Search results for "Principi"
showing 10 items of 580 documents
Orientation and Crystallinity Measurements in Film Casting Products
2003
Film casting experiments were carried out with iPP under processing conditions causing the crystallization process to occur under orienting flow. Draw ratio and cooling rates were changed by varying mass flow rates and die thickness. The effect of processing conditions on film crystallinity was investigated by combining WAXS and FT-IR transmission methods, while orientation of both phases was measured by IR dichroism (according to Fraser's method) and successfully compared to birefringence measurements on final films. Crystallinity appears to be almost insensitive to draw ratio and cooling rate. Moreover the crystallinity profile turned out to be also constant along the transverse film dire…
Improvement of membrane performances to enhance the yield of vanillin in a pervaporation reactor.
2014
In membrane reactors, the interaction of reaction and membrane separation can be exploited to achieve a “process intensification”, a key objective of sustainable development. In the present work, the properties that the membrane must have to obtain this result in a pervaporation reactor are analyzed and discussed. Then, the methods to enhance these properties are investigated for the photocatalytic synthesis of vanillin, which represents a case where the recovery from the reactor of vanillin by means of pervaporation while it is produced allows a substantial improvement of the yield, since its further oxidation is thus prevented. To this end, the phenomena that control the permeation of bot…
Spēles dizaina principu un spēles elementu izmantošana pašvadītas mācīšanās prasmju pilnveidei fizikā vidusskolā
2022
Spēles dizaina principu un spēles elementu izmantošana pašvadītas mācīšanās prasmju pilnveidei fizikā vidusskolā. Marta Britāla, darba vadītāja doc. Dr.phys. Inese Dudareva. Bakalaura darbs. 70 lpp., 17 literatūras avoti, 6 pielikumi, 5 tabulas, 17 attēli. Latviešu valodā. Darba mērķis bija noskaidrot, kā iespējams izmantot spēles elementus un principus vidusskolas kursa “Fizika I” mācību procesā skolēnu pašvadītas mācīšanās prasmju pilnveidei. Darbā tika izstrādāti un aprobēti 5 temati vidusskolas kursā “Fizika I”, izmantojot dažādus spēles dizaina elementus un spēles principus mācību procesā. Aptaujās tika noskaidrots ekspertu un skolēnu viedoklis par izstrādāto mācību procesu, tika anali…
Investigation of the Cooling of Hot Walls by Liquid Water Sprays
1999
An experimental study was conducted for the heat transfer from hot walls to liquid water sprays. Four full cone, swirl spray nozzles were used at different upstream pressures, giving mass fluxes impinging on the wall, G, from 8 to 80 kg m(-2) s(-1), mean droplet velocities, U, from 13 to 28 m s(-1) and mean droplet diameters, D, from 0.4 to 2.2 mm. A target consisting of two slabs of beryllium-copper alloy, each 4 x 5 cm in size and 1.1 mm thick, was electrically heated to about 300 degrees C and then rapidly and symmetrically cooled by water sprays issuing from two identical nozzles. The midplane temperature was measured by a fast response, thin-foil thermocouple and the experimental data …
LA GOVERNANCE ECONOMICA DELL’U.E.: I VINCOLI COMUNITARI GRAVANTI SULLA DETERMINAZIONE DEI PRINCIPI DI COORDINAMENTO DELLA FINANZA PUBBLICA E SULLA AR…
2014
The purpose of this thesis is to study the European Union Economic governance system and, in particular, the analysis of the constraints imposed - by that system – on national budgetary policies. It seems particularly important, in fact, the interference between the (internal) process reform of the regulatory platform in economic and financial matters and budget - from the l. 42 and 196/2009 and with the subsequent implementing decrees of the so-called "Fiscal Federalism" - and the respect for the applicable European stability, understood as a premise (formal and substantial) to contribute to the "European Common Market" and codified also in the rules that govern the functioning of the Econ…
Educación diferenciada por razón de sexo en España: Reflexiones sobre los derechos y libertades educativas desde la perspectiva constitucional y de l…
2021
Gender-separate education, understood as a pedagogical model that provides separate schooling for boys and girls, has been subject to legal and public scrutiny for the past thirty years. Nonetheless, it has not been until 2018 that this educational option was put into the spotlight, especially regarding its constitutionality and compatibility with arts. 1.1, 9.2 and 14 of the Spanish Constitution, which constitute a manifestation of the principles of equality and non-discrimination, while at the same time trying to balance it with art. 27 of said constitutional text, with respect to the right to education and freedom to choose and create educational centers. Against this backdrop, the prese…
Selective photooxidation of ortho-substituted benzyl alcohols and the catalytic role of ortho-methoxybenzaldehyde
2016
It has been recently reported by Palmisano et al. (2015) [1] that the oxidation of 2-methoxybenzyl alcohol (2-MBA) to 2-methoxybenzaldehyde (2-MBAD) proceeds in water under near-UV light with an unexpected catalytic effect of 2-MBAD. In order to investigate the catalytic role of aldehyde in photolytic oxidation of ortho-substituted benzyl alcohols (OSBAs), reactivity runs were carried out with 2-methylbenzyl alcohol (2-MeBA), 2-nitrobenzyl alcohol (2-NBA), 2-hydroxybenzyl alcohol (2-HBA) and 2-chlorobenzyl alcohol (2-CIBA) in the absence and in the presence of their corresponding aldehyde. None of those alcohols showed a measurable oxidation rate even in the presence of their aldehydes but …
Fraga y la memoria democrática
2007
Los principios generales del derecho en la interpretación. (Una aproximación desde J. Bms. Vallet de Goytisolo)
2011
RESUMENEl artículo comienza haciendo mención al papel de la interpretación en el campo del Derecho así como su alcance en esta área. A continuación, se analiza el concepto de principio general del Derecho. Una vez centradas estas cuestiones, el artículo continúa con una panorámica general de la visión de Vallet de Goytisolo en el tema que se plantea, haciendo una pequeña referencia a la particularidad de la aplicación de la analogía iuris en la proyección de los principios generales del Derecho. La exposición finaliza con unas notas a modo de conclusiones ABSTRACT The article begins by explaining the role and scope of interpretation in Law. Next, it explores the concept of General Principle…
Formazione alla generatività, nella vita coniugale e nella relazione genitoriale. Riflessioni pedagogiche e orientamenti educativi
2014
L’autore tiene presente l’ultimo Rapporto CISF 2001 sulla famiglia in Italia, dedicato alle relazioni di coppia. L’attenzione, in particolare, è rivolta ad un fenomeno emergente, quello delle coppie che scelgono di restare childfree. Viene condotta una riflessione di antropologia pedagogica secondo lo stile fenomenologico, intesa a evidenziare le intenzionalità strutturali della dinamica di una coppia, quella amorosa, quella oblativa e quella sponsale. Qualsiasi scelta fatta dai partner, la convivenza, il matrimonio con rito civile o lo sposalizio con rito religioso, è segnata da queste intenzionalità originarie e dalla loro tensione intimamente generativa. Su questa base, l’autore definisc…