Definition of Roofing Slate Lithotypes for an International Roofing Slate Classification

2020 ◽  
Vol 848 ◽  
pp. 48-57 ◽  
Author(s):  
Victor Cárdenes ◽  
Álvaro Rubio-Ordoñez ◽  
Vicente G. Ruiz de Argandona

The term “roofing slate” comprises all natural rocks that can be used for roofing. Some of the characteristics that define their performance as construction materials are water absorption, bending strength, mineral composition, and aesthetics. From a sustainability point of view, roofing slates also have the largest life expectancy and lowest carbon emissions of all covering materials. This work reviews the constructive characteristics of roofing slates, from technical data provided by producers from all over the world. These data, supported by the petrological characterization of several roofing slate samples, are used to propose a general classification for this special type of rock. Thus, roofing slates are sorted in twelve lithotypes, depending of their petrographical characteristics, defined by the color. The resulting classification is named International Roofing Slate Classification (IRSC), formally defined in this paper.

Author(s):  
Raffaele Di Gregorio ◽  
Alessandro Cammarata ◽  
Rosario Sinatra

The comparison of mechanisms with different topology or with different geometry, but with the same topology, is a necessary operation during the design of a machine sized for a given task. Therefore, tools that evaluate the dynamic performances of a mechanism are welcomed. This paper deals with the dynamic isotropy of 2-dof mechanisms starting from the definition introduced in a previous paper. In particular, starting from the condition that identifies the dynamically isotropic configurations, it shows that, provided some special cases are not considered, 2-dof mechanisms have at most a finite number of isotropic configurations. Moreover, it shows that, provided the dynamically isotropic configurations are excluded, the geometric locus of the configuration space that collects the points associated to configurations with the same dynamic isotropy is constituted by closed curves. This results will allow the classification of 2-dof mechanisms from the dynamic-isotropy point of view, and the definition of some methodologies for the characterization of the dynamic isotropy of these mechanisms. Finally, examples of applications of the obtained results will be given.


The article attempts to comprehend the essence and possibility of forming discourse competence among foreign and Russian students with simultaneous immersion in patriotic discourse. It is highlighted that the addition of the humanitarian series of “History of Civilizations” and “Features of Russian Civilization” to the educational process at the university creates the necessary pedagogical conditions for organizing a special linguo-ethno-cultural environment that forms active social interaction of authors within the framework of the medical and patriotic linguistic scenario. The authors of the article conducted a semantic and historical analysis of interpretations of the concept of “patriotism” that were studied from the point of view of traditional and liberal culture. The article presents the results of a socio-pedagogical study of students' perceptions of this concept. The article describes various theoretical and methodological approaches to the definition of the concepts of “discourse” and “discursive picture of the world” as well as psycholinguistic features of the method of semantic differential. Special attention in the article is paid to the typologies of discourse presented in the scientific literature. The authors of the article present the principle of genre and the principle of thematic correlation as the basis for distinguishing between types of discourse and highlight differences in language and discursive pictures of the world. The tasks of educators is to form not only purely medical discursive competence, but also to immerse the listener in “correctly” interpreted picture, saturated with verbal patterns that allow to create statements of patriotic content.


MANUSYA ◽  
2001 ◽  
Vol 4 (3) ◽  
pp. 80-96
Author(s):  
Stephen Evans

A review of recent literature advocating critical thinking as a necessary response to ‘globalizationʼ, gives no clear picture of what critical thinking is. Drawing on Kant and Hermeneutics, this paper proposes a critical definition of critical thinking as an understanding of its subject-matter which questions itself, and a characterization of critical thinking as the tension of standing within the subject-matter while holding it at a distance. Considered against a backdrop of concerns about ‘globalizationʼ, critical thinking is seen, not only as an intellectual method, but also as an existential engagement of the world.


