Search results for "theoretical model"

Competition between intrinsic and extrinsic effects in the quenching of the superconducting state in FeSeTe thin films

2015

We report the first experimental observation of the quenching of the superconducting state in current-voltage characteristics of an iron-based superconductor, namely, in FeSeTe thin films. Based on available theoretical models, our analysis suggests the presence of an intrinsic flux-flow electronic instability along with non-negligible extrinsic thermal effects. The coexistence and competition of these two mechanisms classify the observed instability as halfway between those of low-temperature and of high-temperature superconductors, where thermal effects are respectively largely negligible or predominant.

Hydrodynamic chromatography of macromolecules on small spherical non-porous silica particles

1990

Abstract Non-porous silica spheres with sizes in the range 1.4–2.7 μm were applied as packings for the hydrodynamic chromatography (HDC) of macromolecules. Highly efficient columns, with a reduced plate height below 2, were packed with these small particles. Up to molecular weights of 10 6 the elution behaviour of polystyrenes agreed very well with existing theoretical models. However, for larger polystyrenes the flow-rate exerted an influence on the relative peak positions. The applicability of HDC to rapid separations of soluble macromolecules and inorganic colloids was demonstrated.

Study on New Product Development, by Networking

2015

The paper presents a situation of working in network in order to design or improve a new product. To implement theoretical models and to validate a working algorithm into a virtual research, there was proposed a specific theme from drilling and chamfering tool. The facilities offered by the research centers – database, software - led to rapid selection and configuration solutions, demonstrating achieving research productivity growth and a substantial reduction of times redesign.

Cognitive processes related to problematic pornography use (PPU): A systematic review of experimental studies

2021

Highlights • Some people experience symptoms derived from pornography viewing. • Cognitive processes may be related to the development of Problematic Pornography Use (PPU). • We performed a systematic review of 21 studies exploring cognitive processes related to PPU. • We identified 4 cognitive processes relevant for the development and maintenance of PPU.

Apoyo social de familia, profesorado y amigos, ajuste escolar y bienestar subjetivo en adolescentes peruanos

2021

espanolIntroduccion: La psicologia positiva ha senalado la importancia del bienestar subjetivo de los adolescentes, por ser un precursor del desarrollo positivo de los jovenes. La investigacion resalta la importancia del apoyo social percibido y el ajuste escolar como determinantes del bienestar adolescente. Por ello, este articulo tiene como finalidad analizar las relaciones de la percepcion de apoyo social (de familia, profesorado, amigos) con el bienestar subjetivo de los adolescentes, mediado por su ajuste escolar. Metodo: Participaron 1035 estudiantes peruanos de educacion secundaria, con edades entre 12 y 16 anos. Se probaron dos modelos teoricos con variables latentes, uno con mediac…

Behavior in compression of lightweight fiber reinforced concrete with hooked steel fibers and transverse steel reinforcement

2010

Load Carrying Capacity of Glass Columns with Rectangular, T and X Transverse Cross-sections

2014

In this study, the load carrying capacities of glass columns with rectangular, T and X cross-sections having different lengths were calculated. The proposed analytical procedure allows to calculate the load carrying capacity associated with strength of transverse cross-section including local and global flexural and/or torsional buckling phenomenon. Moreover, initial imperfections and time dependant effects, the latter associated with the viscoelastic behaviour of interlayer (PVB), were included in the model as suggested in the literature. Those effects were calculated by introducing the equivalent thickness of glass panels, which takes into account the shear modulus of PVB and the viscolea…

Extracting Structured Knowledge From Sensor Data for Hybrid Simulation

2014

Obtaining continuous and detailed monitoring of indoor environments has today become viable, also thanks to the widespread availability of effective and flexible sensing technology; this paves the way for the design of practical Ambient Intelligence systems, and for their actual deployment in real-life contexts, which require advanced functionalities, such as for instance the automatic discovery of the activities carried on by users. Novel issues arise in this context; on one hand, it is important to reliably model the phenomena under observation even though, to this end, it is often necessary to craft a carefully designed prototype in order to test and fine-tune the theoretical models.

Sex-role orientation and memory for gender-related terms: Another uncertain link

1989

Two studies are reported which investigate the relationship between sex-role orientation and memory for gender-related terms. Based on the concept of ‘cognitive schema’, theoretical models have recently been advanced suggesting that the schematic cognitive representation of gender facilitates the recall of words pertinent to gender. One of these models, Markus' self-schema theory, proposes that masculine and feminine sex-typed individuals have a better memory for terms that correspond to their respective self-schemata. In contrast, Bem's gender schema theory implies that sex-typed individuals have a better memory for the category of gender as a whole, i.e. for both masculine and feminine te…

A Hooke's law-based approach to protein folding rate

2014

Kinetics is a key aspect of the renowned protein folding problem. Here, we propose a comprehensive approach to folding kinetics where a polypeptide chain is assumed to behave as an elastic material described by the Hooke[U+05F3]s law. A novel parameter called elastic-folding constant results from our model and is suggested to distinguish between protein with two-state and multi-state folding pathways. A contact-free descriptor, named folding degree, is introduced as a suitable structural feature to study protein-folding kinetics. This approach generalizes the observed correlations between varieties of structural descriptors with the folding rate constant. Additionally several comparisons am…