Organic Petrographical Features of Fly Ashes Originating from Coal and Coal-SRF Co-Combustion

In this study, the features of fly ashes originating from industrial-scale high volatile bituminous coal combustion and co-combustion of coal with 10% admixture of alternative fuel SRF (solid recovered fuel) are presented, with emphasis on the organic petrographical characteristics. The organic petrographical and mineralogical data are co-evaluated with geochemical data, with the aim to provide a full classification of the studied fly ashes, as well as base information toward any potential application of this waste material, according to the recycling economy principles. By applying organic petrographical methods, the assignment of the carbon-rich residuals to the respective feed fuel, either coal or SRF, can be achieved. The obtained quantitative evaluation provides useful information regarding the combustion conditions in the stoker boiler. The analyzed fly ashes contain significant C-residuals, mostly in the form of fused, dense, and anisotropic particles, while the enrichment in sooty particles is caused due to the addition of SRF fuel. In conjunction with the moderate-low content of potential hazardous elements, the features of the contained C-residual phases suggest that these fly ashes could possibly be the subject of further studies for their applicability as soil improvements.

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СОЦИАЛЬНАЯ КОНФЛИКТОЛОГИЯ: ТЕОРЕТИКО-ИСТОРИЧЕСКИЙ АСПЕКТ

Konfliktologia ◽

10.31312/2310-6085-2020-15-2-68-80 ◽

2020 ◽

Vol 15 (2) ◽

pp. 68

Author(s):

А. Н. Сухов

Keyword(s):

Theory And Practice ◽

Important Task ◽

Social Conflicts ◽

Psychological Approach ◽

Structure Dynamics ◽

History Of ◽

The Subject ◽

First Time

This given article reveals the topicality not only of destructive, but also of constructive, as well as hybrid conflicts. Practically it has been done for the first time. It also describes the history of the formation of both foreign and domestic social conflictology. At the same time, the chronology of the development of the latter is restored and presented objectively, in full, taking into account the contribution of those researchers who actually stood at its origins. The article deals with the essence of the socio-psychological approach to understanding conflicts. The subject of social conflictology includes the regularities of their occurrence and manifestation at various levels, spheres and conditions, including normal, complicated and extreme ones. Social conflictology includes the theory and practice of diagnosing, resolving, and resolving social conflicts. It analyzes the difficulties that occur in defining the concept, structure, dynamics, and classification of social conflicts. Therefore, it is no accident that the most important task is to create a full-fledged theory of social conflicts. Without this, it is impossible to talk about effective settlement and resolution of social conflicts. Social conflictology is an integral part of conflictology. There is still a lot of work to be done, both in theory and in application, for its complete design. At present, there is an urgent need to develop conflict-related competence not only of professionals, but also for various groups of the population.

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OBJECTIVE CLASSIFICATION OF FRACTIONAL CRYSTALLIZATION, ASSIMILATION AND RECHARGE SIGNATURES IN MULTIDIMENSIONAL WHOLE ROCK GEOCHEMICAL DATA

10.1130/abs/2020am-355086 ◽

2020 ◽

Author(s):

Rachel Lynn Hampton ◽

◽

Leif Karlstrom

Keyword(s):

Fractional Crystallization ◽

Geochemical Data ◽

Objective Classification

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Powerfully nilpotent groups of rank 2 or small order

Journal of Group Theory ◽

10.1515/jgth-2020-0016 ◽

2020 ◽

Vol 23 (4) ◽

pp. 641-658

Author(s):

Gunnar Traustason ◽

James Williams

Keyword(s):

Detailed Analysis ◽

Special Kind ◽

Nilpotent Groups ◽

Nilpotency Class ◽

Central Series ◽

Rank 2 ◽

Full Classification

AbstractIn this paper, we continue the study of powerfully nilpotent groups. These are powerful p-groups possessing a central series of a special kind. To each such group, one can attach a powerful nilpotency class that leads naturally to the notion of a powerful coclass and classification in terms of an ancestry tree. In this paper, we will give a full classification of powerfully nilpotent groups of rank 2. The classification will then be used to arrive at a precise formula for the number of powerfully nilpotent groups of rank 2 and order {p^{n}}. We will also give a detailed analysis of the ancestry tree for these groups. The second part of the paper is then devoted to a full classification of powerfully nilpotent groups of order up to {p^{6}}.

