scholarly journals On the laws which regulate the absorption of polarized light by doubly refracting crystals. By David Brewster, LL. D. F. R. S. Lond. and Edinb. In a letter addressed to the Right Hon. Sir Joseph Banks, Bart. G. C. B. P. R. S

1833 ◽  
Vol 2 ◽  
pp. 104-105
Keyword(s):  
Polarized Light ◽  
The Other ◽  
Double Refraction ◽  
Pink Colour ◽  
The One ◽  
The Right ◽  
Number Of Particles

In examining the polarizing structure of acetate of copper, the author’s attention was drawn to certain changes of colour exhibited by its crystal, when exposed in different positions to polarized light; and as these were independent of the thickness of the plate, and of any analysis of the transmitted pencil, he was induced to regard them as a new affection of light, ascribable to the absorption of the homogeneous tints forming the compound colour of the crystal. Dr. Brewster, therefore, collected a variety of coloured crystals, with a view to examine the phenomena which they presented, when cut at different angles with the axis, and when exposed in different positions to polarized light. The details of this examination are next given; and as the property of transparent bodies, by which they detain and assimilate to their own substance a portion of the rays which penetrate them while the rest are freely transmitted, is related to the axes of double refraction, the author first describes the phenomena presented by crystals of one axis, and then explains the modifications which they undergo when the number of axes is increased. It appears from these investigations that the colouring particles of crystals, instead of being indiscriminately dispersed throughout their mass, have an arrangement related to the ordinary and extraordinary forces which they exert upon light. In some cases, the extraordinary medium appeared to be tinged with the same kind and number of colouring particles as the ordinary medium; but in other cases, in the same mineral, the extraordinary medium was either tinged with a different number of particles of the same colour, or with a colouring matter entirely different from that of the ordinary medium. In some specimens of topaz the colouring matter of the one medium was more easily discharged by heat than that of the other, one of the pencils being yellow and the other pink : hence it is a mistake to suppose that in converting yellow topazes into pink by heat, the former colour is changed into the latter; the fact being, that the yellow is discharged by heat, thus leaving the pink unimpaired. Hence it may be ascertained beforehand whether a topaz will receive a pink colour by heat; for if that colour exist in one of its images, seen by exposing it to a polarized ray, we may predict the success of the experiment.

scholarly journals On the action of crystallized bodies on homogeneous light, and on the causes of the deviation from Newton’s scale in the tints which many of them develope on exposure to a polarized ray

1833 ◽  
Vol 2 ◽  
pp. 122-123
Keyword(s):  
Polarized Light ◽  
The Other ◽  
Angular Deviation ◽  
Biot’S Theory ◽  
Double Refraction ◽  
Biot's Theory ◽  
The Law ◽  
The One ◽  
Polarization Of Light

When Malus published his discovery of the polarization of light the list of doubly-refracting crystals was small; and as the most remarkable of them possessed only one axis of double refraction, it Was presumed that the law discovered by Huyghens, applicable to that one, might hold good in all; but the discovery of crystals with two axes of double refraction has proved the fallacy of such generalization, and rendered new and extensive investigations necessary. There are two modes of conducting observations on double refraction and polarization; the one turns upon immediate observation of the angular deviation of the extraordinary pencil, the other depends upon the separation of a polarized ray into complementary portions by the action of a crystallized lamina. After noticing the advantages of the latter, Mr. H. observes, that to render observations on the tints developed by polarized light available, they must be comparable to each other; hence the importance of discovering the existence and tracing the laws of those causes which operate to disturb their regularity. In the author’s first inquiries on the polarization of light, he was Struck by the great deviation from the succession of colours in their laminæ, as observed by Newton, which many crystals exhibit when cut into plates perpendicular to one of their axes; and finding this phenomenon unconnected with irregularities in their thickness or polish, and uniformly repeated in different and perfect specimens, he was led to inquire into their causes, especially as they appeared to form an unanswerable objection to M. Biot’s theory, which perfectly explains the tints in crystals with one axis.

scholarly journals Experiments on the influence of magnetism on polarized light

1851 ◽  
Vol 5 ◽  
pp. 741-742
Keyword(s):  
Polarized Light ◽  
Middle Part ◽  
The Other ◽  
Current Pass ◽  
Magnetic Action ◽  
Pass Through ◽  
The One ◽  
The Right ◽  
Academy Of Sciences ◽  
Contrary Direction

