Spike timing-dependent plasticity (STDP) is a form of Hebbian learning which is thought to underlie structure formation during development, and learning and memory in later life. In this paper we show that the intrinsic properties of the postsynaptic neuron might have a deep influence on STDP dynamics, by shaping the causal correlation between the pre and the postsynaptic spike trains. In parti...

A full characterization of when a subgroup H of a group G in a varietal product NQ is epimorphically embedded in G (in the variety NQ ) is given. From this, a result of S. McKay is derived , which states that if NQ has instances of nonsurjective epimorphisms, then N also has instances of nonsurjective epimorphisms. Two partial converses to McKay’s result are also given: when G is a finite nonab...

The present study shows that search for a conjunction of color and orientation can be performed in parallel when the target is embedded in a spatially contiguous subset of nontarget elements. When the colored subset is spatially scattered among other items in the display, serial search through the colored subset is necessary. The results provide evidence for the notion of sequential parallel pr...

Sufficient conditions are given for groups of finite Morley rank having non-trivial torsion-free nilpotent normal subgroups to have linear representations with small kernels. In particular, centreless connected soluble groups of finite Morley rank with torsion-free Fitting subgroups have faithful linear representations. On the way, using a notion of definable weight space, we prove that certain...

In this paper we present a novel approach for patternconstrained test case generation. The generation of test cases with known characteristics is usually a non-trivial task. In contrast, the proposed method allows for a transparent and intuitive modeling of the relations contained in the test data. For the presented approach, we utilize a general-purpose data generator: It relies on easy to und...

This report defines a sufficiently expressive sublanguage of the behavioural modelling constructs of UML allowing to capture industrial real time applications. Covered aspects include in particular the concept of Active Objects, polymorphism as well as a detailed presentation of UML statecharts. For the chosen restrictive sublanguage, the zero-time semantics is given at two levels of abstractio...

Proper minimal surfaces in R3 have peculiar properties that are not shared by general minimal surfaces; especially in the embedded case. It has been proved that, under additional conditions, this family of surfaces has strong restrictions on their conformal structures. For instance, Huber and Osserman proved that if M is a complete minimal surface with finite total curvature, then M has the con...

‎In this study‎, ‎Frattini supplement subgroup and Frattini supplemented group‎ ‎are defined by Frattini subgroup‎. ‎By these definitions‎, ‎it's shown that‎ ‎finite abelian groups are Frattini supplemented and every conjugate of a‎ ‎Frattini supplement of a subgroup is also a Frattini supplement‎. ‎A group action‎ ‎of a group is defined over the set of Frattini supplements of a normal‎ ‎subgro...

Let H be a subgroup of a finite group G. We say that H is SS-semipermutable in Gif H has a supplement K in G such that H permutes with every Sylow subgroup X of Kwith (jXj; jHj) = 1. In this paper, the Structure of SS-semipermutable subgroups, and finitegroups in which SS-semipermutability is a transitive relation are described. It is shown thata finite solvable group G is a PST-group if and on...

PURPOSE This nonrandomized feasibility study was designed to provide a preliminary assessment of the impact of a narrative and vocabulary instruction program provided by a speech-language pathologist (SLP) in a regular classroom setting. METHOD Forty-three children attending 2 first-grade classrooms participated in the study. Children in each classroom were divided into high- and low-risk sub...