نتایج جستجو برای: graphic organizers

تعداد نتایج: 17518  

Journal: :Development 2010
Laura N Vandenberg Michael Levin

How embryos consistently orient asymmetries of the left-right (LR) axis is an intriguing question, as no macroscopic environmental cues reliably distinguish left from right. Especially unclear are the events coordinating LR patterning with the establishment of the dorsoventral (DV) axes and midline determination in early embryos. In frog embryos, consistent physiological and molecular asymmetri...

Journal: :Journal of Graph Theory 2018
James F. Geelen Bert Gerards Geoff Whittle

Frame matroids and lifted-graphic matroids are two interesting generalizations of graphic matroids. Here we introduce a new generalization, quasi-graphic matroids, that unifies these two existing classes. Unlike frame matroids and lifted-graphic matroids, it is easy to certify that a matroid is quasi-graphic. The main result of the paper is that every 3-connected representable quasi-graphic mat...

Journal: :Seminars in Cell & Developmental Biology 2017

Journal: :Trends in genetics : TIG 1997
G H Thomsen

The vertebrate organizer has been of intense interest since its discovery in amphibia by Spemann and Mangold in the early 1920s (Ref. 1). The organizer was operationally defined as a piece of tissue that can induce a duplicated dorsal body axis and head when transplanted into the ventral side of a host embryo. The original Spemann and Mangold organizer experiment provided the first convincing d...

Journal: :Robotics and Autonomous Systems 2001
Frans C. A. Groen Wiebe van der Hoek Pieter P. Jonker Ben J. A. Kröse Hans J. W. Spoelder Stefano Stramigioli

The authors, as the local organizers of the RoboCup European Championship, present a brief, informal overview of this event, with the aim to archive the main results, but also as a report to support organizers of future RoboCup events in the organization and coordination of such a rather complex tournament. © 2001 Published by Elsevier Science B.V.

Journal: :Discrete Mathematics 2015

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