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Tytuł:
A Case Study of the European Welfare System Model in the Post-communist Countries-Poland
Autorzy:
Golinowska, Stanisława
Powiązania:
https://bibliotekanauki.pl/articles/1929549.pdf
Data publikacji:
2009-06-30
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
European Social Model
welfare state regimes
Social Policy
social dialog
social protection
transformation (transition from the central planed to the market economy)
new member states of the EU
Opis:
The paper on European welfare regimes and policies presents common and shared features of the social development of the post-communist countries that are members of the EU today. This will provide a basis for an attempt to assess if there is a single regime for those countries that distinguishes them from the three classical (and later four) regimes of the Esping-Anderson classification, or if there is an affinity to one of those models en bloc, or if there is similarity to one of the regimes, but in a different way for each of the new EU members. This attempt will be made primarily on the example of Poland, but with salient references to other countries in the group. The basis of the thoughts presented here is that of a project on Diversity and Commonality in European Social Policies: The Forging of a European Social Model (Golinowska, Hengstenberg, Żukowski 2009). Considerations and analysis done in the paper lead into conclusions that social policy development in the new member states is characterized by a one social model distinguishing them differently than according to the Esping-Andersen classification, in spite of a some differences in the outcome of the social policy being pursued. Similarities are mainly of an institutional character, resulting from both the similar past and the similar challenges connected with the systemic transformation towards the democratic system and market economy. In the future this specificity may fade and integration within the EU will cause a Europeanization of social policy of member states, but now this process is not sufficiently advanced.
Źródło:
Polish Sociological Review; 2009, 166, 2; 273-296
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A finite-strain model for a superelastic NiTi shape memory alloy
Autorzy:
Jiang, Dongjie
Xiao, Yao
Powiązania:
https://bibliotekanauki.pl/articles/29520079.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
shape memory alloy
martensitic transformation
finite-strain constitutive model
Lüders-like deformation
Opis:
A finite-strain constitutive model of a superelastic NiTi shape memory alloy is proposed in this paper. Via backward Euler implicit integration scheme and the incorporation of material softening, the model is implemented into finite element code to reproduce a Lüders like deformation of a superelastic NiTi. The simulation results are in agreement with the experimental results, indicating that the constitutive model can reasonably predict the mechanical behavior of a superelastic NiTi. A parametric study further verifies that the magnitude of softening modulus has a significant effect on the stress-strain response and Lüders-like deformation of a superelastic NiTi.
Źródło:
Computer Methods in Materials Science; 2022, 22, 1; 23-30
2720-4081
2720-3948
Pojawia się w:
Computer Methods in Materials Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Framework for the Regression Testing of Model-to-Model Transformations
Autorzy:
Al-Azzoni, Issam
Iqbal, Saqib
Powiązania:
https://bibliotekanauki.pl/articles/1818477.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
model transformation
regression testing
MDE
Model Driven Engineering
Opis:
Background: Model transformations play a key role in Model-Driven Engineering (MDE). Testing model transformation is an important activity to ensure the quality and correctness of the generated models. However, during the evolution and maintenance of these model transformation programs, frequently testing them by running a large number of test cases can be costly. Regression test selection is a form of testing, which selects tests from an existing test suite to test a modified program. Aim: The aim of the paper is to present a test selection approach for the regression testing of model transformations. The selected test case suite should be smaller in size than the full test suite, thereby reducing the testing overhead, while at the same time the fault detection capability of the full test suite should not be compromised. Method: approach is based on the use of a traceability mapping of test cases with their corresponding rules to select the affected test items. The approach is complemented with a tool that automates the proposed process. Results: Our experiments show that the proposed approach succeeds in reducing the size of the selected test case suite, and hence its execution time, while not compromising the fault detection capability of the full test suite. Conclusion: The experimental results confirm that our regression test selection approach is cost-effective compared to a retest strategy.
