Search results for " pattern"
showing 10 items of 2245 documents
T-pattern detection and analysis for the discovery of hidden features of behaviour
2018
Abstract Background The behaviour of all living beings consists of hidden patterns in time; consequently, its nature and its underlying dynamics are intrinsically difficult to be perceived and detected by the unaided observer. Method Such a scientific challenge calls for improved means of detection, data handling and analysis. By using a powerful and versatile technique known as T-pattern detection and analysis (TPA) it is possible to unveil hidden relationships among the behavioural events in time. Results TPA is demonstrated to be a solid and versatile tool to study the deep structure of behaviour in different experimental contexts, both in human and non human subjects. Conclusion This re…
For a socio-psychological approach of the concept of racial stacking
2015
AbstractResearch studies focusing on the relationships between team sports and socio- ethnicity have developed in the Anglo-Saxon literature since the 1970s. In particular the use of the concept of racial stacking confirms a growing interest in a more complex vision when it comes to player selection and positioning. In basketball, studies have identified that black players are overrepresented in the American professional basketball championships (NBA) and at the same time patterns of racial stacking exist as they are overrepresented at non-central positions. This research led to a survey of black players’ positions in the professional championships in France (Pro A basketball). Using social…
Desoxyribonuclease-Aktivität im Seminalplasma von normalem und pathologischem Sperma1
2009
Zusammenfassung Das Verteilungsmuster der DNase-Aktivitaten im Seminalplasma von 9 Normalpersonen und 18 Patienten mit einem pathologischen Spermabefund wurde mit dem mikro-disc-elektrophoretischen Verfahren untersucht. Dabei ergaben die Aktivitatsbestimmungen der DNase bei Patienten mit einer Oligoasthenoteratozoospermie als auch bei alien Probanden, die einen pathologischen Spermabefund aufwiesen, in der 1. und 2. Bande deutliche Aktivitatsminderungen im Vergleich zum Seminalplasma von Normalpersonen. Nach den vorliegenden Untersuchungsbefunden stellt sich die Frage, ob den DNasen im Seminalplasma die Aufgabe zukommt, geschadigte und uberalterte Spermatozoen, deren Membran permeabler gewo…
Prevalencia de hipertensión arterial y su asociación con antropometría y dieta en niños (6 a 9 años): estudio aniva
2018
espanolIntroduccion: estudios recientes alertan de cambios en los habitos alimentarios y de un aumento del sobrepeso en ninos como posibles factores de riesgo de una hipertension temprana. Objetivos: conocer la prevalencia de normotension, prehipertension e hipertension en los ninos estudiados y valorar su posible asociacion con la dieta e indicadores antropometricos. Metodos: se realizo un estudio transversal dentro del Proyecto “Antropometria y Nutricion Infantil de Valencia” (ANIVA), donde se valoro dieta, presion arterial y antropometria en 652 ninos/as de entre seis y nueve anos. Se aplicaron los criterios de la Organizacion Mundial de la Salud (OMS) para identificar normotensos, prehi…
Identifying objectives for a learning space management system with value-focused thinking
2017
A classroom with a blackboard and some rows of desks is obsolete in special education. Depending on the needs, some students may need more tactile and inspiring surroundings with various pedagogical accessories while others benefit from a simplified environment without unnecessary stimuli. This understanding is applied to a new Finnish special education school building with open and adaptable learning spaces. We have joined the initiative creation process by developing software support for these new spaces in the form of a learning space management system. Participatory design and value-focused thinking were implemented to elicit the actual values of all the stakeholders involved and transf…
Consensus guidelines for the detection of immunogenic cell death
2014
Apoptotic cells have long been considered as intrinsically tolerogenic or unable to elicit immune responses specific for dead cell-associated antigens. However, multiple stimuli can trigger a functionally peculiar type of apoptotic demise that does not go unnoticed by the adaptive arm of the immune system, which we named "immunogenic cell death" (ICD). ICD is preceded or accompanied by the emission of a series of immunostimulatory damage-associated molecular patterns (DAMPs) in a precise spatiotemporal configuration. Several anticancer agents that have been successfully employed in the clinic for decades, including various chemotherapeutics and radiotherapy, can elicit ICD. Moreover, defect…
A Specialized Architecture for Color Image Edge Detection Based on Clifford Algebra
2013
Edge detection of color images is usually performed by applying the traditional techniques for gray-scale images to the three color channels separately. However, human visual perception does not differentiate colors and processes the image as a whole. Recently, new methods have been proposed that treat RGB color triples as vectors and color images as vector fields. In these approaches, edge detection is obtained extending the classical pattern matching and convolution techniques to vector fields. This paper proposes a hardware implementation of an edge detection method for color images that exploits the definition of geometric product of vectors given in the Clifford algebra framework to ex…
Fast, Reliable Head Tracking Under Varying Illumination
2003
An improved technique for 3D head tracking under varying illumination conditions is proposed. The head is modeled as a texture mapped cylinder. Tracking is formulated as an image registration problem in the cylinder's texture map image. To solve the registration problem in the presence of lighting variation and head motion, the residual error of registration is modeled as a linear combination of texture warping templates and orthogonal illumination templates. Fast and stable on-line tracking is then achieved via regularized weighted least squares minimization of the registration error. The regularization term tends to limit potential ambiguities that arise in the warping and illumination te…
Spatio-temporal cluster detection of chickenpox in Valencia, Spain in the period 2008-2012.
2015
Chickenpox is a highly contagious airborne disease caused by <em>Varicella zoster</em>, which affects nearly all non-immune children worldwide with an annual incidence estimated at 80-90 million cases. To analyze the spatiotemporal pattern of the chickenpox incidence in the city of Valencia, Spain two complementary statistical approaches were used. First, we evaluated the existence of clusters and spatio-temporal interaction; secondly, we used this information to find the locations of the spatio-temporal clusters via the space-time permutation model. The first method used detects any aggregation in our data but does not provide the spatial and temporal information. The second me…
Comparison of region of interest segmentation methods for video-based heart rate measurements
2018
International audience; Conventional contact photoplethysmography (PPG) sensors are not suitable in situations of skin damage or when unconstrained movement is required. As a consequence, remote photoplethysmography (rPPG) has recently emerged because it provides remote physiological measurements without expensive hardware and improves comfort for long-term monitoring. RPPG estimation methods use the spatially averaged RGB values of pixels in a Region Of Interest (ROI) to generate a temporal RGB signal. The selection of ROI is a critical first step to obtain reliable pulse signals and must contain as many skin pixels as possible with a low percentage of non-skin pixels. In this paper, we ex…