2017 ◽  
Vol 21 (2) ◽  
pp. 243-281 ◽  
Author(s):  
Agostino Cera ◽  

Abstract: While putting forward the proposal of a “philosophy of technology in the nominative case,” grounded on the concept of Neoenvironmentality, this paper intends to argue that the best definition of our current age is not “Anthropocene.” Rather, it is “Technocene,” since technology represents here and now the real “subject of history” and of (a de-natured) nature, i.e. the (neo)environment where man has to live.This proposal culminates in a new definition of man’s humanity and of technology. Switching from natura hominis to conditio humana, the peculiarity of man can be defined on the basis of an anthropic perimeter, the core of which consists of man’s worldhood: man is that being that has a world (Welt), while animal has a mere environment (Umwelt). Both man’s worldhood and animal’s environmentality are derived from a pathic premise, namely the fundamental moods (Grundstimmungen) that refer them to their respective findingness (Befindlichkeit).From this anthropological premise, technology emerges as the oikos of contemporary humanity. Technology becomes the current form of the world – and so gives birth to a Technocene – insofar as it introduces in any human context its ratio operandi and so assimilates man to an animal condition, i.e. an environmental one. Technocene corresponds on the one side to the emergence of technology as (Neo)environment and on the other to the feralization of man. The spirit of Technocene turns out to be the complete redefinition of the anthropic perimeter.While providing a non-ideological characterization of the current age, this paper proposes the strategy of an ‘anthropological conservatism,’ that is to say a pathic desertion understood as a possible (pre)condition for the beginning of an authentic Anthropocene, i.e. the age of an-at-last-entirely-human-man.


2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Ana Moral ◽  
Elena Cabeza ◽  
Roberto Aguado ◽  
Antonio Tijero

Rice is one of the most abundant food crops in the world and its straw stands as an important source of fibres both from an economic and an environmental point of view. Pulp characterization is of special relevance in works involving alternative raw materials, since pulp properties are closely linked to the quality of the final product. One of the analytical techniques that can be used in pulp characterization is near-infrared spectroscopy (NIRS). The use of NIRS has economic and technical advantages over conventional techniques. This paper aims to discuss the convenience of using NIRS to predict Kappa number in rice straw pulps produced under different conditions. We found that the resulting Kappa number can be acceptably estimated by NIRS, as the errors obtained with that method are similar to those found for other techniques.


2019 ◽  
Vol 73 (4) ◽  
pp. 265-274
Author(s):  
Slavica Mihajlovic ◽  
Zivko Sekulic ◽  
Jovica Stojanovic ◽  
Vladan Kasic ◽  
Iroslav Sokic ◽  
...  

Quality of raw materials, including quartz sand and quartzite, varies from one deposit to another. Furthermore, the material quality determines in which industrial branches it can be used after certain preparation processes. Potential applications of quartz raw materials are: in the construction and refractory industry, ceramics and glass industry, then in metallurgy, foundry and also in production of water treatment filters. Geological investigations of the central Serbia region, in the Rekovac municipality, resulted in identification of occurrence of quartz sand ("Ursula") and quartzite ("Velika Krusevica"). Preliminary laboratory tests and characterization of the quartz sand size fraction -0.63+0.1 mm confirmed the possibility of applying this size fraction in the construction materials industry, while the quartzite can be used in refractory, glass and metallurgy industries. After determining the geological reserve of quartz sand "Ursula" and quartzite "Velika Krusevica", detailed investigations are required. Quality conditions from the aspect of chemical composition and physical properties of quartz sand and quartzite are mostly clearly defined by a special standard for this purpose. On the other hand, there are also application areas where standards does not exist, but users define their quality conditions. This example is with the application of quartz sand in the production of water glass. Chemical composition as well is not always the determining factor for the application of quartz raw material. For example, for quartz sand used for sandblasting, grain form is essential. From the economic analysis point of view, the prices of quartz raw materials vary depending on their chemical and physical properties. After all, what needs to be pointed out is the fact that these raw materials are very widespread in nature and that their exploitation is quite simple. After the raw material is excavated, it is stored and further sieved, washed, dried and processed according to customer requirements. All of these processes are cheaper than preparing, for example, limestone, and significaly cheaper than preparation of metal ores.


Author(s):  
Mikael Aktor

This article is a reflection on the specific character of religious assertations and religious arguments. The basic point of view is that these religious practices should not be investigated as isolated religious phenomena sui generis, but on the contrary, that they are conditioned by and derived from common linguistic and epistemological practices that relate to the concrete material world. Religious assertations join together finction and description of the world, whereas religious arguments refer todata which are either quasi-empiric (a holy scripture  for instance) or quasi-public (a mystical experience for instance). in four text examples these derivations are investigated in the light of a two-component definition of religion, which stresses the concept of an essential difference as well as the concept of a possibility of a passage to an fro between essentially differenct categories.


