Neural Dynamics Indicate Parallel Integration of Environmental and Self-Motion Information by Place and Grid Cells

Place cells and grid cells in the hippocampal formation are thought to integrate sensory and self-motion information into a representation of estimated spatial location, but the precise mechanism is unknown. We simulated a parallel attractor system in which place cells form an attractor network driven by environmental inputs and grid cells form an attractor network performing path integration driven by self-motion, with inter-connections between them allowing both types of input to influence firing in both ensembles. We show that such a system is needed to explain the spatial patterns and temporal dynamics of place cell firing when rats run on a linear track in which the familiar correspondence between environmental and self-motion inputs is changed. In contrast, the alternative architecture of a single recurrent network of place cells (performing path integration and receiving environmental inputs) cannot reproduce the place cell firing dynamics. These results support the hypothesis that grid and place cells provide two different but complementary attractor representations (based on self-motion and environmental sensory inputs, respectively). Our results also indicate the specific neural mechanism and main predictors of hippocampal map realignment and make predictions for future studies

Finite lifetime eigenfunctions of coupled systems of harmonic oscillators

We find a Hermite-type basis for which the eigenvalue problem associated to the operator $H_{A,B}:=B(-\partial_x^2)+Ax^2$ acting on $L^2({\bf R};{\bf C}^2)$ becomes a three-terms recurrence. Here $A$ and $B$ are two constant positive definite matrices with no other restriction. Our main result provides an explicit characterization of the eigenvectors of $H_{A,B}$ that lie in the span of the first four elements of this basis when $AB\not= BA$.Comment: 11 pages, 1 figure. Some typos where corrected in this new versio

THE MECHANISM OF THE CURRENT INVESTMENT PLANNING IN THE MANAGING OF THE ECONOMIC SECURITY OF AN ENTERPRISE

This paper is focused on investment planning in the enterprise economic security management. The actuality of the research is determined by the need for the identification and usage of the adaptation enterprise system in Russia in the current circumstances of the domestic problems and changes in the world economic relations. In work was formed the mechanism of realization the current investing planning (CIP). Besides, authors have highlighted the stages that provide factors of economic security of an enterprise in a short- and medium-term perspective. The research aim is in the development of the mechanism of the practical realization of the current investment planning on the base of its logical structure and the investment program of the business entity. The methodological base of the research was: the dialectical materialistic method, the method of the unity of logical and historical, the methods of the induction and deduction, analytical groups and also such scientific methods as the analysis and synthesis, the logic, the graphic method of the information interpretation

ADOPTION AND IMPLEMENTATION OF STANDARDS DECENT WORK AS AN INSTRUMENT OF INCREASING THE ROLE OF PRICES AND LABOUR

The article deals with the process of social and labor relations management through the use of new forms of regulation rules and regulations in the field of labor and employment. The article includes the results of the survey of employers, which helped build a picture of the current social partnership in the territory of the Ulyanovsk region. And the analysis of the implementation of standards of decent work in the region has allowed companies to develop proposals for improving the mechanism of its implementation at the municipal and regional level

ADOPTION AND IMPLEMENTATION OF STANDARDS DECENT WORK AS AN INSTRUMENT OF INCREASING THE ROLE OF PRICES AND LABOUR

The article deals with the process of social and labor relations management through the use of new forms of regulation rules and regulations in the field of labor and employment. The article includes the results of the survey of employers, which helped build a picture of the current social partnership in the territory of the Ulyanovsk region. And the analysis of the implementation of standards of decent work in the region has allowed companies to develop proposals for improving the mechanism of its implementation at the municipal and regional level

Earnings announcement promotions: a Yahoo Finance field experiment

This study presents a field experiment in which media articles for a random sample of firms with earnings announcements are promoted to a one percent subset of Yahoo Finance users. Promoted firms have higher abnormal returns and some evidence of lower bid-ask spreads on the day of the earnings announcement. These results are more pronounced for less visible firms, negative earnings news, and on days with fewer promoted firms. These findings suggest that investor attention affects the pricing of earnings and that retail investors buy stocks that catch their attention, in a setting where attention is randomly assigned

EVALUATION OF MOTIVATION CONDITIONS FOR REPRODUCTION OF LABOR RESOURCES AND SOCIAL-LABOR RELATIONS IN AGRICULTURE (ON THE EXAMPLE OF THE ULYANOVSK REGION)

The article assesses the motivational conditions for the reproduction of labor resources and social and labor relations in agriculture in the Ulyanovsk region. Reproduction of labor resources is considered. The demographic situation in the region is analyzed. Factors affecting the population size are given. The ways of solving the problem of labor shortage are shown. Internal migration and attracting the working-age population from outside are considered. The number of unemployed registered in the state institutions of the employment service of the Ulyanovsk region is shown and analyzed. The quality of life of the rural population and the development of social infrastructure in the region have been analyzed. The basic directions of an exit from the developed situation are given

Диагностика и лечение гнойно-некротических деструкций легких

The impotence and results of different programs for treatment of acute necrotic-purulent lung destructions were studied. The bacteriological analysis of abscess’s punctures revealed nonsporeforming anaerobic organisms in 100% of all cases (54 patients). Diagnostic criteria determining clinical forms and courses of diseases w ere elaborated. The effective methods of bronchial drainage and substitution therapy were suggested for each form of lung destructions. In case of giant cavities (20 patients) organ-preserving operations were worked out instead of lung resections. Secondary bronchiectasis may precede lung purulent destructions and that fact must be taken into account when determining the volume of resection. The suggested methods of diagnosis and treatment of lung destructions allow to decrease the mortality (6.7%) and chronisation of diseases (3.8%).Изучена информативность диагностики и результаты дифференцированного лечения у 800 больных с острыми гнойно-некротическими деструкциями легких. В пунктате из формирующегося абсцесса у 54 обследованных (100%) обнаружены неспорообразующие анаэробы. Определены основные диагностические критерии, раскрывающие сущность гнойно-некротических процессов. Они использованы для выделения клинических форм и вариантов течения. Для каждого варианта течения гнойно-некротических деструкций предложены эффективные методы улучшения бронхиального дренажа, определен объем заместительной терапии. При гигантских остаточных полостях (20 бальных) вместо резекций легких разработана органощадящая операция. Установлено, что возникновению хронической гнойной деструкции легких предшествует развитие вторичных бронхоэкгазов, наличие которых следует учитывать при определении объема резекции легкого. Оптимизация методов диагностики и лечения позволила достоверноснизить летальность на 6,7%, а переход в хроническую гнойную деструкцию – на 3,8%