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NEC MultiSync E224Wi-BK AH-IPS Monitor

15.10.2013

NEC has announced the NEC MultiSync E224Wi-BK widescreen monitor with AH-IPS matrix. This model, according to the manufacturer, provides wide viewing angles (178 ° vertically and horizontally), the most correct color reproduction and image clarity.

It is also separately noted that the monitor is equipped with a light-emitting diode (W-LED) backlight source, which does not contain mercury and is characterized by low power consumption.

The screen diagonal is 21,5 inches and the resolution is 1920 x 1080 pixels. There is an option to rotate the screen. The monitor's brightness is 250 cd/m2, the contrast ratio is 1000:1, and the response time is 6 ms. The novelty is equipped with ports VGA, DVI-D and DisplayPort. Model with stand measures 507,4 x 364,5-474,5 x 214 mm and weighs 5,9 kg.

The NEC MultiSync E224Wi-BK monitor will be available at the end of October for $199. The product comes with a 3-year warranty.

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A new value for the upper limit of the neutrino mass has been established 23.12.2019

An international team of researchers using a new highly sensitive spectrometer has found a new upper limit on the mass of elusive neutrino particles. Until recently, it was believed that neutrino particles do not have mass at all, but the results of some studies indicate the fallacy of such a judgment. And, of course, the next logical step should be to determine this mass, and this is done by gradually narrowing the range between the upper and lower limits of this value.

Scientists have long been able to find evidence that the mysterious neutrino particles exist in reality, their number, according to assumptions, is a billion times greater than the number of atoms in the universe. However, despite such an abundance of these particles, scientists have only made limited progress in studying their properties. And these properties must include a lot for our understanding of the physics of processes occurring at the smallest level.

Let us return to the measurement of the neutrino mass. There are currently three different methods for this. The first method uses the analysis of cosmic microwave background radiation, the second method is looking for very rare cases of neutrinoless double beta decay of certain elementary particles, and the third method is to try to directly measure the neutrino mass in exotic ways that do not rely on any of the existing theoretical models.

It is this third method of measuring the neutrino mass that was used by scientists working in the framework of the KATRIN (Karlsruhe Tritium Neutrino Experiment) experiment conducted by researchers from the Karlsruhe Institute of Technology in Germany. The key instrument of this experiment is a huge 200-ton electron spectrometer, which is used to study the decay of tritium, a radioactive isotope of hydrogen. When tritium decays, it creates a single electron and a neutrino at the same time. Knowing the initial energy of tritium and measuring the energy of this electron using a highly sensitive spectrometer makes it possible to calculate the neutrino mass with a sufficiently high accuracy, exceeding the accuracy of previous similar measurements.

The data collected during the experiment indicated that the value of the upper limit of the neutrino mass is 1.1 electron volts, which is approximately half of the value previously determined. And this, one might say, is a very small mass, which is 500 thousand times less than the mass of an electron, which also cannot be called a large and heavy particle.

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