Search results for "domain"
showing 10 items of 2485 documents
Bearing fault detection based on time-frequency representations of vibration signals
2015
To prevent failures of a rolling bearing in the gearbox drive system, acceleration sensors are used to detect fault-related signals of the bearing. It is a big challenge to observe and identify signals caused by bearing defects in the time domain or the frequency spectrum by a conventional Fourier analysis. The time-frequency representation of the fault-related signals implemented by the windowed Fourier transform is studied in this work. It is shown that the fault characteristic frequencies can be clearly identified in the time-frequency spectrum if a fault occurs in the bearing of the gearbox at different speeds. Otherwise, the shaft frequency and its multiples are the main harmonics in t…
Classifying DME vs Normal SD-OCT volumes: A review
2016
International audience; This article reviews the current state of automatic classification methodologies to identify Diabetic Macular Edema (DME) versus normal subjects based on Spectral Domain OCT (SD-OCT) data. Addressing this classification problem has valuable interest since early detection and treatment of DME play a major role to prevent eye adverse effects such as blindness. The main contribution of this article is to cover the lack of a public dataset and benchmark suited for classifying DME and normal SD-OCT volumes, providing our own implementation of the most relevant methodologies in the literature. Subsequently, 6 different methods were implemented and evaluated using this comm…
Classification of SD-OCT Volumes with LBP: Application to DME Detection
2015
International audience; This paper addresses the problem of automatic classification of Spectral Domain OCT (SD-OCT) data for automatic identification of patients with Diabetic Macular Edema (DME) versus normal subjects. Our method is based on Local Binary Patterns (LBP) features to describe the texture of Optical Coherence Tomography (OCT) images and we compare different LBP features extraction approaches to compute a single signature for the whole OCT volume. Experimental results with two datasets of respectively 32 and 30 OCT volumes show that regardless of using low or high level representations, features derived from LBP texture have highly discriminative power. Moreover, the experimen…
Optomotor-blind negatively regulates Drosophila eye development by blocking Jak/STAT signaling
2015
Organ formation requires a delicate balance of positive and negative regulators. In Drosophila eye development, wingless (wg) is expressed at the lateral margins of the eye disc and serves to block retinal development. The T-box gene optomotor-blind (omb) is expressed in a similar pattern and is regulated by Wg. Omb mediates part of Wg activity in blocking eye development. Omb exerts its function primarily by blocking cell proliferation. These effects occur predominantly in the ventral margin. Our results suggest that the primary effect of Omb is the blocking of Jak/STAT signaling by repressing transcription of upd which encodes the Jak receptor ligand Unpaired.
Reply to comment by Ngako and Njonfang on “The Adamawa-Yade domain, a piece of Archaean crust in the Neoproterozoic Central African Orogenic belt (Ba…
2018
Abstract V. Ngako and E. Njonfang addressed in their comment an interesting and debated issue about the collision geodynamics of the Pan-African Central African Orogenic Belt (CAOB) in Cameroon. However, the reason for this comment is still not clear to us since it mainly deals with issues far away from the scope of our study, namely, the pre-collisional set up of the belt. The comment raises two main points – the reworking process during plate collision and the Pan-African strain pattern – not discussed in our paper for the simple reason that it was not our goal and because our data set does not even allow such discussion. Having said that, the comment gives us the opportunity to clarify o…
SIGNIFICANCE FOR INTERNATIONAL CORRELATION OF THE PERAPERTÚ FORMATION IN NORTHERN PALENCIA, CANTABRIAN MOUNTAINS. TECTONIC/STRATIGRAPHIC CONTEXT AND …
2021
Small ammonoid assemblages are recorded from the Perapertú Formation in northern Palencia. This is a mudstone unit with local platform limestones characterised by carbonate debris flows on the limestone margins. This unit, of Late Bashkirian to Early Moscovian age, participates in a series of southwards verging thrust slicesNorth of a major fault zone which originated as the head (leading edge) of a large thrust sheet with an internal deformation consisting of thrust slices and at least one nappe structure. Opposed vergencies at the head of this major thrust sheet (Carrionas Thrust Front) and the Ruesga Fault which locally modifies its trace, mark the position where the northern branch of t…
Sociolinguistic Resilience Among Young Academics. A Quantitative Analysis in Germany and France
2021
International audience; Already Friedrich Schiller was convinced that language mirrors a nation. If this is the case, then the often deplored ‘brutalization of language’, which has almost become a buzzword in the wake of the refugee crisis in Germany that started in 2015, points to a serious social crisis by raising questions of (national) identity and self-understanding. Based on newly introduced sociolinguistic resilience concept in line with the concept of group focus enmity (GFE) combining the dimensions of co-adaptation and co-evolution of linguistic signs, this article presents preliminary empirical evidence of a ‘classroom’ survey conducted among students in four university towns in …
L'utopie au jour le jour. Une histoire des expériences coopératives, XIXe-XXIe siècle
2020
International audience; En cette période de crise économique et de remise en cause du capitalisme, la coopération revient à la mode. Mais on ignore encore beaucoup de l’histoire de ce mode d’organisation qui prétend mettre la démocratie au cœur de l’économie. Si les cadres institutionnels, et les débats théoriques que les coopératives ont suscités depuis le début du XIXe siècle sont bien connus, leur histoire pratique reste largement ignorée. Que se passe-t-il une fois franchie la porte de la cave coopérative, du magasin ou de l’atelier ? Comment s’organise, au jour le jour, le travail des coopérateurs ? Quand peut-on dire qu’une coopérative est une réussite ? Et comment ses membres partici…
Cross-domain mapping processes in the perception of post tonal music
2009
Theories of embodied cognition state that knowledge is built by means of cross-domain mapping processes between different domains of experience. Recent research informs about the presence of mapping processes in the reception of both tonal and atonal music. A previous experiment suggested the occurrence of mappings between visual attributes and interpretative features in atonal music. However, these results were obtained with musicians; therefore, it is unknown to what extent they are equally valid to non-musicians. This study aims at examining the incidence of interpretative expression within the visual-musical mapping process. Three versions (two expressive and one deadpan) of an atonal m…