Źródło:
e-Informatica Software Engineering Journal; 2021, 15, 1; 65--84
1897-7979
Pojawia się w:
e-Informatica Software Engineering Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A locally modified single-phase model for analyzing magnetohydrodynamic boundary layer flow and heat transfer of nanofluids over a nonlinearly stretching sheet with chemical reaction
Autorzy:
Akbarzadeh, P.
Powiązania:
https://bibliotekanauki.pl/articles/949119.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
nanofluid
magnetohydrodynamic
nonlinear stretching sheet
similarity transformation
locally modified single-phase model
Opis:
The problem of boundary layer flow and heat transfer of nanofluids over nonlinear stretching of a flat sheet in the presence of a magnetic field and chemical reaction is investigated numerically. In this paper, a new locally modified single-phase model for the analysis is introduced. In this model, the effective viscosity, density and thermal conductivity of the solid-liquid mixtures (nanofluids) which are commonly utilized in the homogenous single-phase model, are locally combined with the prevalent single-phase model. Similarity transformation is used to convert the governing equations into three coupled nonlinear ordinary differential equations. These equations depend on five local functions of the nanoparticle volume fraction viz., local viscosity ratio, magnetic, Prandtl, Brownian motion and thermophoresis functions. The equations are solved using Newton’s method and a block tridiagonal matrix solver. The results are compared to the prevalent single-phase model. In addition, the effect of important governing parameters on the velocity, temperature, volume fraction distribution and the heat and mass transfer rates are examined.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 1; 81-94
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A UML 2.0 activity diagrams/csp integrated approach for modeling and verification of software systems
Autorzy:
Elmansouri, Raida
Meghzili, Said
Chaoui, Allaoua
Powiązania:
https://bibliotekanauki.pl/articles/2097950.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
model-driven engineering
graph transformation
transformation correctness
model checker
groove
software systems
Opis:
This paper proposes an approach that integrates UML 2.0 Activity Diagrams (UML2-ADs) and the communicating sequential process (CSP) for modeling and verifying software systems. A UML2-AD is used for modeling a software system, while a CSP is used for verification purposes. The proposed approach consists of another way of transforming UML2-AD models to CSP models. It also focuses on checking the correctness of some properties of the transformation itself. These properties are specified using linear temporal Logic (LTL) and verified using the GROOVE model checker. This approach is based on model -driven engineering (MDE). The meta-modeling is realized using the AToMPM tool, while the model transformation and the correctness of its properties are realized using the GROOVE tool. Finally, we illustrated this approach through a case study.
Źródło:
Computer Science; 2021, 22 (2); 209-233
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An adaptive observer design approach for a class of discrete-time nonlinear systems
Autorzy:
Srinivasarengan, K.
Ragot, J.
Aubrun, C.
Maquin, D.
Powiązania:
https://bibliotekanauki.pl/articles/330844.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
adaptive observer
joint state estimation
parameter estimation
Takagi-Sugeno model
time-varying parameter estimation
sector nonlinearity transformation
discrete-time nonlinear systems
obserwator adaptacyjny
identyfikacja parametrów
model Takagi-Sugeno
transformacja nieliniowa
dyskretny układ nieliniowy
Opis:
We consider the problem of joint estimation of states and some constant parameters for a class of nonlinear discrete-time systems. This class contains systems that could be transformed into a quasi-LPV (linear parameter varying) polytopic model in the Takagi–Sugeno (T–S) form. Such systems could have unmeasured premise variables, a case usually overlooked in the observer design literature. We assert that, for such systems in discrete-time, the current literature lacks design strategies for joint state and parameter estimation. To this end, we adapt the existing literature on continuous-time linear systems for joint state and time-varying parameter estimation. We first develop the discrete-time version of this result for linear systems. A Lyapunov approach is used to illustrate stability, and bounds for the estimation error are obtained via the bounded real lemma. We use this result to achieve our objective for a design procedure for a class of nonlinear systems with constant parameters. This results in less conservative conditions and a simplified design procedure. A basic waste water treatment plant simulation example is discussed to illustrate the design procedure.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 55-67
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Building a bankruptcy prediction model : could information about past development increase model accuracy?
