The influence of blue-green algae on development of the zooplankton. [Translation of: Byull.mosk.Obshch.Ispyt.Prir.(Biol.) 67, 128-131, 1962]

Many have observed the reduction of the quantity of zooplankton in the presence of water blooms. It is known that in seas zooplankton as it were avoids places of accumulation of blue-green algae. By observations on one of the tributaries of the Rybinsk reservoir - the River Shumorovka - the authors tried by simultaneous collections to trace the changes in numbers, not only of zoo- and phytoplankton but also of bacteria. The plankton was collected by quantitative nets with suitable numbers of gauze and bacteria were taken account of by the method of direct calculation on membrane filters. It can be seen that the development of blue-green algae appears as an important factor, determining not only the intensity but also the direction of the process of production of zooplankton

Impact of step size on convergence in swarmalator systems

openGroup robotics is one of the key areas of the development of robotic systems. This is due to the fact that for a wide class of practical tasks, the use of a group of relatively simple robots is much more efficient than using a single large multi-purpose device. The modern development of computer technology and communication systems opens up wide opportunities for the construction of such systems. The most progressive and effective approach is the implementation of the collective behavior of robots according to the swarm principle, when each of them interacts only with neighboring individuals, synchronously exchanging the collected information about the environment and their condition. Such a group compensates for the weakness of its detection and communication devices by joining a team. The problems of introducing group robotics into the modern world are studied in this thesis. If they combine two concepts, synchronization and swarming, they are called a swarmalator. In swarmalator systems, the movement of the robots is governed by differential equations. These equations are solved with the Euler method, where the location and phase are determined. The Euler method is time-discrete and allows the integration of first-order differential equations. Therefore, there is a step size to be chosen. The main task is to study group movement, which is based on transmitting information with a definite step size. The step value affects how often the swarmalators share their location and phase. Three main conclusions are made. The first research is what happens when varying the step size - is it most optimal to use with small step sizes? The second conclusion is that when increasing the step size with a small increment or using randomization of the step size. Such methods are typically, more optimal to use with a gradual increase in the step size because the convergence time is lower. The third is when decreasing the step size using a small increment. The results showed that this method is optimal to use when the step size exceeds 1. The states converge at a rather large interval, compared with previous results, but at the same time with a large value of the convergence time. The values of optimal step sizes are presented and analyzed. As performance criteria, we consider the computational power that is required, the average convergence time, the coupling probability and the step size. The behavior of all parameters is graphically represented in plots. The conclusions are based on the simulations done for the results.Group robotics is one of the key areas of the development of robotic systems. This is due to the fact that for a wide class of practical tasks, the use of a group of relatively simple robots is much more efficient than using a single large multi-purpose device. The modern development of computer technology and communication systems opens up wide opportunities for the construction of such systems. The most progressive and effective approach is the implementation of the collective behavior of robots according to the swarm principle, when each of them interacts only with neighboring individuals, synchronously exchanging the collected information about the environment and their condition. Such a group compensates for the weakness of its detection and communication devices by joining a team. The problems of introducing group robotics into the modern world are studied in this thesis. If they combine two concepts, synchronization and swarming, they are called a swarmalator. In swarmalator systems, the movement of the robots is governed by differential equations. These equations are solved with the Euler method, where the location and phase are determined. The Euler method is time-discrete and allows the integration of first-order differential equations. Therefore, there is a step size to be chosen. The main task is to study group movement, which is based on transmitting information with a definite step size. The step value affects how often the swarmalators share their location and phase. Three main conclusions are made. The first research is what happens when varying the step size - is it most optimal to use with small step sizes? The second conclusion is that when increasing the step size with a small increment or using randomization of the step size. Such methods are typically, more optimal to use with a gradual increase in the step size because the convergence time is lower. The third is when decreasing the step size using a small increment. The results showed that this method is optimal to use when the step size exceeds 1. The states converge at a rather large interval, compared with previous results, but at the same time with a large value of the convergence time. The values of optimal step sizes are presented and analyzed. As performance criteria, we consider the computational power that is required, the average convergence time, the coupling probability and the step size. The behavior of all parameters is graphically represented in plots. The conclusions are based on the simulations done for the results

A Case Study: What is Better for His Future?

