Letteratura scientifica selezionata sul tema "LED hybride"
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Articoli di riviste sul tema "LED hybride"
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Gatter, Thomas, e Peter F. Stadler. "Kosteneffektive hybride Genomassemblierung mit LazyB". BIOspektrum 28, n. 3 (maggio 2022): 283–86. http://dx.doi.org/10.1007/s12268-022-1762-1.
Testo completoAbstract (sommario):
AbstractAdvances in genome sequencing have led to a paradigm shift where project costs are no longer limited by sequencing costs but rather by the computational problems associated with genome assembly. There is an urgent demand for more efficient and accurate methods, in particular for complex genomes. The combination of traditional second and emerging third generation sequencing offers unique benefits. Our own method LazyB enables the resource efficient assembly of low abundant datasets.
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Abashkin, V. M., I. V. Halets-Bu, V. G. Dzmitruk, M. Bryszewska, D. G. Shcharbin, M. Odabaşı, Ö. Acet, B. Önal e N. Özdemir. "Hybride metall-organic nanoflowers and their applications in biotechnology". Proceedings of the National Academy of Sciences of Belarus, Biological Series 64, n. 3 (17 agosto 2019): 374–84. http://dx.doi.org/10.29235/1029-8940-2019-64-3-374-384.
Testo completoAbstract (sommario):
Among the variety of modern nanomaterials a special class – nanoflowers can be distinguished. These new nanostructures have induced the interest of scientists due to the topographic features of nanolayers, the special location of which allows a higher surface-to-volume ratio compared to classical spherical nanoparticles. Such topographic structure significantly increases the efficiency of surface reactions for nanoflowers. The main purpose of this type of nanomaterials is their use as enzyme stabilizers. Enzymes are biosystems with high activity and substrate specificity, but their use is limited by certain disadvantages, such as high sensitivity to the environment, low reproducibility of experimental results and requirements for complex purification of the components. To facilitate the functioning of enzymes in various conditions, organicinorganic hybrid nanomaterials have been developed, the name of which indicates that all components of inorganic nanoparticles are associated with organic materials. These nanoparticles have numerous promising applications in catalysis, as biosensors, and for drug delivery. Organic-inorganic hybrid nanoflowers have led to the development of a new branch of chemistry – the chemistry of hybrid nanomaterials, whose research is currently undergoing rapid development. Thus, the study of organic-inorganic hybrid nanocrystals can lead to new creative solutions in the field of chemistry of enzyme systems and the rapid development of bionanomaterials and new branches of biotechnology.
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Sistiawan, Yuda Agus Tri, e Pamor Gunoto. "PERANCANGAN PEMBANGIT LISTRIK TENAGA HYBRIDE (TENAGA SURYA DAN TENAGA ANGIN) DENGAN KAPASITAS 20 W". SIGMA TEKNIKA 2, n. 1 (8 agosto 2019): 49. http://dx.doi.org/10.33373/sigma.v2i1.1806.
Testo completoAbstract (sommario):
Penggunaan energi fossil yang selama ini merupakan sumber energy utama ketersedianya sangat terbatas dan sangat menipis bahan bakar tersbut. Oleh sebab itu perlu dicari energi alternatif sebagai pengganti energi fosil dimasa akan datang. Salah satu energi alternatif yang dapat digunakan tersebut adalah energi matahari dan energi angin. Dalam hal ini penggunaannya diperlukan suatu media yang dapat merubah kedua energi itu menjadi energi listrik. Perangkat ini menggunakan sebuah panel sel surya dan turbin angin untuk merancang pembangkit listrik tenaga hybride ( tenaga surya dan tenaga angin). Dalam perancangan ini dihasilkan energi gabungan dengan tegangan 12 Volt dan daya sebesar 20 Watt yang digunakan untuk menghidupkan lampu LED sebesar 15 Watt.
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Comeault, Aaron A., e Daniel R. Matute. "Genetic divergence and the number of hybridizing species affect the path to homoploid hybrid speciation". Proceedings of the National Academy of Sciences 115, n. 39 (12 settembre 2018): 9761–66. http://dx.doi.org/10.1073/pnas.1809685115.
Testo completoAbstract (sommario):
Hybridization is often maladaptive and in some instances has led to the loss of biodiversity. However, hybridization can also promote speciation, such as during homoploid hybrid speciation, thereby generating biodiversity. Despite examples of homoploid hybrid species, the importance of hybridization as a speciation mechanism is still widely debated, and we lack a general understanding of the conditions most likely to generate homoploid hybrid species. Here we show that the level of genetic divergence between hybridizing species has a large effect on the probability that their hybrids evolve reproductive isolation. We find that populations of hybrids formed by parental species with intermediate levels of divergence were more likely to mate assortatively, and discriminate against their parental species, than those generated from weakly or strongly diverged parental species. Reproductive isolation was also found between hybrid populations, suggesting differential sorting of parental traits across populations. Finally, hybrid populations derived from three species were more likely to evolve reproductive isolation than those derived from two species, supporting arguments that hybridization-supplied genetic diversity can lead to the evolution of novel “adaptive systems” and promote speciation. Our results illustrate when we expect hybridization and admixture to promote hybrid speciation. Whether homoploid hybrid speciation is a common speciation mechanism in general remains an outstanding empirical question.
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IP Singh, Abhishek Bohra, Satheesh Naik SJ e Ashok Kumar Parihar. "Pigeonpea hybrid breeding in India". Journal of Food Legumes 37, n. 1 (15 maggio 2024): 1–10. http://dx.doi.org/10.59797/jfl.v37.i1.172.
Testo completoAbstract (sommario):
The constantly increasing gap in the demand to supply for pigeon pea has been a matter of concern to pigeon pea researchers in India to increase productivity and production. The entomophily abet cross-pollination behavior of pigeon pea is a desirable crop to develop and establish the hybrid system to exploit the commercial heterosis. Keeping this in view, pigeon pea research was directed towards a new initiative on hybrid pigeon pea breeding at ICRISAT, Hyderabad immediately after the identification of a male sterile line in 1974. Which in turn led to the development of a new GMS hybrid called ICPH 8 in 1991 for cultivation in the central zone. Then five GMS hybrids (PPH 4, CoPH 1, CoPH 2, AKPH 4101, and AKPH 2022) in the early maturing group were released by the state and central varietal release committee. Nevertheless, the GMS-based hybrids did not yield much success due to difficulty in the production of commercial F1 seed. Trifurcation of All India Coordinated Pulses Improvement (AICPIP) and further strengthening of AICPRP on pigeon pea led to the development of national level strategic and basic research vis-àvis provided testing platform for varieties and hybrids. The advertent GMS system led to the development of a stable and economically viable CGMS system in pigeon pea after 26 years of its first GMS initiative. The first CGMS line GT 288A and its maintainer B line was registered by Pulse Research Station, SDAU, GAU, SK Nagar, Gujarat in 2000. Consequently, in 2006 the first CMS hybrid GTH 1 was developed by SDAU, Gujarat, and released by CVRC for cultivation in the central zone. Thirty-nine CGMS lines have been registered with ICAR-NBPGR and four CMS-based hybrids (ICPH 2671, ICPH 2740, IPH 15-03, and IPH 09-5) are released for cultivation. It is to endorse that the joint efforts of the ICAR-NARS and ICRISAT led to the establishment of the hybrid system in pigeon pea by sharing the materials and technology. Nonetheless, supplying quality hybrid seed is a mammoth task to reap the true potential of hybrid technology in pigeon pea.
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Gourlay, James, e Ian Miller. "74.2: High Efficiency Hybrid LED Backlight for Large-area LCD TV". SID Symposium Digest of Technical Papers 41, n. 1 (2010): 1097. http://dx.doi.org/10.1889/1.3499845.
Testo completo
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Nouhaud, Pierre, Simon H. Martin, Beatriz Portinha, Vitor C. Sousa e Jonna Kulmuni. "Rapid and predictable genome evolution across three hybrid ant populations". PLOS Biology 20, n. 12 (20 dicembre 2022): e3001914. http://dx.doi.org/10.1371/journal.pbio.3001914.
Testo completoAbstract (sommario):
Hybridization is frequent in the wild but it is unclear when admixture events lead to predictable outcomes and if so, at what timescale. We show that selection led to correlated sorting of genetic variation rapidly after admixture in 3 hybrid Formica aquilonia × F. polyctena ant populations. Removal of ancestry from the species with the lowest effective population size happened in all populations, consistent with purging of deleterious load. This process was modulated by recombination rate variation and the density of functional sites. Moreover, haplotypes with signatures of positive selection in either species were more likely to fix in hybrids. These mechanisms led to mosaic genomes with comparable ancestry proportions. Our work demonstrates predictable evolution over short timescales after admixture in nature.
