Search results for "technics"
showing 10 items of 67 documents
Copper(I) Bromide: An Alternative Emitter for Blue-Colored Flame Pyrotechnics.
2015
Copper(I) bromide was evaluated as an alternative emitter for blue flame pyrotechnic compositions. CuBr and CuCl emission spectra were recorded from a butane torch flame and compared. Cu(BrO3 )2 was synthesized and used in pyrotechnic compositions as an oxidizer and the source for the generation of CuBr species. Pyrotechnic compositions, which contained copper and potassium bromates as oxidizers, were optimized for the generation of blue flames. The experimental data, including emission spectra of the flames, chromaticity coordinates, burning rates, luminous intensities, and sensitivity tests, were analyzed and compared.
LA COPERTURA IN FERRO DEL POLITEAMA GARIBALDI. UNA INNOVATIVA SPERIMENTAZIONE NELLA PALERMO DEL XIX SECOLO
2015
The roofing of the nineteenth Politeama Garibaldi in Palermo creates to the designer, Giuseppe Damiani Almeyda, technical and architectural difficulties: in fact, if the scene roofing has been resolved applying established schemes, for the roofing of the stalls area, made years later, an efficient connection with the existing roofing and the external walls was manifested. The goal of this study is the knowledge of the iron structure, the production and processing techniques adopted for the realization of the roofing, also aimed to the recognition of the inspiring structural models, the connecting systems, the state of preservation. Through the analysis of the used shapes and techniques, the…
Synthèse sur la détection des produits issus des nouvelles technologies génomiques (NGT) appliquées aux plantes. Paris, Paris, le 26 novembre 2021
2021
Synthèse sur la détection des produits issus des nouvelles technologies génomiques (NGT) appliquées aux plantesLa question du statut réglementaire des NGT (New Genomic Techniques), qui ont été définies comme techniques de modification du génome « apparues » depuis 2001 , est actuellement débattue en Europe. Ces techniques n’existaient pas, ou étaient peu développées lors de l’adoption des directives et règlements européens qui encadrent actuellement les organismes génétiquement modifiés (OGM). A l’époque le législateur européen avait choisi de réglementer les techniques de transgénèse et d’exempter les méthodes de mutagénèse notamment sur la base d’une expérience d’usage n’ayant révélé aucu…
Storia di due alberi. Il tecnopaesaggio meridiano nei film industriali del miracolo economico
2021
The transformation of Southern landscape after the construction of new infrastructures is a crucial theme in most techno-films released during the Italian economic miracle. Here, the traditional landscape is integrated with elements formerly unknown, giving birth to an original hybrid of technics and nature. This paper analyses the images of this rising “techno-landscape” by questioning the strategies that represent it as a form, as a point of view, and as an experience, thus making it a distinctive element of Italian modernity.
DeepIndices : Une nouvelle approche des indices de télédétection basée sur l'optimisation et l'approximation de fonctions par DeepLearning. Applicati…
2021
National audience; L'une des avancées les plus importantes dans le domaine de l'observation de la terre est la découverte des indices spectraux, ils ont notamment prouvé leur efficacité dans la caractérisation des surfaces agricoles, mais ils sont généralement définis de manière empirique. Cette étude basée sur l'intelligence artificielle et le traitement du signal, propose une méthode pour trouver un indice optimal. Et porte sur l'analyse d'images issues d'une caméra multi-spectrale, utilisée dans un contexte agricole pour l'acquisition en champ proche de végétation. À partir de six bandes spectrales, cinq modèles ont été testés et déployés dans un framework d'apprentissage profond. Les pe…
Weed detection by aerial imaging: impact of soil, crop and weed spectral mixing
2015
International audience; This study aims to evaluate spectral information potential of images captured with a UAV, for site specific weed management. The image acquisition chain was modeled in order to compute the digital values of image pixels, according to the field conditions and objects lying on the ground surface projected in the pixels. The object spectra are mixed in the same pixel to estimate the impact of the spatial resolution of the image. The classification potential into crop, weed and soil classes was studied usinf simulations based on the present multispectral sensor characteristics and according to different mixing rates.
Les impacts du campagnol terrestre sur les systèmes fourragers : le cas de l’élevage bovin allaitant en Bourgogne
2014
EAAgroSupECOLDUR; Do vole outbreaks have the same effects on suckler beef farms in Burgundy as they do on daily farms in Auvergne and Franche-Comte? Semi-structured interviews were carried out with 19 farmers from Burgundy who had been affected by a water vole outbreak in 2011. The results indicate that, just like farmers in Auvergne and Franche-Comte, farmers in Burgundy witnessed a decrease in forage quantity and quality. Farmers used diverse measures to deal with the outbreak (e.g., avoidance strategies or the use of bromadiolone). Farmers that described water voles as pests were more likely to have used bromadiolone, while those who described water voles in morphological terms or in ter…
Capteurs et images aériennes pour l’évaluation du peuplement de mauvaises herbes
2013
AIRINOV is specialized in use of UAV for precision agriculture. Thanks to a high spatial resolution up to 1.5 cm/pixel in RGB images, discrimination between vegetation (crop row, weed) and soil can be done. Variability can be detected in weed density inside the whole field. The detection of weeds in the inter-row of hoed row crops was tested on RGB images. The methodology developed is based on Hough transform, and is composed of three main steps: image segmentation, soil/vegetation discrimination and crop rows localization. First results are promising but need complementary measures for validation.
Simulateur de pulvérisation localisée d’herbicide
2019
Site-specific spraying is a technological lever to reduce the herbicide amount used in the case of chemical control of weeds. At the present time, detection and control technologies are available to apply herbicide only where weeds are present and thus provide an alternative to homogeneous application of chemicals on the entire surface of the field. In order to assess this practice, a digital simulator has been developed combining virtual infestation maps with different theoretical sprayer configurations. Simulations were used to localize herbicide applications and quantify herbicide reduction based on the spatial distribution of weeds and the width of independent spray units (boom sections…
Analysis of the relationship between production situation drivers and cropping systems at the regional scale
2014
International audience