The Secret World of Gold (Full Documentary) Égypt et Pyramides. 1929 - 1l2 - La crise. General U.S.A. History. Updated April 2009 JUMP TO......Specific Time Periods & U.S. Wars / AP U.S. History - National History Day - Interactive History Quizzes General & Comprehensive sites & Biographies / Primary Documents - Images - First Person Accounts Statistics on the USA / Timelines & Important Dates / Maps The U.S. & State Flags Plus Other American Symbols / The Statue of Liberty The National Anthem & Music, Architecture, Art, & Literature in America Money & Labor / Minorities in the USA The National Park Service, Historic Landmarks, & Conservation - Library of Congress/National Archives - Smithsonian Institution Various Misc.
Boundaries of the Contiguous United States How the U.S. has changed over time: Animated Map Animated Atlas: Growth of a Nation Map Showing Geographical Center of the United States: 'Marvels of the New West' For more info on specific time periods and subjects, click on: For more info on specific time periods and subjects, click on: The 50 States TEXAS - my home state! AP U.S. World Trade Center From Helicopter.
Timeline.jpg (11819×4900) Editions du Cosmogone. Archéologie. 193377752. World History : HyperHistory. 10th millennium BC. The 10th millennium BC marks the beginning of the Mesolithic and Epipaleolithic period, which is the first part of the Holocene epoch. Agriculture, based on the cultivation of primitive forms of millet and rice, occurred in Southwest Asia.[1]Although agriculture was being developed in the Fertile Crescent, it would not be widely practised for another 2,000 years. [citation needed] Events[edit] c. 10,000 BC; First cave drawings of the Mesolithic period are made, with war scenes and religious scenes, *beginnings of what became story telling, and metamorphosed into acting. Old World[edit] Americas[edit] North America[edit] Australasia[edit] Australia[edit] Environmental changes[edit] c. 10,000 BC: c. 9700 BC: Lake Agassiz forms c. 9700 BC: Younger Dryas cold period ends.
In popular culture[edit] Chronological studies[edit] [edit] Jump up ^ Roberts (1994)Jump up ^ "Historical Estimates of World Population". References[edit] Storing Hierarchical Data in a Database. Automating the Tree Traversal Now that you’ve seen some of the handy things you can do with this table, it’s time to learn how we can automate the creation of this table. While it’s a nice exercise the first time and with a small tree, we really need a script that does all this counting and tree walking for us.
Let’s write a script that converts an adjacency list to a modified preorder tree traversal table. This is a recursive function. If there are no children, it sets its left and right values. The recursion makes this a fairly complex function to understand. Adding a Node How do we add a node to the tree? The first option is simple. The second way to add, and delete nodes is to update the left and right values of all nodes to the right of the new node. We’ll use the query: UPDATE tree SET rgt=rgt+2 WHERE rgt>5; UPDATE tree SET lft=lft+2 WHERE lft>5; Now we can add a new node ‘Strawberry’ to fill the new space. INSERT INTO tree SET lft=6, rgt=7, title='Strawberry'; Disadvantages.