Budowanie modelu prognozowania upadłościowego : czy informacje dotyczące dotychczasowego rozwoju mogą zwiększyć dokładność modelu?
Autorzy:
Karas, M.
Režňáková, M.
Powiązania:
https://bibliotekanauki.pl/articles/405660.pdf
Data publikacji:
2018
Wydawca:
Politechnika Częstochowska
Tematy:
construction companies
bankruptcy prediction
dynamic indicators
model accuracy
multi-period transformation
firmy budowlane
prognoza upadłości
wskaźniki dynamiczne
dokładność modelu
transformacja w wielu okresach
Opis:
In most cases, bankruptcy models are based on financial indicators that describe the current condition or a certain area of financial health, such as profitability, indebtedness and so on, but they do not report on relevant past development. The main question of the research presented in this paper is whether information about past development could enhance the prediction accuracy of the bankruptcy prediction model. The aim of our research is to analyse the partial potential of financial indicators describing past development. Given that the threat of company bankruptcy is the result of a long-term process, the question arises as to whether it is possible to enhance the accuracy of a bankruptcy prediction model by using indicators monitoring the development of the company in the past. On a sample of 1,355 small and medium-sized Czech construction companies were taken into account during the period of 2011-2014. The study analysed two types of indicators - basic-form and change-form indicators. Basic-form indicators show the status of an indicator at a specific point in time; change-form indicators represent a modified base index of the basic-form ratio. The authors derived six different models for the purpose of comparing the two types of indicators. The authors used the method of stepwise discriminant analysis, both forward selection and backward elimination, to create the models. The accuracies of the resultant models were analysed using the methods of ROC curves and the Area Under Curve (AUC). The authors found that the model based solely on change-form indicators is not superior to the model based solely on basic-form indicators. However, the model using both types of indicators achieved a higher AUC in comparison with the models created with only one type of indicator.
W większości przypadków modele upadłości opierają się na wskaźnikach finansowych, które opisują obecny stan lub pewien obszar kondycji finansowej, takie jak rentowność, zadłużenie itd., ale nie zawierają informacji na temat istotnego wcześniejszego rozwoju. Głównym zagadnieniem badań przedstawionych w tym artykule jest to, czy informacje na temat wcześniejszego rozwoju mogą zwiększyć dokładność prognozowania modelu prognozowania upadłości. Celem naszych badań jest analiza częściowego potencjału wskaźników finansowych opisujących dotychczasowy rozwój. Biorąc pod uwagę, że groźba bankructwa firmy jest wynikiem długotrwałego procesu, pojawia się pytanie, czy możliwe jest zwiększenie dokładności modelu przewidywania bankructwa za pomocą wskaźników monitorujących rozwój firmy w przeszłości. Badania przeprowadzono w okresie 2011-2014 na próbie 1355 małych i średnich czeskich firm budowlanych. W badaniu przeanalizowano dwa rodzaje wskaźników - wskaźniki w formie podstawowej i zmienionej. Wskaźniki w formie podstawowej pokazują status wskaźnika w określonym momencie; wskaźniki w formie zmienionej reprezentują zmodyfikowany wskaźnik bazowy współczynnika w formie podstawowej. Autorzy wyprowadzili sześć różnych modeli w celu porównania obu typów wskaźników. Autorzy wykorzystali metodę krokowej analizy dyskryminacyjnej, zarówno do wyboru w przód, jak i do eliminacji wstecznej, w celu stworzenia modeli. Dokładności uzyskanych modeli analizowano za pomocą metod krzywych ROC i obszaru pod krzywą (AUC). Autorzy stwierdzili, że model oparty wyłącznie na wskaźnikach zmian nie jest lepszy od modelu opartego wyłącznie na wskaźnikach podstawowych. Jednak model wykorzystujący oba typy wskaźników osiągnął wyższy obszar pod krzywą w porównaniu z modelami utworzonymi przy użyciu tylko jednego rodzaju wskaźnika.
