In this paper, we propose and analyze a fractional prey–predator model with generalized Hattaf fractional (GHF) derivative. We prove that our proposed model is ecologically and mathematically well-posed. Furthermore, we show that our model has three equilibrium points. Finally, we establish the stability of these equilibria.
Розглянуто системний підхід до визначення консолідованої інформації для ефективного управління екологічною безпекою міста. Запропоновано використання системи цілей управління екобезпекою міста та їхнього системного аналізу. Визначено консолідовану інформацію для управління екобезпекою міста, структуру управлінських дій та їхніх можливих виконавців.
Розглянуто проблему побутових відходів та засади національного регулювання поводження з відходами. Проаналізовано системи роздільного управління відходами.
The problem of waste and the principles of national regulation of radioactive waste.
Analyzed the system of separate waste management.
Розглянуто проблеми екологічної безпеки міста як складової безпеки життєдіяльності міста. Проаналізовано причин виникнення небезпек і можливі варіанти їх ліквідації за допомогою управлінських дій. Запропоновано концептуальну схему управління міською екобезпекою і структуру управлінського органу, алгоритм управління екобезпекою.
Запропоновано рекомендації щодо моделювання гідродинамічних потоків в озерних екосистемах з урахуванням відновлювальних процесів.
The recommendation for the modelling of hydrodynamic streams in lacustrine ecological systems taking into account restoration processes are offered.
The article describes the current problems of international environmental security in the context of the systematic manifestation of the principles of its implementation, which justifies the need to consolidate the efforts of interstate environmental measures on the basis of sustainable and balanced development. The article examines prerequisites for the formation of the global environmental safety as an integral part of international relations and politics against the background of the long-term ecological crisis.
The aim of this study was to identify invasive aquatic species and assess ecological factors in 5 islands, namely Mipongo, Japon, Kabongo, Kingabwa and Molondo.of the Pool Malebo. A floristic inventory was conducted around these sites and physico-chemical characteristics were measured in each island between 8:00am and 3:00pm using an appropriate electronic probe. The floristic affinity between sites was determined by cluster analysis using MVSP software version 4.03, after highlighting the Jaccard's coefficient based on the presence/absence of species in the different collection sites.
The Allee effect is an important phenomena in the context of ecology characterized by a correlation between population density and the mean individual fitness of a population. In this work, we examine the influences of Allee effect on the dynamics of a delayed prey–predator model with Hattaf–Yousfi functional response. We first prove that the proposed model with Allee effect is mathematically and ecologically well-posed. Moreover, we study the stability of equilibriums and discuss the local existence of Hopf bifurcation.
The article identifies and analyzes international standards for the formation of environmental responsibilities of man and citizen, in particular the preconditions and conditions for their formation, the main stages of their development and features of consolidation at the legislative level. It was found that the institution of environmental responsibilities as a holistic entity is characterized by unity of content, which is expressed in general provisions, legal principles or a set of legal concepts used, the unity of the legal regime of regulated social relations.
The article explores the coverage of topics of ecology in the news programs of Ukrainian television. Based on the study of news releases on the all-Ukrainian TV channel “1+1” and the specialized TV channel “ECO TV”, it emphasizes the importance of media discourse for the promotion of ecological knowledge in order to form a general environmental culture, environmental awareness and pro-ecological behavior. In general, there is a segment of scientific content in the modern Ukrainian environmental discourse, but its volume is insignificant compared to entertainment.