371 research outputs found
Isis prosopographiée : Fabio Mora, Prosopografia isiaca. I. Corpus prosopographicum religionis isiacae. II. Prosopografia storica e statistica del culto isiaco.
No full textDunand Françoise. Isis prosopographiée : Fabio Mora, Prosopografia isiaca. I. Corpus prosopographicum religionis isiacae. II. Prosopografia storica e statistica del culto isiaco.. In: Dialogues d'histoire ancienne, vol. 18, n°2, 1992. pp. 374-375
Effect of Processed Calcite Particles on Apricot Cationic Nutrition and Fruit Quality.
No full textWe reported the preliminary results on the effects of processed calcite
particles (PCP), applied at stage II and III of fruit development, on leaf cationic
nutrition and some physical and chemical characteristics of apricot fruits (Prunus
armeniaca L.). Approximately 30, 40, 50 days after bloom, 20 trees trained to vase
were randomly chosen in a 10-year old orchard, located in the Middle Rhône Valley
of France, sprayed with 1.5 kg/ha suspended in 100 L of water of PCP and compared
with unsprayed trees. Fruit weight and diameter were measured from fruit set
(April 18, 2007) to 3 days before harvest (May 16, 2007). Potassium, calcium and
magnesium were determined by spectrochemical analysis by atomic absorption and
emission in accordance with the IAOPN protocols on leaves and fruit sampled from
1 week before treatment, 1 and 3 weeks after application. Fruit harvested at the last
picking were also analyzed for total soluble solids, titrable acidity, pH of the fruit
juice. A sample of 20 fruits was stored in a cold room and daily observed for postharvest
physiological disorders or pathogens cropped out.
The application of PCP had no significant effect on apricot fruit growth,
assessed as fruit diameter. However, the results obtained show that treated plants
have nitrogen and cationic contents, in both leaves and fruits, closer to the standard
reference levels of this region compared to untreated plants. Apricot fruits from PCP
treatment showed higher total soluble solids and lower titratable acidity. Moreover,
treated fruits showed a lower susceptibility to post-harvest physiological disorder or
pathogen attacks
Creating accessible interactive OER with H5P for inclusive language education
No full textThe contents of this course/microcredit were developed under grant DPPF_2223_034_York_FSL Projects awarded from the Province of Ontario, Ministry of Colleges and Universities.This course/microcredit is composed of three modules: Module 1, What are OER and Why are They Important?, which explores the significance of OER and free licenses; Module 2, Creating Interactive and Accessible OER, which focuses on developing engaging and inclusive OER; and Module 3, How to Measure the Impact of Your Interactive and Accessible OER in Your Teaching Environment, which examines ways to assess educators’ effectiveness in teaching.
The goal of this course/microcredit is to help you use OER, repurpose it and create interactive content with H5P.
The contents of this course/microcredit were developed under grant DPPF_2223_034_York_FSL Projects awarded from the Province of Ontario, Ministry of Colleges and Universities.
Please note that the views expressed in the publication are the views of the Recipient of the award ad co-author of the course and do not necessarily reflect those of the Province
Manufacturing of Composites by Pressure Infiltration, Structure and Mechanical Properties
No full textThis paper presents the possibility of composite block production by using pressure
infiltration technology. This method uses the pressure of an inert gas (usually argon or
nitrogen) to force the melted matrix material to infiltrate the reinforcing elements. Two types
of materials were considered: metal matrix syntactic foam and carbon fibre reinforced metal
matrix composite. Physical and mechanical investigations – such as optical microscopy,
scanning electron microscopy (SEM), X-ray diffractography (XRD), tensile and upsetting
tests (considering aspect ratio) – were performed. The results of measurements are
summarized briefly here. Microscopic investigations showed almost perfect infiltration. XRD
measurements and tensile tests revealed negative effect of an intermetallic phase (Al(4)C(3)) on
ultimate tensile strength (UTS). Syntactic foams showed plateau region in their upsetting
diagrams. The effect of aspect ratio was also investigated. Specimens with higher aspect ratios
showed higher peak stress and higher modulus of elasticity. In the case of carbon fibre
reinforced metal matrix composites Al(4)C(3) ensured high compressive fracture strength
Experimental Investigation into Laser Welding of Aluminium Foam Filled Steel Tubes
No full textLaser welding appears to be the most suitable technology for joining metallic foams. Spatially limited energy input, together with high energy density, determine a small molten material volume and a rapid solidification, which prevents the collapse of the cellular structure and the drainage phenomena. It has indeed already been shown that laser welding is a useful technique for joining metal foam panels with conventional or foamable filler. The welding techniques were also widely applied and studied for the Aluminum Foam Sandwich (AFS).
Composite materials obtained by filling with metallic foam hollow profiles are nowadays available. Reliable welding processes have to be carried out in order to realize complex lightweight structures.
The present paper investigates the butt-joint laser welding of a composite material made of steel tubes filled with aluminum foam core. Two pieces of a metal foam filled steel tube were prepared by chamfering the edge and foamable filler was then inserted between them. The process was divided in two parts. As a first phase of the method, the joining of the tubes was obtained by tuning the laser parameters in order to weld the whole tube thickness without damaging the metal foam. Finally, the laser beam was used in order to obtain both a sort of heat treatment in the tubes material and a temperature gradient inside the aluminum foam core. In this second stage of the laser processing, the beam parameters were tuned in order to achieve the foaming temperature inside the tubes.
