The aim of the present paper is to analyze reflectance and transmittance measurements on small scattering and absorbing samples. The long term goal is to perform quantitative, spectroscopic in vivo measurements of pigments in small samples of plant material. Small samples such as small leaves constitute a special experimental challenge in cases in which the sample beam has a larger cross-sectio...

Fourier phasing is the problem of retrieving Fourier phase information from Fourier intensity data. The standard Fourier phase retrieval (without a mask) is known to have many solutions which cause the standard phasing algorithms to stagnate and produce wrong or inaccurate solutions. In this paper Fourier phase retrieval is carried out with the introduction of a randomly fabricated mask in meas...

Sensory storage shows a short-lived part-report advantage that survives an aftercoming visual noise pattern (Smithson & Mollon, 2006). We tested whether such an advantage survives different types of high-contrast mask. The target was a 3 × 4 array of digits. The mask could be (a) a noise pattern, (b) an array of eights, or (c) an array of random digits. In a preliminary experiment, target and m...

Introduction: One of the most important jobs of an anesthesiology is to preserve an adequate gaseous exchange. With the coming in the 80’s of the laryngeal mask airway, a less invasive technique was introduced for this end. There are a lot of variants of these supraglotic issues, being the i-gel a no inflate mask; witch principle is to provide a perilaryngel stamp that reduced the incidence of ...

OBJECTIVE To investigate the compressive force applied to the head during mask ventilation and determine whether this force increases in response to an attempt to correct the mask leak. METHODS The authors asked 24 participants (consultants, fellows and nurses) to administer positive pressure ventilation to a modified leak-free, term newborn manikin using a self-inflating bag (SIB) and a Neop...

1. Yaddanapudi LN, Kashyap L, Mallick A. Hypoxaemia and insertion of the laryngeal mask airway. British Journal of Anaesthesia 1992; 69: 661. 2. Gillies GWA. Hypoxaemia and insertion of the laryngeal mask airway. British Journal of Anaesthesia 1992; 69: 661. 3. Haynes SR, Allsop GW, Gillies GWA. Arterial oxygen saturation during induction of anaesthesia and laryngeal mask insertion: a prospecti...

We have compared in 25 patients ease of placement of the conventional and intubating laryngeal masks while the patient's head and neck were stabilized by a manual in-line method, in a randomized, crossover study. After induction of anaesthesia and neuromuscular block, the masks were placed in turn. Adequacy of ventilation and ease of placement (using a 10-cm visual analogue scale (VAS)) were as...

We present a method for projecting arbitrary color images using a white light source and an optical device with no colored components—consisting solely of one or two prisms and two transparent masks. When illuminated, the first mask creates structured white light that is then dispersed in the prism and attenuated by the second mask to create the color projection. We derive analytical expression...

Using Foucault's (e.g., 1980) view on discourses and power, this Critical Discourse Analysis study examines how power circulates through material-discursive practices in IS development projects. The findings of this study indicate that one of the key power practices in IS development projects is what we call the 'guaranteeing of equality and rationality' – it sets up the technical-rational idea...

When implementing a pyramid scheme on a computer, it is not possible to use the exact values of the terms of the reenement mask if some are irrational. The irrational terms must be perturbed. When this is the case, it is important to know that the pyramid scheme associated with the perturbed mask converges and that the limit function is close to the solution of the original reenement equation. ...