scholarly journals Assessment of the Ice Wedge Polygon Current State by Means of UAV Imagery Analysis (Samoylov Island, the Lena Delta)

2019 ◽  
Vol 11 (13) ◽  
pp. 1627 ◽  
Author(s):  
Andrei Kartoziia

Modern degradation of Arctic permafrost promotes changes in tundra landscapes and leads to degradation of ice wedge polygons, which are the most widespread landforms of Arctic wetlands. Status assessment of polygon degradation is important for various environmental studies. We have applied the geographic information systems’ (GIS) analysis of data from unmanned aerial vehicles (UAV) to accurately assess the status of ice wedge polygon degradation on Samoylov Island. We used several modern models of polygon degradation for revealing polygon types, which obviously correspond to different stages of degradation. Manual methods of mapping and a high spatial resolution of used UAV data allowed for a high degree of accuracy in the identification of all land units. The study revealed the following: 41.79% of the first terrace surface was composed of non-degraded polygonal tundra; 18.37% was composed of polygons, which had signs of thermokarst activity and corresponded to various stages of degradation in the models; and 39.84% was composed of collapsed polygons, slopes, valleys, and water bodies, excluding ponds of individual polygons. This study characterizes the current status of polygonal tundra degradation of the first terrace surface on Samoylov Island. Our assessment reflects the landscape condition of the first terrace surface of Samoylov Island, which is the typical island of the southern part of the Lena Delta. Moreover, the study illustrates the potential of UAV data GIS analysis for highly accurate investigations of Arctic landscape changes.

2021 ◽  
pp. 159-173
Author(s):  
N. N. Shpilnaya ◽  

The article is an outline of the development of Dialogical Linguistics in Russia. It represents its milestones of formation and the current state. Dialogical Linguistics is considered to be an integral linguistic branch, claiming the status of a distinct «research program» and comprises such sections as follows: Linguistics of Dialogical Text, Linguistic Theory of Replication, Interactional Theory of Dialogue, General Theory of Dialogue. In the final part of the article, the principles of dialogical modeling of linguistic objects are being formulated.


Author(s):  
Marinko Lazzarich

Some people view teaching as a mission, many others consider it as just another job. Teaching profession is publicly perceived as socially valuable and important, a job essential for the development of fundamental societal and human values. However, in 2019 Croatia, one still cannot speak of teaching as a profession. The public perceives teacher's expected high level of enthusiasm as a basic quality of an educator, rather than expecting a high degree of professionalism. Consequently, unlike education policies in some European countries, the historical development of the upgrade to the teaching profession in Croatia is somewhat lagging behind. The text analyses the status of teachers and the acceptance of the educational profession in Croatia as well as the working conditions in the Croatian education. We present research results of attitudes towards the teaching profession and the social status of teachers expressed by students enrolled in the Faculty of Teacher Education, University of Rijeka. The main objective of the research was to determine the attitudes of students on the current status of teachers in Croatia, concurrently examining the level of their readiness to actively engage in achieving better social and material status of teachers. The research was conducted in 2018 using the survey method. The results confirmed that the respondents possess developed awareness of the deficiencies in the Croatian school system and the underpaid teaching staff. Aware of the basic weaknesses in the education policy, respondents expressed their willingness to engage in solving these problems. The results also clearly pointed to the need for an essential educational reform to improve the status of the teaching staff.


2020 ◽  
Vol 26 (3) ◽  
pp. 630-643
Author(s):  
A.V. Chernov

Subject This article considers the issues related to project financing in Russia, its current status, foreign practices in this area, as well as in the context of public-private partnership. Objectives The article aims to explore the current state and development of project financing in Russia and foreign countries, analyze and identify risks, and consider trends in the further development of project financing. Methods For the study, I used the methods of comparative, logical, and statistical analyses, and graphical interpretation of information. Results The article defines project financing, identifies risks, and denotes trends in its global and domestic development. Conclusions and Relevance The introduction and application of public and market management models, or their combination, may be an incentive for further development of project financing. Today, the most promising direction is the use of project financing as a method of financing investment activities. The results of the study are theoretically relevant for further research into the financing of infrastructure projects in Russia.


Author(s):  
Ye.Ye. Nikitin

The current situation in the sphere of district heating is analysed on the basis of use of the cognitive approach. The presence of closed chains of cause-effect relationships of negative factors and conflicts of target settings of the subjects in the field of district heating is shown. The conceptual model of energy efficient modernization of district heating systems is proposed. This model includes indicators of the current status of heat sources, networks and heat consumers, energetic and economic models, restrictions, procedure of forming and analysis of the mutual influence of the recommended projects. The quantitative data on indicators of the current state of district heating systems of the cities of Ukraine are presented. The interrelation between indicators of the current state and projects of energy efficient modernization of district heating systems is shown. Assessment of energy self-sufficiency of municipal district heating systems on condition of thermal modernization of buildings is carried out. The creation of energy management systems at the district heating enterprises is proposed. Bib. 6, Fig. 7, Tab. 5.


