scholarly journals ITERATIONS OF DEPENDENT RANDOM MAPS AND EXOGENEITY IN NONLINEAR DYNAMICS

2021 ◽  
pp. 1-38
Author(s):  
Zinsou Max Debaly ◽  
Lionel Truquet
Keyword(s):  
Time Series ◽  
Nonlinear Models ◽  
Functional Dependence ◽  
National Academy Of Sciences ◽  
Random Maps ◽  
Dependence Measure ◽  
Binary Choice Models ◽  
Wide Range ◽  
Categorical Time Series ◽  
Academy Of Sciences

Abstract We discuss the existence and uniqueness of stationary and ergodic nonlinear autoregressive processes when exogenous regressors are incorporated into the dynamic. To this end, we consider the convergence of the backward iterations of dependent random maps. In particular, we give a new result when the classical condition of contraction on average is replaced with a contraction in conditional expectation. Under some conditions, we also discuss the dependence properties of these processes using the functional dependence measure of Wu (2005, Proceedings of the National Academy of Sciences 102, 14150–14154) that delivers a central limit theorem giving a wide range of applications. Our results are illustrated with conditional heteroscedastic autoregressive nonlinear models, Generalized AutoRegressive Conditional Heteroskedasticity (GARCH) processes, count time series, binary choice models, and categorical time series for which we provide many extensions of existing results.

Asymptotic for LS estimators in the EV regression model for dependent errors

Filomat ◽  
2017 ◽  
Vol 31 (15) ◽  
pp. 4845-4856
Author(s):  
Konrad Furmańczyk
Keyword(s):  
Regression Model ◽  
Functional Dependence ◽  
Dependent Data ◽  
Errors In Variables ◽  
Mixing Conditions ◽  
Asymptotic Results ◽  
Dependence Measure ◽  
Wide Range ◽  
Ev Regression Model ◽  
Linear And Nonlinear

We study consistency and asymptotic normality of LS estimators in the EV (errors in variables) regression model under weak dependent errors that involve a wide range of linear and nonlinear time series. In our investigations we use a functional dependence measure of Wu [16]. Our results without mixing conditions complete the known asymptotic results for independent and dependent data obtained by Miao et al. [7]-[10].

NEW FUNCTIONAL SUBSTANCES AND MATERIALS FOR CHEMICAL ENGINEERING

2021 ◽  
Keyword(s):  
Chemical Engineering ◽  
Energy Resource ◽  
National Academy Of Sciences ◽  
Resource Saving ◽  
Internal Markets ◽  
Wide Range ◽  
New Energy ◽  
Chemical Products ◽  
National Industry ◽  
Academy Of Sciences

The most important results of the scientific studies, carried out by the Institutes of the National Academy of sciences of Ukraine in the frames of the program for scientific research of the NAS of Ukraine "New Functional Substances and Materials for Chemical Engineering" in 2017-2021, are summarized. In the result of fulfillment of the projects of the Program a number of principally new organic, inorganic, polymeric substances and materials as well as composited based thereon of various functional destination were created, new energy-, resource-saving and ecologically-friendly ways for low-tonnage obtaining of substances and materials of chemical engineering were developed. Use of the obtained materials and methods of chemical substances obtaining in different fields of the national industry will improve the competitive capacity of the national products on the external and internal markets, will favor to significant reduction of the dependency of the country on import of deep technology chemical products, setting up of production of a wide range of chemical products, reagents and preparations in Ukraine.

scholarly journals Issues of the History of the Greek Presence on Ukrainian Territory in Modern National Historiography

2021 ◽  
pp. 428-450
Author(s):  
Vladyslava Piskizhova ◽  
Keyword(s):  
National Academy Of Sciences ◽  
Azov Region ◽  
Wide Range ◽  
Ethnic History ◽  
Scientific Principles ◽  
History Of ◽  
Key Issues ◽  
The Russian Empire ◽  
High Level ◽  
Academy Of Sciences

