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from article Information processing (psychology)

The four major lobes of the cerebral cortex, that is, the frontal, parietal, temporal, and occipital lobes, are responsible for different aspects of information processing. (Copyright © McGraw-Hill Education)

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from article Information processing (psychology)

Horizontal associative memory with a serious associative interference problem (who plays tennis—John, Peter, or both?) and no encoding of where each proposition begins and ends. (Copyright © McGraw-Hill Education)

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from article Information processing (psychology)

Vertical associative memory where concepts are grouped into phrases and propositions by associating each concept to a higher-order node that represents the entire group. (Copyright © McGraw-Hill Education)

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from article Strychnos

Strychnos nux-vomica: close-up view of leaves and flowering branch. (Photo courtesy of Dinesh Valke)

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from article Clathrate compounds

Schematic drawing of the lattices of (a, c) urea and (b, d) thiourea; c and d show accommodation of unbranched and branched paraffin chains, respectively.

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from article Clathrate compounds

Molecular model of α-dextrin–iodine compound seen in the direction of the c axis, that is, in the direction of the iodine chains, which lie in channels.

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from article Space flight

Earthrise, with the surface of the Moon in the foreground, photographed by astronauts aboard the Apollo 8 mission in late 1968. Apollo 8 was the first crewed mission to the Moon. (Credit: NASA)

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from article Space flight

Soyuz, a third-generation Soviet spacecraft. 1 m = 3.3 ft.

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from article Space flight

Comparison of U.S. spacecraft and launch vehicle configurations through 1972. (Credit: NASA)

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from article Space flight

The Apollo 11 lunar module on the surface of the Moon in July 1969. (Credit: NASA)

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from article Space flight

Skylab in orbit around Earth. (Credit: NASA)

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from article Space flight

The space shuttle Discovery launching in July 2006. (Credit: NASA)

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from article Space flight

Shuttle Atlantis returning home to Kennedy Space Center after its final mission, July 21, 2011. (Credit: NASA)

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from article Space flight

The completed International Space Station in orbit around Earth. (Credit: NASA)

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from article Space flight

Artist's impression of the Space Launch System with the Orion spacecraft on top. (Credit: NASA)

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from article Wire drawing

Wire being drawn through a die.

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from article Wire drawing

Comparison of (a) ideal and (b) redundant deformation.

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from article Wire drawing

Variation of the work terms with die angle according to Eqs. (1), (3), (4), and (6), with ε = 0.3 and η = 0.08.

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from article Wire drawing

Dependence of the efficiency on die angle for several reductions. A friction coefficient of μ = 0.08 was assumed.

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from article Wire drawing

Comparison of the predictions of I.F. from Eq. (12) with experiments on copper.

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from article Wire drawing

Microstructure of a tungsten wire cold-drawn to an 87% reduction of area, viewed along the wire axis.

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from article Metal rolling

Rolling process. (a) Direction of friction forces in the roll gap. (b) Velocity distribution. (c) Normal pressure acting on the strip in the roll gap.

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from article Metal rolling

Basic types of roll arrangement. (a) Two-high. (b) Three-high. (c) Four-high. (d) Cluster. (e) Tandem rolling with three stands. (f) Planetary mill.

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from article Metal rolling

Development of the Mannesmann process for producing seamless tubing (a–c explained in text).

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from article Incandescence

Graph showing the relation between the brightness of a blackbody and temperature. °F = (°C × 1.8) + 32.

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from article Guided missile

GBU-15 with data link system, mounted on F-4 Phantom II fighter. (Hughes Aircraft Co.)

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from article Guided missile

TOW (tube-launched, optically tracked, wire-guided) antitank missile and launch tube. Wings and tails fold to permit tube mounting. (Hughes Aircraft Co.)

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from article Guided missile

Launching of a field-mobile, short-range, all-weather surface-to-air Roland missile. The West German–French Roland has been licensed for production in the United States for use as a U.S. Army air defense weapon. (U.S. Army)

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from article Guided missile

F-15 Eagle fighter aircraft equipped with a mixture of short-range, infrared Sidewinder and medium-range, radar Sparrow air-to-air missiles. (McDonnell-Douglas)

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from article Guided missile

Phoenix long-range air-to-air supersonic missile. (a) Side view (Hughes Aircraft Co.). (b) Launch from F-14 fighter aircraft (U.S. Navy).

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from article Guided missile

Falcon air-to-air missile family, including missiles with infrared and radar guidance, and high-explosive and nuclear warheads. (Hughes Aircraft Co.)

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from article Guided missile

Tomahawk long-range, subsonic cruise missile. (a) Side view. (b) Submerged launch. Missile may also be launched from surface or air. (General Dynamics)

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from article Guided missile

Harpoon antiship cruise missile. (a) Ship-launched. (b) Air launch version on A-6 intruder attack aircraft. (McDonnell-Douglas)

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from article Guided missile

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from article Colemanite

Fundamental building block in the crystal structure of colemanite.

