linkedin post 2021-06-02 04:21:32
Floral structures are insatiable for form diversity. View in LinkedIn
linkedin post 2021-06-02 04:19:35
NO KNOWLEDGE IS A PRIORI. “Indeed, for Quine, nothing is knowable a priori. The thesis is that everything in the web— the mundane beliefs about the physical world, the scientific theories, the mathematics, the logic, the connections of meaning—is up for revision if the "data" become sufficiently recalcitrant.” https://lnkd.in/dWBTyPy View in LinkedIn
linkedin post 2021-06-02 04:18:34
SAVING THE 2ND LAW. “Historically, the idea to associate the black-hole surface area with entropy was suggested by Bekenstein in order to save the validity of the second law of thermodynamics in a gedanken experiment in which an entropy-bearing object falls into a black hole.” https://lnkd.in/d3sfhP6 View in LinkedIn
linkedin post 2021-06-02 04:17:45
QED. “One learns that the (generalized) hoop conjecture, together with Bekenstein’s universal entropy bound, ensure the validity of the GSL...in the dangerous regime.” (GSL = the generalized second law of thermodynamics). https://lnkd.in/d3sfhP6 View in LinkedIn
linkedin post 2021-06-04 04:03:44
SOFTWARE. “The robot at the automobile factory is supplied with metal and plastic but can make nothing useful without copious instructions telling it which part to weld to what and so on.” https://lnkd.in/draqjTW View in LinkedIn
linkedin post 2021-06-04 04:02:59
MATTER, ENERGY AND INFO. “Ask anybody what the physical world is made of, and you are likely to be told matter and energy. Yet if we have learned anything from engineering, biology and physics, information is just as crucial an ingredient.” https://lnkd.in/draqjTW View in LinkedIn
linkedin post 2021-06-04 04:00:37
WE CONTINUE with Professor Jacob D Bekenstein, the star of the past series of posts, with a paper that audaciously suggests that the evidence points to a universe as a giant hologram. This is a beautifully articulated article written for the non-specialist — but, dear reader — after surviving the past two dizzyingly technical papers as primers, this should be a breeze! https://www.scientificamerican.com/article/information-in-the-holographic-univ/ View in LinkedIn
linkedin post 2021-06-05 04:50:51
CAUSE OF ZIG-ZAG. The unusual backbone is associated with guanosine residues which have an unusual conformation. NMR studies in solution have shown that purine residues can adopt the syn and anti conformations with equal ease. Another difference is found in the pucker of the sugar ring.” https://link.springer.com/content/pdf/10.1007/978-94-009-7052-6.pdf View in LinkedIn
linkedin post 2021-06-05 04:50:00
ZIG-ZAG ALTERNATION. “The left-handed helix has the phosphates arranged in a zig-zag array; hence the name Z-DNA. The same Z structure has been found in crystals of tetramers d(CpGpCpG) as well as in other hexamer crystals.” https://link.springer.com/content/pdf/10.1007/978-94-009-7052-6.pdf View in LinkedIn
linkedin post 2021-06-05 04:48:32
FRAGMENT FROM NATURE continues from last weekend and concludes this weekend on a paper from the early days of untangling the structure of DNA, by Professor Alexander Rich from MIT, featuring the unraveling of left handed DNA. The story is written in crystal clear language, with unyielding logic, an historical milestone. https://link.springer.com/content/pdf/10.1007/978-94-009-7052-6.pdf View in LinkedIn