scholarly journals The perturbations of the Bielid meteors

In the calculations, the results of which are embodied in this paper, it is assumed that in the apparition of the Bielid Meteors noted in November, 1885, we have an observation of the main part of the stream. It is also assumed that the periodic time of the stream is 6⅔ years, as appears to be now the general opinion of the chief authorities on the subject, and which agrees closely with the periodic time found for the associated comet. On these assumptions we ought again to encounter the central part, or at least a neighbouring segment of the stream, close to the central part, in November of the present year. It accordingly became a matter of interest to determine the perturbations to which the segment of the meteor stream, encountered in November, 1885, has been subjected in the interval, in order to ascertain the possibility or otherwise of an encounter with the same segment next November, especially as it was known that this segment of the stream was in close proximity to Jupiter during 1900-01.

2017 ◽  
Vol 13 (3) ◽  
pp. 32-40 ◽  
Author(s):  
A.D. Tikhonova ◽  
N.V. Dvoryanchikov ◽  
A. Ernst-Vintila ◽  
I.B. Bovina

The main purpose of the presented article is to reveal the potential of social psychological knowledge for the analysis of radicalisation of young people. In the introduction, the features of socialisation in the modern world are discussed. Special attention is drawn to the role of the Internet in the socialisation of adolescents and young people. It is noted that the dominance of audiovisual information contributes to the reduction of reflexivity and promotes the so-called clip thinking, which has become an integral characteristic of adolescents and young people. It is emphasized that life in the modern society is associated with a number of changes taking place simultaneously at different levels, and uncertainty has become its important feature. Extremism and radicalisation are considered as a reaction to uncertainty, a way to overcome it. The main part of the article is devoted to the analysis of models of radicalization describes in various works. Finally, perspectives of further investigation into the subject are outlined.


2020 ◽  
Vol 8 (2) ◽  
pp. 97-111
Author(s):  
Patryk Bukowski

According to the title, the subject of this article is the activity of Frontex (European Border and Coast Guard Agency) on the Western Balkan route during the migrant crisis, the escalation of which took place in mid-2015. The main part of the text has been divided into four parts. In the first part of the article, the author briefly described the genesis of Frontex and its current activity in the normative perspective. In the second part, the author characterised the determinants of the migrant crisis, focusing on the challenges for the European Union which the crisis generated. In the third part, the author described the course of the Western Balkan route and analysed statistical data on the population migrating that route. In the fourth and last part, the author analysed Frontex’s activity on the Western Balkan route, describing the determinants of the actions taken.


2021 ◽  
Vol 150 (3) ◽  
pp. 1-23
Author(s):  
Katarzyna Śledziewska ◽  
Renata Włoch

In this article we focus on identifying the specificity of digital transformation within the public sector. The aim of the article is to present the main mechanisms resulting from the introduction of digital innovations that have changed the functioning of the public sector. Starting from a discussion on the technological requirements of digital transformation, we briefly characterise the use of computers and the Internet in public administration, resulting in the development of e-services and administration. The main part of the article is devoted to discussing the specificity of the implementation of the new digital technologies in public administration, focusing mainly on artificial intelligence and blockchain technologies. Our thesis is that the impact of innovative digital technologies on the operation standards and structure of public administration should be analysed through the prism of interrelated mechanisms of datafication and platformisation, characteristic for the digital economy. The adopted methodology, which is based on an analysis of the subject literature and an analysis of new technology implementations in public administration in EU countries, indicates the pilot, random and non-transformational nature of these implementations, partly due to the lack of well-established methodologies to study and assess the maturity of digital transformation within the public sector.


