Two-dimensional von Neumann--Wigner potentials with a multiple positive eigenvalue

International audienceBy the Moutard transformation method we construct two-dimensional Schrodinger operators with real smooth potential decaying at infinity and with a multiple positive eigenvalue. These potentials are rational functions of spatial variables and their sines and cosines

APPLICATION OF KAHOOT! IN EDUCATION GAMIFICATION

Современный уровень развития общества диктует новые требования к организации образования. Одним из актуальных направлений развития образования является геймификация образования, которая позволяет добиться высокой мотивации и вовлеченности студентов в образовательный процесс.Целью работы является проверка гипотезы о том, что использование игровых моментов в обучении, основанных на активном применении информационных технологий, в частности интернет-ресурса Kahoot!, повышает вовлеченность студента в образовательный процесс, его мотивацию при обучении, формирует комфортную среду, вызывающую интерес к изучению предметной области.Новизна исследований состоит в методической организации процесса обучения, в рамках которого выполняется текущий контроль усвоения материала, тем самым реализуя активные методы обучения. При реализации предлагаемого подхода использовалось интернет-ресурс Kahoot!, предоставляющий возможности активизации внимания и контроля усвоения материала студентами.Представленные в статье результаты подтверждают эффективность предложенного подхода и использования в его рамках Kahoot!, который позволил сформировать интерактивную электронную образовательную среду.The modern level of society development sets higher requirements for education. One of the most important trends in the development of education nowadays is the gamifacation, which allows to achieve high motivation and involvement of students into the educational process.The aim of the work is to test the hypothesis that the use of gaming moments in education, involving information technology, in particular the Internet-resource Kahoot!, increases the student’s involvement into the educational process, raise one’s motivation, and creates a comfortable educational environment that causes interest in subject learning.The novelty of the research consists in the methodological organization of the learning process, within which the current control is carried out, thereby realizing active teaching methods. When implementing the proposed approach the Internet-resource Kahoot! was used. It provides opportunities for activating attention of the students and controlling the learning progress.The results presented in the article confirm the effectiveness of the proposed approach and the use within its framework of Kahoot!, which allowed to create an interactive electronic educational environment

CALIBRATION OF THE NONLOCAL DYNAMIC DEFORMATION MODEL OF A FLEXURAL BEAM BASED ON NUMERICAL EXPERIMENT RESULTS

In this paper, the problem of numerical modeling of the dynamic behavior of bending beams made of the materials with a developed internal structure is considered. The simulation is performed taking into account the non-local elastic properties of the material in time. According to the principals of nonlocal mechanics, it is assumed that elastic forces in a structure depend on the entire history of its deformation, and not only on the instantaneous deformed state. The proposed dynamic deformation model is proposed as an alternative to detailed three-dimensional models. The nonlocal dynamic deformation model is integrated into the algorithm of the FEA method to make it applicable to solving applied engineering problems. The numerical implementation of the model is performed in Python. A technique for selecting the scale parameter of a non-local model based on experimental data using the least squares method and the dichotomy method has also been developed and implemented. To identify the possibility of extrapolation of the scale parameter values determined according to the developed methodology, a series of numerical experiments were conducted, on the basis of which scale parameters for beams of different lengths were obtained and the stability of the nonlocal model was evaluated

Monitoring the Activity of Industrial Facilities Using Satellite Images of the Heat IR Range

The results of the development and testing of the methodology for automated processing of satellite images of medium spatial resolution in the heat and short-wave IR range are presented. For the specified test areas, digital maps of the Earth’s surface temperature were obtained for the territories where oil refineries and chemical plants are concentrated. A comparative analysis of the results of automated recognition of heat radiation sources showed a fairly high degree of correlation between the results of processing images of the heat IR range and the results of processing images of the short-wave IR range. We also compared the results of automated recognition of heat radiation sources based on images of the same territory taken from different satellites at different times. The results of testing the proposed methodology confirmed the possibility and high efficiency of using night images from the Terra satellite (ASTER survey instrument) and from the Landsat-8 satellite (TIRS survey instrument) to monitor the production activity of large industrial facilities that are sources of heat radiation. #CSOC1120 © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG

Prevalence, associated factors and outcomes of pressure injuries in adult intensive care unit patients: the DecubICUs study

