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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 ,

Sidharth, man with an eye to the cosmos, leaves BPSM; plans to continue research


Sidharth, man with an eye to the cosmos, leaves BPSM; plans to continue research
By M Somasekhar|   Updated: 29th April 2021 5:19 pm IST
M Somasekhar
The Birla Planetarium and the Science Museum are part of the tourist circuit of Hyderabad for decades. Perched on a hillock, right in the heart of the city, one can take a seat and go on a quick and exciting trip into outer space through the shows that run at the Planetarium.
The man, who led teams that transformed the ‘Naubat Pahad’ into a modern science complex, attracting hundreds of common people to a good number of Nobel laureates and scientists over the last 35 years is Dr B G Sidharth. ....

Andhra Pradesh , Science City , Novosibirskaya Oblast , West Bengal , Dakshin Gangotri , P Vaman Rao , Francis Crick , Jayant Narlikar , Nt Rama Rao , Tony Leggett , Venkatraman Ramakrishnan , Satish Dhawan , Naubat Pahad , Marri Channa Reddy , Pranav Sharma , Fred Hoyle , Steven Chu , James Watson , William Daniel Philips , Claude Cohen Tannoudji , Sergie Haroche , Nobel Committee , Indian Space Research Organisation , Science Centre , Bm Birla Planetarium Science Centre , Space Museum ,

The indestructible light beam


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IMAGE: A scattering-invariant mode of light is generated by sending a laser beam onto a judiciously configured spatial light modulator (see quadratic pixel array on the left). This modulated beam then.
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Credit: Allard Mosk/Matthias Kühmayer
Why is sugar not transparent? Because light that penetrates a piece of sugar is scattered, altered and deflected in a highly complicated way. However, as a research team from TU Wien (Vienna) and Utrecht University (Netherlands) has now been able to show, there is a class of very special light waves for which this does not apply: for any specific disordered medium such as the sugar cube you may just have put in your coffee tailor-made light beams can be constructed that are practically not changed by this medium, but only attenuated. The light beam penetrates the medium, and a light pattern arrives on the other side that has the same shape as if the medium were not there at all. ....

Wiedner Hauptstra , Stefan Rotter , Jeroen Bosch , Allard Mosk , Utrecht University Netherlands , Institute Of Theoretical Physics , Institute For Theoretical Physics , Allard Mosk At Utrecht University , Utrecht University , Theoretical Physics , Big Dipper , Nature Photonics , Chemistry Physics Materials Sciences , ஸ்டீபன் ரோட்டார் , அலார்ட் மசூதி , அட்ரெக்ட் பல்கலைக்கழகம் நெதர்லாந்து , நிறுவனம் ஆஃப் கோட்பாட்டு இயற்பியல் , நிறுவனம் க்கு கோட்பாட்டு இயற்பியல் , அட்ரெக்ட் பல்கலைக்கழகம் , கோட்பாட்டு இயற்பியல் , பெரியது டிப்பர் , இயற்கை ஃபோட்டானிக்ஸ் , வேதியியல் இயற்பியல் பொருட்கள் அறிவியல் ,