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Wyszukujesz frazę "information rank" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Ranga i zakres tematyczny współczesnych zasobów NASA dostępnych na wirtualnych nośnikach YouTube
Rank and thematic scope of NASA’s resources available on YouTube videosharing website
Autorzy:
Kosmela, M.
Powiązania:
https://bibliotekanauki.pl/articles/1510767.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Geograficzne
Tematy:
NASA
NASA Goddard
NASA GSFC
YouTube
ranga edukacyjna
ranga informacyjna
ranga prognostyczna
educational rank
information rank
prognostic rank
Opis:
The article presents the author study, the aim of which is to define the thematic scope of resources employed in research of NASA scientists and give them the appropriate rank. The value ranks were determined by the functions performed by various divisions, highlighting their importance from the point of view of the Internet user. As a result, this article presents the partition of a set of resources due to the leading topic of animation and describes the significance of the collection to the public in of scientific, economic, cultural and social context. The object of analysis were visualizations available on the official YouTube channel: NASA Goddard. The research was carried out on the basis of a subscription channel organization in the server, the articles posted on the website of NASA and the scientific publications of the team members. The first stage of this work was to see the English-language films, to make their translation and to identify the thematic groups, called the work levels. Elements forming interpreted resource were classified employing the deductive method, where the levels of higher (general) order were divided into lower order levels with a certain degree of detail.
Źródło:
Teledetekcja Środowiska; 2015, 53; 87-111
1644-6380
Pojawia się w:
Teledetekcja Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Latent semantic indexing using eigenvalue analysis for efficient information retrieval
Autorzy:
Aswani Kumar, Ch.
Srinivas, S.
Powiązania:
https://bibliotekanauki.pl/articles/908375.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
wyszukiwanie informacji
indeksowanie semantyczne
wartość własna
wektor przestrzenny
information retrieval
latent semantic indexing
eigenvalues
rank reduction
singular value decomdecomposition
vector space method
Opis:
Text retrieval using Latent Semantic Indexing (LSI) with truncated Singular Value Decomposition (SVD) has been intensively studied in recent years. However, the expensive complexity involved in computing truncated SVD constitutes a major drawback of the LSI method. In this paper, we demonstrate how matrix rank approximation can influence the effectiveness of information retrieval systems. Besides, we present an implementation of the LSI method based on an eigenvalue analysis for rank approximation without computing truncated SVD, along with its computational details. Significant improvements in computational time while maintaining retrieval accuracy are observed over the tested document collections.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2006, 16, 4; 551-558
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Rank Controlled Differential Quadrature Method for Solving an Infinite Steel Plate Cooling Problem
Autorzy:
Żak, P. L.
Suchy, J. S.
Lelito, J.
Gracz, B.
Powiązania:
https://bibliotekanauki.pl/articles/381994.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information technology
foundry industry
solidification process
exact solution
rank controlled differential quadrature
numerical modelling
technologia informatyczna
przemysł odlewniczy
proces krzepnięcia
dokładne rozwiązanie
kwadratura różniczkowa sterowanego rzędu
modelowanie numeryczne
Opis:
Rank Controlled Differential Quadrature method is a numerical method that allows to approximate the partial derivatives that appears in partial differential equations. Those equations with proper geometrical, physical, initial and boundary conditions make mathematical models of physical process. The heat transfer process is governed by Fourier–Kirchhoff equation, which is parabolic Partial Differential Equation. In this paper authors present the steel plate cooling problem. At the beginning of the process plate is heated up to 450 °C and is cooled to ambient temperature. The cooling of the plate is basic heat transfer problem. If the plates dimensions has proper proportions such problem may be described as one dimensional and solved exactly. The mathematical model and exact solution is given in the work. Authors apply the Rank Controlled Differential Quadrature to approximate derivatives in Fourier–Kirchhoff equation and in boundary conditions. After changing derivatives into quadrature formulation set of algebraic equations is obtained. Substituting thermo-physical parameters numerical model is obtained. The computer program was prepared to solve the problem numerically. Results of simulation are confronted with the exact ones. Error value at each time step as well as error value increase rate for examined numerical method is analyzed.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3 spec.; 201-206
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the Covid-19 pandemic on the rates of return of selected WSE listed companies
Autorzy:
Jabłoński, Bartłomiej
Kika, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/27313343.pdf
Data publikacji:
2023
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
COVID-19 pandemic
rate of return
P/E ratio
P/BV ratio
information efficiency
Spearman’s rank correlation coefficient
Covid-19 pandemia
stopa zwrotu
wskaźnik P/E
wskaźnik P/BV
efektywność informacyjna
współczynnik korelacji rang Spearmana
Opis:
Purpose: Financial crises, stock market crashes and consequently bursts of speculative enthusiasm have been accompanying investors since the 17th century. The first speculative bubble, so-called “tulip mania”, occurred in the Netherlands between 1636 and 1637, while a speculative “fever” spread among the shareholders of the Dutch East India Company from 1636 to 1640. Those events exposed remarkable possibilities and complexity of the financial markets, and later encouraged investors to explore a variety of investment strategies bringing above-average rates of return. However, the question remains: how do modern-day investors react to the market disruptions and which investment strategies are popular among them. The purpose of this paper is to provide an understanding of how and why the COVID-19 pandemic affected the investors’ behavior and the rates of return earned by selected WSE listed companies. An attempt was also made to estimate the sensibility of investing in selected stocks through the use of the basic and most popular fundamental analysis market ratios, i.e. P/E and P/BV. Furthermore, based on selected companies, semi-strong information efficiency of the Polish stock market was assessed, with a particular focus on the COVID-19 pandemic period. Methodology: The paper assesses the rates of return of companies constituting the WIG20 index and selected “covid” companies and calculates P/E and P/BV market ratios to verify how the fundamentals of a given company affect its rates of return. As a measure of relationship strength between the market value and rate of return indicators, the Spearman's rank correlation coefficient and a significance test for the Spearman's rank correlation coefficient were selected. Findings: The research reveals that, during times of violent turmoil and massive panic on the stock markets, an interesting investment strategy that brings above-average rates of return is to build a stock portfolio based on a current trend. All hypotheses formulated were positively verified in the paper. Practical implications: The study's results provide a valuable source of information for stock market investors, particularly individual investors who, when making tough investment decisions, i. e. during stock market crashes or financial crises, can employ strategies that involve building an investment portfolio based on trending companies and achieve above-average rates of return. Furthermore, the suggested investment strategy is adaptable and, over centuries, still effective. Originality: The considerations concentrated not only on identifying an appropriate investment strategy in times of a stock market turmoil, but largely focused around behavioral aspects of investing, which represent an important addition to theories about rational decision-making by investors and the efficiency of financial markets.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2023, 169; 351--370
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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