Image
from article Bridge maintenance
Under-bridge snooper truck during bridge inspection. (Courtesy Lian Duan)
Search Results
Search Results
Refine this search
Search result paging links
8,649 results
Image
from article Bridge maintenance
Repair of concrete I-girder by replacement of damaged concrete.
Image
from article Bridge maintenance
Strengthening of a steel I-girder by adding new steel plates to flanges.
Image
from article Bridge maintenance
Strengthening a steel girder by applying external post-tensioning force.
Image
from article Bridge maintenance
A typical steel jacket for a reinforced-concrete column.
Image
from article Bridge maintenance
Built-up steel member retrofit. (Courtesy Lian Duan)
Image
from article Bridge maintenance
Seismic isolation bearing installed in the Antioch Bridge, California. (Courtesy Lian Duan)
Image
from article Bridge maintenance
A damper installed in the west span of the San Francisco–Oakland Bay Bridge, California. (Courtesy Lian Duan)
Image
from article Video disk
DVD operational principles.
Image
from article Process control
Optimum operation of distillation column.
Image
from article Process control
Estimation of product quality by on-line computer.
Image
from article Process control
Block diagram illustrating feedback loop around process.
Image
from article Process control
Feedback and feedforward control on continuous stirred chemical reactor.
Image
from article Process control
Block diagram of typical feedforward control.
Image
from article Process control
Closed-loop fuzzy process control.
Image
from article Process control
Neural network for process modeling and control.
Image
from article Process control
Local computer system.
Image
from article Process control
Schematic example of modern distributed control system.
Image
from article Manganese
Image
from article Crystal growth
Schematic representation of cross section of crystal at three stages of regular growth.
Image
from article Crystal growth
A model of a crystal surface showing the inequivalent binding sites at which the atoms labeled A and B are located. (General Electric Co.)
Image
from article Crystal growth
A dendrite. Growth direction is upward for primary protuberances; side branches grow perpendicularly; side branches on the side branches are also seen growing perpendicularly. (After W. Kurz and D. J. Fisher, Fundamentals of Solidification, Trans…
Image
from article Crystal growth
Hypothetical binary system AB having simple compound formation. (a) Phase diagram. (b) Corresponding partial pressure curves. The extent of the stoichiometry range is greatly exaggerated for illustration.
Image
from article Crystal growth
Czochralski crystal growth and temperature distribution.
Image
from article Crystal growth
Vertical Bridgman crystal and temperature distribution.
Image
from article Crystal growth
An isotherm in the aluminum-gallium-arsenic (Al-Ga-As) ternary phase diagram. Each corner represents a pure element and each point within the diagram a unique composition, all at a given temperature. Each composition on the liquidus is in…
Image
from article Crystal growth
Molecular-beam epitaxy apparatus.
Image
from article Crystal growth
Cross section of a gallium arsenide–aluminum arsenide (GaAs–AlAs) single crystal with individual gallium arsenide and aluminum arsenide layers each about 5 × 10−10 m thick.
Image
from article Oscillatory reaction
Oscillatory behavior in a sulfuric acid medium containing potassium bromate, malonic acid, and cerous nitrate. The upper curve is the potential (in unspecified units) of a tungsten electrode and is related to the concentration ratio of…
Image
from article Oscillatory reaction
Rotating spiral bands of oxidation in a thin layer of solution containing the same reagents as in Fig. 1 except that the redox indicator ferrous phenanthroline has been substituted for cerous ion. (Courtesy of Prof. A. T. Winfree, University of…
Image
from article Oscillatory reaction
Layers of crystallization from an initially uniform magma in the Skaergaard Intrusion in Greenland. (From A. R. McBirney and R. M. Noyes, Crystallization and layering of the Skaergaard Intrusion, J. Petrol., 20:487–554, 1979)
Image
from article Food manufacturing
Image
from article Food manufacturing
Average composition of the United States diet dry weight per capita per day. Prior sanctioned substances were specifically approved by FDA or USDA for use in food prior to the passage of the Food Additives Amendment in 1958.
Image
from article Food manufacturing
Rank ordering of food ingredients by per capita annual disappearance.
Image
from article Food manufacturing
Image
from article Food manufacturing
Flow chart of the fiber-spinning technique used to prepare food analogs. (After N. R. Lockmiller, Increased utilization of protein in foods, Cereal Sci. Today, 18(3):77–81, 1973)
Image
from article Food manufacturing
Typical high-temperature extrusion process for production of a meat or seafood analog. (After O. B. Smith, in L. D. Hill, ed., Textured Vegetable Proteins, World Soybean Research, Interstate Printers and Publishers, 1976)
Image
from article Food manufacturing
Front view diagram of a horizontal dough mixer.
