scholarly journals Twisted quantum affine superalgebra , invariantR-matrices and a new integrable electronic model

1997 ◽  
Vol 30 (12) ◽  
pp. 4313-4325 ◽  
Author(s):  
Mark D Gould ◽  
Jon R Links ◽  
Yao-Zhong Zhang ◽  
Ioannis Tsohantjis
Keyword(s):  
Electronic Model ◽  
Quantum Affine Superalgebra

Crystal Violet, an Electronic Model Substance for Rubber and Related Olefins

1951 ◽  
Vol 24 (1) ◽  
pp. 169-181 ◽  
Author(s):  
G. J. van Veersen
Keyword(s):  
Crystal Violet ◽  
Electronic Structures ◽  
Radical Reaction ◽  
Test Tube ◽  
Chemical Agent ◽  
Blue Color ◽  
Electronic Model ◽  
Model Substance ◽  
Model Substances ◽  
Polar Reaction

Abstract It is shown that triphenylmethyl dyes like crystal violet can be used as model substances for rubber and related olefins. Arguments are given in support of the assumption that agents which react with rubber and related olefins in a polar manner cause a reversible shift in color from blue to yellow with crystal violet, whereas a fading of the blue color of crystal violet (if alkaline or reducing agents are excluded) points to a radical reaction. Since the electronic structures of donor olefins and crystal violet are considered and not the molecular structure, as usually is done in the choice of a model substance, these dyes have been named electronic model substances. Though crystal violet, as an electronic model substance cannot be used for the study of the overall reactions, information can often be obtained concerning the first step in a reaction of rubber with a certain chemical agent by means of a simple test-tube reaction with crystal violet. It was pointed out that the π-electron availability at the non-methylated carbon atom of the double bond in rubber and at the nitrogen atoms in crystal violet is probably of the same order. As an application of crystal violet as an electronic model substance for rubber, a polar reaction between sulfur and rubber is suggested as the first step in vulcanization.

Nonlinear Behavior of Sinusoidally Forced Pyloric Pacemaker Neurons

2001 ◽  
Vol 85 (4) ◽  
pp. 1623-1638 ◽  
Author(s):  
Attila Szűcs ◽  
Robert C. Elson ◽  
Michail I. Rabinovich ◽  
Henry D. I. Abarbanel ◽  
Allen I. Selverston
Keyword(s):  
Complex Dynamics ◽  
Cooperative Behavior ◽  
Model Neuron ◽  
Nonlinear Behavior ◽  
Periodic Forcing ◽  
Pacemaker Neurons ◽  
Strongly Coupled ◽  
Electronic Model ◽  
Group 2 ◽  
Low Dimensional

Periodic current forcing was used to investigate the intrinsic dynamics of a small group of electrically coupled neurons in the pyloric central pattern generator (CPG) of the lobster. This group contains three neurons, namely the two pyloric dilator (PD) motoneurons and the anterior burster (AB) interneuron. Intracellular current injection, using sinusoidal waveforms of varying amplitude and frequency, was applied in three configurations of the pacemaker neurons: 1) the complete pacemaker group, 2) the two PDs without the AB, and 3) the AB neuron isolated from the PDs. Depending on the frequency and amplitude of the injected current, the intact pacemaker group exhibited a wide variety of nonlinear behaviors, including synchronization to the forcing, quasiperiodicity, and complex dynamics. In contrast, a single, broad 1:1 entrainment zone characterized the response of the PD neurons when isolated from the main pacemaker neuron AB. The isolated AB responded to periodic forcing in a manner similar to the complete pacemaker group, but with wider zones of synchronization. We have built an analog electronic circuit as an implementation of a modified Hindmarsh-Rose model for simulating the membrane potential activity of pyloric neurons. We subjected this electronic model neuron to the same periodic forcing as used in the biological experiments. This four-dimensional electronic model neuron reproduced the autonomous oscillatory firing patterns of biological pyloric pacemaker neurons, and it expressed the same stationary nonlinear responses to periodic forcing as its biological counterparts. This adds to our confidence in the model. These results strongly support the idea that the intact pyloric pacemaker group acts as a uniform low-dimensional deterministic nonlinear oscillator, and the regular pyloric oscillation is the outcome of cooperative behavior of strongly coupled neurons, having different dynamical and biophysical properties when isolated.

ROLE OF THE ELECTRON–PHONON INTERACTION ON THE SPECTRAL DENSITY AND PSEUDOGAP IN CUPRATES

2002 ◽  
Vol 16 (23) ◽  
pp. 3465-3471
Author(s):  
I. CHAUDHURI ◽  
S. K. GHATAK
Keyword(s):  
Critical Temperature ◽  
Spectral Density ◽  
Low Energy ◽  
Phonon Interaction ◽  
Energy Excitation ◽  
Electron Phonon Interaction ◽  
Peak Structure ◽  
Electronic Model ◽  
Jahn Teller

The pseudogap structure in low energy excitation in cuprates appears below a temperature and the spectral density exhibits strong wave-vector dependence. An electronic model that emphasized the coupling of carrier in Cu-O with phonon is examined for pseudogap. The electron–phonon interaction originates from the modulation of on-site and hopping energy and leads to spontaneous Jahn–Teller-like distortion and pseudogap below a critical temperature. At low temperature the spectral density has two-peak structure about the Fermi level for all k along Γ-M whereas such structure exists along Γ-X for small k only. The magnitude of pseudogap shows strong k-dependence — maximum along Γ-M and vanishes along Γ-X. These features emphasize the role of electron–phonon interaction in formation of pseudogap.

scholarly journals Construction of 3D Wireframe Model in Problem of Converting Paper Drawing and Design Documentation into an Electronic Model of an Object

