An experimental study involves taking measurements of the system under study, manipulating the system, and then taking additional measurements using the same procedure to determine if the manipulation has modified the values of the measurements.

These could be intrusive technologies, such as sampling within ductwork, taking smears for subsequent radio chemical analysis or taking direct radiometric and other measurements from facility effluents.

National measurements

Regional measurements

International measurements

Measurements of achievement

Measurements are taken between peristaltic waves.

Based on measurements of the expansion using Type Ia supernovae, measurements of temperature fluctuations in the cosmic microwave background, and measurements of the correlation function of galaxies, the universe has an estimated age of 13.798 0.037 billion years.

Most measurements are from birds raised in captivity, so determining if there are any major differences in measurements between wild and captive condors is difficult.

A uniform, she said, and asked for my measurements.

Sets of surface measurements are important data to meteorologists.

In all cases it is confirmed with ECG measurements.

The total skull size is the sum of these two measurements.

Some measurements are selected, and are applied to a population sample.

The study examined the existing measurements, taken for regulatory monitoring purposes.

Given a model of the density, the gravity measurements at the surface can be predicted but in an inverse problem the gravity measurements are known and the density must be inferred.

We know from measurements that greenhouse gases are accumulating in Earth s atmosphere.

As a result, the length measurements of many rivers are only approximations.

ISO 1 helps in comparing measurements by defining such a reference temperature.

The past twelve months was the hottest 12 month period since measurements began.

He was the first to suggest using wavelengths of light to standardise measurements.

Monitoring of air pollution is carried out through measurements in seven eco posts.

It also provided guidance on technical capabilities necessary for performing measurements and analysis.

The measurements taken at a weather station can include any number of atmospheric observables.

At the time the measurements were conducted by attaching a thermograph to a kite.

ISO 5 is an international standard for density measurements in photography and graphic technology.

Without information about the averaging volume used, comparisons between different measurements cannot be made.

Measurements were made when the warheads were in various levels of containment and shielding.

Measurements made on items containing weapons components may contain defence or proliferation sensitive information.

We have obtained topographic measurements of the surface of Mars. We understand the elevation differences.

Initial measurements show very good agreement between experimental values and calculations based on quantum theory.

The following are the key measurements that would be made by the science spacecraft, Sancho

Detailed radiation measurements on the ground and from satellites have since proved the greenhouse effect s existence.

In neuroscience, it includes measurements of the electrical activity of neurons, and particularly action potential activity.

You can do this in nine steps, Take measurements on the right side of the body.

Measurements in the table refer to the dimensions of the washers as described by the drawing.

On April 20, 2005, a level of was recorded, the highest ever since the measurements began.

These observations constitute a valuable knowledge base associated with verification measurements and on site inspection protocols.

Nor do we hear that the Antarctic is experiencing record sea ice coverage since satellite measurements began.

At the end of approximately 6 years of follow up, CIMT measurements were correlated with cardiovascular events.

For example, gravity measurements are used to obtain a model of the density profile under the surface.

These have included passive gamma ray spectrometry, passive and active neutron coincidence counting and neutron multiplicity measurements.

For the thermal model, it would also be necessary to make measurements in the thermal infrared region

British physicist John Tyndall, in the 1850's, made laboratory measurements of the infrared radiation, which is heat.

The security measurements they use include ID check, physical check, passing through examination machine (the settlers are excluded).