Theoretical background on technology-enabled learning from an instructional designer’s point of view

Author(s):  
Iman N’hari
2015 ◽  
Vol 52 (2) ◽  
pp. 221-232
Author(s):  
Pál Dömösi ◽  
Géza Horváth

In this paper we introduce a novel block cipher based on the composition of abstract finite automata and Latin cubes. For information encryption and decryption the apparatus uses the same secret keys, which consist of key-automata based on composition of abstract finite automata such that the transition matrices of the component automata form Latin cubes. The aim of the paper is to show the essence of our algorithms not only for specialists working in compositions of abstract automata but also for all researchers interested in cryptosystems. Therefore, automata theoretical background of our results is not emphasized. The introduced cryptosystem is important also from a theoretical point of view, because it is the first fully functioning block cipher based on automata network.


2016 ◽  
Vol 7 (2) ◽  
pp. 150-166 ◽  
Author(s):  
Péter Ván

Abstract The experimental basis and theoretical background of non-Fourier heat conduction is shortly reviewed from the point of view of non-equilibrium thermodynamics. The performance of different theories is compared in case of heat pulse experiments.


1995 ◽  
Vol 10 ◽  
pp. 201-201
Author(s):  
N. Capitaine ◽  
B. Guinot

In 1991, IAU Resolution A4 introduced General Relativity as the theoretical background for defining celestial space-time reference sytems. It is now essential that units and constants used in dynamical astronomy be defined in the same framework, at least in a manner which is compatible with the minimum degree of approximation of the metrics given in Resolution A4.This resolution states that astronomical constants and quantities should be expressed in SI units, but does not consider the use of astronomical units. We should first evaluate the usefulness of maintaining the system of astronomical units. If this system is kept, it must be defined in the spirit of Resolution A4. According to Huang T.-Y., Han C.-H., Yi Z.-H., Xu B.-X. (What is the astronomical unit of length?, to be published in Asttron. Astrophys.), the astronomical units for time and length are units for proper quantities and are therefore proper quantities. We fully concur with this point of view. Astronomical units are used to establish the system of graduation of coordinates which appear in ephemerides: the graduation units are not, properly speaking astronomical units. Astronomical constants, expressed in SI or astronomical units, are also proper quantities.


2021 ◽  
Vol 11 (2) ◽  
pp. 83-101
Author(s):  
Mária T. Patakyová

Abstract Digitalisation is a challenge from the regulatory point of view. Competition law, as a special type of regulation, is no exception to this. The article explores the risks of digitalisation, especially the ones related to the enhanced use of pricing algorithms. In theory, pricing algorithms are not easily assessed from the perspective of competition law, let alone its application in practice. The prohibition of anticompetitive agreements (pursuant to Article 101 of the Treaty on Functioning of the European Union (TFEU)) is applied with certain difficulty to agreements created by using pricing algorithms. This is an unfortunate situation, as horizontal agreements represent one of the worst infringements of EU competition law, including price cartels or bid rigging. Apart from presenting a theoretical background, the article dives into the practice of the Antimonopoly Office of the Slovak Republic (AMO) in order to assess which practical issues the AMO might face when applying the theoretical concepts. In sum, the article asks from a theoretical perspective which issues of competition law have been introduced (or deepened) by the enhanced digitalisation, looking in particular to pricing algorithms. On top of that, the article explores the issues which may be encountered in practice, taking the Slovak jurisdiction as the example. The willingness and feasibility of the AMO to enforce digital issues such as pricing algorithms is assessed based on the previous acts of the AMO as well as the new Act on Protection of Competition, adopted by the Slovak parliament on 11 May 2021.


