Computational problems in graph theory | PSPACE-complete problems | Travelling salesman problem
In computer science and graph theory, the Canadian traveller problem (CTP) is a generalization of the shortest path problem to graphs that are partially observable. In other words, the graph is revealed while it is being explored, and explorative edges are charged even if they do not contribute to the final path. This optimization problem was introduced by Christos Papadimitriou and Mihalis Yannakakis in 1989 and a number of variants of the problem have been studied since. The name supposedly originates from conversations of the authors who learned of a difficulty Canadian drivers had: traveling a network of cities with snowfall randomly blocking roads. The stochastic version, where each edge is associated with a probability of independently being in the graph, has been given considerable attention in operations research under the name "the Stochastic Shortest Path Problem with Recourse" (SSPPR). (Wikipedia).
What Is the 'Gray Zone' Border Between the U.S. and Canada? | National Geographic
When the U.S. Border Patrol stopped fishing boats along the border between the U.S. and Canada, it reheated centuries-old tensions between the two countries in the Gulf of Maine. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premi
From playlist News | National Geographic
Toronto 4K - Night Drive - Driving Downtown - Canada
Friday night drive around downtown Toronto. Video highlights include the downtown city center, Chinatown, Yonge-Dundas Square, the entertainment district, and more. Enjoy! Toronto is an international centre of business, finance, arts, and culture, and is recognized as one of the most m
From playlist Location by Continent - North America - J Utah
Toronto to Montreal by train with VIA Rail Canada
A journey from Toronto Union Station to Montreal Gare Centrale in Business Class on board VIA Rail Canada train 62. Toronto to Montreal takes just 4h58 by train, for information see https://www.seat61.com/Canada.htm
From playlist Train Travel Worldwide
Polar Bear Encounter in Canada's High Arctic | National Geographic
Off the coast of Canada's Baffin Island, polar bears cavort and prowl the ice in search of food. Ice floes are a natural habitat for polar bears, but as the ice melts due to a warming climate, the species faces an uncertain future. Naturalists aboard the National Geographic Explorer share
From playlist Greatest Expedition Moments | National Geographic
The Hidden Gems of Manitoba Are Just a Road Trip Away | National Geographic
Road trip to see some of Manitoba, Canada’s hidden gems. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists,
From playlist News | National Geographic
What's the difference between travel, journey, trip and voyage?
Are you confused about when to use the words travel, journey trip and voyage? In this video you'll find out with examples of usage. For more English language learning videos subscribe to LetThemTalkTV http://www.youtube.com/user/letthemtalkparis?sub_confirmation=1 Find out more about
From playlist The most common mistakes of English grammar and vocabulary
Toronto 4K - Skyline Expressway - Driving Downtown
Saturday afternoon drive along the Gardiner Expressway. I've gotten a number of requests for this so here you go! What do you want to see? I always take note of locations you all request. Enjoy! Toronto is an international centre of business, finance, arts, and culture, and is recogni
From playlist Location by Continent - North America - J Utah
Driving Downtown - Montreal 4K - Canada
Driving Downtown - Montreal Quebec Canada - Episode 52. Starting Point: Rue Saint-Catherine https://goo.gl/maps/y8XTHksECEN2 . Montreal is the most populous municipality in the Canadian province of Quebec and the second-most populous municipality in Canada as a whole. Originally called Vil
From playlist Location by Continent - North America - J Utah
Why changing lanes doesn’t get you to your destination faster
We all have changed lanes when in a rush and running late, hoping it will get us to our destination faster. Unfortunately, this is the wrong move. Find out more information at https://bit.ly/3o5mbqH To get the latest science and technology news, subscribe to our newsletter "The Bluepr
From playlist All About Transportation
America's Failed High Speed Tilting Train - The UAC Turbotrain
Claim your SPECIAL OFFER for MagellanTV here: https://try.magellantv.com/curiousdroid. Start your free trial TODAY so you can watch Trains -2 Centuries of Innovation about France's world leading railways and the technology they developed to create them, and the rest of MagellanTV’s science
From playlist Planes, Trains and Automobiles
The Train Engines That Revolutionized The World | Power: Railways | Spark
Artists, writers, poets seem to have found the greatest fascination and the greatest romance in the powerful engines they have watched cross bridges climb mountains, and drive though the heart of cities. The romance of trains. The story of rail travel, is the story of huge loads, extravaga
From playlist The Science Of Trains
Canada’s Involvement In The Korean War (War History Documentary) | Real Stories
Strange Battleground; Norm follows the battles of the 25th Canadian Infantry Brigade in May 1951, to Chail-Li, the advance to the Jamestown Line; the Peace Talks at Pamunjom, and the Chinese offensive against the Canadians at The Sangok Position, and the tremendous defence of the Saddle at
From playlist War & History Documentaries
Canada's Healthcare System Explained!
Last week we discussed the United States health care system. This week we discuss Canada's. We also take some time to bust some myths about their single payer health care system. Fight about it in the comments below. Make sure you subscribe above so you don't miss any upcoming episodes!
From playlist Healthcare Triage
EEVblog 1498 - TransPod Fluxjet Hyperloop $550M Boondoggle!
The Transpod FluxJet is Hyperloop based on the "New physics" of "Veillance Flux"! And plasma arc power transfer! $550M to create a reduced pressure Fluxjet link from Calgary to Edmonton in Canada. It'll only cost $18B, what a bargain! And Sydney to Brisbane? Err, yeah, ok, let's look at th
From playlist Debunking
DEFCON 14: How to Create an Anonymous Identity
Speaker: Johan Hybinette Abstract: An Anonymous identity is difficult but not impossible to obtain. With help of international laws and loopholes a new identity can be created. This talk will demonstrate how this can be done with never before published methods. There are many reasons wh
From playlist DEFCON 14
In this episode: - The year in which the allies made steady progress against the Nazis- In Russia, the bloody siege of Stalingrad comes to an end with the surrender of German forces- In Northern Africa the forces unleashed by the Allies sees success- The Allies take 110,000 prisoners of wa
From playlist History documentaries | Members Only
Tales of Adventure - Still Untitled: The Adam Savage Project - 8/18/2015
Adam shares tales of his travels to Abu Dhabi, while Will and Norm update on their recent vacations.
From playlist The Adam Savage Project
The RCMP and the Mad Trapper of the Rat River
The day after Christmas in 1931, a constable with the Royal Canadian Mounted Police went to check on a man named Albert Johnson on suspicion that he was trapping without a license. The confrontation that followed would leave a fiery standoff, an epic manhunt, and an enduring mystery. The
From playlist True Crime
Chris Hadfield: How looking at 4 billion years of Earth’s history changes you | Big Think
Chris Hadfield: How looking at 4 billion years of Earth’s history changes you New videos DAILY: https://bigth.ink Join Big Think Edge for exclusive video lessons from top thinkers and doers: https://bigth.ink/Edge ----------------------------------------------------------------------------
From playlist Best Videos | Big Think
New York to Toronto by train on Amtrak & VIA Rail's "Maple Leaf", showing coach class & business class, the cafe car, and scenery along the Hudson & Mohawk rivers and across the Niagara into Canada. For schedule, fares, tickets see https://www.seat61.com/Canada.htm#Trains-from-the-USA-to-
From playlist Train Travel Worldwide