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Search Results: 1 - 10 of 437 matches for " Artem Olshevich "
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HafenCity: Sustainable Development of the Territory Хафенсити: устойчивое развитие территории
Artem Olshevich
Project Baikal , 2011,
Shared Space: Revolutionary Changes in the Streets of British Cities Shared Space: революционные изменения улиц британских городов
Artem Olshevich
Project Baikal , 2013,
Simulink/MATLAB Model for Assessing the Use of a Centrifugal Pump as a Hydraulic Turbine  [PDF]
Peter E. Jenkins, Artem Kuryachy
World Journal of Mechanics (WJM) , 2018, DOI: 10.4236/wjm.2018.87021
Abstract: A centrifugal pump used as a hydraulic turbine in producing power for a microhydropower system is multifaceted. Centrifugal pumps are far more ubiquitous than turbines in the turbomachinery market, therefore being more readily available to the consumer. Additionally, they are cheaper. Hydraulic turbines undergo rigorous CFD simulation design and testing to establish their blade geometries and ranges of operation. This results in a refined but very expensive final product. Centrifugal pumps are thus presented as a logical alternative seeing that they can physically perform the same task as a hydropower turbine albeit at a reduced efficiency. This paper presents the results of an analysis and simulation to assess the use of a centrifugal pump as a hydraulic turbine.
Inductive QSAR Descriptors. Distinguishing Compounds with Antibacterial Activity by Artificial Neural Networks
Artem Cherkasov
International Journal of Molecular Sciences , 2005, DOI: 10.3390/i6010063
Abstract: On the basis of the previous models of inductive and steric effects, ‘inductive’ electronegativity and molecular capacitance, a range of new ‘inductive’ QSAR descriptors has been derived. These molecular parameters are easily accessible from electronegativities and covalent radii of the constituent atoms and interatomic distances and can reflect a variety of aspects of intra- and intermolecular interactions. Using 34 ‘inductive’ QSAR descriptors alone we have been able to achieve 93% correct separation of compounds with- and without antibacterial activity (in the set of 657). The elaborated QSAR model based on the Artificial Neural Networks approach has been extensively validated and has confidently assigned antibacterial character to a number of trial antibiotics from the literature.
Review on ''Bioinformatics, Biocomputing and Perl'' by Michael Moorhouse and Paul Barry
Artem Cherkasov
BioMedical Engineering OnLine , 2004, DOI: 10.1186/1475-925x-3-33
Abstract: The book aims at both biology- and computation-oriented audiences and is designed as a number of 'crash-courses' quickly updating the reader on the basics of bioinformatics. It starts with a preface outlining main biological and technological concepts of the modern computational biology. The rest is organized into four sections consisting of 18 chapters elaborating on essential bioinformatics tools and skills.The section 'Working with Perl' presents an extended tutorial with practical tips and useful references for Perl beginners. Following this is 'Working with Data', which familiarizes the reader with some public genomic and proteomic databases and discusses important subjects of database formats, non-redundancy, cross-referencing and programmable access, etc. By working through the section, the reader acquires basic skills for mySQL database use and DBI Perl programming.Next, the authors offer Perl-based solutions for remote database access and for creation of WWW-based bioinformatics services using Perl functionalities in 'Working with the Web'.The final topic of the book, 'Working with Applications', features basic tools for sequence alignment, protein homology modeling and data visualization, all commonly used in bioinformatics practice. The section also offers recent and relevant examples of BioPerl applications.In general, the book reflects the state of bioinformatics field with its strengths and weaknesses. Many Perl chapters, such as Perl regular expressions, modular organization, DBI-programming, BioPerl and web-automation, are excellent. The presented material is rather comprehensive and yet easy to read – the authors spent appreciative efforts to make the book interesting and enjoyable. The authors also acknowledge the open-source nature of Perl and the bioinformatics community and offer on-line support and direct feedback to the readers.There are also certain aspects, in which the book could be further improved. Several sections may be too advanced for
The Capital on the Angara River Столица на Ангаре
Artem Ermakov
Project Baikal , 2011,
Chinese Migration to Russia as Revealed by Narratives in Chinese Cyberspace
Artem Rabogoshvili
Journal of Current Chinese Affairs , 2012,
Abstract: The article provides a seminal analysis of the electronic resources in the Chinese cyberspace devoted to the labour migration of Chinese people to Russia. The author focuses on the online narratives and media stories published on three types of electronic resources – government websites of the northeast provinces of the PRC, online reports by the Chinese news agencies, and postings on bulletin board systems (BBSs) in order to find answers to the following research questions: 1. What is the role of Chinese migrants’ narratives circulated via different electronic resources on the Internet in the reproduction of the state-regulated imagination of Russia? 2. To what extent have different types of electronic resources (government websites, news agency websites, BBSs) been used to renegotiate this imagination? The research has revealed that the websites of PRC government bodies tend to convey a rather consolidated understanding of Russia as a destination country, frequently publishing the narratives of successful migrants online. The mass media reports tend to provide regular coverage of a broader range of themes related to migration, including those related to the legal and economic vulnerability of Chinese labour migrants in Russia. The semi-anonymous and non-official character of the bulletin board system in turn has allowed its participants to make enquiries about or engage in the discussions of aspects of migration that would never be covered or described in detail by official sources such as government websites.
String theory in a vertex operator representation: a simple model for testing loop quantum gravity
Artem Starodubtsev
Physics , 2002,
Abstract: The loop quantum gravity technique is applied to the free bosonic string. A Hilbert space similar to loop space in loop quantum gravity as well as representations of diffeomorphism and hamiltonian constraints on it are constructed. The string in this representation can be viewed as a set of interacting relativistic particles each carrying a certain momentum. Two different regularizations of the hamiltonian constraint are proposed. The first of them is anomaly-free and give rise to interaction very similar to that of two dimensional $\phi^4$-model. The second version of hamiltonian constraint is similar to $\phi^3$-model and contains an anomaly. A possible relation of these two models to the conventional quantization of the string based on Fock space representation is discussed.
A note on quantization of matrix models
Artem Starodubtsev
Physics , 2002, DOI: 10.1016/j.nuclphysb.2003.09.053
Abstract: The issue of non-perturbative background independent quantization of matrix models is addressed. The analysis is carried out by considering a simple matrix model which is a matrix extension of ordinary mechanics reduced to 0 dimension. It is shown that this model has an ordinary mechanical system evolving in time as a classical solution. But in this treatment the action principle admits a natural modification which results in algebraic relations describing quantum theory. The origin of quantization is similar to that in Adler's generalized quantum dynamics. The problem with extension of this formalism to many degrees of freedom is solved by packing all the degrees of freedom into a single matrix. The possibility to apply this scheme to field theory and to various matrix models is discussed.
When Density Functional Theory goes wrong and how to fix it: spin balanced unrestricted Kohn-Sham formalism
Artem Masunov
Physics , 2003,
Abstract: Kohn-Sham (KS) formalism of Density Functional Theory is modified to include the systems with strong non-dynamic electron correlation. Unlike in extended KS and broken symmetry unrestricted KS formalisms, cases of both singlet-triplet and aufbau instabilities are covered, while preserving a pure spin-state. The straightforward implementation is suggested, which consists of placing spin constraints on complex unrestricted Hartree-Fock wave function. Alternative approximate approach consists of using the perfect pairing implementation with the natural orbitals of unrestricted KS method and square roots of their occupation numbers as configuration weights without optimization, followed by a posteriori exchange-correlation correction. The numerical results of this approximation for the barrier to the internal rotation in ethylene are reported to be in close agreement with experimental data.
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