The probability of stimulated emission varies with wavelength, and the process concentrates emission at wavelengths where that probability is the highest.
Thermophotonics is a recent development of this concept where the emitter is "active", namely a heated diode, increasing the rate of energy transfer for a given emitter temperature and concentrating emission in an energy range more suited for conversion by the receiver.
A CO2 emission in construction materialization stage is the key research point of architectural life cycle assessment, which is concentrated in emission time and in absolute emission volume.
When analysing objects in heritage collections, it may be necessary to enclose the treated object into a suitable container (plastic/glass storage box, or 'tent' around the object) to isolate and concentrate any emissions from the material surface.
In the context of Switzerland's climate policy and thus concentrating on emissions that are an important part of firms' energy use, these firms may be exposed to the risk of carbon leakage the reallocation of energy-intensive production processes to countries with laxer environmental policies20.
One paper concentrated on fugitive emissions, but the other main highlight was the effort required to break down communication barriers to prevent gross wastage of energy resources and consequent unnecessary emissions.
It mapped the sky in the 511-kiloelectron-volt emission line that arises from electron-positron annihilation and found that the emission is concentrated toward the centre of the Milky Way Galaxy.
Their radio emission is concentrated along a narrow cone, producing a series of pulses corresponding to the rotation of the neutron star, much like the beacon from a rotating lighthouse lamp.
Since the emission is concentrated in a very compact region (with typical size r⩽0.1 pc) and it is not possible to obtain resolved images of the source, spectroscopic studies of this radiation represent the only valuable key to constrain the physical properties of matter and its structure in the center of active galaxies.
Treatment of the cells with [Ru] (20 μM) and PhSH (100 μM) for 20 min led to the characteristic staining of ethidium bromide in the red channel, with the emission mainly concentrated in the nuclei and nucleoli (Fig. 9f), while almost no signal was observed in the green channel (Fig. 9d), suggesting that the uncaging had been very efficient.
