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Wyświetlanie 1-10 z 44
Tytuł:
Antecedents of Entrepreneurial Intention among Young People: Model and Regional Evidence
Autorzy:
Kobylińska, Urszula
Nazarko, Łukasz
Martínez-González, José Alberto
García-Rodríguez, Francisco J.
Wydawca:
MDPI
Cytata wydawnicza:
Martínez-González JA, Kobylinska U, García-Rodríguez FJ, Nazarko Ł. (2019) Antecedents of Entrepreneurial Intention among Young People: Model and Regional Evidence, Sustainability 11(24): 6993
Opis:
Ministry of Science and Higher Education of the Polish Republic (research project number S/WZ/1/2018)
Entrepreneurial intentions determine to a large extent the entrepreneurial behavior; therefore, the study of those intentions and the factors that influence them constitute a valid research area. The purpose of this regional comparative study was to design a new causal model of the formation of the entrepreneurial intention among young adults in Spain and Poland. Using the Structural Equation Modeling (PLS) methodology, the results show that subjective variables (beliefs, social norms, values) initiate the chain of effects that influence the action variables (motivation, self-efficacy, intention). Attitude is the nexus variable between both groups of variables. It is verified that there are no significant differences in the responses to the items or in the causal relationships of the model between both countries. This confirms the relevance of a homogenizing generational approach at a global level that allows the application of policies to promote the entrepreneurial intention for the entire segment. The proposed model takes into account and complements the previous designs, and is practical because it can be used at different levels of the education sector and by institutions promoting entrepreneurship and sustainability.
Dostawca treści:
Repozytorium Centrum Otwartej Nauki
Artykuł
Tytuł:
Computational approaches to Explainable Artificial Intelligence : advances in theory, applications and trends
Autorzy:
Jimenez-Mesa, C.
Nalepa, Grzegorz
Macas, B.
Martínez-Tomás, R.
Rodríguez-Rodríguez, I.
Marrero-Aguiar, V.
Palma, J.
Varela, R.
Bonomini, P.
Salas-Gonzalez, D.
Barakova, E.
Bologna, G.
Graña, M.
Mekyska, J.
Martinez-Murcia, F.J.
García González, J.
Ortiz, A.
Pinninghoff, M.A.
Silva, M.
Gallego-Molina, N.J.
Wang, S.H.
Zhu, H.
Gómez-Vilda, P.
Simic, D.
Zhu, Z.
Palacios-Alonso, D.
Tsanas, A.
Zhang, Y.D.
Garre, C.
Roelofsma, P.H.M.P.
Atzmueller, M.
Julian, V.
Gamazo, J.
Gómez-Rodellar, A.
Shoeibi, A.
Ballarini, F.
Contreras, R.
Kutt, Krzysztof
Ramírez, J.
Psarrou, A.
Pereira, A.
Rincón, M.
Garcia-Rodriguez, J.
Suckling, J.
Castillo-Barnes, D.
Cuadra, J.M.
Domínguez-Mateos, F.
de Lope, J.
Santos, J.
Guerrero-Rodriguez, B.
Álvarez-Marquina, A.
Wang, W.
Górriz, J.M.
Rodellar-Biarge, V.
Orellana, D.
Fernandez-Jover, E.
Castellanos-Dominguez, G.
Cho, S.B.
Elizondo, D.
Treur, J.
Duro, R.J.
Arco, J.E.
Salcedo-Lagos, P.
Ferrández-Vicente, J.M.
Martinez, J.J.
Hendrikse, S.C.F.
Fernández-Caballero, A.
Álvarez-Illán, I.
Domínguez, E.
Pinacho-Davidson, P.
Garrigós, J.
Jodra-Chuan, M.
Novais, P.
Kotz, G.
Formoso, M.A.
Segovia, F.
Ponticorvo, M.
Leming, M.
Opis:
Deep Learning (DL), a groundbreaking branch of Machine Learning (ML), has emerged as a driving force in both theoretical and applied Artificial Intelligence (AI). DL algorithms, rooted in complex and non-linear artificial neural systems, excel at extracting high-level features from data. DL has demonstrated human-level performance in real-world tasks, including clinical diagnostics, and has unlocked solutions to previously intractable problems in virtual agent design, robotics, genomics, neuroimaging, computer vision, and industrial automation. In this paper, the most relevant advances from the last few years in Artificial Intelligence (AI) and several applications to neuroscience, neuroimaging, computer vision, and robotics are presented, reviewed and discussed. In this way, we summarize the state-of-the-art in AI methods, models and applications within a collection of works presented at the 9th International Conference on the Interplay between Natural and Artificial Computation (IWINAC). The works presented in this paper are excellent examples of new scientific discoveries made in laboratories that have successfully transitioned to real-life applications.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Zwiększenie trwałości rolek do formowania rur
Increasing tool life of rollers for roll forming of tubes
Autorzy:
Haduch Suski, Z.
Lozano Andrade, J.
García Rodríguez, A.
González, H. R.
Rodríguez, E.
