scholarly journals A Fractal Description of Fluvial Networks in Chile: a Geography not as Crazy as Thought

2021 ◽  
Author(s):  
Francisco Martinez ◽  
Hermann Manriquez ◽  
Alberto Ojeda ◽  
Gabriel Olea
Keyword(s):  
Fractal Dimension ◽  
Point Of View ◽  
Drainage Area ◽  
Empirical Methods ◽  
The Real ◽  
Drainage Networks ◽  
Fractal Properties ◽  
Semi Empirical ◽  
Fluvial Network ◽  
Fractal Description

Chilean geography is highly variable, not only from a climatic and hydrological point of view, but also a morphological one, showing unpredictable natural patterns with marked contrasts throughout the country, for which sometimes it is considered as a "crazy" geography. In this paper we have investigated this apparent disorganized character by exploring the fractal properties of fluvial networks extracted from basins distributed across the continental territory. Analytical and semi-empirical methods were applied, finding striking patterns of organization in the distributions of Horton parameters and the fractal dimension of the drainage networks. Fractal dimension reveals to be quite dependent on the drainage area of each unit, showing clear groupings by tectonic and climatological factors. Such dimension reveals to be an important geomorphic parameter, if not the only one able to capture the real morphology of a fluvial network. From our results and despite the diversity of landforms, hydrological, climatic and tectonic conditions, Chilean’s geography is perhaps not as crazy and disorganized as believed.

scholarly journals Modified Catalysts and Their Fractal Properties

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1518
Author(s):  
Gianina Dobrescu ◽  
Florica Papa ◽  
Razvan State ◽  
Monica Raciulete ◽  
Daniela Berger ◽  
...  
Keyword(s):  
Fractal Dimension ◽  
Heterogeneous Catalysis ◽  
Fractal Theory ◽  
Fractal Dimensions ◽  
Active Surface ◽  
Point Of View ◽  
Surface Sites ◽  
Fractal Properties ◽  
Active Surface Sites ◽  
Scientific Results

Obtaining high-area catalysts is in demand in heterogeneous catalysis as it influences the ratio between the number of active surface sites and the number of total surface sites of the catalysts. From this point of view, fractal theory seems to be a suitable instrument to characterize catalysts’ surfaces. Moreover, catalysts with higher fractal dimensions will perform better in catalytic reactions. Modifying catalysts to increase their fractal dimension is a constant concern in heterogeneous catalysis. In this paper, scientific results related to oxide catalysts, such as lanthanum cobaltites and ferrites with perovskite structure, and nanoparticle catalysts (such as Pt, Rh, Pt-Cu, etc.) will be reviewed, emphasizing their fractal properties and the influence of their modification on both fractal and catalytic properties. Some of the methods used to compute the fractal dimension of the catalysts (micrograph fractal analysis and the adsorption isotherm method) and the computed fractal dimensions will be presented and discussed.

Entre Filosofia e Medicina

1998 ◽  
Vol 6 (11) ◽  
pp. 63-85
Author(s):  
António Pedro Mesquita ◽  
Keyword(s):  
Clinical Practice ◽  
Present Article ◽  
Point Of View ◽  
The Other ◽  
Empirical Methods ◽  
General Survey ◽  
Ancient Medicine ◽  
The Real ◽  
Other Hand ◽  
The One

Any analysis of the Hippocratic anthropology must begin by taking a stand on two quite different issues. On the one hand, it must ascertain a precise and definite meaning of the word ‘Hippocratic’ in such a context, considering the historical problems surrounding the 'real' Hippocrates and the doctrinal heterogeneity of the Hippocratic collection. On the other hand, it must justify the very possibility of an anthropology within the Hippocratic tradition, by accommodating it with the obvious animadversion that its most representative works show towards any philosophical or speculative inquiry. The first problem can be solved by purely historical means, viz. by restricting the object of analysis to the texts that admittedly represent the views of the Hippocratic school. Not so with the second one, which constitutes the truesignificant problem from a philosophical point of view and with which the present article is therefore concerned. After discussing the texts where the question on the nature of man is posed (Ancient Medicine XX, On the Nature of Man I-IV), a general survey of the Hippocratic conception of the theoretical and scientific foundations of clinical practice is given, in order to understand the Statement according to which it is to medicine, and not to philosophy, that an answer to such a question truly belongs. From such a survey a thesis arises: that, according to the Hippocratic perspective, the appropriate answer to the question on the nature of man is not the one that seeks to determine what man is, even by means of the empirical methods of medicine, but the one that reshapes the question itself, thereby replacing the philosophical focus on the knowing of man, for the sake of knowledge, by the clinical focus on the caring of man, for the sake of man himself.

