Duck and cover

Although government officials attempted to educate the public and military personnel about atomic civil defense, in retrospect these efforts seem hopelessly naive if not intentionally misleading. Army training films advised soldiers to keep their mouths closed while obser"ving atomic test blasts in order to not inhale radioactive flying dirt. Civil defense films used a friendly animated turtle to teach schoolchildren to duck and cover during a nuclear attack—that is, duck under their desks and cover their heads. Such measures, of course, would have offered pitiful protection to those in the blast zone. 

To help teach schoolchildren how to react during an atomic bomb attack, in 1950 the Office of Civil Defense—a federal agency charged with emergency preparedness—created a cartoon character named Bert the Turtle. Bert s job was to convince schoolchildren they could actually survive an atomic blast. Bert appeared in animated films as well as pamphlets and other printed literature, giving lessons to young people on how to duck and cover when the bombs start falling. 

Each of the items covered as Good Intentions showed a flaw in judgment. None of the principleN were unique and no decision was so urgent that the change needed to be accomplished immediately. All technical plant employees could easily understand the problems after they occurred and most of the technical employees could have spt)tted the weaknesses prior to the incident, if they had been afforded the opportunity for a well-disciplined review (see Chapter 10). Happily there were no significant injuries reported in these accidents, which caused more than 1 million of losses. However, wo don t know about the ducks. And yet, some accidents resulting from similar moditications have caused injuries and even deaths. 

On September 18, 1783, living creatures other than birds or insects became airborne for the very first time, carried aloft in a balloon of paper-covered canvas. Suspended beneath the balloon, the brainchild of brothers Joseph-Michel and Jacques-fitienne Montgolfier, was a wicker basket sturdy enough to carry three passengers a sheep, a duck, and a rooster. 

The enemy s henchman has got you in his sniper scope, and you re in an open area with no place to duck for cover. The way you discover you re doomed is that he s tapped into an ear microphone you ve been using as part of a communications system, and he taunts you. 

Things will be knocked down all over town, and, as in a big wind ate blown through the air. So, like Bert, you DUCK to avoid the things flying through the air... and COVER to keep from getting cut or badly burned. 

Acryhcs and modacryhcs are also useflil industrial fibers. Fibers low in comonomer content, such as Dolan 10 and Du Font s PAN Type A, have exceptional resistance to chemicals and very good dimensional stabihty under hot—wet conditions. These fibers are useflil in industrial filters, battery separators, asbestos fiber replacement, hospital cubical curtains, office room dividers, uniform fabrics, and carbon fiber precursors. The exceUent resistance of acryhc fibers to sunlight also makes them highly suitable for outdoor use. Typical apphcations include modacryhcs, awnings, sandbags, tents, tarpauhns, covers for boats and swimming pools, cabanas, and duck for outdoor furniture (59). 

I couldn t reply, just went on staring. He shone. The sun touched glossy curls, flushed cheeks, and silver buttons. Warmth spilled out of his eyes. He raised his brows, but I still couldn t speak. Instead, I turned and walked toward the library. He and the scorching light followed, so that between them they burned the back of my dress. In the library, I pointed with my bloody hand to a chair by the window, ducked under the curtain covering the door to the laboratory, and told my father that a stranger had come. 

Armor pads can be designed to hang over the inside of car doors,drape overseat backs or even hang from the tops of door frames to serve as removable window curtains.Pads should be enclosed in canvas or cotton duck covers to add stability and prevent dirt and abrasion damage. 

In the examples above, (a) was what we call a continuous object in that it was composed of a continuum of points covering a defined area, namely a square or the surface of a duck. The diffraction patterns were similarly continuous. Molecules, however, are not really continuous they are composed of atoms, which serve as discrete scattering points. In Figure 1.6, for example, we have an arbitrary distribution of scattering points, like atoms in a molecule, and in (b) we see the diffraction pattern of the atom set. Note that even though the object is composed of unique scattering points, the diffraction pattern is still more or less continuous. Thus we should expect the diffraction pattern of a single molecule to be continuous, even if the molecule itself is not. 

Adenoviruses were discovered in cultures of human adenoids in 1953 by Rowe et al. [24] and have since then been implicated in several respiratory, ocular, and gastrointestinal human diseases [25, 26]. Nonhuman adenoviruses have also been found in many other mammalian (dogs, horses, sheeps, chimpanzees, etc.) and nonmammalian (ducks, fowl, geese, etc.) species [26]. Overall, more than 100 members have been included in the Adenoviridae family. This section will only give a brief description of the major characteristics of the adenovirus and its vectors because this topic has been covered in depth in several recent reviews [26-31]. 

The major animal-derived products can be divided into edible and nonedible red meat products, milk and milk products, poultry and e products, and wool and mohair. Edible red meat products primarily come from cattle, swine, sheep, goats, and animals such as horses and Asian or African bufialo. The major nonedible red meat products include rendered fet, which is used to make soap and formula animal feeds bone meal, which is used in fertilizer and animal feeds manures used as fertilizers and hides and skins, which are tanned and used to make leather products. Milk and milk products (also known as dairy products) are produced primarily by dairy cattle and include whole milk, evaporated and condensed milk, cultured milk products, cream products, butter, cheese, and ice cream. Poultry (chickens, turkeys, ducks, geese, pigeons, and guinea hens) and egg products are nutritious, relatively inexpensive, and used by humans throughout the world. The hair covering the skin of some farm animals (wool and mohair) is also considered an agricultural product. 

The level at which a duck floats on water is determined more by the thin oil film that covers its feathers than by a body density that is lower than the density of water. The water does not mix with the oil, and therefore does not penetrate the feathers. If, however, a few drops of wetting agent are placed in the water near the duck, the poor duck will sink to its neck. State the effect of a wetting agent on surface tension and intermolecular attractions of water. 

Dewetting of macroscopic films is a process very frequently found in everyday fife for example, the film that covers a duck when it leaves a water pond, immediately dewets forming big droplets which fall by gravity. In that way, the duck looks dry and clean. 

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