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    Wyświetlanie 1-9 z 9
    Tytuł:
    The Technological Factors of Enterprise Innovation in a Strategic Perspective
    Autorzy:
    Rojek, Danuta
    Powiązania:
    https://bibliotekanauki.pl/articles/2023970.pdf
    Data publikacji:
    2021-12
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovativeness
    technology
    factor analysis
    structural equation modeling
    Opis:
    Enterprise innovation is currently becoming a recognized factor of the competitiveness, survival, and development of companies in the market economy. Managers still need recommendations on ways of stimulating the growth of innovation in their companies. The objective of this paper is to identify the strategic factors of enterprise innovativeness in the area of technology, defined as the most important internal factors positively impacting the innovativeness of enterprises in a strategic perspective. Empirical studies were conducted using the Computer-Assisted Web Interview (CAWI) method on a purposive sample of N = 180 small and medium-sized innovative industrial processing enterprises in Poland. Data analysis was performed using Exploratory Factor Analysis within the Confirmatory Factor Analysis framework (E-CFA) and Structural Equation Modeling (SEM). Empirical research shows that the strategic factor of enterprise innovativeness in the area of technology is technological activity. A technologically active company should (1) possess a modern machinery stock, (2) conduct systematic technological audits, and (3) maintain close technical cooperation with the suppliers of raw materials, consumables, and intermediates. The implementation of the indicated recommendations by managers should lead to increased innovativeness of small and medium-sized industrial companies. The author recommends the use of the presented research procedure and data analysis methods in further studies.
    Źródło:
    Management and Production Engineering Review; 2021, 14, 4; 87-98
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The structure of the teacher Machiavellianism model in social interactions in a school environment
    Autorzy:
    Bańka, Augustyn
    Orłowski, Karol
    Powiązania:
    https://bibliotekanauki.pl/articles/430272.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    teacher personality
    Machiavellianism
    the Dark Triad,
    structural equations modeling
    Opis:
    The aim of this article is to present study results concerning the structure of teacher Machiavellianism. Machiavellianism was researched extensively throughout the last 40 years as a personality feature comprising traits related to leadership manipulation tactics. Psychology describes Machiavellianism as a part of the universal model called “the dark triad of personality” alongside with subclinical narcissism, subclinical psychopathy and low empathy. The teacher Machiavellianism model presented in this article, as opposed to the universal models, strongly accentuates the context-specifi c variables related to the organization of life in a school, alongside with personality variables. To achieve a new insight into the mechanism of how teacher Machiavellianism is generated, structural equation modeling (SEM) was used, which incorporates personality variables such as: self-effi cacy, disposition for gratitude, values, one’s personal resources, professional burnout, alongside context-specifi c variables like: organizational culture, work attitude, tenure and specialization in the tasks performed. Results of two studies are shown, discussing the empirical structure of teacher Machiavellianism components in relation to the initial theoretical model.
    Źródło:
    Polish Psychological Bulletin; 2012, 43, 4; 215-222
    0079-2993
    Pojawia się w:
    Polish Psychological Bulletin
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of knowledge management practices on supply chain quality management and competitive advantages
    Autorzy:
    Azizi, R.
    Maleki, M.
    Moradi-Moghadam, M.
    Cruz-Machado, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/406697.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    knowledge management
    practices
    supply chain
    quality management
    structural equation modeling
    Opis:
    Achieving competitive advantage enables an organization to create a defensible position against its competitors. It also allows organizations to differentiate themselves from competitors. This study aims to investigate impact of knowledge management practices on supply chain quality management and competitive advantage in Alyaf Company, Iran. This research is functional in purpose and data gathering and data analysis is descriptive-correlation. The statistical population is consists of 25 company executives and experts in the supply chain of Alyaf Company; opinions of 68 of its members were used as a selective sample identified by simple random sampling method. Primary data was collected through questionnaire and structural equation modeling was used to assess relationships between variables. The results of structural equation modeling show a positive and significant causal relationship between knowledge management practices and supply chain quality management. Direct relationship between knowledge management and competitive advantage was not confirmed but the relationship between these two variables was confirmed indirectly.