The purpose of the study is a historiographical analysis of the works of modern Ukrainian historians on the issues of ethnic history of the Greeks of Ukraine, who belong to its oldest and most stable ethnic communities. In this regard, several tasks are set, one of which is to define main thematic areas of these studies and the degree of their analysis. The methodology is based on the scientific principles of historicism and objectivity. Specific scientific methods of historiographic analysis, synthesis, ideographic and other methods were used. Scientific novelty is determined primarily by the fact that this topic within the outlined chronological boundaries has not become the subject of a separate scientific study so far. Conclusions: Development of issues of ethnic history of the Greeks of Ukraine, which was initiated in the studies of scholars from Western European countries and the Russian Empire at the end of the XVIII – XIX centuries and has evolved significantly thanks to the scientific achievements of Soviet historians, received a new impetus in the early 1990s in the works of Ukrainian historians. The emergence of another wave of scientific interest in this topic is associated with the reset of the national historical science after the proclamation of independence of Ukraine, the imperatives of state ethnopolitics, the demands of the Ukrainian public, etc. These developments are based on a wide range of newly discovered sources and are characterized by modern research approaches, rethinking key issues of the problem, developing new theories (primarily on the ethnogenesis of Urums and Roumeans), etc. It is determined that a significant contribution to the study of the issue was made by the staff of the Institute of History of Ukraine of the National Academy of Sciences of Ukraine, in particular the Cabinet of Ukrainian-Greek Relations (since 2007 – Research Center for Ukrainian-Greek Relations) headed by N.O. Terentyeva. Against the background of a wide variety of issues on the ethnic history of Ukrainian Greeks, which have a fairly high level of development today, primarily in the history of the Greeks of Nizhyn and North Azov region, their national and cultural life in independent Ukraine is the least represented

scholarly journals An improved method for determining the total energy intensity of goods for multi-product productions

2021 ◽  
Vol 2021 (2) ◽  
pp. 12-20
Author(s):  
O.Ye. Malyarenko ◽  
◽  
V.V. Stanytsina ◽  
Keyword(s):  
Total Energy ◽  
Energy Intensity ◽  
Energy Costs ◽  
National Academy Of Sciences ◽  
Calculation Algorithm ◽  
Production Factors ◽  
Wide Range ◽  
Direct Energy ◽  
Academy Of Sciences

The total energy intensity of goods, labour and services as an indicator of energy efficiency is introduced in DSTU 3682-98 "Methods of determination of total energy cost of goods, labour and services", but some of its components listed in the standard still do not have clear algorithms for determining them. The article provides an overview of changes and extensions to the methodology presented in the articles of scientists of the Institute of General Energy of the National Academy of Sciences of Ukraine, who develop this methodology for more than 20 years. Authors propose such extensions and advancements to the methodology: the calculation algorithm of direct and technological energy intensity of goods production was advanced by the use of proportions for each product for multi-productive technologies, new calculation algorithm is proposed to assess energy intensity of labour and technological assets, also a set of hazardous pollutions was accounted in the method of assessments of abatement technologies energy intensity. The proposed advanced methodology could be used both for existing single- and multi-products technologies retrofit planning and for the design of new technological facilities taking into account a wide range of production factors including impact on the environment. Keywords: energy intensity of products, technology, direct energy intensity, total energy intensity, distribution of common energy costs

Azadirachta Indica:Indian Neem,A Natural Killer of Microorganisms

2020 ◽  
Vol 1 (28) ◽  
pp. 5-11
Keyword(s):  
Antimicrobial Activity ◽  
Skin Diseases ◽  
Modern World ◽  
National Academy Of Sciences ◽  
Neem Tree ◽  
Wide Range ◽  
The Us ◽  
Microbial Strains ◽  
Vital Component ◽  
Academy Of Sciences

Abstract-Medicinal Plants are always of immense vital component for pharmaceutical word. Azadirachta indica, commonly known as neem, has attracted worldwide prominence in recent years owing to its wide range of medicinal properties. Neem is a medicinal plant which is always at top from ancient world to modern world. The importance of the neem tree has been recognized by the US National Academy of Sciences, which published a report in 1992 entitled 'Neem- a tree for solving global problems'. Various parts of neem are sources for mankind to treat many severe diseases. More than 140 compounds have been isolated from different parts of neem. All parts of the neem tree- leaves, flowers, seeds, fruits, roots and bark have been used traditionally for the treatment of inflammation, infections, fever, skin diseases and dental disorders. Neem leafanditsconstituentshavebeendemonstrated to exhibit immunomodulatory, anti-inflammatory,antihyperglycaemic,antiulcer,antimalarial,antifungal,antibacterial,antiviral,antioxidant,antimutagenicandanticarcinogenicproperties. Keeping these points in view the present study is aimed to study antimicrobial activity of plant extracts prepared from leaves of neem plant against Klebsiella pneumoniae,Pseudomonasaeruginosa,Bacillus subtilis, Staphylococcus aureus and Escherichia coli. There is a significant antimicrobial activity observed by neem leave extract against these microbial strains.

