Teach Astronomy - Clustered Distribution
http://www.teachastronomy.com/ Sometimes stars appear to be close to each other on the plane of the sky, but how do we know if these stars are physically close to each other in three dimensional space? For an individual pair of stars, without additional information, we don't know, but for
From playlist 17. Galactic Mass Distribtuion and Galaxy Structure
Hierarchical Clustering 3: single-link vs. complete-link
[http://bit.ly/s-link] Agglomerative clustering needs a mechanism for measuring the distance between two clusters, and we have many different ways of measuring such a distance. We explain the similarities and differences between single-link, complete-link, average-link, centroid method and
From playlist Hierarchical Clustering
Teach Astronomy - Galaxy Clusters
http://www.teachastronomy.com/ Galaxy clusters contain anywhere from hundreds to thousands of galaxies, and there is no fixed demarcation between what is considered a galaxy group and a cluster. In the early 1960s astronomer George Abell cataloged twenty-seven hundred clusters in the nort
From playlist 20. Galaxy Interaction and Motion
Clustering (2): Hierarchical Agglomerative Clustering
Hierarchical agglomerative clustering, or linkage clustering. Procedure, complexity analysis, and cluster dissimilarity measures including single linkage, complete linkage, and others.
From playlist cs273a
Clustering 1: monothetic vs. polythetic
Full lecture: http://bit.ly/K-means The aim of clustering is to partition a population into sub-groups (clusters). Clusters can be monothetic (where all cluster members share some common property) or polythetic (where all cluster members are similar to each other in some sense).
From playlist K-means Clustering
Machine Learning on Gun Protests Diffusion: Cluster-Tree-MLE Analysis in Space-Time Metric Space
To learn more about Wolfram Technology Conference, please visit: https://www.wolfram.com/events/technology-conference/ Speaker: Lanston Chu Wolfram developers and colleagues discussed the latest in innovative technologies for cloud computing, interactive deployment, mobile devices, and m
From playlist Wolfram Technology Conference 2018
Hierarchical Clustering 5: summary
[http://bit.ly/s-link] Summary of the lecture.
From playlist Hierarchical Clustering
49 Sinkholes Found in China Cluster | National Geographic
Newly discovered cluster of natural sinkholes in China contain primitive forests and giant flying squirrels. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their
From playlist News | National Geographic
Computational Behavioural Science: The Hidden Message behind Emojis
Emojis are a popular form of non-linguistic expression in computer-mediated communication (CMC). Various factors such as platform diversity, age, gender, etc. have been known to affect emoji usage patterns. Further, studying emoji usage patterns could possibly provide insight into human be
From playlist Wolfram Technology Conference 2020
DEFCON 16: Evade IDS/IPS Systems using Geospatial Threat Detection
Speaker: Ryan Trost, Director of Security, Comprehensive Health Services IDS/IPS systems are becoming more and more advanced and geocoding is adding another layer of intelligence to try and defend against a company's vulnerabilities. Learn how to evade complex geospatial threat detection
From playlist DEFCON 16
Moran's I : Data Science Concepts
How do we measure spatial correlation?
From playlist Data Science Concepts
Finding more needles by building bigger haystacks - Dr Jacob Eisenstein
Bridging disciplines in analysing text as social and cultural data workshop (21-22 September, 2017) The potential benefits of using large-scale text data to study social and cultural phenomena is increasingly being recognized, but researchers are currently scattered across a range of ofte
From playlist Bridging disciplines in analysing text as social and cultural data
Mapping the Future of Global Civilization | Nat Geo Live
Join Parag Khanna, a leading global strategist and best-selling author, for a journey through the emerging global network civilization in which megacities compete over connectivity instead of borders. Discover how 21st-century conflict is a tug-of-war over pipelines, Internet cables, advan
From playlist National Geographic Live!: Season 11
Twitch Talks - Astronomy & Space Entities
Presenter: Jeff Bryant Wolfram Research developers demonstrate the new features of Version 12 of the Wolfram Language that they were responsible for creating. Previously broadcast live on July 9, 2019 at twitch.tv/wolfram. For more information, visit: https://www.wolfram.com/language/12/a
From playlist Twitch Talks
Spatio-Temporal Dynamics of Interacting Species across a Fragmented....by Saskya van Nouhuys
PROGRAM FIFTH BANGALORE SCHOOL ON POPULATION GENETICS AND EVOLUTION (ONLINE) ORGANIZERS: Deepa Agashe (NCBS, India) and Kavita Jain (JNCASR, India) DATE: 17 January 2022 to 28 January 2022 VENUE: Online No living organism escapes evolutionary change, and evolutionary biology thus conn
From playlist Fifth Bangalore School on Population Genetics and Evolution (ONLINE) 2022
Hierarchical Clustering 4: the Lance-Williams algorithm
[http://bit.ly/s-link] The Lance-Williams algorithm provides a single, efficient algorithm to implement agglomerative clustering for different linkage types. We go over the algorithm and provide the update equations for single-link, complete-link and average-link definitions of inter-clust
From playlist Hierarchical Clustering
Spatial point data, also known as spatial point patterns, refers to collections of points (or events) in space. Examples include trees in a forest, gold deposits, positions of stars, earthquakes, crime locations, animal sightings, etc. Spatial data analysis, as a statistical exploration of
From playlist Wolfram Technology Conference 2020