Search results for "Presentation"

On the Non-uniform Redundancy of Representations for Grammatical Evolution: The Influence of Grammars

2018

The representation used in grammatical evolution (GE) is non-uniformly redundant as some phenotypes are represented by more genotypes than others. This article studies how the non-uniform redundancy of the GE representation depends on various types of grammars. When constructing the phenotype tree from a genotype, the used grammar determines Bavg, the average branching factor. Bavg measures the expected number of non-terminals chosen when mapping one genotype codon to a phenotype tree node. First, the paper illustrates that the GE representation induces a bias towards small trees. This bias gets stronger with lower Bavg. For example, when using a grammar with Bavg = 0.5, 75% of all genotype…

Variable selection in mixed models: a graphical approach

2014

Model selection can be defined as the task of estimating the performance of dif- ferent models in order to choose the (approximate) best one. The purpose of this article is to introduce an extension of the graphical representation of deviance proposed in the framework of classical and generalized linear models to the wider class of mixed models. The proposed plot is useful in determining which are the important explanatory variables conditioning on the random effects part. The applicability and the easy interpretation of the graph are illus- trated with a real data examples.

The sensorimotor and cognitive integration of gravity.

1998

In order to demonstrate that gravity is not only a load acting locally and continuously on the body limbs, but is also used by higher levels of the nervous system as a dynamic orienting reference for the elaboration of the motor act, a review of several experiments conducted both in 1 g and 0 g are presented. During various locomotor tasks, the strategy that consists of stabilizing the head with respect to gravity illustrates one of the solutions used by the CNS to optimize the control of dynamic equilibrium. A question which remains to be solved when considering experimental results obtained in weightlessness concerns, however, the maintenance of motor schema that has evolved under normal …

On a class of generalised Schmidt groups

2015

In this paper families of non-nilpotent subgroups covering the non-nilpotent part of a finite group are considered. An A 5 -free group possessing one of these families is soluble, and soluble groups with this property have Fitting length at most three. A bound on the number of primes dividing the order of the group is also obtained.

Formal Group Laws for Affine Kac-Moody groups and group quantization

1987

We describe a method for obtaining Formal Group Laws from the structure constants of Affine Kac-Moody groups and then apply a group manifold quantization procedure which permits construction of physical representations by using only canonical structures on the group. As an intermediate step we get an explicit expression for two-cocycles on Loop Groups. The programme is applied to the AffineSU(2) group.

Meningitis carcinomatosa con pleocitosis polimorfonuclear como forma de presentación de un adenocarcinoma gástrico

2003

Reflections on the 25th Congress of the European Society for Pediatric Urology Part 1

2014

The 25th annual meeting of the European Society for Pediatric Urology (ESPU) took place in Innsbruck, Austria from the 7th to 10th of May 2014. The Specialty Chief Editor and nine Associate editors of Frontiers in Pediatrics, Pediatric Urology were in attendance. Each was asked to select the two presentations that they considered most significant. Here, we highlight some of the papers that we found of particular interest and that may impact our practices. This report reflects personal preferences of the authors and does not pretend to be comprehensive or to rank the quality of the presentations. We are aware that some important presentations may not be included. Our selections are presented…

Exploring aesthetics in design : implications for human–computer interaction

2018

In this article, I enter into a discussion of how aesthetics can be conceptualized in the context of design and related to the field of human–computer interaction (HCI). I contest the current trend in design aesthetics that primarily focuses on beauty, pleasure, and the creation of emotional appeal by means of the sensual and visual elements of the design. Conversely, I advocate for a series of concepts related to aesthetics, such as reflectivity, representation, and epistemology, as these point aesthetics beyond the immediate sensual and visual. Through these concepts, a deeper understanding of the character of the relationship between humans and design can be obtained: Design objects and …

Quantification of CD8+ T lymphocytes responsive to human immunodeficiency virus (HIV) peptide antigens in HIV-infected patients and seronegative pers…

1998

/ T cells responding to HIV-1 peptides were observed in none of 11 HIV- seronegative donors without a history of HIV exposure. ELISPOT assays are relatively fast and easy to perform and appear to reliably detect T cell reactivity due to previous exposure to HIV. These findings support the use of the ELISPOT assay for monitoring T cell responsiveness to HIV peptides. In acute infection with the human immunodeficiency virus We described recently an enzyme-linked immunospot (ELISPOT) assay to detect and quantitate single blood-de- type 1 (HIV-1), initial reduction in virus load is associated with the appearance of a high frequency of antiviral cytotoxic T rived CD8 / T lymphocytes forming tumo…

Analytic energy gradients for the spin-free exact two-component theory using an exact block diagonalization for the one-electron Dirac Hamiltonian.

2011

We report the implementation of analytic energy gradients for the evaluation of first-order electrical properties and nuclear forces within the framework of the spin-free (SF) exact two-component (X2c) theory. In the scheme presented here, referred to in the following as SFX2c-1e, the decoupling of electronic and positronic solutions is performed for the one-electron Dirac Hamiltonian in its matrix representation using a single unitary transformation. The resulting two-component one-electron matrix Hamiltonian is combined with untransformed two-electron interactions for subsequent self-consistent-field and electron-correlated calculations. The "picture-change" effect in the calculation of p…