Ural Federal University

About: Ural Federal University is a education organization based out in Yekaterinburg, Russia. It is known for research contribution in the topics: Magnetization & Alloy. The organization has 8881 authors who have published 14941 publications receiving 93052 citations. The organization is also known as: Ural Federal University named after the first President of Russia B. N. Yeltsin & Ural Federal University Press.

Chelyabinsk airburst, damage assessment, meteorite recovery, and characterization

Abstract: The asteroid impact near the Russian city of Chelyabinsk on 15 February 2013 was the largest airburst on Earth since the 1908 Tunguska event, causing a natural disaster in an area with a population exceeding one million. Because it occurred in an era with modern consumer electronics, field sensors, and laboratory techniques, unprecedented measurements were made of the impact event and the meteoroid that caused it. Here, we document the account of what happened, as understood now, using comprehensive data obtained from astronomy, planetary science, geophysics, meteorology, meteoritics, and cosmochemistry and from social science surveys. A good understanding of the Chelyabinsk incident provides an opportunity to calibrate the event, with implications for the study of near-Earth objects and developing hazard mitigation strategies for planetary protection.

The MLL recombinome of acute leukemias in 2017

Abstract: Chromosomal rearrangements of the human MLL/KMT2A gene are associated with infant, pediatric, adult and therapy-induced acute leukemias. Here we present the data obtained from 2345 acute leukemia patients. Genomic breakpoints within the MLL gene and the involved translocation partner genes (TPGs) were determined and 11 novel TPGs were identified. Thus, a total of 135 different MLL rearrangements have been identified so far, of which 94 TPGs are now characterized at the molecular level. In all, 35 out of these 94 TPGs occur recurrently, but only 9 specific gene fusions account for more than 90% of all illegitimate recombinations of the MLL gene. We observed an age-dependent breakpoint shift with breakpoints localizing within MLL intron 11 associated with acute lymphoblastic leukemia and younger patients, while breakpoints in MLL intron 9 predominate in AML or older patients. The molecular characterization of MLL breakpoints suggests different etiologies in the different age groups and allows the correlation of functional domains of the MLL gene with clinical outcome. This study provides a comprehensive analysis of the MLL recombinome in acute leukemia and demonstrates that the establishment of patient-specific chromosomal fusion sites allows the design of specific PCR primers for minimal residual disease analyses for all patients.

Chiral magnetic soliton lattice on a chiral helimagnet.

Abstract: Using Lorenz microscopy and small-angle electron diffraction, we directly present that the chiral magnetic soliton lattice (CSL) continuously evolves from a chiral helimagnetic structure in small magnetic fields in ${\mathrm{Cr}}_{1/3}{\mathrm{NbS}}_{2}$. An incommensurate CSL undergoes a phase transition to a commensurate ferromagnetic state at the critical field strength. The period of a CSL, which exerts an effective potential for itinerant spins, is tuned by simply changing the field strength. Chiral magnetic orders observed do not exhibit any structural dislocation, indicating their high stability and robustness in ${\mathrm{Cr}}_{1/3}{\mathrm{NbS}}_{2}$.

N-Doped Porous Molybdenum Carbide Nanobelts as Efficient Catalysts for Hydrogen Evolution Reaction

Abstract: Electrochemical water splitting has been highly valued as a clean and sustainable method to produce hydrogen with high purity and large quantity. Platinum (Pt) possesses excellent performance for hydrogen evolution reaction (HER), however, the expensiveness and rareness still restricts its broad application. Here, an environmentally-friendly and template-free method is developed to synthesize N-doped molybdenum carbide in three different forms: nanobelts, nanorods and nanoparticles. During the synthesis, no additional acid or alkali aqueous solution is used and the morphology is controlled by adjusting water content and treatment time. The corresponding physicohemical and electrochemical results display that the nanobelts with porous nanostructure exhibit excellent activity and good stability for HER both in acidic and alkaline electrolytes. In the latter case (1.0 M KOH aqueous solution), nanobelts show a small onset potential value (–52 mV), yield a current density of 10 mA cm−2 at a relatively low overpotential (110 mV) and exhibit a low Tafel slope (49.7 mV dec−1). From the obtained results is deduced that this is a facile way to prepare cost-effective molybdenum carbide with high efficiency for hydrogen evolution.

Diagrammatic routes to nonlocal correlations beyond dynamical mean field theory

Abstract: Strong electronic correlations pose one of the biggest challenges to solid state theory. We review recently developed methods that address this problem by starting with the local, eminently important correlations of dynamical mean field theory (DMFT). On top of this, non-local correlations on all length scales are generated through Feynman diagrams, with a local two-particle vertex instead of the bare Coulomb interaction as a building block. With these diagrammatic extensions of DMFT long-range charge-, magnetic-, and superconducting fluctuations as well as (quantum) criticality can be addressed in strongly correlated electron systems. We provide an overview of the successes and results achieved---hitherto mainly for model Hamiltonians---and outline future prospects for realistic material calculations.