The problem of pattern is considered in terms of how genetic information can be translated in a reliable manner to give specific and different spatial patterns of cellular differentiation. Pattern formation thus differs from molecular differentiation which is mainly concerned with the control of synthesis of specific macromolecules within cells rather than the spatial arrangement of the cells. ...

A large number of registration techniques rely on manually selected landmark points. A system based on neural principles has been developed to automatically extract landmark types and positional information from magnetic resonance images. A single self-organising map is used to develop the features (landmark types) so that the final landmarks represent statistically significant contour sections...

The inherent order within the XML document-centric data model is typically exposed through positional predicates defined over the XPath navigation axes. Although processing algorithms for each axis have already been proposed, the incorporation of positional predicates in them has received very little attention. In this paper, we present techniques that leverage the power of existing, state of t...

We consider the problem of obtaining sparse positional strategies for safety games. Such games are a commonly used model in many formal methods, as they make the interaction of a system with its environment explicit. Example applications are the synthesis of finite-state systems from specifications in temporal logic and alternating-time temporal logic (ATL) model checking. Often, a winning stra...

1548 Journal of Chemical Education • Vol. 84 No. 9 September 2007 • www.JCE.DivCHED.org Entropy change is categorized in some prominent general chemistry textbooks as being either positional (configurational) or thermal. Positional entropy focuses on the number of positions in space that can be occupied by the molecules of a system. Then, to the extent that more positions exist after a process ...

We analyze the time complexity of exact real arithmetical algorithms in Möbius number systems. Using the methods of Ergodic theory, we associate to any Möbius number system its transaction quotient T and show that the norm of the state matrix after n transactions is of the order T . We argue that the Bimodular Möbius number system introduced in Kůrka [10] has transaction quotient less than 1.1,...

Background: Meniere’s disease (MD) is a chronic illness defined as an idiopathic syndrome of endolymphatic hydrops. Benign paroxysmal positional vertigo (BPPV) is a balance disorder and can be the sequel of diverse inner ear impairments. Objectives: The purpose of this study was to investigate the prevalence of BPPV in MD patients. Materials and Methods: All patients with definite or prob...