Search results for "75"

Emprendimiento en personas con discapacidad. Un diagnóstico a través de la técnica de grupo nominal

2018

The aim of this work is to identify the dimensions and aspects that foster and / or restrict the entrepreneurial action of disabled people from a qualitative methodological perspective. The analysis was carried out by means of the nominal group technique. As a result of the analysis, this work proposes, through the work done with disabled people, a set of interventions that will reduce barriers and foster the entrepreneurship of such vulnerable group

Rompiendo el silencio. Infancias amenazadas

2018

Sanctissimi ... Pii ... Papae VI Allocutio habita in consistorio secreto die XIII Novembris M.DCC.LXXV. de pretiosa morte Hyacinthi Castanedae ... et…

1776

Sig. A-D2 Grav. amb símbols papals en la port. llatina i escut dels dominicans en la castellana. - Capitals grav. Port. en castellà al verso de la port. en llatí. - Text bilingüe a dues col., separades per banda: llatí i castellà. - Reclams. - Notes a peu de p.

Organización del trabajo y culturas laborales en los feminizados almacenes de la globalización agroalimentaria

2021

La globalización del sistema agroalimentario ha transformado la organización del trabajo en los campos y almacenes agrícolas. El almacén de manipulado y confección de frutas y hortalizas constituye un lugar clave para analizar las estrategias de acumulación de la agroindustria y sus efectos sobre la organización social del trabajo, en particular, la relación entre estas estrategias y los procesos de feminización y desvalorización del trabajo agrícola. Una desvalorización del trabajo femenino que es un elemento clave en la competitividad del sector agrícola y se apoya –y legitima– en una cultura del trabajo determinada. Este artículo examina la forma que adquiere esta relación y sus implicac…

Zvaigžņotā Debess: 2010, Rudens (209)

2010

Contents: G.Carevsky, I.Daube. Comet Bennett ; E.Fogels. Srinivasa Ramanujan ; M.Krastiņš. Smallest Planet of the Solar System: a Riddle of Centuries (1st part) ; A.Alksnis, Z.Alksne. Hot Jupiters and Their Retrograde Motion ; V.Karitāns. James Webb Space Telescope. What will it Be? ; K.Salmiņš. GFZ CHAMP Laser Tracking Award to SLR Station Riga ; J.Jansons. Vladimir Afanasjev, Officer of the Baikonur Cosmodrom in the 1970s (concluded) ; J.Limansky. International Year of Astronomy 2009 in Philately. Series EUROPA (2nd sequel) ; J.Dambītis. Centenary of Prominent Latvian Mathematician Ernests Fogels (1910-1985) ; J.Klētnieks. Sketches of History of Astronomy (concluded) ; M.Gills. Public Sun…

Te-As-Se glass microstructured optical fiber for the middle infrared

2009

International audience; We present the first fabrication, to the best of our knowledge, of chalcogenide microstructured optical fibers in Te-As-Se glass, their optical characterization, and numerical simulations in the middle infrared. In a first fiber, numerical simulations exhibit a single-mode behavior at 3.39 and 9.3 μm, in good agreement with experimental near-field captures at 9.3 μm. The second fiber is not monomode between 3.39 and 9.3 μm, but the fundamental losses are 9 dB/m at 3:39 μm and 6 dB/m at 9.3 μm. The experimental mode field diameters are compared to the theoretical ones with a good accordance.

Gas Transport in Mixed Matrix Membranes: Two Methods for Time Lag Determination

2020

The most widely used method to measure the transport properties of dense polymeric membranes is the time lag method in a constant volume/pressure increase instrument. Although simple and quick, this method provides only relatively superficial, averaged data of the permeability, diffusivity, and solubility of gas or vapor species in the membrane. The present manuscript discusses a more sophisticated computational method to determine the transport properties on the basis of a fit of the entire permeation curve, including the transient period. The traditional tangent method and the fitting procedure were compared for the transport of six light gases (H2, He, O2, N2, CH4, and CO2) and ethane an…

Mechanical and microstructural characterization of friction stir welded skin and stringer joints

2013

A microstructural and mechanical investigation on lap joints welded by friction stir welding and made out of a 7075-T6 stringer and a 2024-T4 skin is presented. In particular, the metallurgical and mechanical properties of joints have been studied at different tool feed rates (V = 35, 50, 100 mm/min) and constant rotation speed (R = 500 r/min). Temperature distributions have been monitored during the process. It is found that in the welded area, the recrystallized zone (nugget) has an average grain size of about 3 µm and exhibits coarsened MgZn2 particles on grain boundaries. The maximum values of microhardness in the welded skin increase with the process temperature, while they just sligh…

Low loss microstructured chalcogenide fibers for large non linear effects at 1995 nm

2010

International audience; Microstructured optical fibers (MOFs) are traditionally prepared using the stack and draw technique. In order to avoid the interfaces problems observed in chalcogenide glasses, we have developed a new casting method to prepare the chalcogenide preform. This method allows to reach optical losses around 0.4 dB/m at 1.55 µm and less than 0.05 dB/m in the mid IR. Various As(38)Se(62) chalcogenide microstructured fibers have been prepared in order to combine large non linear index of these glasses with the mode control offered by MOF structures. Small core fibers have been drawn to enhance the non linearities. In one of these, three Stokes order have been generated by Ram…

Effects of pulse current mode on plasma electrolytic oxidation of 7075 Al in Na2WO4 containing solution: From unipolar to soft-sparking regime

2018

Abstract Plasma electrolytic oxidation coatings were produced on 7075 Al alloy in a silicate based solution containing sodium tungstate using unipolar, usual bipolar and soft-sparking bipolar pulsed current regimes. X-ray diffraction proved that the coatings contain gamma alumina and metallic tungsten. EDS results showed that the tungsten content decreases with increasing the negative half cycle. Scanning electron microscopy showed that the pancake and volcano-like were dominant morphologies for the coatings produced by the unipolar and bipolar current regimes, respectively. Under unipolar current regime, a band of large pores is observed at the metal/coating interface, while they became di…