Search results for " RED"
showing 10 items of 2272 documents
Asymptotic and bootstrap tests for subspace dimension
2022
Most linear dimension reduction methods proposed in the literature can be formulated using an appropriate pair of scatter matrices, see e.g. Ye and Weiss (2003), Tyler et al. (2009), Bura and Yang (2011), Liski et al. (2014) and Luo and Li (2016). The eigen-decomposition of one scatter matrix with respect to another is then often used to determine the dimension of the signal subspace and to separate signal and noise parts of the data. Three popular dimension reduction methods, namely principal component analysis (PCA), fourth order blind identification (FOBI) and sliced inverse regression (SIR) are considered in detail and the first two moments of subsets of the eigenvalues are used to test…
Dimensionality Reduction via Regression in Hyperspectral Imagery
2015
This paper introduces a new unsupervised method for dimensionality reduction via regression (DRR). The algorithm belongs to the family of invertible transforms that generalize Principal Component Analysis (PCA) by using curvilinear instead of linear features. DRR identifies the nonlinear features through multivariate regression to ensure the reduction in redundancy between he PCA coefficients, the reduction of the variance of the scores, and the reduction in the reconstruction error. More importantly, unlike other nonlinear dimensionality reduction methods, the invertibility, volume-preservation, and straightforward out-of-sample extension, makes DRR interpretable and easy to apply. The pro…
Participación de las farmacias comunitarias en los programas de reducción de daños
2008
Las farmacias, por su accesibilidad y distribución geográfica, constituyen un recurso muy adecuado para prevención y tratamiento de drogodependencias. Los farmacéuticos pueden participar en programas de reducción de daños y facilitar la incorporación de los Usuarios de Drogas Intravenosas (UDI) al sistema sanitario.Para muchos farmacéuticos el kit antisida, que comenzó a distribuirse en 1989 en las farmacias del País Vasco y se ha extendido a otras comunidades autónomas y países próximos, fue el primer paso en su implicación en este campo y les permitió concienciarse de su papel en el mismo.Los Programas de Intercambio de Jeringuillas son efectivos para prevenir conductas de riesgo y dismin…
Iedzimtu krāsu redzes deficītu izvērtēšana ar Farnsworth D15 testu
2020
Bakalaura darbs ir uzrakstīts latviešu valodā uz 35 lapām. Tas satur 22 attēlus, 2 tabulas un 32 literatūras avotu atsauces. Darba mērķis ir novērtēt kā L un M fotoreceptoru absorbcijas maksimumu pozīciju vērtības ietekmē krāsu kauliņu sakārtošanas secību C, S un leņķa vērtības krāsu redzes deficītu gadījumos, izmantojot Farnsworth D15 testa matemātisko krāsu uztveres modeli. Darba ietvaros modelētas krāsu kauliņu sakārtošanas secības sniedza iespēju noskaidrot kā D15 testa kauliņi ierosina tīklenes fotoreceptorus cilvēkiem ar krāsu redzes deficītu. Modeļa datu analīzei tika izmantota Vingrys & King-Smith metode. Izmantojot iegūtos datus tika noteiktas vidējas vērtības deitan un protan grup…
Physicochemical and technological properties of beef burger as influenced by the addition of pea fibre
2019
This study aimed to evaluate the physicochemical characteristics and sensory attributes of beef burgers with the addition of pea fibre as a partial substitute of meat or fat. Three formulations were prepared: control (CON) – similar to the commercial formulation; fibre/less meat (FLM)—5% meat reduction and addition of 1% pea fibre; fibre/less fat (FLF)—7% fat reduction and addition of 1% pea fibre. Non‐significant differences were obtained for pH, colour parameters (L* and b*), texture profile, cooking loss and size reduction among formulations. Moreover, sensory analysis with consumers of beef burgers did not indicate differences among the formulations for all the analysed attributes. Ther…
Effect of simvastatin on desaturase activities in liver from lean and obese zucker rats
1993
The effect of simvastatin, a hypocholesterolemic drug, on the biosynthesis of arachidonic acid was studied in obese and lean Zucker rats. After administration of 2 mg/kg body weight/d for 13 d, delta 6 and delta 5 desaturase activities were measured in liver microsomes at two substrate concentrations. In untreated rats, the delta 6 desaturation rate was similar in the obese and lean rats when measured at saturating substrate levels, whereas delta 5 desaturation was lower in the obese animals. Treatment with simvastatin did not change delta 6 desaturation in either phenotype but increased delta 5 desaturation in obese rats to reach the unchanged rate observed in lean animals. The changes wer…
Combining feature extraction and expansion to improve classification based similarity learning
2017
Abstract Metric learning has been shown to outperform standard classification based similarity learning in a number of different contexts. In this paper, we show that the performance of classification similarity learning strongly depends on the data format used to learn the model. We then present an Enriched Classification Similarity Learning method that follows a hybrid approach that combines both feature extraction and feature expansion. In particular, we propose a data transformation and the use of a set of standard distances to supplement the information provided by the feature vectors of the training samples. The method is compared to state-of-the-art feature extraction and metric lear…
Il pranzo di Babele. Misunderstanding nel film "Il pranzo di Babette"
2013
“Il pranzo di Babette” (1987), trasposizione cinematografica del regista danese Gabriel Axel dell’omonimo racconto di Karen Blixen, inizialmente contenuto nella raccolta di scritti “Anectodes of Destiny” pubblicato a firma Isak Dinensen (pseudonimo della sua autrice) ha riscosso un unanime consenso di critica e pubblico, vincendo prestigiosi premi quali l’Oscar come miglior film straniero e la menzione speciale della giuria ecumenica del festival di Cannes, sbancando i botteghini in giro per il mondo. Il film è diventato un grande classico del cinema culinario, in grado di radicarsi nel senso comune e diventare pertanto fonte di ispirazione per letterati e cinefili che ne hanno analizzato …
Fast Distributed Subspace Projection via Graph Filters
2018
A significant number of linear inference problems in wireless sensor networks can be solved by projecting the observed signal onto a given subspace. Decentralized approaches avoid the need for performing such an operation at a central processor, thereby reducing congestion and increasing the robustness and the scalability of the network. Unfortunately, existing decentralized approaches either confine themselves to a reduced family of subspace projection tasks or need an infinite number of iterations to obtain the exact projection. To remedy these limitations, this paper develops a framework for computing a wide class of subspace projections in a decentralized fashion by relying on the notio…
Do fire severity effects on soil change in space and time in the short-term? What ash tells us
2013
n the absence of data, the impact of fire, especially wildfires, is measured analysing the fire severity. This post-fire assessment is very useful because allow to identify the degree of destruction imposed by the fire. Among the techniques used to determine fire severity, ash colour is often used, that permit identify the degree of organic matter consumption (darker ash uncompleted combustion, lighter ash completed combustion). The objective of this paper was observed if fire severity changes in space and time, according to ash colour analysis, applying an index. The ash colour analysis was carried out one and fifteen days after the fire. In this area we identified ash with four different …