BUCKBERG, GERALD D., JOHN C. LUCK, D. BRUCE PAYNE, JULIEN I. E. HOFFMAN, JOSEPH P. ARCHIE, AND DAVID E. FIXLER. Some sources of error in measuring regional blood flow with radioactive microspheres. J. Appl. Physiol. 3 l(4) : 538-604. 197 1 .-Radioactive microspheres (8-50 p diameter) distribute in proportion to regional blood flow so that their concentrations in all arteries should be similar b...

Airway management is one of the most essential skills in the practice of anesthesiology and inability to secure the airway is one of the most common reasons for major anesthesia-related complications. By far the most important recent contribution to airway management has been the introduction of the Laryngeal Mask Airway (LMA) into clinical practice. The LMA was conceived and designed by Dr. Ar...

Hubel and Wiesel (1962) proposed that complex cells in visual cortex are driven by a pool of simple cells with the same preferred orientation but diierent spatial phases. However, a wide variety of experimental results over the past two decades have challenged the pure hierarchical model, primarily by demonstrating that many complex cells receive monosynaptic input from unoriented LGN cells, or...

Perhaps the most important 'decision' made by any animal (or plant) is whether to disperse--leave kith and kin, or remain with the familiar and related. The benefits of staying at home are obvious, so dispersal requires an explanation--and the most popular is that dispersal functions to avoid inbreeding depression. Strong support comes from the observation that dispersal is so often sex biased....

rolling-based seismic isolation systems, in which rollers of circular or non-circular section are used, are less expensive and easier to manufacture. however, this type of isolation suffers from either lack of restoring or re-centering capability, or weakness against uplift forces. to resolve the first shortcoming the use of elliptical as well as pillow-shape rolling parts has been suggested, a...

the edge detour index polynomials were recently introduced for computing theedge detour indices. in this paper we nd relations among edge detour polynomials for the2-dimensional graph of tuc4c8(s) in a euclidean plane and tuc4c8(s) nanotorus.

le mouvement transversal de la locomotive ou des wagons , appele ie lacet, provient de deux causes principales: -la conicite des bandages -les irregularites de la voie dans ie plan horizontal. on se propose ici d'etudier la premiere cause , ce qui nous conduit a une equation differentielle non lineaire du deuxieme ordre. • l'equation en question est etudiee dans plusieurs cas difftten...