In an attempt to understand the relationship between quasi-static and dynamic test results, repeatable, dynamic rollover tests were conducted on production vehicles to determine intrusion and intrusion velocities using the Jordan Rollover System (JRS). These tests included complete production vehicles and body bucks at reduced weight, to vary the roof strength-to-weight ratio. Data from these t...

The roof plate is a well known signaling center in CNS development, but its roles in the developing telencephalon and the common holoprosencephaly (HPE) malformation have been uncertain. Using cellular ablations in mice, we show that roof plate cell loss causes failed midline induction and HPE in the dorsal telencephalon. This morphologic phenotype is accompanied by selective deficits in midlin...

J. S. Spencer, 2, ∗ N. S. Blunt, W. A. Vigor, F. D. Malone, W. M. C. Foulkes, James J. Shepherd, and A. J. W. Thom ∗ Department of Materials, Imperial College London, Exhibition Road, London, SW7 2AZ, United Kingdom Department of Physics, Imperial College London, Exhibition Road, London, SW7 2AZ, United Kingdom University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW, United Kingdom D...

The thirteenth AAAI Mobile Robot Competition and Exhibition was held last July, in conjunction with the Nineteenth National Conference on Artificial Intelligence (AAAI 2004), in San Jose, California. The primary purpose of the Mobile Robot Competition and Exhibition is to bring together researchers and students from academe and industry to showcase the latest state-of-the-art mobile robot capab...

The exhibition of the American Association for the Advancement of Science will this year be held at the Baker Hotel, Dallas, Texas, from December 29 through January 1, 1942. We again wish to express our appreciation for the cooperation that we have received from the exhibitors who have helped to maintain the high standards of the exhibition. Some institutions and concerns who have recently deci...

BACKGROUND Neurulation is driven by apical constriction of actomyosin cytoskeleton resulting in conversion of the primitive lumen into the central canal in a mechanism driven by F-actin constriction, cell overcrowding and buildup of axonal tracts. The roof plate of the neural tube acts as the dorsal morphogenetic center and boundary preventing midline crossing by neural cells and axons. METHO...

During spinal cord development, commissural neurons extend their axons ventrally, away from the roof plate. The roof plate is the source of a diffusible repellent that orients commissural axons in vitro and, thus, may regulate the trajectory of commissural axons in vivo. Of three Bmps expressed in the roof plate, BMP7, but not BMP6 or GDF7, mimics the roof plate activity in vitro. We show here ...

Collapse of roof could cause severe economic loss and poses safety risk to residents in the building. This paper presents a nonlinear dynamic analysis of steel framed roof structures with force limiting devices under combined static and transient wind loading. Two types of force limiting devices – one with selfcentering behavior and the other exhibiting bilinear-like hysteresis are examined for...