The feasibility of using railroad flatcars (RRFCs) as the superstructure for bridges on lowvolume roads has been investigated in two previous research projects at Iowa State University. The results of these projects verified that RRFCs are efficient and economical alternatives for low-volume road bridges. Two county engineers involved with the RRFC project cited cost as the main factor for choo...

It is generally thought that to generate active force in muscle, myosin heads (cross-bridges) that are attached to actin undergo large-scale conformational changes. However, evidence for conformational changes of the attached cross-bridges associated with force generation has been ambiguous. In this study, we took advantage of the recent observation that cross-bridges that are weakly attached t...

Atlas bridges, the bony outgrowths over the third segment of the vertebral artery are associated with compression of the artery and nerves. There are limited studies comparing morphometry of the complete atlas bridges and that of the ipsilateral transverse foramen. Bilateral and gender differences in the morphometry of the complete bridges remain relatively unexplored. One hundred and two atlas...

in the response phase the most important step is to assess disaster after occurrence. by disaster assessment, we can obtain all the needed information for controlling, decision-making and also disaster planning. lack of disaster assessment causes you to make unsuitable decisions ba sed on limited or inadequate data which leads to imperfect disaster response. according to ifrc, disaster response...

Analyze the major tendency of degradation of concrete bridges through the study of the main causes of their degradation firstly; then analyze the process fold line of their degradation via the aspect of reliability; thirdly, study the law and the characteristics of the degradation of bridges from structural elements; eventually got the entire trend of the degradation of concrete bridges.

This work demonstrates an innovative numerical method for counting and locating eigenvalues with the Evans function. Utilizing the geometric phase in the Hopf bundle, the technique calculates the winding of the Evans function about a contour in the spectral plane, describing the eigenvalues enclosed by the contour for the Hocking-Stewartson pulse of the complex Ginzburg-Landau equation. Locatin...

The rearrangement process during liquid phase sintering has been generally accepted that driven by the capillary forces between solid grains embedded in liquid. This paper outlines a computer-based method for three-dimensional computer simulation of rearrangement during liquid phase sintering. The theoretical models dealing with the fundamental interaction forces that exist between grains attac...

THROUGH THE DEVELOPMENT of epidemiologic studies we are able to say that 3.5% of the general population suffer from panic disorder1 with serious personal and social repercussions, such as depression, substance abuse, and suicidal tendencies.2 According to the DSM-IV,3 the essential feature of panic disorder (PD) is the occurrence of panic attacks. A panic attack is a sudden onset period of inte...

We outline a new approach to the steering problem for quantum systems relying on Nelson’s stochastic mechanics and on the theory of Schrödinger bridges. The method is illustrated by working out a simple Gaussian example.