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from article Nose cone
Flow about slender body.
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from article Nose cone
Flow about blunt body.
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from article Cogeneration system
Cogeneration topping-cycle system.
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from article Cogeneration system
Cogeneration bottoming-cycle system.
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from article Nuclear reactor
Boiling-water reactor. (1) The core inside the reactor vessel creates heat. (2) A liquid-steam mixture is produced when very pure water (reactor coolant) moves upward through the core, absorbing heat. (3) The liquid-steam mixture leaves the top of…
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from article Nuclear reactor
Pressurized-water reactor. (1) The core inside the reactor vessel creates heat. (2) Pressurized water in the primary coolant loop carries the heat to the steam generator. (3) Inside the steam generator, heat from the primary coolant loop vaporizes…
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from article Nuclear reactor
A nuclear plant, using a pressurized-water reactor. The PWR keeps water under pressure so that it is heated, but does not boil. Water from the reactor and the water in the steam generator that is turned into steam never mix. In this way, most of the…
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from article Nuclear reactor
High-temperature gas-cooled reactor. (Credit: Atomic Industrial Forum, Inc.)
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from article Nuclear reactor
Loop-type liquid-metal fast breeder reactor. In some designs, referred to as pool-type, the heat exchanger and primary sodium pump are located with the core inside the pressure vessel. (Credit: Atomic Industrial Forum, Inc.)
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from article Barracuda
Great barracuda (Sphyraena barracuda). (Photo copyright © John E. Randall)
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from article Armature
A rotor armature of of a direct-current generator or motor. (General Electric)
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from article Armature
A stator armature of an ac induction motor in a motor repair shop. (General Electric)
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from article Circle
A circle, with radius, diameter, and circumference indicated. (Credit: McGraw-Hill Education)
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from article Circle
Nine-point circle and Euler line PMH.
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from article Sonobuoy
Launch of a sonobuoy from an antisubmarine warfare (ASW) aircraft. (a) In flight. (b) Buoy strikes the water in a nearly vertical attitude. (c) Antenna and hydrophone are positioned automatically.
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from article Branch circuit
Typical electrical wiring system. Branch circuits are those portions of system beyond the final overcurrent device approved for branch-circuit protection.
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from article Engineering geology
Diagram of a typical landslide monitoring instrumentation. (Credit: USGS)
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from article Engineering geology
Rock-physics laboratory instrumentation for testing triaxial shear strength. Shearing stresses tend to separate portions of the rock (or soil) mass. Faults and folds are examples of shear failures in nature. In engineering structures, every…
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from article Engineering geology
Geologic map that can be used to identify geologic hazards and for land-use planning. (Credit: USGS)
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from article Flight controls
Simplified diagram of a typical primary flight-control system, governing attitude and direction. ( After C. H. Chatfield, C. F. Taylor, and S. Ober, The Airplane and Its Engine, 5th ed., McGraw-Hill, 1949)
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from article Flight controls
Typical airplane control systems of varying degrees of complexity, illustrated for the case of longitudinal (elevator or stabilizer) control. Similar systems are used for the other control surfaces. (a) Mechanical control system. (b) Mechanical…
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from article Flight controls
Examples of active control. (a) Active control to allow reduced static stability. Change in angle of attack and associated change in lift produce an upsetting moment. (b) Active maneuver load control. (c) Active control for gust load alleviation. (d…
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from article Blowpipe
Glassblower blowing into a blowpipe to shape molten glass. (Credit: Hero Images/Getty Images)
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from article Trihedron
Trihedron and trihedral angles.
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from article Trihedron
Spherical triangle ABC formed by intersection of sphere with a trihedron. The center of the sphere is at the vertex of the trihedron.
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from article Tin
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from article Tin
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from article Electric filter
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from article Electric filter
Passive, lumped-element filters. (a) RC low-pass filter. (b) LC band-pass filter.