The object of this notice is to communicate some recent experi­ments on diamagnetism, and particularly on the influence of mag­netism on polarized light. The following extracts are in the words of the author :— The apparatus I employed in these experiments was an electro­magnetic apparatus invented by M.Rumkorf, and described by M.Biot at a meeting of the Academy of Sciences of Paris, and consisting of a powerful electro-magnet, of which the soft iron cylinder is traversed by a hole in the direction of the length of the axis, through which hole the ray of polarized light is made to pass; and the voltaic cur­rent which I employed on this occasion was that of seven pair of Grove’s construction. I made my first experiment with a piece of heavy glass, which I received from Faraday himself. In order to assure myself of the exact amount of rotation induced by magnetic action, I caused the ray of light, before it reached the heavy glass , to pass through the system invented by M. Soleil, consisting of two equal plates of perpendicular quartz, placed side by side; the one turning to the right, the other to the left. I ascertained, first of all, the rotation produced by making the current pass sometimes in one direction, and sometimes in the other ; the two rotations, one to the right, the other to the left, thus produced, were exactly the same. Then I compressed slightly the middle part of the piece of heavy glass, in the same manner as one compresses pieces of glass. I was then obliged to turn the eyepiece in a certain direction in order to restore the image to its first condition; in my experiments I always had to turn it, after compression, towards the right. I next made the current pass, first in one direction, then in the other. The ge­neral facts which I have observed constantly and without exception are the following :— The rotation produced by the magnet on the com­pressed piece of heavy glass is not the same to the right as it is to the left: the rotation produced by the magnet is considerably greater in the direction of the rotation produced by compression than it is in the contrary direction: the rotation produced by the magnet on the com­pressed heavy glass, and in the direction of the rotation produced by the compression, is greater than that produced by the same magnet on glass which has not been compressed, and the rotation in the contrary direc­tion is less. The following are the numerical results . “In one experiment I obtained on a piece of heavy glass not com­pressed, 3° of rotation to the right or to the left, according to the direction of the current: on slightly compressing the glass, I had to turn to the right the eyepiece to 4°, 5°, and even to 8° in order to restore the image to its first condition. In closing the circuit, the rotation produced in the same direction as that due to compression wras 3½° or 4°, while the rotation produced in the contrary direction was from 2° to 1½°. On ceasing to compress the glass, I obtained the same phenomena as I had observed before the compression.

Challenges of Media Education Standards in Georgia

2017 ◽  
Vol 2 (2) ◽  
Author(s):  
Marine Vekua
Keyword(s):  
Working Conditions ◽  
Teaching Methods ◽  
International Standards ◽  
The Other ◽  
Historical Background ◽  
Journalism Education ◽  
Education Standards ◽  
Modern Media ◽  
The One ◽  
The Right

The main goal of this research is to determine whether the journalism education of the leading media schools inGeorgia is adequate to modern media market’s demands and challenges. The right answer to this main questionwas found after analyzing Georgian media market’s demands, on the one hand, and, on the other hand, differentaspects of journalism education in Georgia: the historical background, development trends, evaluation ofeducational programs and curricula designs, reflection of international standards in teaching methods, studyingand working conditions.

The Taubman/Golandsky Approach to the Violin

Public Voices ◽  
2016 ◽  
Vol 12 (2) ◽  
pp. 7
Author(s):  
Sophie Till
Keyword(s):  
The Other ◽  
Technical Approach ◽  
Piano Technique ◽  
Pedagogical Approach ◽  
New Developments ◽  
Body Of Knowledge ◽  
Music Making ◽  
Helping Others ◽  
The One ◽  
The Right

Three years ago Sophie Till started working with pianist Edna Golandsky, the leading exponent of the Taubman Piano Technique, an internationally acclaimed approach that is well known to pianists, on the one hand, for allowing pianists to attain a phenomenal level of virtuosity and on the other, for solving very serious piano-related injuries. Till, a violinist, quickly realized that here was a unique technical approach that could not only identify and itemize the minute movements that underlie a virtuoso technique but could show how these movements interact and go into music making at the highest level. Furthermore, through the work of the Golandsky Institute, she saw a pedagogical approach that had been developed to a remarkable depth and level of clarity. It was an approach that had the power to communicate in a way she had never seen before, despite her own first class violin training from the earliest age. While the geography and “look” on the violin are different from the piano, the laws governing coordinate motion specifically in playing the instrument are the same for pianists and violinists. As a result of Till’s work translating the technique for violin, a new pedagogical approach for violinists of all ages is emerging; the Taubman/Golandsky Approach to the Violin. In reflecting on these new developments, Edna Golandsky wrote, “I have been working with the Taubman Approach for more than 30 years and have worked regularly with other instrumentalists. However, Sophie Till was the first violinist who asked me to teach her with the same depth that I do with pianists. With her conceptual and intellectual agility as well as complete dedication to helping others, she has been the perfect partner to translate this body of knowledge for violinists. Through this collaboration, Sophie is helping develop a new ‘language’ for violinist that will prevent future problems, solve present ones and start beginners on the right road to becoming the best they can be. The implications of this new work for violinists are enormous.”

