108 Sentences With "corrugations" | Random Sentence Generator

Documenting these relics helped the team replicate the amplitude and frequency of the corrugations.

Other paintings contain miasmic and diaphanous corrugations that resemble topographical desert maps, or bisected cellular tissue samples magnified under an enormous microscope.

" It's an adventure that will trace the "Crystal Highway," named for all the broken windscreen glass scattered along the verges on a road of "rough conditions, corrugations, bulldust, bone-breaking rock" and, in calmer moments, "the hypnotic undulations of the blacktop.

There are two types: intermating and chevron corrugations. In general, greater heat transfer enhancement is produced from chevrons for a given increase in pressure drop and are more commonly used than intermating corrugations.

Washboarding can also occur when graders exceed recommended speeds during the construction or maintenance phase causing the blade to bounce on the surface creating a pattern of widely-spaced corrugations. Corrugations from washboarding can become severe enough to cause vibration in vehicles so that bolts loosen or cracks form in components. Proper grading is needed to remove the corrugations, and reconstruction with careful choice of good quality gravel can help prevent them reforming. Additionally, installing a cellular confinement system will prevent the washboard-like corrugations from occurring.

This "cold forges" the leaf. The aluminium leaf was then annealed for an hour in an oven to restore flexibility. Corrugations must also be imparted into the ribbon: Coles used 25 per inch (1 mm cycle). RCA 44BX has 19 corrugations per inch (0.7 mm cycle) and is around long; RCA 77 has 13 corrugations per inch (0.5 mm cycle).

These muddy-looking scorpions are characterized by corrugations on the last sternite, stiff hairs (setae), and highly recurved tarsal claws. Males have corrugations on the last two sternites. They grow up to 70 mm in length.

The corrugations increase the bending strength of the sheet in the direction perpendicular to the corrugations, but not parallel to them, because the steel must be stretched to bend perpendicular to the corrugations. Normally each sheet is manufactured longer in its strong direction. CGI is lightweight and easily transported. It was and still is widely used especially in rural and military buildings such as sheds and water tanks.

However, FAC tubing is made only in lengths of 1 to 6 feet, FAC tubing is made with connectors on each end, and FAC tubing does not have a plastic sheath. On FAC tubing the corrugations are visible. CSST's plastic sheath covers its corrugations.

500px In 1877 Fox lodged a patent for his Corrugated Furnace. This was a tube (initially iron, later steel) heated and swaged (rolled) under pressure to form corrugations. This increased the surface area of the tube, allowing more energy to transfer from the fire to the boiler. The corrugations also provided additional strength to resist boiler pressure.

In flat ties, this can be a twist. In wire ties, this can be corrugations formed in the wire or again a twist.

The 30-km wavelength spiral corrugations first seen in the D Ring were observed during Saturn's equinox of 2009 to extend throughout the C Ring (see above).

It requires energy both to move fluid out of the valleys and up into the spikes, and to increase the surface area of the fluid. In summary, the formation of the corrugations increases the surface free energy and the gravitational energy of the liquid, but reduces the magnetic energy. The corrugations will only form above a critical magnetic field strength, when the reduction in magnetic energy outweighs the increase in surface and gravitation energy terms. Ferrofluid simulations for different parameters of surface tension and magnetic field strengths Ferrofluids have an exceptionally high magnetic susceptibility and the critical magnetic field for the onset of the corrugations can be realised by a small bar magnet.

Dorsal surface of head and body covered possess corrugations. Glandular warts are white-tipped. Finger tips round and enlarge without adhesive discs. Webbing on fingers and nuptial pads absent.

Uragan-2M is a medium-sized stellarator with reduced helical corrugations. The unit has a torus radius of , a plasma radius of up to , and a toroidal magnetic field of up to .

In 2003, Showalter and Jack J. Lissauer discovered two new moons of Uranus (Mab and Cupid) in Hubble Space Telescope images. In 2006, they announced the discovery of two very faint rings, the μ and ν rings, within the same data. In 2010, Showalter discovered that spiral vertical corrugations in Jupiter's rings were caused by the impact of Comet Shoemaker–Levy 9 in July 1994. A second smaller set of corrugations appear to be consistent with an unknown impact in early 1990.

Ride quality refers to a vehicle's effectiveness in insulating the occupants from undulations in the road surface (e.g., bumps or corrugations). A vehicle with good ride quality provides a comfort for the driver and passengers.

Properties of the grain include hardness and moisture content. The milling process affects particle size based on the mill equipment type used, and some properties of the mill equipment (for example corrugations, gap, speed, and energy consumption).

There are numerous articles on the Internet about this whistle, and it has been studied in academic literature.Lisa R., Taylor, M. E., "Experimental Study of the Acoustical Characteristics of Corrugated Tubing", Noise and Vibration Control Laboratory, Stevens Institute of Technology, Thesis, 1994. The characteristic speed is the mean flow U through the pipe and the characteristic length must be a multiple of the spacing L between corrugations, nL, where n is an integer number. At low speeds, the unstable interior flow needs to travel several corrugations to establish the feedback loop.

As with the Lancashire boiler, the furnace was often corrugated for strength. Various makers had their own particular ways of making these corrugations, leading to their classification for maintenance purposes under the broad titles of, Leeds, Morrison, Fox, Purves or Brown.

