3,818 research outputs found
Les quatre Henri, ou, le jugement du meunier de Lieursain : parodie sans parodie, en un acte mêlé de vaudevilles / par M. Bernard ; représentée pour la première fois, sur le théâtre du Vaudeville, le 2 août 1806.
No full textM. Bernard is a collective pseudonym for Michel Dieulafoy and Gersin--Cf. Quèrard, Supercheries, vol. 1, col. 545. Variously attributed to H. Simon as a further joint author. Without music; tunes indicated by title
Book review: Crazy like us: the globalization of the American psyche, by Ethan Watters, New York, Free Press, 2010, 320 pp., $26, ISBN 10: 141658708X
No full textPetr Simon (1944-2018)
No full textThis article is a reflection on the mathematical legacy of Professor Petr Simon.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Analysi
A Comparative Study of the TEA, XTEA, PRESENT and Simon lightweight cryptographic schemes
No full textWith the current fast paced growth in the number of devices connected to the internet, many of these having limited computational capability, security concerns are of increasing importance. To meet the necessity of providing secure encryption to constrained devices many lightweight cryptographic schemes have been developed. This paper provides a comparative study of four of these schemes, namely TEA, XTEA, PRESENT and Simon, explaining how they work and discussing their vulnerabilities and performances. This paper specifically considers the performance of Application Specific Integrated Circuit (ASIC) implementations with regards to their size, throughput, power usage and energy usage per bit encrypted. TEA and PRESENT were found to have potentially problematic vulnerabilities, while no attacks on XTEA and Simon are known that do not reduce the number of rounds used during encryption. Simon and PRESENT were found to perform well, while XTEA implementations were found to be too large for constrained devices. Out of the four, Simon seems the most promising for use in constrained devices. As such, further research into its vulnerabilities is advisable.CSE3000 Research ProjectComputer Science and Engineerin
Book review: White coat, black hat, by Carl Elliott, Boston, MA, Beacon Press, 2010, 224 pp., ISBN 978-0-8070-6142-8
No full textEpidemiology and bioethics : a plea for reconnecting with the public
No full textThe author takes the position that both epidemiology and bioethics, as practiced within academic establishments, have largely a
lthough not entirely
abstracted the public context of health and well-being from their respective disciplines. It is argued that by and large both d
isciplines have been highly
successful at what they do. However, this success can in part be attributed to each limiting its ability to look beyond its res
pective academic niche and
thus embrace challenges which are socially challenging, politically charged, and academically messy. This narrow focus has beco
me self-serving and
ultimately detracts from fundamental remits of both disciplines in protecting the public from harm. Furthermore, it may re-enfo
rce the inequalities of
research into health overall, whereby the greatest concentration of effort remains firmly focused upon those who already have t
he most. Currently
marginalized approaches to each of these disciplines – such as social epidemiology, global bioethics, and critical bioethics –
provide us with platforms
that challenge mainstream academic epidemiologists and bioethicists to seek out and reconnect their expertise with questions th
at are more relevant to
real-world situations
The long-wavelength view of GG Tau A: rocks in the ring world
No full textWe present the first detection of GG Tau A at centimetre wavelengths, made with the Arcminute Microkelvin Imager Large Array at a frequency of 16 GHz (λ = 1.8 cm). The source is detected at >6 σrms with an integrated flux density of S16GHz = 249 ± 45 µJy. We use these new centimetre-wave data, in conjunction with additional measurements compiled from the literature, to investigate the long-wavelength tail of the dust emission from this unusual protoplanetary system. We use an MCMC-based method to determine maximum likelihood parameters for a simple parametric spectral model and consider the opacity and mass of the dust contributing to the microwave emission. We derive a dust mass of Md ~ 0.1 Msun, constrain the dimensions of the emitting region and find that the opacity index at λ > 7 mm is less than unity, implying a contribution to the dust population from grains exceeding ~4 cm in size. We suggest that this indicates coagulation within the GG Tau A system has proceeded to the point where dust grains have grown to the size of small rocks with dimensions of a few centimetres. Considering the relatively young age of the GG Tau association in combination with the low derived disc mass, we suggest that this system may provide a useful test case for rapid core accretion planet formation models
Ethical considerations in the framing of the cognitive enhancement debate
No full textOver the past few years the use of stimulants such as methylphenidate and modafinil among the student population has attracted considerable debate in the pages of bioethics journals. Under the rubric of cognitive enhancement, bioethicists have discussed this use of stimulants—along with future technologies of enhancement—and have launched a sometimes forceful debate of such practices. In the following paper, it is argued that even if we focus solely upon current practices, the term cognitive enhancement encompasses a wide range of ethical considerations that can usefully be addressed without the need for speculation. In taking this position it is suggested that we divide cognitive enhancement into a series of empirically-constructed frameworks—medical risks and benefits, self-medication and under-prescription, prescription drug abuse and over-medication, and finally, the intention to cognitively enhance. These are not mutually exclusive frameworks, but provide a way in which to identify the scope of the issue at hand and particular ethical and medical questions that may be relevant to enhancement. By a process of elimination it is suggested that we can indeed talk of cognitive enhancement as an observable set of practices. However, in doing so we should be aware of how academic commentaries and discussion may be seen as both capturing reality and reifying cognitive enhancement as an entity
Science communication in Sub-Saharan AFrica: The case of GMOs
No full textThe following paper discusses the importance of establishing communication channels between academia, the media, and the public with respect to the development of biotechnology within Sub-Saharan Africa. Citing evidence from interviews with specialists in genetic science, science journalism and public education, the paper reflects on the problems associated with developing multidisciplinary discussion within academic circles, communication between natural scientists and the media, and ultimately the exchange of knowledge between science and society. The major findings from these interviews is that while there is a shared objective and realisation that science communication is important for the development of the region, this objective is hampered by a lack of understanding and trust between scientists and the scientific media. A pattern of mistrust has developed whereby local experts tend to talk to journalists from outside the region rather than from Africa. As a result, there is little opportunity for scientists and the media to communicate the relevance of genetics and biotechnology for the region's development. By way of conclusion, the paper discusses the positive indicators for science communication across the region, based on demand for knowledge, empowerment of scientists and the public, and the urgency of the regional food crisis. Copyright © 2010 John Wiley & Sons, Ltd.
Łojasiewicz–Simon gradient inequalities for coupled Yang–Mills energy functions
No full textWe prove Lojasiewicz–Simon gradient inequalities for coupled Yang–Mills energy functions using Sobolev spaces which impose minimal regularity requirements on pairs of connections and sections. The Lojasiewicz–Simon gradient inequalities for coupled Yang–Mills energy functions generalize that of the pure Yang–Mills energy function due to the first author (Feehan, 2014) for base manifolds of arbitrary dimension and due to R˚ade (1992, Proposition 7.2) for dimensions two and three
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