scholarly journals MAPPING AND ENHANCING DESIGN STUDIES WITH PSI META-THEORETIC DESIGN FRAMEWORK

2021 ◽  
Vol 1 ◽  
pp. 2007-2016
Author(s):  
Yoram Reich ◽  
Eswaran Subrahmanian
Keyword(s):  
Design Research ◽  
The Other ◽  
Design Studies ◽  
Abstraction Level ◽  
Follow Up Studies ◽  
The One ◽  
The Right ◽  
Abstract Framework ◽  
Tools And Methods

AbstractDesign research as a field has been studied from diverse perspectives starting from product inception to their disposal. The product of these studies includes knowledge, tools, methods, processes, frameworks, approaches, and theories. The contexts of these studies are innumerable. The unit of these studies varies from individuals to organizations, using a variety of theoretical tools and methods that have fragmented the field, making it difficult to understand the map of this corpus of knowledge across this diversity.In this paper, we propose a model-based approach that on the one hand, does not delve into the details of the design object itself, but on the other hand, unifies the description of design problem at another abstraction level. The use of this abstract framework allows for describing and comparing underlying models of published design studies using the same language to place them in the right context in which design takes place and to enable to inter-relate them, to understand the wholes and the parts of design studies.Patterns of successful studies could be generated and used by researchers to improve the design of new studies, understand the outcome of existing studies, and plan follow-up studies.

Grotian Moments and Peremptory Norms of General International Law: Friendly Facilitators or Fatal Foes?

Grotiana ◽  
2021 ◽  
Vol 42 (2) ◽  
pp. 335-353
Author(s):  
Dire Tladi
Keyword(s):  
International Law ◽  
The Other ◽  
High Threshold ◽  
Other Hand ◽  
State Practice ◽  
The One ◽  
Jus Cogens ◽  
The Right ◽  
Peremptory Norms ◽  
Law Making

Abstract The concept of a Grotian moment remains rather obscure in international law. On the one hand, it can refer simply to an empirical fact which galvanises the ordinary law-making processes, whether treaty-making or State practice, resulting in major shifts in international law. On the other hand, a Grotian moment might be seen as an event so significant that it results in an extraordinary shift in international law without full adherence to the processes for law-making. The former understanding has little legal significance, while the latter, which would be legally significant, would be controversial and without legal basis. Against this background the article discusses the intersections between peremptory norms and Grotian Moments. It does this by looking at the intersection between the two concepts as well as the intersection between Grotian Moments, on the one hand and, on the other hand, particular jus cogens norms. With respect to the former, for example, the article will consider whether the high threshold of peremptory status facilitates and hinders Grotian moments. With respect to the latter, the article will consider particular norms that have been said to have shifted on account of the Grotian moments, namely the right to use of force in self-defence as well humanitarian intervention.

Probleme de interpretare privind constituționalitatea și capacitatea juridică a subdiviziunilor administrativ-teritoriale

2020 ◽  
Vol 2019 ◽  
pp. 126-133
Author(s):  
Vlad-Cristian SOARE ◽  
Keyword(s):  
Legal System ◽  
Administrative Law ◽  
The Other ◽  
Political Regime ◽  
Legal Capacity ◽  
Other Hand ◽  
The One ◽  
The Right ◽  
The Revolution

"The fundamental transformations through the Romanian state passed since the Revolution of December 1989, have also put their mark on the legal system. For this reason, there have been major changes in the content of administrative law. However, the regulation of the territorial-administrative subdivisions survived the change of political regime, due to Law 2/1968. Moreover, regulations on administrative-territorial subdivisions are also found in Law 215/2001 and in the 1991 Constitution, revised in 2003. This has led to problems of interpretation. Thus, on the one hand, we need to identify who has the right to constitute administrative-territorial subdivisions, and on the other hand, it must be seen whether the answer to the first question, leads to a possible interpretation that would be unconstitutional. At the same time, administrative-territorial subdivisions have created problems of interpretation regarding their legal capacity. Through this article, we have proposed to look at the issues mentioned above."