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from article Electric filter
Ladder structure. (a) Overall structure with alternating series and shunt arms. (b) LC circuit whose impedance contains both a finite-frequency pole and a zero. Such circuits are used in the series and shunt arms of the ladder structure.
Image
from article Electric filter
Mechanical filter.
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from article Electric filter
Single-amplifier filters. (a) Low-pass Sallen-Key filter. (b) Low-pass, infinite-gain, single-amplifier filter. (c) Cascade of second-order filter realizations.
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from article Electric filter
Multiple-amplifier filters. (a) State-variable (KHN) filter. (b) Tow-Thomas filter.
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from article Electric filter
Simulated-inductor realization of fifth-order high-pass filter. (a) RLC prototype, normalized for cutoff frequency of 1 rad/s (0.159 Hz). (b) Direct active-RC realization.
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from article Satellite television broadcasting
Direct broadcasting television satellite system.
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from article Xenophyophorida
Xenophyophorids. (a) Stannoma dendroides. (b) Stannophyllum zonarium. (c) Psammetta erythrocytomorpha, section showing interlacing tubules and dark inclusions of uncertain nature.
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from article Sewage treatment
Street water drainage pipe emptying water out into nature. (Credit: Shutterstock /Brian Legate)
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from article Sewage treatment
Wastewater treatment through the secondary process.
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from article Sewage treatment
Grit chamber. (Credit: U.S. EPA)
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from article Sewage treatment
Trickling filters. (Credit: U.S. EPA)
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from article Sewage treatment
Activated sludge treatment. (Credit: U.S. EPA)
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from article Genetically modified organism (GMO)
Transgenic zebrafish cells. Green fluorescent protein (GFP) is a fluorescent protein first discovered in the jellyfish Aequorea victoria. GFP is commonly used as a reporter of gene expression in other species. Here, GFP is expressed by zebrafish…
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from article Genetically modified organism (GMO)
Genome editing technologies. In particular, targeted nucleases are a powerful tool for precise genome editing in GMOs. Among these tools are (a) transcription activator-like effector nucleases (TALENs), (b) zinc-finger proteins (ZFPs), (c) homing…
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from article Metallography
Photomicrographs of typical microstructures of brass (70% Cu–30% Zn). (a) Annealed; grains with twin bands. (b) Reduced 40% by cold rolling; distorted grains. (c) Stress-corroded, with horizontal crack. (Courtesy of W. R. Johnson)
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from article Metallography
Photomicrographs of typical structures of iron and steel. (a) High-purity iron. (b) Steel containing 0.85% C, slowly cooled; pearlite structure, consisting of alternating layers of light ferrite and dark cementite. (c) Steel containing 0.80% C,…
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from article Metallography
Scanning electron micrograph of polymer latexes. The acrylic latex spheres of 400-nm diameter are on the surface of 19-μm polystyrene latex. (Courtesy of O. L. Shaffer)
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from article Metallography
Electron energy loss spectrum (EELS) image showing spherical precipitates of Al3Li in an aluminumlithium alloy. The intensity of each pixel of the digital image represents the energy lost by electrons passing through that region of the thin…
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from article Sloan Digital Sky Survey
Sloan Digital Sky Survey (SDSS) 2.5-m (98-in.) telescope at Apache Point Observatory, New Mexico. The secondary mirror is visible in the center of the aperture. The square structure surrounding the primary and secondary mirrors shelters them from…
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from article Sloan Digital Sky Survey
Spectrum of a galaxy (image inset) receding at around 6000 km s−1 (3700 mi s−1), or about 2% of the speed of light. The vertical line shows the wavelength at which one expects to observe the emission line Hα for an object at rest (656.3 nm). The…
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from article Sloan Digital Sky Survey
