Fast Quantitative 1H–13C Two-Dimensional NMR with Very High Precision

2013 ◽  
Vol 85 (9) ◽  
pp. 4777-4783 ◽  
Author(s):  
Estelle Martineau ◽  
Serge Akoka ◽  
Renaud Boisseau ◽  
Benoît Delanoue ◽  
Patrick Giraudeau

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Michael C. Abbott ◽  
Zoltán Bajnok ◽  
János Balog ◽  
Árpád Hegedűs ◽  
Saeedeh Sadeghian

Abstract We analyze the free energy of the integrable two dimensional O(4) sigma model in a magnetic field. We use Volin’s method to extract high number (2000) of perturbative coefficients with very high precision. The factorial growth of these coefficients are regulated by switching to the Borel transform, where we perform several asymptotic analysis. High precision data allowed to identify Stokes constants and alien derivatives with exact expressions. These reveal a nice resurgence structure which enables to formulate the first few terms of the ambiguity free trans-series. We check these results against the direct numerical solution of the exact integral equation and find complete agreement.



2020 ◽  
Vol 499 (3) ◽  
pp. 4418-4431 ◽  
Author(s):  
Sujatha Ramakrishnan ◽  
Aseem Paranjape

ABSTRACT We use the Separate Universe technique to calibrate the dependence of linear and quadratic halo bias b1 and b2 on the local cosmic web environment of dark matter haloes. We do this by measuring the response of halo abundances at fixed mass and cosmic web tidal anisotropy α to an infinite wavelength initial perturbation. We augment our measurements with an analytical framework developed in earlier work that exploits the near-lognormal shape of the distribution of α and results in very high precision calibrations. We present convenient fitting functions for the dependence of b1 and b2 on α over a wide range of halo mass for redshifts 0 ≤ z ≤ 1. Our calibration of b2(α) is the first demonstration to date of the dependence of non-linear bias on the local web environment. Motivated by previous results that showed that α is the primary indicator of halo assembly bias for a number of halo properties beyond halo mass, we then extend our analytical framework to accommodate the dependence of b1 and b2 on any such secondary property that has, or can be monotonically transformed to have, a Gaussian distribution. We demonstrate this technique for the specific case of halo concentration, finding good agreement with previous results. Our calibrations will be useful for a variety of halo model analyses focusing on galaxy assembly bias, as well as analytical forecasts of the potential for using α as a segregating variable in multitracer analyses.



2021 ◽  
Vol 9 ◽  
Author(s):  
Zhigang Bao ◽  
László Erdős ◽  
Kevin Schnelli

Abstract We prove that the energy of any eigenvector of a sum of several independent large Wigner matrices is equally distributed among these matrices with very high precision. This shows a particularly strong microcanonical form of the equipartition principle for quantum systems whose components are modelled by Wigner matrices.



2017 ◽  
Vol 5 (43) ◽  
pp. 11267-11274 ◽  
Author(s):  
Fazel Shojaei ◽  
Hong Seok Kang

We propose a two-dimensional BP3crystal with a very high electron mobility of 4.6 × 104cm2V−1s−1. Bilayer formation, specifically stacking pattern AA, results in an even higher electron mobility of ∼3.7 × 105cm2V−1s−1, which is ∼2500 times larger than that of an α phosphorene bilayer.



Author(s):  
Fabien Malbet ◽  
Alexis Brandeker ◽  
Alain Léger ◽  
Bjorn Jakobsson ◽  
Renaud Goullioud ◽  
...  


2021 ◽  
Vol 73 (4) ◽  
pp. 045102 ◽  
Author(s):  
Muhammad Idrees ◽  
Humaira Kalsoom ◽  
Bakth Amin Bacha ◽  
Arif Ullah ◽  
Li-Gang Wang


Author(s):  
Prasanna Dnyaneshwar Patil ◽  
Milinda Wasala ◽  
Rana Alkhaldi ◽  
Lincoln Weber ◽  
Kiran Kumar Kovi ◽  
...  

A wide variety of two-dimensional (2D) metal dichalcogenide compounds have recently attracted much research interest due to their very high photoresponsivities (R) making them excellent candidates for optoelectronic applications. High...



1988 ◽  
Vol 52 (13) ◽  
pp. 1086-1088 ◽  
Author(s):  
M. Shayegan ◽  
V. J. Goldman ◽  
C. Jiang ◽  
T. Sajoto ◽  
M. Santos


Author(s):  
Afif Alfa Robi ◽  
Hobri . ◽  
Dafik .

This study aims to analyze the critical thinking skills of P21 students in solving Arithmetic Two Dimensional problems through the application of Guided Discovery Learning. GDL is a learning process that occurs when students are not presented  with material in final form but learners are expected to organize their own material with guidance from educators if needed. Implementation of GDL in learning process is expected to improve students' thinking ability, especially critical thinking ability version P21. According to P21, in the 21st century, every individual is required to have 4C's skills in order to compete globally and one of 4C's skills is critical thinking. By having these skills, learners are expected to achieve success in life and work. The subjects of this study are discrete mathematics class students, as many as 64 students. Research steps are by providing initial knowledge of Two Dimensional Arithmetic materials through GDL method and Student Worksheet (LKM) then at the end of student learning work on Test Mastery of Teaching Materials (TPBA). The test results are then analyzed using the P21 critical thinking indicator that is reasoned effectively, using a system of thinking, making judgments and decisions. From the analysis result of Teaching Material Mastery Test obtained data about critical thinking level of students, in class A there are 25 students being in very high category (level 4), 10 students are in high category (level 3) and 9 students are in medium category (level 2). While in class C there are 22 students being in very high category (level 4), 4 students are in high category (level 3) and 4 students are in medium category (level 2). The study also produced a two dimensional arithmetic monograph. From the results of this study can be concluded that the application of GDL has a positive effect in developing students' critical thinking skills in solving two-dimensional arithmetic problems.



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