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#Com Dra. Valderês A. Robinson Achutti (13/06/1931+15/06/2021)
Visitando um parque no Japão em maio de 2001
#Re-Publicando artigos antigos meus
TRAGÉDIA HUMANA (nos dias da queda das torres gêmeas:11/09/2001) Aloyzio Achutti.
O horror dos últimos dias que a todos nos chocou, não foi somente uma tragédia Americana, mas é um desastre para a humanidade. As pessoas diretamente afetadas e suas famílias certamente merecem nossa compaixão e condolências, mas o que vivenciamos não foi somente o assassinato de gente inocente por uma corja de desvairados agentes suicidas, as duas torres destruídas, e os aviões espatifados. Alguns valores, sonhos e ilusões também foram destruídos.
Nos todos estamos chocados pela evidência de que o mal não está somente em nossas categorias clássicas de doenças, nos ferimentos não intencionais, acidentes e delinqüência comum. Nos ficamos todos contaminados pela ira, pelo ódio, e sentimentos de vingança. Não houve uma arma química ou biológica, mas explodiu uma bomba muito mais potente, perigosa, penetrante e insidiosa. Nossa racionalidade foi dominada por maus sentimentos, e demônios afetivos, que temos dentro de nós, estão agora soltos.
Estamos todos chocados pela evidência de que a cadeia epidemiológica é mais intrincada e mais longa do que habitualmente a consideramos, não é somente um azar ou conseqüência de forças misteriosas, mas pode estar associada com o comportamento humano, e a maldade intrínseca. Nos todos estamos chocados pela evidência de que não somente no extremo da pobreza residem as ameaças para a vida e para a saúde, mas também do outro lado. Provavelmente as variáveis a serem consideradas, mais do que a simples magnitude isolada dos fenômenos, devam ser seus desequilíbrios e iniquidades. Estamos chocados pela evidência de que agora não somente a economia é global, mas também a política e outras coisas boas e más.
Muitos sintomas aos quais nós progressivamente fomos nos acostumando, como a deterioração das relações humanas, a perda de valores tradicionais, e artes como a da medicina, dominação e dependência, discriminação e intolerância, promoção da violência e do ódio a qualquer pretexto, cobiça desenfreada, agora explodiram.
Os frutos da força bruta e da violência são o sofrimento, mais ódio, destruição e morte. Nossa profissão está voltada essencialmente para a vida, e não podemos tolerar qualquer outra alternativa. Apesar de tudo, ainda existe uma saída: precisamos desesperadamente reforçar a amizade, o respeito, a compreensão, a tolerância, solidariedade, compaixão, e o mútuo apoio daqueles que tiverem ainda boa vontade.
#Eduardo Belardinelli Achutti
Nosso neto mais jovem, filho de nosso primeiro filho, Luiz Eduardo, e irmão da Júlia, também filhos da Maria Cristina Belardinelli, completou em Lily a primeira etapa de sua formação superior, iniciada em Roma. Vai defender tese em outubro próximo, e continuar sua pós-graduação em Turim.
Deu-me enorme prazer, chamando-me por WA-vídeo, para dar essas notícias, no início da semana #
Think you’re familiar with planet Earth? Wait until you explore it through the unique perspectives of Nautilus writers. Our latest eBook, “Earth,” contains five stories about the planet we call home, including the award-nominated essay “The Great Forgetting.” In it, author Summer Praetorius excavates the Earth’s past and her own, and the rocky relationships that shaped both. Download your free copy of “Earth” today and start exploring today.
Declaration Extends Animal Consciousness to Insects and Beyond
By DAN FALK
A group of prominent biologists and philosophers announced a new consensus: There’s “a realistic possibility” that insects, octopuses, crustaceans, fish and other overlooked animals experience consciousness.
Hopes of Big Bang Discoveries Ride on a Future Spacecraft
By ELISE CUTTS
New clues about fundamental physics could come from the Laser Interferometer Space Antenna (LISA), a spacecraft designed to detect gravitational waves that was recently approved by the European Space Agency.
Pleasure or Pain? He Maps the Neural Circuits That Decide.
By INGRID WICKELGREN
The work of the neuroscientist Ishmail Abdus-Saboor has opened up a world of insights into precisely how much pleasure and pain animals experience during different forms of touch.
Each week Quanta Magazine explains one of the most important ideas driving modern research. This week, senior math writer Jordana Cepelewicz describes how “toy” problems drive major breakthroughs.
