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Crisis mapping projects usually allows large numbers of people, including the public and crisis responders, to contribute information either remotely or from the site of the crisis. One benefit of the crisis mapping method over others is that it can increase situational awareness, since the public can report information and improve data management.
Khan Academy is an American non-profit that produces online video lessons and exercises for various subjects and levels. Founded by Sal Khan in 2006, it has over 10,000 videos, 8.39 million YouTube subscribers, and offers free test preps and courses.
MOOC stands for massive open online course, an online course with unlimited participation and open access via the Web. Learn about the origins, features and variations of MOOCs, from connectivist to extended, and their impact on education.
Sal Khan is an American educator and the founder of Khan Academy, a free online non-profit educational platform with over 6,500 video lessons. He also founded Khan Lab School, a private in-person school in California, and schoolhouse.world, a network of micro-schools.
The metric of the model on the half-plane, { , >}, is: = + ()where s measures the length along a (possibly curved) line. The straight lines in the hyperbolic plane (geodesics for this metric tensor, i.e., curves which minimize the distance) are represented in this model by circular arcs perpendicular to the x-axis (half-circles whose centers are on the x-axis) and straight vertical rays ...
The Banach fixed-point theorem guarantees the existence and uniqueness of fixed points of certain self-maps of metric spaces. It is an important tool in mathematics, with applications to differential equations, inverse functions, and reinforcement learning.
Vi Hart is an American recreational mathemusician who creates mathematical videos on YouTube and researches virtual reality and computational geometry. They are gender agnostic and have won the 2018 JPBM Communications Award for their popularization of mathematics.
This lead Khan to start the Khan Academy Non-profit Organization in 2008 and quit his job to focus on education in 2009. To date, Khan Academy has produced over 20,000 videos [ 3 ] with over 1.7 billion views on YouTube.