Search results for "TTR"
showing 10 items of 3945 documents
Sophisticated humor against Covid: the Polish case
2021
The analysis undertaken in the article focuses on a group of memes selected from the database which drew on culture-specific references. Specifically, they embrace the memories of socialist times and call on references to comic films and easily recognized characters in order to bring out the re-discovered absurdity of the current Covid situation. This material seems ideal to revisit Raskin’s early notion of sophistication, which was broadly argued to derive from intertextuality as well complexity of references that function as sources of humor. In all the examples discussed we can observe the intertextual and metatextual elements, multiple levels and shifts in points of view and attitudes a…
Sesquiterpene compounds from Inula Viscosa
2007
Two new compounds, 2,5-dihydroxyisocostic acid and 2,3-dihydroxycostic acid together with three known sesquiterpene compounds, Isocostic acid, Carabrone and Tomentosin, have been isolated from the acetone extract of Inula viscosa (L.) Aiton. The structures of all new compounds were determined by spectroscopic methods, in particular 1D and 2D (1)H- and (13)C-NMR. The (13)C-NMR spectra of Isocostic acid and of Tomentosin are reported here for the first time.
MALTE INNOVATIVE PER LA COPERTURA DELLE CRESTE MURARIE IN AMBITO ARCHEOLOGICO
2014
The main objective of this study is to evaluate the opportunities offered by nanotechnologies to the production of innovative mortars with enhanced performances for the reconfiguration of walls ridges in the archaeological field. In particular, an already existing additive, based on silica nano-particles in aqueous solution, was tested mixing it in varying percentages to a hydraulic lime mortar and pozzolana. The following tests were carried out on different samples: resistance to bending and compression, adhesion to the surface, water absorption coefficient through capillarity, accelerated ageing test using salt mist. In the final stage, some comparative considerations among the different …
L'acciaio nel restauro del Convento di S. Agostino a Corleone (PA)
2007
The paper describes the techniques adopted for the static and seismic retrofitting of the S. Agostino Convent in Corleone (PA), which is classified as II category seismic zone in the Italian Code. In this work many maintenances have been conducted with the use of inox steel and carbon steel. The main works consist in new decks, built with steel - concrete system, a new stair, two elevators and interventions in the masonry active ties with the use of stainless steel ribbons. This last method is named C.A.M.. A lot of details of the verification criteria and of the constructive solutions are showed.
Design and Realization of a Bidirectional Full Bridge Converter with Improved Modulation Strategies
2020
In this paper a Full-Bridge Converter (FBC) for bidirectional power transfer is presented. The proposed FBC is an isolated DC-DC bidirectional converter, connected to a double voltage source&mdash
L'italiano digitale nella letteratura elettronica
2014
The workers' value of the remaining employment contract duration
2005
We introduce and apply a method for estimating workers' marginal willingness to pay for job attributes employing data on job search activity. Worker's willingness to pay for the remaining duration of the employment contract is derived. We provide evidence that workers attach substantial value to the remaining contract duration. A temporary worker with a remaining contract of six months is willing to pay about 10% of the monthly wage to increase the contract by one month.This discussion paper has resulted in a publication in Economica, 2008, 75(297), 116-39.
Hidden attractors in Chua circuit: mathematical theory meets physical experiments
2022
AbstractAfter the discovery in early 1960s by E. Lorenz and Y. Ueda of the first example of a chaotic attractor in numerical simulation of a real physical process, a new scientific direction of analysis of chaotic behavior in dynamical systems arose. Despite the key role of this first discovery, later on a number of works have appeared supposing that chaotic attractors of the considered dynamical models are rather artificial, computer-induced objects, i.e., they are generated not due to the physical nature of the process, but only by errors arising from the application of approximate numerical methods and finite-precision computations. Further justification for the possibility of a real exi…
D3 Dihedral Logistic Map of Fractional Order
2021
In this paper, the D3 dihedral logistic map of fractional order is introduced. The map presents a dihedral symmetry D3. It is numerically shown that the construction and interpretation of the bifurcation diagram versus the fractional order requires special attention. The system stability is determined and the problem of hidden attractors is analyzed. Furthermore, analytical and numerical results show that the chaotic attractor of integer order, with D3 symmetries, looses its symmetry in the fractional-order variant.
The Lorenz system : hidden boundary of practical stability and the Lyapunov dimension
2020
On the example of the famous Lorenz system, the difficulties and opportunities of reliable numerical analysis of chaotic dynamical systems are discussed in this article. For the Lorenz system, the boundaries of global stability are estimated and the difficulties of numerically studying the birth of self-excited and hidden attractors, caused by the loss of global stability, are discussed. The problem of reliable numerical computation of the finite-time Lyapunov dimension along the trajectories over large time intervals is discussed. Estimating the Lyapunov dimension of attractors via the Pyragas time-delayed feedback control technique and the Leonov method is demonstrated. Taking into accoun…