Author(s):  
Stefanie Sieber ◽  
Andreas Henrich

The merging of knowledge management and hybrid learning has gained more and more attraction and has been put in the focus of interests lately, for the simple reason that both areas can benefit from each other. As a result, this chapter deals with knowledge management for hybrid learning. This chapter begins with a short introduction, followed by a brief clarification showing our understanding of hybrid learning. Afterwards, knowledge and associated attributes are defined precisely – definitions are derived and taxonomies for knowledge are described. This section closes with a first reflection on knowledge in the context of hybrid learning. Subsequently, the authors take a closer look at knowledge management by introducing different schools of thought and models for knowledge management. Opportunities to delve deeper into the subject individually are offered passim. The main part of the chapter provides a comprehensive view of knowledge management for hybrid learning. The described features range from general conclusions to theoretical aspects, exemplary projects, and finally practical aspects – previous deliberations are brought together, current insights concerning the research perspective are described and tools as well as techniques which foster knowledge management for hybrid learning are presented. Finally, a critical reflection as well as an outlook and some thoughts concerning future issues conclude this chapter.


1916 ◽  
Vol 2 (2) ◽  
pp. 268-319 ◽  
Author(s):  
A. E. Peake
Keyword(s):  
The West ◽  

I have chosen for the subject of my address a description of the excavations carried out at Grime's Graves by Mr. A. Leslie Armstrong and myself in the autumn of 1915. The work consisted in the digging over of four new floors, a description of which will form the main part of my paper. We also re-examined the mass of material left on three of the older floors excavated in 1914, viz., 3, 4, and 13, and devoted some time to searching the field which lies to the west of the plantation, which, in spite of many years' examination, still yields quantities of new implements. I have included, too, a description of some of the implements from a zone near Botany Bay, from which, in 1914, I obtained a number of pieces. This station lies about a mile on the Brandon side of the plantation, and is probably the ploughed-over site of some pits of similar date.Owing to the kindness of some members of the Society, viz., Messrs. W. G. Clarke, H. H. Halls, R. H. Chandler, and the Rev. H. G. O. Kendall, I have been able to figure and describe a number of fine implements which clearly belong to the same culture—found either on the field or on the surface of the Graves, and these, together with various specimens found on these spots by Mr. Armstrong and myself, are dealt with separately.


1824 ◽  
Vol 114 ◽  
pp. 45-49 ◽  

That a free, or at least an unsaturated acid usually exists in the stomachs of animals, and is in some manner connected with the important process of digestion, seems to have been the general opinion of physiologists till the time of Spallanzani. This illustrious philosopher concluded, from his nume­rous experiments, that the gastric fluids, when in a perfectly natural state, are neither acid nor alkaline. Even Spallanzani, however, admitted that the contents of the stomach are very generally acid ; and this accords not only with my own observation, but with that, I believe, of almost every indivi­dual who has made any experiments on the subject. With respect to the nature of this acid, very various opinions have been entertained. Some of the older chemists seem to have considered it as an acid, sui generis ; by others it was supposed to be the phosphoric, the acetic, the lactic acid, &c. No less various have been the opinions respecting After I had discovered the principal fact related in this paper, I was surprized to find how nearly Scopoli had come to the same conclusion. He did not indeed come to the conclusion, as far as I can ascertain, that free muriatic acid exists in the stomach, but he advanced the opinion, that the muriatic acid, in union with ammonia, found in such abundance in the stomach of ruminating animals, is secreted by that organ itself. The only account of Scopoli’s experiments I have seen is in Johnson’s Animal Chemistry, i. 183. its origin and use ; some supposing that it is derived from the stomach itself, and is essential to the digestive process; others, that it is derived from the food, or is a result of fementation, &c. ; in short, there seems to be no physiological subject so imperfectly understood, or concerning which there has been such a variety of opinions.