2020 ◽  
pp. 67-82
Author(s):  
Sergey Romensky ◽  
Sergey Rotkov
Keyword(s):  
Three Dimensional ◽  
Skeleton Model ◽  
Temporal Characteristics ◽  
Application Program ◽  
Electronic Model ◽  
Design Documentation ◽  
Graphic Information ◽  
Wireframe Model

This work is devoted to various stages of the formation of a three-dimensional wireframe model when solving the problem of converting paper drawings into drawing-design documentation. The stages of obtaining geometric-graphic information by an application program and forming a three-dimensional skeleton model are considered in detail. The study of the temporal characteristics of the developed algorithm is also given.

scholarly journals MODEL MEDIA PEMBELAJARAN E-KOMIK UNTUK SMA

2018 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Wiwik Akhirul Aeni ◽  
Ade Yusupa
Keyword(s):  
Model Development ◽  
Quality Of Education ◽  
Analysis Model ◽  
Learning To Read ◽  
Prototype Development ◽  
Digital Format ◽  
Electronic Model ◽  
Innovative Learning ◽  
The Subject

The development of learning media model becomes a necessity for improving the quality of education in Indonesia. Following the development of technology and information, new models continue to be developed, one of which is comic. This study aims to develop a model of electronic comic (e-Comic) as a medium of learning. With the ADDIE development method, it is done through needs analysis, model design, prototype development, prototype implementatio (testing) and evaluation of prototype implementation results to the field. The result is a comic electronic model in which graphic-shaped graphics are highlighted to deliver learning materials in accordance with the applicable curriculum. The material is delivered in story form so the delivery is not rigid. Implementation of field trial prorotype obtained data that the user liked the model of this e-Comic learning media and feel like learning to read comics with digital format. The conclusion of the development of e-Comic model, innovative learning media, fun, effective and efficient, so as to increase the students' attention in understanding the subject AbstrakPengembangan model media pembelajaran menjadi kebutuhan untuk peningkatan kualitas pendidikan di Indonesai. Mengikuti perkembangan teknologi dan informasi, model-model baru terus dikembangkan dari waktu ke waktu. Komik yang dimaknai sebagai sebuah gambar kartun berteks mampu menyampaikan sebuah pesan dengan gaya yang ringan dan menyenangkan.Tujuan pembuatan model ini untuk membuat sebuah model berformat elektronik komik (E-komik) sebagai media pembelajaran menyampaikan materi pendidikan. Dengan metode pengembangan ADDIE, yang dimulai dengan kegiatan Analisis Kebutuhan, Desain/Perancangan Model, Development Prototype, Implementasi Prototype berbentuk ujicoba prototype ke user dan dilanjutkan dengan Evaluasi hasil implementasi prototype ke lapangan model Elektronik komik ini dikembangkan. Hasil dari pengembangan ini adalah sebuah model elektronik komik yang didalamnya berupa grafis berbentuk kartun ditonjolkan untuk menyampaikan materi-materi pembelajaran sesuai dengan kurikulum yang berlaku di sekolah. Materi disampaikan dalam bentuk cerita sehingga penyampaiannya tidak kaku. Implementasi ujicoba prorotype dilapangan diperoleh data bahwa user menyukai model media pembelajaran E-komik ini dan merasa belajar seperti membaca komik dengan format digital. Kesimpulan pengembangan model E-komik yang dilakukan menjadi salah satu jawaban atas kebutuhan terhadap media pembelajaran yang inovatif, menyenangkan, efektif dan efisien, sehingga dapat meningkatkan perhatian siswa dalam memahani mata ajar. Untuk itu penerapannya dapat dilakukan secara bertahap pada SMA tertentu.

scholarly journals Implementation of the electronic model of the thematic and typological acquisition plan in the scientific library

2021 ◽  
pp. 38-43
Author(s):  
A. S. Pavlova
Keyword(s):  
Technical Information ◽  
Russian Science ◽  
Subsequent Work ◽  
Russian Academy Of Sciences ◽  
Computer Technologies ◽  
Electronic Catalog ◽  
Electronic Model ◽  
Russian Science Citation Index ◽  
Academy Of Sciences ◽  
Central Scientific

Automation of library processes is an important topic in modern conditions of digitalization and transition of human activities to the latest computer technologies. Acquisition of literature to library collections forms the document base for the subsequent work of the library, so this process needs continuous improvement and optimization of its constituent operations. The article is devoted to the application of computer technologies in the preparation and use of the scientific library thematic-typological plan of acquisition as the scientific base of building collections. The object of the article is to present the experience of creating and using the electronic model of the Thematic and Typological Acquisition Plan in the scientific library, to define the perspectives of implementing the data base for information and library servicing UB RAS users.The article presents the results of content analysis of subject headings and indices of the State Rubricator of Scientific and Technical Information for bibliographic descriptions of Russian journals received in 2015–2017, in the Consolidated electronic catalog of periodicals of the Central Scientific Library of the Ural Branch of the Russian Academy of Sciences; of books, published by the institutes of the Ural Branch of the Russian Academy of Sciences in 2015–2017, according to the Electronic catalog of Russian books and continuing publications of the Central Scientific Library of the Ural Branch of the Russian Academy of Sciences; of publications (published in 2015–2019) of the institutes of the Ural Branch of the Russian Academy of Sciences, included in the database of the Russian Science Citation Index on the portal «eLIBRARY.ru» – are presented in the article. It also describes the stages of creation, analyzes the characteristics and capabilities of the database «Thematic-typological acquisition plan» of the Central Scientific Library of the Urals Branch of the Russian Academy of Sciences.

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