Search results for "material"
showing 10 items of 32550 documents
Atbalsta pasākumi logopēda darbībā otrās klases skolēniem ar mācīšanās traucējumiem
2019
Maģistra darba nosaukums: “Atbalsta pasākumi logopēda darbībā otrās klases skolēniem ar mācīšanās traucējumiem” Darba autore: Dace Riekstiņa Darba vadītāja: Ilze Vilka Darba saturs: Maģistra darbs sastāv no 166 lappusēm, 49 attēliem un 23 pielikumiem. Pētījuma mērķis: Teorētiski izpētīt un empīriski pārbaudīt metodiskā materiāla “Tematiskais plāns VSNA mazināšanai otrajai klasei” izmantošanas lietderīgums sākumskolas vecuma skolēniem ar VSNA Pētījuma jautājums: Vai skolēniem veiksmīgāk uzlabosies valodas sistēmas attīstība, ja koriģējoši attīstošā darbībā tiks izmantots metodiskais materiāls “Tematiskais plāns ar uzdevumiem”? Pētījuma teorētiskajā daļā maģistra darba autore pētījusi un anal…
Materials docents de Dret Romà: Temes. Diapositves
2022
Materials docents: Ppt. Teaching Materials: Ppt.
Performance of Lead-Acid Batteries with Nanostructured Electrodes at Different Temperature
2018
In this work we present innovative lead-acid batteries with nanostructured electrodes, which are cycled in a wide range of temperatures typically of lead-acid commercial batteries (EN 61427-1: 2013). In comparison to parameters usually used to commercial batteries, much more stressful conditions in terms of cut-off, charge/discharge rate and discharge were imposed.
High-Performance Lead-Acid Batteries Enabled by Pb and PbO2 Nanostructured Electrodes: Effect of Operating Temperature
2021
Lead-acid batteries are now widely used for energy storage, as result of an established and reliable technology. In the last decade, several studies have been carried out to improve the performance of this type of batteries, with the main objective to replace the conventional plates with innovative electrodes with improved stability, increased capacity and a larger active surface. Such studies ultimately aim to improve the kinetics of electrochemical conversion reactions at the electrode-solution interface and to guarantee a good electrical continuity during the repeated charge/discharge cycles. To achieve these objectives, our contribution focuses on the employment of nanostructured electr…
Thermo-Mechanical Behaviour of Flax-Fibre Reinforced Epoxy Laminates for Industrial Applications
2015
The present work describes the experimental mechanical characterisation of a natural flax fibre reinforced epoxy polymer composite. A commercial plain woven quasi-unidirectional flax fabric with spun-twisted yarns is employed in particular, as well as unidirectional composite panels manufactured with three techniques: hand-lay-up, vacuum bagging and resin infusion. The stiffness and strength behaviours are investigated under both monotonic and low-cycle fatigue loadings. The analysed material has, in particular, shown a typical bilinear behaviour under pure traction, with a knee yield point occurring at a rather low stress value, after which the material tensile stiffness is significantly r…
Effect of NaOH Treatment on Properties of Phoenix Sp. Fiber
2016
The aim of this paper is to investigate the effect of an alkali treatment on physical, chemical, mechanical, and morphological properties of Phoenix Sp. fibers. The use of natural fibers as reinforcement in polymer composites requires a deep investigation to understand their behavior and which treatment is more appropriate to improve the quality of the untreated material. For this reason, fibers were extracted from the petioles of the Phoenix Sp. plant and they were treated with NaOH solution in different weight concentrations (5%, 10%, and 15%). The mechanical behavior was investigated through tensile test on single fiber at different gauge length (20 mm, 30 mm, 40 mm, 50 mm, and 60 mm). C…
Effect of Core–Shell Rubber Nanoparticles on the Mechanical Properties of Epoxy and Epoxy-Based CFRP
2022
This research was funded by M-Era.Net project MERF “Matrix for carbon reinforced epoxy laminates with reduced flammability” grant No. 1.1.1.5/ERANET/20/04 from the Latvian State Education Development Agency and M-Era.Net project “EPIC—European Partnership for Improved Composites“ funded by grant No. TH06020001. A.S., K.S. and A.Z. are grateful to funding received from the European Union Horizon 2020 Framework program H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART2.
Effect of oil lamination between plasticized starch layers on film properties
2016
International audience; To reduce the hygroscopic character of biodegradable starch-based films, rapeseed oil was incorporated by lamination (starch-oil-starch 3-layers technique). The lipid lamination followed by starch solution casting step induced an emulsion type structure of dried films. Composite films are more opalescent and glossier than fatty free starch films. For all the films, structure is heterogeneous in the cross-section only. Adding fat induced a twice decrease of the tensile strength. Thermal gravimetry analysis did not show differences between films with and without oil. Lipid reduced the moisture absorption particularly at higher RH as well as the surface swelling index, …
Lògica materialista de Galvano della Volpe [Pròleg]
2004
Enfront del vell marxisme antropocèntric, i al capdavall escatològic, que circulava per les Facultats del país a principi de la dècada dels seixanta, i del qual es nodrien tants estudiants d'aleshores, guanyen terreny aquests darrers anys uns altres corrents marxistes, no tan recents com hom podria pensar, i que marxen per altres dreceres: a la preocupació humanista oposen la direcció epistemològica de llurs reflexions.
Historia del pensamiento político moderno (09 Marxismo)
2010
1.- Manifiesto del Partido Comunista. Un fantasma recorre Europa: el fantasma del comunismo. 2.- El socialismo científico. 3.- Materialismo histórico. La teoría de la revolución en Marx. La dialéctica hegeliana. Determinismo. &&&&& Historia del Pensamiento Político Moderno tiene como objetivo ofrecer una visión de aspectos centrales del pensamiento político moderno, del siglo XVI al XX. Los textos de los autores escogidos constituyen el punto de apoyo fundamental en el desarrollo del programa, por lo que los estudiantes deben hacer una lectura previa al tratamiento de los temas indicados para cada sesión.