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Industrial-scale Investigations on Combustion Characteristics and NOx Emissions of a 300-MWe Down-fired Boiler: Bituminous Coal Combustion and Coal Varieties Comparison

Combustion Science and Technology ◽

10.1080/00102202.2021.1912028 ◽

2021 ◽

pp. 1-20

Author(s):

Xin Zhang ◽

Zhichao Chen ◽

Liankai Li ◽

Lingyan Zeng ◽

Zhengqi Li

Keyword(s):

Coal Combustion ◽

Bituminous Coal ◽

Combustion Characteristics ◽

Industrial Scale ◽

Nox Emissions

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Influence of Different Mineral Precursors on the Properties of Fly Ash Based Alkali-Activated Mortars

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.761.73 ◽

2018 ◽

Vol 761 ◽

pp. 73-78 ◽

Cited By ~ 1

Author(s):

Matej Špak ◽

Pavel Raschman

Keyword(s):

Mechanical Properties ◽

Fly Ash ◽

Chemical Composition ◽

Coal Combustion ◽

Pure Aluminum ◽

Partial Replacement ◽

Black Coal ◽

Fly Ashes ◽

Final Composition ◽

Alkali Activated

Alkali-activated materials based on fly ash are widely developed and also produced on the present. Some of fly ashes are not suitable for production of alkali-activated materials because of their inconvenient chemical composition. Alumina-silicates are the most important components that are needed to accomplish the successful reaction. The proper content of amorphous phase of alumina-silicates and its proportion as well should be provided for the final composition of alkali-activated materials. The influence of pure aluminum oxide powder as well as raw milled natural perlite on mechanical properties and durability of alkali-activated mortars was investigated. These minerals were used as partial replacement of fly ash coming from black coal combustion. In addition, the mortars were prepared by using different alkali activators.

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Latviešu metālmūzikas albumu nosaukumi

Aktuālās problēmas literatūras un kultūras pētniecībā: rakstu krājums ◽

10.37384/aplkp.2021.26-1.361 ◽

2021 ◽

pp. 361-369

Author(s):

Ingars Gusāns

Keyword(s):

Current Situation ◽

Creative Work ◽

Distinctive Character ◽

Literary Works ◽

The Third ◽

Metal Music ◽

Local Character ◽

The Subject ◽

The Common

The aim of the study is to describe the titles of Latvian metal music albums, from the perspective of content, by identifying the common and distinctive character of the metallic music tradition, and perhaps even the local one. Of 241 album titles (data on Dec. 31, 2019), most are in English, some in French, Latin, Russian, some consisting of digits, and 69 titles in Latvian. These titles are the subject of the research. The main source is Encyclopaedia Metallum (www.metal-archives.com), which still does not reflect the current situation concerning Latvian metal music. Album titles in this study are viewed separately from album designs and song titles and are analysed from the perspective of content. The album title is an important part of the work that has been issued because it is an element that makes the audience/buyer pay attention to the album because it must not be forgotten that today the album is also an item that you want to sell. In general, it can be concluded that Latvian metal musicians, with their album titles in Latvian, are mostly following world trends, as evidenced by the integration in the researcher Deena Weinstein’s classification of Dionysian discourse and discourse on chaos. Most titles are more relevant to the discourse on chaos because the thematic circle of chaos is wider. Latvian mythology, along with history, is an up-to-date source for the creative work of bands that is responsible for the local feeling of the titles. A large enough number are titles that are difficult to fit in the Weinstein’s division and form the third group with philosophical titles and simply all sorts of titles. If the philosophical titles follow the world’s trends, the simple titles include the names of the events, tributes, and the titles of literary works, which give them a local character.

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CLASSIFICATION OF RUSSIAN CULTURE-BOUND TERMS AND THEIR EQUIVALENTS BASED ON THE TRANSLATION OF “QUIET FLOWS THE DON” BY M. A. SHOLOKHOV

HUMANITARIAN RESEARCHES ◽

10.21672/1818-4936-2020-76-4-148-154 ◽

2020 ◽

Vol 76 (4) ◽

pp. 149-155

Author(s):

SVETLANA S. UZHAKINA ◽

Keyword(s):

English Language ◽

Great Influence ◽

Political Life ◽

Daily Routine ◽

The Novel ◽

Russian Culture ◽

The Subject ◽

Cultural Component ◽

Historical Epoch

The classification of Russian culture-bound terms used in the novel “Quiet Flows the Don” by M. A. Sholokhov and in its translation into the English language. The novel “Quiet Flows the Don” by M.A. Sholokhov and its translation into English done by Robert Daglish have served as the source for the research of culture-bound terms. These terms have been classified on the basis of the subject division offered by S. Vlakhov and S. Florin. It is proved that the interest to the study of culture-bound terms is still important. The relevance of the research is determined by the fact that despite numerous research papers in this field the origin, classification and translation of these terms still need some investigation. The aim of the present study is to classify the culture-bound terms taken from the novel “Quiet Flows the Don” by M.A. Sholokhon and its translation into the English language. As a result, there have bben taken 407 samples of the lexical units with a cultural component which were classified according to the subject principal offered by S. Vlakhon and S. Florin. The culture-bound terms have a great influence on a foreign reader as they are cultural units that transmit the information of the daily routine and the historical epoch described in the novel. The culture-bound terms taken from the novel “Quiet Flows the Don” by M.A. Sholokhov and its translation are analyzed and classified. The division of the culture-bound terms according to the subject principal allowed to reveal that most terms refer to the daily routine, social and political life and military terms.

