regular type
Recently Published Documents


TOTAL DOCUMENTS

89
(FIVE YEARS 22)

H-INDEX

12
(FIVE YEARS 1)

Author(s):  
Tetiana Kovalchuk ◽  
Inna Didenko

Aim. The National Dendrological Park "Sofiyivka" of the National Academy of Sciences of Ukraine is an example of the tandem of nature and human creativity, where a significant place in the formation of landscapes belongs to floral design. It is one of the most colorful architectural and artistic elements of landscaping. The aim is to describe and to define the main features of flower beds of the Dendrological Park “Sofiyivka”, and to describe the range of annual plants used in flower arrangements. Methods. The study was conducted in the dendrological park during 2019-2021. Examples of flower design have been described according to the classification of flower beds by V. V. Pushkar. Latin names of plant species were given according to “The Plant List, 2013”. Results. The analysis of flower design in the dendrological park  “Sofiyivka” using annual plants was carried out. The features of flower beds are clarified by: shape and location, duration of their existence, flowering period, location of plants in the vertical plane and the type of plant combination. Conclusions. Five exhibition areas in “Sofiyivka” park have been defined. They are decorated with 12 flower compositions. This floral design belongs to the landscape and regular type of planning.


Discourse ◽  
2021 ◽  
Vol 7 (6) ◽  
pp. 83-96
Author(s):  
V. Kh. Thakahov

Introduction. The article analyzes the place, role and functions of the concept of a small homeland in the construction of civil identity. The starting point of the study is the understanding of a small homeland as a set of ideas and practices of the belonging of individuals and groups to the space of the place of birth, origin and primary socialization. A small homeland is what emotionally and practically unites citizens in their loyal affection to the place – physical and symbolic.Methodology and sources. Based on the general concept of the space of places (A. Lefebvre, M. Castells, T. Cresswell, M. Auger); P. Shtompka's theory of cultural trauma and A.O. Boronoev's ideas of structural schematization of a small homeland, it is originally presented a sociological analysis of the problem of the loss of a small homeland as a result of forced relocations (the case of flooded areas). As relevant sources the author use the documents and memoirs on the phenomenon of the loss of a small homeland; also on memories of eyewitnesses, and on artistic reflection of farewell to the place of birth. The purpose of the study is to identify the role of the loss of a small homeland in the functioning and reproduction of the civic identity of the place.Results and discussion. As a result of the study it has been shown that the loss of a small homeland determines: a) the rupture of social and cultural ties; b) the emergence of grassroots self-organization of Mologzhan activists who are re-constructing civic urban identity; c) production of commemorative practices of a regular type (cases of Mologa and Circassian auls); d) active formation of cultural discourse in which the small homeland of the place is positioned as a subjective value and one of the foundations of the life world.Conclusion. A small homeland as a representation and social practice in the space of civic identity ensures through its agents the reproduction of social interaction (real or imaginary) with a place and the maintenance of socio-cultural ties with it within the natural and cultural landscape of communities. It also promotes recognition, confirmation of the identity of the place. The loss of a small homeland (physical and symbolic) gives rise to various social practices of memory, rebirth and oblivion.


Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8121
Author(s):  
Maria Torres-Falcon ◽  
Omar Rodríguez-Abreo ◽  
Francisco Antonio Castillo-Velásquez ◽  
Alejandro Flores-Rangel ◽  
Juvenal Rodríguez-Reséndiz ◽  
...  

In Mexico and many parts of the world, land cargo transport units (UTTC) operate at high speeds, causing accidents, increased fuel costs, and high levels of polluting emissions in the atmosphere. The speed in road driving, by the carriers, has been a factor little studied; however, it causes serious damage. This problem is reflected in accidents, road damage, low efficiency in the life of the engine and tires, low fuel efficiency, and high polluting emissions, among others. The official Mexican standard NOM-012-SCT-2-2017 on the weight and maximum dimensions with which motor transport vehicles can circulate, which travel through the general communication routes of the federal jurisdiction, establishes the speed limit at the one to be driven by an operator. Because of the new reality, the uses and customs of truck operators have been affected, mainly in their operating expenses. In this work, a mathematical model is presented with which the optimum driving speed of a UTTC is obtained. The speed is obtained employing the equality between the forces required to move the motor unit and the force that the tractor has available. The required forces considered are the force on the slope, the aerodynamic force, and the friction force, and the force available was considered the engine torque. This mathematical method was tested in seven routes in Mexico, obtaining significant savings of fuel above 10%. However, the best performance route possesses 65% flat terrain and 35% hillocks without mountainous terrain, regular type of highway, and a load of 20,000 kg, where the savings increase up to 16.44%.


Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 543
Author(s):  
Shuo Guo ◽  
Andrey Vladimirovich Karasev ◽  
Anders Tilliander ◽  
Pär Göran Jönsson

The characteristics of elongated MnS have a critical effect on fatigue anisotropy and all mechanical anisotropies. A comparative investigation of nonmetallic inclusions in both stainless steels and tool steels has been carried out in this study. The inclusion characteristics were investigated using electrolytic extraction (EE) followed by scanning electron microscopy combined with energy-dispersive spectroscopy (SEM-EDS). Overall, three types of MnS inclusions (type I (regular), type II (irregular) and type III (Rod)) were found in tool steels in as-cast samples, which had not been heat-treated. Furthermore, three types of MnS inclusions (Rod-like sulfide (RS), Plate-like sulfide (PS) and Oxysulfide (OS)) were found in samples taken after rolling. Based on the breakability of the elongated MnS, three types of inclusions, Type UU, UB and BB, where U represents the undamaged or unbroken edge of an inclusion and B represents the fragment or broken edge of an inclusion, were studied in both stainless steels and tool steels both before and after additional heat treatment. The effect of heat treatment and dissolving the metal layer during the EE process is also discussed. The results show that both processes have a limited effect on the breakability of inclusions in steels with carbon contents <0.42 mass%.


Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1526
Author(s):  
Shun Sakamoto ◽  
Masaki Itatani ◽  
Kanta Tsukada ◽  
Hideki Nabika

The Liesegang phenomenon can be used for micro- and nanofabrication processes to yield materials with periodic precipitation of diverse types of materials. Although there have been several attempts to control the periodicity of the Liesegang patterns, it remains unclear whether the periodic precipitation of AgCl in gel medium causes regular- or revert-type patterns. To confirm the periodicity of the AgCl pattern, we conduct one-dimensional experiments under various ion concentration conditions. From microscopic observations, three different precipitation modes were observed, i.e., continuous precipitation with a sharp front, periodic precipitation and continuous precipitation with a gradual front. For these three modes, numerical analyses of the pattern geometry are performed for the periodic precipitation. It was confirmed that the regular-type pattern appeared for all concentration conditions conducted in the present experiments. Furthermore, the pattern was found to obey the spacing law and the Matalon–Packter law. From our experiments, we concluded that AgCl forms regular-type Liesegang patterns, regardless of the dimension of diffusion.


Author(s):  
Maria V. Zaitseva ◽  

A long-term, mutually interesting relationship with the public is the goal of most of the world’s museums. The author of the article suggests that a promising form of organizing museum events are programs of a regular type, formed into thematic cycles. The study explains both theoretical grounds and practical arguments emphasizing the relevance of the application of this form of events in the practice of museums. The study was based on the experience of The National Pushkin Museum, which demonstrated the possibility of multifaceted coverage of a given topic within thematic cycles, synthesizing in one event different forms of impact on the visitor. Review of cycle-type programs of two other museums – The Pushkin Museum and The State Literature Museum, confirms the conclusions that this form of organizing events contributes to the development of the cultural and educational aspect of museum activities, an increase in the number of regular visitors, an increase in the professional motivation of museum staff, and forms a favorable image of the museum, increasing its competitiveness. The prospect of cyclical events is reflected in modern trends in society towards self-education.


