In the present work we observe two subjects interacting in a collaborative task on a shared environment. One goal of the experiment is to measure the change in behavior with respect to gaze when one interactant is wearing dark glasses and hence his/her gaze is not visible by the other one. The results show that if one subject wears dark glasses while telling the other subject the position of a ...

Studies of the peculiar velocities of galaxies and clusters of galaxies suggest that much of the matter of the universe is dark. The spatial distribution of light, the galaxies, is most probably not the same as the distribution of the dark matter. I present a very biased view of how these two distributions are related. In this view, galaxies form in gravita-tionally bound dark matter haloes, an...

Grating-based X-ray dark-field imaging is a novel technique for obtaining image contrast for object structures at size scales below setup resolution. Such an approach appears particularly beneficial for medical imaging and nondestructive testing. It has already been shown that the dark-field signal depends on the direction of observation. However, up to now, algorithms for fully recovering the ...

Chemotherapy drugs can affect the skin and its appendages. Several clinical presentations can be observed, depending on the affected structure. The most common dermatological side effect is chromonychia. The main causative agents are: (1) cyclophosphamide, which can provoke a diffuse, black pigmentation, longitudinal striae and dark grey pigmentation located proximally on the nails; (2) doxorub...

If the massive compact halo object (MACHO) fraction of the Galactic dark halo is f ∼ 20% as suggested by some microlensing experiments, then about 1.2% of lensing events toward the Galactic bulge are due to MACHOs. For the 40% of these that lie nearby (Dl < 4 kpc), measurement of their distance Dl would distinguish them from bulge lenses, while measurement of their transverse velocity vl would ...

: Optical separate spatial dark and bright soliton pairs in steady-state case in one dimension, for a series circuit consisting of two-photon photorefractive (PR) crystal are investigated. Each crystal can be supported the spatial soliton, and at least one must be photovoltaic. The two solitons are known collectively as separate spatial soliton pairs with dark–dark, bright–dark and bright–brigh...

In this study, we describe an integrated solution for video surveillance in a fortified environment. The focus of this study is on identification of real time objects on different environments. The system is composed of robust object detection module, which normally detects the presence of abandoned objects, concealed objects hidden inside the human clothing, objects in dark environment and per...