Image
from article Food manufacturing
Small integrated bread make-up system. A mass of bread dough is placed in the hopper of the divider (right) which cuts it into pieces of uniform weight. The rounder (center foreground) receives the rough pieces from the divider, forms them into…
Image
from article Food manufacturing
Tunnel oven. Loaf-size dough pieces enter the oven at left background and are carried through the baking chamber on a continuous metal belt which serves as the hearth. The baked loaves exit at right foreground. Ordinary pan bread would require sets…
Image
from article Food manufacturing
Schematic for production of shredded wheat biscuits. (After G. A. Leveille and M. A. Uebersax, Fundamentals of food science for the dietician: Wheat products, dietetic currents, vol. 7(1), pp. 1–8, Ross Laboratories, Columbus, Ohio, January–February…
Image
from article Food manufacturing
Small-scale abrasive dehulling machine in (a) upright and (b) dumping positions. (Plant Biotechnology Institute, National Research Council of Canada, Saskatoon)
Image
from article Food manufacturing
Flow chart for the preparation of fish meal, condensed fish solubles, and fish oil from whole fish by using the wet process. (Zapata Haynie Corp.)
Image
from article Food manufacturing
Common market forms of fresh or frozen fish.
Image
from article Food manufacturing
Processing steps in the canning of tuna.
Image
from article Food manufacturing
Schematic sectional view of a fish flesh-separating machine to produce minced fish.
Image
from article Food manufacturing
Image
from article Food manufacturing
Image
from article Risk assessment and management
Risk management and assessment involves solving problems such as the lifetime risk of occupational exposure to radiation from nuclear power reactors. (Copyright © Philip Lange/Shutterstock.com)
Image
from article Risk assessment and management
Risk analysis, assessment, and management.
Image
from article Heterodonta
Common heterodont bivalves. (Credit: Ronald V. Dimock, Jr.)
Image
from article Heterodonta
Common heterodont bivalves. (Credit: Ronald V. Dimock, Jr.)
Image
from article Stripping (chemical engineering)
Stripping column and accessory equipment.
Image
from article Stripping (chemical engineering)
Column operating diagrams. (a) Absorption. (b) Stripping.
Image
from article Phase-locked loops
Basic components of a phase-locked loop.
Image
from article Phase-locked loops
Diode phase detector.
Image
from article Phase-locked loops
Double-balanced phase detector. (a) Circuit. (b) Waveforms.
Image
from article Phase-locked loops
Digital phase/frequency detector. Q = output; Q = inverting output.
Image
from article Phase-locked loops
Loop filter configurations. (a) Passive. (b) Active.
Image
from article Mixer
Linear mixers. (a) Passive linear mixer based on a resistive summing network. (b) Active linear mixer with an operational amplifier.
Image
from article Mixer
Balanced modulator (nonlinear mixer). Only signal paths are shown. Biasing must be added.
Image
from article Restoration ecology
Restored sand dune habitat at Cape Canaveral, Florida. To help prevent erosion, 180,000 shrubs, including grasses, sunflowers, vines, sea grapes, and saw palmettos, were planted. (Credit: Dan Casper/National Aeronautics and Space Administration)
Image
from article Sol-gel process
Flow chart showing the sol-gel methods used to prepare bulk glasses, thin films of glass or ceramics, and powders; the powders are then sintered to produce ceramics.
Image
from article Systems integration
Systems integration activity, showing the architecture for the system.
Image
from article Systems integration
Tactical and strategic perspective of systems integration, showing essential elements.
Image
from article Biological productivity
Image
from article Straight-line mechanism
Classical four-bar linkage straight-line mechanisms: (a) Watt, (b) Russell, (c) Evans, (d) Roberts, (e) Chelbyshev, (f) Peaucellier.
Image
from article Straight-line mechanism
Geared straight-line mechanisms. (a) Cardan circle pair; small-gear diameter = 0.5 large-gear diameter. (b) Standard gear; gear diameter 2 = 0.5 gear diameter 1; gear diameters 3 and 4 are arbitrary.
Image
from article Straight-line mechanism
Translating follower cam mechanism with an instantaneously equivalent slider-crank representation.
Image
from article Straight-line mechanism
Chain/belt–sprocket combination.
