Phased antenna arrays allow a radio or microwave beam to be steered electronically. They are of increasing practical importance. Phased array optimisation problems are non-convex with multiple local maxima and...continue reading.
[click and zoom] The diagram shows the evolutionary tree of 726 extant waterbird species. This group of birds belong to a clade called Aequorlitornithes whose most recent common ancestor (MRCA)...continue reading.
Statistical physics and Bayesian inference are closely related (see Andrew Gelman’s remarks here for example). A good way to illustrate the relationship is to simulate a statistical physics model using the...continue reading.
Salekhard (66.53 °N, 66.67 °E) is located in Yamalia at the Northern end of the Ural mountain range. 95% of the daily average temperatures observed at Salekhard weather station since 1882 fall within…continue reading.
The map shows tracks of drifting buoys deployed in the southern ocean between 2005 and 2016. The underlying dataset consists of 15-minute gps data collected from 4608 buoys, available from NOAA…continue reading.
I recently came across Peirce’s Quincuncial map projection, invented by the philosopher C. S. Peirce in 1879. Pierce projected each hemisphere of a spherical earth on to a square in such…continue reading.
GIS / R / R News / Shiny / Visualization
Interactive visualization of geospatial data with R Shiny
April 17, 2021
