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    Wyświetlanie 1-9 z 9
    Tytuł:
    Co-occurrence analyzis of key concept on risk-taking in organizational management research
    Autorzy:
    Gorzeń-Mitka, Iwona
    Powiązania:
    https://bibliotekanauki.pl/articles/1818468.pdf
    Data publikacji:
    2020-01-08
    Wydawca:
    Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
    Tematy:
    risk taking
    risk management
    co-occurrence analysis
    network analysis
    Opis:
    Risk-taking is a pivotal feature of entrepreneurship and business development. Poor management of business risk often leads to the loss of competitiveness with the consequence of business failure, and in contrast, it improves business sustainability when risks are managed effectively. The aimof thisresearch is to identify leading concepts and trends in research on risk-taking in organizationalmanagement researchby network analysis of keywords co-occurrence. Mapping knowledge domain was used as a useful method in bibliometrics. We analyzed 2912 records from Scopus database to risk-taking in organizational management research with the help of VOSviewer software tool. In particular, keywords co-occurrence analysis to visually explore knowledge bases, topic distribution, research fronts and research trends in the field of risk-taking research in a management context were adopted.
    Źródło:
    Zeszyty Naukowe Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach; 2019, 48, 121; 19-30
    2082-5501
    Pojawia się w:
    Zeszyty Naukowe Uniwersytetu Przyrodniczo-Humanistycznego w Siedlcach
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The latest streams of research on communication in risk management: a large-scale literature review based on co-occurrence data
    Autorzy:
    Gorzeń-Mitka, Iwona
    Powiązania:
    https://bibliotekanauki.pl/articles/1844921.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    risk management
    communication
    co-occurrence analysis
    literature review
    zarządzanie ryzykiem
    komunikacja
    analiza współwystępowania
    przegląd literatury
    Opis:
    Purpose: The scientific research on risk management has grown substantially over the past years. Communication on risk is central to the risk management strategy. As indicated by many researchers, communication is one of the key components of a successful risk management framework but, on the other hand, it is one of main categories of disruption and inefficiency in risk management process. Design/methodology/approach: The research aim is identification of the latest streams of research that concern communication in risk management by knowledge mapping and it provides a visualization reference in this research field. Some series of published papers on communication aspects in risk management in Scopus database from 2000 to 2018 were extracted. Then, based on the co-occurrence frequencies of key terms, mapping is done and clustering keywords are extracted by using VOSviewer software. Findings: The main research conclusions are as follows: (1) that communication studies are developing rapidly in the global academic community, (2) the frontier topics in this study consist of seven representative areas concentrated in main keywords like risk assessment, project management, risk perception, decision making, information management, risk analysis, disasters, and information technology, (3) the latest trends in research on communication aspects in risk management mainly include leadership context, climate change (especially regarding floods), food safety, corporate social responsibility, social media, and construction project. Research limitations/implications: This study investigated only leading trends in this area and identified selected challenges in an exploratory way. Practical implications: (not applicable). Social implications: (not applicable). Originality/value: This paper delivers an outline for main research trends in risk communication process within organisation
    Źródło:
    Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2020, 149; 219-236
    1641-3466
    Pojawia się w:
    Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Les mots de l’écologie : étude lexicométrique d’un corpus bilingue personnalisé (ECOTEXT 2021)
    The words of ecology: a lexicometric study of a personalized bilingual corpus (ECOTEXT 2021)
    Autorzy:
    Kaliska, Agnieszka
    Gostkowska, Kaja
    Powiązania:
    https://bibliotekanauki.pl/articles/43665629.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    automated discourse processing
    quantitative analysis
    qualitative analysis
    lexical co-occurrence
    ecology
    Opis:
    Our goal is to compare the words that are central to the discourses initiated by the most essential environmental protection organizations, both international and local, acting in France and in Poland. Our analysis is carried out in three stages: after briefly presenting some of the computerized corpus analysis methods and equipment we used to collect and process our bilingual corpus named ECOTEXT, we check its specificity and then move on to calculating word frequency and interpreting the frequency lists, starting with the analysis of the most frequent toponyms (e.g. France and Polska) and continuing with the most frequently represented nouns and adjectives. Throughout our analysis we return to the notion of interlinguisticequivalence which, as we shall show, does not turn out to be fully operative in confirming or denying the similarity of two discourses studied.
