Search results for "PROPERTY"
showing 10 items of 955 documents
Minimal star-varieties of polynomial growth and bounded colength
2018
Abstract Let V be a variety of associative algebras with involution ⁎ over a field F of characteristic zero. Giambruno and Mishchenko proved in [6] that the ⁎-codimension sequence of V is polynomially bounded if and only if V does not contain the commutative algebra D = F ⊕ F , endowed with the exchange involution, and M , a suitable 4-dimensional subalgebra of the algebra of 4 × 4 upper triangular matrices , endowed with the reflection involution. As a consequence the algebras D and M generate the only varieties of almost polynomial growth. In [20] the authors completely classify all subvarieties and all minimal subvarieties of the varieties var ⁎ ( D ) and var ⁎ ( M ) . In this paper we e…
Polynomial growth and star-varieties
2016
Abstract Let V be a variety of associative algebras with involution over a field F of characteristic zero and let c n ⁎ ( V ) , n = 1 , 2 , … , be its ⁎-codimension sequence. Such a sequence is polynomially bounded if and only if V does not contain the commutative algebra F ⊕ F , endowed with the exchange involution, and M, a suitable 4-dimensional subalgebra of the algebra of 4 × 4 upper triangular matrices. Such algebras generate the only varieties of ⁎-algebras of almost polynomial growth, i.e., varieties of exponential growth such that any proper subvariety is polynomially bounded. In this paper we completely classify all subvarieties of the ⁎-varieties of almost polynomial growth by gi…
A VR/AR Environment for Multi-User Liver Anatomy Education
2021
We present a Virtual and Augmented Reality multi-user prototype of a learning environment for liver anatomy education. Our system supports various training scenarios ranging from small learning groups to classroom-size education, where students and teachers can participate in virtual reality, augmented reality, or via desktop PCs. In an iterative development process with surgeons and teachers, a virtual organ library was created. Nineteen liver data sets were used comprising 3D surface models, 2D image data, pathology information, diagnosis and treatment decisions. These data sets can interactively be sorted and investigated individually regarding their volumetric and meta information. The …
On the Returns to Invention within Firms: Evidence from Finland
2018
International audience; In this paper we merge individual income data, firm-level data, patenting data, and IQ data in Finland over the period 1988–2012 to analyze the returns to invention for inventors and their coworkers or stakeholders within the same firm. We find that: (i) inventors collect only 8 percent of the total private return from invention; (ii) entrepreneurs get over 44 percent of the total gains; (iii) bluecollar workers get about 26 percent of the gains and the rest goes to white-collar workers. Moreover, entrepreneurs start with significant negative returns prior to the patent application, but their returns subsequently become highly positive.
Knowledge as a fictitious commodity: a Polanyian reading of the 'digital economy'
2020
Since the 2008 financial crisis, the attempts to use Karl Polanyi's framework to make sense of current developments have multiplied, producing a noticeable and lively debate. This debate centres on the notion of double movement put forward by the Hungarian thinker in his masterpiece – The Great Transformation. The paper is a contribution to this debate. The first part addresses a series of questions that make the interpretations of the double movement advanced so far not very compelling. To this end, a close reading of Polanyi's text, with the aim of dismantling and rearticulating its analytical structure, is carried out. The upshot is a dynamic and multistage picture of the double process …
Polanyi's double movement and the making of the ‘knowledge economy'
2019
In this chapter, we want to re-evaluate the heuristic role of Polanyi’s double movement by suggesting an alternative reading that could answer several criticisms that have been levelled against it. Moreover, we believe that this reading can give us greater insight into both the nature of the current crisis and its failure to unravel the neoliberal consensus.1 According to our reading, since the Speenhamland measures introduced in 1795 in Britain, faulty welfarist solutions have had the ability to undermine the political force of countermovements calling for protective measures while helping pro-market coalitions to periodically regenerate themselves. For us, this means that the future resol…
On the Kneser property for reaction–diffusion systems on unbounded domains
2009
Abstract We prove the Kneser property (i.e. the connectedness and compactness of the attainability set at any time) for reaction–diffusion systems on unbounded domains in which we do not know whether the property of uniqueness of the Cauchy problem holds or not. Using this property we obtain that the global attractor of such systems is connected. Finally, these results are applied to the complex Ginzburg–Landau equation.
Continuous Improvement Challenges: Implementing PBL in One University in Romania
2020
Abstract What do business and education have in common when it comes to continuous improvements? The answer is Lean Principles. Case studies and implementation challenges from some pilot PBL projects in one university, in Romania, are analysed and described in depth, while comparing the educational experience in the university to the challenges and resistance to change that facilitators in the private sector face inside their own companies. Taking this into consideration and based on qualitative data retrieved from interviews carried out in the private sector and in the educational sector, the authors of this paper will present deep insights that are meant to serve as a basis for understand…
Lattices of Jordan algebras
2010
AbstractCommutative Jordan algebras play a central part in orthogonal models. The generations of these algebras is studied and applied in deriving lattices of such algebras. These lattices constitute the natural framework for deriving new orthogonal models through factor aggregation and disaggregation.
An integrated analysis of land market in an inland area of Sicily
2013
In this study a land market analysis of the 22,000 hectares covered by Corleone town area for the 2007-2012 period was carried out. Data on 372 sales agreements concerning agricultural and building land were directly collected from notaries' offices. Over 50% of land sales concerned land areas below 0.50 hectares, whereas just 1% of the overall land sold was larger than 10 hectares. Nearly 75% of sample observations were represented by land sales smaller than 1 hectare. The average land area per purchase was just over 1 hectare. The overall money exchanged in the whole period amounted to nearly 6 million euro, with an average price per sale equal to 16,339.45 (sic), and an average unitary p…