1890 ◽  
Vol 35 (4) ◽  
pp. 947-954 ◽  
Author(s):  
A. Crichton Mitchell

Until a few years ago it was the general opinion among metallurgists that the presence of manganese in steel exceeding the proportion of 1 per cent, is prejudicial to the value of the steel, inasmuch as a higher percentage of manganese has the effect of lowering markedly its tensile strength and toughness. But in 1884, Messrs Hadfield & Company, of the Hecla Steel Works, Sheffield, exhibited, at a meeting of the Institute of Mechanical Engineers, a number of samples of steel containing upwards of 10 to 15 per cent, of manganese, and submitted the results of experiments, which showed that the samples were, in point of tensile strength and hardness, in no way inferior to steel. Again, in 1888, Mr R. A. Hadfield read to the Institute a paper on the subject, giving the details of a large number of tests, which brought to light some interesting mechanical properties of alloys of manganese and iron. Since its introduction, these alloys (and particularly that containing 10 to 15 per cent, of manganese, known as “manganese-steel”) have been studied by several physicists, and further peculiarities have been found. It appeared desirable that the thermal conductivity of so peculiar a substance should be investigated. The present paper is an account of experiments made in the Physical Laboratory, Edinburgh University, with a view to the determination of its thermal conductivity. In the reduction of such experiments a knowledge of the specific heat is necessary, hence there is also given an account of experiments whereby the specific heat was determined.


2018 ◽  
Vol 24 ◽  
pp. 11-77
Author(s):  
Krzysztof Frankowicz

Renaissance book collection of Stanislaus Rosarius The subject of the paper is the library of Stanislaus Rosarius (1520–1572). This doctor of philosophy and medicine, a graduate of the University of Padua who socialized with a number of key figures of the Polish Renaissance, was a highly regarded physician and an eminent member of the Calvinist congregation in Krakow. Being a prosperous practitioner, during his entire career he allocated part of his income to purchasing books for his private library. In total, Rosarius amassed almost 400 volumes, which made his library one of the largest of its kind at that time, not just within the royal capital of Poland. The library’s impressive range distinctly shows the broadness of the humanistic interests of its owner. As its main part, the article comprises two inventories of Rosarius’ books, one compiled in 1572 and the other in 1583. The present publication lists all entries from both the manuscripts, amply demonstrating the unique character of the collection as well as providing a sound basis for further detailed studies on Renaissance book collections in the possession of Krakow burghers.


Author(s):  
Greger Andersson ◽  
Roland Spjuth ◽  
Fredrik Wenell

The subject that is examined in this article is how young Christians in Swedish Charismatic and Evangelical churches talk about their faith. The study takes its point of departure in Charles Taylors suggestion that both believers and non-believers in the Western world live in a “secular age” and that this affects the conditions for religious beliefs. Taylors reasoning as well as some American and Swedish studies about young believers are presented in the first part of the article. The main part consist of a presentation of two focus group interviews with young adults. In a final section the interviews are discussed in relation to earlier research. The authors argue that the interviewees emphasize the personal and the authentic, and that it is vital to have “a relation with Jesus”. They refer to, and long for, charismatic experiences but are also searching for a mature faith and an acceptance of “ups and downs” in their spiritual life. Although they shy traditional expressions and admit that they find certain dogmas difficult to understand, their belief offers them a certain “wholeness” in life. They are unhappy about the stereotypes about Christians they encounter in society but want to share their beliefs through testimony and a loving life style. Ethics, in the form of love and tolerance rather than rules, is very important. However, this is a problem not least in relation to issues about homosexuality. Finally, the au- thors note, that the church, or groups within the church, are salient for these Christians.


2019 ◽  
Vol 808 ◽  
pp. 9-14
Author(s):  
Jan Sestak ◽  
Monika Utěšená ◽  
Radka Pernicova

The paper deals with the properties, quality and durability of the exposed concrete. The main part of this paper are characteristic of architectural (sometimes called visible or naked) concrete and the criterion of the quality evaluation of the performed work. This is mainly the colour balance of the subject area, the quantity and the size of the pores, the quality of the raw material and the surface structure. Achieving the quality of architectural concrete is considerably more technologically demanding compared with conventional concrete. This is reflected also in its cost. In conclusion, the problems of surface layers of architectural concrete are summarized. Especially environments can cause faster degradation, reducing the lifetime of the whole construction, but also pointing to one of the main problems in construction, which is technological discipline.


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