Multiple Quantum NMR Dynamics in Dipolar Ordered Spin Systems

We investigate analytically and numerically the Multiple Quantum (MQ) NMR dynamics in systems of nuclear spins 1/2 coupled by the dipole-dipole interactions in the case of the dipolar ordered initial state. We suggest two different methods of MQ NMR. One of them is based on the measurement of the dipolar temperature in the quasi-equilibrium state which establishes after the time of order T2 after the MQ NMR experiment. The other method uses an additional resonance 45^0 -pulse after the preparation period of the standard MQ NMR experiment in solids. Many-spin clusters and correlations are created faster in such experiments than in the usual MQ NMR experiments and can be used for the investigation of many-spin dynamics of nuclear spins in solids.Comment: 11 pages, 3 figures. accepted for publication in Physical Review

Formation of human capital as a key factor in ensuring the national security of agriculture in the digital economy

Over the past few years in many literary sources and the media an issue of the digital economy is rapidly gaining popularity due to the qualitative technological changes in society. In current circumstances the qualitative component of labor resources called “human capital” is a priority value. The authors have identified the main realities of the development of agribusiness, studied the main directions of information support on the example of the agricultural sector of the economy and identified the root causes of the slowdown in the innovation development of agriculture in Russia, the features of using information technologies in agribusiness have been considered in detail.peer-reviewe

Constructions of regular algebras Lpw(G)L_p^w(G)

Criterion of (Shilov) regularity for weighted algebras $L_1^w(G)$ on a locally compact abelian group $G$ is known by works of Beurling (1949) and Domar (1956). In the present paper this criterion is extended to translation invariant weighted algebras $L_p^w(G)$ with $p>1$. Regular algebras $L_p^w(G)$ are constructed on any sigma-compact abelian group $G$. It was proved earlier by the author that sigma-compactness is necessary (in the abelian case) for the existence of weighted algebras $L_p^w(G)$ with $p>1$.Comment: Submitted to Mat. Sborni

Effects of spin polarization on resonant photoemission from d-f states in TbNi2Mnx compounds

Resonant photoemission in narrow-band materials is described by the sum of first-and secondorder transitions, their quantum-mechanical interference leads to an increase in the spectrum from the valence bands and the appearance of an asymmetric dependence on the photon energy. These effects are studied theoretically and experimentally using the example of three-component intermetallic compounds TbNi2Mnx. The competition between the elastic and inelastic photoemission channels leads to a different dependence of photoemission spectra from nickel and manganese on photon energy. The elastic channel is realized on atoms with large magnetic moments, the inelastic Auger decay occurs on atoms with small moments. © 2018 The Authors, published by EDP Sciences.The research was carried out within the state assignment of FASO of Russia (theme uQ" ant" No. 01201463332), supported in part by RFBR (No. 18-02-00060) and UD RAS (No.15 -8 2-10). The authors express their gratitude to A. Preobrazhenskii and N. Vinogradov (synchrotron MAX-Lab, Lund, Sweden) for their assistance in carrying out experiments