Semi-empirical methods versus dynamic load testing in piles

Geotecnia ◽  
2015 ◽  
Vol 135 ◽  
pp. 89-113
Author(s):  
Jean Felix Cabette ◽  
◽  
<br>Heloisa Helena Silva Gonçalves ◽  
<br>Fernando Antônio Marinho ◽  
◽  
...  
Keyword(s):  
Dynamic Load ◽  
Load Testing ◽  
Empirical Methods ◽  
Semi Empirical

Art. XIX.—An old Hebrew Romance of Alexander

1897 ◽  
Vol 29 (3) ◽  
pp. 485-549
Author(s):  
M. Gaster
Keyword(s):  
Middle Ages ◽  
Early Period ◽  
Point Of View ◽  
The Other ◽  
The West ◽  
The Real ◽  
History Of ◽  
Bibliographical Information ◽  
Ancient Times ◽  
Great Mass

More marvellous and more remarkable than the real conquests of Alexander are the stories circulated about him, and the legends which have clustered round his name and his exploits. The history of Alexander has, from a very early period, been embellished with legends and tales. They spread from nation to nation during the whole of the ancient times, and all through the Middle Ages. Many scholars have followed up the course of this dissemination of the fabulous history of Alexander. It would, therefore, be idle repetition of work admirably done by men like Zacher, Wesselofsky, Budge, and others, should I attempt it here. All interested in the legend of Alexander are familiar with those works, where also the fullest bibliographical information is to be found. I am concerned here with what may have appeared to some of these students as the bye-paths of the legend, and which, to my mind, has not received that attention which is due to it, from more than one point of view. Hitherto the histories of Alexander were divided into two categories; the first were those writings which pretended to give a true historical description of his life and adventures, to the exclusion of fabulous matter; the other included all those fabulous histories in which the true elements were smothered under a great mass of legendary matter, the chief representative of this class being the work ascribed to a certain Callisthenes. The study of the legend centred in the study of the vicissitudes to which this work of (Pseudo-) Callisthenes had been exposed, in the course of its dissemination from the East, probably from its native country, Egypt, to the countries of the West.

Excited-state localization and energy transfer in pyrene core dendrimers with fluorene/carbazole as the dendrons and acetylene as the linkages

2016 ◽  
Vol 18 (5) ◽  
pp. 4134-4143 ◽  
Author(s):  
Linyin Yan ◽  
Yan Wan ◽  
Andong Xia ◽  
Sheng Hien Lin ◽  
Ran Huang
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Theoretical Model ◽  
Empirical Methods ◽  
Multi Scale ◽  
Td Dft ◽  
Semi Empirical

Multi-scale theoretical model and spectra simulation for dendrimers combining TD-DFT/DFT and semi-empirical methods.

scholarly journals Vuoret ja kaupunki vastakohtaisina tiloina Alisa Ganijevan teoksissa

2016 ◽  
pp. 7-22
Author(s):  
Anni Lappela
Keyword(s):  
Central Element ◽  
Point Of View ◽  
The Novel ◽  
Way Of Life ◽  
The Real ◽  
Key Concepts ◽  
The City ◽  
Geographical Space

