Search results for "Stre"

Kuudesluokkalaisten nuorten temperamentin, akateemisen kimmoisuuden ja koulustressin väliset yhteydet

2016

Tässä tutkimuksessa tarkasteltiin kuudesluokkalaisten nuorten temperamentin, akateemisen kimmoisuuden ja koulustressin välisiä yhteyksiä lukuvuoden aikana. Tutkimus on osa TIKAPUU - Alakoulusta yläkouluun -tutkimushanketta, johon osallistuu noin 800 keskisuomalaista nuorta. Tutkimuksessa selvitettiin, vaikuttaako oppilaan akateeminen kimmoisuus eli uskomus siitä, että hän kykenee selviytymään menestyksekkäästi koulunkäyntiin liittyvistä haasteista ja vastoinkäymisistä, hänen koulustressin kokemukseensa ja sen muutokseen lukuvuoden aikana. Tutkimuksessa tarkasteltiin myös temperamentin negatiivisen affektiivisuuden ja tahdonalaisen itsesäätelyn yhteyksiä koulustressiin ja sen muutokseen. Vii…

Temperamenttityypin yhteys koulusiirtymän aikana koettuun kouluhyvinvointiin

2016

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 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, …

A proposito di un testo di Arcadio Carisio in tema di quaestio per tormenta de servis (D. 48.18.10.2)

2020

The A. wonders about the reasoning underlying the solution adopted by Arcadio Carisio in a passage that the Justinian compilers took from his liber singularis de testibus (D. 48.18.10.2).

Finite element multi-scale modeling of the failure mechanisms in a 3D woven composite

2013

International audience

Response to the Letter to the editor regarding “Targeting NUPR1 with the small compound ZZW-115 is an efficient strategy to treat hepatocellular carc…

2021

Éléments du décor du sanctuaire d’Apollon Moritasgus à Alésia : la palestre des thermes et le nymphée

2012

International audience

A Quantitative Analysis of the Thermoelastic Effect in CFRP Composite Materials

2010

In this study the thermoelastic signal from carbon fibre-reinforced plastic (CFRP) laminates is investigated. A comparison between the theoretical and experimental values of the thermoelastic signal is reported, with the theoretical predictions obtained from two different quantitative models. These models are based on the classic thermoelastic effect law extended to the case of orthotropic materials (by using the mesomechanical or bulk approach), and the modified law assuming that the surface resin-rich layer behaves as a strain witness of the laminate. It is found that the theoretical predictions of the two models can be strongly and differently influenced by the intrinsic orthotropy of ca…

Evaluation of web reinforcements in prestressed concrete box girders through shear-transverse bending domains

2020

In concrete box girders, the amount and distribution of reinforcements in the webs have to be estimated considering the local effects due to eccentric external loads and cross-sectional distortion and not only the global effect due to the resultant forces of a longitudinal analysis: shear, torsion and bending. This work presents an analytical model that allows designers to take into account the interaction of all these effects, global and local, for the determination of the reinforcements. The model is based on the theory of stress fields and it has been compared to a 3D finite element analysis, in order to validate the interaction domains. The results show how the proposed analytical mode…