Once the beads are broken the vinyl will be firmly adhered to the substrates surface. Proprietary company blends of polymer in the vinyl allowed the material to conform to compound curves, recesses, and corrugations through the use of heat guns and torches.

Ed: J. Čejka, H. van Bekkum. Adjacent layers of the sheets are related by an inversion point. The estimated pore size of the channel running parallel with the corrugations is 5.4–5.6 Å.Modeling of Structure and Reactivity in Zeolites (1992). Ed: C.R.A. Catlow.

This mat has a solid surface, strengthened by corrugations that also encouraged the drainage of rainwater. The mat size also changed to be . Later mats were developed in a lightweight aluminum version, . This was made as a hollow extrusion, rather than pressed.

The waffle-iron filter was invented by Seymour B. Cohn at Stanford Research Institute in 1957.Young, p.10 The basis for the filter is the corrugated-waveguide filter. This consists of a series of ridges, or corrugations, across the width of the filter.

The coin has the same design as 50 rubles Saint George the Victorious coins (except denomination on the obverse) but greater diameter and thickness. There are 240 corrugations on the edge of the coin (134 corrugations are on the edge of 50 rubles coins). The coin is also minted in proof quality. Higher prices (10-20% over uncirculated competitors of the same gold content), low mintages (10 thousand pieces of each denomination were issued) and a special care of proof coin handling turn Gold Saint George the Victorious in proof quality coins into numismatic items (commemorative coins) rather than means of a straightforward investment in gold coins.

Under a 1906 patent H.C.J. Deeks & Co marketed a Puzzle Post Card or Photochange Post Card. In 1907 a Colorchange Post Card followed, featuring identical pictures on each side of the corrugations that were sprayed with different "liquid pigment or coloring matter" on (parts of) each side.

The frontal third of the hull sides is covered by heavy ballistic skirts, while the rest of the hull sides is covered by steel-reinforced rubber skirts. For increased protection against mines, the sides of the hull floor are sloped by 45° and the floor is reinforced with corrugations.

In violent collisions, the buffers of adjacent carriages may become displaced relative to one another, allowing the carriages to telescope which is very dangerous. The risk of this can be reduced if the buffers (or fake buffers) have corrugations that grip each other and prevent the buffers becoming displaced and so leading to telescoping.

This effectively extended the first concept to now use a conical resonator with corrugations at its edge, allowing a more 'rigid' diaphragm. His failure to register his inventions in the USA allowed John Dopyera and Geo Beauchamp to subsequently obtain US patents for the tricone and single cone designs used in National brand instruments.

The product is named as an analogy to the ruffle, a strip of fabric sometimes gathered, creating folds. Its longtime official product slogan is "RRRuffles Have Ridges!" The ridged corrugations are designed to create a sturdier, crunchier potato chip less prone to breakage in the bag, as well as standing up to stiffer dips.

Wrought iron CGI was gradually replaced by mild steel from around the 1890s, and iron CGI is no longer obtainable but the common name has not been changed. Galvanized sheets with simple corrugations are also being gradually displaced by 55% Al-Zn coated steel or coil-painted sheets with complex profiles. CGI remains common.

Nature Communications, 8, 2289. doi: 10.1038/s41467-018-04583-0 (2018). Jeofry, H., Ross, N., Le Brocq, A., Graham, A., Li, J., Gogineni, P., Morlighem, M., Jordan, T., and Siegert, M.J. Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. Nature Communications, 9, 4576 doi:10.1038/s41467-018-06679-z (2018).

A reinforced series of tubes, these can withstand up to of pressure To achieve a better pressure resistance, hoses can be reinforced with fibers or a steel cord. Commonly used reinforcement methods are braiding, spiraling, knitting and wrapping of fabric plies. The reinforcement increases the pressure resistance but also the stiffness. To obtain flexibility, corrugations or bellows are used.

In 1929, it became possible for the first time to produce metal bellows. These were also developed by Albert Dreyer of Lucerne, but independently of Witzenmann. Metal bellows are created by rolling annular corrugations into a smooth extruded or welded pipe. In 1946, Albert Dreyer developed a multi-walled joint that was designed to accommodate axial movements as well: the axial expansion joint.

The corrugations run chordwise, rib-like, in the wings and tail and circumferentially in the fuselage. The tail structures have a foam plastic core. It is powered by a flat 4-cylinder, 200 hp (150 kW) Lycoming IO-360 engine and has a tricycle undercarriage with inward retracting main legs and an aft retracting nosewheel. The first flight was on 29 March 1968.

The shell is thick and characterized by strong corrugations and is more circular than other American abalones. The two to four open respiratory apertures have edges that are strongly elevated above the surface of the shell. These holes collectively make up the selenizone, which forms as the shell grows. The epipodium is a “ruffle” of tissue along the side of the foot.

The shell of Scenella is elongated along its anterior-posterior axis, and comprises concentric rings around a conical central peak. Radial and concentric corrugations exist in some species. Some specimens are preserved as organic films, others appear to have been infilled with calcite. They are usually preserved point-upwards, with their long axes consistently oriented; this probably represents their most stable position under their depositional current.

Fruits are obovate to oblong-obovate, 5–7 cm long, with diameter of 3–4 cm, averaging 26 g in weight; their skin is rather thick, lemon-yellow, fairly smooth or with transverse corrugations; the pulp is juicy, grayish and acid, while juice cells are short and blunt to long, long, slender and pointed, sometimes containing a minute, greenish nucleus. They have numerous flat, pointed, reticulate seeds.

