Regular subgroups with large intersection

In this paper we study the relationships between the elementary abelian regular subgroups and the Sylow $2$-subgroups of their normalisers in the symmetric group $\mathrm{Sym}(\mathbb{F}_2^n)$, in view of the interest that they have recently raised for their applications in symmetric cryptography

Approximation from the exterior of a multifunction and its applications in the “sweeping process”

AbstractWe approximate from the exterior an upper semicontinuous multifunction C(·) from a metric space into the closed convex subsets of a normed space by means of globally Lipschitzean multifunctions; in particular, when C(·) is continuous, this approximation allows us to reduce the problem of the existence of solutions of the associated evolution equation to the case in which C(·) is Lipschitzean

Negotiating territories of knowledge: on interpreting talk in guided tours

The problem of interpreting what is “behind the turns”, not explicitly said by participants in their utterances, has presented a dilemma in studies of dialogue interpreting, leading to controversies about how far interpreters should engage in dealing with implicit issues they know about, but which are not made clear by the interlocutors. In this paper, I analyse data where a guide and an interpreter present a group of tourists with locations where the history and tradition of local products are exhibited. In my data interpreters expand the guides’ presentation in their rendition, adding quite a lot of information they know about, but which has not been explicitly mentioned by the guide. I suggest that the notion of epistemics, developed in conversation analysis, may help explain the dynamics regulating the distribution of responsibilities of guides and interpreters in dealing with relevant contents and I conclude that rights and obligations to explicate what is behind the guides’ talk can largely be seen as a product of the interaction

Experimental Demonstration of a Frequency-Domain Volterra Series Nonlinear Equalizer in Polarization-Multiplexed Transmission

Experimental demonstration of a dual-polarization Volterra series nonlinear equalizer applied in frequency-domain is carried out for 100G polarization-multiplexed QPSK test signals. We were able to reduce the BER by a factor of ~2.5x relatively to the single-polarization approach, with a 1 dB increase in the optimum powe

A Poetic System In Expansion Against the Abyss: Fernando Pessoa’s Heteronyms and Kierkegaard’s Concept of Anxiety

Depois de uma breve introdução acerca da recepção das ideias de Kierkegaard em Portugal, focalizo nas relações entre o sistema de heterónimos de Pessoa e as reflexões sobre a ansiedade de Kierkegaard. Em que sentido a obra de Pessoa pode ser lida no seu complexo como uma resposta à ansiedade? Quais são as estratégias dos diferentes heterónimos para se confrontar com a ansiedade? Qual é o papel da religião e de hipótese da existência de Deus na relação entre heterónimos e o sentimento da ansiedade

Do authentic data mean authentic learning? On the use of authentic samples and (in)authentic activities in teaching and learning dialogue interpreting

For some time now, research on Dialogue Interpreting (DI) has relied on data collected in real life situations, recorded and transcribed in order to analyse their discoursal and interactional features. A number of studies (e.g. Wadensjo 1998; Davidson 2000, 2002; Mason 1999, 2006) have highlighted that interpreting in interactions does not necessarily occur turn by turn, may include sequences involving the interpreter and only one of the interlocutors, may take forms different from the turns it refers to, by e.g. expanding or reducing their content. These findings have recently been taken up in DI teaching and training, in which authentic data - recorded and transcribed - are being increasingly used with learners or trainees to highlight relevant interactional features or for the students to engage in similar situations. The debate on the use of authentic data in teaching and learning is however not new and raises a series of problems which need to be considered when engaging in DI teaching. In what follows, I summarize the debate on the relationship between authentic data and authentic learning (section 2), and then illustrate some issues deriving from analysis of authentic DI interaction which may be relevant in DI learning and training (section 3). Through the observation of a roleplay activity, I then show that translating these insights into learning tasks is not easy and needs ad hoc research (section 4). Section 5 offers some concluding thoughts

Viable solutions of differential inclusions with memory in Banach spaces

In this paper we study functional differential inclusions with memory and state constraints. We assume the state space to be a separable Banach space and prove existence results for an upper semicontinuous orientor field; we consider both the case of a globally measurable orientor field and the case of a Caratheodory one