    Źródło:
    Studia Romanica Posnaniensia; 2022, 49, 4; 43-63
    0137-2475
    2084-4158
    Pojawia się w:
    Studia Romanica Posnaniensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Co-existence of physical activity (pa) and other energy-balance related behaviours among adolescents participating in pa intervention in Poland
    Autorzy:
    Zembura, Paweł
    Gołdys, Aleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/1055247.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    MVPA
    cluster analysis
    co-occurrence
    screen time
    sport intervention
    Opis:
    The aim of this study was to identify clusters based on four energy – balance related behaviours (EBRBs) – moderatevigorous physical activity, screen time, breakfast consumption and sweet drinks consumption – among adolescents participating in a governmental programme to increase their sport participation. The study was a part of the monitoring and evaluation process of a nationwide sport intervention in Poland. The sample consisted of 367 participants (180 females and 187 males, mean age 15.18 ±1.67). Data was self-reported. Based on combination of cluster analysis, a five-cluster solution was found the most suitable. Some patterns of EBRBs were similar to the results obtained in previous studies conducted on the general population on, for example “sedentarysnacking” or “all-round-healthy” clusters. The amount of the clusters which accumulated most of the negative or positive behaviours were small, and most clusters presented a mix of behavioural patterns influencing energy balance in both positive and negative ways. The structure of the clusters differed based on adolescents’ gender and, for male participants, fathers’ education (p < 0.05).
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2016, 16, 4; 43-54
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Corporate social responsibility knowledge base: A bibliometric analysis
    Autorzy:
    Nyabakora, Wakara Ibrahimu
    Mohabir, Sarah Elizabeth
    Powiązania:
    https://bibliotekanauki.pl/articles/36098983.pdf
    Data publikacji:
    2024
    Wydawca:
    Fundacja Naukowa Instytut Współczesnych Finansów
    Tematy:
    Citation analysis
    co-occurrence
    corporate social responsibility
    CSR
    VOSviewer
    Opis:
    This research aims to analyze the current landscape of Corporate social responsibility (CSR) research. Using the Scopus database, the study employed the PRISMA sampling technique and analyzed 3679 articles using the VOSviewer program. The results show the emergence of CSR research in 1989, with a notable focus on topics such as corporate performance, corporate governance, family business, and socially responsible investment. We also find no evidence of a relationship between the number of an author's articles and the number of citations. Moreover, CSR research is largely monopolized by developed countries, leaving developing economies in the dark. Our study provides valuable insights into the past, present, and future trajectories of CSR research.
    Źródło:
    Modern Finance; 2024, 2, 1; 101-120
    2956-7742
    Pojawia się w:
    Modern Finance
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Stability of Classical Taxonomy Bagging Metod with Bagging Based on Co-Occurence Data
    Porównanie stabilności klasycznej taksonomicznej metody bagging z metodą bagging opartą na macierzy współwystąpień
    Autorzy:
    Rozmus, Dorota
    Powiązania:
    https://bibliotekanauki.pl/articles/906849.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    Cluster analysis
    Cluster ensemble
    Stability
    Bagging in taxonomy
    Co-occurrence matrix.
    Opis:
    Ensemble approach has been successfully applied in the context of supervised learning to increase the accuracy and stability of classification. Recently, analogous techniques for cluster analysis have been suggested in order to increase classification accuracy, robustness and stability of the clustering solutions. Research has proved that, by combining a collection of different clusterings, an improved solution can be obtained. The stability of a clustering algorithm with respect to small perturbations of data (e.g., data subsampling or small variations in the feature values) or the parameters of the algorithm (e.g., random initialization) is a desirable quality of the algorithm. On the other hand, ensembles benefit from diverse clusterers. Although built upon unstable components, the ensemble is expected to be more accurate and robust than the individual clustering method. Here, we look at the stability of the ensemble methods based on bagging idea and co-occurrence matrix. This paper carries out an experimental study to compare stability of bagging method used to the classical data set with bagging based on co-occurrence matrix.