Źródło:
Polish Journal of Management Studies; 2018, 17, 1; 116-130
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Business model transformation during the COVID-19 pandemic - example of the automotive industry
Autorzy:
Dobrowolska, Emilia
Sliż, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2231200.pdf
Data publikacji:
2023-07-20
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
business model
business model transformation
dealership
automotive industry
COVID-19
Opis:
This article explores the impact of the COVID-19 epidemic on the business models of automotive-sector organizations, specifically authorized passenger car dealerships in Poland. The research aims to determine how business models were transformed during the pandemic. The research methods used include a literature review and opinion polls. The article begins by discussing the significance and evolution of business models and changes in the automotive sector. The results focus on how the pandemic brought about change in business models in the automotive sector, and the conclusion includes information as to limitations and further areas of study.
Źródło:
e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie; 2023, 99, 2; 69-82
1731-6758
1731-7428
Pojawia się w:
e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comprehensive Evaluation Cloud Model for Ship Navigation Adaptability
Autorzy:
Zhu, M.
Wen, Y.
Zhou, C.
Xiao, C.
Powiązania:
https://bibliotekanauki.pl/articles/115973.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
cloud computing
Cloud Model
marine navigation
Delphi
Qualitative Description
Quantitative Transformation
Cloud Algorithm
Fuzzy Comprehensive Evaluation Method
Opis:
In this paper, using cloud model and Delphi, we build a comprehensive evaluation cloud model to solve the problems of qualitative description and quantitative transformation in ship navigation adaptability comprehensive evaluation. In the model, the normal cloud generator is used to find optimal cloud models of reviews and evaluation factors. The weight of each evaluation factor is determined by cloud model and Delphi. The floating cloud algorithm is applied to aggregate the bottom level’s evaluation factors, and comprehensive cloud algorithm is used to aggregate the highest level’s evaluation factors to get comprehensive evaluation cloud model. Finally, evaluation result is got by matching comprehensive evaluation cloud model and optimal cloud model of reviews. As case study, the model is applied to the small LNG ship’s navigation adaptability in Southeast Asia. Compared with the fuzzy comprehensive evaluation method, the model proposed in this paper is more intuitive and reliable in comprehensive evaluation of the small LNG ship’s navigation adaptability.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 3; 331-336
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Current and future roles in the social economy and the COVID-19 crisis
Obecne i przyszłe role w ekonomii społecznej a kryzys COVID-19
Autorzy:
Kawęcki, Norbert
Powiązania:
https://bibliotekanauki.pl/articles/23051071.pdf
Data publikacji:
2022-09-26
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
gospodarka społeczna
kryzys
COVID-19
model biznesowy
transformacja
social economy
crisis
business model
transformation
Opis:
“The social economy” has played an important role in addressing and mitigating the short- and long-term economic and social impacts of the COVID-19 crisis. In the short term, social economy actors helped emerge from the crisis by providing innovative solutions to strengthen public services to complement government action. In the longer term, social economy organizations can help transform the post-crisis economy by promoting inclusive and sustainable economic models. Relying on decades of experience, its peculiarities and fundamental principles, the social economy can inspire models for social innovation and a sense of business operating in a market economy. The aim of this article is to show how the social economy is mitigating the effects of the COVID-19 crisis and how governments are responding to these problems, as well as to show how the pandemic has caused numerous changes in economic activity and the way companies operate. The main conclusions of the article are: the social economy helps recover from COVID-19, the social economy helps to transform societies in crisis, the social economy inspires the mainstream economy to achieve a social goal, Policy makers support the political economy in its transformation.