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Lu, Ye, e Bing Yan. "Lanthanide organic–inorganic hybrids based on functionalized metal–organic frameworks (MOFs) for a near-UV white LED". Chem. Commun. 50, n. 97 (2014): 15443–46. http://dx.doi.org/10.1039/c4cc07852g.
Testo completoAbstract (sommario):
A novel near-UV white LED based on lanthanide organic–inorganic hybrid material is realized through postsynthetically modified MOFs and MOF-based polymers. The hybrids materials have high quantum yield and satisfactory luminescence stability; the assembled white LED has tuneable correlated color temperature and high color rendering index.
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Pédron-Colombani, Sylvie. "El culto de Maximón en Guatemala. Entre procesos de reivindicación indígena y de reapropriación mestiza". Revista Trace, n. 54 (5 luglio 2018): 31. http://dx.doi.org/10.22134/trace.54.2008.309.
Testo completoAbstract (sommario):
Resumen: Este artículo se enfoca en la figura de Maximón, deidad sincrética de Guatemala, en un contexto de desplazamiento de la religión católica popular por parte de las iglesias protestantes. Esta divinidad híbrida a la cual se agregan santos católicos como Judas Iscariote o el dios maya Mam, permite la apropiación de Maximón por segmentos diferenciados de la población (tanto indígena como mestiza). Permite igualmente ser símbolo de protestas sociales enmascaradas cuando se asocia Maximón con figuras de hombres políticos corruptos, finqueros, hasta militares. En el contexto de conversiones amplias al pentecostalismo, el culto afirma hoy en día representar la costumbre relacionada a la herencia maya, frente a la importancia cada día más fuerte de las Iglesias pentecostales. Actualmente, en un contexto de internacionalización y de competencia del universo religioso, la dinámica del culto se adaptó y propone una dimensión de espectáculo turístico y una lógica mercantil para atraer a nuevas fuentes de dinero pero también para obtener otro tipo de legitimidad.Abstract: This article presents Maximon, a syncretic deity from Guatemala, in the context of protestant attacks on popular Catholicism. This hybrid deity, which is associated with catholic saints, Judas, and mayan god Mam, is invoked by different groups within the population (indigenous and mestizo). This deity has also become the symbol of hidden social protest movements, in particular when Maximon is linked to the image of corrupt politicians, large landowners or military officials. Nonetheless, in the present context of massive conversions from Catholicism to Pentecostalism, a growing religious sector, the rituals offered to Maximon tend to represent ancestral maya traditions. In addition, the growing international importance of these religions has led to an adoption of Maximon rituals to attract tourists, in order to generate new income, and to claim legitimacy.Résumé : L’article présente la figure de Maximon, divinité syncrétique du Guatemala, dans un contexte religieux où la religion catholique populaire est remise en cause par les Églises protestantes. Cette divinité hybride composée de saints catholiques, de Judas Iscariote ou encore du dieu Mam des mayas est l’objet d’appropriation de différents segments de la population (indiennes comme métisses). Elle devient aussi le symbole de contestations sociales masquées quand Maximon est associé à l’image d’hommes politiques corrompus, à de grands propriétaires terriens voire à des militaires. Aujourd’hui dans un contexte de conversions massives au pentecôtisme et face à l’importance accrue de ces Églises, le culte affirme représenter la coutume ancestrale maya. Par ailleurs, dans un contexte d’internationalisation et de concurrence des religions, ce culte dynamique s’est adapté et a été mis en scène pour attirer parallèlement touristes et nouvelles ressources économiques mais aussi pour obtenir une nouvelle forme de légitimité.
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Jeon, E. C., T. J. Je e K. H. Whang. "A Study on Design of High Luminance Hybrid LED Package and Ultra-fine Machining of Optical Pattern". Transactions of Materials Processing 19, n. 8 (1 dicembre 2010): 474–79. http://dx.doi.org/10.5228/kstp.2010.19.8.474.
Testo completoTesi sul tema "LED hybride"
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Wang, Shenming. "Design and synthesis of organic luminescent materials with a 2,2′-bipyrimidine scaffold for hybrid LED lighting". Electronic Thesis or Diss., Institut polytechnique de Paris, 2024. http://www.theses.fr/2024IPPAX016.
Testo completoAbstract (sommario):
Les matériaux luminescents organiques offrent de nombreux avantages par rapport à leurs homologues inorganiques. Grâce à une conception minutieuse, ils peuvent présenter une fluorescence efficace dans la plage visible, avec une couleur d'émission ajustable, ainsi qu'une forte absorption dans la région du proche-UV et du bleu. Cette caractéristique leur permet d'être utilisés dans la fabrication de films minces pour des dispositifs optoélectroniques légers. Leur grande solubilité dans les solvants organiques ouvre la voie à des techniques de traitement en solution, telles que le dépôt par centrifugation ou par couche mince. De plus, leur caractère exempt de métaux s'inscrit dans une perspective de développement durable. Dans ce contexte, les composés luminescents organiques représentent une alternative prometteuse aux phosphores inorganiques utilisés dans les LED blanches commerciales, offrant ainsi la possibilité d'améliorer la qualité de la lumière.Notre travail vise à concevoir et synthétiser des matériaux luminescents organiques hautement efficaces pour convertir la lumière proche ultraviolette ou bleue émise par les diodes électroluminescentes (LED) à base de semi-conducteurs inorganiques en lumière visible, idéalement en lumière blanche. Cette application est désignée sous le nom de LED hybrides. Les stratégies de conception moléculaire couramment utilisées incluent l'approche donneur-accepteur (D-A), qui permet d'ajuster la bande interdite pour régler la longueur d'onde d'absorption et la couleur d'émission, ainsi que l'émission induite par agrégation (AIE), qui prévient l'extinction significative de l'émission à l'état solide due à la formation d'agrégats.Dans le cadre de ce travail, nous avons conçu et synthétisé une série de molécules D-A, désignées de M1 à M7, en utilisant de nouveaux accepteurs dérivés de la 2,2′-bipyrimidine comme blocs de construction. Ces molécules ont été purifiées et soumises à des études photophysiques à la fois en solutions diluées et à l'état solide. Nos résultats ont montré une couleur d'émission ajustable, une fluorescence et une absorption fortes, ainsi qu'un taux de conversion élevé de la lumière proche-UV en lumière visible. Nous avons également évalué leur photostabilité afin d'estimer leur durée de vie. Enfin, nous avons réalisé des mélanges d'émetteurs différents pour générer de la lumière blancheOrganic luminescent materials possess a lot advantages over the inorganic analogues. By carefully designing, they can exhibit efficiency fluorescence in visible area with tunable emission color and strong absorption in near-UV and blue region. Due to this, they can be made in thin films for light-weight optoelectronic devices. They can be highly soluble in organic solvent which provide the possibility for the solution-processing techniques, such as spin-coating and slot-die coating. They are metal-free, which is desired for the sustainable development. In this case, the organic luminescent compound could be a promising alternative to the inorganic phosphor utilized in commercial white LEDs for the improvements of the light quality.In this work, we are aiming at designing and synthesizing greatly efficient organic luminescent materials for down-converting the near-UV or blue light from the light-emitting diodes (LEDs) based on inorganic semiconductors into visible light, ideally white light. Therefore, the target application is called hybrid LEDs. The frequently employed molecular design strategies include: (1) the donor-acceptor (D-A) approach, which can adjust the bandgap in order to tune the absorption wavelength and emission color; (2) aggregation-induced emission (AIE) is introduced for avoiding the significant quenching of the emission in solid state which is owing to the aggregates.Herein, we designed and synthesized a series of D-A molecules M1-M7 implementing new acceptors, 2,2′-bipyrimidine derivatives, as building block. They were purified and taken to the photophysical investigations in both diluted solutions and solid state. They showed tunable emission color, strong fluorescence and absorption, more importantly, high conversion rate from near -UV external source to visible light. We also inspected their photostabilities to estimate their lifespans. In the end, the blenders of different emitters are made for generating white light
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Djaballah, Adel. "Calcul par analyse intervalle de certificats de barrière pour les systèmes dynamiques hybrides". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS195/document.