These pulleys were produced by J & E Hall of Dartford. Plans were also made to develop this into a railway wheel, with the corrugations pressed into the shape of a half-torus. The first use for a road wheel was by Roy Fedden for his Cosmos car of 1919. This pressed steel wheel used a disc with six spokes on alternating sides and three retaining bolts.

The base of S. ichthystoma is usually found adhering to rocks or shells and is no wider than the column. This is cylindrical, purplish-red, and about as long as it is wide, covered with corrugations but without warts. It can retract into a nipple-shaped button. The disc is fawn and is slightly concave with an enlarged margin and clearly marked, black radii.

The almond (Prunus dulcis, syn. Prunus amygdalus) is a species of tree native to Iran and surrounding countries but widely cultivated elsewhere. The almond is also the name of the edible and widely cultivated seed of this tree. Within the genus Prunus, it is classified with the peach in the subgenus Amygdalus, distinguished from the other subgenera by corrugations on the shell (endocarp) surrounding the seed.

It consists of about of washaways, heavy corrugations, stone, sand and flood plains. The Gunbarrel Highway connects Victory Downs in the Northern Territory to Carnegie Station in Western Australia. Some sources incorrectly show the highway extending west to Wiluna. The road was built as part of Australia's role in the weapons research establishment called Woomera which included Emu Field and Maralinga, both atomic bomb testing sites.

Corrugations give the door strength against impacts. A typical single car garage roller door has a preloaded spring inside the rolling mechanism. The spring reduces the effort required to open the door. Larger roller doors in commercial premises are not sprung (except USA) and use a manual pulley and chain system or a geared motor to raise and lower (roll up and roll down) the door.

The opening flares out, strengthened with corrugations around the rim, which has a separate tubular binding. Two ring handles are attached to riveted straps. As a large vessel for preparing food or drink, it may have been used for communal feasts, and has the patches and repairs from use over an extended period, perhaps several generations. It may have been deliberately placed in the river as a religious sacrifice.

The first wobbly web wheel was a design for a pulley centre, circa 1884. A straight strip of steel, with width the radius of the wheel, was folded into sharp corrugations. This accordion pleat was then fanned into a circle, the inner folds being closer than the outer. This disc was then cast into an iron hub and folded tabs on the outside of the sheet riveted to the pulley rim.

There are corrugations inside the waveguide on both the top and bottom surfaces. The rising and descending ridges are aligned with each other but do not meet in the middle; there is a gap in between. In the waffle-iron filter there are, in addition, slots cut through the ridges down the length of the waveguide. This leaves a matrix of square islands, or teeth, on the top and bottom surfaces.

The sides and top of the hull used sheet metal with widely spaced corrugations or ribs. There were five bulkheads separating six watertight compartments, and it made extensive use of stainless steel components to limit corrosion. The roomy 4 seat cabin was positioned ahead of the front wing spar and was accessed through a folding roof hatch. Dual controls were offered, while the stick could be removed on the passenger side.

320.5 km of 571 km from Lakeland to Weipa is currently unsealed road (as of March 2016). The condition of the unsealed road is highly variable. Mud, sand, dust, gravel and dirt corrugations are some of the road conditions subject to change of weather conditions. A five-year program of sealing work joint funded by the Federal and State governments through the Cape York Region Package commenced in 2014.

Corrugated images that change when viewed from different angles predate the development of lenticular printing. Tabula scalata or "turning pictures" were probably known since the late 16th century. Extant double paintings, with two distinct images on a corrugated panel, are known from the 17th century. H.C.J. Deeks used a similar technique with minute vertical corrugations pressed into photographic paper and then exposed to two different images from two different angles.

The road is a single track for the most part, carrying two-way traffic, so care is required at corners. The road is unsealed, which tends to be dusty in summer, but is kept in sufficient condition for 2WD vehicles. There are numerous corrugations, but there are no fords on the Acheron Road, and the gradients are not steep. Users of rental vehicles are advised to check insurance implications.

The adult leaves are arranged alternately, thick, the same glossy green on both sides and lance-shaped to curved. They are long and wide on a petiole long. The flower buds are arranged in groups of three in leaf axils on a peduncle long, the individual buds on a pedicel long. Mature buds are pear-shaped to more or less spherical, long and wide with prominent corrugations along the side.

Figure 10. Corrugated waveguide filter with cutaway showing the corrugations inside Figure 11. Longitudinal section through a corrugated waveguide filter Corrugated- waveguide filters, also called ridged-waveguide filters, consist of a number of ridges, or teeth, that periodically reduce the internal height of the waveguide as shown in figures 10 and 11. They are used in applications which simultaneously require a wide passband, good passband matching, and a wide stopband.

Later wind tunnel tests showed the corrugations doubled the wing's drag, reducing the Racer's top speed by . Behind the engine the fuselage was a laminated spruce monocoque with an open cockpit aft of the wings faired rearwards into an integral fin with a rectangular rudder. A mid-fuselage mounted, wire-braced tailplane carried divided elevators. Each long and wide plywood float had a concaved V-bottom, with a single step back from the nose.

