In geometry, the rectified 600-cell or rectified hexacosichoron is a convex uniform 4-polytope composed of 600 regular octahedra and 120 icosahedra cells. Each edge has two octahedra and one icosahedron. Each vertex has five octahedra and two icosahedra. In total it has 3600 triangle faces, 3600 edges, and 720 vertices. Containing the cell realms of both the regular 120-cell and the regular 600-cell, it can be considered analogous to the polyhedron icosidodecahedron, which is a rectified icosahedron and rectified dodecahedron. The vertex figure of the rectified 600-cell is a uniform pentagonal prism. (Wikipedia).
This shows a 3d print of a mathematical sculpture I produced using shapeways.com. This model is available at http://shpws.me/3NgS
From playlist 3D printing
This shows a 3d print of a mathematical sculpture I produced using shapeways.com. This model is available at http://shpws.me/2Uh3
From playlist 3D printing
Physics - E&M: Dis- and Re-Connecting Capacitors (16 of 16) 3-Cap., Same, 3-Charged, Series, + to -
Visit http://ilectureonline.com for more math and science lectures! In this video I will find q1=?, q2-?, q3=? of 3 capacitors C1=2uF, C2=2uF, C3=2uF in series, where Q1=40uC, Q2=100uC, Q3=60uC, + to -. First video in this series can be seen: https://youtu.be/F1RQSvvT17k
From playlist PHYSICS 39.1 CAPACITORS RECONNECTED
Physics - E&M: Dis- and Re-Connecting Capacitors (2 of 16) 1-Charged, 1-Uncharged, Different Size
Visit http://ilectureonline.com for more math and science lectures! In this video I will find q1=?, q2=? of 2 capacitors C1=2uF, C2=4uF in parallel, where Q1=40uC, Q2=0 and + to +. Next video in this series can be seen: https://youtu.be/rwFL08Ghm1g
From playlist PHYSICS 39.1 CAPACITORS RECONNECTED
Physics - E&M: Dis- and Re-Connecting Capacitors (8 of 16) 3-Cap., Different Size, 1-Charged, Series
Visit http://ilectureonline.com for more math and science lectures! In this video I will find q1=?, q2-?, q3=? of 3 capacitors C1=2uF, C2=3uF, C3=4uF in series, where Q1=40uC, Q2=0, Q3=0. Next video in this series can be seen: https://youtu.be/He6fkw2EQGc
From playlist PHYSICS 39.1 CAPACITORS RECONNECTED
EEVblog #814 - Keysight N8762A 600V 5100W PSU Teardown
A look inside a dumpster Keysight/Agilent N8762A 600V 8A System DC power supply. Where did the magic smoke escape from? PCB spark gap video: https://www.youtube.com/watch?v=vfP_65gSSBU Forum: http://www.eevblog.com/forum/blog/eevblog-814-keysight-n8762a-600v-5100w-psu-teardown/ EEVblog Ma
From playlist Teardown Tuesday
Robert YOUNG - Quantifying nonorientability and filling multiples of embedded curves
Abstract: https://indico.math.cnrs.fr/event/2432/material/17/0.pdf
From playlist Riemannian Geometry Past, Present and Future: an homage to Marcel Berger
Physics - E&M: Dis- and Re-Connecting Capacitors (1 of 16) 1-Charged, 1-Uncharged, Same Size
Visit http://ilectureonline.com for more math and science lectures! In this video I will find q1=?, q2=? of 2 capacitors C1=2uF, C2=2uF in parallel, where Q1=40uC, Q2=0 and + to +. Next video in this series can be seen: https://youtu.be/Ql_ldN81SbA
From playlist PHYSICS 39.1 CAPACITORS RECONNECTED
Physics - E&M: Dis- and Re-Connecting Capacitors (12 of 16) 3-Cap., Diff., 2-Charged, Series, + to -
Visit http://ilectureonline.com for more math and science lectures! In this video I will find q1=?, q2-?, q3=? of 3 capacitors C1=2uF, C2=2uF, C3=2uF in series, where Q1=40uC, Q2=80uC, Q3=0, + to -. Next video in this series can be seen: https://youtu.be/khZu2QLF6fg