Testo completoAbstract (sommario):
Cette thèse développe des outils permettant de prouver qu’un système dynamique est sûr. En supposant qu’une partie de l’espace d’état est dangereuse, un système dynamique est dit sûr lorsque son état n’atteint jamais cette partie dangereuse au cours du temps, quel que soit l’état initial appartenant à un ensemble d’états initiaux admissibles et quel que soit le niveau de perturbation restant dans un domaine admissible. Les outils proposés cherchent à établir des preuves de sûreté pour des systèmes décrits par des modèles dynamiques non-linéaires et des modèles dynamiques hybrides. Prouver qu’un système dynamique est sûr en calculant explicitement l’ensemble des trajectoires possibles du système lorsque le modèle dynamique est non-linéaire et perturbé reste une tâche très difficile. C’est pourquoi cette thèse aborde ce problème à l’aide de fonctions barrières paramétrées. Une barrière, lorsqu’elle existe, permet de partitionner l’espace d’état et d’isoler l’ensemble des trajectoires possibles de l’état du système de la partie dangereuse de l’espace d’état. La fonction paramétrique décrivant la barrière doit satisfaire un certain nombre de contraintes impliquant la dynamique du modèle, l’ensemble des états initiaux possibles, et l’ensemble dangereux. Ces contraintes ne sont pas convexes en général, ce qui complique la recherche de fonctions barrières satisfaisantes. Précédemment, seules des fonctions barrières polynomiales ont été considérées pour des modèles dynamiques polynomiaux. Cette thèse considère des systèmes dynamiques relativement généraux avec des barrières paramétriques quelconques. Les solutions présentées exploitent des outils de satisfaction de contraintes sur des domaines continus et des outils issus de l’analyse par intervalles. Dans un premier temps, cette thèse considère des systèmes dynamiques non-linéaires à temps continu. Le problème de conception d’une barrière paramétrique est formulé comme un problème de satisfaction des contraintes sur des domaines réels avec des variables quantifiées de manière existentielle et universelle. L’algorithme CSC-FPS a été adapté afin de résoudre le problème de synthèse de barrière. Cet algorithme combine une exploration de l’espace des paramètres de la barrière et une phase de vérification des propriétés de la barrière. A l’aide de contracteurs, il est possible de significativement accélérer la recherche de solutions. Dans un second temps, ces résultats sont étendus au cas de systèmes décrits par des modèles dynamiques hybrides. La propriété de sûreté doit être prouvée lors de l’évolution à temps continu du système dynamique, mais aussi pendant les transitions du système. Ceci nécessite l’introduction de contraintes supplémentaires qui lient les fonctions barrières associées à chaque mode à temps continu entre elles. Réaliser la synthèse de toutes les fonctions barrières pour les différents modes simultanément n’est envisageable que pour des systèmes de très petite dimension avec peu de modes. Une approche séquentielle a été proposée. Les contraintes liées aux transitions sont introduites progressivement entre les modes pour lesquels une barrière a déjà été obtenue. Lorsque certaines contraintes de transition ne sont pas satisfaites, une méthode de backtracking doit être mise en œuvre afin de synthétiser des barrières offrant une meilleure prise en compte des contraintes de transition non satisfaites. Ces approches ont été évaluées et comparées avec des techniques de l’état de l’art sur des systèmes décrits par des modèles à temps continu et des modèles hybridesThis thesis addresses the problem of proving the safety of systems described by non-linear dynamical models and hybrid dynamical models. A system is said to be safe if all trajectories of its state do not reach an unsafe region. Proving the safety of systems by explicitly computing all its trajectories when its dynamic is non-linear or when its behavior is described by an hybrid model with non-linear dynamics remains a challenging task. This thesis considers the barrier function approach to prove the safety of a system. A barrier function, when it exists, partitions the state space and isolates the trajectories of the system starting from any possible initial values of the state and the unsafe part of the state space. The set of constraints, which have to be satisfied by a barrier function are usually non-convex, rendering the search of satisfying barrier functions hard. Previously, only polynomial barrier functions were taken in consideration and for systems with polynomial dynamics. This thesis considers relatively general dynamical systems with generic non-linear barrier functions. The solutions presented are based on template barrier functions, constraint satisfaction problems, and interval analysis. The first part of the thesis focuses on non-linear dynamical systems. The barrier function design problem is formulated as a constraint satisfaction problem that can be solved using tools from interval analysis. This formulation allows one to prove the safety of a non-linear dynamical system by finding the parameters of a template barrier function such that all constraints are satisfied using the FPS-CSC algorithm, which has been adapted and supplemented with contractors to improve its efficiency. The second part of the thesis is dedicated to the design of barrier functions for systems described by hybrid dynamical models. Safety properties have to be proven during the continuous-time evolution of the system, but also during transitions. This leads to additional constraints that have to be satisfied by candidate barrier functions. Solving all the constraints simultaneously to find all the barrier functions is usually computationally intractable. In the proposed approach, the algorithm explores all the locations sequentially. Transition constraints are introduced progressively between the already explored locations. Backtracking to previous location is considered when transition constraints are not satisfied. The efficiency of the proposed approaches has been compared with state-of-the-art solutions
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Lin, Qiqiao. "Luminescent hybrid materials for LED lighting". Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLX036.
Testo completoAbstract (sommario):
Cette thèse visait à concevoir et à synthétiser des matériaux hybrides organiques-inorganiques à luminescence contrôlée et à les étudier en tant que luminophores pour l'éclairage à LED. L'objectif final était d'obtenir une source de lumière blanche. En effet, les LED blanches commerciales sont constituées d'un dispositif émetteur bleu recouvert d'un luminophore jaune. La combinaison de ces deux couleurs produit une lumière blanche. Cependant, cette lumière n'est pas de bonne qualité car il lui manque une composante rouge. Cela entraîne un mauvais rendu des couleurs des objets éclairés par ces sources de lumière. Dans notre travail, des polymères conjugués de différentes couleurs d'émission ont été obtenus avec succès. En particulier, plusieurs émetteurs de blanc ont pu être isolés.Dans cette thèse, non seulement les procédures de synthèse et les caractérisations chimiques sont présentées en détail, mais également les études des propriétés photophysiques des polymères, en solution et à l'état solide. Des études à l'état solide ont été effectuées sur les polymères et sur les polymères dispersés dans une matrice polymère. Ces études ont permis d'identifier les facteurs limitants quant aux utilisations pratiques de ces matériaux. Des solutions ont été proposées pour améliorer les performances d’émission et de stabilité des matériaux. De plus, ces travaux ont permis d'introduire la 2,2’-bipyrimidine comme nouvelle unité constitutrice pour le développement de polymères conjuguésThis thesis aimed at designing and synthesizing organic-inorganic hybrid materials with controlled luminescence and at investigating them as phosphors for LED lighting. The final goal was to obtain a white source of light. Indeed, commercial white LEDs are made up of a blue emitting device covered with a yellow phosphor. Combining these two colors yields white light. However, this light is not of good quality as it lacks some red component. This results in a bad rendering of the colors of objects illuminated by these sources of light. In our work, conjugated polymers with different emission colors have successfully been obtained. In particular, several single white emitters have been isolated.In this PhD thesis, not only the synthetic procedures and chemical characterizations are presented in detail, but also the studies of the photophysical properties of the polymers, either in solution or in the solid state. Solid state studies were performed on the bulk polymers and on the polymers dispersed into a polymeric matrix. These studies have lead to identify the limiting factors that could hamper the use of the materials. Solutions have been proposed to improve the materials performance and stability. Furthermore, 2,2’-bipyrimidine has been introduced as a new synthon for designing and developing conjugated polymers
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Hadj, Amor Hassen Jawhar. "Contribution au prototypage virtuel de systèmes mécatroniques basé sur une architecture distribuée HLA. Expérimentation sous les environnements OpenModelica-OpenMASK". Toulon, 2008. http://tel.archives-ouvertes.fr/tel-00437932/fr/.
