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🔗 Mathematics

In mathematics and computing, Fibonacci coding is a universal code which encodes positive integers into binary code words. It is one example of representations of integers based on Fibonacci numbers. Each code word ends with "11" and contains no other instances of "11" before the end.

The Fibonacci code is closely related to the Zeckendorf representation, a positional numeral system that uses Zeckendorf's theorem and has the property that no number has a representation with consecutive 1s. The Fibonacci code word for a particular integer is exactly the integer's Zeckendorf representation with the order of its digits reversed and an additional "1" appended to the end.

🔗 Star Trek

Star Trek Continues is an American fan-made web series set in the Star Trek universe. Produced by the nonprofit charity Trek Continues, Inc. and Dracogen, and initially co-produced by Far from Home LLC and Farragut Films, the series consists of 11 episodes released between 2013 and 2017. The series is an unofficial direct continuation of Star Trek: The Original Series, and emulates its visual and storytelling features to achieve the same look and feel. Those who made the show have said in interviews that the intent was to finish the original five-year mission of the show, and this is borne out in the plot lines of the final two episodes.

The series was fan-created and all episodes were released to watch on YouTube. As with all such Star Trek fan productions, use of copyrighted and trademarked properties from the original series was allowed so long as the production was not commercial. A portion of the funds necessary to produce the episodes was raised through successful Kickstarter and Indiegogo campaigns, to which thousands of backers contributed.

Star Trek Continues won a Webby Award for "People's Choice – Long Form Drama" in 2016, a Geekie Award for "Best Web Series" in 2014, and numerous Telly and Accolade awards. The series was very positively received by critics, who praised the quality of the production and stated that the show set a new standard for Star Trek fan films.

After the 11th episode was released in late 2017, the Star Trek Continues series ended.

🔗 Spaceflight 🔗 Environment 🔗 Disaster management

The Kessler syndrome (also called the Kessler effect, collisional cascading, or ablation cascade), proposed by NASA scientist Donald J. Kessler in 1978, is a theoretical scenario in which the density of objects in low Earth orbit (LEO) due to space pollution is high enough that collisions between objects could cause a cascade in which each collision generates space debris that increases the likelihood of further collisions. One implication is that the distribution of debris in orbit could render space activities and the use of satellites in specific orbital ranges difficult for many generations.

🔗 Computing

A Gödel machine is a hypothetical self-improving computer program that solves problems in an optimal way. It uses a recursive self-improvement protocol in which it rewrites its own code when it can prove the new code provides a better strategy. The machine was invented by Jürgen Schmidhuber (first proposed in 2003), but is named after Kurt Gödel who inspired the mathematical theories.

The Gödel machine is often discussed when dealing with issues of meta-learning, also known as "learning to learn." Applications include automating human design decisions and transfer of knowledge between multiple related tasks, and may lead to design of more robust and general learning architectures. Though theoretically possible, no full implementation has been created.

The Gödel machine is often compared with Marcus Hutter's AIXItl, another formal specification for an artificial general intelligence. Schmidhuber points out that the Gödel machine could start out by implementing AIXItl as its initial sub-program, and self-modify after it finds proof that another algorithm for its search code will be better.

🔗 Canada 🔗 Minnesota 🔗 Canada/Geography of Canada 🔗 National Register of Historic Places

The northwesternmost point of the Lake of the Woods was a critical landmark for the boundary between U.S. territory and the British possessions to the north. This point was referred to in the Treaty of Paris in 1783 and in later treaties including the Treaty of 1818. This point lies at the corner of the Northwest Angle of Minnesota and is thus the northernmost point in the lower 48 United States. After Canadian Confederation, the point became the basis for the border between Manitoba and Ontario.

The "northwesternmost point" of the lake had not yet been identified when it was referenced in treaties defining the border between the US and Britain; it was simply an easily described abstraction based on a large landmark. The best maps at the time of the original negotiation depicted the lake as a simple oval. However, although the southern portion of the lake is easily mapped, to the north it becomes a complex tangle of bays, peninsulas, and islands, with many adjacent bodies of water separated or connected by narrow isthmuses or straits. An 1822 survey crew declared the referenced point impossible to determine. In 1824, British explorer David Thompson was hired to identify it. Thompson mapped the lake and found four possibilities, but did not conclusively declare one location.

In 1825, German astronomer in British service Dr. Johann Ludwig Tiarks surveyed the lake. Tiarks identified two possibilities for the northwesternmost point on the lake, based on Thompson's maps: the Angle Inlet and Rat Portage. To determine which point was the most northwestern, he drew a line from each point in the southwest-northeast direction. If the line intersected the lake at any point, it was not the most northwestern point, as shown in the example diagram here. Tiarks determined that the only such line that did not intersect the lake was at the edge of a pond on the Angle Inlet. (A 1940 academic study documents this point as being in the immediate vicinity of 49°23′51.324″N 95°9′12.20783″W (NAD83).)

