Search Results

Search Results

Refine this search

3,176 results

Image

from article Rock mechanics

Result thumbnail
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.

Image

from article Rock mechanics

Result thumbnail
(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.

Image

from article Rock mechanics

Result thumbnail
(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…

Image

from article Flax

Result thumbnail
Flax plants (Linum usitatissimum) in bloom. (Photo by Howard F. Schwartz, Colorado State University)

Image

from article Flax

Result thumbnail
Flaxseeds. (Photo by Jose Hernandez, U.S. Department of Agriculture–Natural Resources Conservation Service PLANTS Database)

Image

from article Flax

Result thumbnail
Yellow wilted leaves of flax plants infected by Fusarium oxysporum. (Photo by J. A. Hoes, Oilseed Diseases Image Collection, Western Committee on Plant Disease, Winnipeg, Manitoba, Canada)

Image

from article Flax

Result thumbnail
Blighted and moldy flaxseeds. (Photo by J. A. Hoes, Oilseed Diseases Image Collection, Western Committee on Plant Disease, Winnipeg, Manitoba, Canada)

Image

from article Peppermint

Result thumbnail
Peppermint (Mentha piperita). (Photo by Michael Thompson, Agricultural Research Service, U.S. Department of Agriculture)

Image

from article Citron

Result thumbnail
Citron (Citrus medica), including cross sections of the fruit. (Photo courtesy of California Citrus Clonal Protection Program)

Image

from article Cabbage

Result thumbnail
Cabbage (Brassica oleracea var. capitata). (Joseph Harris Co., Inc., Rochester, New York)

Image

from article Atmospheric acoustics

Result thumbnail
Frequency dependence of attenuation coefficient in units of decibels per 100 m (dB/328 ft), temperature of 20°C (68°F), and a relative humidity of 70%. Total attenuation from air absorption and contributions from classical absorption (that due to…

Image

from article Atmospheric acoustics

Result thumbnail
Diagram of reflection of sound from a flat ground surface with impedance Z, showing direct (R1) and reflected (R2) paths from source to receiver, source height hs, microphone height h, distance of propagation d, and angle of incidence or grazing…

Image

from article Atmospheric acoustics

Result thumbnail
Relative sound pressure levels (SPL) for propagation from a source over mown grass for source height of 1.8 m (6 ft), microphone height of 1.5 m (5 ft), and distances of propagation indicated.

Image

from article Atmospheric acoustics

Result thumbnail
Curved ray paths. (a) Refraction downward, during temperature inversion or downwind propagation. (b) Refraction upward, during temperature lapse or upwind propagation.

Image

from article Atmospheric acoustics

Result thumbnail
Representative long-range ray paths of sound radiating from a source in the atmosphere and traveling from west to east in Northern Hemisphere in winter. 1 km = 0.6 mi. (After T. F. Malone, ed., Compendium of Meteorology, American Meteorological…

Image

from article Atmospheric acoustics

Result thumbnail
Contour plot of sound levels in the presence of upward refraction in a turbulent atmosphere. The source is very close to the ground at zero range. The white areas are regions of higher sound levels.

Image

from article Atmospheric acoustics

Result thumbnail
Facsimile record of acoustic echo sounding of atmosphere at the South Pole, February 9, 1975. 300 m = 984 ft, 600 m = 1969 ft. Dark regions above 300 m altitude correspond to temperature inhomogeneities associated with the passage of convective…

Image

from article Surface waves

Result thumbnail
Definition sketch for an oscillatory wave.

Image

from article Surface waves

Result thumbnail
Fluid particle orbital motions in deep-and shallow-water oscillatory waves. SWL = still-water level.

Image

from article Surface waves

Result thumbnail
Definition sketch for a solitary wave. SWL = still-water level.

Image

from article Surface waves

Result thumbnail
Definition sketch for a surge wave.

Image

from article Layered intrusion

Result thumbnail
Sequence of crystallization from basaltic magma. (a) Hypothetical phase diagram showing the derivation of the sequence olivine cumulate, orthopyroxene-olivine cumulate, orthopyroxene cumulate, as observed in cyclic units near the base of many…

Image

from article Layered intrusion

Result thumbnail
A sequence of layers of near-constant thickness and aspect that show a rather abrupt transition from a base rich in pyroxene (pyroxene-plagioclase cumulate) to a top composed nearly entirely of plagioclase (plagioclase cumulate). Ice axe is…

Learn more about AccessScience

a female college student looking at the screen of her silver-cased laptop computer
Watch the YouTube video

flyer thumbnail

Download the flyerGet Adobe Acrobat Reader pdf icon