From playlist PHYSICS 39.1 CAPACITORS RECONNECTED
Quantifying nonorientability and filling multiples of embedded curves - Robert Young
Analysis Seminar Topic: Quantifying nonorientability and filling multiples of embedded curves Speaker: Robert Young Affiliation: New York University; von Neumann Fellow, School of Mathematics Date: October 5, 2020 For more video please visit http://video.ias.edu
From playlist Mathematics
Physics - E&M: Dis- and Re-Connecting Capacitors (9 of 16) 3-Cap., Same Size, 1-Charged, Parallel
Visit http://ilectureonline.com for more math and science lectures! In this video I will find q1=?, q2-?, q3=? of 3 capacitors C1=2uF, C2=2uF, C3=2uF in parallel, where Q1=40uC, Q2=0, Q3=0. Next video in this series can be seen: https://youtu.be/8oeHE3C8Bhg
From playlist PHYSICS 39.1 CAPACITORS RECONNECTED
Physics - E&M: Dis- and Re-Connecting Capacitors (7 of 16) 3-Cap., Same Size, 1-Charged, Series
Visit http://ilectureonline.com for more math and science lectures! In this video I will find q1=?, q2-?, q3=? of 3 capacitors C1=2uF, C2=2uF, C3=4uF in series, where Q1=40uC, Q2=0, Q3=0. Next video in this series can be seen: https://youtu.be/QPzyLkYKcaU
From playlist PHYSICS 39.1 CAPACITORS RECONNECTED
EEVblog 1448 - Convert a Fluke 77 IV to True RMS for 10 CENTS!*
How to convert a Fluke 77 IV average responding multimeter into a True RMS model 177 for 10 cents. *Plus calibration gear Should also work for converting a Fluke 83V to 87V True RMS measurement vs Average Responding And how to calibrate a Fluke multimeter. Fluke 87V service manual with sc
From playlist Multimeter Reviews
Extreme teardown - Simplex 35mm cinema projector - Part 8 Ballast
A teardown of the Strong International 7kW Xenon short arc lamp ballast
From playlist Teardowns
PDEs vs. Geometry: analytic characterizations of geometric properties of sets - Svitlana Mayboroda
Members’ Colloquium Topic: PDEs vs. Geometry: analytic characterizations of geometric properties of sets Speaker: Svitlana Mayboroda Affiliatrion: University of Minnesota Date: February 07, 2022 In this talk we will discuss connections between the geometric and analytic/PDE properties of
From playlist Mathematics
We restore a Hewlett-Packard 711A, a 500V power supply from the tube era, in preparation for future high voltage tubery. Our sponsors - PCBWay: fast turn PCBs, https://www.pcbway.com - Electro-Rent: https://www.electrorent.com - Keysight: test instruments: https://www.keysight.com - Samte
From playlist HP Vintage Test Equipment
EEVblog #1164 - Xbox Engineering Baptism Of Fire
A retro look at the 2005 Xbox 14 million unit power cord replacement issue and a teardown and analysis of the supplied protection device from Microsoft. Some interesting engineering lessons to be learned. UPDATE: Apparently what this is an "Arc Fault Circuit Interrupter" (AFCI) that contin
From playlist Electronics Design / Build
KS-650M mini video recorder review & teardown
A look at a cute little spy-cam composite video recorder.
From playlist Reviews
This shows a 3d print of a mathematical sculpture I produced using shapeways.com. This model is available at http://shpws.me/2A3R
From playlist 3D printing
EEVblog #272 - Manson 9400 40A 3-15V Switchmode PSU Teardown
Service Manual: http://eevblog.com/files/SPS9400_ServiceManual.pdf What's inside the Manson SPS9400 40A 3V to 15V Switchmode Power Supply? Also known as the Jaycar Powertech MP3090 and BK Precision 1692
From playlist Electronics Teardowns