Stripe phase: analytical results for weakly coupled repulsive Hubbard model

Motivated by the stripe developments in cuprates, we review some analytical results of our studies of the charge- and spin density modulations (CDW and SDW) in a weakly coupled one dimensional repulsive electron system on a lattice. It is shown that close to half filling, in the high temperature regime above the mean field transition temperature, short range repulsions favor charge density fluctuations with wave vectors bearing special relations with those of the spin density fluctuations. In the low temperature regime, not only the wave vectors, but also the mutual phases of the CDW and SDW become coupled due to a quantum interference phenomenon, leading to the stripe phase instability in a quasi one-dimensional repulsive electron system. It is shown that away from half filling periodic lattice potential causes cooperative condensation of the spin and charge superlattices. "Switching off" this potential causes vanishing of the stripe order. The leading spin-charge coupling term in the effective Landau functional is derived microscopically. Results of the 1D renormalization group (parquet) analysis away from half filling are also presented, which indicate transient-scale correlations resembling the mean-field pattern. Farther, the self-consistent solution for the spin-charge solitonic superstructure in a quasi-one-dimensional electron system is obtained in the framework of the Hubbard model as a function of hole doping and temperature. Possible relationship with the stripe phase correlations observed in high T_c cuprates is discussed.Comment: 29 pages,10 figures, Late

Conductivity in Two-Dimensional Disordered Model with Anisotropic Long-Range Hopping

We consider two-dimensional system of particles localized on randomly distributed sites of squared lattice with anisotropic transfer matrix elements between localized sites. By summing of "diffusion ladder" and "cooperon ladder" type vertices we calculated the conductivity for various sites and particles densities.Comment: Latex, 10 page

Analytical stripe phase solution for the Hubbard model

The self-consistent solution for the spin-charge solitonic superstructure in quasi-one-dimensional electron system is obtained in the framework of the Hubbard model as a function of a hole doping. Effects of interchain interactions on the ground state are discussed. Results are used for the interpretation of the observed stripe phases in doped antiferromagnets.Comment: 9 pages, LaTex file, no figure

Low-energy three-body charge transfer reactions with Coulomb interaction in the final state

Three-body charge transfer reactions with Coulomb interaction in the final state are considered in the framework of coordinate-space integro-differential Faddeev-Hahn-type equations within two- and six-state close coupling approximations. The method is employed to study direct muon transfer in low-energy collisions of the muonic hydrogen H$_\mu$ by helium (He$^{++}$) and lithium (Li$^{+++}$) nuclei. The experimentally observed isotopic dependence is reproduced.Comment: 14 pages REVTeX, accepted for publication in Journal of Physics

Through the Prism of the Epoch: The Sociolinguistic Aspects of Arthur Conan Doyle’s The Red-Headed League as Translated by N. K. Chukovsky

