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Universe Expansion May Be Slowing, Not Accelerating, Study Suggests

Slashdot
2 months 2 weeks ago
A new study challenges the Nobel-winning theory that the universe's expansion is accelerating, suggesting instead that it may be slowing down as dark energy weakens -- potentially leading to a future "big crunch" where the cosmos collapses back in on itself. "Our study shows that the universe has already entered a phase of decelerated expansion at the present epoch and that dark energy evolves with time much more rapidly than previously thought," said Prof Young-Wook Lee, of Yonsei University in South Korea, who led the work. "If these results are confirmed, it would mark a major paradigm shift in cosmology since the discovery of dark energy 27 years ago." The Guardian reports: The latest work focuses on the reliability of observations of distant supernovae (exploding stars) that led to the discovery of dark energy, work that was awarded the 2011 Nobel prize in physics. [...] By estimating the ages of 300 host galaxies using a different method, the team concluded that there are simply variations in the properties of stars in the early universe that mean they produce, on average, fainter supernovae. Correcting for this systematic bias still results in an expanding universe, but suggests that the expansion has slowed down and that dark energy is waning, the analysis concluded. If dark energy keeps decreasing to the point where it becomes negative, the universe is theoretically predicted to end in a big crunch. The findings are published in Monthly Notices of the Royal Astronomical Society.

Read more of this story at Slashdot.

BeauHD

Secure to Great Lengths

The Daily WTF
2 months 2 weeks ago

Our submitter, Gearhead, was embarking on STEM-related research. This required him to pursue funding from a governmental agency that we’ll call the Ministry of Silly Walks. In order to start a grant application and track its status, Gearhead had to create an account on the Ministry website.

The registration page asked for a lot of personal information first. Then Gearhead had to create his own username and password. He used his password generator to create a random string: D\h.|wAi=&:;^t9ZyoO

Upon clicking Save, he received an error.

Your password must be a minimum eight characters long, with no spaces. It must include at least three of the following character types: uppercase letter, lowercase letter, number, special character (e.g., !, $, % , ?).

Perplexed, Gearhead emailed the Ministry’s web support, asking why his registration failed. The reply:

Hello,
The site rejects password generators as hacking attempts. You will need to manually select a password.
Ex. GHott*01

Thank you,

Support

So a long sequence of random characters was an active threat, but a 1990s-era AOL username was just fine. What developer had this insane idea and convinced other people of it? How on earth did they determine what was a "manually selected" string versus a randomly-generated one?

It seems the deciding factor is nothing more than length. If you go to the Ministry’s registration page now, their password guidelines have changed (emphasis theirs):

Must be 8-10 characters long, must contain at least one special character ( ! @ # $ % ^ & * ( ) + = { } | < > \ _ - [ ] / ? ) and no spaces, may contain numbers (0-9), lower and upper case letters (a-z, A-Z). Please note that your password is case sensitive.

Only good can come of forcing tiny passwords.

The more a company or government needs secure practices, the less good they are at secure practices. Is that a law yet? It should be.

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Ellis Morning