1,052 research outputs found

    Дигитализация рынка транспорта и логистики: интеграция информационных систем. Российский опыт внедрения цифровых технологий в организации логистических процессов

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    The paper summarizes the experience of using information systems in transport and logistics companies in Russia, their typologization and functionality. The definition of "smart logistics" is formulated; it contains a description of the essence of the term characterizing its specific features and effects that are achieved as a result of processes of the same name. Based on the study of the trans-logistics platforms functional structure and the “single window” evolutionary development levels, the industry and departmental participants of the logistics market, which information systems can potentially be integrated into a single information space, are identified. The relevance of the information systems integration for providing synchromodal transportation is underlined. Expert opinions on practices in the digitalization of transport and logistics processes in Russia are highlighted and summarized. Opinions on the uneven development of digitalization in the constituent entities of the Russian Federation, and also on the conditions and trends in digital logistics development are highlighted.El documento resume la experiencia del uso de sistemas de información en empresas de transporte y logística en Rusia, su tipología y funcionalidad. Se formula la definición de "logística inteligente"; contiene una descripción de la esencia del término que caracteriza sus características y efectos específicos que se logran como resultado de procesos del mismo nombre. Con base en el estudio de la estructura funcional de las plataformas trans-logísticas y los niveles de desarrollo evolutivo de "ventana única", se identifican la industria y los participantes departamentales del mercado logístico, cuyos sistemas de información se pueden integrar potencialmente en un solo espacio de información. Se subraya la relevancia de la integración de los sistemas de información para proporcionar transporte sincromodal. Se destacan y resumen las opiniones de expertos sobre prácticas en la digitalización de los procesos de transporte y logística en Rusia. Se destacan las opiniones sobre el desarrollo desigual de la digitalización en las entidades constitutivas de la Federación de Rusia, y también sobre las condiciones y tendencias en el desarrollo de la logística digital.В статье обобщен опыт использования информационных систем в транспортных и логистических компаниях России, их типологизация и функциональность. Сформулировано определение «умная логистика»; он содержит описание сущности термина, характеризующего его специфические особенности и эффекты, которые достигаются в результате одноименных процессов. На основе изучения функциональной структуры транс-логистических платформ и уровней эволюционного развития «единого окна» определены отраслевые и ведомственные участники рынка логистики, информационные системы которых потенциально могут быть интегрированы в единое информационное пространство. Подчеркивается актуальность интеграции информационных систем для обеспечения синхромодальных перевозок. Экспертные заключения о практике оцифровки транспортных и логистических процессов в России выделены и обобщены. Выделяются мнения о неравномерном развитии цифровизации в субъектах Российской Федерации, а также об условиях и тенденциях развития цифровой логистики

    An efficiency upper bound for inverse covariance estimation

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    We derive an upper bound for the efficiency of estimating entries in the inverse covariance matrix of a high dimensional distribution. We show that in order to approximate an off-diagonal entry of the density matrix of a dd-dimensional Gaussian random vector, one needs at least a number of samples proportional to dd. Furthermore, we show that with ndn \ll d samples, the hypothesis that two given coordinates are fully correlated, when all other coordinates are conditioned to be zero, cannot be told apart from the hypothesis that the two are uncorrelated.Comment: 7 Page