Граница, идентичность, культура: этнография белорусско-российского пограничья: коллективная монография / отв. ред. Р.А. Григорьева, Н.Г. Деметер, А.В. Гурко / Ин-т этнологии и антропологии РАН; Центр исследований белорусской культуры, языка и литературы НАНБ

2020 ◽  
Author(s):  
Регина Антоновна Григорьева ◽  
◽  
Надежда Георгиевна Деметер ◽  
Светлана Станиславовна Крюкова ◽  
Татьяна Александровна Листова ◽  
...  
Keyword(s):  
Practical Importance ◽  
Field Research ◽  
National Academy Of Sciences ◽  
Joint Research ◽  
Border Area ◽  
Cultural Elements ◽  
Wide Range ◽  
Language And Literature ◽  
The Republic ◽  
Academy Of Sciences

В монографии представлены результаты совместных исследований белорусских и российских этнологов, которые проводились по всему периметру белорусско-российского пограничья: в Гомельской, Могилевской, Витебской областях со стороны Республики Беларусь; Брянской, Смоленской, Псковской со стороны РФ. На основе многолетних полевых изысканий, с привлечением архивных материалов, данных социологических опросов, были выявлены единство и/или различия элементов культуры по разные стороны границы во всем их многообразии, и обозначены трансграничные этнокультурные ареалы. Одна из ключевых проблем исследования – особенности формирования этнической идентичности в разных государствах и в условиях слабой этнокультурной отличительности жителей на пограничном пространстве. Изучение трансграничных связей и контактов имеет практическое значение для формирования различного рода сотрудничества между соседними странами. Книга предназначена для специалистов в области этнологии и других гуманитарных наук, а также для широкого круга читателей. Border, identity, culture: ethnography of the Belarusian-Russian borderland. collective monograph / executive. ed. R.A. Grigorieva, N.G. Demeter, A.V. Gurko / Institute of Ethnology and Anthropology RAS; Center for Research of Belarusian Culture, Language and Literature of the National Academy of Sciences of Belarus. - M .: IEA RAN, 2020 .-- 360 p. This monograph represents the results of joint research of Belarusian and Russian ethnologists, which were carried out along the entire perimeter of the Belarusian-Russian border area: in the Gomel, Mogilev, Vitebsk regions from the Republic of Belarus; Bryansk, Smolensk, Pskov from the Russian Federation. On the basis of many years of field research, with the involvement of archival materials, data from sociological surveys, the unity and / or differences of cultural elements on different sides of the border in all their diversity were identified, and transboundary ethnocultural areas were identified. One of the key problems of the study is the peculiarities of the formation of ethnic identity in different states and in the conditions of weak ethnocultural distinctiveness of residents in the border area. The study of cross-border relations and contacts has a practical importance for the formation of various kinds of cooperation between neighboring countries. The book is dedicated for specialists in the field of ethnology and other humanities, as well as for a wide range of readers.

scholarly journals A New Hybrid Methodology for Nonlinear Time Series Forecasting

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Mehdi Khashei ◽  
Mehdi Bijari
Keyword(s):  
Time Series ◽  
Linear Models ◽  
Nonlinear Models ◽  
Time Series Forecasting ◽  
Data Set ◽  
Wide Range ◽  
Alternative Methodology ◽  
Opposite Situation ◽  
High Degree ◽  
Universal Approximators

Artificial neural networks (ANNs) are flexible computing frameworks and universal approximators that can be applied to a wide range of forecasting problems with a high degree of accuracy. However, using ANNs to model linear problems have yielded mixed results, and hence; it is not wise to apply them blindly to any type of data. This is the reason that hybrid methodologies combining linear models such as ARIMA and nonlinear models such as ANNs have been proposed in the literature of time series forecasting. Despite of all advantages of the traditional methodologies for combining ARIMA and ANNs, they have some assumptions that will degenerate their performance if the opposite situation occurs. In this paper, a new methodology is proposed in order to combine the ANNs with ARIMA in order to overcome the limitations of traditional hybrid methodologies and yield more general and more accurate hybrid models. Empirical results with Canadian Lynx data set indicate that the proposed methodology can be a more effective way in order to combine linear and nonlinear models together than traditional hybrid methodologies. Therefore, it can be applied as an appropriate alternative methodology for hybridization in time series forecasting field, especially when higher forecasting accuracy is needed.