Трансформация человеческого капитала в контексте нового технологического уклада

Introduction. Digital technologies are increasingly spreading in agriculture, involving an growing number of production operations in transformational processes and significantly modifying them. This has a positive effect on the quality of products and leads to an increase in labor productivity. There is a growing demand for workers who not only have the competencies in the field of agricultural production, but also the knowledge necessary to work with digital devices and robotic systems. This, in turn, creates an urgent need for the formation and constant updating of these competencies among existing and potential industry employees.Purpose setting. In the context of the transition of the agricultural industry to digital-based production, the workforce must be characterized by mobility, flexibility and digital competence. There is a need for agricultural production to train workers with digital competencies. There is a necessity for rapid management decision-making by the heads of agricultural organizations. To date, the factor of production of information quite strongly affects the process of distribution, exchange and consumption of goods. The development of theoretical and methodological approaches and practical recommendations for the formation and development of human capital of the agrarian sphere in the context of digitalization of the economy is relevant and requires further in-depth research.Methods and methodology of the study. Depending on the tasks to be solved, research methods are used: monographic, graphic, abstract-logical, bibliographic. Results. The main stages of the formation of theoretical concepts of human capital are highlighted: the emergence of a scientific formulation of the definition of «human capital» in a narrower sense, from the point of view of knowledge, skills and abilities of a person; the structure of human capital is studied, are highlighted its components: investments in healthcare, culture, as well as vocational training and retraining of people; the allocation of human capital as a fundamental factor of production; quantitative and qualitative methods for measuring human capital at the micro and macro levels have been developed. The principles are proposed, the implementation of which will contribute to the formation and development of human capital in the context of the transition to agriculture based on the use of digital technologies.Conclusion. Humanity will increasingly be connected with digital technologies in all spheres of life. In the labor market, there will be a demand for workers with completely new competencies, and therefore only those employees whose competencies are focused on the intensive introduction and use of digital platforms and specialized equipment in agriculture will be able to solve the problems of digitalization.Введение. Цифровые технологии все активнее распространяются в сельском хозяйстве, вовлекая в трансформационные процессы все большее число производственных операций и значительно видоизменяя их. Это положительно влияет на качество производимой продукции и приводит к увеличению производительности труда. Возрастает спрос на работников, обладающих не только компетенциями в области сельхозпроизводства, но и знаниями, необходимыми для работы с цифровыми устройствами и роботизированными системами. Это, в свою очередь, создает острую потребность в формировании и постоянном обновлении этих компетенций у существующих и потенциальных работников отрасли.Постановка задачи. В условиях перехода сельскохозяйственной отрасли к производству, основанному на использовании цифровых технологий, рабочая сила должна отличаться мобильностью, гибкостью и цифровой компетентностью; возникает потребность сельхозпроизводства в подготовке работников, обладающих цифровыми компетенциями; появляется необходимость быстрого принятия управленческих решений руководителями сельскохозяйственных организаций. На сегодняшний день фактор производства информации достаточно сильно влияет на процесс распределения, обмена и потребления товаров. Разработка теоретико-методологических подходов и практических рекомендаций по формированию и развитию человеческого капитала аграрной сферы в условиях цифровизации экономики является актуальной и требует дальнейшего углубленного исследования.Методика и методология исследования. В зависимости от решаемых задач применяются методы исследования: монографический, графический, абстрактно-логический, библиографический.Результаты. Выделены основные этапы формирования теоретических понятий о человеческом капитале: появление научной формулировки определения «человеческий капитал» в более узком значении, с точки зрения знаний, навыков и способностей человека; изучена структура человеческого капитала, выделены компоненты: инвестиции в здравоохранение, культуру, а также профессиональную подготовку и переподготовку людей; выделение человеческого капитала как основополагающего фактора производства; разработаны количественные и качественные методы измерения человеческого капитала на микро- и макроуровнях. Предлагаются принципы, реализация которых будет способствовать формированию и развитию человеческого капитала в условиях перехода к сельскому хозяйству, основанному на использовании цифровых технологий.Выводы. Человечество все больше будет связано с цифровыми технологиями во всех сферах жизни. На рынке труда возникает спрос на работников, обладающих совершенно новыми компетенциями. Решать задачи цифровизации смогут только те работники, чьи компетенции ориентированы на интенсивное внедрение и использование цифровых платформ и специализированной техники в сельском хозяйстве

On Graph-Theoretic Identifications of Adinkras, Supersymmetry Representations and Superfields

In this paper we discuss off-shell representations of N-extended supersymmetry in one dimension, ie, N-extended supersymmetric quantum mechanics, and following earlier work on the subject codify them in terms of certain graphs, called Adinkras. This framework provides a method of generating all Adinkras with the same topology, and so also all the corresponding irreducible supersymmetric multiplets. We develop some graph theoretic techniques to understand these diagrams in terms of a relatively small amount of information, namely, at what heights various vertices of the graph should be "hung". We then show how Adinkras that are the graphs of N-dimensional cubes can be obtained as the Adinkra for superfields satisfying constraints that involve superderivatives. This dramatically widens the range of supermultiplets that can be described using the superspace formalism and organizes them. Other topologies for Adinkras are possible, and we show that it is reasonable that these are also the result of constraining superfields using superderivatives. The family of Adinkras with an N-cubical topology, and so also the sequence of corresponding irreducible supersymmetric multiplets, are arranged in a cyclical sequence called the main sequence. We produce the N=1 and N=2 main sequences in detail, and indicate some aspects of the situation for higher N.Comment: LaTeX, 58 pages, 52 illustrations in color; minor typos correcte

Spin 1 inversion: a Majorana tensor force for deuteron alpha scattering

We demonstrate, for the first time, successful S-matrix to potential inversion for spin one projectiles with non-diagonal $S^j_{ll'}$ yielding a $T_{\rm R}$ interaction. The method is a generalization of the iterative-perturbative, IP, method. We present a test case indicating the degree of uniqueness of the potential. The method is adapted, using established procedures, into direct observable to potential inversion, fitting $\sigma$, ${\rm i}T_{11}$, $T_{20}$, $T_{21}$ and $T_{22}$ for d + alpha scattering over a range of energies near 10 MeV. The $T_{\rm R}$ interaction which we find is very different from that proposed elsewhere, both real and imaginary parts being very different for odd and even parity channels.Comment: 7 pages Revtex, 4 ps figure

Ensuring the national security of agriculture in the digital era through the formation of human capital

Purpose: Over the past few years in many literary sources and the media an issue of the digital economy is rapidly gaining popularity due to the qualitative technological changes in society. In current circumstances the qualitative component of labor resources called “human capital” is a priority value. Design/Methodology/Approach: The following research methods have been used in the work: monographic, abstract-logical, sociological, economic-mathematical and calculation-constructive ones. Findings: The solution of the problem of ensuring food security of the population of the region depends on the methods and strategies of applying technologies in domestic and global agriculture, as well as on the correct and effective use of scientific-technical implementations in the industry. Practical implications: Identification of segments in tourism is mainly made based on their geographical, demographical, socio-economic, psychographic, behavior characteristics or their combinations. On the other hand, the authors stress on the fact that there is no universal segmentation approach and therefore, potential tourists can be classified based on other characteristics. Originality/Value: The use of digital technologies in the agricultural industry will increase the efficiency of production activities.peer-reviewe