    ИЗУЧЕНИЕ МИГРАЦИЙ СЕЙСМИЧЕСКОЙ АКТИВНОСТИ С ПОМОЩЬЮ ПОСТРОЕНИЯ ПРОСТРАНСТВЕННО-ВРЕМЕННЫХ ДИАГРАММ

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    Seismicity migration is studied by a new method based on space-time diagrams and a combination of cluster and regression analyses. Data from the global and Baikal regional earthquake catalogues are analysed with the application of the specially designed geographic information system (GIS) in order to establish parameters and mechanisms of seismicity migration in space and time. We study the migration of seismic events in the following geostructural systems: the Baikal rift zone (BRZ), the area between BRZ and the Indo-Eurasian interplate collision zone, the area between BRZ and the West-Pacific seismic foci Benoiff zone, and two segments of the Middle Atlantic ridge.As evidenced by the obtained results, studying regimes of seismic migration provides for analyses of space-time distribution of seismic energy in the fault-block structure of the lithosphere and facilitates more detailed studies of the origin of deformation waves and mechanisms of the seismotectonic regime of the Earth. Forward (from the equator) and backward (towards the equator) migration of seismic events are established in all the regions under study. It is assumed that this phenomenon may result from regular changes of the polar compression of the Earth due to variations of its rotation regime. Besides, it is revealed that energy clusters of migration are regularly generated, and the regularity may be related to the 11-year cycle of the solar activity which impacts the seismic regime. We discuss the need to study the interference of wave deformations in the lithosphere which are initiated by several external energy sources. It is proposed to consider the regimes of planetary seismicity migration as a reflection of redistribution of endogenic (primarily heat) energy of the Earth during the destruction of its lithospheric shell under the impacts of cosmogenic factors via triggering mechansms. With reference to our positive experiences of applying the proposed concept to BRZ, we consider possibilities of using the seismicity migration data for prediction of earthquakes in the planetary and regional scales.Изучение процессов сейсмомиграции проводилось новым методом построения пространственно-временных диаграмм и посредством сочетания кластерного и регрессионного анализа. С помощью разработанной геоинформационной системы (ГИС) и с использованием всемирного и байкальского регионального каталогов землетрясений решались задачи по выяснению параметров и механизмов пространственно-временной миграции сейсмической активности. Сейсмомиграционные явления изучались в следующих геоструктурных системах: в пределах Байкальской рифтовой зоны (БРЗ), между БРЗ и областью Индо-Евразийской межплитной коллизии, между БРЗ и Западно-Тихоокеанской сейсмофокальной зоной Беньофа, а также в двух сегментах Срединно-Атлантического хребта.На основе анализа полученных результатов показано, что изучение режимов сейсмомиграций позволяет анализировать пространственно-временное перераспределение сейсмической энергии в разломно-блоковой структуре литосферы и, соответственно, более углубленно изучать деформационно-волновую природу и механизмы формирования сейсмотектонического режима Земли. Установлено проявление прямых (от экватора) и обратных (к экватору) сейсмомиграций для всех рассмотренных районов. Предполагается, что такое явление может быть объяснено периодическим изменением полярного сжатия Земли за счет вариаций ее ротационного режима. Выявлена также периодичность в режиме генерации энергетических кластеров миграции, что может быть связано с влиянием на сейсмический режим 11-летнего цикла солнечной активности. Обсуждается необходимость изучения интерференции волновых деформаций в литосфере, возбужденных несколькими внешними энергетическими источниками. С этих позиций режимы планетарной сейсмомиграции предлагается рассматривать как отражение перераспределения эндогенной, преимущественно тепловой, энергии нашей планеты в ходе деструкции ее литосферной оболочки под воздействием космогенных факторов через триггерные механизмы. На основе положительного опыта для БРЗ обсуждаются возможности применения полученных сведений о сейсмомиграции для прогноза землетрясений в планетарном и региональном масштабе

    Biodigital publics: personal genomes as digital media artifacts

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    The recent proliferation of personal genomics and direct-to-consumer (DTC) genomics has attracted much attention and publicity. Concern around these developments has mainly focused on issues of biomedical regulation and hinged on questions of how people understand genomic information as biomedical and what meaning they make of it. However, this publicity amplifies genome sequences which are also made as internet texts and, as such, they generate new reading publics. The practices around the generation, circulation and reading of genome scans do not just raise questions about biomedical regulation, they also provide the focus for an exploration of how contemporary public participation in genomics works. These issues around the public features of DTC genomic testing can be pursued through a close examination of the modes of one of the best known providers—23andMe. In fact, genome sequences circulate as digital artefacts and, hence, people are addressed by them. They are read as texts, annotated and written about in browsers, blogs and wikis. This activity also yields content for media coverage which addresses an indefinite public in line with Michael Warner’s conceptualisation of publics. Digital genomic texts promise empowerment, personalisation and community, but this promise may obscure the compliance and proscription associated with these forms. The kinds of interaction here can be compared to those analysed by Andrew Barry. Direct-to-consumer genetics companies are part of a network providing an infrastructure for genomic reading publics and this network can be mapped and examined to demonstrate the ways in which this formation both exacerbates inequalities and offers possibilities for participation in biodigital culture

    Phase formation processes and synthesis of solid solutions in Ca-R-Nb-M-O systems

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    During the study of the phase formation process in Ca-R-Nb-M-O systems (R=La, Bi, M=Mo, W), an attempt was made to obtain single-phase compounds of CaRNbMO8 composition by the standard ceramic technique. In addition, samples based on LaNbO4, CaWO4, BiNbO4 were also synthesized by the standard ceramic technique. The phase composition of the samples was studied by XRD analysis. The electrical conductivity of the obtained solid solutions and potential composite materials was investigated by impedance spectroscopy

    Modelling of large-scale structures arising under developed turbulent convection in a horizontal fluid layer (with application to the problem of tropical cyclone origination)

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    International audienceThe work is concerned with the results of theoretical and laboratory modelling the processes of the large-scale structure generation under turbulent convection in the rotating-plane horizontal layer of an incompressible fluid with unstable stratification. The theoretical model describes three alternative ways of creating unstable stratification: a layer heating from below, a volumetric heating of a fluid with internal heat sources and combination of both factors. The analysis of the model equations show that under conditions of high intensity of the small-scale convection and low level of heat loss through the horizontal layer boundaries a long wave instability may arise. The condition for the existence of an instability and criterion identifying the threshold of its initiation have been determined. The principle of action of the discovered instability mechanism has been described. Theoretical predictions have been verified by a series of experiments on a laboratory model. The horizontal dimensions of the experimentally-obtained long-lived vortices are 4÷6 times larger than the thickness of the fluid layer. This work presents a description of the laboratory setup and experimental procedure. From the geophysical viewpoint the examined mechanism of the long wave instability is supposed to be adequate to allow a description of the initial step in the evolution of such large-scale vortices as tropical cyclones - a transition form the small-scale cumulus clouds to the state of the atmosphere involving cloud clusters (the stage of initial tropical perturbation)