Testo completoAbstract (sommario):
La mécatronique est l'intégration de différentes sciences et techniques de la mécanique, de l'automatique, de l'électronique et de l'informatique. L'évolution rapide des marchés concurrents exige la diminution du temps de développement d'un produit tout en augmentant la qualité et la performance du système. Il est donc nécessaire d'augmenter l'efficacité du processus de conception. Pour répondre à cette nécessité, en complément des outils d'analyse, la simulation, et spécialement le prototypage virtuel, est devenu l'une des clés technologiques. Il est difficile de trouver des outils de simulation capables d'analyser des systèmes pluridisciplinaires dépendants de différents domaines. Pourtant, un environnement qui permet une simulation intégrée multidisciplinaire de systèmes mécatroniques est nécessaire pour une évaluation fonctionnelle plus précise de la conception du produit et pour améliorer la qualité et l'efficacité de cette conception. La présente contribution décrit une méthode de conception et de simulation des systèmes mécatroniques. On identifie d'abord le modèle de comportement et le modèle géométrique 3D associé. Ensuite, le modèle de comportement est vu comme un système dynamique hybride formé de deux automates hybrides couplés (Partie Opérative, Partie Commande). Nous présentons ensuite les simulateurs OpenMASK, OpenModelica, le standard IEEE1516 HLA et les travaux reliés à cette architecture de simulation distribuée. Dans une démarche descendante, nous présentons ensuite notre approche et notre expérimentation pour intégrer les fonctionnalités de HLA dans ces simulateurs, pour distribuer les éléments de modélisation de systèmes mécatroniques de haut niveau et enfin pour compléter Modelica sur le formalisme des automates hybrides qui nous est indispensable. Nous proposons des extensions pour intégrer le temps réel en vue de simulations interactives. Nous appliquons enfin cette approche sur les simulateurs cités en utilisant le bus HLA CERTI sous un environnement Linux à partir d'un exemple représentatif d'un système mécatroniqueMechatronics is the integration of different sciences and techniques of mechanical engineering, automation, electonics and informatics. The rapid evolution of the market competitors requires the reduction of development time of a product while increasing the quality and performance. It is therefore necessary to increase the effectiveness of the design process. To meet this need, in addition to the tools of analysis, simulation and especially virtual prototyping has become a key technology. It is difficult to find simulation tools capable of analyzing multi-dependent systems of different areas. However, an environment that allows a simulation integrating multidisciplinary mechatronic systems is necessary. This article describes a method of design and simulation of mechatronic systems. It identifies the first model of behaviour and the associated 3D geometric model. Then, the model of behaviour is seen as a dynamic hybrid system of two coupled hybrid automata (Operative part, Control part). We then present simulators OpenMASK, Openmodelica, the IEEE1516 standard HLA and work related to the architecture of distributed simulation. In a top-down, then we present our approach and testing to integrate the features of HLA in these simulators, to distribute the high level modelling elements of mechatronic systems and finally to complement Modelica with the formalism of hybrid automata which is essential in this work. We offer extensions to integrate real-time for interactive simulations. Finally we apply this approach on simulators cited using the HLA CERTI bus in a Linux environment through a representative example of a mechatronic system
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Tran, Kelly. "Hybride associant polymère biosourcé et un système renforçant les propriétés de tenues au feu : analyse de la morphologie des mélanges et de leur structure pour l'optimisation des propriétés fonctionnelles". Electronic Thesis or Diss., Lyon, 2021. http://www.theses.fr/2021LYSES017.
Testo completoAbstract (sommario):
L’objectif de ces travaux de recherche est de développer un matériau hybride biopolymère/géopolymère ayant des bonnes propriétés de résistance et de réaction au feu, mis en œuvre par un procédé continu d’extrusion. Pour cela, il a été nécessaire de mener une étude rhéocinétique afin de mieux comprendre la réaction de géopolymérisation et ainsi d’éviter les risques de réticulation dans la machine. Le principe de superposition temps de réaction – température a été introduit afin de prédire à la fois le temps de gel chimique ainsi que les modules de la pâte de géopolymère au cours de la réaction. Le modèle en série parallèle de Takayanagi a également été utilisé afin de décrire l’évolution de la structure du réseau au cours de la formation du géopolymère. L’étude de différents moyens de mise en œuvre ont été abordés et a permis de mettre en évidence un procédé permettant de combiner à la fois la fabrication du matériau hybride thermoplastique à base d’amidon thermoplastique (TPS) et la génération in situ de géopolymère dans une extrudeuse bivis. Cette thèse a abouti au développement d’un nouveau matériau hybride présentant des propriétés de résistance au feu améliorées que ce soit au niveau du flux de chaleur dégagée ou du retardement de l’ignition du matériau. La présence de géopolymère au sein de la matrice de TPS permet l’obtention d’un résidu de calcination ayant une structure alvéolaire, expansée et cohésive pouvant jouer le rôle de barrière physique à la diffusion de la chaleurThe objective of this research is to develop a biopolymer / geopolymer hybrid material with good fire resistance and reaction properties, obtained by a continuous extrusion process. For, it was necessary to carry out a rheokinetic study in order to better understand the geopolymerization reaction and thus to avoid the risks of crosslinking in the twin screw extruder. The principle of reaction time - temperature superposition was developed in order to predict both the setting time as well as the moduli of the geopolymer paste during the reaction. The Takayanagi parallel series model was also used to describe the evolution of the network structure during geopolymer formation. This study highlights a process allowing to combine both the processing of the thermoplastic hybrid material based on thermoplastic starch (TPS) and the generation of geopolymer in situ of a twin-screw extruder. This thesis led to the development of a new hybrid material exhibiting improved fire resistance properties either in terms of the heat release rate or the retardation of the ignition of the material. The presence of geopolymer within the TPS matrix allows the formation of a calcination residue with an alveolar, expanded and cohesive structure that can act as a physical barrier to the heat diffusion
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Youssef, Abdul-Munhem. "Nouvelles technologies de protections contre les radiations et de contrôle thermique intégrées dans les circuits hybrides embarqués : application aux circuits préemplificateurs hybrides de l'expérience STAFF du projet CLUSTER de l'Agence spatiale européenne, ESA". Châtenay-Malabry, Ecole centrale de Paris, 1991. http://www.theses.fr/1991ECAP0223.
Testo completoAbstract (sommario):
L'intégration de circuits hybrides dans les équipements électroniques entraine des réductions importantes de poids et de volume, et de meilleures performances électriques. Leur emploi est particulièrement intéressant dans les applications spatiales. Les contraintes d'utilisation très spécifiques qui sont liées aux missions spatiales, dont les doses de radiations et lets variations thermiques, obligent à intégrer les protections nécessaires afin de ne pas détruire les composants électroniques. La présente thèse, qui est le fruit d'une coopération entre le centre de recherches en physique de l'environnement (CRPE) (laboratoire du CNRS et du CNET), le centre national d'études spatiales, et Alcatel-espace, a pour objet de développer et mettre au point de nouvelles techniques de protection contre les doses de radiation et de contrôle thermique, techniques intégrées à l'intérieur des circuits hybrides. Elles consistent à protéger in-situ les puces sensibles. Elles portent sur une protection et un contrôle individuels localisés, et intégrés sur le substrat du circuit hybride. Mises au point et validées dans les laboratoires d'Alcatel-espace (Toulouse), ces technologies sont utilisées pour la première fois sur les préamplificateurs hybrides de l'expérience STAFF de la mission CLUSTER de l'ASE (Agence spatiale européenne).
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Verrière, Jonas. "ZDES simulations of propulsive jets : physical analysis and influence of upstream turbulence". Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066499/document.
Testo completoAbstract (sommario):
Ce travail porte sur l’évaluation de la méthode ZDES pour la simulation de jets propulsifs. L’analyse se concentre sur le positionnement des cellules de chocs et le développement des couches de mélange d’une tuyère double-flux avec plug externe, typique des moteurs d’avions modernes. Les champs statistiques sont comparés aux résultats expérimentaux et discutés en termes de grandeurs moyennes, fluctuantes et dans le domaine fréquentiel. L’intérêt d’utiliser un schéma spatial peu dissipatif ainsi qu’une échelle de longueur sous-maille basée sur la vorticité locale est mis en évidence, notamment pour le dévelopement de la couche de mélange interne, et le mode 2 ("automatique") de la ZDES a démontré un comportement similaire au mode 1 ("manuel") dans les couches de mélange. Par ailleurs, la technique Random Flow Generation (RFG) mise en oeuvre afin de reproduire la turbulence amont existant au coeur des jets primaire et secondaire a permis d’accélérer la transition RANS-LES dans les deux couches de mélanges, plus conformément à l’expérience. La transition est d’autant plus rapide que le taux de turbulence est élevé et l’échelle de la turbulence injectée est petite. Le positionnement des cellules de choc est également amélioré, soulignant l’importance de prendre en compte la turbulence amont dans les simulations de jetsIn this thesis, the ZDES method is assessed for the simulation of propulsive jets. This work focuses on the shock-cell positioning and the mixing layer development of a dual-stream nozzle configuration with an external plug, typical of modern aircraft engines. Reynolds averaged data are discussed in terms of mean and fluctuating quantities as well as in the frequency domain and compared with experimental data. First, the advantage of using a low dissipative spatial scheme as well as a subgrid length scale based on the local vorticity is demonstrated, especially for the development of the core mixing layer. Besides, the "automatic" mode of ZDES (mode 2) is found to provide similar mixing layers as the user defined mode.Then, the use of the Random Flow Generation (RFG) technique at the inlet boundaries of the core and fan channels in order to reproduce the turbulence rate at the center of the nozzle ducts is shown to accelerate the RANS-to-LES transition in both external and internal mixing layers, which is in better agreement with the experimental results. The transition length is further reduced when the injected turbulent ratio is higher, but also when the injected turbulent length scale is smaller. Of interest, the shock-cell positioning in the fan jet is also improved using RFG, which emphasizes the importance of accounting for upstream turbulence for this type of simulations
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Pasco, Hélène. "When 19th century painters prepared organic-inorganic hybrid gels : physico-chemical study of « gumtions »". Electronic Thesis or Diss., Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2019SORUS296.pdf.