Tematy:
rolki
stal narzędziowa
rury
obróbka cieplna
azotowanie
obróbka podzerowa
rolls
tool steels
tubes
heat treatment
nitriding
sub-zero treatment
Pokaż więcej
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:
https://bibliotekanauki.pl/articles/190630.pdf  Link otwiera się w nowym oknie
Opis:
Przemysł wytwarzania rur stosuje różne metody i techniki ich produkcji, jednak formowanie rur stalowych ze szwem ma największe osiągnięcia na rynku. Podstawowe narzędzie do ich formowania, czyli rolki są tradycyjnie wykonywane ze stali narzędziowych o wysokiej zawartości chromu, na przykład stali narzędziowej D2. Jednak jakość rur nowej generacji wykonywanych ze stali o wyższej wytrzymałości i twardości wymaga zastosowania nowych materiałów przewyższających właściwości mechaniczne stali D2. Zaistniała więc konieczność zmian technologii, przeprojektowania narzędzi, przebadania nowych materiałów i opracowania odpowiedniej obróbki cieplnej, zapewniając im dłuższą żywotność i zmniejszenie przestojów w celu spełnienia oczekiwań produkcyjnych. W niniejszym projekcie zostały przeanalizowane i ocenione najlepsze opcje przedstawione na rynku narzędzi do pracy na zimno w celu zwiększenia żywotności istniejących narzędzi (stal D2). Ocenę przeprowadzono w warunkach laboratoryjnych zbliżonych maksymalnie do parametrów produkcyjnych. Wykorzystano tester do badań tribologicznych (T-05) i wykonano badania dynamiczne (próba Charpy'ego). Wykazano przydatność nowych materiałów i możliwość uzyskania oszczędności.
Industries engaged in roll forming of tubes apply different methodologies and innovating technologies in order to perform this task, but tubes with welded seams are more profitable. The basic tooling used to roll-form tubes, or rolls, are usually made of a tool steel with a high Chromium content, namely, D2 steel. However, in order to produce higher quality tubes of high-strength steels, higher mechanical properties than those shown by D2 steel are required. As a consequence, new technologies, designs, materials, and heat treatments have emerged so the new requirements are met. This has a direct impact on the costs incurred and the productivity of metalmechanic industries. In this project, various cold work steels were analysed and compared with D2 steel, in order to improve the tool life of rolls for roll forming of tubes. Tribological testing was done with a T-05 block-on-ring setup with testing conditions similar to those in real life. Charpy testing was done in order to obtain impact toughness. The obtained results are of great importance, because they may result on significant cost reductions.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linking Traits and Personal Constructs: An Exploratory Study throughout Levels of Personality
Autorzy:
Martínez, Jesús García
Cano-García, Francisco J.
Rodríguez-Franco, Luis
Buero-Gallego, Milagros
Alcocer-Gómez, Elísabet
Guerrero-Gómez, Rafael
Tematy:
Personality
Levels of Personality
Traits
Personal Constructs
Big Five Model
Repertory Grid Technique
McAdams’ Model
Implicative Dilemmas
Pokaż więcej
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Powiązania:
https://bibliotekanauki.pl/articles/2128612.pdf  Link otwiera się w nowym oknie
Opis:
This article presents a preliminary study of links between personal constructs and traits. The conceptual framework for this study is the domains of personality model postulated by McAdams (1995) and McAdams & Pals (2006), and we tried to find concomitances between variables of two different levels, the dispositional level and the identity level. A repertory grid and the NEOFFI inventory were distributed to a total of 273 individuals, 146 representing the general population, and 137 having pathologies. By applying an exploratory design ex post facto in which Pearson’s correlations and ANOVAs were used, we found associations between the content of the constructs used and the traits. The neuroticism trait was most closely related to the content of the constructs. There were also clear associations between construct structure and scores on traits. Neurotic subjects were more rigid, whereas agreeable and conscientious subjects were more complex. However, the type of sample (normal or pathological) is a basic modulator of the relationships between constructs and traits.
Łączenie cech i konstruktów osobistych. Eksploracyjne studium poziomów osobowości This article presents a preliminary study of links between personal constructs and traits. The conceptual framework for this study is the domains of personality model postulated by McAdams (1995) and McAdams & Pals (2006), and we tried to find concomitances between variables of two different levels, the dispositional level and the identity level. A repertory grid and the NEOFFI inventory were distributed to a total of 273 individuals, 146 representing the general population, and 137 having pathologies. By applying an exploratory design ex post facto in which Pearson’s correlations and ANOVAs were used, we found associations between the content of the constructs used and the traits. The neuroticism trait was most closely related to the content of the constructs. There were also clear associations between construct structure and scores on traits. Neurotic subjects were more rigid, whereas agreeable and conscientious subjects were more complex. However, the type of sample (normal or pathological) is a basic modulator of the relationships between constructs and traits.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of SrTiO3 by the Calcination of SrCO3 and TiO2 Mixtures Intensively Ground by Means of High Energy Milling
Autorzy:
Rocha-Rangel, Enrique
Pech-Rodríguez, Wilian J.
López-Hernández, Juan
Calles-Arriaga, Carlos A.
Armendáriz-Mireles, Eddie N.
Castillo-Robles, José A.
Rodríguez-García, José A.
Tematy:
SrTiO3
mechanochemistry
insulating ceramics
perovskite
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/356247.pdf  Link otwiera się w nowym oknie
Opis:
A SrTiO3 electroceramic with perovskite structure was produced by the calcination of a mixture of SrCO3 and TiO2 intensively grounded by high energy milling. For this purpose, raw materials were mixed in stoichiometric amounts in a planetary type mill; the obtained powder mixture was calcined for 2 h at temperatures between 800 and 1300°C. Samples resulting from the calcination were characterized by XRD, FTIR, SEM analysis and electrical measurements. From XRD, it was determined that the SrTiO3 formed presents the cubic structure of perovskite. The complete reaction for SrTiO3 compound formation occurs at 1200°C. Micrograph observations indicate the presence of a homogeneous microstructure with tiny grain size. The measured values of electrical resistivity were within the typical range of insulating materials.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 44

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