Results 1 to 10 of about 8,790 (159)
Quarter-Metal Phases in Multilayer Graphene: Ising-XY and Annular Lifshitz Transitions [PDF]
Phys. Rev. B 110, 035103 (2024), 2023 Recent experiments have uncovered a distinctive magnetic metal in lightly-doped multilayer graphene, coined the \textit{quarter metal}. This quarter metal consolidates all the doped carriers, originally distributed evenly across the four (or twelve) Fermi surfaces of the paramagnetic state, into one expansive Fermi surface by breaking time-reversal and/
arxiv +1 more source
When the quarter jumps into a cup (and when it does not) [PDF]
, 2020 While Bernoulli's equation is one of the most frequently mentioned topics in Physics literature and other means of dissemination, it is also one of the least understood. Oddly enough, in the wonderful book "Turning the world inside out" [1], Robert Ehrlich proposes a demonstration that consists of blowing a quarter dollar coin into a cup, incorrectly ...
arxiv +1 more source
No Evidence for Galactic Latitude Dependence of the Fast Radio Burst Sky Distribution [PDF]
, 2021 We investigate whether the sky rate of Fast Radio Bursts depends on Galactic latitude using the first catalog of Fast Radio Bursts (FRBs) detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project. We first select CHIME/FRB events above a specified sensitivity threshold in consideration of the radiometer ...
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Normalized insured losses caused by windstorms in Quebec and Ontario, Canada, in the period 2008-2021 [PDF]
arXiv, 2023 Severe windstorms pose threats to people, human-made structures, and the environment. An investigation of insured losses caused by windstorms is a multipurpose study that serves to advance the resilience and sustainability of modern communities. The present study proposes a systematic analysis of insured losses imposed by different types of windstorms ...
arxiv
Æquitas: Two-Player Counterfeit Coin Games [PDF]
arXiv, 2022 We discuss games involving a counterfeit coin. Given one counterfeit coin among a number of otherwise identical coins, two players with full knowledge of the fake coin take turns weighing coins on a two-pan scale, under the condition that on every turn they reveal some information to an Observer with limited prior knowledge about the coins.
arxiv
The change-making problem for six coin values and beyond [PDF]
arXiv, 2023 The change-making problem asks: given a positive integer $v$ and a collection $C$ of integer coin values $c_1=1
arxiv
Mathematical formulae on coins, parts I and II [PDF]
Canadian Numismatic Journal vol. 61 no. 4 pp. 167-188 , 2016 (part
1); Canadian Numismatic Journal vol 61 no. 5 pp. 208-213, 2016 (part 2), 2016 In the article "The Tale of Two Queens and Two Towering Figures" published in CNJ in 2012 (CNJ vol. 57 No. 5, pp. 304-315), we discussed the contributions of Copernicus and Newton to coin minting and monetary reforms, as well as the commemoration of their achievements on contemporary coins.
arxiv
Mathematics on coins, part I: The Tale of Two Queens and Two Towering Figures [PDF]
The Canadian Numismatic Journal, vol. 57 No. 5 (2012), pp. 304-315, 2016 In the first article in the series examining mathematics on coins, we discuss two great scientists who are not only featured on many coins, but also contributed to both theory and practice of coinage. The first one is Nicolaus Copernicus, author of the treaty \emph{Monetae cudendae ratio} in which he proposed the law governing competition between money
arxiv
How many ways can you make change: Some easy proofs [PDF]
arXiv, 2014 Given a dollar, how many ways are there to make change using pennies, nickels, dimes, and quarters? What if you are given a different amount of money? What if you use different coin denominations? This is a well known problem and formulas are known. We present simpler proofs in several cases.
arxiv
High-fidelity simulation of an ultrasonic standing-wave thermoacoustic engine with bulk viscosity effects [PDF]
, 2017 We have carried out boundary-layer-resolved, unstructured fully-compressible Navier--Stokes simulations of an ultrasonic standing-wave thermoacoustic engine (TAE) model. The model is constructed as a quarter-wavelength engine, approximately 4 mm by 4 mm in size and operating at 25 kHz, and comprises a thermoacoustic stack and a coin-shaped cavity, a ...
arxiv +1 more source