Testo completoAbstract (sommario):
Les médiums étaient utilisés par les peintres afin de modifier la texture et le séchage de leur peinture. Au 19ème siècle, des artistes britanniques ont développé un médium composé d’huile siccative, de résine mastic et d’acétate de plomb trihydraté : le « gumtion ». Ce matériau de type gel surpasse les additifs alors existants. Dans cette thèse, nous contribuons à la compréhension des processus chimiques impliqués dans la formation et le vieillissement des gumtions. Dans un premier temps, nous avons centré l’étude sur la résine mastic, car il s’agit d’un élément clé dans la préparation des gels. La fraction triterpénique de la résine a été identifiée et quantifiée par GC/MS. De plus, nous avons étudié par ellipsométrie les propriétés optiques de vernis sous forme de films minces, ainsi que leur comportement (gonflement) sous différentes atmosphères. Puis, en reproduisant des recettes historiques et afin d’approfondir la compréhension des interactions chimiques entre les composants du gel, nous avons développé des formulations simplifiées à base d’acide oléanolique (triterpène commercial) et d’un composé de plomb (acétate ou oxyde). L’utilisation de techniques d’analyses complémentaires aux échelles moléculaire (IR, MAS-RMN) et supramoléculaire (cryo-TEM, SAXS) indique dans un premier temps la formation d’un complexe de coordination entre le plomb et les fonctions acides des triterpénoïdes, qui s’arrangent en objets 2D expliquant le comportement viscoélastique du matériau. Après plusieurs mois de vieillissement, nous avons observé l’auto-organisation de nanoparticules cristallines en en lamelles, témoignant du caractère dynamique de ce matériau même avec gélificationMediums were used by painters in order to modify the texture and drying properties of their paint. During the 19th century, British artists developed a particular medium made of siccative oil, mastic resin and lead acetate trihydrate. The so-called “gumtions” form gel-like materials in a relatively short time, outperforming the existing paint media. This thesis contributes unveiling the chemical processes involved in the formation and ageing of gumtions. As a first step, we focused on mastic resin since it is a key component for the preparation of gumtion. The triterpenic fraction of the resin was identified and quantified using GC and GC/MS. Moreover, we took advantage of Spectroscopic Ellipsometry so as to study the optical properties of varnish thin films as well as their behaviour (swelling) under various atmospheres. Then, we reproduced historical recipes that helped us afterwards to define simplified formulations to deepen the understanding of the chemical interactions between the gel components, made of oleanolic acid (commercial triterpenoid) and a lead compound (acetate or oxide). They were investigated at dierent scales by spectroscopic (FTIR, MASNMR) and supramolecular analyses (Cryo-TEM, SAXS). The use of these complementary techniques gives an overview of the gel’s structure and formation: rapidly, a coordination complex is formed between lead and the carboxylic acid moieties of the triterpenoids, that organizeinto2Dobjectsleadingtothesolid-likebehaviorofthematerial. After few months ageing, we observed the self-assembly of crystalline nanoparticles into lamellar structures, witnessing the dynamic occurring in the material even after gelation.bly of crystalline nanoparticles into lamellar structures, witnessing the dynamic occurring in the material even after gelation
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Wang, Qirong. "Cristallochimie des phases AFm hybrides : interactions entre les hydrates cimentiers lamellaires et les adjuvants organiques". Thesis, Clermont-Ferrand 2, 2016. http://www.theses.fr/2016CLF22755/document.
Testo completoAbstract (sommario):
Dix molécules organiques modèles simulant les fonctions chimiques des superplastifiants utilisés dans la formulation des bétons ont été intercalées dans les hydrates cimentiers lamellaires conduisant à la formation de phases AFm hybrides. Les interfaces entre les deux sous-réseaux organiques et inorganiques de ces composés hybrides ont été étudiées afin de caractériser les interactions entre hydrates cimentiers et adjuvants organiques lors de la prise du béton. Les affinités de ces molécules vis-à-vis du feuillet minéral ont pu être comparées et il en ressort les deux séries suivantes : -PO32- > -SO3- > -CO2- pour les parties hydrophiles et C7-R > Φ-R > C5-R > C2-R pour les parties hydrophobes. L’interface organique-inorganique i.e. le mode d’accrochage et l’orientation de la molécule organique au sein de l’espace interlamellaire ont principalement été caractérisés par DRX sur poudre et spectroscopie infrarouge. Différents modes de connexion ont pu être identifiés par intercalation et par greffage. Les molécules organiques examinées sont ainsi orientées soit perpendiculairement, soit parallèlement aux feuillets associés à différents mode d’accroche. Différents taux d’hydratation de ces hydrants hybrides ont ensuite été identifiés et un travail de résolution structurale sur la phase insérant l’anion C6H5SO3- a permis de préciser l’organisation structurale de l’espace interlamellaire. Finalement, une étude sur l’intercalation de quelques superplastifiants commerciaux a mis en évidence un phénomène d’exfoliation de ces hydrates lamellaires. L’étude préalablement réalisée sur des molécules modèles permet alors de mieux comprendre les interactions se produisant au sein du milieu complexe que constitue un béton fraisTen organic molecules models simulating the chemical functions of superplasticizers used in concretes formulation were intercalated into lamellar cement hydrates to synthesize hybrid AFm phases. The interfaces between the organic and inorganic networks of these hybrid compounds have been studied to characterize the interactions between cementitious hydrates and organic additives in concrete. The affinities of these molecules toward the mineral layers have been compared and display the following tendencies : -PO32- > -SO3- > -CO2- for the hydrophilic parts and C7-R > Φ-R > C5-R > C2-R for the hydrophobic parts. The organic-inorganic interface (connection mode and orientation of the organic molecule) of the hybrid AFm phases was characterized by powder WRD and infrared spectroscopy. Organic molecules are oriented either perpendicular or parallel to the sheets resulting from different connection modes mainly intercalation and also grafting. The various hydration levels of these hybrids hydrates were then determined, and a structural resolution was attempted on AFm inserting C6H5SO3- anion allowing a description of its interlayer structure. Finally, a study on the intercalation of some commercial superplasticizers highlighted the exfoliation phenomenon for these lamellar hydrates.The present study on model molecules leads to a better understanding of the interactions occuring in complex fresh concrete environment
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Bellanger, Adrien. "Ordonnancement sur les machines à traitement par batches et contraintes de compatibilité". Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2009. http://tel.archives-ouvertes.fr/tel-00606383.
Testo completoAbstract (sommario):
Dans cette thèse, nous avons traité les problèmes d'ordonnancement d'ateliers de type flow- shop hybride à deux étages avec machines à traitement par batches sur le second étage et compatibilité entre les tâches. Les durées opératoires des tâches sont données par des intervalles, et les tâches sont dites compatibles si elles partagent une même durée d'exécution. Pour le problème de minimisation de la date de fin d'ordonnancement de ce type d'atelier, nous avons développé 6 heuristiques à performances garanties. D'après les expériences réalisées, ces heuristiques sont efficaces sur de grandes instances. Pour les petites instances, nous avons présenté deux méthodes exactes de type procédures par séparation évaluation qui permettent de résoudre des instances de 20 tâches. Nous avons également développé un schéma d'approximation polynomial (PTAS) utilisable lorsque les durées d'exécution sur le premier étage sont identiques. En complément de ces travaux, nous avons également étudié d'autres problèmes de minimisation de critères réguliers sur une machine à traitement par batches. Nous avons développé des algorithmes de programmation dynamiques pseudo-polynomiaux pour les problèmes de minimisation de la somme des dates de fin d'exécution et pour les problèmes avec dates de fin souhaitées. Afin de compléter ces résultats de complexité, nous avons montré la NP-complétude des problèmes avec dates de fin souhaitées.
Libri sul tema "LED hybride"
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Le, Chengrui. Design Techniques of Highly Integrated Hybrid-Switched-Capacitor-Resonant Power Converters for LED Lighting Applications. [New York, N.Y.?]: [publisher not identified], 2020.
