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Sunday, September 26, 2021

3.050 - AMICOR (24)

 AMICOR 3.050 em construção

#Dra. Valderês A. R. Achutti (*13/06/1931+15/06/2021)

Em Wasington, março 1996 - Encobrindo o obelisco...

From: Pocket collections

 Every Planet in the Solar System

A guided tour of our planetary neighborhood, from mysterious Mercury to the dwarf planet Pluto and the search for the elusive Planet Nine. 
Pocket Collections

Mercury is shrinking. Venus may once have been as fit for life as Earth. It rains diamonds on Neptune. Get to know the planets beyond ”My Very Excellent Mom Just Served Us Noodles” with one fascinating thing to read about each of the eight, or, depending on who you ask, nine worlds in our Solar System. Yes, we’re throwing Pluto a bone.

#From:  Science News

 10 scientific surprises of Science News’ first 100 years

Antimatter, dark energy, plate tectonics and the role of DNA were unexpected discoveries

black and white photograph of Edwin Hubble looking into a telescope


n 1929, Edwin Hubble (shown here at Mount Wilson Observatory) showed that more distant galaxies were flying away from us faster than nearby galaxies, which suggested an expanding universe.

PICTORIAL PRESS LTD/ALAMY STOCK PHOTO

From the day Archimedes cut his bath short to shout “Eureka,” science has been a constant source of surprises. 
Even after the abundant accumulation of knowledge in the intervening two millennia, science still retains the capacity to astonish, and the century since Science News began reporting has produced its share of shocking discoveries. Some such surprises happened suddenly (if not necessarily with eureka moments); in other cases, revolutionary shifts in understanding took a while to seep slowly into general scientific awareness.
In either case, Science News was sooner or later on the job during the last 100 years, identifying and reporting the never-ending series of surprises, too numerous to mention here, except for my Top 10./;../

Sunday, September 19, 2021

3.049 - AMICOR (24)

 AMICOR 3.049  

#Dra. Valderês A. R. Achutti (*13/06/1931+15/06/2021)

V. Antonietta na capela de Sto Antônio. Lisboa, 1995. 

#From: ACADEMIA

Your Top Paper

Paper Thumbnail
Gramado Declaration: The Impact of 20 Years of Cardiovascular Prevention
Aloyzio Achutti byAloyzio Achutti, Universidade Federal do Rio Grande…
Health Promotion • Brazil • Humans • Time Factors + 3 more
Publicado com Ricardo Dtein, Lucia Pellanda e Bruce Duncan
Instituto Olavo Bilac em Santa Maria - 120 anos
Notícia do dia 20/09/2021
Minhas irmãs Lia Maria e Maria Helena foram alunas, enquanto se chamava Escola Normal O.B. Valderês em 1951 foi aluna da primeira turma de Científrico noturno, concluíndo em 1953, vindo então para Porto Alegre.



#From: TWEETER

#Guido Cechella Isaia (10/06/1938 +21/09/2021)
Mais uma perda: um primo muito querido.


#Da: Orquestra Sinfônica do Instituto de Artes da UFRGS
Vídeo de divulgação da Orquestra do Instituto de Artes da UFRGS, da qual sou chefe de naipe da percussão 
Área de anexos
#From: Andrea Wulf

Para minha irmã Profa. Dra. Maria Helena C.A. que é Pós Graduada em Botânica, nos seus noventa e um, dei-lhe este livro, que agora estamos apreciando em conjunto. O que ela lê, comenta comigo em nosso encontro diário por vídeo. Eu tinha admirção pelo nome do Humboldt, mas sabia pouco de sua história. Esta Andrea Wulf está nos contando. Ela é autora premiada de vários livros sobre jardins e história natural.Nasceu na India, foi criada na Alemanha e agora vive na Inglaterra.

Alexander von Humboldt chamou atenção sobre a importância das florestas no enriquecimento da atmosfera e do controle da distribuição de água nos solos, humidade e temperatura ambiente, importância em evitar erosão dos solos, e o possível impacto imprevisível para as próximas gerações..

Thomas Jefferson o chamou de “um dos mais excelentes ornamentos de nossa época” Charles Darwin escreveu que “nada estimulou mais de formatão ardorosa o meu entusiasmo quanto a leitura na Narrativa Pessoal” dele. Sem ele não teria embracado no Beagle, tão pouco teria cocebido A origem das espécies.