The hollow steel profiles were filled up with aluminum powder precursors, which were produced by cold uniaxial compaction according to the powder metallurgical route. They were then foamed in a furnace.
A Laser machining center with 3 kW CW FAF CO2 laser source and five CNC axes was used.
This study is a preliminary step in order to verify the reliability of the method, and further investigations will be necessary with the aim of optimizing the process. The present investigation was limited to laser beam power and process speed. At the present stage the results are very encouraging and a prototype has therefore been constructed
Mille et une nuits Français Extraits
No full texttrad. par J.C. MardrusJustification du tirage: - 20 ex. numérotés et signésLes planches ont été coloriées dans les ateliers de laquage de Jean Dunand d'après les originaux de F.-L. Schmie
Bible
No full texttrad. de Ernest RenanVol. 1: Le cantique des cantiques. Vol. 2: Suite en couleurs sur papier vélin de toutes les ill. excepté le bandeau de couverture et le faux-titre. Suite en noir, sur même papier, identique à la précédente dans sa compositionJustification du tirage : - 110 ex., les 6 premiers étant exemplaires de collaborateurs et comportant une double suite des gravure
Compressive behaviour of metal matrix syntactic foams
No full textThe compressive behaviour of three different metal matrix syntactic foams (MMSFs) were investigated. The results showed that the engineering factors as the size of the used hollow spheres, the aspect ratio (height / diameter ratio) of the specimens and the temperature of the compression tests have significant effects on the compressive strength and properties. The smaller microballoons with thinner wall ensured higher compressive strength due to their more flawless microstructure and better mechanical stability. The higher aspect ratio of the specimens resulted in worse compressive characteristics (lower strength, lower specific energy consuming capacity). The elevated temperature tests revealed ~30% drop in the compressive strength. However, the strength remained high enough for structural applications; therefore MMSFs are good choices for light structural parts working at elevated or room temperature. The proper size selection of the reinforcing hollow spheres ensures potential for tailoring the compressive characteristics of MMSFs
Le livre de la jungle
No full textRudyard Kipling ; trad. de l'anglais par Louis Fabulet et Robert d'Humières ; [ill. en couleur de Paul Jouve en collab avec François-Louis Schmied]Justification du tirage: - 125 ex
Alimentación y ambiente en la escuela primaria
No full textEl objetivo del estudio es explorar un enfoque didáctico específico que aporte un nuevo diseño para la enseñanza y aprendizaje de contenidos como la alimentación, nutrición y salud y ambiente, vinculados con las consecuencias ambientales que se generan durante la etapa de producción. En la carrera Licenciatura en Enseñanza de las Ciencias Naturales en el Nivel Primario, desde la materia Alimentación y Ambiente se propone articular contenidos de las Ciencias Naturales con los conceptos mencionados anteriormente, a partir de orientaciones didácticas priorizadas para la enseñanza en el abordaje del nivel primario (Perrenoud, P. 2001). En este contexto, se aplica una secuencia didáctica que aborda el problema de las consecuencias ambientales de la producción de alimentos y su posterior consumo. En los últimos años del s. XX resurgió la inquietud de un posible desequilibrio entre el crecimiento demográfico y la disponibilidad de alimentos. ¿La humanidad encontrará de qué alimentarse en situaciones climáticas quizá más adversas a las que está expuesta actualmente? Es por lo anterior que cobra relevancia estudiar la relación entre los cambios ambientales y su efecto sobre la alimentación. Un primer punto a considerar con respecto al ambiente es sin duda el cambio climático (Housni, F. E., Cervantes, V. G. A., del Toro, H. B., & Michel, M. L, 2016). Un segundo punto a considerar es la puja distributiva, en este caso de las fuentes de alimentos, donde los países productores desempeñan roles diversos que afectan dicha distribución. Un tercer ítem, entre muchos posibles, es el geográfico. Las llanuras que existen en el planeta Tierra son finitas, por lo que su capacidad productiva tiene un límite que, merced a la biotecnología, se ha superado para finalmente encontrar un nuevo techo productivo. Esta situación es el factor limitante de la variable demográfica. Consideramos apropiado el uso de la metodología de la Investigación Basada en Diseño (IBD) o “design-based research". Esta metodología no se limita a la elaboración y prueba de un diseño o intervención particular, sino también a la concreción de modelos teóricos "ya sea para precisar, extender, convalidar o modificar teoría existente o para generar nueva teoría" (Reigeluth y Frick, 1999 en Rinaudo, M.C & Donolo, D., 2010). Los primeros análisis de las producciones de los colegas cursantes arrojan como resultados que la secuencia didáctica propuesta permite una integración parcial entre los modelos didácticos específicos propuestos y los contenidos disciplinares enfocados desde esta nueva perspectiva de la relación entre Alimentación y Ambiente. Se visualizan, en esta primera aproximación a los materiales, dificultades para “romper" con la tradición de un enfoque biologicista del problema.Fil: Pedrol, Hector . Universidad Pedagógica Nacional.Fil: Dunand, Eduardo . Universidad Pedagógica Nacional
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