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Saul, R. A. Analysis of Hybrid III lower leg instrumentation and an associated injury citerion. Washington, D.C.]: National Highway Traffic Safety Administration, 1992.
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O'Keefe, Linda. Hybrid Soundscapes. University of Edinburgh, 2024. http://dx.doi.org/10.2218/ed.9781836450306.
Testo completoAbstract (sommario):
Hybrid Soundscapes is a multi-component body of outputs investigating acoustic ecology. It is comprised of sound installation, an album, participatory community engagement activities and peer-reviewed publications.The output was the outcome of three years of practice-led research into the impact of renewable energy technology on rural and natural landscapes. O Keeffe investigated four sites where new types of renewable energies have had an impact on natural landscapes: the southern region of Iceland, the Northern Terra Alta region of Spain, Barrow-in-Furness in the UK and Beijing, China. The research also investigated graphic composition as a mode of mapping sensory, social and ecological sonic experiences over time. The research employed different methodologies including retreats in natural landscapes, participatory listening workshops with local communities and documentary research. Hybrid Soundscapes was commissioned by the curator Christine Eyene in 2016 (curator of the 2019 Moroccan Biennale) for a touring exhibition titled Sounds Like Her that would for the first time present established women artists who have expanded the field of sound art. For the exhibition, O Keeffe presented four large printed graphic scores/sound maps and an immersive audio composition for five speakers. The scores comprised photographic images and drawings of the sites in which O Keeffe conducted field research. The audio composition functioned both as a single immersive audio work and a spatialised site-specific performance. Hybrid Soundscapes I–IV was first presented in the exhibition Sounds Like Her at the New Art Exchange, Nottingham, 13 October 2017 – 3 January 2018. Subsequent exhibition presentations included: York Art Gallery, 12 July – 25 August 2019, and Gallery Oldham, 14 December 2019 – 7 March 2020.
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The Last Hybrid Bloodline Of Angels Lee Wilson. William and Keats Publishing, 2013.
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Elbasani, Arolda. International-Led Statebuilding and Local Resistance: Hybrid Institutional Reforms in Post-Conflict Kosovo. Taylor & Francis Group, 2020.
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Elbasani, Arolda. International-Led Statebuilding and Local Resistance: Hybrid Institutional Reforms in Post-Conflict Kosovo. Taylor & Francis Group, 2020.
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Elbasani, Arolda. International-Led Statebuilding and Local Resistance: Hybrid Institutional Reforms in Post-Conflict Kosovo. Taylor & Francis Group, 2020.
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Elbasani, Arolda. International-Led Statebuilding and Local Resistance: Hybrid Institutional Reforms in Post-Conflict Kosovo. Taylor & Francis Group, 2020.
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Jamieson, Kathleen Hall. Creating the Hybrid Field of Political Communication. A cura di Kate Kenski e Kathleen Hall Jamieson. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199793471.013.27.
Testo completoAbstract (sommario):
This chapter tracks the byways that led to the emergence of a cross-disciplinary cadre of scholars identified with the hybrid field of political communication. Concentrating on the period between the Columbia election studies of the 1940s and 1993, it telegraphs the influence of the disciplines of sociology, political science, psychology and communication on the emerging field, indicates how scholars such as Elihu Katz, Kurt and Gladys Lang, Murray Edelman, and Doris Graber seeded the intellectual ground from which the field would grow, catalogues the emergence of a concept of effects that includes such phenomena as learning, the construction of political meaning, and agenda setting, and features a study that isolated the role of communication in activating the variables from which forecasting models predict presidential election outcomes.
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Zulueta-Fülscher, Kimana, e Asanga Welikala. Les constitutions infra-étatiques dans les contextes fragiles et en situation de conflit : Document d'orientation no 15. International Institute for Democracy and Electoral Assistance (International IDEA, 2021. http://dx.doi.org/10.31752/idea.2021.108.
Testo completoAbstract (sommario):
Les constitutions infra-étatiques sont des instruments juridiques écrits qui limitent et structurent le pouvoir politique au niveau infra-étatique et qui possèdent une suprématie juridique par rapport aux autres normes légales infra-étatiques. Leurs objectifs premiers sont de définir le système de gouvernement de l’entité infra-étatique mais aussi, souvent, de codifier les droits des citoyens en son sein. Elles peuvent également oeuvrer à la délimitation de la communauté politique et de son identité au niveau infra-étatique. Les entités infra-étatiques se définissent, quant à elles, comme parties intégrantes d’un pays ou d’un État, avec un territoire clairement délimité. Ce document d’orientation analyse les constitutions infra-étatiques dans les contextes fragiles et en situation de conflit (que ce soit dans des États fédéraux, unitaires ou hybrides) qui ont été adoptées à l’issue de la guerre froide après 1991. L’échantillon utilisé pour cette étude comporte dix pays : l’Afrique du Sud, la Bosnie-Herzégovine, les Comores (Anjouan), l’Éthiopie, l’Indonésie (Aceh et Papouasie), la Papouasie‒Nouvelle-Guinée (PNG, Bougainville), la Russie (Tchétchénie et Daghestan), la Somalie, le Soudan et le Soudan du Sud.
Capitoli di libri sul tema "LED hybride"
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Konow-Lund, Maria, e Jenny Wiik. "How a COVID-19 Live Tracker Led to Innovation in Investigative Journalism". In Hybrid Investigative Journalism, 115–35. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-41939-3_8.
Testo completoAbstract (sommario):
AbstractThe practice of investigative journalism is constantly pushing the boundaries of what journalism can do and should be. While certain core values remain intact, professionals readily experiment with new methods, forms of collaboration and technological solutions. In times of crisis, this inherent innovative power can be further accelerated and amplified. In this chapter, we explore the intersection of crisis, innovation and journalistic boundaries, as progress in this field inevitably produces questions and negotiations concerning both boundaries and definitions. Research on the ways in which journalists adapt or innovate during (and due to) crises is scarce, but the COVID-19 pandemic offered a unique opportunity to fill this gap. In the midst of the pandemic, a team of Norwegian researchers managed to gain access to the ongoing implementation of an infection-related data tracker at the most-read online newspaper in Norway. Team members were able to explore how this new tool impacted journalistic autonomy, cross-disciplinary work, and the relationship between staff and management (Konow-Lund et al., 2022).
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Oh, Sun Jin. "Performance Evaluation of a LED-IT-Sensor Integrated Streetlight System in USN". In Convergence and Hybrid Information Technology, 680–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-32692-9_85.
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Song, Jizhong, e Leimeng Xu. "Metal Halide Perovskite-Based Phosphors and Their Applications in LEDs". In Hybrid Phosphor Materials, 3–49. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-90506-4_1.
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Werner, Mirjam D., e Sylke F. Jellema. "‘Becoming a co-operative?’: Emergent Identity and Governance Struggles in the Context of Institutional Ambiguity in a Citizen-Led Health-Care Cooperative". In Managing Hybrid Organizations, 243–65. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95486-8_12.
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Konow-Lund, Maria, Michelle Park e Saba Bebawi. "Hybrid Investigative Journalism During Times of Crisis". In Hybrid Investigative Journalism, 3–22. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-41939-3_1.
Testo completoAbstract (sommario):
AbstractIn pursuit of its continued focus on holding power to account—locally, nationally and globally—investigative journalism as a practice has actively incorporated various digital skills and capabilities. The embrace of digital journalism has led to collages of skillsets that have come together in new ways to complement one another or merge into something unprecedented. These processes of hybridisation are regularly discussed in relation to how journalism is undergoing riveting change; as a concept, hybridity challenges traditional notions of how journalism is being produced and by whom. Domingo (2016, p. 145), for example, points out that hybridisation is taking place within journalistic practices both overtly and covertly amongst a range of (new and traditional) actors, platforms and organisations. The hybrid combination of digital and traditional physical forms of journalistic collaboration has also given rise to new horizontal processes (Russel, 2016, p. 149).
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Konow-Lund, Maria, e Michelle Park. "Making Investigative Journalism in a Hybrid Manner". In Hybrid Investigative Journalism, 25–38. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-41939-3_2.
Testo completoAbstract (sommario):
AbstractIt is easy to forget that, historically, hybridity has always been a part of journalism (Hamilton, 2016). For example, ethnographer and sociologist Gaye Tuchman (1978) first engaged with the ‘hybrid’ context of the television newsroom in the 1970s, unpacking its use of sound, moving images, still images, and lighting in relation to the traditional newspaper newsroom, which she had studied for her 1969 dissertation research. That ten-year production study relied upon the direct observation of news workers, editors, and their workplaces and led her to the powerful conclusion that journalism was in fact socially constructed or ‘made’ (Tuchman, 1969). She would develop her thinking about the news across media in her book Making news: A study of the construction of reality in 1978. Her work remains a model of scholarly engagement with journalism and its various platforms and practices even today.