Image
from article Supercritical wing
Comparison of airflow about airfoils. (a) Conventional airfoil, Mach number = 0.7. (b) Supercritical airfoil, Mach number = 0.8
Image
from article Electric transient
Resistance and inductance in series.
Image
from article Electric transient
Resistance and capacitance in series.
Image
from article Electric transient
Resistance, inductance, and capacitance in series for three cases.
Image
from article Electric transient
RLC circuit with alternating current source.
Image
from article Electric transient
Causes of electric transients in power systems.
Image
from article Electric transient
Analysis of electric transients involving both harmonic oscillation and traveling waves. (a) Configuration of power system for study of transient recovery voltage (TRV). (b) Model for evaluating steady state before breaker opening. (c) Model for…
Image
from article Electric transient
Graphical interpretation of electromagnetic transients on transmission line. (a–f) Voltage profiles along line. (g) Derived voltage at beginning of line as a function of time.
Image
from article Electric transient
Transient recovery voltages (TRVs). (a) TRVs on source side (vS) and line side (vl). (b) TRV across circuit breaker (vB).
Image
from article Electric transient
Image
from article Surface and interfacial chemistry
Scheme for reducing bacterial adhesion at an implanted biomaterial.
Image
from article Surface and interfacial chemistry
Image
from article Surface and interfacial chemistry
Microscopic surface structures. (a) Surface atoms occupying positions other than the bulk-terminated locations. The first interlayer spacing d12 is greater than the bulk interlayer spacing d34. The second interlayer spacing d23 is smaller than the…
Image
from article Surface and interfacial chemistry
Image
from article Surface and interfacial chemistry
Processes of electron spectroscopies. (a) Auger electron spectroscopy. A core-level electron is ejected by excitation from the incident high-energy electron. A second electron fills the vacancy left by the ejected electron. The third electron, the…
Image
from article Surface and interfacial chemistry
Typical configuration for application of optical spectroscopies to surface analysis. (a) Transmission. (b) External or specular reflection. (c) Internal reflection. I = reflected light intensity. I0 = initial light intensity. θi = angle of incidence…
Image
from article Surface and interfacial chemistry
Scanning tunneling microscopy and images for (a) constant-current mode and (b) constant-height mode; shown only in x dimension for simplicity.
Image
from article Ferrite devices
Plot of magnetic induction B as a function of magnetic field strength H.
Image
from article Ferrite devices
Image
from article Subsonic flight
Flow around an airfoil (a) without circulation and (b) with circulation.
Image
from article Subsonic flight
Flow occurring at small Reynolds numbers (a) around a circular cylinder and (b) around an elliptical cylinder. (From L. Prandtl and O.G. Tietjens, Applied Hydro- and Aeromechanics, Dover, 1934)
Image
from article Subsonic flight
Flow pattern on an airfoil in a real fluid. (a) Low angle of attack, unstalled. (b) High angle of attack, stalled. (From P. P. Ewald, T. Poschl, and L. Prandtl, Physics of Solids and Fluids, Blackie, 1936)
Image
from article Subsonic flight
Dimensionless laminar boundary layer and turbulent boundary layer profiles.
Image
from article Subsonic flight
Boundary-layer growth on a sphere for R > 550,000. The boundary-layer thickness is exaggerated in the diagram for clarity. ( After J. H. Dwinnell, Principles of Aerodynamics, McGraw-Hill, 1949)
Image
from article Subsonic flight
Representation of a rectangular wing by a horseshoe vortex.
Image
from article Fiber crops
Cotton, the most important textile fiber crop grown in the world. (Photo by Gary Kramer, Natural Resources Conservation Service, U.S. Department of Agriculture)
Image
from article Agricultural soil and crop practices
A crop of wheat is harvested by a combine harvester, which is a key machine that helps to implement various agricultural soil and crop practices. (Credit: Orientaly/Shutterstock)
Image
from article Agricultural soil and crop practices
A farmer in a tractor plowing the land for sowing. (Credit: Oticki/Shutterstock)
Image
from article Agricultural soil and crop practices
A tractor pulls a tilling machine. Stubble remains on the cornfield after the previous harvest. The soil must be properly tilled and cultivated for spring planting. (Credit: Lynn Betts, Natural Resources Conservation Service, U.S. Department of…
Image
from article Agricultural soil and crop practices
A cotton stripper, which harvests a cotton crop by stripping both the cotton and bolls from the stalks. (Credit: David Hughes/Getty Images)