2019 ◽  
Vol 16 (16) ◽  
pp. 158-169
Author(s):  
Olena Stanishevska

Introduction. In scientific literature dedicated to J. Brahms, much attention has been paid to a song genre. The researches note that J. Brahms’s songs can be regarded as a continuation of genre-specific features of Austro-German Lied, which retains the purity of the generic semantics in the composer’s works, without involving typically operatic means of vocal intoning, or approaching the so-called “poem with music”. J. Brahms’s songs do not allow the singer to demonstrate the full range of his/her voice, to reveal his/her artistic temperament, to show the technical skill. Absorption in a special emotional aura of J. Brahms’s songs requires a variety of timbre-intonational resources of a singer, his/her ability not to lose the sense of the whole while detailing the melodious overture. Of particular interest is the issue of music and words correlation in J. Brahms’s songs. As a rule, the composer is considered to be the immediate successor of F. Schubert rather than R. Schuman in his orientation to musical embodiment of a generalized poetic image. At the same time, this issue requires more detailed study, since the composer was very sensitive to the poetic text, in particular, from the point of view of coordinating the intonation-phonetic features of German language and vocal intonation. Theoretical Background. Recent research and publications analysis. Opus 49 by J. Brahms seems to be in the shadow of musicological thought and performing practice. It should be noted that a very famous opus part is “Lullaby”, which is mentioned in the monographs of K. Tsareva (1986), M. Druskin (1959), and K. Geiringer (1965). In the literature being considered the abovementioned opus is not completely covered, thus determining the relevance of our article. There are references to individual songs in different sources, but incidentally, in the context of different issues. Objective is to study J. Brahms’s opus 49 in the aspect of the interaction of poetic word and music, verbal and musical intoning. Methods: 1) historical method, allowing to comprehend the selected material in the perspective of the development of Austro-German song of the XIX century; 2) intonational method, which involves the study of vocal melody in terms of phonetic-tonic links; 3) genre method, caused by the features of chamber vocal lyrics; 4) stylistic method, corresponding to a specific opus consideration in the general context of the composer’s creative work. Results and Discussion. The composer did not have any tendency to the songs cyclization, however, the vocal miniatures, assembled in one opus, appear to be lyrical notes, self-contained but united by poetic motives and nature of the author’s expression. Many researchers see a cyclic organization of his particular vocal opuses. For example, I. Mykhailov (1987: 19) proves the existence of cyclic principles at different compositional levels in composer’s songs: separate “melodious pairs”, a number of songs with the texts by one poet inside the opus, a whole vocal opus with the texts by different authors. According to I. Mikhailov, the cyclic connection of songs is emphasized by several compositional techniques: thematic one, i.e. the unity of the musical material; the continuity of songs alternation, which is sometimes manifested in the absence of a piano introduction of the next song. In opus 49, the author chooses different poetic sources – poems by P. Heyse, L. Hölty, A. F. Schack, and J. Wenzig. The composer refers to one of the samples of the famous collection by Joachim von Arnim and Clemens Brentano “The Magic Horn of a Boy”. Given the anthological principle of poetic texts selection, no transparent storyline in opus 49, such as “A Beautiful Miller” by F. Schubert or “Poet’s Love” by R. Schumann, there is no reason to regard it as a cycle. However, the opus’ songs are arranged in a certain semantic sequence. Owing to the fact that three songs (“Sunday Morning”, “To a Violet”, “Longing for the Sweetheart”) are united by homogeneous poetic motifs, one can regard them as forming a microcycle within the whole. The second micro-cycle of the opus is represented by No. 4 and No. 5 (“Lullaby” and “Twilight”). In interpreting the poetic text, J. Brahms adheres to the principle of emotional and musical generality, once detailing the text, if at all. Here, he succeeds F. Schubert. However, he uses the technique of keywords, distinguishing them in two ways: rhythmically (with syncope) and through intrinsic chants; the composer also uses different types of intoning. Following the tradition of the 19th-century Austro-German song, the composer regards the genre as an alliance of two full members: the vocalist and the pianist, with the part being an instrumental generalization. The intonational image of the whole in vocal music arises at the crossing of two texts – poetic and musical. German has intonation difficulties owing to a large number of consonants. Problems, encountered by the singers in intoning German language, are compensated by the consonants and vowels, which are most favorable for correct sound formation, allowing to achieve the required quality. The soft consonants and vowels should be regarded as the ideal vocal sound, that is, a model for other phonemes in musical-poetic text. While creating vocal melodies of Opus 49 songs, J. Brahms cares the phonetics of a German text in the singing to be comfortable for the performer. Conclusions. J. Brahms uses such principles and techniques of literary original musical embodiment as preservation of the holistic image, created by the author of the poems, on the one hand, and its detailing on the other. In the second case, the composer resorts to all means of musical expression: motive-thematic, texture-register, rhythmic, harmonious, texture ones. The prospects of the research lie in studying the interaction of verbal and musical intonation in other vocal works of J. Brahms, as well as in chamber-vocal music of late romantics.


1986 ◽  
Vol 17 (2) ◽  
pp. 93-100
Author(s):  
J. J. Van Zyl

Strategic marketing management of some suppliers to the Agricultural sector in the Republic of South Africa The Republic of South Africa is at present in a state of change within the economical, political, social, institutional, physical and international environments. Change in these fields is still in an early phase and rapid changes can be expected in future. From a management point of view, these changes are a fact and must be considered and taken into account in the decision-making process. Modern enterprise in the free-market system functions within the framework of the changing environment and the ability to grow and develop are dependent on the ability of the individual firm to adapt to these changes. The aim of the research was to determine how marketing management of some suppliers of capital equipment to the agricultural sector apply strategic marketing principles and practices, to enable their firms to adapt to constant external changes. Apart from a theoretical background some empirical research was undertaken to determine the composition of the management and marketing strategies. The emphasis is, however, on the formulation of the marketing strategy and the implementation of the marketing strategy.