This fossil has the form of a rounded shield, enclosing strongly concentric corrugations or ribs, which weaken adjacent to a triangular neckline. A suture-like zone extends through the center from the apex of the neckline towards the opposite margin. The ribs become wider towards the periphery. The symmetry of these ribs exhibits glide reflection (opposite isometry); that is, the corresponding segments on the left and right sides do not line up, but are offset.

The damage a vehicle causes is roughly proportional to the axle load raised to the fourth power, so doubling the weight an axle carries actually causes 16 times as much damage. Wheels cause the road to flex slightly, resulting in fatigue cracking, which often leads to crocodile cracking. Vehicle speed also plays a role. Slowly moving vehicles stress the road over a longer period of time, increasing ruts, cracking, and corrugations in the asphalt pavement.

Cohn's original data for the corrugated filter could also be applied to the waffle-iron with only a small adjustment of one parameter. An alternative approach to using Cohn's empirical data, but still an image parameter design, is due to Marcuvitz who used a waveguide T-junction equivalent circuit to represent corrugations and this method was later extended by others to waffle-irons.Cohn, pp.651–656 Marcuvitz, pp.336–350 Matthaei et al.

The route is mostly unpaved and marked by corrugations, deep potholes and bulldust (fine red desert dust). However, in 2009 further development in the form of river crossings were initially attached and further parts of the road are paved. Despite the improvements to the track, it is often impassable after heavy rain. The Donohue Highway along its entire length forms part of the Outback Highway, which runs 2,800 km through central Australia.

The strong epidermis is dull,olive-brown with usually wide oblique greenish intervals. The sculpture begins as crowded spiral cords or lirae, but over the greater part of the body whorl these become nodose at short intervals, or are crossed by obliquely radiating corrugations. It is angled at the row of the holes. Below these there is a distinct spiral channel or furrow, bounded below by a more or less distinct row of nodules.

However, shock absorbers on six of the vehicles (5 civilian G 350 and 1 military models) were broken during their trip in the corrugations of Canning Stock Route in day 7. Mercedes-Benz Australia later arranged for the replacement shock absorbers to land in Perth, before transferring to a light plane destined for a remote Aboriginal settlement close to Well 33, about 1000 km from Wiluna. The parts would be delivered by the sole surviving vehicle, a G-Professional.

It would rise 945 m. Talk of a gondola has been around for some time, but has been re-ignited recently due to the deaths of three young Australian skiers when they drove off the access road in 2004. The access road is under regular criticism from patrons because of its corrugations, steep incline with tight switchbacks and lack of safety barriers. It also coincides with other objectives for the skifield, said Treble Cone director, Richard Hanson.

Corrugated hoses are used as economical, flexible connecting elements that permit movement, thermal expansion and vibrations, and that can be used as filling hoses. The starting material is a seamless or longitudinally welded, thin- walled tube into which corrugations are introduced by mechanical or hydraulic means using special tools. Corrugated hoses are absolutely leak-tight and are used to convey liquids or gases under pressure or as vacuum lines. They are also referred to as pressure hoses.

50-51 All AR-10s, whether produced by ArmaLite or by A.I., used the same Stoner-designed 20-round lightweight aluminum 'waffle' magazine with pressed-in, corrugated sides, intended to be discarded in combat once emptied.Pikula, p. 29: The 'waffle' (pressed-in corrugations) was designed to add additional rigidity to the light-gauge aluminum magazine body. Portuguese páraquedistas armed with AR-10 rifles disembark from an Alouette III helicopter during the Angolan War of 1961-1974.

In Australia and New Zealand particularly it has become part of the cultural identity, and fashionable architectural use has become common. CGI is also widely used as building material in African slums and informal settlements. For roofing purposes, the sheets are laid somewhat like tiles, with a lateral overlap of one and half corrugations, and a vertical overlap of about , to provide for waterproofing. CGI is also a common construction material for industrial buildings throughout the world.

At the least flow rate, the frequency of 2452 Hz compared favorably to n = 3\. At intermediate flow rates, several non-harmonically related frequencies occurred simultaneously, suggesting that several corrugations were involved in the sound generation. In the smaller metal tube, a predominant tone appeared at 6174 Hz and corresponded to n = 2\. A unique aspect of this whistle is that the internal flow carries both the unstable vortex downstream and the returning feedback signal upstream.

The nearby Lesser Gyzgala had extraordinarily thick walls with deep corrugations, as well as multiple interior stairways leading to second-story living quarters. All of Merv's kushks are in precarious states of preservation (Herrmann 1999). However, the most important of Soltangala's surviving buildings are Seljuk constructions. In the 11th century CE, the nomadic Oghuz Turks, formerly vassals of the Khwarazmshah in the northern steppes, began to move southward under the leadership of the Seljuk clan and its ruler Togrul Beg.

When grading or building the road, waterbars are used to direct water off the road. As an alternative method, humps can be formed in the gravel along the road to impede water flow, thereby reducing rutting. Another problem with gravel roads is washboarding — the formation of corrugations across the surface at right angles to the direction of travel. Narrow-spaced washboarding can develop on gravel roads due to inconsistent moisture levels in the gravel, poor quality gravel, and vehicular stress to the road.

A glass washboard The traditional washboard is usually constructed with a rectangular wooden frame in which are mounted a series of ridges or corrugations for the clothing to be rubbed upon. For 19th-century washboards, the ridges were often of wood; by the 20th century, ridges of metal were more common. A "fluted" metal washboard was patented in the United States by Stephen Rust in 1833. Zinc washboards were manufactured in the United States from the middle of the 19th century.

