Precision Quantum Hall Resistance Measurement on Epitaxial Graphene Device in Low Magnetic Field

Precision quantum Hall resistance (QHR) measurements were performed on large-area epitaxial graphene device at low magnetic fields (B = 2 T - 8 T) at temperature T = 1.5 K. Hall resistance was measured using Cryogenic Current Comparator resistance bridge with high biasing current Isd = 40 micro ampere. The results showed that at B = 8 T the relative deviation of Hall resistance from the expected quantized value h/2e2 is within experimental uncertainty of 3.5 parts in 108 and remained below 0.35 parts per million (ppm) down to B = 3 T

Role of Toll-like receptors in development of postpartum endometritis

The aim of the study was to establish the association between expression of TLR1 (ligands - triacyl lipopeptides), TLR2 (ligands - lipopeptides, lipoteichoic acid, zymosan), and TLR 5 (ligand - flagellin) of cervical epithelial cells in vivo and development of postpartum endometritis in women with high infection riskyesBelgorod State Universit

Structure and operational properties of porous cermets on the basis of alloyed steel scale

Compositions of batches for obtaining porous cermets on the basis of alloyed steel scale with addition of ferrosilicon have been developed. Roentgenograms of the obtained alloys were shown, mechanical durability and porosity of the obtained materials were investigated. The model of formation of porous cermets was offere

Psycho-pedagogical support of professional self as a social worker in the period of study in further education

The article deals with issues of professional improvement of social workers, the role of psychological and pedagogical support their professional and personal development during the period of study in the system of additional professional education, forms, methods, technologies of the educational process, contributing to this development.В статье рассматриваются вопросы профессионального самосовершенствования социальных работников, роль психолого-педагогического сопровождения их профессионально-личностного развития в период обучения в системе дополнительного профессионального образования, формы, методы, технологии учебно-образовательного процесса, способствующие данному развитию

Influence of various factors on chemical decomposition of oxyethylated isononylphenols

Oxidative decomposition of difficultly biodegradable nonionic surfactants, oxyethylated phenols with various degrees of oxyethylation (Neonols AF 9-6, 9-10, 9-12), was examined. The initial rate and extent of the oxidation depend on the degree of oxyethylation, anion of the iron salt added, and temperatureye

Формирование коллекций древнеегипетских памятников в российских музеях в начале XX в.

The article describes the history of the formation of the Egyptian collections in non-core Russian museums in the late XIX – early XX century. At this time, the owners of private collections began to sell and donate to various museums monuments of ancient Egyptian art. Initially, this phenomenon was due to their patriotism and desire to «serve the motherland», but at the beginning of XX century, it has become more necessary measure, since begun forced nationalization of works of art that were in private hands. In any case, such a fact contributed to the expansion of domestic resource base of Egyptology and has enabled many of them to enter into scholarly.Статья посвящена истории формирования египетских коллекций в непрофильных музеях России в конце XIX – начале XX в. Передача памятников из индивидуальных собраний в музеи способствовало расширению материальной базы отечественной египтологии и дало возможность их ввести в научный оборот

К истории изучения частных коллекций древнеегипетских памятников в России

The article is devoted to studying the history of the monuments in private collections of ancient Egyptian art in Russia. In modern conditions of a specific competition and the negative attitude of the museum community to private collectors is especially important to pay attention to the history of the formation of the material base of the collections of ancient Egyptian monuments in the Russian museums and indicate the important role of collectors in the history of the formation and development of domestic Egyptology.Статья посвящена истории изучения частных коллекций памятников древнеегипетского искусства в России. В условиях наличия определенной конкуренции и негативного отношения музейного сообщества к частным коллекционерам особенно важно обратить внимание на историю формирования материальной базы коллекций древнеегипетских памятников в российских музеях и указать на важную роль собирателей в истории становления и развития отечественной египтологии

Corporate social responsibility: to the issue of origins

The article substantiates the need for a unified approach to the study of such economic phenomena as corporate social responsibility, business ethics, corporate culture and sustainable development. The author proposes to develop A. Carroll’s ideas on the gradual increase in the level of social responsibility of business as it develops on the basis of the renewability principle of economic and non-economic benefits. The objective nature of business participation in the production of not only economic, but also non-economic resources is substantiated. Risks for businesses of prematurely taking on excess obligations are noted. The article explains the need for an existential choice of the enterprise management to take responsibility for the consequences of its activities as a condition for implementing the concept of corporate social responsibility. The implementation of this choice occurs at a certain level of development of the individuals involved in the business

Spin disorder scattering in a ferromagnetic insulator-on-graphene structure

We theoretically study the transport properties of a single graphene layer between two insulating materials, i.e., a ferromagnetic EuO thin film and a nonmagnetic SiC substrate. An exchange interaction between the charge carrier spins in graphene and the localized magnetic moments in the ferromagnetic insulator is assumed. This proximity effect and the large spin fluctuations at temperatures close to the ferromagnetic transition temperature TC lead to spin disorder scattering, which is calculated using a Green's function technique. Numerical results indicate that at temperatures close to TC the contribution of the spin disorder scattering to the total electron mobility is clearly observable even in the case of a weak exchange interaction and a low background mobility of the graphene layer. This enables the experimental determination of the exchange interaction parameter using the present model and a simple resistivity measurement.Peer reviewe