新着おすすめピックアップ - 51416966とその連想画像，2013.2.1の写真素材

U.S. space station Skylab (occupied 1973-74), shown with docked Apollo Command and Service modules.

Space station Mir, after its completion in 1996, with the launch dates of each modular component shown.

The Apollo program: the Saturn V launch vehicle and configurations of the spacecraft modules at launch and during the journey.

Apollo mission profile for a lunar landing and return, outlining the various stages along the mission.

Basic characteristics of orbits in which a satellite can be placed around Earth, categorized by inclination, shape and altitude.

The journey of the Galileo spacecraft to Jupiter, highlighting major observations along the trajectory, as well as their dates.

U.S. space shuttle, composed of a winged orbiter, an external liquid-propellant tank, and two solid-fuel rocket boosters.

Aurora Australis

Blower-scavenged, two-stroke-cycle engine with uniflow scavenging, displaying both upstroke and downstroke.

Four types of gasoline engines: opposed-piston engine, rotary engine, in-line engine, and V-type engine.

Cross section of a V-type engine.

Diesel engine equipped with a precombustion chamber.

Georges Leclanche's dry cell and its later variations, zinc chloride and alkaline cells, are batteries commonly used worldwide.

Modern version of the Leclanche cell. This heavy-duty zinc-carbon primary battery is a dry cell with an immobilized electrolyte.

In Ptolemy's geocentric model of the universe, the Sun, Moon, and each planet orbit a stationary Earth.

Seismic ray types in Earth's interior from earthquake at F.

Theoretical depiction of the movement of tectonic plates across Earth's surface.

Electrical conduction in the heart in healthy individuals is controlled by pacemaker cells in the sinoatrial node.

The process of cell division by mitosis.

Average exchange of energy between the surface, atmosphere, and space, as percentages of incident solar radiation.

General patterns of atmospheric circulation over an idealized Earth with a uniform surface and the actual Earth.

The Michelson interferometer measures the effect on the speed of light of the motion of the ether through which light travels.

Basic components of an electrochemical cell.

Automotive-type lead-acid battery, a storage battery that holds its charge for a long time and can be recharged.

Three types of natural selection, showing the effects of each on the distribution of phenotypes within a population.

Evolutionary history of the globin genes. The dots indicate the duplication of ancestral genes, giving rise to new gene lineage.

The steps involved in the engineering of a recombinant DNA molecule.

The components of a scanning electron microscope (SEM).

The components of a transmission electron microscope (TEM).

The diffusion of water across a semipermeable membrane.

The diffusion of potassium cations across a semipermeable membrane.

Changes in ion permeance underlying the action potential.

Diagram depicting the process of atoll formation. Atolls are formed from the remnant parts of sinking volcanic islands.

Differentiation of the external genitalia in the human embryo and fetus.

Diagram of a mammalian muscle spindle.

Fission bomb designs

Thermonuclear warhead

Electromagnetic spectrum. The visible range (shaded portion) is shown enlarged on the right.

The gasoline carburetor is a device that introduces fuel into the airstream as it flows into the engine.

The sequence of events in a four-stroke diesel engine involves a single intake valve, fuel-injection nozzle, and exhaust valve.

Cutaway view of a typical construction of a miniature power cell, as in a zinc-silver oxide or zinc-mercuric oxide system.

A fuel cell (actually a group of cells) has essentially the same kinds of components as a battery.

Phylogeny based on differences in the protein sequence of cytochrome c in organisms ranging from Neurospora mold to humans.

Coriolis force

Theoretical diagram showing the effects of an advancing tectonic plate on other adjacent, but stationary, tectonic plates.

Laser Interferometer Space Antenna (LISA), a Beyond Einstein Great Observatory, is scheduled for launch in 2015

Seasons change because more direct sunlight falls on some parts of Earth than others at different times of the year.

The weather model of meteorologist Edward Lorenz.

Light waves matching the orientation of the molecules of a polarizing filter are absorbed, reducing the intensity of the light.

Uniformly accelerated motion; s = speed, a = acceleration, t = time, and v = velocity.

The artery wall and the ultrastructure of the smooth muscle cells within it.

Approaching the speed of light, an object appears shorter, with a longer time interval, relative to its intervals when at rest.

The 4-D space-time continuum is distorted in the vicinity of any mass, depending on the mass and the distance from the mass.

A cutaway view shows how light passes through the lenses and prisms of binoculars.

The four strokes of a four-stroke cycle engine - intake, compression, power, and exhaust. Only the intake stroke delivers power.

Nickel (hydroxide)-cadmium cell of “jelly roll” construction. This rechargable battery is commonly used in portable devices.

Cutaway view of an alkaline-manganese dioxide power cell.