The internal narrow passages of the crimped corrugations make up the element matrix. These passages are measured as the hydraulic diameter and are made smaller for gases having smaller maximum experimental safe gaps (MESG). Under normal operating conditions the flame arrester permits a relatively free flow of gas or vapor through the piping system. If the mixture is ignited and the flame begins to travel back through the piping, the arrester will prohibit the flame from moving back to the gas source.

The Vickers- Wibault construction method was based on the patents of Michel Wibault, who began working with Vickers in 1922. It was a way of producing an all-metal aircraft with an airframe built up from simple, non-machined metal shapes, covered by very thin corrugated light alloy sheets. On the wings, the corrugations were aligned along the chord and longitudinally on the fuselage. The resulting fuselage was not monocoque but was internally braced and the skin on the wings was not stressed.

Dumbo was similar to KIWI/NERVA in concept, but used more advanced construction techniques to lower the weight of the reactor. The Dumbo reactor consisted of several large barrel-like tubes which were in turn constructed of stacked plates of corrugated material. The corrugations were lined up so that the resulting stack had channels running from the inside to the outside. Some of these channels were filled with uranium fuel, others with a moderator, and some were left open as a gas channel.

A furrow profilometer is used for the measurement of the cross-sectional geometry of furrows and corrugations, and is important in furrow assessments. For each furrow, the cross-sectional geometry should be measured at two to three locations before and after the irrigation. A profilometer for determining the cross-sections of furrows is shown in Figure. Individual scales located on the horizontal rod of the profilometer provide data to plot furrow depth as a function of the lateral distance and the data can be numerically integrated.

Through this research Dr. Mosher has discovered that the active tectonic environment is primarily made of breccia, sandstone and siltstone turbidity-current generated debris fans and that faulting, sedimentation and volcanism are merely a small part of plate boundaries. Another of her research projects focused on the partitioning of different types of strain during formation of ductile non-coaxial shear zones in both extensional and contractional environments, including the development of corrugations in metamorphic core complexes and the formation of rods and mullions in thrust nappes.

An illustrative cutaway of a typical waffle-iron filter design A waffle-iron filter is a type of waveguide filter used at microwave frequencies for signal filtering. It is a variation of the corrugated-waveguide filter but with longitudinal slots cut through the corrugations resulting in an internal structure that has the appearance of a waffle-iron. Waffle-iron filters are particularly suitable where both a wide passband, and a wide stopband free of spurious transmission modes, are required. They also have a high power- handling capability.

Inherent within this model, the following assumptions are valid specifically for the simplest case: the adsorption of a single adsorbate onto a series of equivalent sites on the surface of the solid. # The surface containing the adsorbing sites is a perfectly flat plane with no corrugations (assume the surface is homogeneous). However, chemically heterogeneous surfaces can be considered to be homogeneous if the adsorbate is attracted to only one type of functional groups on the surface. # The adsorbing gas adsorbs into an immobile state.

Citroën minivan with body made of iron sheets. A stack of new iron sheets The corrugations are described in terms of pitch (the distance between two crests) and depth (the height from the top of a crest to the bottom of a trough). It is important for the pitch and depth to be quite uniform, in order for the sheets to be easily stackable for transport, and to overlap neatly when joining two sheets. Pitches have ranged from 25 mm (1 inch) to 125 mm (5 inches).

The 1896 lighthouse is a timber-framed structure clad in corrugated iron, standing twelve metres high and capped with a domed lantern. The tower is conical in form with a base diameter of approximately reducing to a top diameter of . It has been reinstalled at its original location on a round concrete slab placed over the top of the original 1896 footing when it was returned from Golden Beach in 1999. Corrugations in the iron sheeting taper inwards for the full height of the tower.

The park contains a set of rocks of porphyritic granite composition, with traces of gneisses and quartzites. The outcrops have rounded faces and extensive vertical corrugations from the ground to their summits. "Pedra da Boca" (Rock of the Mouth) is the name of a rock formation about high with a cavity formed by erosion which resembles a giant toad about to gulp something. Other dramatic outcrops include the Pedra da Caveira (Pedra do Anselmo), Pedra do RN, Pedra do Carneiro and Pedra do Letreiro.

TB-3 after emergency landing during the Winter War in March 1940 The TB-3 was an all-metal aircraft of steel construction, as one of the designs from Andrei Tupolev's design bureau to be based on the 1918-onward all-metal aircraft design practices and technology pioneered by Hugo Junkers. The frame was composed of V-section beams covered with non-stressed corrugated skin ranging from to in thickness. The corrugations were deep and apart. The cantilever wing was supported by four tube-section spars.

The corrugations, about wide and deep, formed a very strong bridge. The multi-plate arch design was popular in the 1930s as an alternative to reinforced concrete slab-and-girder construction for bridges with a short span. The bridge could also be assembled by unskilled labor, and the stone masonry was labor-intensive, so the Works Progress Administration was able to employ a number of people in its construction. While many multi- plate arch bridges were built in Minnesota during the Great Depression, bridges of that type are increasingly rare.

