4,038 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
"Large eaters" meet blood vessels: a new thematic series on macrophages and angiogenesis
No full textVascular Cell has launched a new series on macrophages and angiogenesis, a quickly evolving field critical to blood and lymphatic vessels during development, inflammation and tumorigenesis
Sound Design As a Prominent Method of Stage Work withFocus on Own Practical Research
No full textAutor práce se zabývá sound designem se zaměřením na divadlo. Téma je
vztaženo k autorské inscenaci Rest In Noise (autorský tým: Jan Tomšů, 3. roč.
Scénografie ALD, Štěpán Lustyk, 3. roč. Herectví ALD a Jakub Frank, 2. roč. mgr.
Teorie a dějiny výtvarného umění, UPOL), které tematizuje zvukovou složku a
zkoumá vztah zvuku a diváka-posluchače. Práce obsahuje také výzkum
potenciálního užití zvuku v divadle doplněného o příklady divadelní praxe
zejména v českém prostředí.The author of the work deals with sound design with focus on theatre. The theme
is applied to an original production entitled Rest In Noise (creative team: Jan
Tomšů, 3rd year at Stage Design at ALD, Štěpán Lustyk, 3rd year at Acting at ALD
and Jakub Frank, 2nd year at Arts Studies at UPOL) which focuses on the sound
component and examines the relationship between the sound and the audiencelistener.
The work also includes research of potential use of sound in theatre
completed with examples of theatre practice mainly from the Czech environment
Vzpomínka na Jana Hromádku. K 100. výročí narození =The 100th anniversary of Jan Hromádka
No full textThe author recalls Jan Hromádka, born on 18th December 1886 one of the greatest Czechoslovak geographers, the founder of the modem Slovak geography and the author of an outstanding work called The Orographic Classification of the Czechoslovak Republic25726
Classification of earth colours
No full textTitle: Classification of earth colours Author: Jiří Mareš Department: Department of Software Engineering Supervisor: Mgr. Jan Blažek Supervisor 's e-mail address: [email protected] Abstract: This bachelor thesis is dealing with the classification of earth colours origin based on its chemical composition. For classification is used K-means classificator, Bayes classificator and self made classification algorithms. Part of this bachelor thesis is also public web service [http://klasifikatorhlinek.somee.com] that contains the classification algorithms. Key words: classification, k-means, Bayess classificator, weight rati
Modelling of impulse loading in high-temperature superconductors. Assessment of accuracy and performance of computational techniques.
No full textPurpose – The aim of this paper is to access performance of existing computational techniques to model strongly non-linear field diffusion problems. Design/methodology/approach – Multidimensional application of a finite volume front-fixing method to various front-type problems with moving boundaries and non-linear material properties is discussed. Advantages and implementation problems of the technique are highlighted by comparing the front-fixing method with computations using fixed grids. Particular attention is focused on conservation properties of the algorithm and accurate solutions close to the moving boundaries. The algorithm is tested using analytical solutions of diffusion problems with cylindrical symmetry with both spatial and temporal accuracy analysed. Findings – Several advantages are identified in using a front-fixing method for modelling of impulse phenomena in high-temperature superconductors (HTS), namely high accuracy can be obtained with a small number of grid points, and standard numerical methods for convection problems with diffusion can be utilised. Approximately, first order of spatial accuracy is found for all methods (stationary or mobile grids) for 2D problems with impulse events. Nevertheless, errors resulting from a front-fixing technique are much smaller in comparison with fixed grids. Fractional steps method is proved to be an effective algorithm for solving the equations obtained. A symmetrisation procedure has to be introduced to eliminate a directional bias for a standard asymmetric split in diffusion processes. Originality/value – This paper for the first time compares in detail advantages and implementation complications of a front-fixing method when applied to the front-type field diffusion problems common to HTS. Particular attention is paid to accurate solutions in the region close to the moving front where rapid changes in material properties are responsible for large computational errors. Keywords - Modelling, Numerical analysis, Diffusion, High temperatures, Superconductors Paper type - Research pape
Jan Ptaszycki (1854-1912)
No full textJan Ptaszycki był polskim matematykiem pracującym w Petersburgu w latach 1876-1912. W Polsce jest zapomniany, a w Rosji uważany zazwyczaj za rosyjskiego matematyka, znanego tam jako Iwan Lwowicz Ptaszycki. W rosyjskiej literaturze historyczno-matematycznej, w zależności od autora, podaje się, że Ptaszycki był rosyjskim matematykiem lub, rzadziej, polskim matematykiem, na przykład u Łokoć (2015, 2018). Ważne informacje o Ptaszyckim pochodzą z nekrologów K. A. Posse (1912) i S. Dicksteina (1912) oraz ze wspomnień I. Ja. Depmana (1960), którzy znali go osobiście. Chcemy przybliżyć współczesnemu czytelnikowi tego zapomnianego polskiego matematyka pracującego w Petersburgu. Po omówieniu jego biografii krótko omawiamy jego prace matematyczne. Na zakończenie artykułu cytujemy artykuły i książki związane z dorobkiem naukowym Ptaszyckiego oraz podajemy pełną listę prac i ksiązek, które opublikował a także listę prac, gdzie można znaleźć informacje o nim.Jan Ptaszycki was a Polish mathematician working in St. Petersburg in the period 1876–1912. In Poland, he is forgotten, and in Russia considered generally as a Russian mathematician, known there as Ivan Lvovich Ptaszycki. In Russian literature about history of mathematics, depending on the author, it is reported that Ptaszycki was a Russian mathematician or, more rarely, a Polish mathematician as, for example, in Lokot (2015, 2018). The important information about Ptaszycki comes from the obituaries of K. A. Posse (1912) and S. Dickstein (1912) and from the memoirs of I. Ja. Depman (1960), that is from people who knew him personally. We wanted to make known to the contemporary reader this forgotten Polish mathematician working in St. Petersburg. This article tries to reach his work and achievement in mathematics as well as information about his activity. After discussing his biography, we briefly discuss his mathematical work. At the end of this paper, we quote articles and books related to Ptaszycki scientific achievements and we present a full list of his published works and books, and also references where one can find information about him.Validerad;2019;Nivå 1;2019-08-20 (johcin)</p
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