Mountains and City as Contrary Spaces in the Prose of Alisa Ganieva I analyze Alisa Ganieva’s novel Prazdnichnaia gora (2012) and her novella Salam tebe, Dalgat! (2010) from a geocritical (Westphal, Tally) point of view. Ganieva was born in 1985 in Moscow, but she grew up in Dagestan, in North Caucasia. Since 2002, she has lived in Moscow. All Ganieva’s novels are set in present-day Dagestan, not only in the capital Makhachkala but also in the countryside.  I study the ways the two main spaces and main milieus, the mountains and the city, oppose each other in Prazdnichnaia gora. I also analyze how this opposition constructs the utopian and dystopian discourses of the novel. In this high/low opposition, the mountains appear as the utopian place of a better future, and the city in the lowlands is depicted as a dystopian place of the present-day life. The texts’ multilayered time is also part of my analysis, which follows Westphal’s idea of the stratigraphy of time. Furthermore, the mountains are associated with the traditional way of life and the Soviet past. In this way, the mountains have two kinds of roles in the texts. Nevertheless, the city is a central element of the postcolonial dystopian discourse of Prazdnichnaia gora. In my opinion, Ganieva’s texts problematize referentiality, one of the key concepts of geocriticism. Whilst the city tends to be very referential, the mountains escape the referential relationship to the “real” geographical space.

scholarly journals VERIFICAÇÃO DO DESEMPENHO DAS ESTACAS INJETADAS AUTOPERFURANTES EXECUTADAS EM SOLOS ARENOSOS PARA CONSTRUÇÃO DE USINA EÓLICA

2017 ◽  
Vol 13 (2) ◽  
Author(s):  
Rodrigo Cerqueira Rogerio
Keyword(s):  
Structural Characteristics ◽  
Load Capacity ◽  
The Self ◽  
Executive Processes ◽  
Empirical Methods ◽  
Deep Drilling ◽  
Load Tests ◽  
Different Diameters ◽  
Semi Empirical

RESUMO: Apresenta-se neste trabalho a solução adotada para execução das fundações do Parque de Usina Eólica localizado no Ceará, com a utilização das estacas injetadas autoperfurantes, executadas em presença de solos arenosos. No qual consiste em perfurar o solo com altíssima velocidade por rotação e “pull down”, através da injeção simultânea de nata de cimento com medias pressões. Ocasionando na estaca um diâmetro final que pode obter o dobro do bit de perfuração, de acordo com o tipo de solo, gerado pelo efeito do jato da nata de cimento. Detalhando os processos executivos, verificando os aspectos técnicos e operacionais, para melhor compreender as características estruturais deste elemento. De forma a verificar “in situ” o desempenho deste novo tipo de fundação profunda, foram realizadas provas de carga, em estacas com diferentes diâmetros e comprimentos, realizadas em perfis estratigráficos de solos arenosos, para melhor avaliação de sua capacidade de carga. Analisando-se os ensaios das provas de carga interpretados a base da extrapolação da curva carga versus recalque e das previsões da capacidade de carga, obtidas por meio dos métodos semi-empíricos de correlação com ensaios de penetração (SPT), avaliando os padrões de execução desta tipologia de estaca injetada para comunidade geotécnica. ABSTRACT: This paper aims to establish the selected solution to except the foundations of the Wind Energy Park in Ceará (Brazil), with an executive methodology of the self-drilling injection piles framed in loco in Sandy soil. In which the soil drilling is done with the highest speed by rotation and pull down, through the simultaneous injection of grouting with medium pressures. This kind of drilling causes in the pile a final diameter that can get the double bore bit, according to the type of soil, done by the grouting blast. The executive processes are detailed as a whole, and also presenting the pile materials composition, in order to understand the structural characteristics of this element. To verify the performance of this new kind of deep drilling, instrumentations were done: settlement control and load tests in constructions with different structural characteristics, in self-drilling injected piles with different diameters and length, done in stratigraphical sandy, for a better evaluation of its load capacity. Analyzing the essays of load tests interpreted in the basis of curve extrapolation load versus settlement and the previsions of the load capacity, obtained by semi-empirical methods correlating with the penetrations methods (SPT), offering information to the geotechnical community.