scholarly journals Academic online encyclopedias in view of the recent information space developing

2018 ◽  
Vol 10 ◽  
pp. 39-49
Author(s):  
Mykola Zhelezniak ◽  
Oleksandr Ishchenko
Keyword(s):  
Information Technology ◽  
Information Space ◽  
National Academy Of Sciences ◽  
Recent Information ◽  
Wide Range ◽  
Online Encyclopedia ◽  
Academy Of Sciences ◽  
Technological Opportunities

The article describes the phenomenon of the electronic encyclopedia activity and investigates the electronic Internet encyclopedias created by the institutions of the National Academy of Sciences of Ukraine. It has been discovered that electronic encyclopedias can be divided into several varieties, the main of which is online encyclopedias, which are highly distinguished in comparison with classical printed publications by the characteristics caused by the development of information technology. In accordance with this division, the national academic encyclopedic resources are characterized in the article. The idea of the importance of creating an online encyclopedia about the National Academy of Sciences of Ukraine is presented; it also argued that current online encyclopedias are not fully equipped with a wide range of technological opportunities for their use.

scholarly journals PETRO FEODOSIIOVYCH GOZHYK: OCEANIC, MARINE AND ANTARCTIC RESEARCH

2021 ◽  
Vol 14 (1) ◽  
pp. 17-25
Author(s):  
Olexandra P. Olshtynska ◽  
Stanislav P. Olshtynsky
Keyword(s):  
Research Center ◽  
Marine Geology ◽  
National Academy Of Sciences ◽  
Research Programs ◽  
Wide Range ◽  
The World ◽  
Antarctic Research ◽  
Geological Sciences ◽  
Academy Of Sciences

The article provides a brief overview of the publications, as well as our own memories about the doctor of geological and mineral  sciences, Academician Petro Feodosiiovych Gozhyk — scientist, researcher that had state- and strategic level thinking, about  his contribution to the development of marine geological works in the Institute of Geological Sciences of the National Academy  of Sciences of Ukraine, his role in the creation of the Ukrainian Antarctic Center (nowadays the National Antarctic Research  Center of The National Academy of Sciences of Ukraine) and the importance of his personality for the formation of Ukraine as  «Antarctic State». P.F. Gozhyk was not only one of the initiators of the Center for Antarctic Research of the National Academy of Sciences of Ukraine, but also its first director, the developer of long-term polar research programs at the station «Academician  Vernadsky». His scientific interests were focused on a wide range of subjects, and marine geology was among his scientific priorities. Academician P. F. Gozhyk was an organizer and participant of many round-the-world sea and ocean expeditions to  the Indian, Atlantic and Southern oceans, the Red and Black Seas.  The main publications of P. F. Gozhyk on «geology of the seas and oceans» and «geological studies of Antarctica» are listed in the article. 

Wrongful Convictions

2020 ◽  
Vol 3 (1) ◽  
pp. 245-259
Author(s):  
Brandon L. Garrett
Keyword(s):  
Criminal Justice ◽  
Policy Reforms ◽  
National Academy Of Sciences ◽  
Wrongful Convictions ◽  
Police Investigations ◽  
Wide Range ◽  
Policy Work ◽  
Law And Science ◽  
Academy Of Sciences ◽  
Research And Policy

In response to wrongful convictions, there has been a revolution in criminal procedure and research in law and science. This review seeks to summarize the cross-disciplinary explosion in work studying known wrongful convictions, examining their causes, and assessing policy reforms designed to help detect and prevent errors in criminal justice. Scholars have increasingly studied the characteristics of known wrongful-conviction cases, including by analyzing archival records and by creating public registries of exonerations. Scholars have conducted research in law, psychology, statistics, criminology, and other disciplines, as well as interdisciplinary research, designed to better understand the phenomenon of wrongful convictions and how to prevent errors. Scientific bodies, such as the National Academy of Sciences, have made important recommendations based on this research. Furthermore, the conversation is global, with litigation, research, and policy work across jurisdictions. A wide range of jurisdictions have adopted noteworthy changes designed to safeguard crucial types of evidence, such as confession, forensic, and eyewitness evidence, during police investigations and at trial. As a result, law and science have increasingly come together to produce tangible improvements to criminal justice.

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