scholarly journals Experimental Study of the Aggregate Shapes in Self-Compaction

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Mehrdad Mohaddes Pour ◽  
Seyed Sina Razavi Taheri

Compaction operations have a vital role in embankments or rock fills to avoid settlement, but in some projects, such as marine ones, it is hardly possible to accomplish compaction operations due to the problems and executive limitations. In situations with no possibility of compaction, it is recommended to use single-size or self-compacted materials. From a theoretical point of view, self-compacted materials consist of coarse aggregates with no vast domain of gradation. In this case, the porosity of the materials in the dense state is not significantly different from the loose one, and a relatively dense condition occurs after it is poured; thus, the mass of materials will undergo lower volumetric changes in the future. In this study, the self-compacted characteristic of materials has been investigated using real aggregates with different gradations (the ratio of the largest to the smallest aggregate size of 1, 2, 4, and 8). The gradation and shape of aggregates are the main variables examined in the research. Real aggregates have been used in order to compare the study of self-compacted idea with ideal aggregates and the effects of sphericity and angularity of them. According to the experiments carried out on samples in the present work, it was observed that, without compaction operations, even ideal materials would not be in fully self-compacted state. However, relatively denser conditions can be achieved by observing the necessary points. Moreover, aggregates with high sphericity have better self-compacted property. Furthermore, the more uniform gradation and bigger size of materials lead to more self-compacted pile of materials.

EL LE ◽  
2020 ◽  
Author(s):  
Davide Astori

If much attention has been gained in recent times by sign languages (in particular in the comparison on their nature and on their main peculiar properties also towards a recognition as proper languages, as well as on the challenges they pose to some traditional notions which have been employed so far to describe linguistic phenomena), their possible value from the perspective of inclusiveness deserves at least a brief reflection: the debate on this topic could be moved, from a theoretical point of view, within the search for vehicular languages that conformed humanity’s whole cultural life (in different ways and times), to discuss the possibility that a sign language could also propose itself, among others, in the future, as auxiliary.


Author(s):  
А.V. Oposhnyansky ◽  

The article is devoted to the problem of modernization of the Russian society, which is central from a practical and theoretical point of view for the existence of the Russian state. It is connected with the nature of the culture of Russian civilization, with the sociocultural type of personality and society that requires its reformatting. These are both traditional mechanisms involved in the reproduction of Russian society and innovative development factors. The focus is on the modern civilizational Challenge, which has stretched over several decades. Even such a grandiose transformation as the deconstruction of the USSR did not lead to the Answer to the Challenge. A closed, authoritarian type of Russian society with a two-dimensional traditional cultural code can be modernized only by using an external factor as a transformation lever. The article describes the specifics of Russian civilization in connection with the peculiarities of modernization at the stage of transition to post-industrial society. This transition included a crisis of a two-dimensional sociocultural code reflected in Soviet ideology and social practice, overcoming the closure of the country, and using the social and technological innovations of the West. The two-dimensional code did not provide restructuring and transition to post-industrial civilization by borrowing technological and social innovation. Modern ontology of sociality is constructed by synergy of media interactions. Media is a word and deed that designs and formats social reality. At present, the humanities can be anthropologically effective if they turn into media design that designs and formats social reality. The creators of social and anthropological design are social energy actors — scientists, proactive subcultures. The traditional national sociocode is gradually transformed under the influence of globalization, adapted to it, or aggressively extremist enters the fight against postmodernization (fundamentalist extremism). The postmodernization of the Russian society includes its diversification, also manifests itself in a multiplicity of intents into the future. The two-dimensional code of negative identity is overcome, according to the laws of synergy, through chaos and new sociality will be formed either spontaneously or by the method of managed chaos, if domestic managers, who still keep the Russian society in a state of sluggish stagnation, are ripe for it. However, the principle of bifurcation reminds us that the future is ambiguous. Without mastering the art of managed chaos, one cannot take a productive step in social governance and development.


2021 ◽  
pp. 63-86
Author(s):  
Ingunn Marie Eriksen ◽  
Kari Stefansen ◽  
Guro Ødegård

This chapter investigates how young people’s “projects of the self” – their self-presentations and orientations towards the future – are shaped by economic, cultural and relational capital, as well as place. What does growing up in families with different access to important resources entail, and what does place mean for young people’s experiences of themselves and their future opportunities? Based on an ongoing qualitative longitudinal study of 81 youths from four widely different communities, we describe a typology with four projects of the self: the assured optimist, the local thriving youth, the youth on a narrow path and the loosely anchored youth. These projects are closely linked to the youths’ family resources, and to a large extent they map onto traditional social class divisions. However, although the way that resources are linked to different projects of the self has the potential of shaping classed trajectories, they are not determined by class. Our analysis adds nuances to the general finding in youth research that lack of economic and cultural capital is associated with more limited future possibilities. We find that emotional and relational resources in the family also play a vital role in shaping young people’s projects of the self – which sometimes cross traditional class divisions. Moreover, we find that when young people’s projects of the self align with resources in the local environment and in the family, this greatly enhances their well-being and surety of the future. Youths who experience a rift between their projects of the self and the resources around them experience a shakier foundation from which to carve out their life projects.