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Park, Michelle, e Maria Konow-Lund. "The Bureau Local: A Hybrid Network for Local Collaborative Investigative Journalism". In Hybrid Investigative Journalism, 57–70. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-41939-3_4.
Testo completoAbstract (sommario):
AbstractCollaborative journalistic investigations rose to new prominence with the Panama Papers (2016) and Paradise Papers (2017) projects, both of which involved enormous amounts of data shared amongst an international network of journalists who coordinated their analyses. Whereas many are familiar with these cross-national collaborations when they are led by the International Consortium of Investigative Journalists, for example, it is less widely recognised that similar processes have been undertaken among local communities and cities as well. As discussed in the introduction to Part 2, Chadwick (2017, p. 4) highlights the ‘hybrid media system’ wherein older (more traditional) norms and practices merge with newer ones, and vice versa. While existing global journalistic collaborations inspired the founding of the Bureau Local, its collaborators are somewhat different from those involved in larger efforts. Instead of relying upon journalists from traditional legacy media organisations for such cross-national collaborations (Carson, 2020; Reese, 2021), the Bureau Local engages both professional and amateur reporters from many walks of life for its diverse activities.
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Cheong, Niki. "Internet-led political journalism: Challenging hybrid regime resilience in Malaysia". In The Routledge Companion to Political Journalism, 121–30. London: Routledge, 2021. http://dx.doi.org/10.4324/9780429284571-11.
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Konow-Lund, Maria, e Saba Bebawi. "Global Investigative Collaboration". In Hybrid Investigative Journalism, 97–114. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-41939-3_7.
Testo completoAbstract (sommario):
AbstractIn this chapter, we focus on how investigative cross-border collaboration has arisen and developed in the digital era by drawing upon our relatively unprecedented access to several news workers at the Forbidden Stories organisation in Paris during its formative phase. This collaborative network grew out of the desire of a professional journalists’ collective to defend their freedom of speech following the Charlie Hebdo terror attack in 2015. Forbidden Stories seeks to protect and redistribute investigative projects where the journalists who initiated them are either imprisoned or endangered and does this by organising transnational and investigative collaborations in Europe and, more recently, in a broader Global North and Global South context. We conducted our interviews with informants at the organisation, as well as some of its networks, in 2018 and 2019. We were especially interested in the hybrid aspects of these global collaborations with respect to technology, culture-specific modes of communication, and professional practices and standards. Rather than perpetuating the fraught divide and binaries between ‘mainstream and alternative, digital and non- or pre-digital journalism’ (Witschge et al., 2016, p. 2), we studied the ways in which they mixed and combined various methods that led to the common goal of holding power to account around the world.
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Jakimovski, Bojan. "Joint Leg Walking and Hybrid Robot Demonstrators". In Biologically Inspired Approaches for Locomotion, Anomaly Detection and Reconfiguration for Walking Robots, 9–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22505-5_3.
Testo completoAtti di convegni sul tema "LED hybride"
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Chen, Lung-Chien. "Fabrication and photocurrent of lead-free MASnI3 perovskite photodetectors prepared on ITO glass substrates". In Organic, Hybrid, and Perovskite Photovoltaics XXV, a cura di Gang Li e Natalie Stingelin, 66. SPIE, 2024. http://dx.doi.org/10.1117/12.3029446.
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Ryu, Yungryel, Sungki Hong, Sung J. Son e Jong In Shim. "Hybrid LED and applications". In Oxide-based Materials and Devices XIII, a cura di Ferechteh H. Teherani e David J. Rogers. SPIE, 2022. http://dx.doi.org/10.1117/12.2626268.
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Moreno, Ivan. "Color tunable hybrid lamp: LED-incandescent and LED-fluorescent". In Sixth Symposium Optics in Industry, a cura di Julio C. Gutiérrez-Vega, Josué Dávila-Rodríguez e Carlos López-Mariscal. SPIE, 2007. http://dx.doi.org/10.1117/12.742582.
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Chandra, P. V. S., N. Bharathidasan e C. R. Jeevandoss. "PERFORMANCE EVALUATION OF LED LAMP UNDER PULSE CURRENT MODE OPERATION". In Joint IMEKO TC11 and TC24 Hybrid Conference. Budapest: IMEKO, 2023. http://dx.doi.org/10.21014/tc11-2022.10.
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Nadas, Jozsef, e Laszlo Balazs. "Characterization of Hybrid LED Panels". In 2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4). IEEE, 2018. http://dx.doi.org/10.1109/lumenv.2018.8521080.
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Jha, Aman, Manoj Kumar, Jitendra Jain e Indar Prakash Singhal. "Smart solar hybrid LED streetlight". In 2017 Recent Developments in Control, Automation & Power Engineering (RDCAPE). IEEE, 2017. http://dx.doi.org/10.1109/rdcape.2017.8358229.
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Balazs, Laszlo, e Jozsef Nadas. "Color Quality of Hybrid LED Systems". In 2018 VII. Lighting Conference of the Visegrad Countries (Lumen V4). IEEE, 2018. http://dx.doi.org/10.1109/lumenv.2018.8521037.
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Vivanco-Galván, Oscar, Yuliana Jiménez, Darwin Patricio Castillo Malla e Hernán Lucero. "Blue LED light enhances the growth of Cinchona officinalis L. cultured in vitro". In Organic and Hybrid Sensors and Bioelectronics XV, a cura di Ruth Shinar, Ioannis Kymissis e Emil J. List-Kratochvil. SPIE, 2022. http://dx.doi.org/10.1117/12.2633167.
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Sargent, Edward H. "Perovskite LEDs". In Organic and Hybrid Light Emitting Materials and Devices XXV, a cura di Tae-Woo Lee, Franky So e Chihaya Adachi. SPIE, 2021. http://dx.doi.org/10.1117/12.2597304.
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Herrnsdorf, Johannes, Benoit Guilhabert, Jonathan McKendry, Zheng Gong, David Massoubre, Yujie Chen, Shuailong Zhang et al. "Hybrid GaN/organic polymer photonic crystal LED". In 2011 IEEE Photonics Conference (IPC). IEEE, 2011. http://dx.doi.org/10.1109/pho.2011.6110591.
Testo completoRapporti di organizzazioni sul tema "LED hybride"
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García Victoria, Nieves, Kees Weerheim, Frank Kempkes, Johan Steenhuizen, Arend Vreugdenhil e Marco de Groot. High Output LED in hybride belichting : monitoring praktijkproef bij Alstroemeria. Bleiswijk: Stichting Wageningen Research, Wageningen Plant Research, Business unit Glastuinbouw, 2018. http://dx.doi.org/10.18174/457114.
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Béjaoui, Ali, Sylvie St-Onge, Ingrid Peignier e Felix Bellesteros Leivas. Les diverses facettes du travail hybride. Seconds résultats d’un projet longitudinal de recherche. CIRANO, ottobre 2023. http://dx.doi.org/10.54932/qymj5601.
Testo completoAbstract (sommario):
La pandémie de 2020 a forcé le travail à distance pour de nombreux travailleurs au Canada. Aujourd’hui, plusieurs d’entre eux continuent de travailler à distance, au moins en partie. Ce nouveau mode d’organisation « hybride » permet d’offrir aux employés une plus grande flexibilité. Quels sont les divers modes de travail hybrides adoptés par les employés ? Quels sont leurs déterminants, leurs incidences ainsi que leurs conditions de succès ? Une équipe du CIRANO mène une étude longitudinale novatrice auprès d’employé(e)s de plusieurs organisations afin d’offrir des données probantes pour aider les employeurs. Ce texte résume les principaux résultats de la première et de la seconde phase du projet menées au Québec à l’été 2022 et au printemps 2023. La troisième et dernière phase de la recherche aura lieu à l’hiver 2024.
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Tadmor, Yaakov, Zachary Lippman, David Jackson e Dani Zamir. three crops test for the ODO breeding method. United States Department of Agriculture, novembre 2013. http://dx.doi.org/10.32747/2013.7594397.bard.