1988 ◽  
Vol 27 (2) ◽  
pp. 217-218
Author(s):  
Luther Tweeten

The authors describe how Pakistan has grappled with land reform, surely one of the most intractable and divisive issues facing agriculture anywhere. The land-tenure system at independence in 1947 included a high degree of land ownership concentration, absentee landlordism, insecurity of tenant tenure, and excessive rent. Land reform since 1947 focused on imposition of ceilings on landholding, distribution of land to landless tenants and small owners, and readjustments of contracts to improve the position of the tenant. These reformist measures have removed some but by no means all of the undesirable characteristics of the system. The authors list as well as present a critique of the reports of five official committees and commissions on land reform. The reports highlight the conflicts and ideologies of the reformers. The predominant ideal of the land reformers is a system of peasant proprietorship although some reformers favoured other systems such as communal farming and state ownership of land, and still others favoured cash rents over share rents. More pragmatic reformers recognized that tenancy is likely to be with Pakistan for the foreseeable future and that the batai (sharecropping) arrangement is the most workable system. According to the editors, the batai system can work to the advantage of landlord and tenant if the ceilings on landholding can be sufficiently lowered (and enforced), the security of the tenant is ensured, and the tenant has recourse to the courts for adjudication of disputes with landlords. Many policy-makers in Pakistan have come to accept that position but intervention by the State to realize the ideal has been slow. The editors conclude that" ... the end result of these land reforms is that they have not succeeded in significantly changing the status quo in rural Pakistan" (p. 29).


2019 ◽  
pp. 91-94
Author(s):  
T. M. Lysenko ◽  
V. Yu. Neshatayeva ◽  
Z. V. Dutova

The International conference “Flora and conservation in the Caucasus: history and current state of knowledge” dedicated to the 130-year anniversary of the Perkalsky Arboretum took place at 22–25 of May 2019 in Pyatigorsk (Stavropol Territory) on the base of the Pyatigorsk Museum of local lore and natural history. The participants were from 11 cities of Russia and 7 Republics of the Caucasus and represented 14 institutions. Proceedings of the conference were published by the beginning of the meeting the book of abstracts includes 49 papers on the study of vascular plants, bryophytes, lichens and fungi, plant communities, as well as the protection of rare and endangered species, unique plant communities, and ecological problems in the Caucasus. The following geobotanical topics were highlighted in 13 papers: forest communities (3 reports), meadow and steppe vegetation (2), xeric open forests (2), communities of ecotone areas (1), structure of populations of rare plant species (3), as well as the history and current status of nature protected areas (2). The great emphasis has been focused on the study of floristic composition and plant populations. Thus, the conference showed that very few studies от vegetation are currently carried out in the Caucasus, and a lot of districts are not affected by the research. The greatest attention is paid to forest vegetation while meadow, steppe, alpine heath and xerophytic communities are studied rather poorly. Besides, there are “white spots” — mire, floodplain and aquatic vegetation. In nowadays, when the anthropogenic impact on the plant cover of the Caucasus is intensively increasing, it is especially important to study natural undisturbed communities preserved in protected natural areas. Another important issue is the conservation of the unique vegetation cover of the whole Caucasus. Thus, the study of vegetation of this region opens a wide field for researchers using various methods of modern plant science.


1999 ◽  
Vol 16 (1) ◽  
Author(s):  
Murad Wilfried Hofmann

This article examines the state of Islamic jurisprudence with regard to many sensitive issues, such as the status of women and minorities in Islam, Islam and Democracy, hudud punishments. The author explores the current state of Islamic discourse on jurisprudence and identifies three approaches-traditional, secular and reformist. The paper explores the positions of the traditional ulama and the reformist muj­tahids on the mentioned topics and finds the reformist position more sensible and closer to the position of ihe Qur'an and Sunnah. This paper while advocating neo-ijtihad, makes an impressive case for the merit???? and Islamic credibility of the reformist jurisprudence.


Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4423
Author(s):  
Marco A. Castro-Rojas ◽  
Yadira I. Vega-Cantu ◽  
Geoffrey A. Cordell ◽  
Aida Rodriguez-Garcia

Glass ionomer cements and resin-based composites are promising materials in restorative dentistry. However, their limited mechanical properties and the risk of bulk/marginal fracture compromise their lifespan. Intensive research has been conducted to understand and develop new materials that can mimic the functional behavior of the oral cavity. Nanotechnological approaches have emerged to treat oral infections and become a part of scaffolds for tissue regeneration. Carbon nanotubes are promising materials to create multifunctional platforms for dental applications. This review provides a comprehensive survey of and information on the status of this state-of-the-art technology and describes the development of glass ionomers reinforced with carbon nanotubes possessing improved mechanical properties. The applications of carbon nanotubes in drug delivery and tissue engineering for healing infections and lesions of the oral cavity are also described. The review concludes with a summary of the current status and presents a vision of future applications of carbon nanotubes in the practice of dentistry.


2021 ◽  
pp. 026666692110154
Author(s):  
Usman Ahmed Adam ◽  
Kiran Kaur

Institutional repositories are powerful tools to facilitate global access to intellectual output by members of the institution, particularly in assisting them to preserve and maximize access to their research output globally. This exploratory study of the status of institutional repositories implementation in African countries using the global Directory of Open Access Repositories (OpenDOAR) and Transparent Ranking: All Repositories by Google Scholar, reports on the operational status and the performance of repositories. Factor analysis and cluster analysis are used to analyze the operational level of institutional repositories in African countries. The analysis showed that the typical performance of institutional repositories remains below average. The possibility of global open access to research results through institutional repositories in South Africa, Kenya, Nigeria, Algeria, Sudan, and Egypt appeared to be relatively more feasible than other African countries. This study concludes that many organizations, institutions, and societies spend great efforts in support of open access implementation in Africa, however, the widespread implementation of institutional repositories is still very slow paced, and the performance of the implemented repositories was below expectation. Suggestions for regaining the intended direction of African institutional repositories are given based on the current status.


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