Smith Another $250,000 was needed for a rail grinder to remove "totally unexpected rail corrugations". Additionally, the cars were found to be incapable of turning the short radius 18 m turning loop at one end of the line, in spite of UTDC's claims it could, which was going to have to be re-built at a cost of about $6 million. Instead, this portion of the track was simply abandoned. Over a million was originally budgeted to heat the third rail to prevent ice buildup, but later removed as a cost-cutting move.

In the Northern Territory it passes through land owned by the Aboriginal Warlpiri people, and in Western Australia it passes through pastoral land. Gravel section of the track About 20% of the road is bitumen, the remainder is dirt and gravel and, although it is navigable by two-wheel drive vehicles, a four-wheel drive is recommended. Some parts of the road are prone to severe corrugations, making for an uncomfortable and slow drive at times. In January 2020, the federal government committed $235 million to upgrade and seal the road.

In 1925, the Nevada Department of Highways advocated mitigating corrugations with crushed pit-run gravel, using material and smaller, including only the fines from crushing. Contemporaneous advice from Colorado was to use a well-graded gravel, not exceeding and including 25–40% fines passing a sieve, but not more than 5% passing a #10 (2.0-mm) sieve. The maintenance advice from Colorado was to drag or grade the road frequently, applying light volumes of new gravel with minimal sand content and providing good drainage with a crown. The same source advises reduction of traffic speed.

In geometry, minimax eversions are a class of sphere eversions, constructed by using half-way models. It is a variational method, and consists of special homotopies (they are shortest paths with respect to Willmore energy); contrast with Thurston's corrugations, which are generic. The original method of half- way models was not optimal: the regular homotopies passed through the midway models, but the path from the round sphere to the midway model was constructed by hand, and was not gradient ascent/descent. Eversions via half-way models are called tobacco-pouch eversions by Francis and Morin.

Which is the case is currently not known. Superimposed on the larger corrugated surfaces are two systems of smaller scale corrugations: one on a 1–3 km-scale, roughly 200 m high, and another finer about 100–500 m wide. The latter occur up to 1 km from the ridge and is covered by elevated ridges running parallel to the spreading direction, about 10 m wide, hundreds of metres long, and 10 m tall. These in turn are covered with cm-scale striations running in the same direction.

In Cusco, Peru In Bolivia, the giant hummingbird is known in Quechua as burro q'enti, the Spanish word burro referring to its dull plumage. Members of P. gigas can be identified by their large size and characteristics such as the presence of an eye-ring, straight bill longer than the head, dull colouration, very long wings (approaching the tail tip when stowed), long and moderately forked tail, tarsi feathered to the toes and large, sturdy feet. There is no difference between the sexes. Juveniles have small corrugations on the lateral beak culmen.

Total internal reflection confines light to the slab, and allows photonic crystal effects, such as engineering photonic dispersion in the slab. Researchers around the world are looking for ways to use photonic crystal slabs in integrated computer chips, to improve optical processing of communications—both on-chip and between chips. Autocloning fabrication technique, proposed for infrared and visible range photonic crystals by Sato et al. in 2002, utilizes electron-beam lithography and dry etching: lithographically-formed layers of periodic grooves are stacked by regulated sputter deposition and etching, resulting in "stationary corrugations" and periodicity.

While sitting in his younger brother Albert's fountain parlor, the Varsity Sweet Shop in San Francisco (200 19th Avenue), Friedman observed his young daughter Judith at the counter, struggling to drink out of a straight straw. He took a paper straight straw, inserted a screw and using dental floss, he wrapped the paper into the screw threads, creating corrugations. After removing the screw, the altered paper straw would bend conveniently over the edge of the glass, allowing small children to better reach their beverages. U.S. patent #2,094,268 was issued for this new invention under the title Drinking Tube, on September 28, 1937.

In maturity, the fruit bodies, are up to tall, with a latticed spherical cap (the receptaculum) atop a long yellow or reddish stipe. In general, Old World specimens tend to be yellow, while New World specimens are reddish, although exceptions have been noted in the literature. The receptaculum is typically in diameter and forms a red or orange lattice, or mesh. There are typically between 20 and 100 small pentagonal to hexagonal meshes in the receptaculum; the arms of the mesh have sharp ridges on the outer surface, corrugations on the sides, and are flat to weakly ridged on the inner surface.

Crawford was sent for by Admiral Max Horton, Flag Officer Submarines at the time. Crawford expected a "most frightful rocket", but Horton took the matter "very well" and asked if Crawford could suggest anything to prevent such an event happening again. Crawford suggested that the lever for operating the valves for the Q-tank have some corrugations added to it so that even in dim light the operator could feel which tank he was operating. That suggestion was incorporated into all future submarines of that configuration.left Officers of Unseen, 31 January 1944 (left to right): Lieut.

These required a lot of riveting and also some complicated mechanical detail where they met the transverse frames. Knowler's design replaced the internal stringers with external corrugations in the hull plating which needed no riveting and avoided the stringer-frame intersection. They were spaced a few inches apart, so (on each side) there were five above the chine and four on the two step planing bottom. The hydrodynamic novelty was less subtle: most flying boats had used hulls which in cross section curved outwards from the keel rather than take a simple V-form, chiefly to reduce "dirty" upward spray.

It is primarily acted on by the 7:6 resonance with Janus and Epimetheus, with other contributions from the 5:3 resonance with Mimas and various resonances with Prometheus and Pandora. Other orbital resonances also excite many spiral density waves in the A Ring (and, to a lesser extent, other rings as well), which account for most of its structure. These waves are described by the same physics that describes the spiral arms of galaxies. Spiral bending waves, also present in the A Ring and also described by the same theory, are vertical corrugations in the ring rather than compression waves.

