The evolution of high redshift galaxies in the two Hubble Deep Fields, HDF-N and HDF-S, is investigated using a cloning technique that replicates z ∼ 2 − 3 U dropouts to higher redshifts, allowing a comparison with the observed B and V dropouts at higher redshifts (z ∼ 4 − 5). We treat each galaxy selected for replication as a set of pixels that are k-corrected to higher redshift, accounting fo...

License plate recognition (LPR) by using morphology has the advantage of resistance to brightness changes; high speed processing, and low complexity. However these approaches are sensitive to the distance of the plate from the camera and imaging angle. Various assumptions reported in other works might be unrealistic and cause major problems in practical experiences. In this paper we considered ...

Background: We aimed to evaluate the current status of scientific production in the field of substance use and addiction in Iran, to determine its trend and pattern during a 5 years period (2008-2012). Methods: Using relevant keywords, we searched three international databases (Web of Science, Medline, and Scopus) and two local databases (SID and Iranmedex) to locate the papers published in the...

Brightness (perceived intensity) and lightness (perceived reflectance) matching were investigated in seven well-known visual stimuli that contain a visible shadow or transparent overlay. These stimuli are frequently upheld as evidence that low-level spatial filtering is inadequate to explain brightness/lightness illusions and that additional mid- or high-level mechanisms are required. The argum...

A total lunar eclipse is conjectured to have influence on the physical conditions of an environmental area, particularly on the brightness of the sky. The phenomenon might also be relevant on weather parameters change on Earth, such as temperature, humidity and pressure, though a straightforward correlation is not easy to establish. This work mainly aims at measuring the brightness of the sky a...