Search results for "Concave" - New World Encyclopedia

convex, (pushed out) but is actually concave (pushed in).]] illusion in which the perception of a concave mask of a face appears as ...

spot. For a diverging lens (for example a concave lens), the focal length ... surface is convex, and negative if it is concave. The value of R2 is positive ...

in and out" between a convex cube and a concave "corner." This corresponds to the two possible orientations of the coordinate system ...

through the action of the drum against the concave, a shaped "half drum ... the sieves. The straw exits the top of the concave onto the straw walkers. ...

A spoon lure is, in sport fishing, an oblong, concave metal piece ... of the spoon lure is simple; an oblong, concave metal piece with a shiny ...

*Roman tiles - flat in the middle, with a concave curve at one end ... laid in alternating columns of convex and concave tiles. ...

*Concave: Non-convex and simple. polygon must be simple, and may be convex or concave. * Self-intersecting: ...

fin. The anterior spines are much longer, giving a concave outline to the spiny part of the dorsal fin. The bigeye tuna (Thunnus obesus) also have extremely ...

lotuses.” Bound feet would bend, becoming so concave they were sometimes described as "lotus hooks." The binding process caused intense ...

with a diameter of five feet. The ball sits in a concave foundation. If an earthquake occurs, the ground can move up to 20 inches in any direction, ...

believed to have discovered the benefits of concave lens in the treatment of myopia (nearsightedness). However, it was not until 1604 that Johannes Kepler ...

The hind end of the caudal fin is forked or concave. It is set at the end of a stout peduncle. The pectoral fins are placed low down on the sides ...

than at the edges (that is, it would be a concave meniscus). In a situation ... :* \scriptstyle \theta is the contact angle, where a concave meniscus ...

has been described as crescent-shaped, lunate, or concave. ... 1953). The end of the caudal fin is concave, not rounded. It lacks dorsal ...

A simpler system, developed later, uses a concave disc (or a pair of them) set at a large angle to the direction of progress, that uses the concave ...

*Negator spring - a thin metal band slightly concave in cross-section. When coiled it adopts a flat cross-section but when unrolled it returns ...

fur and having a noticeable shoulder hump and a concave face. The most widely distributed member of the bear family, Ursidae, it is found in much of ...

spaces which emphasize the convex and concave aspects of the body, at ... through the body in order to explore the concave and convex shapes. These ...

of most such gears is that the tooth tops are concave, so that the gear partly envelopes the worm. A further development is to make the worm concave ...

placing them on the index finger with the concave side upward and raising ... plungers made of flexible plastic; the concave end is raised to the eye ...

rake with spatula; root hook; coir brush; concave cutter; knob cutter; wire ... of bonsai. The most common tool is the concave cutter, a tool designed ...

the cut ends will have dried and gone slightly concave. When selecting asparagus, care must be taken to choose stalks that are not too long, more ...

(with the embryo's ventral surface becoming concave) in two directions: the sides of the embryo fold in on each other and the head and tail fold ...

plan. It is circled by alternating concave and convex-ending cornices, and leads to a dome decorated with linear arrays of stars and putti. The ...

than its length, and the slipface is on the concave side of the dune. These dunes form under winds that blow from one direction, and they are also ...

of the Smolensk offensive, showing the concave shape of the Soviet front line]] of the Eastern Front was described as a concave with a re-entrant centered ...

convex, but in the closed state, the lobes are concave, forming a cavity. It is the rapid flipping of this state that closes the trap, but the mechanism ...

up from the sea with a perfect-circle smooth concave crater, and the lava tube caves, together with golf, horseback riding, fishing, and modern ...

*Niccolò Zucchi, Jesuit inventor of the concave reflecting telescope *Salvadoran Archbishop and martyr Óscar Romero *"The last Renaissance ...

and of relative motion. He was the first to use concave lenses to correct myopia, and conducted the first modern formal biology experiment, concluding ...

arched on the aboral side (dorsal) and flat or concave on the oral side (ventral). Common colors include black and dull shades of green, olive, brown ...

of rainbow as an image, which forms at a concave mirror. If the rays of light coming from a farther light source reflect to any point on axis ...

such as high and low, up and down, convex and concave, light and shadow, movement and tranquility, dynamic and static, as a manifestation of the yin ...

the images formed in plane and spherical concave mirrors. All of these works follow the basic logical structure of the Elements, containing definitions ...

would be exerted by the Moon on the lower concave surface of the lunar orb ... the stars highest, but the spheres were concave upwards, centered on God ...

* String mires: Flat or concave peatlands with a string-like pattern of hummocks (hence the name), found principally in northern Scandinavia ...

they are long. The slipface is on the dune's concave side. These dunes form under winds that blow from one direction, and they also are known as ...

symbols for silver is a crescent moon with the concave part on the left (see diagram on the left). The metal mercury was once thought of as a ...

optics; that is they used a convex objective and a concave eyepiece lens. The Galilean design has the advantage of presenting an erect image but has ...

family, to be illustrated by downward concave curve, i.e. such that rises up quickly from the origin—0-point on the intersection of the horizontal ...

for the east front of the Louvre; his adventurous concave-convex facades were discarded in favor of the more stern and classic proposals of native Claude ...

went from being biconcave to having a concave front and a convex back in the modern forms. This made the vertebral column more flexible and strong ...

cairns and those with stone chambers have concave forecourts which are reminiscent of those that had been built earlier of wood (Haddenham and ...

unique among petroglyphs. They consist of a concave depression, no more than a few centimeters across, pecked into a rock surface and often surrounded ...

images are nearly inexhaustible: anything hollow, concave or containing, such as bodies of water, the earth itself, caves, dwellings, and vessels of ...

*Profile — convex slopes are statistically more dangerous than concave. The reasons lie partly in human behaviour, and the tensile strength ...

making lenses, with surfaces that are convex, concave, planar, or a combination of these types. Depending on its shape, a lens can concentrate or diverge ...

use of solar power, by employing concave mirrors to heat water. While most of Leonardo's inventions were not built during his lifetime, ...

small bronze cauldrons, one globular and one concave-sided, a 'crested' and masked helmet, wrapped in cloths, a set of spears, tips uppermost ...

to it as well lending it the vague appearance of a concave lens as viewed from downstream. The multiple-arch dam consists of a number of single ...

printed type or a design. The impression may be concave or convex. *Reprographics is a general term covering copying and duplicating. In-house ...

presence of temperature gradients and/or convex and concave surfaces within individual crystals (causing differential vapor pressure). This causes the ...

two upper bouts, two lower bouts, and two concave C-bouts at the "waist," providing clearance for the bow. The "voice" of ...

was in the vicinity of the Wayaanag-gakaabikaa (Concave Waterfalls, Niagara Falls). At their "third stopping place" near the present-day city ...

von Westfalen. When the intrados has multiple concave segments, the arch is also called a draped arch or tented arch. Nikolas Davies and Erkki ...

," or "How did the convex and concave margins of the Alpine chain form?," any true insight was hidden by complexity that boiled ...

larger than the Asian elephant and has a concave back. Both African males and females have external tusks and are usually less hairy than their ...

in shape from the more traditional cuts in its concave surfaces and angles and resembles a 4-pointed star. ====Shape==== Diamonds do not show ...