    Educational Migration Bridge: From Metaphor to Project

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    The purpose of the article is to analyze the topical problem of educational migration and ways to solve it. The article identifies factors preventing from successful adaptation and socialization of foreign students in recipient country as legal, pedagogical, psychological, lingvo-communicative are identified. Minimization of negative factors actualized the integrated strategy of educational migration «bridge construction» development aimed at solving tasks of migrants’ integration in Russian labour market, providing them with all-round support in getting education, improving professional qualification, adaptation and socialization. The term «bridge» is metaphorically used as an artificial, virtual «construction» functioning as a means for educational migration support of citizens.The experience of the Orenburg State University in development and realization of the longterm integrated strategy of educational migration «bridge construction» presented within the Strategic Academic Leadership Program «Priority 2030» is studied. Regarding the potential of the University and Orenburg region the ways of educational migration «bridge construction» are determined: introduction of educational migration interactions into mission and policy of the university; development of open university migration interactions network structures; implementation of educational migration interaction based on norms, values and ideals of person’s lingvo-communicative culture. The practical steps for the strategy realization within the project «Educational migration bridge» are described: formation of the united scientific, educational and cultural environment based on mutual activity in international scientific and educational community; arrangement of universities regional consortium for informing applicants from Asian countries, for training and living in universities campuses; establishment of the Faculty of foreign students’ education and digital educational platform ensuring logistics and student educational improvement management; development and realization of module network programs for foreign students; realization of additional educational programs in OSU Linguistic center. The authors analyze the main indicators of the project effectiveness: quantitative and qualitative results of the Faculty of foreign students’ education activity in training Russian and culture; establishment of the Orenburg branch of Foreign Students Association, students’ involvement in various interaction forms and special career guidance events; scientific and methodological support for teachers. Realization of the strategy implies creation in OSU in the nearest future a specific environment including social infrastructure for foreigners

    Sceptical Employees as CSR Ambassadors in Times of Financial Uncertainty

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    This chapter offers new insights into the understanding of internal (employee) perceptions of organizational corporate social responsibility (CSR) policies and strategies. This study explores the significance of employees’ involvement and scepticism upon CSR initiatives and focuses on the effects it may have upon word of mouth (WOM) and the development of employee–organisation relationships. Desk research introduces the research questions. Data for the research questions were gathered through a self-completion questionnaire distributed in a hardcopy form to the sample. An individual’s level of scepticism and involvement appears to affect the development of a positive effect on employees’ WOM. Involvement with the domain of the investment may be a central factor affecting relationship building within the organization, and upon generation of positive WOM. The chapter offers a conceptual framework to public relations (PR) and corporate communications practitioners, which may enrich their views and understanding of the use and value of CSR for communication strategies and practices. For-profit organisations are major institutions in today’s society. CSR is proffered as presenting advantages for (at macro level) society and (micro level) the organization and its employees. Concepts, such as involvement and scepticism, which have not been rigorously examined in PR and corporate communication literature, are addressed. By examining employee perceptions, managers and academic researchers gain insights into the acceptance, appreciation and effectiveness of CSR policies and activities upon the employee stakeholder group. This will affect current and future CSR communication strategies. The knowledge acquired from this chapter may be transferable outside the for-profit sector

    Self-organization without conservation: Are neuronal avalanches generically critical?

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    Recent experiments on cortical neural networks have revealed the existence of well-defined avalanches of electrical activity. Such avalanches have been claimed to be generically scale-invariant -- i.e. power-law distributed -- with many exciting implications in Neuroscience. Recently, a self-organized model has been proposed by Levina, Herrmann and Geisel to justify such an empirical finding. Given that (i) neural dynamics is dissipative and (ii) there is a loading mechanism "charging" progressively the background synaptic strength, this model/dynamics is very similar in spirit to forest-fire and earthquake models, archetypical examples of non-conserving self-organization, which have been recently shown to lack true criticality. Here we show that cortical neural networks obeying (i) and (ii) are not generically critical; unless parameters are fine tuned, their dynamics is either sub- or super-critical, even if the pseudo-critical region is relatively broad. This conclusion seems to be in agreement with the most recent experimental observations. The main implication of our work is that, if future experimental research on cortical networks were to support that truly critical avalanches are the norm and not the exception, then one should look for more elaborate (adaptive/evolutionary) explanations, beyond simple self-organization, to account for this.Comment: 28 pages, 11 figures, regular pape
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