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from article Colemanite

Crystal structure of colemanite viewed down the a axis. The 〈Δ2□&x3009 x232A; rings link to form chains of borate polyhedra parallel to the c axis.

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from article Atomic bomb

The mushroom cloud over Nagasaki, Japan, after an atomic bomb was dropped by U.S. aircraft on August 9, 1945. (Credit: Everett Historical/Shutterstock)

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from article Atomic bomb

Conceptual diagrams illustrating the main features of (a) implosion type and (b) gun-barrel type of fission weapons. (Credit: A. DeVolpi)

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from article Gain

Gain by an amplifier or other system.

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from article Gain

Bode diagrams. (a) Gain plot. (b) Phase plot.

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from article Breadfruit

Breadfruit (Artocarpus altilis), showing the rounded (or elliptic) fruit and the cylindrical staminate flower cluster. (Photo courtesy of Forest and Kim Starr)

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from article Robotics

A dexterous humanoid robot (robonaut) built at the NASA Johnson Space Center in Houston, Texas, USA to work alongside humans in space. (Credit: NASA)

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from article Robotics

A model for the selective compliance assembly robot arm (SCARA). It has 3 links. Horizontal links move sideways and the third (vertical) link moves up and down. It shown here with a drill, a chuck, and drill bit. (Credit: Richard Pasala)

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from article Robotics

The right hand of a NASA robot grasping a hook. The robot's hands closely mimics the human hand in order to use tools and handholds designed for astronauts. (Source: NASA)

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from article Robotics

Six-legged walking robot. (Odetics)

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from article Isotope

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from article Isotope

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from article Optical flat

Optical flat being used to determine flatness of seal ring. Interference bands on the seal ring face show lines of constant depth. (Van Keuren Co.)

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from article Optical flat

Measurement of height of sphere determined by means of gage blocks and optical flat. 1″ = 25.4 mm.

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from article Composite material

NASA technicians inspecting the keel section of a PRSEUS (Pultruded Rod Stitched Efficient Unitized Structure). This is a new way for aircraft sections to be built by sewing together layers and rods of composite material. (Credit: NASA…

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from article Composite material

Specific properties of various materials.

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from article Composite material

Tensile strength, modulus, and elasticity of various fiber materials. UHMWPE = ultrahigh-molecular-weight polyethylene; SiC = silicon carbide.

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from article Composite material

Typical autoclave layup.

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from article Composite material

Typical layups for (a) resin transfer molding (RTM) and (b) vacuum infusion (VI).

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from article Hydroponics

Green- and red-leaf lettuce growing in a hydroponic vegetable garden on a bamboo fence. The pipes, which supply nutrients and water, are part of the hydroponic system. (Credit: Piyachok Thawornmat, Shutterstock)

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from article Hydroponics

Hydroponic techniques: (a) aerated standing culture; (b) flowing-solution culture with standing solution; (c) nutrient film technique; (d) aeroponics.

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from article Emerald

Emerald crystals. (Credit: Reimphoto/Getty Images)

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from article Uninterruptible power supply

Block diagram of a line-preferred UPS (off-line technology).

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from article Uninterruptible power supply

Block diagram of an on-line UPS with bypass switch.

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from article Uninterruptible power supply

Block diagram of the flywheel rotary UPS topology.

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from article Uninterruptible power supply

Block diagram of diesel rotary UPS topology.

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from article Uninterruptible power supply

Block diagram of the online distributed configuration.

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from article Uninterruptible power supply

Block diagram of line-interactive distributed application.

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from article Uninterruptible power supply

Block diagram of the centralized approach.

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from article Mango

Tommy Atkins cultivar of mango (Mangifera indica) growing in Florida. (Credit: Wilhelmina Wasik/Agricultural Research Service, U.S. Department of Agriculture)

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from article Tomato

Tomatoes (Solanum lycopersicum). (Credit: Peggy Greb, Agricultural Research Service, U.S. Department of Agriculture)

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from article Tomato

Tomato affected by anthracnose (caused by the fungus Colletotrichum phomoides). (Credit: U.S. Department of Agriculture Cooperative Extension Slide Series, Clemson University)

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from article Tomato

Tomatoes showing blossom-end rot. (Credit: Mary Ann Hansen, Virginia Polytechnic Institute and State University)

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from article Ohmmeter

Electronic digital ohmmeter. (Tinsley)

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from article Ohmmeter

Diagram of ohmmeter, showing operating principles. C1, C2 = current terminals; P1, P2 = potential terminals.

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from article Ohmmeter

Special measuring probes (Kelvin clips), consisting of a set of leads with combined current probes (C1, C2) and potential probes (P1, P2).

