101,004 research outputs found
[Letter from Rollo C. Jarreau to T. N. Carswell - December 1, 1941]
No full textA letter written to Mr. T. N. Carswell, Committee on Americanism, Parramore Post No. 57, American Legion, Abilene, Texas, from Rollo C. Jarreau, Editor and Publisher, Alexandria Daily Town Talk, Alexandria, Louisiana, dated December 1, 1941. Rollo C. Jarreau defines Americanism
Accurate and Efficient Dynamic Simulations of Ferroelectric Based Electron Devices
No full textIn recent years electron devices based on ferroelectric materials have attracted a lot of interest well beyond FeRAM memories. Negative capacitance transistors (NC-FETs) have been investigated as steep slope transistors [1], [2], and Ferroelectric FETs (Fe-FETs) are under intense scrutiny also as synaptic devices for neuromorphc computing, where the minor loops in ferroelectrics can allow to achieve multiple values of conductance in read mode [3], [4], [5]. Furthermore, the persistence of ferroelectricity in ultra-thin ferroelectric layers paved the way to ferroelectric tunnelling junctions [6], where a polarization dependent tunneling current can be exploited to realize high impedance memristors, amenable for ultra power-efficient and thus massive parallel computation
Rollo learning to read.
No full textAdded t.p.: The Rollo books by Jacob Abbott.Mode of access: Internet
SANICLAY-T: simple thermodynamic-based anisotropic plasticity model for clays
No full textIn this work the anisotropic model for clays SANICLAY proposed by Dafalias and Taiebat (2013) is reformulated within the framework of hyper-elastoplasticity. The model, called SANICLAY-T, is fully defined by two scalar potential functions, the free energy and the rate of dissipation. It is first presented in the triaxial space and then generalised in the multiaxial one. The model reproduces exactly the original one for the case of associate flow rule, while leads to a different outcome for non-associated flow. When compared to existing hyperplastic models accounting for rotational hardening, the proposed one proves to be more versatile, as characterised by less restrictive constraints on the hardening and asymptotic behaviour of the soil. The predictive capability of the model is illustrated with reference to experimental data on natural and reconstituted clays, highlighting its merits and limitations
A nonlinear anisotropic hyperelastic formulation for granular materials: comparison with existing models and validation
No full textIn this paper, the nonlinear anisotropic hyperelastic model recently proposed by Houlsby et al. (2019) is critically analysed and validated against experimental data. The model, here mainly discussed in terms of its strain energy function, is initially compared to existing formulations for the cases of nonlinear isotropic, linear anisotropic and the complete nonlinear anisotropic formulation. It is observed that the proposed model, which employs very few material parameters, encompasses most, but not all, of the existing anisotropic hyperelastic ones and provides a satisfactory fitting to laboratory experimental data observed on both sands and clays
Non-linear anisotropic hyperelasticity for granular materials
No full textWe describe a non-linear anisotropic hyperelastic model appropriate for geomaterials, deriving the full stressstrain response from strain energy or complementary energy functions. Specific forms of the functions are chosen so that the stiffness and compliance matrices have the appropriate minor symmetries. The model employs two material parameters to describe basic volumetric and shear response, one to express nonlinearity of stiffness as a function of mean stress, and two more (together with the directions of the principal axes of anisotropy) to express the degree of anisotropy. The model is modular, so that non-linearity and anisotropy can be included separately or in combination. For specific parameter settings it reduces to simpler cases such as linear isotropic elasticity. Because the model employs hyperelasticity, thermodynamic acceptability is ensured and all appropriate cross-coupling terms are included between the shear and volumetric behaviour
Towards a cultural understanding of addictive behaviours. The image of the social environment among problem gamblers, drinkers, internet users and smokers.
No full textThe current study examines whether cultural differences in the way of interpreting the social environment affect the probability of different kinds of addictive behaviours. Subjective cultures of the social environment were detected through the questionnaire on the Interpretation of the Social Environment (ISE) in a convenience sample of 771 participants from Italy. Problem gambling, drinking, internet use and smoking were assessed. A problem group was identified and a healthy group was selected for each of the four kinds of harmful behaviours. Logistic regressions were used to compare problem groups and control on ISE scores of subjective cultures. Problem groups of gamblers, drinkers and internet users were found to differ from control in their evaluation of the social environment, which they considered very unreliable. The problem group of smokers differs from control in their relationship with the social environment, viewed as an anomic place. The findings support the idea that subjective cultures associated with a critical image of the social environment, disparaging social ties and the rules of living together, are more likely to be associated to a maladaptive pattern of behaviour, as addiction can be understood
Influence of one vs. two matches a week on physiological and psychological profile of sub-elite footballers
No full textLetter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
- …
