Search results for "STING"
showing 10 items of 3756 documents
Spatial source phase : A new feature for identifying spatial differences based on complex-valued resting-state fMRI data
2019
Spatial source phase, the phase information of spatial maps extracted from functional magnetic resonance imaging (fMRI) data by data‐driven methods such as independent component analysis (ICA), has rarely been studied. While the observed phase has been shown to convey unique brain information, the role of spatial source phase in representing the intrinsic activity of the brain is yet not clear. This study explores the spatial source phase for identifying spatial differences between patients with schizophrenia (SZs) and healthy controls (HCs) using complex‐valued resting‐state fMRI data from 82 individuals. ICA is first applied to preprocess fMRI data, and post‐ICA phase de‐ambiguity and den…
The Ka’ulayawaa festivals among the Wayùu. Exploring continuities and variations in forms, meanings and contexts through ethnographic sources
2022
In this paper I review and compare the main sources of information about the ka’ulayawaa festivals among the Wayùu, an Amerindian people inhabiting in the semiarid Guajira peninsula (Northern Colombia and Venezuela). For their peculiar mix of songs, dances, imitative plays and competitive games, inserted into a same festive framework, these festivals are particularly interesting to be studied as expressive metacommentaries (in the sense of Turner) of Wayùu social structures, cultural values and worldview. Nevertheless, they have not so far been the subject of a specific anthropological analysis, also because they ceased to be celebrated around the middle of the twentieth century, that is, b…
Evolution des paysages Sahélines au cours des six dernières décennies dans la région de Niamey : de la disparition de la brousse tigrée à l'encroutem…
2010
In the Sahel, the rapid increase of the population during the last decades and the climate variation lead to an important environmental degradation. This work aims to measure the impacts of the human pressure on ecosystem during the six last decades. A diachronic cartography of a 100 km² area close to Niamey was done with aerial photographs (1950 and 1975) and GPS measurements (2009). Results showed that the tiger bush vegetation was completely cleared between 1950 and 2009 while the fallow decreases from 7 % to 1 %. In the sandy valley, the increase of cultivated fields from 20,7 % (1950) to 69,4 % (1975) favoured wind and water erosions which allowed surface soil crusting. Between 1975 an…
Latvijas integrācijas politika - divu koncepciju ietekmes izvērtējums
2018
Bakalaura darba tēma: Latvijas integrācijas politika - divu koncepciju ietekmes izvērtējums Bakalaura darba autors: Bk.sc.pol. Igors Muravjovs Kursa darba vadītājs: asociētais prof. Dr.sc.pol. Ivars Ijabs Bakalaura darbs tika izstrādāts ar mērķi konstatēt stingrās un iekļaujošās sabiedrības integrācijas pieejas ietekmi uz Latvijas sabiedrības integrācijas politiku. Autors izvirzīja sekojošo pētījuma problēmu: informācijas trūkums par Latvijas integrācijas politiku ietekmējošajiem faktoriem.. Kā arī tika izvirzīti divi pētījuma jautājumi: 1. cik liela ir stingrās un iekļaujošās integrācijas pieejas ietekme uz Latvijas sabiedrības integrācijas politiku?; 2. kādai no sabiedrības integrācijas p…
Invasive Northern red oaks benefit temnothorax crassispinus (Hymenoptera: Formicidae) ant colonies
2018
Non-native plant species can modify their environment, and their influence on food chains is well recognized. How ever, the phenomenon of non-nutrient dependent interaction between non-native plants and native animals has received little attention to date. The Northern Red Oak (Quercus rubra) is a non-native, invasive tree species in Europe, which strongly negatively influences co-occurring plants. However, a part of the native fauna is able to utilize the resources offered by this species in its non-native range. We studied a common species of wood ant, Temnothorax crassispinus, in forests under canopies of non-native Northern Red Oak and native oaks, Pedunculate Oak (Q. robur), and Sessil…
Corrigendum: ExGUtils: A Python Package for Statistical Analysis With the ex-Gaussian Probability Density
2018
Two‐sample problems in statistical data modelling
2010
A common problem in mathematical statistics is to check whether two samples differ from each other. From modelling point of view it is possible to make a statistical test for the equality of two means or alternatively two distribution functions. The second approach allows to represent the two‐sample test graphically. This can be done by adding simultaneous confidence bands to the probability‐probability (P — P) or quantile‐quantile (Q — Q) plots. In this paper we compare empirically the accuracy of the classical two‐sample t‐test, empirical likelihood method and several bootstrap methods. For a real data example both Q — Q and P — P plots with simultaneous confidence bands have been plotted…
Fibre fragment distribution in a single-fibre composite tension test
2001
Abstract Single fibre fragmentation tests are performed for brittle fibres with Weibull strength distribution and different surface treatments. The fragmentation process is modelled and closed-form expressions for break spacing distribution are obtained. The model accounts for the effect of finite fibre length on the initial fragmentation as well as for break interaction on the advanced fragmentation stage. It is assumed that the exclusion zone due to fibre–matrix interface failure and stress recovery in the fibre is linearly dependent on the applied load. This assumption is validated experimentally. The derived theoretical average fragment length dependence on applied load is used to deter…
Analysis of a database to predict the result of allergy testing in vivo in patients with chronic nasal symptoms.
2014
Background This article uses the logistic regression model for diagnostic decision making in patients with chronic nasal symptoms. We studied the ability of the logistic regression model, obtained by the evaluation of a database, to detect patients with positive allergy skin-prick test (SPT) and patients with negative SPT. The model developed was validated using the data set obtained from another medical institution. Methods The analysis was performed using a database obtained from a questionnaire administered to the patients with nasal symptoms containing personal data, clinical data, and results of allergy testing (SPT). All variables found to be significantly different between patients w…
Aristóteles entre doxografía y biografía: sobre Diógenes Laercio V 31
2019
Se pretende llamar la atención sobre un par de frases que aparecen justo hacia la mitad de la controvertida doxografía de Aristóteles que se puede leer en las Vidas y doctrinas de los filósofos más ilustres de Diógenes Laercio V 31, y que desde luego no corresponden a ningún sistema doxográfico conocido. Como sucede no pocas veces en la obra laerciana, la misma apreciación sobre si el filósofo debe o no enamorarse y contraer matrimonio se repite idéntica en otras doxografías completamente distintas: la cirenaica (DL II 91), la estoica (DL VII 129) y la epicúrea (DL X 118). Cabe plantearse, pues, el origen de este interés, en varias doxografías, por la vida sentimental, podríamos decir, de l…