Search results for "Function"

Building on 150 Years of Knowledge : The Freshwater Isopod Asellus aquaticus as an Integrative Eco-Evolutionary Model System

2021

Interactions between organisms and their environments are central to how biological diversity arises and how natural populations and ecosystems respond to environmental change. These interactions involve processes by which phenotypes are affected by or respond to external conditions (e.g., via phenotypic plasticity or natural selection) as well as processes by which organisms reciprocally interact with the environment (e.g., via eco-evolutionary feedbacks). Organism-environment interactions can be highly dynamic and operate on different hierarchical levels, from genes and phenotypes to populations, communities, and ecosystems. Therefore, the study of organism-environment interactions requir…

B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo

2017

We use an atomistic spin model derived from density functional theory calculations for the ultra-thin film Pd/Fe/Ir(111) to show that temperature induces coexisting non-zero skyrmion and antiskyrmion densities. We apply the parallel tempering Monte Carlo method in order to reliably compute thermodynamical quantities and the B-T phase diagram in the presence of frustrated exchange interactions. We evaluate the critical temperatures using the topological susceptibility. We show that the critical temperatures depend on the magnetic field in contrast to previous work. In total, we identify five phases: spin spiral, skyrmion lattice, ferromagnetic phase, intermediate region with finite topologic…

Relaciones entre Funciones ejecutivas y calidad de vida de jóvenes con trastorno por déficit de atención con hiperactividad (TDAH).

2015

ResumenAntecedentes y objetivos. Pocos estudios han analizado la contribución del funcionamiento ejecutivo (FE) a la calidad de vida (CAV) en sujetos con TDAH. Objetivos del trabajo: (1) Explorar las diferencias entre adultos con y sin TDAH en  calidad de vida (2) Comparar la calidad de vida entre adultos TDAH con y sin dificultades en funcionamiento ejecutivo (3) Analizar la influencia de los problemas en Funciones ejecutivasven la calidad de vida de adultos con TDAH. Métodología. 36 jóvenes con TDAH y 27 sin el trastorno cumplimentaron cuestionarios sobre calidad de vida y funcionamiento ejecutivo Resultados. Se hallaron diferencias estadísticamente significativas entre jóvenes TDAH con y…

Effects of assisted training with neurofeedback on EEG measures, executive function and mood in a healthy sample

2015

The training in neurofeedback (NF) consists of teaching individuals to modify, adjust and enhance their brain activity pattern. The aim of our research was to evaluate the effect of training on cognitive processes, specifically executive function, and mood in a non-clinical sample. A sample of 30 female college students were assigned to three groups: RH: right hemisphere (n = 10), LH: left hemisphere (n = 10) and control (n = 10). The dominance pattern of beta and the inhibition of the theta pattern were trained in a single session. Measures of executive function (Iowa Gambling Test) and questionnaires of mood were taken pre and post training. We found that NF training produced significant …

Comparing various concepts of function prediction. Part 1.

1974

Prediction: f(m+1) is guessed from given f(0), ..., f(m). Program synthesis: a program computing f is guessed from given f(0), ..., f(m). The hypotheses are required to be correct for all sufficiently large m, or with some positive frequency. These approaches yield a hierarchy of function prediction and program synthesis concepts. The comparison problem of the concepts is solved.

On speeding up synthesis and prediction of functions

1974

Fixed Point Theorems with Applications to the Solvability of Operator Equations and Inclusions on Function Spaces

2015

Fixed point theory is an elegant mathematical theory which is a beautiful mixture of analysis, topology, and geometry. It is an interdisciplinary theory which provides powerful tools for the solvability of central problems in many areas of current interest in mathematics and other quantitative sciences, such as physics, engineering, biology, and economy. In fact, the existence of linear and nonlinear problems is frequently transformed into fixed point problems, for example, the existence of solutions to partial differential equations, the existence of solutions to integral equations, and the existence of periodic orbits in dynamical systems. This makes fixed point theory a topical area and …

Recent Developments on Fixed Point Theory in Function Spaces and Applications to Control and Optimization Problems

2015

Nonlinear and Convex Analysis have as one of their goals solving equilibrium problems arising in applied sciences. In fact, a lot of these problems can be modelled in an abstract form of an equation (algebraic, functional, differential, integral, etc.), and this can be further transferred into a form of a fixed point problem of a certain operator. In this context, finding solutions of fixed point problems, or at least proving that such solutions exist and can be approximately computed, is a very interesting area of research. The Banach Contraction Principle is one of the cornerstones in the development of Nonlinear Analysis, in general, and metric fixed point theory, in particular. This pri…

Estética y diseño industrial: debates y controversias

2019

En el presente texto se argumenta la importancia de la dimensión estética en el ámbito del diseño industrial, al tiempo que se abordan desde la perspectiva de la reflexión estética algunos de los principales debates que han tenido lugar en la cultura del diseño. Estos debates se han articulado en torno a la idiosincrasia propia del diseñador y su actividad; la relación entre arte y diseño; la controversia en torno a la forma y la función; la importancia de las dimensiones simbólica y emotiva del producto; y la encrucijada del diseño entre los proyectos de emancipación social o a la difusión de una estética banal. This text argues the importance of the aesthetic dimension in the field of ind…

Theoretical space-time modelling of the diffusion of raw materials and manufactured objects

2013

International audience; Workgroup 3 of ArchaeDyn II programme focuses its study on the diffusion systems of ancient products. In order to be able to structure data in GIS in an appropriate way, we propose a general theoretical modelling integrating the different components of the diffusion systems, and identifying their interactions and the factors affecting the location of products and their transfers. Three dimensions are considered: the Time, the Space and the Function of places. A product's pathway can be apprehended efficiently by distinguishing spatial entities as well as functional entities. This modelling highlights the fact that the approach through the simple notion of "site" is n…