Dennis Fisher recently spoke with journalist Joseph Menn, author of a new book called Cult of the Dead Cow: How the Original Hacking Supergroup Might Just Save the World, about the group’s far-reaching influence on hacking culture, the tech industry, and the emergence of hacktivism. Joseph Menn: Well, so one thing that was useful to me was the sort of chronological development, and actually this reminds me of my first solo book, which was about Napster. Dennis Fisher: There’s some folks that I think a lot of people in the industry knew were members of cDc but had never really acknowledged it publicly, that you reveal in the book, with their permission, one of whom is currently running for president, Beto O’Rourke.

This math puzzle from the YouTuber Numberphile poses a simple question: How can a mouse escape from a cat. If I take the cross product of the vector position of the cat and the position of the mouse, I will get a result in the z-direction (the pool is in the x-y plane). The dash tactic says that there are certain cases where the mouse is close enough to the edge of the pool that it will get there before the cat.

Yesterday, a disruption in Google’s network in parts of the United States caused slow performance and elevated error rates on several Google services, including Google Cloud Platform, YouTube, Gmail, Google Drive and others. However, for users who rely on services homed in the affected regions, the impact was substantial, particularly for services like YouTube or Google Cloud Storage which use large amounts of network bandwidth to operate. Next Steps

With all services restored to normal operation, Google’s engineering teams are now conducting a thorough post-mortem to ensure we understand all the contributing factors to both the network capacity loss and the slow restoration.

We are proud of our progressive cooperative relationship with TU Delft, which ties in well with KLM’s strategy and serves as an important milestone for us on the road to scaling-up sustainable aviation.” Radically new and highly energy-efficient aircraft designs such as the Flying-V are important in this respect, as are new forms of propulsion. Improved passenger experience

The Flying-V also provides researchers a unique opportunity to improve passenger experience in aircraft, from the seating layout in the wings, to the design of the seats and bathrooms.

Because grocery stores have low margins and are more at risk of shutting down in low-income areas, Rosas says, pharmacies drawing customers from other stores could contribute to even fewer options in the future. “CVS and other pharmacies make money selling highly processed, long shelf-life foods, because it is all convenient.” To get retailers to stock healthy food options – in areas where shoppers rely on pharmacies or in those where grocery stores rule – effective policies at both national and local levels could focus more on increasing health awareness.

You don’t only avoid holes in your teeth by keeping good oral hygiene, Norwegian researchers have discovered a clear connection between gum disease and Alzheimer’s disease

The researchers have determined that gum disease (gingivitis) plays a decisive role in whether a person developes Alzheimer´s or not. The bacteria produces a protein that destroys nerve cells in the brain, which in turn leads to loss of memory and ultimately, Alzheimer´s.

Mydel points out that the bacteria is not causing Alzheimer´s alone, but the presence of these bacteria raise the risk for developing the disease substantially and are also implicated in a more rapid progression of the disease. Mydel and his colleagues examined 53 persons with Alzheimer´s and discovered the enzyme in 96 per cent of the cases.According to Mydel, this knowledge gives researchers a possible new approach for attacking Alzheimer´s disease.

The International Astronomical Union, a key ruling body when it comes to the night sky, has released a statement echoing those concerns and calling for regulation of these sorts of satellite constellations. SpaceX CEO Elon Musk tweeted shortly after the launch, “We’ll make sure Starlink has no material effect on discoveries in astronomy,” but it is unclear how that will be possible with thousands of satellites hurtling through the sky all the time. The IAU statement urges satellite designers and policymakers to take a closer look at the potential impacts of satellite constellations on astronomy and how to mitigate them.

In the medieval period, Arabic book culture positively dwarfed that of Western Europe; the twelfth-century scholar Bernard of Chartres was proud of the twenty-four books he owned, but, in 1258, the city of Baghdad boasted thirty-six public libraries and over a hundred book merchants. It is difficult to assess private collections, but the thriving community of scholars in the city during the last century of Arab rule (985–1085) would have doubtless owned copies of the most important texts. It would not be unreasonable to suggest that The Elements and The Almagest might well also have been on ibn Baghunish’s shelves, and that at least some of his books—or cop­ies of them—could have still been in the city in the mid-twelfth cen­tury when Gerard was on the lookout for texts to translate.

Both of these concurrency models leverage message passing, but whereas actors pass messages between containers of state, the CSP model passes messages between channels, a form of synchronization and communication between coroutines or coroutine-like processes. You may not want to use CSP if:

The most popular example of CSP in a programming language at the moment is , whose concurrency model is designed around a derivative of Hoare’s CSP process calculus and implements channels as first-class citizens. However, a number of small academic projects have provided a base layer from which a CSP framework could arise:

Unlike other concurrency models, which suffer from a lack of Pythonic foundations, implementing a CSP process calculus could be done pythonically through the use of Python’s native and various coroutines and coroutine libraries.

Katie Yarborough was the first of the Therac-25 machines were in enormous demand in hospitals throughout North America, and AECL Medical’s equipment was widely considered the best in a growing field. After the accident, AECL notified Therac-25 operators, the federal government’s Canadian Radiation Protection Bureau, and the American Food and Drug Administration (FDA), which monitors medical equipment in the U.S., that there had been a problem with the Hamilton machine. Three months later, in December, 1985, a Therac-25 at Yakima Valley Memorial Hospital in Washington State, which had been modified according to AECL’s July specifications, delivered a similar dose, in a way similar to the Hamilton accident, to the hip of another cervical-cancer patient.