An internal-combustion engine goes through four strokes: intake, compression, combustion (power), and exhaust.

Typical gasoline engine cooling system.

Typical gasoline engine lubrication system.

Rising air in an unstable atmosphere

Bohr atomic model

Electron shell

Schematic drawing of the structure of a typical bacterial cell of the bacillus type.

Annual circulation patterns in a dimictic lake: stratification in the summer and complete overturn in the autumn and spring.

Four main types of estuaries: A) salt wedge estuary, B) partially mixed estuary, C) vertically homogeneous estuary, D) fjord.

Vegetation profile of a temperate deciduous forest.

Vegetation profile of a desert.

Vegetation profile of tropical mountain lands.

Cross section of a typical bomb calorimeter.

Stages in the process of meiosis, cell division among sexually reproducing organisms.

Receptor-mediated endocytosis enables cells to ingest molecules such as protein that are necessary for normal cell functioning.

The endoplasmic reticulum plays an important role in the biosynthesis, processing, and transport of proteins and lipids.

Transverse section of an artery.

Human arterial supply and venous drainage of the organs.

The stages in the evolution of a wave (frontal) cyclone.

Diagram of a wave system depicting typical divergence and convergence distributions for non-tilting and tilting systems.

Horizontal divergence and convergence patterns associated with the polar-front jet.

The onset and retreat of the West African monsoon with respect to the timing of the direct rays of the sun.

Diagram of a two-cavity klystron, used as an amplifier and RF signal source at microwave frequencies, and also as an oscillator.

Elements of a magnetron, used to generate power for radar systems, microwave ovens, plasma screens, and linear accelerators.

Elements of the traveling-wave tube (TWT), used to amplify microwave signals over broad bandwidths.

A tokamak is a toroidal magnetic confinement system used as a method of achieving fusion energy.

The Hardy-Weinberg Law applied to two alleles.

Two types of pressure gauge: the U-tube manometer and the Bourdon-tube gauge.

Diagram of a human uterus during the fourth month of pregnancy.

The analysis of sound frequencies by the basilar membrane.

Asteroid distribution

Displacements in the Earth in four types of free vibrations.

Earth's prebiotic and modern atmosphere

Pay-off matrix showing bourgeois, or mixed attack/retreat behaviour, as the most stable strategy for a population.

Diagram of an artificial pacemaker

Polar covalent bond

Vegetation profile of a boreal forest. The tree layer consists mainly of conifers, and mosses are the predominant ground cover.

Cross section of a crystal microphone.

Pluto and the Kuiper belt

Compton effect

Zonation of the ocean. Note that in the littoral zone the water is at the high-tide mark.

Vegetation profile of a grassland.

A grid-connected solar cell system.

Types of faulting in tectonic earthquakes.

The two sensory organs of balance: the cristae of the semicircular ducts and the maculae of the utricle and saccule.

Blood alcohol concentration

Blood alcohol concentration

Relationships of endocrine glands, from the pituitary-hypothalamus system to the vertebrate endocrine glands and their hormones.

The mechanical components of a compound microscope.

Image formation in a microscope, according to the Abbe theory.

A cross section of Earth's outer layers, from the crust through the lower mantle.

Moon interior

Venus's middle and lower atmosphere

Pluto-Charon mutual eclipses

Jupiter's atmosphere

Near-Earth objects

Uranus's orbit

Speedometer

Spring balance

Nuclear blast and radiation effects

Valley and mountain breezes

Diagram showing a healthy heart valve compared with a diseased heart valve and an artificial heart valve.

Comparison of a normal heart to one with a ventricular septal defect

Diagram demonstrating the difference between a normal heart and a heart with an atrial septal defect

Annual temperature and precipitation patterns for several locations with different climatic conditions.

The surface reflectance differences between a pre-agricultural (forest) and a modern agricultural (patchwork heating) landscape.

Gyrotron, electrons from the cathode acquire cyclotron rotation in the cavity.

Solar cells, whether used in a central power station, a satellite, or a calculator, have the same basic structure.

An electron (e) in a solar cell interacting with light and dissipating excess energy is analogous to a child playing on a slide.

Proton exchange membrane (PEM) fuel cell.

Generated by an undersea earthquake, a tsunami may propagate over open ocean waters before cresting and inundating a coastline.

A heart-lung machine diverts blood from the body to an oxygenator, which removes CO2, adds O2, and returns the blood to the body

The age of Earth's oceanic crust, as measured in millions of years.

The Hawk-Dove model of game theory, illustrating the costs and benefits of fighting over resources.

The relationship between hot springs and epithermal veins.

Weathering frees heavy minerals from their matrix, washing them down slope where flowing water forms them into placer deposits.

When monochromatic light passes through two narrow slits to illuminate a screen, it creates a pattern of bright and dark bands.

