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- Measuring the greenhouse effect accurately
The world as a greenhouse - this is what is shown in the picture on the left: Solar radiation enters the Earth's atmosphere without any hindrance and should normally leave it as heat. Unfortunately...
- Determining the structure of a molecule with laser-induced electron diffraction
In a study recently published in Nature Communication, ICFO (Barcelona, Spain) researchers around Jens Biegert, in collaboration with researchers from Kansas State University, Max-Planck-Institut f...
- World Metrology Day: Power to the constants!
If you come across someone who can tell you by heart and without cheating what a kilogram is after 20 May 2019, beware! It is probably a particular kind of scientist, a metrologist, who is still ov... - Testing the symmetry of space-time by means of atomic clocks
In his Special Theory of Relativity, Einstein formulated the hypothesis according to which the speed of light is always the same, no matter what the conditions are. It may, however, be possible ...
- Fundamental change in the International System of Units
As of today, no one can say how much the small platinum cylinder in a safe in Sèvres near Paris is worth - yet, for over a century, this object has told the world what a kilogram is. Very soon, how... - Transportable optical clock used to measure gravitation for the first time
A European collaboration involving clock experts from the National Physical Laboratory (NPL), the Physikalisch-Technische Bundesanstalt (PTB) and the Istituto Nazionale di Ricerca Metrologica (INRI...
- A revolution in the System of Units, starring the fundamental constants
This revolution has been a long time in the making. Behind it are metrologists working in their scientific laboratories, and scientific managers in their decision-making committees. Now the moment ... - The "atomic second" turns 50
The "atomic second" was the beginning of a revolutionary era: it was born as early as 1955, when the first cesium atomic clock was put into operation. In the fall of 1967, it was included in the In... - Precision measurement on heavy ions contradicts theory
For the first time, a team of researchers under the leadership of TU Darmstadt and with the participation of scientists from the Physikalisch-Technische Bundesanstalt (PTB) has succeeded in measuri...
- Paving the way for the redefinition of the ampere
The universe of physics is experiencing great changes: by 2018, scientists want to place all physical base units on solid, unchangeable foundation in the form of fundamental constants. The units "m... - New developments in measurement techniques for aspheres
Whether we are dealing with space telescopes whose lens systems have to be accurate to the nanometer despite their large dimensions or with cell phone cameras or endoscopes, aspheres are used in in... - Measurement of the dynamic mechanical properties of viscous materials
In microsystems metallic components are increasingly being replaced by those from low-cost polymers. For the thickness measurement of polymers, there is now the DIN standard 32567 available, which ... - Helmholtz Award for work in applied protein analysis and in the measurement of binding energies in helium molecules
In principle, helium doesn't like combining with its ilk at all. Yet, occasionally, it does exactly this, albeit with extremely slight binding energies. Scientists at Goethe University Frankfurt ha... - Non-destructive measurement of the quantum state of a molecular ion
The interaction of thermal energy from the environment with motional degrees of freedom is well known and often referred to as Brownian motion (also thermal motion). But in the case of polar molecu...
- Decay rates of radioactive substances are constant
The distance between the Earth and the Sun has no influence on the decay rate of radioactive chlorine. You could ask: "And why should it anyway?", because it is well known that the decay of radionu... - Optimized spectroscopic studies of ions or atoms by hollow optical fibers
If you want to send light on a trip through optical fibres - with as little loss as possible, you should opt for infrared light, as is the case, for example, in the telecommunication networks world... - New method of precision spectroscopy allows unprecedented accuracy
Quantum logic spectroscopy - which is closely linked with the name of the 2012 Nobel prize laureate, David J. Wineland - has been significantly extended: this new method is called "photon-recoil sp...
- Improving light and heat spectra measurements
Whether you want to investigate objects in space, characterize the quality of light sources, optimize photovoltaics modules or analyze chemical compounds, measuring the spectrum of light- or heat s... - New production method for Graphene
Graphene, a crystal composed of only one layer of carbon atoms arranged in a regular hexagon, is regarded as a material which is believed to be capable of performing miracles, in particular in the ... - Really clean cleanrooms
Extreme purity is a basic prerequisite in the production of semiconductors. The production of minuscule semiconductor components requires a cleanroom to minimize contamination from airborne particl... - Low radon concentrations accurately measurable for the first time
You can't see it, you can't smell it, you can't taste it - but at high doses, it can be lethal: the natural radioactive noble gas radon occurs especially in places where the subsoil consists of gra...
- Award for Concept of Comparability and Traceability of Water Analyses
Clean water is a matter of survival for humans, particularly when it is used for drinking, cooking and for food manufacture. Therefore, the EU member countries have in several guidelines undertaken...