Why Math Plays With Toys
By JORDANA CEPELEWICZ
Math is riddled with questions that seem silly or contrived, yet end up being surprisingly deep. Take a simple geometry question that dates back to 1917. Lay an infinitely thin needle on a table, then turn it so that it points in every possible direction. Depending on how you do this, you can sweep out all sorts of shapes: a circle, a triangle, the spiky contours of a sea urchin. What’s the area of the smallest shape you can make this way?
Mathematicians have proved that there’s no limit to how small it can be. Furthermore, they’ve formulated different versions of the problem, asking about the size of such shapes for notions of “size” other than area. These variations seem even more arbitrary than the original question — who cares?
As it turns out, such questions are intimately connected to some of the most central research programs in mathematics. Last year, I wrote several stories about how a variation of this problem underpins a tower of important conjectures about the behavior of functions, including one about the physics of waves. “Somehow, this geometry of lines pointing in many different directions is ubiquitous in a large portion of mathematics,” one mathematician told me.
Some “toy” problems stay just that — intriguing brainteasers that don’t become broadly relevant. But many others become laboratories of sorts: places for mathematicians to test out new ideas, explore novel connections and revisit math’s very foundations.
This sort of thing happens too often to be a coincidence. It illustrates the hidden complexity of simple problems and shows just how intertwined different fields of mathematics can be.
What’s New and Noteworthy
In a conversation with Quanta published in 2018, Tadashi Tokieda, a mathematician at Stanford University, spoke about how he plays with actual toys and everyday objects — strips of paper, balls in a bowl, rolls of quarters — to uncover mathematical insights. “If you come a little fresher, and a little more naïve, you can look all over the place … and find your own surprises,” he said.
Earlier this year, Kevin Hartnett wrote about a series of results in this vein, detailing mathematicians’ quest to discover the fattest possible Möbius strip and other “optimal” shapes. Richard Schwartz, one of the leaders of the project, spoke to Quanta a few years ago about what attracts him to such questions. By virtue of being so easy to state, toy problems often captivate mathematicians from different research areas and with varying levels of expertise — promoting novel approaches and diverse ways of thinking.
Moreover, “I feel if it’s a simple problem that hasn’t been solved, it probably has some kind of hidden depth to it,” Schwartz said.
The centuries-old “sphere packing” problem is a perfect example of this. How can you arrange spheres so that they fill as much space as possible? In 1611, Johannes Kepler conjectured that to get the optimal answer in 3D, you should stack spheres in a pyramid shape, akin to how oranges get piled in a grocery store. But it wasn’t until 1998 that a mathematician named Thomas Hales finally proved this.
In higher dimensions, the problem, though still straightforward, is even harder. In 2016, Quanta reported on a groundbreaking result that showed how to optimally pack eight- and 24-dimensional spheres into the densest possible configurations. Central to the work (for which Maryna Viazovska was awarded the Fields Medal in 2022) were complicated mathematical functions called modular forms.
Modular forms cropping up in this context came as a surprise to many mathematicians. But perhaps it no longer should: As I reported last year, these functions have also turned up in unexpected ways in number theory, combinatorics, topology, cryptography and even string theory. The sphere-packing problem, because it’s so simple and natural, has helped to cement just how fundamental this highly technical piece of mathematical technology can be.
AROUND THE WEB
The Oxford Mathematics channel on YouTube has a talk by Tokieda in which he uses a single sheet of paper to explore a wide variety of mathematical and scientific phenomena.
Science Friday interviewed Eugenia Cheng about how simple questions, like why 1 + 1 = 2, can make mathematicians question their assumptions.
Tim Gowers, a Fields medalist and celebrated mathematician, wrote a 2000 essay titled “The Two Cultures of Mathematics,” which explores different “types” of mathematicians and the kinds of questions they consider important.
Neural networks are at the core of artificial intelligence (AI), fueling a variety of applications from spotting objects in photos to translating languages. In this article, we’ll dive into what neural networks are, how they work, and why they’re a big deal in our technology-driven world today./.../
#Com Dra. Valderês A. Robinson Achutti(*13/06/1931+15/06/2021)
No jantar de encerramento do XI Congresso Mundial de Cardiologia, em Manila 1990.
