Search results for " symbols"
showing 10 items of 37 documents
Spectropolarimetric evidence for a siphon flow along an emerging magnetic flux tube
2016
©2017 The American Astronomical Society. All rights reserved.We study the dynamics and topology of an emerging magnetic flux concentration using high spatial resolution spectropolarimetric data acquired with the Imaging Magnetograph eXperiment on board the sunrise balloon-borne solar observatory. We obtain the full vector magnetic field and the line of sight (LOS) velocity through inversions of the Fe i line at 525.02 nm with the SPINOR code. The derived vector magnetic field is used to trace magnetic field lines. Two magnetic flux concentrations with different polarities and LOS velocities are found to be connected by a group of arch-shaped magnetic field lines. The positive polarity footp…
On some difficulties of putting in dialogue animal rights with anthropological debates: a historical view in three episodes
2018
In this paper, I try to identify the reasons why the dialogue between sociocultural anthropology and animal rights theories and movements continues to be difficult and scarce. At first sight this weakness of communication is surprising, if one looks at the amount of anthropological studies on human/animal relationships, in most cases pointing to how animals are considered in many cultures as non- human subjects or persons. For understanding the roots of this state of affairs, I compare the ways anthropologists and animal rights theorists and activists have engaged with the issue of the differences and commonalities between human beings and nonhuman animals. For this aim, I contrast the sear…
'Opera e declamazione teatrale in Italia nel Diciottesimo secolo. Convergenze e problemi'
2014
The fulfilment of the operatic reform, managed by Christoph Willibald Gluck and his librettist Ranieri Calzabigi in 1760s’ Vienna, is a well-known topic. This event, whose seeds date back to the 1740s, has been examined according to theatrical and literary experiences in France and Italy. However, the question of acting influence on opera can be reconsidered at the light of the latest discovery of symbols collected and labelled as drammatica – metodo italiano. Engraved in some writings, this set of signs is often connected to music and offers the matter for a new critical survey about the discourse on music declamation before and after Calzabigi. From the 1830s onwards the theory of acting …
A Characterization of Bispecial Sturmian Words
2012
A finite Sturmian word w over the alphabet {a,b} is left special (resp. right special) if aw and bw (resp. wa and wb) are both Sturmian words. A bispecial Sturmian word is a Sturmian word that is both left and right special. We show as a main result that bispecial Sturmian words are exactly the maximal internal factors of Christoffel words, that are words coding the digital approximations of segments in the Euclidean plane. This result is an extension of the known relation between central words and primitive Christoffel words. Our characterization allows us to give an enumerative formula for bispecial Sturmian words. We also investigate the minimal forbidden words for the set of Sturmian wo…
A longitudinal examination of the transition to symbolic communication in the second year of life
2003
Between 10 and 24 months of age, children progress from communicating through conventional signals to communicating through symbols in a variety of situations. The present study investigates this transition analysing mother–child communication frames and the child’s communicative acts, and tracing the developmental changes in both frames and communicative acts. Four children (2 girls, 2 boys) and their mothers were observed longitudinally and extensively, from 10 to 24 months of age, using a multiple case-study method. Through the detailed investigation of these single cases, clear developmental trajectories were found, showing that conventional frames and representational gestures ‘bridge’…
Dyskryminacja ze względu na bezwyznaniowość w pracy. Rozważania na kanwie orzeczeń sądowych zapadłych w sprawie dotyczącej G.J
2021
Kazus G. J. dotyczy dyskryminacji nauczycielki, która dwukrotnie zdjęła ze ściany pokoju nauczycielskiego krzyż. Swoje zachowanie tłumaczyła negatywnymi skojarzeniami z tym symbolem religijnym. Została ukarana dyscyplinarnie przez dyrekcję szkoły, co uznała za dyskryminację jej osoby ze względu na jej bezwyznaniowość. Złożyła do sądu pozew o odszkodowanie z tytułu molestowania w miejscu pracy i uzyskała korzystne dla siebie rozstrzygniecie. Po prawomocnym zakończeniu sprawy wniesiona została skarga nadzwyczajna do Sądu Najwyższego z wnioskiem o uchylenie wyroku całości i orzeczenie przez Sąd Najwyższy co do istoty sprawy. W powyższej sprawie przedmiotem rozstrzygnięcia nie była kwestia eksp…
G. Herglotz’ Behandlung von Beschleunigungswellen in seiner Vorlesung «Mechanik der Kontinua» angewandt auf die Stosswellen von Christoffel
1981
Following a lecture delivered by Herglotz in 1925/26 we briefly treat acceleration waves in hyperelastic materials. Our main result is a divergence equation for the squared Euclidean norm of the so-called ‘wave vector’. We then apply Herglotz’ method (devised for acceleration waves) to the propagation of such first order discontinuities in elastic bodies as were treated by Christoffel in [1].
On the Structure of Bispecial Sturmian Words
2013
A balanced word is one in which any two factors of the same length contain the same number of each letter of the alphabet up to one. Finite binary balanced words are called Sturmian words. A Sturmian word is bispecial if it can be extended to the left and to the right with both letters remaining a Sturmian word. There is a deep relation between bispecial Sturmian words and Christoffel words, that are the digital approximations of Euclidean segments in the plane. In 1997, J. Berstel and A. de Luca proved that \emph{palindromic} bispecial Sturmian words are precisely the maximal internal factors of \emph{primitive} Christoffel words. We extend this result by showing that bispecial Sturmian wo…
Figure della maternità e itinerari dell’attesa negli oggetti del Museo etnografico siciliano Giuseppe Pitrè
2023
Il contributo propone una riflessione sul tema della maternità che lega, come un filo rosso, gli oggetti del Museo etnografico siciliano Giuseppe Pitrè e ne struttura la narrazione. Lo sguardo rivolto alle collezioni e al loro ordinamento restituisce la centralità di una tematica che riflette il senso profondo della cultura che gli oggetti comunicano e svela, attraverso i suoi simboli, i significati contestuali delle sue figure: le madri e i loro corpi, le madrine e i loro ruoli, le levatrici e le loro potenzialità. The contribution proposes a reflection on the theme of motherhood that links the objects of the Sicilian Ethnographic Museum Giuseppe Pitrè as a core idea and a narrative struct…
A simple joint estimation-detection technique for OFDM systems
2005
In this work a simple approach for the joint estimation-detection in a frequency selective severe fading environment of OFDM signals adopting PSK constellations is presented. A linear predictor of suitable order is adopted for the channel estimation in the frequency domain. The predictor coefficients are estimated on the basis of a sample estimation of the autocorrelation of the channel frequency response, aided by a preliminary differential decoding, in a blockwise manner. The detection technique proposed here is based on a simple tree search where a small number of best survivor paths are maintained at each step. Despite the simplicity of above detection approach, the simulation results s…