Mask ventilation is lifesaving, especially in cases of difficult intubation. Many publications have offered distinct techniques for optimizing mask ventilation. This article reviews currently available difficult mask ventilation literature and theory. We divide difficult mask ventilation into 3 broad categories based on etiology: inadequate mask seal, increased airway resistance, and decreased ...

The mathematical problem discussed is important for generating test cases in order to debug floating point adders designs. Floating point numbers are assumed to be written as strings of {0, 1} bits, in a format compatible with IEEE standard 754. A mask is a string of characters, composed of {′0′,′ 1′,′ x′}. A number and a mask are compatible if they have the same length and each numerical chara...

abstract background: sleep is one of the basic human needs and sleep deprivation causes numerous undesirable effects on the human body and mind, especially in the intensive care unit (icu) patients. it seems that noise and light are important environmental factors interrupting sleep in these patients. this study was carried out to determine the effect of earplugs and eye mask on iranian patient...

post-operative sore throat is one of the most common complications and complaints of patients after general anesthesia especially in operations that need endotracheal intubations. its causes are: size of endotracheal tube and type of its cuff, inadequate airway humidification, trauma during intubation and suctioning, high flow of inspiratory gases, surgical manipulation of airway and adjacent o...

Wearing a face mask affects the speech production. On top of that, the frequency response and radiation characteristics of the face mask depending on the material and shape of the mask adds to the complexity of analyzing speech under face mask. Our target is to separate the effect of muscle constriction and increased vocal effort in speech produced under face mask from sound transmission and ra...

Mask Aligners are used in the Semiconductor Industry to transfer structures with moderate resolution requirements onto substrates. With the casting of the shadow a photochemical reactive resist is exposed. As diffraction appears at the mask structures the exposure wavelength and the proximity gap between mask and wafer influence the quality of the image in the resist. As both parameters are ver...

This paper presents the mask method (MASK), a new population-based, evolutionary search procedure for nd-ing models for satissability problems (SAT). In this method, a partial truth assignment for a given boolean expression containing N variables is represented by a partially instantiated 0/1 string with N positions (called mask), with each position coding one variable. The mask method begins w...

In this paper, initially, the impact of mask spoofing on face recognition is analyzed. For this purpose, one baseline technique is selected for both 2D and 3D face recognition. Next, novel countermeasures, which are based on the analysis of different shape, texture and reflectance characteristics of real faces and mask faces, are proposed to detect mask spoofing. In this paper, countermeasures ...

Four-dot masking with a common onset mask was recently demonstrated in a fully attended and foveated target (Filmer, Mattingley & Dux, 2015). Here, we replicate and extend this finding by directly comparing a four-dot mask with an annulus mask while probing masking as a function of mask duration, and target-mask separation. Our results suggest that while an annulus mask operates via spatially l...

This thesis reports an automatic method for synthesizing MEMS mask-layouts. This method incorporates a forward simulation of fabrication into a general evolutionary algorithm loop. An initial random population of mask-layouts is generated. The fabrication of each layout is simulated through a digital process simulator to produce a 3D fabricated shape, which is compared to a user-specified desir...