Abnormal Infant Movements Classification With Deep Learning on Pose-Based Features

The pursuit of early diagnosis of cerebral palsy has been an active research area with some very promising results using tools such as the General Movements Assessment (GMA). In our previous work, we explored the feasibility of extracting pose-based features from video sequences to automatically classify infant body movement into two categories, normal and abnormal. The classification was based upon the GMA, which was carried out on the video data by an independent expert reviewer. In this paper we extend our previous work by extracting the normalised pose-based feature sets, Histograms of Joint Orientation 2D (HOJO2D) and Histograms of Joint Displacement 2D (HOJD2D), for use in new deep learning architectures. We explore the viability of using these pose-based feature sets for automated classification within a deep learning framework by carrying out extensive experiments on five new deep learning architectures. Experimental results show that the proposed fully connected neural network FCNet performed robustly across different feature sets. Furthermore, the proposed convolutional neural network architectures demonstrated excellent performance in handling features in higher dimensionality. We make the code, extracted features and associated GMA labels publicly available

Field Measurements of Unsteady Turbulence in a Tidal Bore: the Garonne River in October 2013

A tidal bore is an unsteady rapidly-varied open channel flow generated by the swift advance of the early flood tide in a funnel-shaped river estuary when the tidal range exceeds 4.5 to 6 m. This contribution presents a detailed field investigation conducted on the tidal bore of the Garonne River (France). The bore was undular and the bore's leading edge was followed by well-defined secondary waves, or whelps. The instantaneous ADV velocity data indicated large and rapid fluctuations of all velocity components during the tidal bore. Large Reynolds shear stresses were observed during and after the tidal bore passage. The investigation characterized some unusual transient turbulence caused by the bore propagation in a large river system, and the results suggested the advection of large-scale eddies in the wake of the bore front. The present study highlighted the need for detailed field measurements with fine temporal resolution, to characterize the highly unsteady rapidly-varied nature of tidal bore flows

Fluid flow and sediment entrainment in the Garonne River bore and tidal bore collision

A detailed field study was carried out on a tidal bore to document the turbulent processes and sediment entrainment which occurred. The measured bore, within the Arcins Channel of the Garonne River ( France), was undular in nature and was followed by well-defined secondary wave motion. Due to the local river geometry a collision between the Arcins channel tidal bore and the bore which formed within the main Garonne River channel was observed about 800m upstream of the sampling site. This bore collision generated a transient standing wave with a black water mixing zone. Following this collision the bore from the main Garonne River channel propagated 'backward' to the downstream end of the Arcins channel. Velocity measurements with a fine temporal resolution were complemented by measurements of the sediment concentration and river level. The instantaneous velocity data indicated large and rapid fluctuations of all velocity components during the tidal bore. Large Reynolds shear stresses were observed during and after the tidal bore passage, including during the 'backward' bore propagation. Large suspended sediment concentration estimates were recorded and the suspended sediment flux data showed some substantial sediment motion, consistent with the murky appearance of the flood tide waters. Copyright (C) 2015 John Wiley & Sons, Ltd

Non-targeted metabolic profiling of BW312 Hordeum vulgare semi dwarf mutant using UHPLC coupled to QTOF high resolution mass spectrometry

Abstract Barley (Hordeum vulgare) is the fourth crop cultivated in the world for human consumption and animal feed, making it important to breed healthy and productive plants. Among the threats for barley are lodging, diseases, and pathogens. To avoid lodging, dwarf and semi-dwarf mutants have been selected through breeding processes. Most of these mutants are affected on hormonal biosynthesis or signalling. Here, we present the metabolic characterization of a brassinosteroid insensitive semi-dwarf mutant, BW312. The hormone profile was determined through a targeted metabolomics analysis by UHPLC-triple quadrupole-MS/MS, showing an induction of gibberellic acid and jasmonic acid in the semi-dwarf mutant. A non-targeted metabolomics analysis by UHPLC-QTOF-MS/MS revealed a differential metabolic profile, with 16 and 9 metabolites showing higher intensities in the mutant and wild-type plants respectively. Among these metabolites, azelaic acid was identified. Gibberellic acid, jasmonic acid, and azelaic acid are involved in pathogen resistance, showing that this semi-dwarf line has an enhanced basal pathogen resistance in absence of pathogens, and therefore is of interest in breeding programs to fight against lodging, but also probably to increase pathogen resistance

Compact Patch Antenna for Automatic Identification System (AIS)

International audienceThis paper presents a radiating element developed for the space AIS application. This element is a compact sized and reduced mass microstrip patch antenna integrating frequency resonant adjustment devices. Theoretical and experimental results with good agreement are presented

