use of nano-materials has increased in various aspects of human life. however, possible outbreak of nano-materials toxicity in humans and other organisms is one of the future challenges. different chemical precursors which are used in chemical approaches for production of nano-materials may have secondary and sometimes toxic effects in living organisms. these secondary effects may be reduced in...

background physical activity is an important component of health in old age that provides personal independence, physical ability, and quality of life. objectives the current study aimed to evaluate physical activity and associated factors among the elderly population in kashan, iran. patients and methods this is a descriptive cross-sectional study. the sample was 400 elderly people (aged more ...

We present the complete family of space-times with a non-expanding, shear-free, twist-free, geodesic principal null congruence (Kundt waves) that are of algebraic type III and for which the cosmological constant (Λc) is non-zero. The possible presence of an aligned pure radiation field is also assumed. These space-times generalise the known vacuum solutions of type N with arbitrary Λc and type ...

I define central functions c(g) and c(g) in quantum field theory. These quantities are useful to study the flow of the numbers of vector, spinor and scalar degrees of freedom from the UV limit to the IR limit and justify the notions of secondary central charges recently introduced at criticality. Moreover, they are the basic ingredients for a description of quantum field theory as an interpolat...

Optimal Measurements Tasks and Their Physical Realizations

Two experiments examined listeners ability to make accurate inferences about speakers from the nonlinguistic content of their speech. In Experiment I, na€ıve listeners heard male and female speakers articulating two test sentences, and tried to select which of a pair of photographs depicted the speaker. On average they selected the correct photo 76.5% of the time. All performed at a level that ...

We give an introductory review of topological strings and their application to various aspects of superstrings and supersymmetric gauge theories. This review includes developing the necessary mathematical background for topological strings, such as the notions of Calabi-Yau manifold and toric geometry, as well as physical methods developed for solving them, such as mirror symmetry, large N dual...