Degrees of general hardness (dGH or °GH) is a unit of water hardness, specifically of general hardness. General hardness is a measure of the concentration of divalent metal ions such as calcium (Ca2+) and magnesium (Mg2+) per volume of water. Specifically, 1 dGH is defined as 10 milligrams (mg) of calcium oxide (CaO) per litre of water. Since CaO has a molar mass of 56.08 g/mol, 1 dGH is equivalent to 0.17832 mmol per litre of elemental calcium and/or magnesium ions. In water testing, paper strips often measure hardness in parts per million (ppm), where one part per million is defined as one milligram of calcium carbonate (CaCO3) per litre of water. Consequently, 1 dGH corresponds to 10 ppm CaO but 17.848 ppm CaCO3 which has a molar mass of 100.09 g/mol. (Wikipedia).
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From playlist DMRG
Vodafone-Happy to Help Ad (full)
In some very special way I still remain loyal to this brand,yet another spectaculary meaningful ad from O&M..gd going
From playlist Advertisements
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From playlist DMRG
T. Richard - Advanced basics of Riemannian geometry 1
We will present some of the tools used by the more advanced lectures. The topics discussed will include : Gromov Hausdorff distance, comparison theorems for sectional and Ricci curvature, the Bochner formula and basics of Ricci flow.
From playlist Ecole d'été 2021 - Curvature Constraints and Spaces of Metrics
T. Richard - Advanced basics of Riemannian geometry 1 (version temporaire)
We will present some of the tools used by the more advanced lectures. The topics discussed will include : Gromov Hausdorff distance, comparison theorems for sectional and Ricci curvature, the Bochner formula and basics of Ricci flow.
From playlist Ecole d'été 2021 - Curvature Constraints and Spaces of Metrics
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From playlist DMRG
Zoom Talk & Problem Solving Session, Andrey Konyaev: Tuesday 15 February
SMRI -MATRIX Symposium: Nijenhuis Geometry and Integrable Systems Week 2 (MATRIX): Zoom Talk by Andrey Konyaev, followed by Problem Solving Session 15 February 2022 ---------------------------------------------------------------------------------------------------------------------- SMRI
From playlist MATRIX-SMRI Symposium: Nijenhuis Geometry and integrable systems
This lecture is on Introduction to Higher Mathematics (Proofs). For more see http://calculus123.com.
From playlist Proofs
A uniform Bogomolov type of theorem for curves over global fields - Xinyi Yuan
Joint IAS/Princeton University Number Theory Seminar Topic: A uniform Bogomolov type of theorem for curves over global fields Speaker: Xinyi Yuan Affiliation: Beijing International Center for Mathematical Research Date: September 15, 2021 In the recent breakthrough on the uniform Mordel
From playlist Mathematics
Facundo Mémoli (5/2/21): The Gromov-Hausdorff distance between spheres
The Gromov-Hausdorff distance is a fundamental tool in Riemanian geometry, and also in applied geometry and topology. Whereas it is often easy to estimate the value of the distance between two given metric spaces, its precise value is rarely easy to determine. In this talk I will describe
From playlist TDA: Tutte Institute & Western University - 2021
A review of the notes common to all formations of a G chord.
From playlist Music Lessons
From playlist Getting Started in Cryo-EM
Quantized Energy Equation (Quantum Physics)
#Quantum #Physics #Engineering #tiktok #NicholasGKK #shorts
From playlist Quantum Mechanics
Open Source vs. Closed Source Software
In this video, you’ll learn more about the differences between open-source software and closed-source software. Visit https://edu.gcfglobal.org/en/basic-computer-skills/ for more technology, software, and computer tips. We hope you enjoy!
From playlist Technology Trends
Chair's Talk -- Conjectures (Vladimir Matveev) & Zoom Talk (Andrey Konyaev): Monday 14 February
SMRI -MATRIX Symposium: Nijenhuis Geometry and Integrable Systems Week 2 (MATRIX),14 February 2022 0:00:00 Chair's Talk -- Conjectures, Vladimir Matveev 0:50:55 Zoom Talk, Andrey Konyaev 1:32:58 Questions from the Audience ----------------------------------------------------------------
From playlist MATRIX-SMRI Symposium: Nijenhuis Geometry and integrable systems