PURPOSE Head mounted displays are a type of wearable technology - a market that is projected to expand rapidly over the coming years. Probably the most well known example is the device Google Glass (or 'Glass'). Here we investigate the extent to which the device display can interfere with normal visual function by producing monocular disability glare. METHODS Contrast sensitivity was measured...

We analyze radial velocities for a sample of 31 Class I and flat spectrum protostars in TaurusAuriga, ρ Ophiuchi and Serpens for evidence of the global dynamical state of extremely young stellar populations buried within parental molecular clouds. Comparing the radial velocity of each protostar to that of the local CO gas, we are able to constrain the one dimensional radial velocity dispersion ...

We present a new census of the Orion Nebula Cluster over a large field of view ( 30′ × 30′), significantly increasing the known population of stellar and substellar cluster members with precisely determined properties. We develop and exploit a technique to determine stellar effective temperatures from optical colors, nearly doubling the previously available number of objects with effective temp...

Irradiation of the primate lens by near-ultraviolet wavelengths results in a blue fluorescence, which can be an intraocular source of veiling glare. This study quantitated the fluorescence intensity as a function of exciting intensity and wavelength. As the exciting wavelength was increased from 360 to 430 nm, the decreasing fluorescence intensity (for equal radiant exposures) was partially off...

The quality of underwater images is often marred by noticeable color casts and blurring, resulting from complex phenomena such as differential light attenuation based on wavelength, veiling scattering, scattering plankton suspended particles in water. In this paper, we propose an effective image enhancement method called Optimal Contrast Attenuation Difference (OCAD) to tackle these issues. OCA...

Scientists use digital camera data as the input to their analysis of image processing algorithms. In this paper we measured the "engineered color errors" introduced by digital camera color processing. Camera manufactures build their color management systems using the sRGB design standard. Although that sRGB is a guideline in the beginning, the final firmware shows certain liberties taken to mak...

Abstract AA Tau is a classical T Tauri star with highly inclined, warped circumstellar disk. For decades, exhibited photometric and spectroscopic variabilities that were successfully modeled as occultations of the primary by material. In 2011, entered an extended faint state, presumably due to enhanced levels dust. We use two sets contemporaneous optical–near-IR (NIR) spectra Tau, obtained in 2...

Abstract We present a study of the Trapezium cluster in Orion. analyze flux-calibrated Very Large Telescope/Multi-Unit Spectroscopic Explorer spectra 361 stars to simultaneously measure spectral types, reddening, and optical veiling due accretion. find that extinction law from Cardelli et al. with total-to-selective value R V = 5.5 is more suitable for this cluster. For 68% sample new types are...

Women’s lack of legal veiling, as the non-feasance of a divine obligation in the Islamic society, is a criminal act for which the law has foreseen punishment. This behavior and its instances are called “tabarruj” (bedizenment) in the Islamic narrations. Notwithstanding the viewpoint of those who follow the superficial enlightenments of recent centuries and do not consider bedizenment so reprehe...