Author(s):  
Ji-Young Lee

The concluding chapter begins by offering a succinct summary of the book’s overall arguments and elaborates how they contribute to the fields of international relations, Asian Studies, and social science more broadly. It then discusses the relevance of the book’s arguments for ongoing policy debates regarding the future of American hegemony with the rise of China. From a meta-theoretical point of view, I end the book with a caveat that one cannot predict the future with certainty.


2019 ◽  
Vol 63 (11) ◽  
pp. 1578-1596 ◽  
Author(s):  
Donatella della Porta

This concluding article of the special issues summarizes the empirical results presented in the previous contributions within a comparative perspective, with particular attention to locate them within previous research on youth mobilizations. From the theoretical point of view, the articles, based on the research conducted in the context of the CRY_OUT project, have tried to bridge some concepts in youth studies and social movement studies. Using the concept of generations in a critical way, we have in fact aimed at deconstructing it by looking at the meaning given to generations by movement activists, to their self-perception in terms of generational identification, as well as their taste in terms of contentious frames and practices. Empirically, we have addressed, in particular, the mobilization of Millennials in anti-austerity protests on issues such as labor and also women’s and gender rights, antiracism, environmental protests, and alternative cultural and/or recreational initiatives. Focusing on Europe, we have chosen some paradigmatic cases of protests in the United Kingdom, Southern European Italy and Spain, and Eastern European Poland. In light of the theoretical questions presented in the introduction, this article addresses, in turn, the conceptions of generations in movements, the self-assessment by Millennials, as well as some characteristics of their mobilizations in terms of organizational structures, repertories of action, and collective framing.


2015 ◽  
Vol 3 (2) ◽  
Author(s):  
Masahiko Yoshino ◽  
Zhenxing Li ◽  
Motoki Terano

The authors previously developed a new fabrication method for a metal nanodot array, by combination of nanogroove grid patterning and thermal dewetting of metal deposited on a substrate. However, a comprehensive understanding of the thermal dewetting mechanism is necessary to improve the quality and control the variation of the metallic nanodot array. In this study, thermal dewetting-induced nanodot agglomeration mechanism is studied from a theoretical point of view. An analytical model is proposed, based on the total free energy of a dot and substrate system. The theoretical minimum and natural dot sizes show the same trend with an increase of contact angle. The theoretical model is validated by the experimental results.


2020 ◽  
Vol 4 (1) ◽  
pp. 157-162
Author(s):  
mohanad AlAlwani ◽  

This paper summarizes the reality of teaching physics at the undergraduate level, in light of the challenges of reality and the future and keeping pace with the scientific development that the science of physics is constantly witnessing, as it sheds light on this reality through some suggestions that would advance and develop the process of teaching physics at the university level and for specialists In this science, whether from a theoretical, practical or applied point of view, from a theoretical point of view, to use modern technologies and develop courses by keeping pace with the scientific developments in the advanced international universities. As for the practical aspect, the laboratories should have computers that are used to draw curves and extract the results, and that these laboratories should be equipped with all that is required for the experiments, and that the work of these experiments is linked after the theoretical lectures. As for the practical aspect, which includes complex problems, it is better to divide students into groups to solve those problems as it is in practical experiments, and to announce to students the questions that should be solved a week before so that they are aware of the scientific material and ready for it.


2007 ◽  
pp. 86-94
Author(s):  
A. Manakov

The article provides theoretical analysis and evaluation of the timber auctions reforms in Russia. The author shows that the mechanism of the "combined auctions", which functioned until recently, is more appropriate from the theoretical point of view (and from the point of view of the Russian practice) as compared to the officially approved format of the English auction.


Chelovek RU ◽  
2020 ◽  
pp. 18-53
Author(s):  
Sergei Avanesov ◽  

Abstract. The article analyzes the autobiography of the famous Russian philosopher, theologian and scientist Pavel Florensky, as well as those of his texts that retain traces of memories. According to Florensky, the personal biography is based on family history and continues in children. He addresses his own biography to his children. Memories based on diary entries are designed as a memory diary, that is, as material for future memories. The past becomes actual in autobiography, turns into a kind of present. The past, from the point of view of its realization in the present, gains meaning and significance. The au-thor is active in relation to his own past, transforming it from a collection of disparate facts into a se-quence of events. A person can only see the true meaning of such events from a great distance. Therefore, the philosopher remembers not so much the circumstances of his life as the inner impressions of the en-counter with reality. The most powerful personality-forming experiences are associated with childhood. Even the moment of birth can decisively affect the character of a person and the range of his interests. The foundations of a person's worldview are laid precisely in childhood. Florensky not only writes mem-oirs about himself, but also tries to analyze the problems of time and memory. A person is immersed in time, but he is able to move into the past through memory and into the future through faith. An autobi-ography can never be written to the end because its author lives on. However, reaching the depths of life, he is able to build his path in such a way that at the end of this path he will unite with the fullness of time, with eternity.


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