Testo completoAbstract (sommario):
Hybrid vigor is the leading concept that rules crops breeding for almost a century. Yet, the exact mechanism that underlies heterosis is not clear. Over dominance interaction between alleles is one of the possible explanations. Our preliminary results indicated that severe developmental mutations at the heterozygous state have significant potential to improve plant performance. This led us to propose the ‘ODO breeding method’ that is based replacing a parental line of a successful hybrid with its mutated from to improve hybrid performance. Our BARD research challenged this method in three crop systems: maize, tomato and melon. In maize we could not detect any effect of mutant heterozigosity on yield or yield components when hybrids were tested however when we analyzed the effect of heterozigosity in mutant genes at B73 genetic background we could detect ODO in yield components using certain mutants. Our results indicate that the potential of utilizing the ODO Breeding Method for maize remains unclear. In tomato we overcame technical problems we faced in creating an EMS mutation library in indeterminate glasshouse tomatoes and now we have in our hands advanced material to study the putative ODO hybrids. We transferred some of the promising ODO mutations from M82 to indeterminate glasshouse tomatoes and putative ODO hybrids are ready to be evaluated this winter. In addition, we tested the effect of In melon we compared putative ‘ODO hybrids’ with their isogenic hybrids lacking the mutant allele and our results indicated a potential for the ODO breeding method to improve yield, fruit number per plant, and carotenoids content. Additional experiments are required to estimate better the expected success percentage of the ODO breeding method in melon so that it will become a recommended practice for improving hybrid performance. Based on our results we can't yet recommend the 'ODO breeding method' as a general tool to improve hybrid performance and more efforts are necessary to evaluate the percent of success of this method. The increased carotenoid content we found in association with CRTISO heterozygosity is promising and additional experiments are currently being performed to characterize this finding.
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Soer, Wouter. High-Power Warm-White Hybrid LED Package for Illumination. Office of Scientific and Technical Information (OSTI), settembre 2013. http://dx.doi.org/10.2172/1113828.
Testo completo
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Agbiboa, Daniel. Origines de la gouvernance hybride et de la mobilisa on des communautés armées en Afrique subsaharienne. RESOLVE Network, novembre 2020. http://dx.doi.org/10.37805/cbags.fr.2020.3.
Testo completoAbstract (sommario):
Ce rapport RESOLVE, l’un de trois, cherche à comprendre l’origine, la dynamique et les moteurs des groupes armés communautaires ou GAC (community-based armed groups ou CBAGs) en Afrique. En tant qu’étude exploratoire, ce rapport implique la collecte, l’organisation et la synthèse des informations disponibles sur les acteurs de la sécurité non étatiques et leurs relations avec les communautés locales et les agences officielles de l’État, comme les systèmes d’application de la loi et de justice. Le rapport s’appuie sur des ouvrages académiques qui explorent les relations entre l’État et la société civile, en cherchant à remettre en question les rendus simplistes de ceux-ci en tant qu’entités distinctes avec des frontières clairement définies. Le rapport est également alimenté par des entretiens avec des membres de la Force d’intervention civile conjointe ou FICC (Civilian Joint Task Force ou CJTF), une milice pro- gouvernementale qui aide à repousser la violente insurrection de Boko Haram dans le nord-est du Nigeria.
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Dippo, James L., Tim Erikson e Kris Hess. Fuelcell-Hybrid Mine loader (LHD). Office of Scientific and Technical Information (OSTI), luglio 2009. http://dx.doi.org/10.2172/990290.
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Menon, Suresh, e Franklin Genin. Hybrid LES of Detonations in Reacting Multi-Phase Mixtures. Fort Belvoir, VA: Defense Technical Information Center, febbraio 2009. http://dx.doi.org/10.21236/ada496402.
Testo completo
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Kemp-Benedict, Eric. AMES: A model for energy, economic and environmental assessment. Stockholm Environment Institute, settembre 2023. http://dx.doi.org/10.51414/sei2023.046.
Testo completoAbstract (sommario):
This paper introduces the Adaptable Macroeconomic Extension for Sustainability analysis (AMES). AMES is a multi-sector, demand-led, structuralist model designed to provide consistent economic drivers to the widely used Low Emissions Analysis Platform (LEAP). The focus is on low-emission development strategies in low- and middle-income countries. Together, LEAP and AMES form a hybrid energy-economy model that combines two approaches: bottom-up energy-systems analysis and top-down macroeconometric assessments. Because of its focus on low- and middle-income countries, AMES can simulate structural change. Moreover, unlike most macroeconomic models used for energy analysis, AMES exhibits hysteresis, in which, for example, an energy investment programme can lead to persistent, positive impacts on GDP and employment. An open-source tool hosted on GitHub, AMES is a flexible model designed to be adapted for specific needs and studies.
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Kumar, Vishal, Ananias Tombouldies, Paul Fischer e Misun Min. High-Order Hybrid RANS-LES Study of NACA0012 Wing Sections. Office of Scientific and Technical Information (OSTI), aprile 2024. http://dx.doi.org/10.2172/2404498.
Testo completo
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Gur, Amit, Edward Buckler, Joseph Burger, Yaakov Tadmor e Iftach Klapp. Characterization of genetic variation and yield heterosis in Cucumis melo. United States Department of Agriculture, gennaio 2016. http://dx.doi.org/10.32747/2016.7600047.bard.
Testo completoAbstract (sommario):
Project objectives: 1) Characterization of variation for yield heterosis in melon using Half-Diallele (HDA) design. 2) Development and implementation of image-based yield phenotyping in melon. 3) Characterization of genetic, epigenetic and transcriptional variation across 25 founder lines and selected hybrids. The epigentic part of this objective was modified during the course of the project: instead of characterization of chromatin structure in a single melon line through genome-wide mapping of nucleosomes using MNase-seq approach, we took advantage of rapid advancements in single-molecule sequencing and shifted the focus to Nanoporelong-read sequencing of all 25 founder lines. This analysis provides invaluable information on genome-wide structural variation across our diversity 4) Integrated analyses and development of prediction models Agricultural heterosis relates to hybrids that outperform their inbred parents for yield. First generation (F1) hybrids are produced in many crop species and it is estimated that heterosis increases yield by 15-30% globally. Melon (Cucumismelo) is an economically important species of The Cucurbitaceae family and is among the most important fleshy fruits for fresh consumption Worldwide. The major goal of this project was to explore the patterns and magnitude of yield heterosis in melon and link it to whole genome sequence variation. A core subset of 25 diverse lines was selected from the Newe-Yaar melon diversity panel for whole-genome re-sequencing (WGS) and test-crosses, to produce structured half-diallele design of 300 F1 hybrids (MelHDA25). Yield variation was measured in replicated yield trials at the whole-plant and at the rootstock levels (through a common-scion grafted experiments), across the F1s and parental lines. As part of this project we also developed an algorithmic pipeline for detection and yield estimation of melons from aerial-images, towards future implementation of such high throughput, cost-effective method for remote yield evaluation in open-field melons. We found extensive, highly heritable root-derived yield variation across the diallele population that was characterized by prominent best-parent heterosis (BPH), where hybrids rootstocks outperformed their parents by 38% and 56 % under optimal irrigation and drought- stress, respectively. Through integration of the genotypic data (~4,000,000 SNPs) and yield analyses we show that root-derived hybrids yield is independent of parental genetic distance. However, we mapped novel root-derived yield QTLs through genome-wide association (GWA) analysis and a multi-QTLs model explained more than 45% of the hybrids yield variation, providing a potential route for marker-assisted hybrid rootstock breeding. Four selected hybrid rootstocks are further studied under multiple scion varieties and their validated positive effect on yield performance is now leading to ongoing evaluation of their commercial potential. On the genomic level, this project resulted in 3 layers of data: 1) whole-genome short-read Illumina sequencing (30X) of the 25 founder lines provided us with 25 genome alignments and high-density melon HapMap that is already shown to be an effective resource for QTL annotation and candidate gene analysis in melon. 2) fast advancements in long-read single-molecule sequencing allowed us to shift focus towards this technology and generate ~50X Nanoporesequencing of the 25 founders which in combination with the short-read data now enable de novo assembly of the 25 genomes that will soon lead to construction of the first melon pan-genome. 3) Transcriptomic (3' RNA-Seq) analysis of several selected hybrids and their parents provide preliminary information on differentially expressed genes that can be further used to explain the root-derived yield variation. Taken together, this project expanded our view on yield heterosis in melon with novel specific insights on root-derived yield heterosis. To our knowledge, thus far this is the largest systematic genetic analysis of rootstock effects on yield heterosis in cucurbits or any other crop plant, and our results are now translated into potential breeding applications. The genomic resources that were developed as part of this project are putting melon in the forefront of genomic research and will continue to be useful tool for the cucurbits community in years to come.