Sergey Alexandrovich Afonin

Lomonosov Moscow State University

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Dmitry Alexeevich Shachnev

Lomonosov Moscow State University

АК

А.С. Козицын

Lomonosov Moscow State University

Alexander Sergeevich Kozitsyn

Lomonosov Moscow State University

Valentin A. Krassilov

University of Haifa

VА

V. А. Vasenin

Lomonosov Moscow State University

ВВ

В.А. Васенин

Lomonosov Moscow State University

Elena Khazova

Lomonosov Moscow State University

Alexander Sergeevich Kozitsin

Alexander Serggevich Kozitsin

Lomonosov Moscow State University

Andrey Alexandrovich Zenzinov

Cooperative Institutions

Lomonosov Moscow State University

Moscow State University

Russian Academy of Sciences

Geological Institute

Institute of Paleontology A A Borisyak

University of Haifa

Carmel (Israel)

American Museum of Natural History

University of New England

University of California, Berkeley

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Abnormal pollen grains: an outcome of deteriorating atmospheric conditions around the Permian–Triassic boundary

Journal of the Geological Society (2005)

C.B. Foster Sergey Alexandrovich Afonin

Records of abnormal gymnosperm pollen morphotypes from coeval localities in Russia and NW China provide independent and unique evidence of deteriorating atmospheric conditions at the close of the Permian. Although at similar palaeolatitude, the Vologda region of European Russia and the Junggar Basin of Xinjiang Province, China, were thousands of kilometres apart and on different tectonic plates. The co-occurrence of the megaspore Otynisporites eotriassicus Fuglewicz 1977 , and its restricted distribution elsewhere in marine sections with either Late Permian ammonoids or the basal Triassic conodont marker Hindeodus parvus , confirms the age range, and correlation of the Russian and NW Chinese sections. In three Chinese sections, rapid changes in carbon isotopic (δ 13 C org ) composition of between 4 and 10‰ occur over the intervals showing abnormal pollen. These patterns reflect bioclastic facies contributions responding to local environmental changes. They are nevertheless coincident with global perturbations in the atmosphere, caused by extensive volcanic activity around the Permian–Triassic boundary.

10.1144/0016-764904-047

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Citations (138)

Using the Co-Authority Graph for the Thematic Search of Conferences on Scientometric Data

Russian Digital Libraries Journal (2023)

Alexander Sergeevich Kozitsyn Sergey Alexandrovich Afonin Dmitry Alexeevich Shachnev

Thematic information search is used in various fields of activity. The use of thematic analysis tools to search for conferences allows you to increase the completeness of the search and coverage of conferences, helps to expand the circle of scientific communication of young scientists and the formation of closer scientific connections. The search algorithms developed by the authors use the co-authorship graph and the reference set of authors. The set can be obtained using methods of thematic search of experts or based on given samples. The developed algorithms are language insensitive and take into account the authority of conferences in the scientific community. Approbation was carried out on the data of the scientometric system IAS ISTINA.

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Thematic Analysis

Completeness (order theory)

10.26907/1562-5419-2022-25-6-600-615

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Алгоритм поиска по ключевым словам специалистов в заданной предметной области

Sovremennye informacionnye tehnologii i IT-obrazovanie. (2021)

Alexander Sergeevich Kozitsyn Sergey Alexandrovich Afonin Dmitry Alexeevich Shachnev

