Crack surveys of bridge decks, performed over a 10-year period in northeast Kansas as part of three studies, provide strong guidance in identifying the parameters that control cracking in these structures. The surveys involve steel girder bridges—bridges that are generally agreed to exhibit the greatest amount of cracking in the concrete decks. The surveys include monolithic decks and decks wit...

Explicit evaluations of the symmetric Euler integral R 1 0 u (1 u) f(u)du are obtained for some particular functions f . These evaluations are related to duplication formulae for Appell's hypergeometric function F1 which give reductions of F1( ; ; ; 2 ;y; z) in terms of more elementary functions for arbitrary with z = y=(y 1) and for = + 1 2 with arbitrary y; z. These duplication formulae gener...

The electron transfer (ET) from bacteriopheophytin (H) to ubiquinone (UQ) in the photosynthetic reaction center (PSRC) of Rhodopseudomonas (Rps.) viridis was studied by ab initio quantum-chemical calculations. The ET from the H in L-region (HL) to menaquinone (MQ) occurs through the super-exchange mechanism using Trp M250 as a bridge, while in the M-region Leu L189 works as a bridge in the ET f...

We study the coupled problem of a liquid bridge connected to a porous surface and an impermeable surface, where the gap between the surfaces is an externally controlled function of time. The relative motion between the surfaces influences the pressure distribution and geometry of the liquid bridge, thus affecting the shape of liquid penetration into the porous material. Utilizing the lubricatio...

The well-known linear relationship between oxygen consumption and force-length area or the force-time integral is analyzed here for isometric contractions. The analysis, which is based on a biochemical model that couples calcium kinetics with cross-bridge cycling, indicates that the change in the number of force-generating cross bridges with the change in the sarcomere length depends on the for...

Abstract: This survey is a collection of various results and formulas by different authors on the areas (integrals) of five related processes, viz. Brownian motion, bridge, excursion, meander and double meander; for the Brownian motion and bridge, which take both positive and negative values, we consider both the integral of the absolute value and the integral of the positive (or negative) part...

This chapter deals with the analysis of the dynamic behavior of a controlled single-phase H-bridge inverter. The authors show that in addition to border collision bifurcation, when it is controlled with a time-delayed controller or with a dynamic controller that increases the system dimension, the H-bridge inverter can exhibit several other types of behaviors such as Neimark-Sacker bifurcation,...

Contracture due to hypoxia, to both oxygen and glucose deficiency, and to potassium chloride was induced in rat left ventricular papillary muscle preparations. Under contracture conditions, the sum of resting heat plus contracture heat was measured using Hill-type, planar vacuum-deposited thermopiles. On the basis of the measured total and initial heat output and the corresponding tension-time ...

the national bridge stock of iran consists of about 330,000 bridges, of which around 50% are older than 30 years. since 2010, iran road maintenance & transportation organization has started implementing a comprehensive bridge management system in order to manage this aged stock efficiently. to predict future conditions of bridge stock, a heuristic numerical method is presented. this methodology...