When monochromatic light passing through a single slit illuminates a screen, a characteristic diffraction pattern is observed.

Ionic bond

An illustration representing Isaac Newton's equation for reconciling different frames of reference, x' = x - vt (t equals time).

Simultaneous events may seem to coincide in time for one observer but not another due to differences in their spatial positions.

A illustration of the invariance of the speed of light, one of the postulates of Albert Einstein's theory of special relativity.

Cross section comparing the left ventricular wall of normal heart to a left ventricular wall that has experienced hypertrophy.

Van Allen radiation belt

Layers of the ionosphere

Operating principle of a parallel-flow heat exchanger.

Obtaining approximate measurements through the use of differentiation and integration.

Greenhouse effect on Earth

Electrocardiogram of the alternating contractions during one heartbeat and a diagram of the heart's impulse-conducting system.

The first reduction for an n-person voting game theory, illustrating the strategies least suitable for each participant.

Genetic differentiation between populations of Drosophila willistoni.

In 1849, French physicist Armand Fizeau used this method to achieve the first terrestrial measurement of the speed of light.

Vector addition

Part of the elliptic paraboloid z = x2 + y2 which can be generated by rotating the parabola z = x2 (or z = y2) about the z-axis.

Hyperboloids of (left) one sheet and (right) two sheets.

Duality associates with the point P the line RS, and vice versa.

Illustration of a continuous and a discontinuous function.

The hyperbolic functions cosh x and sinh x.

(Left) Pieces of a surface given by f(x, y) = 0; (right) if the surface is cut along the curves, an octagon is obtained.

A conchoid curve results from connecting points drawn at standard distance a from line LN on all lines extending from point P.

Nicomedes (3rd century BCE) discovered a special curve, known as a conchoid, with which he was able to trisect any acute angle.

Several points are labeled in a two-dimensional graph, known as the Cartesian plane.

The figure shows part of the graph of the polynomial equation y = 3x4 - 16x3 + 6x2 + 24x + 1.

In following the circle around the Mobius band, the line L twists, and the lines cannot be made to point in the same direction.

The solution to the problem of doubling the volume of a cube, as proposed by Menaechmus in the 4th century BC.

The circulation of nitrogen in various forms through nature, a process essential to life on Earth.

The generic layout for solitaire games is shown along with the specific layout of the klondike solitaire variant during play.

The life cycle of a malaria parasite, from its stages within the body of a mosquito to those within the body of a human.

In the law of reflection, images are reflected from a smooth surface at the same angle (q2) as the incidence angle (q1).

The Munsell colour tree, a 3-D representation of the Munsell system, which defines colours by scales of hue, value, and chroma.

Stock anchor

Stockless anchor

Vector addition and subtraction

Vector right hand rule

Cross section of the right kidney showing the major blood vessels.

Tangent relationships

Hip and pelvis

Proof that the area of a triangle = 1/2 base x height.

The three families of conic sections (ellipse, parabola, and hyperbola) result from intersecting a plane with a double cone.

Representation of an ellipsoid, a closed surface such that its intersection with any plane will produce an ellipse or a circle.

Comparison of cross-sections from a CD and from a DVD, illustrating the reason for the greater capacity of a DVD.

Oregon spotted frog (Rana pretiosa)

Anemometer

Compound pier

Geodesic dome

Basic features of a modern road bicycle.

Glycolysis, the dissolution of sugar, is carried out in the cytoplasm of cells.

Electrostatic precipitator, a common particle collection device at fossil-fuel power-generating stations.

A saddlepoint, or entry, in a payoff matrix at which the expected gain of each participant has the highest guaranteed payoff.

In variable-sum games each payoff depends on both players' actions, so each matrix entry lists two payoffs, one for each player.

The second reduction for an n-person voting game theory, illustrating the strategies least suitable for each participant.

The normal, or perpendicular, at each point of a surface defines the corresponding tangent plane, and vice versa.

Each point on the Riemann sphere corresponds to a point on the plane. The ray tangent to the north pole corresponds to infinity.

Schematic diagram of a fluidized-bed combustion boiler.

Double refraction showing two rays emerging when a single light ray strikes a calcite crystal at a right angle to one face.

The first example of a system of linear equations in the Nine Chapters.

A cross section of the embryonic disk, showing formation of the neural tube.

A cross section of the lower cervical segment of the spinal cord, showing cytoarchitectural lamination.

In the Vienna coup, a high card must be played early, subjecting the player to a squeeze that otherwise could not have been.

The Whitfeld six, bridge's most famous double-dummy problem, was named for its founder and for the number of cards in each hand.

Carpal tunnel syndrome

Salisbury cathedral

The brewing process, which turns barley and hops into the alcoholic beverage of beer.