scholarly journals Apparent L-Falsity and Actual Logical Structures

Problemos ◽  
2020 ◽  
Vol 97 ◽  
pp. 114-122
Author(s):  
Miguel López-Astorga
Keyword(s):  
The State ◽  
Point Of View ◽  
Main Difficulty ◽  
The Real ◽  
Logical Structures

In 2012, Orenes and Johnson-Laird found interesting results from the cognitive point of view but problematic if analyzed under methods such as the semantic one of extension and intension presented by Carnap. The main difficulty in this way is that Orenes and Johnson-Laird showed that people tend to accept, in the case of certain inferences, conclusions that, by themselves, are, according to the aforementioned semantic method, false in absolutely all of the state-descriptions that can be imagined. However, in this paper, a way to overcome that difficulty is proposed. That way is based upon the idea that the real logical forms of the conclusions accepted by the participants in Orenes and Johnson-Laird’s experiments were not the apparent ones, but they corresponded to other very different structures that can be true in some state-descriptions.

scholarly journals STRUCTURAL AND ELECTRONIC PROPERTIES OF BRIDGED BITHIOPHENE S-OXIDES (BTO) WITH S, S=O, O, SiH2 and BH2 BRIDGE: SEMI-EMPIRICAL AND AB INITIO STUDY

2010 ◽  
Vol 18 (18) ◽  
pp. 1-10
Author(s):  
Banjo Semire ◽  
Isaiah Ajibade Adejoro ◽  
Olusegun Ayobami Odunola
Keyword(s):  
Density Functional Theory ◽  
Thermodynamic Properties ◽  
Ab Initio ◽  
Density Functional ◽  
Ab Initio Study ◽  
Empirical Methods ◽  
Functional Theory ◽  
Structural And Electronic Properties ◽  
Semi Empirical ◽  
Good Agreement

In this paper, we theoretically studied the geometries, stabilities, electronic and thermodynamic properties of bridged bithiophene S-oxide (BTO-X) derivates (with X = BH2, SiH2, S, S=O, and O) by using semi-empirical methods, ab-initio, and Density functional theory. The geometries and thermodynamic parameters calculated by PM3 were in good agreement with that of B3LYP/6-31G(d). The bandgap calculated by B3LYP/6-31G(d) ranged from 3.94eV (BTO-O)-3.16eV (BTO-BH2). The absorption λmax calculated suing B3LYP/6-31G(d) shifted to longer wavelength with X=BH2, SiH2, and S=O due to enhancement of π-conjugated system whereas, BTO-S and BTO-O shifted to shorter wavelengths as compared to dimmer thiophene S-oxide (2TO).

scholarly journals Representação e ciências sociais

2016 ◽  
Vol 1 (1) ◽  
pp. 109-126
Author(s):  
Drance Elias da Silva
Keyword(s):  
Social Sciences ◽  
Knowledge Representation ◽  
Human Life ◽  
Point Of View ◽  
General View ◽  
Dominant Culture ◽  
The Real ◽  
The Social ◽  
Long Time ◽  
Expression Form

This Article may be situated within the rapport field between Philosophy and Social Sciences, at the search regarding to the concept concerning the Representation. Regarding to Philosophy, under a general view, the concept, concerning Representation, has been, since a long time, understood as a trail which one would get througl reaching to the real and true ones. Representation, as the thought contents expression form had not been known departing from Philosophy as a barrier against the objectivity concerning the knowledge. Representation, in its source, has been constituting itself a cognictive, inmanent reflection, related to the conscience inner subjectivity. But departing from the episthemological point of view, it has been not so easy for the campus concerning the Culture Sciences as a totality. In the theory regarding to knowledge, the Social Sciences campus and, more specifically, in the human life Symbolic dimension constitutive aspects, it has been, often, accepted negatively as an entry door for the histotical social reality. Nowadays, one may conclude that the contents concerning the Culture are deeply rooted within the histotical reality, which may present new dimension the reading regarding to the Symbolical side concerning the human life, under the view regarding to the unseen aspect, such as the intellectualistic Western dominant Culture allows understanding the way which could be in.

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