„Ekonomia społeczna” odegrała ważną rolę w rozwiązywaniu i łagodzeniu krótko- i długoterminowych skutków gospodarczych i społecznych kryzysu wywołanego COVID-19. W perspektywie krótkoterminowej podmioty ekonomii społecznej pomogły wyjść z kryzysu, dostarczając innowacyjne rozwiązania wzmacniające usługi publiczne w celu uzupełnienia działań rządowych. W dłuższej perspektywie organizacje ekonomii społecznej mogą pomóc w przekształceniu gospodarki pokryzysowej dzięki promowaniu integracyjnych i zrównoważonych modeli ekonomicznych. Opierając się na dziesięcioleciach doświadczeń, swoich osobliwościach i fundamentalnych zasadach, ekonomia społeczna może inspirować modele innowacji społecznych i poczucia biznesu działającego w gospodarce rynkowej. Celem niniejszego artykułu jest pokazanie, w jaki sposób ekonomia społeczna łagodzi skutki kryzysu COVID-19 i jak rządy reagują na te problemy, a także jak pandemia spowodowała liczne zmiany w działalności gospodarczej i obsłudze firm. Główne wnioski płynące z artykułu to: ekonomia społeczna umożliwia wyjście z COVID-19, ekonomia społeczna pomaga przekształcać społeczeństwa w kryzysie, ekonomia społeczna inspiruje ekonomię głównego nurtu do osiągnięcia celu społecznego, politycy wspierają ekonomię polityczną w jej transformacji.
Źródło:
Nowoczesne Systemy Zarządzania; 2022, 17, 3; 49-64
1896-9380
2719-860X
Pojawia się w:
Nowoczesne Systemy Zarządzania
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Digital transformation: theoretical backgrounds of digital change
Transformacja cyfrowa: teoretyczne aspekty zmian cyfrowych
Autorzy:
Tratkowska, Kamila
Powiązania:
https://bibliotekanauki.pl/articles/420028.pdf
Data publikacji:
2019
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
digital transformation
digitization
VUCA
Digital Maturity Model
transformacja cyfrowa
digitalizacja
model dojrzałości cyfrowej
Opis:
The purpose of this paper is a review of the existing definitions of digital transformation (abbrev. DT) and to structure its implications for new business models and implementation activities. This article was inspired by literature review whose main aim was to provide insight into the understanding of the theoretical background of digital transformation by means of the digitization and current megatrends in the VUCA world. The author gives examples, completes the literature research and shows the theoretical aspects of concepts, as well briefly analyzes the trends concerning DT. The article starts from definitions of DT, through digital readiness, to efficiency in the DT area. The main findings are that the approach for the structured digitization of business models is expanding, several excellence models have been developed over the past few years, and the implementation model for DT becomes a widely known concept. The author offers a clear definition, which corresponds to phases for DT of business models using a Digital Capability Maturity Models overview. Moreover, this paper is the author’s declaration of further DT’s research in its practical dimension.
Celem niniejszego artykułu jest przegląd istniejących definicji transformacji cyfrowej (DT) oraz wskazanie jej wpływu na nowe modele biznesowe i związane z nimi działania wdrożeniowe. Artykuł został zainspirowany przeglądem literatury – głównym zadaniem było nakreślenie tła teoretycznego poprzez rozwinięcie pojęć, takich jak digitalizacja i megatrendy w świecie VUCA. Autorka podaje przykłady, uzupełnia badania literatury, wskazując na teoretyczne aspekty transformacji cyfrowej, a także analizuje związane z nią trendy. Artykuł rozpoczyna się od definicji transformacji, a następnie omawiane są zagadnienia gotowości cyfrowej oraz wydajności. W dokonanym przeglądzie literaturowym autorka wykazała, że ustrukturyzowane podejście do cyfryzacji w modelach biznesowych wzrasta. W ciągu ostatnich kilku lat opracowano kilka modeli doskonałości cyfrowej, a modele wdrażania transformacji zyskują na popularności. W artykule zaproponowano definicję, która formułuje fazy DT z wykorzystaniem przeglądu modeli dojrzałości możliwości cyfrowych.