The cap has a diameter of 4-7 cm, hemispherical when young, broad to almost flat when mature. Colored dark blue, "Blue Violet," and sometimes ageing to "Maroon Purple," the top is usually smooth, rarely wrinkled or with corrugations with a faintly velvety texture. Pore tubes on the underside are 3-6mm long and 0.5 to 1mm wide, white when young a pale yellowish when mature or bruised. The stipe is 5-7cm long and 1-2 cm thick, not strongly attached to the cap with a narrow top tending toward the thick middle shape typical of Boletus.

The band released the "Concrete" EP in early September 2019, eschewing the drones and extended endings of their previous release for more compact songs with even stronger lead synth elements and sparse guitar work. The song "Reflections Through Corrugations" written by Kerimofski and sung by Dee came in at number 71 of radio station RTRFM's 100 most played songs of 2019. During the early days of the COVID-19 pandemic in Australia Kerimofski prepared four songs for release as separate digital singles, eschewing the LP and EP formats. The first of these "In My Dreams" was released in September 2020 and mixed by American-born producer Casey Rice.

In mathematics, the Cartan–Hadamard conjecture is a fundamental problem in Riemannian geometry and Geometric measure theory which states that the classical isoperimetric inequality may be generalized to spaces of nonpositive sectional curvature, known as Cartan–Hadamard manifolds. The conjecture, which is named after French mathematicians Élie Cartan and Jacques Hadamard, may be traced back to work of André Weil in 1926. Informally, the conjecture states that negative curvature allows regions with a given perimeter to hold more volume. This phenomenon manifests itself in nature through corrugations on coral reefs, or ripples on a petunia flower, which form some of the simplest examples of non-positively curved spaces.

Multiple bushing insulators project from the plastic body, each ending at an electrical terminal. Each overhead wire is connected to a bushing terminal from which the current passes through a rod down the center of the bushing to the interior of the housing, where it is connected to a wire from the conduit. Thus the device allows the overhead conductors to pass into the conduit while serving as a seal to keep out water. The purpose of the bushings, which have corrugations moulded into their surfaces, is to provide enough creepage distance along their surface to prevent leakage current from the high voltage terminal from flowing to the grounded metal conduit.

The waves are interpreted as a spiral pattern of vertical corrugations of 2 to 20 m amplitude; the fact that the period of the waves is decreasing over time (from 60 km in 1995 to 30 km by 2006) allows a deduction that the pattern may have originated in late 1983 with the impact of a cloud of debris (with a mass of ≈1012 kg) from a disrupted comet that tilted the rings out of the equatorial plane. A similar spiral pattern in Jupiter's main ring has been attributed to a perturbation caused by impact of material from Comet Shoemaker-Levy 9 in 1994.

Images from the Galileo and New Horizons space probes show the presence of two sets of spiraling vertical corrugations in the main ring. These waves became more tightly wound over time at the rate expected for differential nodal regression in Jupiter's gravity field. Extrapolating backwards, the more prominent of the two sets of waves appears to have been excited in 1995, around the time of the impact of Comet Shoemaker-Levy 9 with Jupiter, while the smaller set appears to date to the first half of 1990. Galileo's November 1996 observations are consistent with wavelengths of and , and vertical amplitudes of and , for the larger and smaller sets of waves, respectively.

This effectively extended the first concept to now use a conical resonator with corrugations at its edge, allowing a more 'rigid' diaphragm. His failure to register his inventions in the USA allowed John Dopyera and Geo Beauchamp to subsequently obtain US patents for the tricone and single cone designs used in National brand instruments. The use of a phonograph reproducer with mica Isinglass diaphragms allowed the cost of production to be reduced. Phonofiddles had a brief period of popularity as studio instruments for acoustic recording of phonograph records as the energy of the sound could be directed into the collection horn of the recording equipment.

In January 1938, the Soviet Air Forces ordered the TsAGI design bureau led by Andrei Tupolev to design a twin-engined multi-seat fighter to replace the KR-6 escort fighter version of the Tupolev ANT-7 twin- engined multi-purpose aircraft. Tupolev assigned design of the new fighter to a team led by Alexander Arkhangelsky. This was Arkhangelsky's first project as chief designer. The resulting aircraft, the ANT-21, was like the ANT-7, a monoplane, with its corrugated all-metal wings based on those of the ANT-7, but having reduced span, and with the corrugations covered in fabric to reduce drag.

Clapping hands or snapping one’s fingers whilst standing next to perpendicular sheets of corrugated iron (for example, in a fence) will produce a high-pitched echo with a rapidly falling pitch. This is due to a sequence of echoes from adjacent corrugations. If sound is traveling at and the corrugated iron has a wavelength (pitch) of this will produce an echo with a maximum wavelength of that order, which corresponds to a frequency of 4500 Hz or so (approximately the C above top A on a standard piano). The first part of the echo will have a much higher pitch because the sound impulses from iron nearly opposite the clapper will arrive almost simultaneously.