    Źródło:
    Management and Production Engineering Review; 2016, 7, 1; 4-12
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uwarunkowania skłonności do palenia papierosów. Wyniki modelowania równań strukturalnych
    Autorzy:
    Czaderny, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/1827684.pdf
    Data publikacji:
    2017-06-02
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lung cancer
    cancer prevention
    cancer control
    smoking
    masculinity
    childhood
    SEM
    structural equation modeling
    epidemiology
    health gap
    Opis:
    According to the age-period-cohort projection of lung cancer incidence (ICD-10 codes C33-C34), smoking prevention will be crucial for both men and women longevity. Lung cancer remains the main cancer cause of death among males in Poland. In 2014 the number of deaths in Poland caused by lung cancer among men was more than twice as high as for women. The study is focused on identification of attitudes influencing the propensity to smoke, which is performed by structural equation modelling (SEM) based on weighted least squares means and variance adjusted (WLSMV) estimation. Good fit of the presented models is demonstrated by RMSEA, NNFI and CFI values. Reliability of scales is assessed by ordinal alpha and ordinal theta coefficients. Commitment to learning in childhood exhibits the highest standardized effect on propensity to smoke, which is an argument for youth smoking prevention. Structural equation model was estimated for men and women separately because of gender differences in smoking determinants. A strong character, individualism and self-reliance are the factors, which increase smoking propensity among males. These can be treated as features of masculinity and are not statistically important determinants of being a smoker for females. Depressive disorders, being a victim of violence as adults are statistically significant determinants of smoking among women.
    Źródło:
    Studia Demograficzne; 2017, 171, 1; 49-69
    0039-3134
    Pojawia się w:
    Studia Demograficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Satisfaction Drivers in Retail Banking: Comparison
    Autorzy:
    Oleksiak, Monika
    Powiązania:
    https://bibliotekanauki.pl/articles/483291.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    satisfaction
    loyalty
    customer satisfaction index models
    banking sector
    structural equation models with latent variables
    structural equations modeling
    partial least squares
    covariance based methods
    Opis:
    The primary goal of the study is to diagnose satisfaction and loyalty drivers in Polish retail banking sector. The problem is approached with Customer Satisfaction Index (CSI) models, which were developed for national satisfaction studies in the United States and European countries. These are multiequation path models with latent variables. The data come from a survey on Poles' usage and attitude towards retail banks, conducted quarterly on a representative sample. The model used in the study is a compromise between author's synthesis of national CSI models and the data constraints. There are two approaches to the estimation of the CSI models: Partial Least Squares - used in national satisfaction studies and Covariance Based Methods (SEM, Lisrel). A discussion is held on which of those two methods is better and in what circumstances. In this study both methods are used. Comparison of their performance is the secondary goal of the study.
    Źródło:
    Central European Journal of Economic Modelling and Econometrics; 2009, 1, 1; 83-102
    2080-0886
    2080-119X
    Pojawia się w:
    Central European Journal of Economic Modelling and Econometrics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling and Analysis of Mechanical Properties in Structural Steel-DOE Approach
    Autorzy:
    Bhatt, A.
    Parappagoudar, M. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/947580.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    structural steel
    alloying elements
    linear model
    stal konstrukcyjna
    dodatki stopowe
    model liniowy
    Opis:
    The present work focuses on the modeling and analysis of mechanical properties of structural steel. The effect of major alloying elements namely carbon, manganese and silicon has been investigated on mechanical properties of structural steel. Design of experiments is used to develop linear models for the responses namely Yield strength, Ultimate tensile strength and Elongation. The experiments have been conducted as per the full factorial design where all process variables are set at two levels. The main effect plots showed that the alloying elements Manganese and Silicon have positive contribution on Ultimate tensile strength and Yield strength. However, Carbon and Manganese showed more contribution as compared to Silicon. All three alloying elements are found to have negative contribution towards the response- Elongation. The present work is found to be useful to control the mechanical properties of structural steel by varying the major alloying elements. Minitab software has been used for statistical analysis. The linear regression models have been tested for the statistical adequacy by utilizing ANOVA and statistical significance test. Further, the prediction capability of the developed models is tested with the help of test cases. It is found that all linear regression models are found to be statistically adequate with good prediction capability. The work is useful to foundrymen to choose alloying elements composition to get desirable mechanical properties.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 5-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Austenite Grain Size Estimation in Structural Steels by Linear Section Method
    Ocena wielkości ziarna austenitu metodą przekrojów liniowych
    Autorzy:
    Adrian, H.
