Search results for " Transformation"
showing 10 items of 1043 documents
Weyl's theorem for perturbations of paranormal operators
2007
A bounded linear operator T ∈ L(X) on a Banach space X is said to satisfy "Weyl's theorem" if the complement in the spectrum of the Weyl spectrum is the set of all isolated points of the spectrum which are eigenvalues of finite multiplicity. In this paper we show that if T is a paranormal operator on a Hilbert space, then T + K satisfies Weyl's theorem for every algebraic operator K which commutes with T.
Reaching for different ends through tenure track—institutional logics in university career systems
2020
AbstractIn this study, we used the institutional logics perspective to identify the logics underpinning the tenure track career system, how the logics manifest themselves in recruitment and performance management and how academic leaders and academics negotiate between the logics. The study contributes to research on governance dynamics in academia and to universities’ organisational transformation in the context of strategic actorhood. The data comprised interviews with academic leaders (vice-rectors, deans, department heads) and academics in tenure track positions at two Finnish universities. Empirically, the study explores two key areas of human resource management: recruitment and perfo…
Automatic Reengineering in MDA Using Rewriting Logic as Transformation Engine
2005
Legacy systems are information systems that have been developed by means of methods, tools and database management systems that have become obsolete, but they are still being used due to their reliability. As time goes on, the maintenance of this software becomes more complex, expensive and painful. The MOMENT framework supports automatic formal model transformations in MDA. This model transformation approach is based on the algebraic specification of models and benefits from mature term rewriting system technology to perform model transformation using rewriting logic. In this paper, we present how we apply this formal transformation mechanism to recover a legacy relational database, obtain…
Min-max control of uncertain multi-inventory systems with multiplicative uncertainties
2001
In this note, we consider production-distribution systems with buffer and capacity constraints. For such systems, we assume that the model is not known exactly. More precisely, the entries of the matrix representing the system structure may be affine functions of some uncertain time-varying parameters that take values within assigned bounds. We give stabilizability conditions that can be checked, in principle, by solving a min-max problem on the surface of the state-space (buffer level space) unit ball. Then, we consider a special case in which each uncertain parameter affects a single column of the system matrix and is independent of all the other ones. In this case, we propose a mixed int…
Unitary transformations depending on a small parameter
2011
We formulate a unitary perturbation theory for quantum mechanics inspired by the LieDeprit formulation of canonical transformations. The original Hamiltonian is converted into a solvable one by a transformation obtained through a Magnus expansion. This ensures unitarity at every order in a small parameter. A comparison with the standard perturbation theory is provided. We work out the scheme up to order ten with some simple examples.
The Orchestra of Multiple Model Repositories
2013
This paper motivates and encourages the simultaneous use of multiple model repositories in model-driven software. A multi-repository mechanism is proposed for that. With this mechanism, multiple model repositories residing in the same or different technical spaces can be mounted into a single repository (in the same sense as file systems are mounted in UNIX) and accessed in a uniform way. Relations (including generalizations) between elements from the mounted repositories are supported. Some of the repositories may be “computable” (virtual), which leads to the on-the-fly model transformation concept.
Las grandes exposiciones del siglo XXI frente a la fragilidad del territorio
2019
Las exposiciones no son eventos autónomos ni homogéneos, al contrario, su desarrollo constituye la trama de una historia discontinua, el espejo de una sociedad en evolución que experimenta sus reglas y sus paradigmas, mostrándolos a la sociedad. A través de cartografía y bibliografía específica, además de las experiencias personales de los autores, se analizan los eventos de Hannover (2000) que marca el comienzo de las exposiciones del presente siglo, Shanghái (2010), y Milán (2015) para comprender los efectos que los eventos expositivos tienen sobre la transformación de la ciudad y del territorio, en un momento en el cual existe una renovada preocupación sobre el devenir de las ciudades, s…
Human Papilloma Virus-Dependent HMGA1 Expression Is a Relevant Step in Cervical Carcinogenesis
2008
HMGA1 is a member of a small family of architectural transcription factors involved in the coordinate assembly of multiprotein complexes referred to as enhanceosomes. In addition to their role in cell proliferation, differentiation, and development, high-mobility group proteins of the A type (HMGA) family members behave as transforming protoncogenes either in vitro or in animal models. Recent reports indicated that HMGA1 might counteract p53 pathway and provided an interesting hint on the mechanisms determining HMGA's transforming potential. HMGA1 expression is deregulated in a very large array of human tumors, including cervical cancer, but very limited information is available on the mole…
Managing digital transformation: The view from the top
2022
Digital Transformation is upending businesses everywhere. While there is ample research on this topic, there is a clear gap when it comes to understanding the changing talent management role of senior executives in digital transformation processes and the demands of individual employees. This article relies on 23 in-depth interviews with senior managers who are leading all or some of the digital transformation efforts of their respective organizations. Our research, using a grounded theory approach, identifies four key activities (and 37 sub-activities or themes) stemming from the new managerial needs and talent management practices arising from DT processes. We branded these key activities…
Vampīrs un tā transformācija Annas Raisas romānā “Intervija ar vampīru” un tā ekranizācijā
2016
Vampīru tēma tiek plaši pētīta, un vampīra tēls ir kļuvis par nozīmīgu mūsdienu kultūras daļu. Šis maģistra darbs pēta vampīru Annas Raisas romānā un tā ekranizācijā, izmantojot tādus ar vampīrismu saistītus galvenos aspektus un elementus kā asinis, seksualitāte un eroticisms, nāve, identitāte un citādais, lai noteiktu, kādas vampīram raksturīgās iezīmes Raisa ir izmantojusi un kādas ir ieviesusi, tādējādi mainot priekšstatu par vampīru literatūrā un filmās. Iegūtie pētījuma rezultāti ļauj secināt, ka Raisas radītajam vampīram piemīt tādas agrīnajam vampīra tēlam raksturīgās pazīmes kā pievilcība, pārdabiskas spējas un nepieciešamība pēc asinīm, taču galvenā atšķirīgā iezīme ir tā cilvēcisk…