    Źródło:
    Acta Universitatis Lodziensis. Folia Oeconomica; 2012, 269
    0208-6018
    2353-7663
    Pojawia się w:
    Acta Universitatis Lodziensis. Folia Oeconomica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust content-based image retrieval using ICCV, GLCM, and DWT-MSLBP descriptors
    Autorzy:
    Chavda, Sagar
    Goyani, Mahesh
    Powiązania:
    https://bibliotekanauki.pl/articles/27312841.pdf
    Data publikacji:
    2022
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    content-based image retrieval
    improved color coherence vector
    gray-level co-occurrence matrix
    discrete wavelet transform
    multi-scale local binary pattern
    principal component analysis
    linear discriminant analysis
    Opis:
    Content-based image retrieval (CBIR) retrieves visually similar images from a dataset based on a specified query. A CBIR system measures the similarities between a query and the image contents in a dataset and ranks the dataset images. This work presents a novel framework for retrieving similar images based on color and texture features. We have computed color features with an improved color coherence vector (ICCV) and texture features with a gray-level co-occurrence matrix (GLCM) along with DWT-MSLBP (which is derived from applying a modified multi-scale local binary pattern [MS-LBP] over a discrete wavelet transform [DWT], resulting in powerful textural features). The optimal features are computed with the help of principal component analysis (PCA) and linear discriminant analysis (LDA). The proposed work uses a variancebased approach for choosing the number of principal components/eigenvectors in PCA. PCA with a 99.99% variance preserves healthy features, and LDA selects robust ones from the set of features. The proposed method was tested on four benchmark datasets with Euclidean and city-block distances. The proposed method outshines all of the identified state-of-the-art literature methods.
    Źródło:
    Computer Science; 2022, 23 (1); 5--36
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of macerals of the inertinite group using neural classifiers, based on selected textural features
    Identyfikacja macerałów grupy inertynitu z wykorzystaniem klasyfikatorów neuronowych w oparciu o wybrane cechy tekstury
    Autorzy:
    Skiba, M.
    Młynarczuk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/219222.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sieci neuronowe
    analiza składowych głównych
    macerały grupy inertynitu
    właściwości węgla
    parametry Haralicka
    macierz zdarzeń
    macerals of the inertinite group
    neural networks
    coal properties
    Haralick parameters
    co-occurrence matrix
    principal component analysis (PCA)
    Opis:
    The petrographic composition of coal has a significant impact on its technological and sorption properties. That composition is most frequently determined by means of microscope quantitative analyses. Thus, aside from the purely scientific aspect, such measurements have an important practical application in the industrial usage of coal, as well as in issues related to the safety in underground mining facilities. The article discusses research aiming at analyzing the usefulness of selected parameters of a digital image description in the process of automatic identification of macerals of the inertinite group using neural networks. The description of the investigated images was based on statistical parameters determined on the basis of a histogram and co-occurrence matrix (Haralick parameters). Each of the studied macerals was described by means of a 20-element feature vector. An analysis of its principal components (PCA) was conducted, along with establishing the relationship between the number of the applied components and the effectiveness of the MLP network. Based on that, the optimum number of input variables for the investigated classification task was chosen, which resulted in reduction of the size of the network’s hidden layer. As part of the discussed research, the authors also analyzed the process of classification of macerals of the inertinite group using an algorithm based on a group of MLP networks, where each network possessed one output. As a result, average recognition effectiveness of 80.9% was obtained for a single MLP network, and of 93.6% for a group of neural networks. The obtained results indicate that it is possible to use the proposed methodology as a tool supporting microscopic analyses of coal.