Funder: European Society of Intensive Care Medicine; doi: http://dx.doi.org/10.13039/501100013347Funder: Flemish Society for Critical Care NursesAbstract: Purpose: Intensive care unit (ICU) patients are particularly susceptible to developing pressure injuries. Epidemiologic data is however unavailable. We aimed to provide an international picture of the extent of pressure injuries and factors associated with ICU-acquired pressure injuries in adult ICU patients. Methods: International 1-day point-prevalence study; follow-up for outcome assessment until hospital discharge (maximum 12 weeks). Factors associated with ICU-acquired pressure injury and hospital mortality were assessed by generalised linear mixed-effects regression analysis. Results: Data from 13,254 patients in 1117 ICUs (90 countries) revealed 6747 pressure injuries; 3997 (59.2%) were ICU-acquired. Overall prevalence was 26.6% (95% confidence interval [CI] 25.9–27.3). ICU-acquired prevalence was 16.2% (95% CI 15.6–16.8). Sacrum (37%) and heels (19.5%) were most affected. Factors independently associated with ICU-acquired pressure injuries were older age, male sex, being underweight, emergency surgery, higher Simplified Acute Physiology Score II, Braden score 3 days, comorbidities (chronic obstructive pulmonary disease, immunodeficiency), organ support (renal replacement, mechanical ventilation on ICU admission), and being in a low or lower-middle income-economy. Gradually increasing associations with mortality were identified for increasing severity of pressure injury: stage I (odds ratio [OR] 1.5; 95% CI 1.2–1.8), stage II (OR 1.6; 95% CI 1.4–1.9), and stage III or worse (OR 2.8; 95% CI 2.3–3.3). Conclusion: Pressure injuries are common in adult ICU patients. ICU-acquired pressure injuries are associated with mainly intrinsic factors and mortality. Optimal care standards, increased awareness, appropriate resource allocation, and further research into optimal prevention are pivotal to tackle this important patient safety threat

Correction to: Prevalence, associated factors and outcomes of pressure injuries in adult intensive care unit patients: the DecubICUs study

The original version of this article unfortunately contained a mistake

Prevalence, associated factors and outcomes of pressure injuries in adult intensive care unit patients: the DecubICUs study

Funder: European Society of Intensive Care Medicine; doi: http://dx.doi.org/10.13039/501100013347Funder: Flemish Society for Critical Care NursesAbstract: Purpose: Intensive care unit (ICU) patients are particularly susceptible to developing pressure injuries. Epidemiologic data is however unavailable. We aimed to provide an international picture of the extent of pressure injuries and factors associated with ICU-acquired pressure injuries in adult ICU patients. Methods: International 1-day point-prevalence study; follow-up for outcome assessment until hospital discharge (maximum 12 weeks). Factors associated with ICU-acquired pressure injury and hospital mortality were assessed by generalised linear mixed-effects regression analysis. Results: Data from 13,254 patients in 1117 ICUs (90 countries) revealed 6747 pressure injuries; 3997 (59.2%) were ICU-acquired. Overall prevalence was 26.6% (95% confidence interval [CI] 25.9–27.3). ICU-acquired prevalence was 16.2% (95% CI 15.6–16.8). Sacrum (37%) and heels (19.5%) were most affected. Factors independently associated with ICU-acquired pressure injuries were older age, male sex, being underweight, emergency surgery, higher Simplified Acute Physiology Score II, Braden score 3 days, comorbidities (chronic obstructive pulmonary disease, immunodeficiency), organ support (renal replacement, mechanical ventilation on ICU admission), and being in a low or lower-middle income-economy. Gradually increasing associations with mortality were identified for increasing severity of pressure injury: stage I (odds ratio [OR] 1.5; 95% CI 1.2–1.8), stage II (OR 1.6; 95% CI 1.4–1.9), and stage III or worse (OR 2.8; 95% CI 2.3–3.3). Conclusion: Pressure injuries are common in adult ICU patients. ICU-acquired pressure injuries are associated with mainly intrinsic factors and mortality. Optimal care standards, increased awareness, appropriate resource allocation, and further research into optimal prevention are pivotal to tackle this important patient safety threat

Database Strategy in Development of Digital Ecosystem for Quality Control in Education

The purpose of this research in educational environment is to improve the quality of the educational process with the help of new information technologies. The paper examines practical issues of digital ecosystems implementation in education on the basis of relational databases, as, from the authors’ point of view, in the organization data are less subject to change in time than business processes. Therefore the strategy of information systems development where the database functions as a cornerstone provides the result, that is more stable than, for example, a functional approach in software development. Within the frames of this research information technologies of quality control in education are being created. They are intended for the exact and full representation of teaching materials as a system used as a source of information for the assessment of learning and teaching materials and creation of electronic resources on this platform. The structure of the created database, operation practices and topical issues of its introduction in more large-scale digital ecosystems are considered. As a result the database ready for use as a management solution for higher education institutions is created. This is important as information technologies provide additional opportunities for the development in the sphere of higher education, quality improvement of the educational process. The authors conclude that introduction of innovative information technologies in management system of higher education institution is relevant and perspective

Double Loop Control of Linear Dynamical Systems and an Algorithm for Adjustment of the Typical Controllers Using the Nonparametric Model of a Llinear Dynamical System

Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.The paper considers the double loop control of a linear dynamic system based on a nonparametric model. The process of constructing a controller is presented. At the first stage, the nonparametric model of a macro-object is constructed. At the second stage, a nonparametric controller is constructed. The double loop control scheme preserves analogue devices of local automatic equipment to ensure reliability even in the case of a failure of digital devices. It is proposed an approach to the synthesis of a nonparametric controller for a linear dynamic system of an unknown order when information about a control object is presented in the form of realization of transition functions containing disturbance. The algorithm for the realization of the inverse function for a linear dynamic system is given. An original approach to standard controller parameters adjustment using a nonparametric model of a linear dynamical system is proposed