We investigate coherent Rayleigh-Brillouin spectroscopy as an efficient process to measure the bulk viscosity of gases at gigahertz frequencies. Scattered spectral distributions are measured using a Fizeau spectrometer. We discuss the statistical error due to the fluctuating mode structure of the used pump laser. Experiments were done for both polar and nonpolar gases and the bulk viscosity was...

abstract: appealing to the principle of vertical residence and stemming the horizontal expansion of the city, the tehran milad tower is being built on 35000 sm3 site with the total area of 220000 sm3. with a height of over 170m, this 56-story concrete building is in the final stages of construction and would be the highest residential building of iran. since tehran is located in a high-risk ear...

Di Francia showed that the number of degrees of freedom in two-dimensional (2-D) monochromatic or incoherent images detected by spatial-bandwidth-limited far-field receivers is approximately equal to the product of the spatial bandwidth of the imaging system and the spatial extent of the object.1 Several researchers have noted that this limit on the information content of imaging fields may be ...

Date The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. The creation of a gas of ultracold polar molecules with a high phase space density brings new possibilities beyond experiments with ultracold atomic gases. In particular, long-range, an...

Simple equations are derived to carry out degree of freedom analyses quickly and almost mechanically, using easily countable physical entities. It is shown that the outlet stream freedom does not depend on the number of component substances, and in many cases not on the number of phases. The concept of phase constraint is introduced to facilitate the degree of freedom analysis.

By showing that transitions may be obviated by recruiting degrees of freedom in the coupled pendulum paradigm, the authors reveal a novel mechanism for coordinative flexibility. In Experiment 1, participants swung pairs of unconstrained pendulums in 2 planes of motion (sagittal and frontal) at 8 movement frequencies starting from either an in-phase or antiphase mode. Few transitions were observ...

The article offers a conceptual framework for describing freedom and power in terms of human behavior in multiple overlapping systems. Power and freedom describe relations of influence and susceptibility over the principles, policies, perceptions and preferences; outcomes; and configurations available to human beings, in each case as characterized by the affordances and constraints of an agent ...