Earth Prediction Innovation Center的动态

We are proud to share a big milestone with the release of the Common Community Physics Package (CCPP) v7.0.0. The CCPP is a state-of-the-art infrastructure designed to facilitate community-wide development of atmospheric physics parameterizations, support their interoperability among different modeling centers, and enable the transition of research to operations in NWP and climate modeling. The CCPP consists of two elements: the Physics (a repository of parameterizations) and the Framework (an infrastructure for interfacing the parameterizations with host models).

#QTNano: With the aim to improve the current knowledge concerning small oxide clusters, we employed a framework based on the combination of the Tree-Growth scheme and Euclidean Similarity Distance (TG-ESD) algorithm to obtain a reliable set of structures for (MO2 )n , where n = 1 ? 15 and M = Ti, Zr, and Ce. All selected configurations are evaluated by density functional theory calculations, which yields insights into the behavior the physical and chemical properties as function of size. Through the titania systems, we validate the TG-EDS algorithm, which yield the same putative global minimum configurations (pGMCs) found in the literature, or even structures with smaller energies. https://lnkd.in/dk7UGVeP https://lnkd.in/dXbwv4Nu

1950?The National Bureau of Standards dedicates its Standards Western Automatic Computer (SWAC) at the Institute for Numerical Analysis in Los Angeles. Rather than testing components like its companion, the SEAC, the SWAC had an objective of computing using relatively off-the-shelf technology. It used a Williams Tube -- a modified CRT capable of modest (256 word) electrostatic bit storage -- and a magnetic drum (4,096 words) for storage. The word length was 37-bits and it could add two operands in 64 microseconds. The SWAC performed much useful work, including searching for Mersenne prime numbers, X-ray crystallography, linear and differential equation solving and operated until December 1967. Parts of SWAC are on display at The Computer History Museum. *CHM #onthisdayinmath

BUILDING HEFT. “Connecting various structures of this kind gives rise to the space–time bulk, thanks to a circle of connections between different parts of the CFT surface.” (CFT = conformal field theories). https://lnkd.in/d9N6gZcS

New paper published: A multiscale fracture model using peridynamic enrichment of finite elements within an adaptive partition of unity: Experimental validation https://lnkd.in/gcpzQ4YS

Alhamdulillah ( Praise be to Almighty ) My second journal, “Elastic bound modes in the continuum in architected beams”, published in the Physical Review Applied. Bound modes in the continuum (BICs) is a new class of localized modes found in frequency passband. This work is one of the forefront works on elastic BICs where I am able to observe an elastic BIC experimentally. Besides the experiment, I also discuss the theoretical and computational aspects of the work before concluding the experiment that means a complete discussion about the elastic BIC. This work can be used as general framework to have BICs in arbitrary compact region based on the symmetry of the structure. Here is the article link: https://lnkd.in/gt8h3XT7 It was a long cherished wish to have a journal in the Physical Review and finally it is done. ??

Hi everyone. We just released a paper describing how we characterize our readout system. I wrote this paper for students learning how superconducting qubit readout works, and for pros who need reliable characterization on systems too large to be handled manually. https://lnkd.in/gFrDpzjS

This video is a new lesson on ‘Physical quantity question’. It is a selected response question (MCQ).??I have chosen this topic to give you, the?basic concept of theory behind the question. It is usually a twisted question. Options are very near to the right answer but you have to look very carefully to reach the correct option. It consists of definitions and numerical. The material level of this topic is suitable for GCE AS, A-Level and IB Physics students. Intermediate or FSc. students will definitely get advantage as well to increase their understanding of the basic Physics.

Particle measurements at the Large Hadron Collider open the door to future high-energy tests of entanglement. https://lnkd.in/dBi-s_Bz

This paper assesses several #path #loss #models, based on the #visibility through an #analytical# approach. The simple relationship valid in the #visible #spectrum can be extended to the #first #optical #window, while, at 1.550 μm, the effect of fog microphysics cannot be ignored. #Fog is definitively less challenging in the #mid-#IR (10.6 μm) even at very low visibility values (less than 0.5 km), which was not evident from #older #studies. Lower and upper bounds for the extinction coefficient are calculated and substituted into the #free-#space #optics (#FSO) link budget equation. The combined effect of the microphysics and of the accuracy of visibility measurements may result in large uncertainties on the maximum achievable #path #length. The latter is also influenced by the microclimate, as links are usually deployed in urban areas while visibility data are collected outside. Path lengths in city areas can double, for the same link availability. ----@R. Nebuloni, Elizabeth Verdugo More details can be found at this link: https://lnkd.in/gDSEu4An