
Exploring the differences of Finnish students in PISA 2003 and 2012 using educational data mining
2016
Suomi on aina saanut hyviä tuloksia PISA-tutkimuksissa, mutta vuonna 2012 tulokset huononivat merkittävästi. Vuosien 2003 ja 2012 aineistoihin sovellettiin muokattua tiedonlouhinta-algoritmia nimeltään k-means++. Tuloksena saatiin kummallekin aineistolle viisi klusteria, joita vertailtiin keskenään. Huonommin pärjänneet klusterit olivat pysyneet samankaltaisina, mutta paremmin pärjänneiden klusteri oli jakautunut. Lisäksi keskiverrosti pärjänneiden klusteri oli kasvanut huomattavasti. Kaikkien klustereiden tulokset matematiikassa olivat laskeneet vuodesta 2003. Finland has always gotten good scores in PISA studies, but in 2012 the results dropped significantly. A modified version of a data mi…
Komunikatīvais mērķtiecīgums lietišķajās prezentācijās
2018
Bakalaura darbā tiek pētīta saistība starp verbāliem un neverbāliem līdzekļiem, lai panāktu komunikatīvu mērķtiecīgumu lietišķajās prezentācijās. Darba mērķis ir analizēt un salīdzināt verbālo un neverbālo līdzekļu lietojumu un savienojumu lietišķajās prezentācijās, ko veic trīs profesionāli runātāji. Pētījuma mērķa sasniegšanai ir izvēlēts literatūras apskats un gadījumu izpēte ka pētījuma metodes. Galvenie secinājumi ir, ka efektīvi verbālie līdzekļi (stilistiskās izteiksmes līdzekļi, intensīva valoda, leksikas daudzveidība) un neverbālie līdzekļi (stāja, žesti, smaids, apģērbs, balss un pauzes) ir svarīgi lietišķajās prezentācijās, lai sasniegtu komunikatīvo mērķtiecīgumu. Tomēr ir jātur…
Radio frequency fingerprinting for outdoor user equipment localization
2017
The recent advancements in cellular mobile technology and smart phone usage have opened opportunities for researchers and commercial companies to develop ubiquitous low cost localization systems. Radio frequency (RF) fingerprinting is a popular positioning technique which uses radio signal strength (RSS) values from already existing infrastructures to provide satisfactory user positioning accuracy in indoor and densely built outdoor urban areas where Global Navigation Satellite System (GNSS) signal is poor and hard to reach. However a major requirement for the RF fingerprinting to maintain good localization accuracy is the collection and updating of large training database. The Minimization…
CLUSTERING INCOMPLETE SPECTRAL DATA WITH ROBUST METHODS
2018
Abstract. Missing value imputation is a common approach for preprocessing incomplete data sets. In case of data clustering, imputation methods may cause unexpected bias because they may change the underlying structure of the data. In order to avoid prior imputation of missing values the computational operations must be projected on the available data values. In this paper, we apply a robust nan-K-spatmed algorithm to the clustering problem on hyperspectral image data. Robust statistics, such as multivariate medians, are more insensitive to outliers than classical statistics relying on the Gaussian assumptions. They are, however, computationally more intractable due to the lack of closed-for…
Spatiotemporal hotspots analysis for exploring the evolution of diseases: An application to oto-laryngopharyngeal diseases
2013
Abstract View references (14) This paper presents a spatiotemporal analysis of hotspot areas based on the Extended Fuzzy C-Means method implemented in a geographic information system. This method has been adapted for detecting spatial areas with high concentrations of events and tested to study their temporal evolution. The data consist of georeferenced patterns corresponding to the residence of patients in the district of Naples (Italy) to whom a surgical intervention to the oto-laryngopharyngeal apparatus was carried out between the years 2008 and 2012
Żydzi w dyskursie Kościoła katolickiego
2016
Jews in the discourse of the Catholic Church The article describes the most important changes which appeared after the Second Vatican Council in the discourse of the Catholic Church in reference to its attitude to confessors of Judaism. The change is the difference between the state of texts in two different moments, which is why the first part of the article is dedicated to the characteristics of pre-Council (and mostly pre-war) discourse about Jews, and the second part to main directions of the changes caused by the realization of the Council postulates. The third part shows indications of the continuation of old, deep-rooted schemes. The analysis partly concerns texts of the Church world…
Sequestrati dalla vendetta: “rimanere chiusi fuori dall’oggetto”
2013
RiassuntoA partire dal loro lavoro di psicoterapeute e attraverso alcuni frammenti clinici che si riferiscono ad un gruppo di adolescenti svoltosi in un quartiere a rischio di Palermo, le Autrici analizzano la dimensione mafiosa non restringendola al solo comportamento criminale; piuttosto declinandola lungo alcuni significanti: non identità e gruppo mafioso che colonizza e sottomette lo psichismo del singolo; fantasmi familiari potenti e spietati che impediscono il costituirsi di sé originali e autonomi; personalità impastate di indifferenza emotiva e vendicatività. Significanti che rendono conto delle vaste aree di desertificazione e pietrificazione – resistenza al cambiamento – avvertita…