Search results for " memory"

Investigation of the Thermomechanical Response of Cyclically Loaded NiTi Alloys by Means of Temperature Frequency Domain Analyses

2021

Nickel–Titanium (NiTi) shape memory alloys subjected to cyclic loading exhibit reversible temperature changes whose modulation is correlated with the applied load. This reveals the presence of reversible thermomechanical heat sources activated by the applied stresses. One such source is the elastocaloric effect, accounting for the latent heat of Austenite–Martensite phase transformation. It is, however, observed that when the amplitude of cyclic loads is not sufficient to activate or further propagate this phase transformation, the material still exhibits a strong cyclic temperature modulation. The present work investigates the thermomechanical behaviour of NiTi under such low-amplitude cyc…

Characteristics of frontal and temporal cortex in relation to cognitive dysfunction in Bipolar Disorders

2011

Terahertz electrical writing speed in an antiferromagnetic memory

2018

The speed of writing of state-of-the-art ferromagnetic memories is physically limited by an intrinsic gigahertz threshold. Recently, realization of memory devices based on antiferromagnets, in which spin directions periodically alternate from one atomic lattice site to the next has moved research in an alternative direction. We experimentally demonstrate at room temperature that the speed of reversible electrical writing in a memory device can be scaled up to terahertz using an antiferromagnet. A current-induced spin-torque mechanism is responsible for the switching in our memory devices throughout the 12-order-of-magnitude range of writing speeds from hertz to terahertz. Our work opens the…

Probabilistic versus deterministic memory limited learning

1995

Parallel Collision Queries on the GPU

2013

We present parallel algorithms to accelerate collision tests of rigid body objects for a high number of independent transformations as they occur in sampling-based motion planning and path validation problems. We compare various GPU approaches with a different level of parallelism against each other and against a parallel CPU implementation. Our algorithms require no sophisticated load balancing schemes. They make no assumption on the distribution of the input transformations and require no pre-processing. Yet, we can perform up to 1 million collision tests per second with our best GPU implementation in our benchmarks. This is about 2.5X faster than our reference multi-core CPU implementati…

Programa de revisión de vida apoyado en las nuevas tecnologías para las personas mayores: Una aplicación de tecnologías positivas

2010

Existe una importante prevalencia de sintomatología depresiva en la población de la tercera edad. Sin embargo, pocas personas mayores reciben tratamiento adecuados para este tipo de dolencias. Entre las opciones terapéuticas disponibles figura la técnica de Revisión de Vida (RV). El objetivo de este artículo es presentar un programa de terapia para personas mayores basado en la técnica de Revisión de Vida a través de las nuevas tecnologías. El programa terapéutico se encuentra implantado en una plataforma tecnológica de e-salud (Sistema Mayordomo) y se enfoca en el entrenamiento de la recuperación de recuerdos autobiográficos específicos positivos. La herramienta tecnológica se dirige a enr…

El ritmo de la sociabilidad festiva en las rallas de Valencia

2018

This paper is concemed with the experience of time in the Festival of the Fallas of Valencia. It attributes a central role to the concept of festive sociability. The first section summarises basic concepts. A second part describes the Festival. The third section deals with the community's collective memory and its cyclic sense of history. The fourth describes the annual cycle of the permanent festive sociability of the Falla. A fifth section is concemed with the intensification of the rhythm of festive sociability during the Festive Event; it produces a reorganisation of time and space which go along with other relevant changes at the personal and community levéis. The participants have an …

Study time effects in recognition memory.

2004

We empirically tested the assumption that study time increases recognition accuracy because the storage of information is better when study time is longer as Shiffrin and colleagues have reported, an assumption common to parallel models of recognition. In the present study with 123 subjects, we examined the effect of item strength on four measures: hit rate, false alarm rate, d′, and β, for a single-word recognition task with longer study times than those usually used in the literature. Analysis indicated significant increase for hit rate and d′ and a decrease in false alarm rate, as one goes from weak to stronger study conditions, and a change in ln(β) when study time is greater than 1 se…

Transcutaneous immunization with imiquimod is amplified by CD40 ligation and results in sustained cytotoxic T-lymphocyte activation and tumor protect…

1999

Transcutaneous immunization (TCI) using ligands of Toll-like receptors (TLRs) and cytotoxic T-lymphocyte (CTL) epitopes lead to the induction of potent T-cell responses. To characterize the efficacy of TCI-mediated CTL activation, we monitored the frequency and functional activity of specific CTL induced with TCI using the ovalbumin-derived epitope SIINFEKL composed in creme containing the synthetic TLR7 ligand R-837. We found that the frequency and activity decayed rapidly 10 d post-TCI. Consistently, no significant memory T-cell formation was detectable. In a prophylactic vaccination setting, TCI was protective against a lethal challenge with ovalbumin expressing EG.7 thymoma cells when t…

Pharmacological approaches in bipolar disorders and the impact on cognition: a critical overview

2012

Dias VV, Balanza-Martinez V, Soeiro-de-Souza MG, Moreno RA, Figueira ML, Machado-Vieira R, Vieta E. Pharmacological approaches in bipolar disorders and the impact on cognition: a critical overview. Objective:  Historically, pharmacological treatments for bipolar disorders (BD) have been associated with neurocognitive side-effects. We reviewed studies which assessed the impact of several psychopharmacological drugs on the neurocognitive function of BD patients. Method:  The PubMed database was searched for studies published between January 1980 and February 2011, using the following terms: bipolar, bipolar disorder, mania, manic episode, or bipolar depression, cross-referenced with cognitive…