2006 ◽  
Vol 2006 ◽  
pp. 1-13
Author(s):  
Jan Awrejcewicz ◽  
Yuriy Pyryev

The methods of both analysis and modeling of contact bush-shaft systems exhibiting heat generation and wear due to friction are presented [3–5]. From the mathematical point of view, the considered problem is reduced to the analysis of ordinary differential equations governing the change of velocities of the contacting bodies, and to the integral Volterra-type equation governing contact pressure behavior. In the case where tribological processes are neglected, thresholds of chaos are detected using bifurcation diagrams and Lyapunov exponents identification tools. In addition, analytical Mel'nikov's method is applied to predict chaos. It is shown, among the others, that tribological processes play a stabilizing role. The following theoretical background has been used in the analysis: perturbation methods, Mel'nikov's techniques [7,8], Laplace transformations, the theory of integral equations, and various variants of numerical analysis.


2002 ◽  
Vol 10 (1) ◽  
pp. 26-42 ◽  
Author(s):  
C. R. Natoli ◽  
M. Benfatto ◽  
S. Della Longa ◽  
K. Hatada

State-of-the-art techniques for analysing X-ray absorption spectra are reviewed, with an eye to biological applications. Recent attempts to perform full spectral fitting of the XANES energy region and beyond for the purpose of structural analysis have met with encouraging success. The present paper analyses the theoretical motivations behind this success and indicates routes for future improvements. The theoretical background is not entirely new, although the point of view is, and some sections and appendices present material that the authors believe has never been published before. The aim of this paper is to provide a theoretical analysis that is as self-contained as possible.


2009 ◽  
Vol 5 (H15) ◽  
pp. 302-302
Author(s):  
Yasunori Fujii

I start with assuming a gravitational scalar field as the dark-energy supposed to be responsible for the accelerating universe. Also from the point of view of unification, a scalar field implies a time-variability of certain “constants” in Nature. In this context I once derived a relation for the time-variability of the fine-structure constant α: Δα/α =ζ Ƶ(α/π) Δσ, where ζ and Ƶ are the constants of the order one, while σ on the right-hand side is the scalar field in action in the accelerating universe. I use the reduced Planckian units with c=ℏ =MP(=(8π G)−1/2)=1. I then compared the dynamics of the accelerating universe, on one hand, and Δα/α derived from the analyses of QSO absorption lines, Oklo phenomenon, also different atomic clocks in the laboratories, on the other hand. I am here going to discuss the theoretical background of the relation, based on the scalar-tensor theory invented first by Jordan in 1955.


Author(s):  
Nándor Kaliczka

A cikk a tartós eszközök gazdasági értékcsökkenésének elméleti hátterét vizsgálja az eszközökben megtestesülő szolgálatok felemésztődése szempontjából. Ezt a felemésztődést az eszközök kimerülésén és elhasználódásán túl, a gazdasági környezetben megjelenő testet öltő és testet nem öltő technológiai fejlődés következtében fellépő avulás is befolyásolja, mely avulás hatását a cikk részletesen tárgyalja. A technológiai fejlődés következtében fellépő avulásnak igen fontos szerepe van az eszközökhöz, és azok használati módjához legjobban illeszkedő értékcsökkenési minta kirajzolásában, amely alapján meghatározott értékcsökkenés központi eleme a vállalkozások jövedelmének, valamint a vállalkozási output egységköltségének, ami az output árazásának fontos tényezője. Ezáltal az értékcsökkenés meghatározásánál figyelembe vett avulás hatással van a vállalkozás termék és tőkepiaci versenyképességére. ___________ The paper examines the theoretical background of durable asset’s economic depreciation, from the embodied services consumption point of view. This consumption is affected by the exhaustion and deterioration beyond obsolescence which is due to embodied and disembodied technological progress that appears in the economic environment. The effect of obsolescence on the economic depreciation is examined in this paper in detail. The obsolescence due to technological progress has an important role in determining the best fit depreciation pattern to the durable asset and its usage. The economic depreciation is a central component of the company’s income, as well as the unit cost of the company’s output, which is an important element of the output pricing process. Thereby the obsolescence recognised by determining economic depreciation influences the company’s competitiveness on the product and capital markets.


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