William Worsworth, Samuel Taylor Coleridge e Henry David Thoreau, incorporaram seus conceitos de naturalista em suas poesia e outras obras (Walden) Simón Bolivar o chamou de “o descobridor do Novo Mundo”. Johann Wolfgang von Goethe, declarou que passar alguns dias com ele foi como “ter vivido vários anos”.

Nasceu em 14 de setembro de 1769 e morreu em 1859. Gerou inveja em Napoleão Bonaparte.

Ele dizia que “a Terra é um só organismo interconectado que pode ser catastroficamente danificado por nossas próprias ações” (NY Times)


#From: Nature

A meander around many circulatory systems

Horseshoe Crab in Mangroves, Limulus polyphemus, Cancun, Yucatan, Mexico.

Horseshoe crabs’ blood is blue: their oxygen-transport protein is copper-based.Credit: Getty

Pump: A Natural History of the Heart Bill Schutt Algonquin (2021)

Rich in meaning and metaphor, the word ‘heart’ conjures up many images: a pump, courage, kindness, love, a suit in a deck of cards, a shape or the most important part of an object or matter. These days, it also brings to mind the global increase in heart attacks and cardiovascular damage that attends COVID-19. As a subject for a book, the heart is an organ with a lot going for it.

Enter zoologist Bill Schutt. His book Pump refuses to tie the heart off from the circulatory system, and instead uses it to explore how multicellular organisms have found various ways to solve the same fundamental challenge: satisfying the metabolic needs of cells that are beyond the reach of simple diffusion. He writes of the co-evolution of the circulatory and respiratory systems: “They cooperate, they depend on each other, and they are basically useless by themselves.”/.../

#From: Quanta Magazine
My Bookmarks

EVOLUTION | ALL TOPICS

 

Single Cells Evolve Large Multicellular Forms in Just Two Years

By VERONIQUE GREENWOOD

Researchers have discovered that environments favoring clumpy growth are all that’s needed to quickly transform single-celled yeast into complex multicellular organisms.

Read the article

COMBINATORICS

 

Mathematician Answers Chess Problem About Attacking Queens

By LEILA SLOMAN

The n-queens problem is about finding how many different ways queens can be placed on a chessboard so that none attack each other. A mathematician has now all but solved it.

Read the blog

Related: 
A Child’s Puzzle Has Helped
Unlock the Secrets of Magnetism

by Marcus Woo (2019)

DEVELOPMENTAL BIOLOGY

 

Mathematical Analysis of Fruit Fly Wings Hints at Evolution’s Limits

By ELENA RENKEN

A painstaking study of wing morphology shows both the striking uniformity of individuals in a species and a subtle pattern of linked variations that evolution can exploit.

Read the blog

Related: 
What Is an Individual? Biology
Seeks Clues in Information Theory. 

by Jordana Cepelewicz (2020)

QUANTIZED ACADEMY

 

The Simple Math Behind the Mighty Roots of Unity

By PATRICK HONNER

Solutions to the simplest polynomial equations — called “roots of unity” — have an elegant structure that mathematicians still use to study some of math’s greatest open questions.

Read the column

Related: 
Mathematicians Find Long-Sought
Building Blocks for Special Polynomials

by Kelsey Houston-Edwards

Around the Web

Lost in the Dark
The universe seems to be expanding too quickly, according to clashing measurements. Now, two studies find that the source of the conflict may lie in the past, possibly in a form of dark energy that no longer exists, Davide Castelvecchi reports for Nature. Early dark energy” is just one way to speed up the universe’s expansion. Thomas Lewton reported on it, along with decaying dark matter and other proposals, for Quanta last year.


Coral, a Climate Canary
Half of the ocean’s corals have died since 1950, Corryn Wetzel reports for Smithsonian Magazine, causing the ecosystems’ biodiversity to plunge by nearly two-thirds. Corals’ climate sensitivity lets researchers use the marine relics to understand past oceans and to predict their future, Elizabeth Svoboda reported for Quanta in 2018.
#From: Pfizer



#From: TIME
Mars is the solar system's near-miss world. Thanks to data from rovers and other spacecraft, we know that the Red Planet once fairly sloshed with water—with dry deltas, riverbeds, and sea basins stamped into its surface. But 4 billion years ago, the Martian core cooled, shutting down the dynamo that sustained its magnetic field. That left the planet vulnerable to the solar wind, which clawed away the atmosphere, and allowed the Martian water to escape into space.
NASA/JPL-Caltech/MSSS

NASA's Perseverance Mars rover took this selfie on Sept. 10, 2021, the 198th Martian day, or sol, of its mission. Two holes can be seen where the rover used its robotic arm to drill rock core samples.