Some stylized facts of the Bitcoin market

In recent years a new type of tradable assets appeared, generically known as cryptocurrencies. Among them, the most widespread is Bitcoin. Given its novelty, this paper investigates some statistical properties of the Bitcoin market. This study compares Bitcoin and standard currencies dynamics and focuses on the analysis of returns at different time scales. We test the presence of long memory in return time series from 2011 to 2017, using transaction data from one Bitcoin platform. We compute the Hurst exponent by means of the Detrended Fluctuation Analysis method, using a sliding window in order to measure long range dependence. We detect that Hurst exponents changes significantly during the first years of existence of Bitcoin, tending to stabilize in recent times. Additionally, multiscale analysis shows a similar behavior of the Hurst exponent, implying a self-similar process.Fil: Fernández, Aurelio. Universitat Rovira I Virgili; España. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Basgall, María José. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Hasperué, Waldo. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Naiouf, Ricardo Marcelo. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; Argentin

Summer Universities for Women in Computer Science

A cross-university approach will be discussed that reflects moneducation, networking, and gender oriented organizational reforms in university programs. The concept was developed in Germany in 1997 as a national approach. Each year “Informatica Feminale” (www. Informatica-feminale.de) attracts more than 70 female lectures from universities, research, or industry to give courses on all topics of computer science oriented to the existing university curricula. Participants are female students as well as women interested in further education. The approach has won an European award for best practice. Since 2003 Austria provides a similar project called the “ditact-women’s IT summer studies” (www.ditact.ac.at). Another project will be located in New Zealand in 2005 as the “Computing Women Conference” (www/ cwc.org.nz)

Desarrollo de tecnologías educativas orientadas a la inclusión social de usuarios de sistemas de Comunicación Aumentativa asistidos

En el presente artículo se describe y analiza el proceso de creación de una tecnología para la dinamización de desarrollos de software y prácticas educativas innovadoras, hacia la participación igualitaria de personas con Necesidades Complejas de Comunicación en el contexto social. Se ponen en tensión conceptos teóricos clave anclados al diseño de tecnologías para la discapacidad; se expone la metodología abordada en el proyecto de investigación que dio marco al trabajo; y el trayecto hacia la elaboración de directrices teórico-metodológicas para la creación de sistemas colaborativos de Comunicación Aumentativa, y de un software modelo denominado “ECCA”. Finalmente, se analizan las debilidades de la experiencia en función de contribuir a una transformación social efectiva.Fil: Guisen, Maria Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; ArgentinaFil: Sanz, Cecilia Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; Argentin

Ars Informatica -- Ars Electronica: Improving Sonification Aesthetics

In this paper we discuss æsthetic issues of sonifications. We posit that many sonifications have suffered from poor acoustic ecology which makes listening more difficult, thereby resulting in poorer data extraction and inference on the part of the listener. Lessons are drawn from the electro acoustic music community as we argue that it is not instructive to distinguish between sonifications and music/sound art. Edgar Var`ese defined music as organised sound and sonifications organise sound to reflect some aspect of the thing being sonified. Therefore, we propose that sonification designers can improve the communicative ability of their auditory displays by paying attention to the æsthetic issues that are well known to composers, orchestrators, sound designers & artists, and recording engineers

Theoretische Informatica

Deze notitie beschrijft in het kort wat theoretische informatica is en hoe dit door de groep Theoretische Invormatica van de Universiteit Twente wordt bedreven in onderwijs en onderzoek