Distribution of galaxies within 4° of the celestial equator from the SDSS. In this polar plot, the radius indicates the distance from the Milky Way, and the angle is the right ascension. The diameter shown is 8 × 109 light-years. Blank areas have…
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from article Sloan Digital Sky Survey
Map of stars in the SDSS. Grayscale signifies density of stars on the sky. Several streams of stars are noticeable. Areas in background are those unobserved by the survey. (Courtesy of Vasily Belokurov; Sloan Digital Sky Survey)
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from article Sloan Digital Sky Survey
Image of Canes Venatici I, a recently discovered satellite of the Milky Way Galaxy. (Photo courtesy of Vasily Belokurov; Sloan Digital Sky Survey)
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from article Sloan Digital Sky Survey
Hubble sequence of galaxies, as observed by the SDSS. Elliptical galaxies (types marked E0 and E6) are old, spheroidal, and very massive. Spiral galaxies are on average less massive. While some spiral galaxies (S0 and Sa) tend to have very little…
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from article Iridium
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from article Musk-ox
Musk-ox (Ovibos moschatus). (Credit: Brent Huffman/Ultimate Ungulate Images)
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from article Binary and multiple asteroids
Asteroid 121 Hermione and its moonlet companion observed with the adaptive optics system mounted on the European Southern Observatory's Very Large Telescope [consisting of four 8.2-m (25-ft) telescopes] at six different times. The satellite revolves…
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from article Gamma function
Depiction of gamma function Γ(z) for real values of z.
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from article Human-factors engineering
Human-factors engineers design modern computer equipment, including ergonomic keyboards and mouse devices, to accommodate the varied physical contours and dimensions of the human hand. (Credit: JG Photography/Alamy)
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from article Human-factors engineering
Human-factors engineering addresses problems related to the design of seats, workplaces, and consoles in terms of a user's physical size, comfort, strength, and visibility. (Copyright © McGraw-Hill Education)
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from article Human-factors engineering
Cognitive engineering and the development of new technology applications.
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from article Marten
American marten (also known as the American pine marten; Martes americana). (Photo by Gerald and Buff Corsi; copyright © California Academy of Sciences)
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from article Two-phase flow
Flow patterns of the gas-liquid flow in a vertical pipe.
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from article Two-phase flow
Flow patterns of gas-liquid flow in a horizontal pipe.
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from article Two-phase flow
Hydrocyclone phase-separation system.
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from article Direct-coupled amplifier
Level-shift stages using (a) Zener diodes, (b) series of diodes, and (c) VBE multiplier circuit. V1 = input voltage, V2 = output voltage.
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from article Direct-coupled amplifier
Differential dc amplifier with constant-current stage in the emitter circuit.
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from article Solar cell
Photovoltaic panels for renewable electric production. (Credit: Shutterstock/Soonthorn Wongsaita)
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from article Solar cell
Cross-sectional view of a silicon pn junction solar cell, illustrating the creation of electron pairs by photons of light energy from the Sun. 0.0001″ = 2.5 μm; 0.04″ = 1 mm; 1.0″ = 25 mm.
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from article Solar cell
Rooftop solar panel installation. (Credit: Elenathewise/Getty Images)
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from article Saturn
Saturn viewed on April 25, 2016 by the Cassini orbiter as the planet neared its northern hemisphere's summer solstice. (Credit: NASA/JPL-Caltech/Space Science Institute)
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from article Saturn
Saturn viewed from the Cassini orbiter. The soft velvety appearance of the low-contrast banded structure is due to scattering by the haze layer above the planet's cloud deck. The image has been rotated so that north is up. The Sun illuminates Saturn…
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from article Saturn
Presentations of Saturn's ring system over the course of a Saturnian year.
