I had AHA training last year, and they were teaching head tilt/chin lift for opening airways except when there might be a spinal injury (car accident, fall from a height, neck clearly at a funny angle, or generally any trauma where we didn't see what happened). They taught the jaw thrust for those cases.
I'm not sure about that approach. The general mindset of the training was to learn procedures by rote, making as few decisions as possible, because dithering over whether there might be a spinal injury does not help open the airway. Seems like a single well-practiced technique would be more useful than two methods and a delicate judgment call.
Julie L.: That does make more sense. Celebrimbor, besides being dead, was an ally of the Dwarves of Khazad-dum. ("The doors of Durin, lord of Moria. ... I, Narvi, made them. Celebrimbor of Eregion drew these signs." And "these signs" include emblems of the houses of Durin and Feanor.) He never lived in Doriath, and a few years after the Dwarves sacked it, Celebrimbor's father went and sacked it again.[0]
(Whereas Celeborn did live there, and was Thingol's nephew or something, and is the poster boy for Sindarin anti-Dwarf discrimination even by the time of LOTR.)
[0] I always found it funny that when the Silmaril gets to Doriath the sons of Feanor are all over it, and again when it's taken to Arvernien, but they never even considered taking it off Luthien during the 50 years or so that she wore it. Sure, they'll pursue with vengeance and hatred to the ends of the world, etc.--but they're not that stupid.
[delurking for a moment]
Level 3 safety doesn't allow animals to be housed in outdoor cages, or outdoor anything. CDC sez:
"The animal facility is separated from areas that are open to unrestricted personnel traffic within the building. Access to the facility is limited by a self-closing and self-locking door. This exterior entry door may be controlled by a key lock, card key, or proximity reader. Entry into the animal room is via a double-door entry which includes a change room and shower(s). An additional double-door access (air-lock) or double-doored autoclave may be provided for movement of supplies and wastes into and out of the facility, respectively. Doors to animal rooms open inward and are self-closing."
-- Biosafety in Microbiological and Biomedical Laboratories, 4th ed.
I would guess that the outdoor cages were for the (much larger) population of healthy animals. At least we assume they're healthy. CDC again: "Nearly 100% of captive macaques >= 2.5 years of age were seropositive for [herpes B] virus, whereas ~20% of animals < 2.5 years of age were seropositive. On a given day, 2% of one group of seropositive rhesus monkeys shed B virus."
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