2020 ◽  
Vol 22 (3) ◽  
pp. 841-848
Author(s):  
V. O. Kuleshova

The article proposes a comprehensive methodology approach to terminological systems. The methodology involves several stages. The first one involves a semantic analysis. Then follows a structural model of the terminology in question based on the logical connections between objects and processes of a certain special field and their reflection in the professional language. Finally, the researcher discloses the pragmatic potential of terminology units and demonstrates their role in determining the position of the terminological system in the scientific view of the world. The research objective was to describe and apply this approach to the analysis of the terminology of photonic crystals. The study featured the terminology of photonic crystals. The terms were selected from several scientific books. The author employed the following methods: the method of semantic analysis, a cognitive approach to describing the structure of the terminology, and contextual analysis. The author revealed a close relationship between the internal form of the term and the sign. Understanding the internal form of the term makes it possible to determine the place of the term in the terminology, which guarantees it correct interpretation and use. The article introduces a convolved model of the terminological structure of photonic crystals and explains how the terms are organized within the terminological system and how the terminological system can be embedded in the scientific view of the world. The author highlighted the role of general terms in integrating terminological systems into the scientific view of the world and in the relationship between different terminological systems. The most accurate definition of the boundaries of the terminology is possible only in the context where the term can fully exercise its meaning.


2016 ◽  
Vol 34 (1) ◽  
pp. 74-79 ◽  
Author(s):  
Carlo Nicoletto ◽  
Silvia Santagata ◽  
Silvio Pino ◽  
Paolo Sambo

ABSTRACT: The Brassicaceae plants are among the most consumed vegetables in the world. They feature a large biodiversity, in which landraces and primitive cultivars still play a major role on the cultivation systems of many countries. Brassicas and especially broccoli are closely linked to antioxidant compounds that play a key role for human health. This experiment aimed to characterize some Italian unknown broccoli landraces from the antioxidant point of view. Five landraces named BF, BF4, BFT, BB and BS were evaluated. The total antioxidant properties of broccoli were significantly different among ecotypes and the higher values were recorded in BS and BF4. Total phenols showed the higher values in BF4 and concerning the ascorbic acid content found in the different ecotypes results can be summarized in three groups: the first one is represented by BB with higher values, the second one by BF4 and BS and then BF and BFT. BB represented the lower amount of hydroxycinnamic acids, whereas BF4 showed quite higher sulforaphane content (+95%) than other cultivars. The high content of phenolic acids, vitamin C and antioxidant compounds make these broccoli landraces, still little known, an important natural source of dietary antioxidant.


Food Research ◽  
2020 ◽  
Vol 4 (S1) ◽  
pp. 34-42 ◽  
Author(s):  
M.A. Abdullah ◽  
M.S.E. Azam

Entrepreneurship has become one of the vital activities for economic development. It is synonymous with job creation, innovation, improvement in the societal well-being and economic growth in developed and developing countries alike. There is great interest in entrepreneurship globally as well as in Malaysia. Over the past few years, many individuals, as well as families, are actively engaged with the small business. Also, in light of the 2013 GEM study, 12.7% of Americans are effectively occupied with beginning a business or are the proprietor/director of a business that is under three years of age. Simultaneously, the Halal industry, that represents the global Islamic economy, is the fastest-growing market in the world with $2.3 trillion market value. Halal entrepreneurs (Halalpreneurs) are the major contributors to this achievement as they constitute a significant portion of the total establishment in most of the Muslim countries. That is the reason Entrepreneurship has turned into a conventional term that depicts a wide range of practices that include being innovative, devilish and tricky. Entrepreneurship has been defined by many scholars, researchers, industry players, and academicians globally which have also been perceived in the same way by most of the economies around the world. However, the Islamic economy looks at the concept of ‘entrepreneurship’ in a different way and perceives it as ‘Halalpreneurship’. To define entrepreneurship in the halal industry, although, the term ‘Halalpreneurship’ is being used, surprisingly the term has not been defined properly yet. It is essential for the Muslim entrepreneurs to have a proper understanding of Halalpreneurship from Maqasid-al-Shariah perspective. Such point of view is crucial to justify the term in the Halal industry and differentiate from conventional entrepreneurs. On this context, this paper provides concept and definition of Halalpreneurship justifying from the perspective of Maqasid-al-Sharia’h. It also identifies the differences between Halalpreneurs and entrepreneurs using secondary resources available in the forms of literature, research papers, journal papers, articles, conference papers, online publications, etc. The findings of the study will clarify the concept of Halalpreneurship from Maqasid-al-Sharia’h perspective and recognize Halalpreneurs distinguished from conventional entrepreneurs.


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