Особое внимание в современном мире уделяется тематическому поиску информации. Поиск специалистов можно назвать наиболее сложным направлением для тематического поиска, которое необходимо развивать для решения многих актуальных задач в сфере науки и бизнеса. В начале статьи дается краткий обзор существующих подходов к решению этой задачи, а также приводится список существующих информационных систем для поиска специалистов и экспертов. В работе описывается разработанный для решения этой задачи алгоритм, апробация которого проведена на данных наукометрической системы ИАС ИСТИНА, которая используется с 2012 года для сбора данных о научной деятельности в Московском Государственном Университете им. М. В. Ломоносова. Тематический поиск осуществляется на основании анализа данных о статьях, докладах и тезисах конференций, монографий, диссертаций, НИР, читаемых лекциях и спецкурсах. Для проведения тематического поиска специалистов используется следующая информация об объектах научной деятельности: название; список авторов; ключевые слова и аннотации. Основными особенностями разработанного алгоритма являются: возможность поиска специалистов без их активного участия в процессе поиска, возможность осуществлении поиска на русском и английском языках; использования для поиска не только научных публикаций, но и другой научной продукции; дополнительное определение авторитетности специалистов по графу соавторства. В статье приводится описание разработанного алгоритма тематического поиска, а также интерфейса его программной реализации, созданного в рамках апробации на реальных данных наукометрической системы ИСТИНА. В разработанном интерфейсе можно осуществлять поиск по ключевым словам с дополнительной фильтрацией по рубрикам, а также просматривать детализированную информацию по найденным специалистам. Thematic search for information is an important problem now. The search for specialists can be called the most difficult direction for thematic search. This direction needs to be developed in many areas of activity. At the beginning of the article, a brief overview of existing approaches to solving this problem is given. The following is a list of existing information systems for finding specialists and experts. The paper describes an algorithm developed for solving this problem. Approbation of the algorithm is implemented on the data of the scientometric system IAS ISTINA, which has been used since 2012 to collect data on scientific activities at the Lomonosov Moscow State University. Thematic search uses data analysis of articles, reports and abstracts of conferences, monographs, dissertations, lectures and training courses. The following information about the objects of scientific activity is used: name of object; list of authors; keywords and annotations. The main features of the developed algorithm are: the search for specialists without their active participation in the search process, the ability to search in Russian and English; use all kind of scientific products for searching; additional definition of the authority of specialists in the co-authorship graph. The article describes the developed thematic search algorithm and the interface of its software implementation. This interface was created to test the algorithm on real data of the scientometric system ISTINA. In this interface, you can search by keywords with additional filtering by headings and view detailed information on the specialists found.

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Interface (matter)

10.25559/sitito.17.202101.711

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Methods for thematic search of conferences based on scientometric data

Naučnyj servis v seti internet (2022)

Alexander Sergeevich Kozitsyn Sergey Alexandrovich Afonin Dmitry Alexeevich Shachnev

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Completeness (order theory)

Thematic Analysis

10.20948/abrau-2022-3

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On Automated Hyperonym Hierarchy Construction Using an Internet Search Engine

Pacific Asia Conference on Language, Information, and Computation (2010)

Sergey Alexandrovich Afonin

In this paper we propose an approach for automatic construction of concept hier- archies from the snippets returned by Internet search engines using a number of well known techniques. We use surface lexical patterns to construct a set of candidate hypernyms of a given term and additional filtering that is based on both lexical patterns and distributional analysis. Preliminary experimental results for real life English examples are presented.

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Представление научных результатов в Интернет

Обозрение прикладной и промышленной математики (2013)

Sergey Alexandrovich Afonin Д.Д. Голомазов А.С. Козицын

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Validation of Safety-Like Properties for Entity-Based Access Control Policies

Advances in intelligent systems and computing (2018)

Sergey Alexandrovich Afonin Antonina Bonushkina

Impossibility

Sequence (biology)

Discretionary access control

10.1007/978-3-030-03314-9_23

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Citations (1)

Algorithm for Searching Experts in Scientometric Systems

Naučnyj servis v seti internet (2021)

А.С. Козицын Sergey Alexandrovich Afonin Dmitry Alexeevich Shachnev

The use of modern methods of thematic analysis for the analytical processing of large amounts of information is currently used in almost all spheres of human activity. Scientometrics is one such area. Research carried out in this area shows that the statistical characteristics of citation rates are highly dependent on the thematic area of papers at hand. In this regard, systems for calculating citation indicators and constructing assessments of the quality of scientific works, ranks of authors or organizations should take into account the thematic area of researchers in order to normalize scientometric indicators. Many scientometric systems and citation systems use subject headings for information retrieval and processing. The world famous citation systems, including WoS, Scopus, Google Shcolar, and others have such headings. Important practical tasks that can be solved using the methods of thematic classification are: assessment of the dynamics of the development of thematic areas in an organization, in a particular country and in world science as a whole; search for articles on a given topic; search and assessment of the authority of experts; search for journals for publication and other urgent tasks. The authors have created software implementations of algorithms for solving some of the listed problems, and research is being conducted to create new effective mathematical models and algorithms in this area.

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Thematic Analysis

10.20948/abrau-2021-6-ceur

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Citations (3)

Method of refinement of bibliographic data of scientific articles on the basis of statistics in large collections of bibliographic data

Alexandr Sergeevich Kozitsin Sergey Alexandrovich Afonin Andrey Alexandrovich Zenzinov

Basis (linear algebra)

10.20948/abrau-2017-10

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