Поступила в редакцию: 26.12.2019. Принята к печати: 14.07.2020.Submitted: 26.12.2019. Accepted: 14.07.2020.В статье рассматриваются социолингвистические аспекты перевода детективного рассказа А. Конан Дойла «The Red-Headed League» Н. К. Чуковским в контексте советской эпохи 1940-х гг. С использованием историко-литературного, сравнительно-типологического и структурного методов исследования осуществляется анализ переводческой интерпретации основных художественных образов, а также передачи сюжетной линии с учетом таких актуальных тенденций в литературе, как нейтрализация стиля, норматизация и массовизация литературы, которые, несомненно, отразились на переводе английского детективного рассказа. Целью исследования является изучение особенностей перевода рассказа «Союз рыжих» Конан Дойла Н. К. Чуковским, обусловленных спецификой литературного процесса. Материалом исследования выступает оригинальный текст рассказа «The Red-Headed League», а также его переводы, выполненные Н. К. Чуковским и опубликованные одновременно в двух издательствах: «Детгиз» и «Воениздат». Как показывает анализ, перевод, опубликованный в «Детгизе», значительно отличается от перевода «Воениздата» отсутствием серьезных сокращений и нередко лексическим выбором. Интересен факт одновременной публикации переводов издательствами различной направленности в период окончания Великой Отечественной войны, что объясняется высокой популярностью творчества Конан Дойла. Рассказы о Шерлоке Холмсе отвечали требованиям двух столь разных издательств: с одной стороны, они обладали «воспитательным» потенциалом для юного поколения, мотивировали к мыслительной деятельности. С другой стороны, рассказы о Шерлоке Холмсе реализовали функцию эскапизма. Несмотря на стремление переводчика правильно передать авторские решения, он, тем не менее, использовал ряд трансформаций: схематизация и упрощение образов героев, «одомашнивание» текста оригинала, акцент на исключительно негативной стороне образа преступника при нивелировании его привлекательности.This article analyses the sociolinguistic aspects of Arthur Conan Doyle’s The Red-Headed League as translated by N. K. Chukovsky in the light of the Soviet epoch of the 1940s. Using the historical literary, comparative, typological, and structural methods, the authors analyse the translation interpretation of the key literary images, as well as plot rendering in terms of such literary tendencies as the neutralisation of style, normatisation and massification of literature, and russification of a foreign text in order to adapt it for Russian readers. The aim of the research is the study of the translation peculiarities of The Red-Headed League in terms of the specific nature of the literary process. The authors refer to the original text of The Red-Headed League, as well as its translations carried out by N. K. Chukovsky and published by two different publishing houses Detgiz and Voenizdat. The analysis demonstrates that the translation from Detgiz differs from that of Voenizdat as there are no omissions, while the choice of vocabulary is also different. Special attention is paid to simultaneous publications of the story at the end of the Great Patriotic War. Stories about Sherlock Holmes met the requirements of both albeit different publishing houses: they had an educational potential and encouraged mental activity in the young generation. They also performed the function of escapism. Although the translator made attempts to render the writer’s choices correctly, he made a number of transformations, i.e. he schematised and simplified the images of the characters, “domesticated” the original text and emphasised the negative qualities of the criminal’s image while leveling their attractiveness

Gene Amplification as a Mechanism of Yeast Adaptation to Nonsense Mutations in Release Factor Genes

Protein synthesis (translation) is one of the fundamental processes occurring in the cells of living organisms. Translation can be divided into three key steps: initiation, elongation, and termination. In the yeast Saccharomyces cerevisiae, there are two translation termination factors, eRF1 and eRF3. These factors are encoded by the SUP45 and SUP35 genes, which are essential; deletion of any of them leads to the death of yeast cells. However, viable strains with nonsense mutations in both the SUP35 and SUP45 genes were previously obtained in several groups. The survival of such mutants clearly involves feedback control of premature stop codon readthrough; however, the exact molecular basis of such feedback control remain unclear. To investigate the genetic factors supporting the viability of these SUP35 and SUP45 nonsense mutants, we performed whole-genome sequencing of strains carrying mutant sup35-n and sup45-n alleles; while no common SNPs or indels were found in these genomes, we discovered a systematic increase in the copy number of the plasmids carrying mutant sup35-n and sup45-n alleles. We used the qPCR method which confirmed the differences in the relative number of SUP35 and SUP45 gene copies between strains carrying wild-type or mutant alleles of SUP35 and SUP45 genes. Moreover, we compare the number of copies of the SUP35 and SUP45 genes in strains carrying different nonsense mutant variants of these genes as a single chromosomal copy. qPCR results indicate that the number of mutant gene copies is increased compared to the wild-type control. In case of several sup45-n alleles, this was due to a disomy of the entire chromosome II, while for the sup35-218 mutation we observed a local duplication of a segment of chromosome IV containing the SUP35 gene. Taken together, our results indicate that gene amplification is a common mechanism of adaptation to nonsense mutations in release factor genes in yeast.RSF grant 18-14-00050; State Research Program (0112-2016-0015

Fel Potential of the High Current Erls at Bnl.