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On the maximal Sobolev regularity of distributions supported by subsets of Euclidean space

Analysis and Applications ◽

10.1142/s021953051650024x ◽

2016 ◽

Vol 15 (05) ◽

pp. 731-770 ◽

Cited By ~ 6

Author(s):

D. P. Hewett ◽

A. Moiola

Keyword(s):

Maximal Regularity ◽

Cantor Sets ◽

Characteristic Functions ◽

Bessel Potential ◽

Empty Interior ◽

Cartesian Products ◽

Sobolev Regularity ◽

Full Classification ◽

Differential And Integral Equations

This paper concerns the following question: given a subset [Formula: see text] of [Formula: see text] with empty interior and an integrability parameter [Formula: see text], what is the maximal regularity [Formula: see text] for which there exists a non-zero distribution in the Bessel potential Sobolev space [Formula: see text] that is supported in [Formula: see text]? For sets of zero Lebesgue measure, we apply well-known results on set capacities from potential theory to characterize the maximal regularity in terms of the Hausdorff dimension of [Formula: see text], sharpening previous results. Furthermore, we provide a full classification of all possible maximal regularities, as functions of [Formula: see text], together with the sets of values of [Formula: see text] for which the maximal regularity is attained, and construct concrete examples for each case. Regarding sets with positive measure, for which the maximal regularity is non-negative, we present new lower bounds on the maximal Sobolev regularity supported by certain fat Cantor sets, which we obtain both by capacity-theoretic arguments, and by direct estimation of the Sobolev norms of characteristic functions. We collect several results characterizing the regularity that can be achieved on certain special classes of sets, such as [Formula: see text]-sets, boundaries of open sets, and Cartesian products, of relevance for applications in differential and integral equations.

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VIII.—On the calcification of the vertebral centra in sharks and rays

Philosophical Transactions of the Royal Society of London Series B Containing Papers of a Biological Character (1896-1934) ◽

10.1098/rstb.1921.0008 ◽

1921 ◽

Vol 210 (372-381) ◽

pp. 311-407 ◽

Cited By ~ 58

Keyword(s):

Natural History ◽

Research Laboratory ◽

British Museum ◽

Imperial College ◽

Vertebral Centra ◽

The Subject ◽

Elasmobranch Fishes ◽

Fossil State

In this paper are recorded the results of an investigation undertaken at the instance of Dr. A. Smith Woodward for the purpose of ascertaining to what extent the pattern presented by the calcified laminæ of the centrum is of value as an aid to the classification of Elasmobranch fishes, and to the identification of vertebræ found in the fossil state. The subject was dealt with exhaustively in 1879-1885 by Hasse, who, in his monograph ‘Das natürliche System der Elasmobranchier,’ claimed that the differences in the disposition of the calcified laminæ in the various genera and families of Elasmobranchs occur with such constancy and regularity that they may be accepted with confidence as an important factor in taxonomy. During the years, however, that have passed since the publication of this monograph the thesis has come to be looked upon with suspicion, and vertebrate morphologists at the present time do not, as a whole, regard Hasse’s definitions of the Cyclospondyli, Tectospondyli, and Asterospondyli as consistently applicable to the genera and species included by him within those groups. The material studied in the course of the investigation was to a large extent accumulated several years ago (see p. 313), and it was only the superior attraction of Cephalodiscus as a subject of research that prevented the work from being brought to an earlier conclusion. The examination of this accumulated material, and of that more recently acquired, was carried on in the Huxley Research Laboratory of the Imperial College of Science during the winter of 1917 and from May, 1919, to May, 1920, and I hereby acknowledge my great indebtedness to Prof. E. W. MacBride and the administrative officers of the College for the facilities offered there for the prosecution of the work. I have further to thank Prof. MacBride for frequent advice and for valuable suggestions made during the progress of the research. My thanks are also due, and are hereby tendered, to Dr. A. Smith Woodward and Mr. C. Tate Began, of the British Museum (Natural History), for many helpful hints and suggestions. Acknowledgments and thanks for material kindly furnished by various donors are recorded on p. 313.

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