Search results for "Symbol"
showing 10 items of 7541 documents
ECG Analysis for Ventricular Fibrillation Detection Using a Boltzmann Network
2015
Arrhythmias consist on electrical alterations in the heart beat control. They can be identified by means of surface ECG leads. The main goal of this work is to provide a signal classification based on ECG signal waveform in the time-frequency domain especially targeted to Ventricular Fibrillation detection. The use of a classifier based on a Boltzmann network is proposed. However, a previous signal preprocessing is also required so that the Boltzmann network is fed with the appropriate data. In this case, an R-wave detector is used; after that, the Pseudo Wigner-Ville time-frequency distribution is obtained. This distribution is used to train and test the network, which handles it as an ima…
Dopplersonographische Blutflußmessung der A. umbilicalis: Ist ein Screening sinnvoll?
1989
Die Röntgendigitalanlage als Instrument zur kinematischen Untersuchung der Schulter — Eine Untersuchung zur Strahlenbelastung - Digital Radiography a…
1991
The radiation exposure during biomechanical investigation of the shoulder joint done with a digital radiography system (Polytron 1000 VR - Siemens) was measured experimentally. Total radiation dose and surface dose were determined by phantom measurements. The radiation exposure per image is about 1/6 to 1/7 of that of a conventional study. The digital radiography system used is thus suitable for kinesiologic studies of large joints in healthy volunteers.
Mapping symbols to sounds: electrophysiological correlates of the impaired reading process in dyslexia
2012
Dyslexic and control first-grade school children were compared in a Symbol-to-Sound matching test based on a non-linguistic audiovisual training which is known to have a remediating effect on dyslexia. Visual symbol patterns had to be matched with predicted sound patterns. Sounds incongruent with the corresponding visual symbol (thus not matching the prediction) elicited the N2b and P3a event-related potential (ERP) components relative to congruent sounds in control children. Their ERPs resembled the ERP effects previously reported for healthy adults with this paradigm. In dyslexic children, N2b onset latency was delayed and its amplitude significantly reduced over left hemisphere whereas P…
Is telephone follow-up useful in preventing post-extraction bleeding in patients on antithrombotic treatment?
2021
Background The aim of the study was to investigate the usefulness of telephone follow-up in preventing post-extraction bleeding and improving wound healing in patients on chronic antithrombotic treatment. Material and methods A prospective randomized clinical trial was carried out on 256 patients (test group = 128; control group = 128). The exact two-tailed Fisher test and the two-tailed non-parametric Mann-Whitney test were used for statistical analysis. Results The incidence of post-extraction bleeding was 15.6% and there was no difference between test and control groups. However, the study group was significantly, though weakly, associated with the severity of bleeding. Patient satisfact…
Puhdistumisen ja valaistumisen ideat : taiteilija Ninni Heldtin Kylpijät-kuvasarjan kuvallinen ja filosofinen tulkinta
2014
Tiivistelmä – Abstract Tutkielmassani tarkistan helsinkiläisen taiteilijan Ninni Heldtin Kylpijät kuvasarja. Kuvasarja edustaa Ninni Heldtin eräänlaista ihmistä, naiseksi ja taiteilijaksi kasvun prosessia, joka taiteilija on kokenut itämaisen sahaja joogan ja filosofian harrastuksien kautta ja jotka hän on tuonut näkyviin Kylpijät-nimisessä kuvasarjassa henkisen puhdistumisen ja valaistumisen ideoiden kautta. Ideaa henkisestä puhdistumisesta ja kylpemisestä taiteilija alkoi työstää vuodesta 2010 lähtien. Tällä hetkellä Kylpijä-nimistä teosta on 15 kappaletta. Mahdollisesti taiteilija jatkaa työstää ajatusta lähivuosina. Kylpijät esittävät nimettömiä, puoleksi alastomia, puoleksi pyyheliina-…
Rumor de pañuelo blanco: historia, memoria y representaciones literarias de Abuelas de Plaza de Mayo
2018
El 24 de marzo de 2016 se cumplieron 40 años del golpe de Estado del autodenominado Proceso de Reorganización Nacional que condujo a siete años de una sangrienta dictadura en Argentina. De entre las organizaciones de Derechos Humanos que surgieron como respuesta a las desapariciones ilegales de militantes y de civiles, las Madres y Abuelas de Plaza de Mayo se han constituido, tanto a nivel nacional como internacional, en evidencia de la historia de violencia y en símbolo de paz; como tales también han entrado en el plano de la ficción. Teniendo en cuenta estas líneas, en el presente trabajo se realiza, primero, un recorrido por la historia de las Abuelas de Plaza de Mayo y el cambio polític…
Model, software and database for line-mixing effects in the ν3 and ν4 bands of CH4 and tests using laboratory and planetary measurements-I: N2(and ai…
2006
International audience; Absorption spectra of the infrared ν3 and ν4 bands of CH4 perturbed by N2 over large ranges of pressure and temperature have been measured in the laboratory. A theoretical approach accounting for line mixing is proposed to (successfully) model these experiments. It is similar to that of Pieroni et al. [J Chem Phys 1999;110:7717–32] and is based on state-to-state rotational cross-sections calculated with a semi-classical approach and a few empirical parameters. The latter, which enable switching from the state space to the line space, are deduced from a fit of a single room temperature spectrum of the ν3 band at 50 atm. The comparisons between numerous measured and ca…
Simbolismo animal y teratología en las Cantigas de Santa María
2006
L'animal comme reflet des craintes de l'homme. Rapport entre l'animal réel (de basse-cour ou fauve) l'animal imaginé (monstre, être démoniaque composite) et l'être difforme. Le corps physique perçu comme un signe de Dieu.