Na foto de baixo estava conosco a saudosa Marianne Burle de Figueiredo, Secretária Executiva da Federação Mundial de Cardiologia, desde a época em que se chamava "International Society and Federation of Cardiology" Hoje, minha filha Lucia Helena, fazendo arrumação em guardados, encontrou as duas vestes que usamos na cerimônia. Foi a única vez que, além dos dados oficiais, passaporte, etc... solicitaram aos convidados, com meses de antecedência, as medidas corporais, para a confecção das vestes bordadas a mão... Na sessão de abertura, a Presidente Corazón Aquino esteve presente e, ao entrar no Salão de Atos, quando passou por nós (Valderês e eu), sentados na primeira fila da platéia, nos apertou as mãos como reperesentates dos demais congressistas. Vestíamos a tal jaqueta branca feita de um tecido, a partir de folha de bananeira, típico de lá
Corazon Aquino, in full Maria Corazon Aquino, née Maria Corazon Cojuangco, (born January 25, 1933, Tarlac province, Philippines —died August 1, 2009, Makati ), Philippine political leader who served as the first female president (1986–92) of the Philippines, three years after her husband's assassination, restoring democratic rule in that country after the long dictatorship of Ferdinand Marcos.
#Zero Hora
Meu filho Luiz Eduardo é coautor
Na segunda página do jornal do dia 09, Juliana Bublitz informa sobre a publicação de um livreto, da qual meu filho Luiz Eduardo é um dos co-autores
University of California, Irvine biomedical engineering researchers have uncovered a previously unknown source of two key brain waves crucial for deep sleep: slow waves and sleep spindles.
Traditionally believed to originate from one brain circuit linking the thalamus and cortex, the team’s findings, published today in Scientific Reports, suggest that the axons in memory centers of the hippocampus play a role.
For decades, slow waves and sleep spindles have been identified as essential elements of deep sleep, measured through electroencephalography recordings on the scalp. However, the UC Irvine-led team revealed a novel source of these brain waves within the hippocampus and were able to measure them in single axons./.../
By uncovering the hippocampus’s role in generating slow waves and sleep spindles, this research expands our understanding of the brain’s activity during deep sleep and its impact on memory processing. Credit: Neuroscience News#
Last July, I read this memo to the staff and explained why I had made the difficult decision to move on from my role as Quanta’s editor-in-chief. This magazine has meant everything to me since I pitched the concept to the Simons Foundation in 2012. Building, growing, nurturing and leading the publication and staff — and being a part of what we’ve collectively accomplished — has been the most remarkable and rewarding experience of my career. And it’s been especially gratifying to see valued Quanta readers like you multiply twentyfold over the past decade, with many millions more engaging with our science and math content on socialmedia and YouTube, and through our podcasts and in translated reprintings around the world...
New research has uncovered a social world of viruses full of cheating, cooperation and other intrigues, suggesting that viruses make sense only as members of a community.
Black holes are inescapable traps for most of what falls into them — but there can be exceptions. The theoretical physicist Leonard Susskind speaks with co-host Janna Levin about the black hole information paradox and how it has propelled modern physics.
Avi Wigderson, Complexity Theory Pioneer, Wins Turing Award
By STEPHEN ORNES
The prolific researcher found deep connections between randomness and computation and spent a career influencing cryptographers, complexity researchers and more.
Number of Distances Separating Points Has a New Bound
By LEILA SLOMAN
Mathematicians have struggled to prove Falconer’s conjecture, a simple but far-reaching hypothesis about the distances between points. They’re finally getting close.
Peça de teatro pelo Acadêmico Gilberto Schwartsmann. Na Sala Olga Reverbel do Multipalco do São Pedro. Estacionamento no local (Riachuelo com Caldas Junior).
#Quantum Day
Celebrating World Quantum Day with IOP Publishing
14th April 2024
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To celebrate World Quantum Day, we have put together a collection of some of the amazing work taking place in quantum science and technology. From ground-breaking research articles and focus issues to the multitude of books, we want to celebrate the research paving the way in quantum science.
#AAAS
At AAAS, we’re guided by our commitment to advance science, engineering, and innovation throughout the world for the benefit of all. Making the STEMM fields more inclusive of women is a crucial part of this work.
'Construindo um mundo global: migrantes através do Atlântico (1746 – 1753)' é o tema da Quinta Cultural desta semana, com Antero Ferreira (Casa de Sarmento - UMinho / CITCEM).11/04/2024 as 19h Pelo Facebook e Youtube https://www.youtube.com/watch?v=MLvkR9o526s#Nature Briefing
Hello Nature readers, Today we discover the first algae that can fix nitrogen, gaze upon the first direct image of a ‘Wigner crystal’ made only of electrons and consider evidence of a shared practice of human sacrifice across Stone Age Europe.
