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CDEX listens to the sound of cosmology from a laboratory deep underground


Credit: ©Science China Press
Numerous compelling evidences from astroparticle physics and cosmology indicate that the major matter component in the Universe is dark matter, accounting for about 85% with the remaining 15% is the ordinary matter. Nevertheless, people still know little about the dark matter, including its mass and other properties. Many models predict dark matter particles could couple to ordinary particle at weak interaction level, so it is possible to capture the signal of dark matter particle in the direct detection experiment. The scientific goals of the China Dark matter Experiment (CDEX) are on direct detection of light dark matter and neutrino-less double beta decay with p-type point contact germanium (PPCGe) detectors at the China Jinping Underground Laboratory (CJPL). The measurable energy spectra induced by the elastic scattering between dark matter particles and target nucleons in CDEX detector system could give us the information of dark matter mass, ....

China Jinping Underground Laboratory , Institute Of Theoretical Physics , Chinese Academy Of Sciences , China Dark , Science China Physics , Theoretical Physics , Chinese Academy , Chemistry Physics Materials Sciences , நிறுவனம் ஆஃப் கோட்பாட்டு இயற்பியல் , சீன கலைக்கழகம் ஆஃப் அறிவியல் , அறிவியல் சீனா இயற்பியல் , கோட்பாட்டு இயற்பியல் , சீன கலைக்கழகம் , வேதியியல் இயற்பியல் பொருட்கள் அறிவியல் ,

Reaching your life goals as a single-celled organism


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IMAGE: The single celled organism can detect, in which direction the concentration of nutrients is highest.
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Credit: TU Wien
How is it possible to move in the desired direction without a brain or nervous system? Single-celled organisms apparently manage this feat without any problems: for example, they can swim towards food with the help of small flagellar tails.
How these extremely simply built creatures manage to do this was not entirely clear until now. However, a research team at TU Wien (Vienna) has now been able to simulate this process on the computer: They calculated the physical interaction between a very simple model organism and its environment. This environment is a liquid with a non-uniform chemical composition, it contains food sources that are unevenly distributed. ....

Gerhard Kahl , Institute Of Theoretical Physics , Institute For Theoretical Physics , Theoretical Physics , Benedikt Hartl , ஜெர்ஹார்ட் கால் , நிறுவனம் ஆஃப் கோட்பாட்டு இயற்பியல் , நிறுவனம் க்கு கோட்பாட்டு இயற்பியல் , கோட்பாட்டு இயற்பியல் ,