This paper deals with the reduction of flicker in old films. This artifact appears as global, quick and random variations of the luminance and contrast between consecutive frames of a sequence. Initially, we present a method based on the correction of mean and variance parameters of the sequence. However, although this method reduces mean and variance variation between frames, it does not yield...

This document is a summary of the goals, current status and future schedule of the multi-year collaborative proposal [1] to the CfAO “Development, implementation and validation of PSF reconstruction techniques.” The project started in November 2007 at the W. M. Keck Observatory (WMKO) under the direction of D. Le Mignant (PI), with postdoctoral researcher R. Flicker employed for the principal a...

We evaluated four techniques for controlling focus+context screens. We compared an egocentric versus exocentric View mixed with whether the display on the focus screen moves in the same (paper mapping) versus opposite (scroll mapping) direction as input force. Our results show that (i) View had little effect, (ii) users almost always allocated attention to the context screen when controlling th...

This journal is a member of and subscribes to the principles of the Committee on Publication Ethics www.publicationethics.org Editor Jackie Cawsell (UK) BASHH Senior Editor Keith Radcliffe (UK) BASHH Column Editor Daniel Richardson (UK) Associate Editors Sevgi Aral (USA) Stefan Baral (USA) Adam Bourne (UK) Gary Brook (UK) Richard De Visser (UK) Henri de Vries (Netherlands) Claudia Estcourt (UK)...

The paper starts with an overview of different concepts of short-circuit power: the IEC standard, the effective and the apparent short-circuit power. The short-circuit power is a key concept in characterising the ability of a power system to feed fluctuating loads without excessive flicker levels. Its apparent value (from measurements) is generally higher than its standard value (from calculati...

OBJECTIVE The aim of this study was to determine the effects of period of gestation and position of fetal neck on nuchal translucency measurement. MATERIALS AND METHODS Nuchal translucency was measured in the mid-sagittal plane, with the fetal neck in the flexed, neutral, and extended positions in 100 pregnant women between 11 and 13(+6) weeks. Mean nuchal translucency measurements at differe...

Including hypermedia in broadcast video combines content formatted for a lean-forward medium (the Web) with a lean-back one (TV) to form a hybrid medium. We identify four challenges for interacting with and experiencing this new medium. We discuss the role a second screen may play in addressing these challenges.