sustainable transportation with the aim of urban sustainable development aims to improve the environmental quality and the socio-economic condition. one of the most important strategies for achieving sustainable transportation is planning and designing for walking, or in other words increasing urban walkability. therefore, increased walkability has become a key issue in urban planning. understa...

We consider the period-doubling and intermittency transitions in iterated nonlinear one-dimensional maps to corroborate unambiguously the validity of Tsallis’ non-extensive statistics at these critical points. We study the map xn+1 = xn + u |xn| , z > 1, as it describes generically the neighborhood of all of these transitions. The exact renormalization group (RG) fixed-point map and perturbatio...

Spatial and temporal aberration detection methods for disease outbreaks in syndromic surveillance systems Dongmei Chen a , John Cunningham b , Kieran Moore c & Jie Tian d a Department of Geography, Queen's University, Kingston, ON, Canada b Leeds, Grenville & Lanark District Health Unit, ON, Canada c Department of Family Medicine, Queen's University, Kingston, Canada d Department of Geology & G...

Affinity chromatography based on the complex formation of the modified nucleoside Q with boronic acid has been applied to the isolation of specific tRNA precursors containing this modified nucleoside. When [32P]RNA isolated from an Escherichia coli strain containing a thermolabile ribonuclease P was chromatographed on dihydroxyboryl-substituted cellulose, the precursors for asparagine, aspartat...

A rudimentary, one-zone, closed-box model for inhomogeneous chemical evolution is offered as an alternative reference than the Simple model in the limit of no mixing. The metallicity distribution functions (MDFs) of Galactic halo and bulge stars can be matched by varying a single evolutionary parameter, nQ. Q is the filling factor of contaminating regions and n is the number of star-forming gen...

Three interior point methods are proposed for sufficient horizontal linear complementarity problems (HLCP): a large update path following algorithm, a first order corrector-predictor method, and a second order corrector-predictor method. All algorithms produce sequences of iterates in the wide neighborhood of the central path introduced by Ai and Zhang. The algorithms do not depend on the handi...

,4bstract.--This article is a continuation of the previous one by the authors on the same subject. With the aid of additional data, •t is once more found that the quantities a and b in the formula Q=aq-b $ vary with sunspot activity, and apparently also with time; Q is the measure of magnetic activity, and S that of solar activity. The parameter a varies directly, and b inversely with sunspot a...

Systematic chemical studies indicate that the capability of Watson-Crick base-pairing is widespread among potentially natural nucleic acid alternatives taken from RNA's close structural neighborhood. A comparison of RNA and such alternatives with regard to chemical properties that are fundamental to the biological function of RNA provides chemical facts that may contain clues to RNA's origin.