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from article Cavity resonator

Closed-end sound pipe resonating (a) at the fundamental frequency f1 (the first harmonic) with wavelength λ1, and (b) at an overtone, f3 ≈ 3f1 (the third harmonic), with wavelength λ3.

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from article Cavity resonator

Wavemeters. (a) Wavemeter consisting of cylindrical cavity with an adjustable end-wall, resonating in the TE011 mode. The free-space wavelength λ0 corresponding to the resonant frequency f0 is given by λ0 = 2L[1 + (2L/1.64a)]− 1 2 . (b) Practical…

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from article Cavity resonator

Determination of the Q of a cavity resonator by (a) measuring the bandwidth and (b) measuring the damping rate of the oscillations.

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from article Lens (optics)

Refraction of light waves demonstrated by the disjointed appearance of a spoon entering a bowl of water, as well as the transposition of background colors due to the bowl's curvature. (Credit: Copyright © McGraw Hill)

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from article Lens (optics)

Illustration of a standard concave lens (left) that acts as a diverging lens and a standard convex lens (right) that acts as a converging lens.

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from article Mixing

Typical impeller-type liquid mixer. (After V. W. Uhl and J. B. Gray, Mixing: Theory and Practice, vol. 2, Academic Press, 1967)

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from article Mixing

Effect of impeller size and speed on flow and turbulence (shear) at constant power.

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from article Mixing

Common impellers. (a) Marine-type mixing propeller. (b) Axial-flow (pitched-blade) turbine. (c) Flat-blade (Rushton) turbine. (After R. H. Perry and C. H. Chilton, eds., Chemical Engineers' Handbook, 5th ed., McGraw-Hill, 1973)

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from article Mixing

Swirling flow pattern for impeller of any shape, without baffles. (a) Side view. (b) Bottom view.

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from article Mixing

Flow patterns with baffles. (a) Flow pattern for propeller with baffles at tank wall. (b) Flow pattern for turbine with baffles at tank wall.

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from article Mixing

Flow pattern for top-entering, off-center propeller without baffles: (a) front, (b) top, and (c) side views.

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from article Mixing

Side-entering propeller mixer position. With proper propeller position, no vortex will result.

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from article Mixing

Ribbon turbine with double spiral, for high-viscosity liquids.

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from article Mixing

Coexistence of (a) chaotic and (b) nonchaotic mixing in a duct-type flow.

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from article Mixing

Unmixing of particles of two different sizes in a rotating tumbler operating in a time periodic mode.

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from article Learning

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from article Learning

Brain activity can be recorded in various ways, from single-cell activity (top tracing) to the familiar electrical patterns ("brain waves") of an electroencephalogram (bottom tracing). (Credit: Based on an original drawing by C. Cotman and J.…

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from article Pine nut

Pine nuts in their hard shell (Mexican piñon pine, Pinus cembroides). (Photo by Steve Hurst, U.S. Department of Agriculture–Natural Resources Conservation Service PLANTS Database)

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from article Pine nut

Cone containing pine nuts (stone pine, Pinus pinea). (Photo by Vito Buono, Bari, Italy)

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from article Pyroclastic rocks

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from article Pyroclastic rocks

Distribution downwind of the pyroclastic fall deposit from the climactic eruption of Mount St. Helens, Washington, on May 18, 1980. The contours (isopachs) are drawn through points of measured equal thickness (in centimeters) of this ash layer.…

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from article Pyroclastic rocks

Aerial view in March 1998 of the fan-shaped pyroclastic delta formed by repeated entries of pyroclastic flows and surges into the Caribbean Sea during the Soufrière Hills Volcano eruption in 1996–1997. (Photograph by R.P. Hoblitt, USGS)

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from article Pyroclastic rocks

Observed or postulated mechanisms for the generation of pyroclastic flow and surge deposits (from W. E. Scott, 1989). (a, b) Mechanisms that commonly produce block-and-ash flow deposits. (b, c) Mechanisms that trigger laterally directed blasts.…

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from article Pyroclastic rocks

Some variations in pyroclastic rock formations. (a) Layers of pyroclastic fall deposits from the eruption plume of the June 15, 1991, explosive eruption of Mount Pinatubo (Luzon, Philippines). This exposure, located about 9 km (5.5 mi) southeast of…

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from article Electric power generation

Coal-fired electric power plant. (Credit: mrclark321/Getty Images)

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from article Electric power generation

Steam power plant flow diagram.

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from article Electric power generation

Gas turbine plant flow diagram.

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from article Electric power generation

Cross section of a hydroelectric powerhouse. Arrangement is typical for an adjustable propeller-type reaction turbine. The intake and powerhouse are integral; waterways consist of intake, scroll case, and draft tube. Turbine and generator are set…

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from article Dewar flask

Two typical Dewar containers.

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