Under the 1783 treaty, the international border would have run due west from this point to the Mississippi River. As this was determined to be geographically impossible (the Mississippi begins further south), under the 1818 treaty the international border instead ran from the point determined by Tiarks, to the 49th parallel. (It was not known at the time whether that was to the north or – in fact – the south.) From there it ran due west to the Rocky Mountains (and later, the Pacific coast).

Tiarks' point, however, created problems, because the 1818 treaty called for the border to run directly north–south from it. South of that point, the channel of the Northwest Angle Inlet meandered east and west, crossing the border five times, thereby creating two small enclaves of water areas totaling two and a half acres that belonged to the United States but were surrounded by Canadian waters. A 1925 treaty addressed this by adopting the southernmost of the points where the channel and the border intersected – approximately 5,000 ft (1,500 m) south of Tiarks' point – as the new "northwesternmost point". The new northwesternmost point thus became 49°23′4.14″N 95°9′11.34″W, based on the NAD27 datum, which is equivalent to 49°23′4.12373″N 95°9′12.20783″W under the modern NAD83 datum.

🔗 Computing 🔗 Computer science 🔗 Mathematics

The P versus NP problem is a major unsolved problem in computer science. It asks whether every problem whose solution can be quickly verified can also be solved quickly.

It is one of the seven Millennium Prize Problems selected by the Clay Mathematics Institute, each of which carries a US$1,000,000 prize for the first correct solution.

The informal term quickly, used above, means the existence of an algorithm solving the task that runs in polynomial time, such that the time to complete the task varies as a polynomial function on the size of the input to the algorithm (as opposed to, say, exponential time). The general class of questions for which some algorithm can provide an answer in polynomial time is called "class P" or just "P". For some questions, there is no known way to find an answer quickly, but if one is provided with information showing what the answer is, it is possible to verify the answer quickly. The class of questions for which an answer can be verified in polynomial time is called NP, which stands for "nondeterministic polynomial time".

An answer to the P = NP question would determine whether problems that can be verified in polynomial time can also be solved in polynomial time. If it turned out that P ≠ NP, which is widely believed, it would mean that there are problems in NP that are harder to compute than to verify: they could not be solved in polynomial time, but the answer could be verified in polynomial time.

Aside from being an important problem in computational theory, a proof either way would have profound implications for mathematics, cryptography, algorithm research, artificial intelligence, game theory, multimedia processing, philosophy, economics and many other fields.

🔗 Medicine 🔗 Medicine/Cardiology 🔗 Wales

The Caerphilly Heart Disease Study, also known as the Caerphilly Prospective Study (CaPS), is an epidemiological prospective cohort, set up in 1979 in a representative population sample drawn from Caerphilly, a typical small town in South Wales, UK.

The initial aim was to examine relationships between a wide range of social, lifestyle, dietary and other factors with incident vascular disease. Opportunity was also taken, in collaboration with a range of clinical and laboratory colleagues, to collect data on a wide range of factors with possible relevance to diseases other than vascular, and at the same time to collect clinical information on incident disease events. The study was initiated by Professor Peter Elwood, Director of the Medical Research Council (MRC) Epidemiology Unit for South Wales. The work has so far led to over 400 publications in the medical press.

🔗 Biography 🔗 Women writers 🔗 Biography/arts and entertainment 🔗 Journalism 🔗 Malta

Daphne Anne Caruana Galizia (née Vella; 26 August 1964 – 16 October 2017) was a Maltese writer, journalist, blogger and anti-corruption activist, who reported on political events in Malta. In particular, she focused on investigative journalism, reporting on government corruption, nepotism, patronage, allegations of money laundering, links between Malta's online gambling industry and organized crime, Malta's citizenship-by-investment scheme, and payments from the government of Azerbaijan. Caruana Galizia's national and international reputation was built on her regular reporting of misconduct by Maltese politicians and politically exposed persons.

Caruana Galizia continued to publish articles for decades, despite intimidation and threats, libel suits and other lawsuits. She was arrested by the Malta Police Force on two occasions. Caruana Galizia's investigations were published via her personal blog Running Commentary, which she set up in 2008. She was a regular columnist with The Sunday Times of Malta and later The Malta Independent. Her blog consisted of investigative reporting and commentary, some of which was regarded as personal attacks on individuals, leading to a series of legal battles. In 2016 and 2017, she revealed controversially sensitive information and allegations relating to a number of Maltese politicians and the Panama Papers scandal.

On 16 October 2017, Caruana Galizia was killed close to her home when a car bomb was detonated inside her vehicle, attracting widespread local and international condemnation of the attack. In December 2017, three men were arrested in connection with the car bomb attack. Police arrested Yorgen Fenech, the owner of the Dubai-based company 17 Black, on his yacht on 20 November 2019 in connection with her murder.

In April 2018, an international consortium of 45 journalists published The Daphne Project, a collaboration to complete her investigative work. The GUE/NGL Award for Journalists, Whistleblowers & Defenders of the Right to Information was established in 2018 in honour of Galizia.

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