scholarly journals Overtourism: Between the Right to Travel and Residents’ Rights

2019 ◽  
Vol 11 (7) ◽  
pp. 2138 ◽  
Author(s):  
Dalia Perkumienė ◽  
Rasa Pranskūnienė
Keyword(s):  
Review Paper ◽  
Sustainable Tourism ◽  
The Other ◽  
Integrative Review ◽  
Research Development ◽  
Tourism Research ◽  
Review Analysis ◽  
Preliminary Work ◽  
The One ◽  
The Right

Debates on overtourism, as a challenging phenomenon, are becoming more and more active. The purpose of this integrative review paper is to discuss the right to travel and residents’ rights in the context of overtourism and sustainable tourism, analyzing different scientific and legal sources. The integrative review analysis shows that overtourism and sustainable tourism are important contexts influencing the changing meaning of the right to travel and the right to live. On the one hand, the overtourism context makes the voices of residents more important to be heard, while on the other hand the sustainable tourism context influences the discussion of the right to travel, asking tourist voices to be considered more important. The results of this integrative review also shows the importance of rethinking the concept of sustainability in tourism as a holistic principle of democracy and as a degrowth movement, and opens the broader discussion for future tourism research development. The problem of overtourism could be solved by striving to develop sustainable tourism goals, thus balancing equality between the right to travel and residents’ rights. The presented integrative review paper is a preliminary work; further research is needed in order to find possible concrete solutions for overtourism.

A Tug of War Between Heritage Conservation and Property Rights: Some Success at Last for Heritage Conservation—City of Cape Town v. Oudekraal Estates (Pty) Ltd. [2007] JOL 20887 (C)

2009 ◽  
Vol 16 (1) ◽  
pp. 67-83 ◽  
Author(s):  
Margaret Beukes
Keyword(s):  
Property Rights ◽  
South African ◽  
Cape Town ◽  
The Other ◽  
Heritage Conservation ◽  
South African Context ◽  
Sensitive Issue ◽  
African Context ◽  
The One ◽  
The Right

When the idea of heritage conservation arises, one specific facet of the ensuing reflection is bound to emerge at some stage: the (inevitable) tension between property rights, on the one hand, and the right to culture (of which heritage conservation is an aspect), on the other. This tension intensifies when the cultural material to be conserved concerns a traditionally sensitive issue—that of the burial places of the ancestors of people designated in the South African context as previously disadvantaged.

scholarly journals There Is No Logical Negation Here, But There Are Alternatives: Modeling Conversational Negation with Distributional Semantics

2016 ◽  
Vol 42 (4) ◽  
pp. 637-660 ◽  
Author(s):  
Germán Kruszewski ◽  
Denis Paperno ◽  
Raffaella Bernardi ◽  
Marco Baroni
Keyword(s):  
Large Data ◽  
Semantic Space ◽  
The Other ◽  
Similarity Function ◽  
Distributional Semantics ◽  
Application Domain ◽  
Data Set ◽  
Logical Negation ◽  
The One ◽  
The Right

Logical negation is a challenge for distributional semantics, because predicates and their negations tend to occur in very similar contexts, and consequently their distributional vectors are very similar. Indeed, it is not even clear what properties a “negated” distributional vector should possess. However, when linguistic negation is considered in its actual discourse usage, it often performs a role that is quite different from straightforward logical negation. If someone states, in the middle of a conversation, that “This is not a dog,” the negation strongly suggests a restricted set of alternative predicates that might hold true of the object being talked about. In particular, other canids and middle-sized mammals are plausible alternatives, birds are less likely, skyscrapers and other large buildings virtually impossible. Conversational negation acts like a graded similarity function, of the sort that distributional semantics might be good at capturing. In this article, we introduce a large data set of alternative plausibility ratings for conversationally negated nominal predicates, and we show that simple similarity in distributional semantic space provides an excellent fit to subject data. On the one hand, this fills a gap in the literature on conversational negation, proposing distributional semantics as the right tool to make explicit predictions about potential alternatives of negated predicates. On the other hand, the results suggest that negation, when addressed from a broader pragmatic perspective, far from being a nuisance, is an ideal application domain for distributional semantic methods.

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