Binaural synthesis utilizing head-related transfer functions (HRTFs) is a common approach to auralize virtual acoustic sources. HRTFs represent the acoustic free field transmission path from the source to the outer ears. They capture the acoustic characteristics of the outer ears which are exploited by the human auditory system in order to deduce spatial information. HRTFs differ amongst indivi...

Abstract The local field correction to the spontanous dacay rate of an impurity source atom imbedded in a disordered dielectric is calculated to second order in the dielectric density. The result is found to differ from predictions associated with both ”virtual” and ”real” cavity models of this decay process. However, if the contributions from two dielectric atoms at the same position are inclu...

The Advanced Light Source (ALS) beamline (BL) 10.3.2 is an apparatus for X-ray microprobe spectroscopy and diffraction experiments, operating in the energy range 2.4-17 keV. The performance of the beamline, namely the spatial and energy resolutions of the measurements, depends significantly on the collimation quality of light incident on the monochromator. In the BL 10.3.2 end-station, the sync...

Quantum electrodynamics (qed) is used to derive the differential cross sections measured in the three new experimental internal source ensemble xray holographies: bremsstrahlung (BXH), fluorescence (XFH), and multipleenergy (MEXH) x-ray holography. The polarization dependence of the BXH cross section is also obtained. For BXH, we study analytically and numerically the possible effects of the vi...

In part II of this two-part tutorial we review the underlying theory of seismic interferometry and discuss various new advances. In the 1990’s the method of time-reversed acoustics was developed. This method employs the fact that the acoustic wave equation for a lossless medium is invariant for time-reversal. When ultrasonic responses recorded by piezoelectric transducers are reversed in time a...

in this paper, free convection in an inclined stepped chamber has been studied. one wall of this enclosure is kept cold and the opposite wall equipped with constant heat source. the remaining walls are maintained adiabatic. there is one adiabatic step on the bottom wall. the aim of the present study is to forecast the effect of raleigh number, slope of enclosure, step dimension, and heat source...

Alongside spoken communication human conversation has a non-verbal component that conveys complex and subtle emotional and interpersonal information. This information is conveyed largely bodily with postures, gestures and facial expression. In order to capture the Kansei aspects of human interaction within a virtual environment, it is therefore vital to model this bodily interaction. This type ...

The ActiveWorld toolkit is an open source toolkit developed at Indiana University. It allows researchers to explore social diffusion patterns in three-dimensional (3D) virtual worlds, specifically those built using ActiveWorlds technology. Written in pure Java, the toolkit provides the ability to not only visualize the structure of virtual worlds (spatial position of 3D objects, their size and ...

The ActiveWorld toolkit is an open source toolkit developed at Indiana University. It allows researchers to explore social diffusion patterns in three-dimensional (3D) virtual worlds, specifically those built using ActiveWorlds technology. Written in pure Java, the toolkit provides the ability to not only visualize the structure of virtual worlds (spatial position of 3D objects, their size and ...