    Skład petrograficzny węgla w istotnym stopniu wpływa na jego właściwości technologiczne oraz sorpcyjne. Jest on najczęściej wyznaczany za pomocą mikroskopowych analiz ilościowych. Obok aspektu czysto naukowego, tego typu pomiary odgrywają więc znaczącą rolę praktyczną w przemysłowym wykorzystaniu surowca oraz zagadnieniach związanych z bezpieczeństwem w kopalniach podziemnych. W artykule przedstawiono badania mające na celu analizę przydatności wybranych parametrów opisu obrazu cyfrowego do prac dotyczących automatycznej identyfikacji macerałów grupy inertynitu z wykorzystaniem sieci neuronowych. Opis badanych obrazów oparto o parametry statystyczne wyznaczone na podstawie histogramu oraz macierzy zdarzeń (parametry Haralicka). Każdy z badanych maceratów opisano za pomocą 20-elementowego wektora cech. Przeprowadzono analizę jego składowych głównych (PCA) oraz określono wpływ liczby zastosowanych składowych na skuteczność działania sieci MLP. Na tej podstawie dobrano optymalną liczbę zmiennych wejściowych dla rozpatrywanego zagadnienia klasyfikacji, co skutkowało redukcją wymiaru warstwy ukrytej sieci. W ramach opisanych prac przeprowadzono także analizy dotyczące klasyfikacji macerałów grupy inertynitu z wykorzystaniem algorytmu bazującego na grupie sieci MLP, z których każda posiadała jedno wyjście. W wyniku badań uzyskano średnią skuteczność rozpoznań na poziomie 80,9% dla pojedynczej sieci MLP oraz 93,6% w przypadku grupy sieci neuronowych. Otrzymane rezultaty wskazują na możliwość zastosowania proponowanej metodyki jako narzędzia wspierającego mikroskopowe analizy węgla.
    Źródło:
    Archives of Mining Sciences; 2018, 63, 4; 827-837
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sąsiedztwo i następstwo gatunków drzew w Białowieskim Parku Narodowym
    Neighbourhood and succession of tree species in the Bialowieza National Park
    Autorzy:
    Gazda, A.
    Miścicki, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/986644.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    parki narodowe
    Bialowieski Park Narodowy
    lasy
    drzewa lesne
    gatunki roslin
    wspolwystepowanie
    sasiedztwo roslin
    nastepstwo roslin
    warstwa macierzysta
    warstwa odnowienia
    suma miazszosci drzew
    suma wysokosci drzew
    analiza kanoniczna
    regresja wieloraka
    avoidance
    canonical analysis
    co−occurrence
    life strategy
    overstorey
    regeneration layer
    Opis:
    The diversity and sustainability of species composition are important topic of forest research. The possibility to observe the coexistence of tree species in a given forest patch and their succession in the next generation is limited because there are few forests unaffected by management activities. For this reason, the study was conducted in the oldest part of the Białowieża National Park, called Strict Reserve. The purpose of the research was to determine the relationship between the quantity of individual tree species in the overstorey (the standing volume of trees with the diameter at breast height d8 cm) and regeneration layer (the total height of trees with the diameter at breast height d8 cm or height h1.3 m) as well as the relationships between those stand layers. Multiple regression and canonical analysis were used to determine the relationships between 12 tree species (tab. 1). The research material was the results of measurements of 920 concentric sample plots conducted in 1995 and 2005. In the overstorey, the correlation coefficient between the standing volume of a given tree species on sample plots and the standing volume of other tree species assumed for each species both significant positive values (species ‘co−occurrence'), significant negative values (species ‘avoidance’) and close to zero values (fig. 1). The same was true for the regeneration layer (fig. 2). In eight cases the correlation between the total height of trees of a given species in the regeneration layer and the standing volume of trees from the overstorey showed the highest positive values when referred to the ‘regeneration−overstorey' relationship of the same species (fig. 3). The same referred to the ‘overstorey−regeneration' relationship (fig. 4). Eight of the canonical variables turned out to be significant (tab. 2). For the first canonical variable, standing volume of hornbeam in the overstorey (Gb_m) showed the highest absolute value of the loading factor in the first dataset, while the variable the total height of hornbeam trees in the regeneration layer (Gb_o) – in the other dataset (fig. 5). The total redundancy was 20.7%, which means that such part of the variance of the total height of individual tree species in the regeneration layer could be explained by their standing volume in the overstorey. The sequence of tree generations understood as the relationship between species composition of the regeneration and overstorey layers was associated with life strategies of tree species.
    Źródło:
    Sylwan; 2018, 162, 03; 209-219
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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