Mean Oriented Riesz Features for Micro Expression Classification

Micro-expressions are brief and subtle facial expressions that go on and off the face in a fraction of a second. This kind of facial expressions usually occurs in high stake situations and is considered to reflect a human's real intent. There has been some interest in micro-expression analysis, however, a great majority of the methods are based on classically established computer vision methods such as local binary patterns, histogram of gradients and optical flow. A novel methodology for micro-expression recognition using the Riesz pyramid, a multi-scale steerable Hilbert transform is presented. In fact, an image sequence is transformed with this tool, then the image phase variations are extracted and filtered as proxies for motion. Furthermore, the dominant orientation constancy from the Riesz transform is exploited to average the micro-expression sequence into an image pair. Based on that, the Mean Oriented Riesz Feature description is introduced. Finally the performance of our methods are tested in two spontaneous micro-expressions databases and compared to state-of-the-art methods

Special symposium: In vitro plant recalcitrance loss of plant organogenic totipotency in the course of In vitro neoplastic progression

Summary: The aptitude for organogenesis from normal hormone-dependent cultures very commonly decreases as the tissues are serially subcultured. The reasons for the loss of regenerative ability may vary under different circumstances: genetic variation in the cell population, epigenetic changes, disappearance of an organogenesis-promoting substance, etc. The same reasons may be evoked for the progressive and eventually irreversible loss of organogenic totipotency in the course of neoplastic progressions from hormone-independent tumors and hyperhydric teratomas to cancers. As in animal cells, plant cells at the end of a neoplastic progression have probably undergone several independent genetic accidents with cumulative effects. They indeed are characterized by atypical biochemical cycles from which they are apparently unable to escape. The metabolic changes are probably not the primary defects that cause cancer, rather they may allow the cells to survive. How these changes, namely an oxidative stress, affect organogenesis is not known. The literature focuses on somatic mutations and epigenetic changes that cause aberrant regulation of cell cycle genes and their machiner

Quelles sont les conditions à réunir pour une intégration marchande porteuse de développement durable pour les paysanneries andines ?

Cet article se propose d’identifier les conditions à réunir pour qu’une intégration marchande économiquement pérenne, socialement partagée et qui ne menace pas la reproduction des écosystèmes qui en sont le support, devienne possible. La réflexion est adossée à une comparaison entre les dynamiques d’intégration marchande de deux régions andines : d’une part, les hautes terres d’Altamachi (Cordillère de Cochabamba, Bolivie) où un développement spectaculaire de la production de pomme de terre destinée au marché urbain a vu le jour, et d’autre part, la haute vallée du Rio Castrovirreyna (dans les Andes sèches péruviennes) engagée elle aussi dans un mouvement de quasi-spécialisation laitière tournée vers le marché intérieur. Dans les deux cas étudiés, les avantages comparatifs de l’une ou l’autre région pour telle ou telle production ne suffisent pas à expliquer, loin s’en faut, les dynamiques en cours. Les modalités d’accès et de gestion, individuelles et collectives, des ressources, le développement des possibilités de transport et le maintien de prix relativement rémunérateurs ont été des conditions indispensables à cette spécialisation marchande.What are the conditions for a market integration bearing sustainable development for Andean peasantry? This paper aims to identify the conditions for an economically sustainable and socially shared market integration, which does not threaten the ecosystems reproduction. The analysis is based on a comparison between market integration dynamics in two Andean regions: on the one hand, the Altamachi Highlands (cordillera of Cochabamba, Bolivia) where a spectacular development of potato production for the urban market is taking place and on the other hand, the Rio Castrovirreyna high valley (in the Peruvian dry Andes), pursuing a trend of dairy quasi-specialisation turned towards domestic market. In both cases, the comparative advantages of each region for potato or milk production alone do not allow to explain the dynamic observed. Individual and collective land resources management rules, transportation possibilities improvement and remunerative prices maintenance have been necessary conditions for this market specialisation

A Novel Arch-Shaped Hybrid Composite Triboelectric Generator Using Carbon Fiber Reinforced Polymers

With the diminution of energy sources and the need for using cleaner energy, alternatives must be found. In addition, the desire to supply energy to autonomous low-power electronics has spurred interest in triboelectric materials. An arch-shaped hybrid carbon fiber reinforced polymer (CFRP) composite triboelectric device is fabricated, which employs a curved upper copper electrode and a flat lower polyimide layer, both of which are combined with CFRP materials. This device can be used as a triboelectric energy harvesting source for self-powered sensors that can be combined with fiber reinforced composite-based structures. A voltage up to 300 mV is produced, which can charge a capacitor to 250 mV. The ability to combine triboelectric and CFRP materials provides a new approach to integrate energy harvesting into engineering structures and manufacture robust harvesting devices.</p

La terre crue, matériau universel

Disponible, plastique, recyclable, la terre convient pour bâtir toutes formes et dimensions de constructions. Mais qu’en est-il de l’évolution de ces techniques constructives et de l’intérêt que les populations anciennes comme actuelles lui portent de par le monde ? © Romain Etienne/ITEM Hubert Guillaud Lorsque j’ai commencé à m’intéresser à la construction en terre, c’était en lien avec les questions d’énergie, à la suite de la crise des années 1970. Les seules alternatives qui se développa..