    Wiencek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/353098.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    modeling
    austenite grain size
    linear section method
    modelowanie
    wielkość ziarna austenitu
    metoda przekrojów liniowych
    Opis:
    Linear section of grains in polyhedral material microstructure is a system of chords on a test line. The mean chord length is the linear grain size of the material. In the prior austenite microstructure of low alloy structural steels, the chord length is a random variable which has the gamma distribution. The distribution parameters are closely related to the austenite linear grain size. Because the sequent chord lengths are statistically independent, the grain size interval estimation (confidence interval) may be performed by the chi-square distribution.
    Przekrój liniowy ziarn mikrostruktury materiału polikrystalicznego jest układem cięciw linii testowej. Średnia długość cięciw jest liniową wielkością ziarna materiału. W mikrostrukturze pierwotnego austenitu niskostopowych stali konstrukcyjnych długość cięciwy jest zmienną losową, która ma rozkład gamma. Parametry rozkładu są ściśle związane z liniową wielkością ziarna austenitu. Ponieważ kolejne długości cięciw są statystycznie niezależne, przedziałową ocenę wielkości ziarna (przedział ufności) można wykonać za pomocą rozkładu chi-kwadrat.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 4; 2463-2469
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A BIM technology-based underwater structure damage identification and management method
    Autorzy:
    Li, Xiaofei
    Su, Rongrong
    Cheng, Peng
    Sun, Heming
    Meng, Qinghang
    Song, Taiyi
    Wei, Mengpu
    Zhang, Chen
    Powiązania:
    https://bibliotekanauki.pl/articles/2204531.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    building information modeling
    underwater structural disease
    damage identification
    deep learning
    modelowanie informacji o budynku
    identyfikacja uszkodzeń
    uczenie głębokie
    uszkodzenie podwodnej konstrukcji
    Opis:
    With the continuous development of bridge technology, the condition assessment of large bridges has gradually attracted attention. Structural Health Monitoring (SHM) technology provides valuable information about a structure's existing health, keeping it safe and uninterrupted use under various operating conditions by mitigating risks and hazards on time. At the same time, the problem of bridge underwater structure disease is becoming more obvious, affecting the safe operation of the bridge structure. It is necessary to test the bridge’s underwater structure. This paper develops a bridge underwater structure health monitoring system by combining building information modeling (BIM) and an underwater structure damage algorithm. This paper is verified by multiple image recognition networks, and compared with the advantages of different networks, the YOLOV4 network is used as the main body to improve, and a lightweight convolutional neural network (Lite-yolov4) is built. At the same time, the accuracy of disease identification and the performance of each network are tested in various experimental environments, and the reliability of the underwater structure detection link is verified.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e144602
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design optimization for the weight reduction of 2-cylinder reciprocating compressor crankshaft
    Autorzy:
    Arshad, Ali
    Cong, Pengbo
    Elsayed Elmenshawy, Adham Ahmed Awad
    Blumbergs, Ilmārs
    Powiązania:
    https://bibliotekanauki.pl/articles/1845022.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    reciprocating compressor
    crankshaft optimization
    weight reduction
    topology optimization
    stress
    distribution
    crank web
    lightweight crankshaft design
    crack modeling
    static structural analysis
    modal analysis
    sprężarka tłokowa
    optymalizacja wału korbowego
    redukcja wagi
    optymalizacja topologii
    naprężenie
    dystrybucja
    wstęga korby
    lekka konstrukcja wału korbowego
    modelowanie pęknięć
    statyczna analiza konstrukcji
    analiza modalna
    Opis:
    This study aims to optimize the 2-cylinder in-line reciprocating compressor crankshaft. As the crankshaft is considered the "bulkiest" component of the reciprocating compressor, its weight reduction is the focus of current research for improved performance and lower cost. Therefore, achieving a lightweight crankshaft without compromising the mechanical properties is the core objective of this study. Computational analysis for the crankshaft design optimization was performed in the following steps: kinematic analysis, static analysis, fatigue analysis, topology analysis, and dynamic modal analysis. Material retention by employing topology optimization resulted in a significant amount of weight reduction. A weight reduction of approximately 13% of the original crankshaft was achieved. At the same time, design optimization results demonstrate improvement in the mechanical properties due to better stress concentration and distribution on the crankshaft. In addition, material retention would also contribute to the material cost reduction of the crankshaft. The exact 3D model of the optimized crankshaft with complete design features is the main outcome of this research. The optimization and stress analysis methodology developed in this study can be used in broader fields such as reciprocating compressors/engines, structures, piping, and aerospace industries.
    Źródło:
    Archive of Mechanical Engineering; 2021, LXVIII, 4; 449-471
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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