Źródło:
Nauki o Zarządzaniu; 2019, 24, 4; 34-37
2080-6000
Pojawia się w:
Nauki o Zarządzaniu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Editorial paper: Business Model Innovation – A Concept Between Organizational Renewal and Industry Transformation
Autorzy:
Freiling, Jörg
Powiązania:
https://bibliotekanauki.pl/articles/475093.pdf
Data publikacji:
2015
Wydawca:
Fundacja Upowszechniająca Wiedzę i Naukę Cognitione
Tematy:
Business Model Innovation Organizational Renewal
Industry Transformation
Opis:
With the new millennium and the hype of electronic business a new movement was created that still gains momentum: business model innovations. Deeply influenced by business informatics in the early years, business models and business model innovations became a pervasive part of our business life. Particularly business model innovations opened the door for a thinking far beyond product and process innovations. By considering new ways of designing value propositions, value-added architectures and sales modes (e.g. Timmers, 1998), business model innovations became an attractive option of recent innovation management and strategic management of the entrepreneurial kind as well. Especially small- and medium-sized entities (SMEs) found a new way to innovate without spending too much resources in uncertain investments. Once successfully implemented, business model innovations on the micro level drive organizational renewal and/or help in developing new businesses. More than that, business model innovations may change the ‘rules of the game’ in markets and trigger processes of industry transformation (Porter & Rivkin, 2000) on the macro level. Despite the considerable power of business model innovations, not every innovative business model is a ‘home-run’. Empirical evidence suggests (e.g. Freiling & Dressel, 2014) that sophisticated new business models promise ‘win-win’ constellations for both customers and suppliers, but face the problem of limited adoption in target markets. Insofar, the implementation goes along with numerous obstacles. Little is said about the root causes of these obstacles and the ways how to cope with these challenges. Many of the articles of this special issue address the background of business model innovations and open the door to new debates. This illuminates the rather inter-disciplinary nature of business model innovations that deal with different kinds of novelties for both suppliers and customers. Based on Schumpeter (1934), innovations may relate to products, processes, organizational modes as well as novel purchasing and distribution modes. These novelties are often interrelated and call for an over-arching frame. If well designed, business models can be such umbrellas and are, thus, useful elements of innovation and strategic management. More than that, they push forward the notion of systemic innovation as a core challenge for both strategic decision-making and innovation. The papers deal with both customers and suppliers, as innovation cannot be separated from adoption processes in markets. In this regard, some former background issues come to the fore in this special issue, such as the still under-researched role of emotions (cf. Straker and Wrigley, 2015) and the role of diversity of people (particularly in the light of different cultural backgrounds – cf. Harima and Vemuri, 2015). Innovating business models is among the priorities of leading companies in most recent times to keep a certain balance of value creation and value capture (Teece, 2010; Zott et al. 2011). While business model innovations require particular capabilities to develop new industry architectures (Jacobides et al., 2006; Freiling et al., 2008), business model innovation is a challenge that often returns to top positions of the management agenda. To change from one business model to another, however, is a different and often even more demanding challenge that is based on dynamic capabilities (Teece, 2007). By dynamic capabilities companies are able to sense and seize new business opportunities and to reconfigure the company. The bare existence of dynamic capabilities allows changing business models more proficiently and, thus, tapping the potential of new business opportunities (Müller and Vorbach, 2015). However, while business model innovations have played a role in the entire economy in recent years, there are contexts where these innovative moves find a very fertile background. Without necessarily excluding other companies, particularly young firms seem to belong to these settings. Insofar, entrepreneurship and business model innovations are closely linked. One reason for this may be that incumbents are locked in their everyday business, reinforced by specific investments, and do not find enough time to go substantially beyond that. Thus, they are prone to attacks based on innovative business models of start-ups that are in need of doing something new and different to start launching their solutions in target markets. Entrepreneurship practice is full of examples where new ventures translated a basic innovation into a business model innovation to ‘make’ a market (e.g. Facebook, Amazon, Cirque du Soleil). The multitude of different ventures is hard to describe exhaustively, if it is possible at all. In this regard, it makes a difference whether the ventures are profit-oriented or non-profit ones. Papers of this special issue deal especially with this question (Jokela and Elo, 2015; Balboni and Bortoluzzi, 2015). On a more pragmatic level, the question arises how to visualize the real nature of business models and how to plan and implement them. In literature, there is a huge variety of understandings – like Timmers’ (1998) model of three business model components, the Morris et al. (2005) six-element approach or the nine-component ‘business model canvas’ framework of Osterwalder and Pigneur (2010). In this special issue, many articles adopted the more fine- grained business model canvas approach that already penetrated business practice to some extent.