This case describes the implementation of inclusive education within a mainstream secondary school on the example of the experience of a student with a cognitive developmental delay, whose special educational needs limit his academic participation and socialization in a school learning environment. The policy initiative is administered by the school principal who needs to make a decision about the best option in addressing the situation. This case narrative both highlights the complexity of the policy execution, the challenges the school principal encounters when designing actions in ensuring student’s participation; and reflects ethical issues involved in the provision of special educational services. While there are no straightforward solutions to meeting all students’ diverse needs, this case provides helpful lessons for educational leaders working in accommodating students with special educational needs. Keywords: inclusion, leadership, mainstream school, special school, student development..

A Comparative Study of Human Health Impacts Due to Heavy Metal Emissions from a Conventional Lignite Coal-Fired Electricity Generation Station, with Post-Combustion, and Oxy- Fuel Combustion Capture Technologies

Carbon dioxide capture has become an important component for ensuring reduction of greenhouse gases in the atmosphere. Even though emission reduction technologies such as electrostatic precipitators (ESP) and flue gas desulfurization (FGD) are in place at most electricity-generating stations today, the large point source emitters of carbon dioxide (CO2) and other emissions, such as heavy metals, to the atmosphere are still fossil fuel electricity-generating stations. When CO2 capture is employed, these emissions can be further reduced. However, despite its important ability to reduce atmospheric emissions, the CO2 capture technology in fact still releases some emissions through its stacks into the air. Since the safety and stability of the CO2 capture technology are fundamental considerations for widespread social acceptance, the potential liability associated with the capture technology is cited as an important barrier to successful CO2 capture implementation. Liability of the technology is further clouded by a failure to clearly define what is at risk, especially regarding human health and safety. This research study will focus on investigating the risks associated with human health and safety resulting from the different versions of the technology including: (i) no capture system, (ii) post-combustion, and (iii) oxy-fuel combustion CO2 capture technology at the Boundary Dam Power Station (BDPS) in Estevan, Saskatchewan, Canada. The research objective of this study was to evaluate the risk to human health associated with the BDPS in Estevan, Saskatchewan, Canada, using the American Meteorological Society’s Environmental Protection Agency Regulatory Model (AERMOD) and cancer and non-cancer risk equations. This research presents the air dispersion modeling of the conventional lignite-fired electricity generation station at the BDPS, the inclusion of post-combustion CO2 capture technology, and the oxy-fuel carbon dioxide capture process. The heavy metals were measured near the power plant located in Estevan, Saskatchewan. This study shows that the emissions from the three stacks posed cancer risks of less than one chance in a million (1 × 10−6). There were only two emissions from the “no capture” scenario that caused inhalation cancer risks of more than 1 × 10−6. In terms of non-cancer risks, the pollutant’s concentration from the three stacks was unlikely to cause any non-cancer health effects

SOCIO-PSYCHOLOGICAL CHARACTERISTICS OF A MODERN TEACHER IN THE DIGITAL AGE

The article focuses on a teacher undergoing a transformation in the digital age. The authors considered the main socio-psychological characteristics of a modern teacher, conducted an empirical research and supplemented the professionogram of a modern teacher. The program of teachers’ professional development proposed by the authors is based on the idea of system-activity and anthropological approaches

Эффективность функционирования торгового предприятия как основа формирования его конкурентоспособности

У статті проаналізовано взаємозв’язок між категоріями «ефективність функціонування підприємства» і «конкурентоспроможність підприємства». Виділено чинники, які на них впливають. Визначено основні положення, які необхідно враховувати при оцінці конкурентоспроможності підприємства.The interrelation between categories «efficiency of functioning of the enterprise» and «competitiveness of the enterprise» is investigated in the article. Factors which influence these economic categories are allocated. The basic provisions which must be taken into account at the estimation of competitiveness of enterprise are defined.В статье проанализирована взаимосвязь между категориями «эффективность функционирования предприятия» и «конкурентоспособность предприятия». Выделены факторы, которые на них влияют. Определены основные положения, которые необходимо учитывать при оценке конкурентоспособности предприятия