An ampere class 20 MeV superconducting Energy Recovery Linac (ERL) is under construction at Brookhaven National Laboratory (BNL) for testing concepts for high-energy electron cooling and electron-ion colliders. This ERL prototype will be used as a test bed to study issues relevant for very high current ERLs. High average current and high performance of electron beam with some additional components make this ERL an excellent driver for high power far infrared Free Electron Laser (FEL). A possibility for future up-grade to a two-pass ERL is considered. We present the status and our plans for construction and commissioning of the ERL. We discus a FEL potential based on electron beam provided by BNL ERL

The level of air pollution in the impact zone of coal-fired power plant (Karaganda City) using the data of geochemical snow survey (Republic of Kazakhstan)

Coal-fired power plants emissions impact the air quality and human health. Of great significance is assessment of solid airborne particles emissions from those plants and distance of their transportation. The article presents the results of air pollution assessment in the zone of coal-fired power plant (Karaganda City) using snow survey. Based on the mass of solid airborne particles deposited in snow, time of their deposition on snow at the distance from 0.5 to 4.5 km a value of dust load has been determined. It is stated that very high level of pollution is observed at the distance from 0.5 to 1 km. there is a trend in decrease of dust burden value with the distance from the stacks of coal-fired power plant that may be conditioned by the particle size and washing out smaller ash particles by ice pellets forming at freezing water vapour in stacks of the coal-fired power plant. Study in composition of solid airborne particles deposited in snow has shown that they mainly contain particulates of underburnt coal, Al-Si- rich spheres, Fe-rich spheres, and coal dust. The content of the particles in samples decreases with the distance from the stacks of the coal-fired power plant

Scanning Electron Microscopy Study of Drilling Cuttings in Tomsk Oblast Sites

The research is focused on determining mineralogical composition of drilling cuttings by scanning electron microscope as well as imaging the sample surface of high resolution that allows studying the structural characteristics of the site. In addition, a number of other techniques permit obtaining information on chemical composition of sample in near-surface layers. The study in drilling cuttings by means of scanning microscopy has revealed the presence of titanium, iron, zirconium oxides, iron sulphide, barium sulphate. The former is a mineral that concentrates rare-earth elements, presumably monocyte, as well as uranium silicate, etc. The results obtained confirm the data of previous X-ray structural analysis, i.e. the study samples consist of alumosilicate matrix. Apart from silicon and aluminium oxides, the matrix includes such elements as Na, K, Mg. Such a composition corresponds to rock-forming minerals: quartz, albite, microcline, clinochlore, muscovite, anorthoclase

Magnetic and charge structures in itinerant-electron magnets: Coexistence of multiple SDW and CDW

A theory of Kondo lattices is applied to studying possible magnetic and charge structures of itinerant-electron antiferromagnets. Even helical spin structures can be stabilized when the nesting of the Fermi surface is not sharp and the superexchange interaction, which arises from the virtual exchange of pair excitations across the Mott-Hubbard gap, is mainly responsible for magnetic instability. Sinusoidal spin structures or spin density waves (SDW) are only stabilized when the nesting of the Fermi surface is sharp enough and a novel exchange interaction arising from that of pair excitations of quasi-particles is mainly responsible for magnetic instability. In particular, multiple SDW are stabilized when their incommensurate ordering wave-numbers $\pm{\bf Q}$ are multiple; magnetizations of different $\pm{\bf Q}$ components are orthogonal to each other in double and triple SDW when magnetic anisotropy is weak enough. Unless $\pm 2{\bf Q}$ are commensurate, charge density waves (CDW) with $\pm 2{\bf Q}$ coexist with SDW with $\pm{\bf Q}$. Because the quenching of magnetic moments by the Kondo effect depends on local numbers of electrons, the phase of CDW or electron densities is such that magnetic moments are large where the quenching is weak. It is proposed that the so called stipe order in cuprate-oxide high-temperature superconductors must be the coexisting state of double incommensurate SDW and CDW.Comment: 10 pages, no figure