Image
from article Saturn
Images from the Cassini spacecraft show the life cycle of Saturn's great northern storm beginning on December 5, 2010, when a small white cloud appeared at latitude 33°N. In these views, the Cassini spacecraft was in the ring plane, and the ring…
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from article Saturn
A natural color view of Saturn's rings from the Cassini Orbiter taken on August 22, 2009, at a distance of 2.05 million km (1.27 million mi) from Saturn. (Credit: NASA/JPL/Space Science Institute)
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from article Saturn
Structure of Saturn's rings observed by two different approaches. The upper half of the image is a natural-color mosaic of images by the Cassini narrow-angle camera. Such images have information about how ring structure differs both with distance…
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from article Saturn
Saturn's F ring viewed from the Cassini orbiter. Features resembling drapes and kinks are visible, and several distinct ringlets are present, in addition to the bright knotted core of the ring. The structure in the ring and its strands has been…
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from article Saturn
Titan superimposed in front of Saturn, captured by the Cassini spacecraft. (Credit: NASA/JPL-Caltech/Space Science Institute)
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from article Saturn
The satellite Phoebe taken during Cassini's flyby on June 11, 2004. The image shows evidence for the theory that Phoebe is an ice-rich body coated with a thin layer of dark material. (Credit: NASA/JPL/Space Science Institute)
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from article Gas turbine
Basic gas turbine cycle.
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from article Gas turbine
Simple gas turbine component arrangements.
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from article Gas turbine
Simple cycle performance. (a) Thermal efficiency versus cycle pressure ratio and (b) specific power versus cycle pressure ratio, which is the ratio of maximum pressure to ambient pressure.
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from article Gas turbine
Typical dual-spool gas turbine components.
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from article Gas turbine
Gas turbine variations.
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from article Gas turbine
Typical performance for gas turbine variants, where cycle pressure ratio is the ratio of maximum pressure to ambient pressure.
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from article Gas turbine
Industrial gas turbine.
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from article Gas turbine
Aeroderivative gas turbine. (Pratt & Whitney)
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from article Gas turbine
Combined cycle.
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from article Gas turbine
Integrated coal gasification system.
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from article Absorption
Incident sunlight is absorbed, reflected, and scattered by tree leaves. (Credit: Shutterstock / photolinc)
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from article Capricornus
Modern boundaries of the constellation Capricornus, the Sea Goat. The celestial equator is 0° of declination, which corresponds to celestial latitude. Right ascension corresponds to celestial longitude, with each hour of right ascension representing…
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from article Geotechnical engineering
Mike O'Callaghan-Pat Tillman Memorial Bridge over the Colorado River at the Hoover Dam, spanning Nevada and Arizona, USA. Geotechnical engineering of the bridge site included 3D laser scanning of the canyon walls, geologic mapping, core drilling,…
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from article Tanaidacea
Leviapseudes bipartitus. [K. Larsen, Deep-Sea Tanaidacea (Peracarida) from the Gulf of Mexico, Brill, Leiden, 2005]
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from article Tanaidacea
Typhlotanais ohtsukae: (top) female; (bottom) male. [K. Larsen and M. Shimomura, Tanaidacea (Crustacea: Peracarida) from Japan: II. Tanaidomorpha from the East China Sea, the West Pacific Ocean and the Nansei Islands, Zootaxa, 1464:1–43, 2007]
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from article Rock mechanics
Typical rock mass containing numerous discontinuities. The person in picture is conducting a scanline survey, where a tape is placed across the rock and detailed information is gathered on the fractures that intersect the scanline.
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from article Rock mechanics
(a) Uniaxial compression test, where an axial stress is applied to a core sample of rock and increased until failure. (b) Triaxial compression test, where a constant confining stress is first applied, then the axial stress is increased until failure.
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from article Rock mechanics
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from article Rock mechanics
(a) Example of the failure zone around an underground excavation (×, shear failure; o, tensile failure), calculated using the Rocscience Phase2 computer program. (b) Example of a shallow underground excavation where the failure mode is either…
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from article Rock mechanics
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from article Aluminum metallurgy
Bauxite washing. (Aluminum Company of America)
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from article Aluminum metallurgy
Processing of alumina from bauxite. (Aluminum Company of America)