Źródło:
Journal of Entrepreneurship, Management and Innovation; 2015, 11, 1; 3-10
2299-7075
2299-7326
Pojawia się w:
Journal of Entrepreneurship, Management and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of parameters of forms of bending oscillations of a body by results of vibrating tests with application of the theory of optimum filtration and linear regression models
Ocena parametrów form drgań zginających pudła wagonu na podstawie wyników badań wibracji z zastosowaniem teorii optymalnej filtracji i modeli regresji liniowej
Autorzy:
Lyapshin, K.
Vuchetich, I.
Powiązania:
https://bibliotekanauki.pl/articles/374755.pdf
Data publikacji:
2010
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
samochód osobowy
nadwozie samochodowe
drgania pojazdu
filtr nierekursywny
transformata Fouriera
model liniowej regresji
car
car body
vibration of car
nonrecursive filter
Fourier transformation
linear regression model
Opis:
Three different passenger car bodies' vibration tests were carried out. During the tests simultaneously were register accelerations, body middle displacements and strength from vibrator to a body. On processing of testing signal was decrease its sampling frequency and used nonrecursive filter with Fourier transformation. Signal parameter estimation for first self frequency of bending vibration determination was carried out with four linear regression models according to quadratic mean criteria with pass from discrete to continuous model. Was carried out each model estimation results analyses and did conclusions about processing methods error and noise attend in measurement system.
Źródło:
Transport Problems; 2010, 5, 2; 13-19
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of the hazard rate function with a reduction of bias and variance at the boundary
Autorzy:
Janiszewska, Bożena
Różański, Roman
Powiązania:
https://bibliotekanauki.pl/articles/729696.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
hazard rate function
multiplicative intensity point process model
Ramlau-Hansen kernel estimator
reduction of the bias
reflection
transformation
Opis:
In the article, we propose a new estimator of the hazard rate function in the framework of the multiplicative point process intensity model. The technique combines the reflection method and the method of transformation. The new method eliminates the boundary effect for suitably selected transformations reducing the bias at the boundary and keeping the asymptotics of the variance. The transformation depends on a pre-estimate of the logarithmic derivative of the hazard function at the boundary.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2005, 25, 1; 5-37
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extension of a phase transformation model for partial hardening in hot stamping
Autorzy:
Hart-Rawung, T.
Buhl, J.
Bambach, M.
Powiązania:
https://bibliotekanauki.pl/articles/99913.pdf
Data publikacji:
2018
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
coefficient of thermal expansion
phase transformation model
hot stamping
Opis:
The quality of predicted microstructural and mechanical properties in hot stamping simulations relies considerably on the material model. Many researchers studied the effect of the plastic deformation on the phase transformation of the most commonly used hot stamping steel 22MnB5, and proved that the deformation applied at high temperature promotes the formation of ferrite, pearlite and bainite. This behaviour has to be integrated into materials modelling. In this study, the effect of pre-strain on the phase transformation of the material is considered. The specimens are heated to austenitization temperature, isothermally deformed at 700°C, and quenched down to room temperature. The phase fractions and the temperature-dilatation behaviour obtained from the experiments are used to calibrate the material model. By using the experimental data obtained from dilatometer testing, the accuracy of the material model is evaluated. Additionally, an attempt to predict the results between the tested data points by using interpolation was made and compared with the simulation results.
Źródło:
Journal of Machine Engineering; 2018, 18, 3; 87-97
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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