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Saturday, April 29, 2023

3.134 - AMICOR (25)

 3.134 - AMICOR (25)

#Dra. Valderês Antonietta Robinson Achutti (*13/06/1931+15/06/2021)


1992

#Slideshow: 105 fotos de abertura Clicar em apresentação de slides

#Nature

What Rosalind Franklin truly contributed to the discovery of DNA’s structure

#WHO
Recomendado pela AMICOR Maria Inês Reinert Azambuja
1 in 6 people globally affected by infertility: WHO
4 April 2023 
News release
 
Geneva, Switzerland
 
Reading time: 2 min (617 words)

Large numbers of people are affected by infertility in their lifetime, according to a new report published today by WHO. Around 17.5% of the adult population – roughly 1 in 6 worldwide – experience infertility, showing the urgent need to increase access to affordable, high-quality fertility care for those in need.

The new estimates show limited variation in the prevalence of infertility between regions. The rates are comparable for high-, middle- and low-income countries, indicating that this is a major health challenge globally. Lifetime prevalence was 17.8% in high-income countries and 16.5% in low- and middle-income countries.

“The report reveals an important truth: infertility does not discriminate,” said Dr Tedros Adhanom Ghebreyesus, Director-General at WHO. “The sheer proportion of people affected show the need to widen access to fertility care and ensure this issue is no longer sidelined in health research and policy, so that safe, effective, and affordable ways to attain parenthood are available for those who seek it.”

Infertility is a disease of the male or female reproductive system, defined by the failure to achieve a pregnancy after 12 months or more of regular unprotected sexual intercourse. It can cause significant distress, stigma, and financial hardship, affecting people’s mental and psychosocial well-being./.../


#MEDSCAPE
MedscapeMedscape



24, 2023
Secadores de esmalte com luz ultravioleta podem aumentar risco de câncer de pele
Novo estudo sugerem que a radiação dos secadores de esmalte com luz UV pode induzir a morte celular e desencadear, em células humanas, alterações moleculares relacionadas ao câncer.
Saiba mais ›


#LiveScience

World's heaviest Schrödinger's cat made in quantum crystal visible to the naked eye

An artist's illustration of three Schrödinger's cats.
An artist's illustration of three Schrödinger's cats. (Image credit: Yiwen Chu/ETH Zurich)

Physicists have created the world's heaviest Schrödinger's cat, bringing the bizarre behavior of the quantum world to larger scales than ever before.

The trick, performed by vibrating 100 million billion atoms inside a sand-grain-sized sapphire crystal, created the world's heaviest quantum superposition as the crystal simultaneously oscillated in two different directions. Despite weighing just 16 micrograms (16 millionths of a gram), the crystal is trillions of times heftier than the molecules put into previous large-scale quantum states, and is visible to the naked eye. 

Taking its name from Erwin Schrödinger's famous thought experiment, the new Schrödinger's cat crystal could be used to design more robust quantum computers and reveal clues behind why quantum effects are not seen in the real world, according to the researchers. Their findings were published April 20 in the journal Science(opens in new tab)

#

My Bookmarks

BIODIVERSITY | ALL TOPICS

 

How Pools of Genetic Diversity Affect a Species’ Fate

By ANNA FUNK

A new, deeper understanding of how the breeding structure of species affects their genetic diversity is giving conservationists better tools for saving animals.

Read the article

Q&A

 

The Computer Scientist Peering Inside AI’s Black Boxes

By ALLISON PARSHALL

In school, we’re often asked to solve problems and to show our work. Cynthia Rudin teaches neural networks to explain their reasoning.

Read the interview


Related: 
The Researcher Who Would
Teach Machines to Be Fair

By Sheon Han

NUMBER THEORY

 

Why Mathematicians Re-Prove What They Already Know

By ANNA KRAMER

It’s been known for thousands of years that the primes go on forever, but new proofs give fresh insights into how theorems depend on one another.

Read the blog


Related: 
Mathematicians Will Never Stop
Proving the Prime Number Theorem

By Susan D'Agostino (2020)

SOLAR PHYSICS

 

Tiny Jets on the Sun Power the Colossal Solar Wind

By THEO NICITOPOULOS

A new analysis argues that ubiquitous eruptions in the sun’s corona explain the vast flow of charged particles seen streaming out through the solar system.


Read the blog

QUANTA SCIENCE PODCAST

 

Scientists Rethink the Causes of Alzheimer’s (Part 1)

Podcast hosted by SUSAN VALOT;
Story by YASEMIN SAPLAKOGLU

After decades in the shadow of the reigning model for Alzheimer’s disease, alternative explanations are finally getting the attention they deserve.

Listen to the podcast

Read the article

Around the Web

Schrödinger’s Sapphire
Researchers have put a piece of sapphire about half as massive as an eyelash into a quantum “Schrödinger’s cat” state. It’s more than 100 trillion times as massive as any test object in previous experiments, reports Emily Conover for Science News. Physicists want to push at the boundaries of the quantum regime to understand the transition between the microscopic world of quantum mechanics and the macroscopic world of everyday experience. Phil Ball wrote about their efforts for Quanta in 2021.


Free-Floating
New research reveals that fish and mammals navigate the world in different ways, reports Kate Golembiewski for The New York Times. Monitored brain activity in goldfish showed that they only keep track of their proximity to boundaries. The navigational systems of humans and other mammals, on the other hand, take on the more sophisticated and comprehensive challenge of building a mental map of their 3D environment. In 2021, Jordana Cepelewicz wrote for Quanta about a new study that showed how rats do it.
#Medium



#Nature Books
Sensational

Ashley Ward Profile (2023)

Aristotle is credited with the ‘discovery’, in the fourth century bc, that humans have five senses: vision, hearing, taste, smell and touch. But animal behaviourist Ashley Ward says the true number might be more than 50, including “a host of underappreciated but crucial senses”, such as those of balance and of time. To explore the science behind them, and how they work together to create our perception as a whole, he engagingly interweaves diverse evidence from biology, psychology, ecology, medicine, economics and even engineering.


Design for a Better World

Don Norman MIT Press (2023)

Don Norman has worked in electrical engineering, cognitive psychology, computer science and design, in academia and industry. Now in his eighties, he draws on this experience to explain how designers, governments and industry must “broaden the notion of design from human centred to humanity centred”. In other words, they must emphasize quality of life, not monetary rewards, and reject harmful economic metrics. Only thus, he argues, will we survive the current environmental and economic crises.

doi: https://doi.org/10.1038/d41586-023-01466-3





#Medium
how-do-you-cope-with-cosmic-anxiety

Who Invented the Measurement of Time?
 

HISTORY

Who Invented the Measurement of Time?

The first timekeeping devices were probably natural materials lost to the ages, but the ancient Egyptians were the first to leave records of their timekeeping methods

By Stephanie Pappas


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