2021 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
Abhinav Tandon

<p style='text-indent:20px;'>In the present study, a nonlinear model is formulated to demonstrate crop - weed interactions, when they both grow together on agricultural land and compete with each other for the same resources like sunlight, water, nutrients etc., under the aegis of herbicides. The developed model is mathematically analyzed through qualitative theory of differential equations to demonstrate rich dynamical characteristics of the system, which are important to be known for maximizing crop yield. The qualitative results reveal that the system not only exhibits stability of more than one equilibrium states, but also undergoes saddle - node, transcritical and Hopf bifurcations, however, depending on parametric combinations. The results of saddle - node and transcritical bifurcations help to plan strategies for maximum crop yield by putting check over the parameters responsible for the depletion of crops due to their interaction with weeds and herbicides. Hopf - bifurcation shows bifurcation of limit cycle through Hopf - bifurcation threshold, which supports that crop - weed interactions are not always of regular type, but they can also be periodic.</p>


Author(s):  
M. N. Kirsanov

Statement of the problem. The task is to obtain in symbolic form the dependence of the deflection of the proposed scheme of a statically definable spatial truss of a regular type on the number of panels under various loads, including the load from the truss plane. A truss has two independent parameters that define its proportions.Results. For several types of loading according to the Maxwell - Mohr formula, analytical dependences of the deflections of the structure on the number of panels, load, and dimensions are derived. When generalizing a series of partial solutions with a given number of panels to an arbitrary number of panels, together with operators of the Maple computer mathematics system, the induction method is used. Asymptotic approximations of solutions are obtained.Conclusions. The proposed model of a spatial frame with two independent numbers of panels that define the proportions of the structure allows an analytical solution of the problem of deflection under different types of loading. The derived formulas can be used as test formulas for evaluating approximate numerical solutions and for optimization problems.


2020 ◽  
Vol 6 (1) ◽  
pp. 188-191
Author(s):  
V. Narasimhamurthy ◽  
L.H. Shivashankarappa

Electrodeposition of Zn-Ni alloy from non-cyanide alkaline sulphate bath containing triethanolamine (TEA) and mercaptopyridine (MPY) under optimized plating conditions such as bath pH, temperature current density and metal ion ratio in the bath produced an alloy deposit with the desired composition of 10-15 %wt. of nickel, alloy of this composition showed good adhesion, high hardness pore free, smooth, uniform and finer grained. Deposition potentials of Zn-Ni alloy lie between the potentials of individual metals. Increase in temperature density decreased the nickel content in the alloy deposit, which with increase in temperature and thickness of the alloy deposit increased nickel content in the alloy deposit. Alloy deposition followed a regular type of co-deposition.


Author(s):  
М. Н. Кирсанов

Постановка задачи. Ставится задача получить в символьном виде зависимость прогиба предлагаемой схемы статически определимой пространственной фермы регулярного типа от числа панелей при различных нагрузках, в том числе при нагрузке из плоскости фермы. Ферма имеет два независимых параметра, задающие ее пропорции. Результаты. Для нескольких видов нагружения по формуле Максвелла-Мора выведены аналитические зависимости прогибов конструкции от числа панелей, нагрузки и размеров. При обобщении серии частных решений с заданным числом панелей на произвольное число панелей совместно с операторами системы компьютерной математики Maple использован метод индукции. Получены асимптотические приближения решений. Выводы. Предложенная схема пространственной рамы с двумя независимыми числами панелей, задающими пропорции конструкции, допускает аналитическое решение задачи о прогибе при различных видах нагружения. Выведенные формулы могут быть использованы как тестовые для оценки приближенных численных решений и в задачах оптимизации. Statement of the problem. The task is to obtain in symbolic form the dependence of the deflection of the proposed scheme of a statically definable spatial truss of a regular type on the number of panels under various loads, including the load from the truss plane. A truss has two independent parameters that define its proportions. Results. For several types of loading according to the Maxwell - Mohr formula, analytical dependences of the deflections of the structure on the number of panels, load, and dimensions are derived. When generalizing a series of partial solutions with a given number of panels to an arbitrary number of panels, together with operators of the Maple computer mathematics system, the induction method is used. Asymptotic approximations of solutions are obtained. Conclusions. The proposed model of a spatial frame with two independent numbers of panels that define the proportions of the structure allows an analytical solution of the problem of deflection under different types of loading. The derived formulas can be used as test formulas for evaluating approximate numerical solutions and for optimization problems.


Sign in / Sign up

Export Citation Format

Share Document