Flame arresters are passive devices with no moving parts. They prevent the propagation of flame from the exposed side of the unit to the protected side by the use of metal matrix creating a tortuous path called a flame cell or element. All detonation flame arresters operate on the same principle: removing heat from the flame as it attempts to travel through narrow passages with walls of metal or other heat-conductive material, but unlike flame arresters, detonation flame arresters must be built to withstand extreme pressures that travel at supersonic velocities, at 2500 m/s is not uncommon with a group D Gas. Detonation flame arresters made by most manufacturers employ layers of metal ribbons with crimped corrugations.

The Saunders A.7 Severn was the last flying boat designed by S.E. Saunders Ltd before the takeover by A.V. Roe and John Lord late in 1928 that produced the Saunders-Roe, or "Saro", company. Its first flight was two years after this change of ownership and it has been alternatively referred to as the Saunders/Saro Severn, the Saunders-Roe A7 and the Saro A7. It was designed to Air Ministry specification R.4/27 for a maritime patrol aircraft. It was the second Saunders aircraft to use their patented "corrugated" structure for the hull, first trialled on the Saunders A.14, in which longitudinal external corrugations in the skin replaced internal riveted stringers.

There's no evidence to support the idea that if you replay the tape of life it will come out looking anything like what we see today. You can be confident that when you visit another planet you will not find vertebrates." The evolutionary developmental biologist Lewis Held wrote that "The notion that aspects of anatomy can be explained by physical forces (like expansion cracking) was advocated ~ 100 years earlier in D'Arcy Thompson's 1917 On Growth and Form and in Theodore Cook's 1914 book The Curves of Life. Over the intervening century, various traits have been proposed to arise mechanically rather than genetically: brain convolutions, cartilage condensations, flower corrugations, tooth cusps, and fish otoliths.

The Black Assarca shipwreck was first discovered by tourists in 1995, at Black Assarca Island, Eritrea. The wreck was surveyed in 1995 and partially excavated in 1997 by the Institute of Nautical Archaeology, under the auspices of the Ministry of Marine Resources of Eritrea. The 1997 excavation team, headed by Ralph K. Pedersen, discovered various artifacts of Near Eastern/Mediterranean origin, including amphoras of a type known as "Ayla-Axum Amphoras", or more accurately "Aqaba Amphoras" after their point of manufacture. These long and conical "carrot shaped" amphoras, decorated with corrugations, or rilling, have been found previously at such sites as: Aksum, the capital of the Aksumite Kingdom; Metara; Adulis, the Aksumite port city located on the west side of Zula Bay; Berenike, the Ptolemaic harbor in Egypt; and Aqaba, Jordan.

Heavy rain fell in the session's final hour and the resulting slippery track prevented drivers from improving their best laps. The session was stopped three times because a heavy wind caused a gantry-mounted cardboard advertising hoarding, joined together by nylon ties above the start/finish straight, to detach and fall onto the track. Häkkinen went fastest with 15 minutes to go before the rain fell with a 1-minute, 14.111 seconds lap, earning his second consecutive pole position, his third in Brazil and the 23rd of his career. Häkkinen's teammate Coulthard was second and the Ferrari duo of Michael Schumacher and Barrichello took third and fourth; Schumacher understeered into the grass on his second timed lap, damaging his car's undertray on the corrugations of a high-mounted kerb.

In electronics, a crossatron is a high-power pulsed modulator device, a cold cathode gas-filled tube that combines the best features of thyratrons, vacuum tubes, and power semiconductor switches. This switch is capable of operating with voltages in excess of 100 kilovolts by the use of deuterium gas fill to increase the Paschen breakdown voltage, axial molybdenum cathode corrugations to provide a higher current capability, and a Paschen shield that is formed from molybdenum. The terminal curvature of the Paschen shield and of the adjacent portion of the anode are selected to establish a voltage stress at the curved Paschen shield surface within the approximate range of 90-150 kV/cm in response to a 100 kV differential. The cold cathode gives the crossatron an advantage of achievable lifetime and reliability in comparison to a hydrogen- filled thyratron.

A Johnson bar (also Johnson corrugated bar) is a type of corrugated high- carbon steel rebar used to reinforce concrete. The Johnson bar was invented by A.L. Johnson of the St. Louis Expanded Metal Company. Its specific efficacy comes from having "alternate elevations and depressions to grip the concrete," with the shoulders of the corrugations having "an inclination with the axis of the bar" to prevent slipping between the bar and the concrete. The pattern of elevations and depressions aids in the stability of the structure; even if a Johnson bar no longer adheres to the concrete (due to vibrations, for instance, or to accidentally being smeared with oil, reducing the adhesion significantly, as may happen during careless construction), it will have a hold on the concrete as strong as or stronger than a "plain" bar (that is, a simple prismatic bar).

The Saunders fuselage was a little shorter than Supermarine's, by about a foot (300 mm) and also lighter judging by the overall empty weights for the two aircraft (8,870 lb or 4,023 kg for the A.14, 9,697 lb or 4,398 kg for the Southampton). Certainly the Southampton had the more graceful lines, the rounded fuselage rising smoothly to the tail in contrast with the A.14's slab sided, linearly graded form. The two aircraft had almost identical maximum speeds, confirming Knowler's estimate that the inevitable extra drag of the external corrugations would be insignificant at the low speeds of these biplane flying boats. Crew accommodation was rather like that of the Valkyrie and the Southampton, with dual control tandem open cockpits forward of the wings, a gunner's position in the extreme nose and two staggered dorsal gunner's cockpits aft of the wings.