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Offentlige arrangementer

Bemærk at IT-Forums arrangementer ikke er offentlige men kun for medlemmer. Aarhus Universitet er medlem af IT-Forum, hvilket betyder at medarbejdere samt de studerende der har specielle interesser i specifikke arrangementer, pg.a. opgaveskrivning inden for emnet, derfor kan komme gratis ind. Andre skal betale for det.


17.04.2009 How to identify problems and provide safety in practice: Ethnography of diagnostic work in safe, collaborative practices in neonatal Care.
 

This presentation aims to show how diagnostic work is an integral part of safe, collaborative medical practices. The argument’s starting-point is the notion that collaborative accomplishments in health care practices are in fact extraordinary achievements and that diagnostic work plays a crucial role in this. The focus will be on the specific role of diagnostic work in establishing and sustaining collaborative action. I will explore the dynamic web of individuals and other actors, including devices and machines, with which they interact, on basis of an analysis of a commonly applied NICU procedure: intubation of an endo-tracheal tube, with the aim to gain insight into the role of diagnostic work in the coordination of ephemeral teamwork during complex situations in health care.

In medical settings ‘diagnosis’ generally refers to the identification of a disease. Diagnostic work as such involves a process of identifying the source of a particular illness and its potential hazards. Additionally, diagnosis is also geared to the hazards of medical intervention. The identification of problems is crucial for the prevention of incidents. Therefore doctors and nurses take care of errors and mistakes before problems can turn into unsafe situations. Further, by broadening the analytical scope, I would like to call attention to diagnostic work that has its focus outside the domain of problems and errors.This form of diagnosis is about the recognition of the overall task structure, the ability ‘to read’ the conduct of co-participants and the identification of opportunities for actions.  Although practices are impregnated with this ‘positive mode’ of diagnostic work, it is often invisible and has therefore been undertheorized in medical and nursing literature. By illuminating this kind of work in relation to teamwork, opportunities for strengthening critical care practices are opened up.

Jessica Mesman is visiting professor at Information and Media Studies in April to June 2009. She teaches Science and Technology Studies at Maastricht University. Her research interest include the anthropology of knowledge and empirical ethics in critical care medicine, particularly on issues on uncertainties and resources of resilience in patient safety. 


She is Director of Studies of the European Master Program on Society, Science and Technology (ESST) at the University of Maastricht. Currently she is also International Coordinator of the ESST Inter-University Association which offers this Master program. She is a member of the Netherlands Graduate School of Science, Technology and Modern Culture (WTMC).

Tid/sted kl. 14.15 - 16.00. Lille auditorium
Info http://www.imv.au.dk

17.04.2009 MADALGO Seminar, Mohammad Ali Abam, Aarhus University
  Title: Kinetic spanner
Speaker: Mohammad Ali Abam, Aarhus University

Abstract:

We present a new $(1+\\eps)$-spanner for sets of $n$ points in $\\Reals^d$.
Our spanner has size $O(n/\\eps^{d-1})$ and maximum degree $O(\\log^d n)$.

The main advantage of our spanner is that it can be maintained efficiently as the points move: Assuming the trajectories of the points can be described by
bounded-degree polynomials, the number of topological changes to the spanner is $O(n^2/\\eps^{d-1})$, and using a supporting data structure of size $O(n\\log^{d}n)$ we can handle events in time $O(\\log^{d+1} n)$. Moreover, the spanner can be updated in time $O(\\log n)$ if the flight plan of a point changes.

This is the first kinetic spanner for points in $\\Reals^d$ whose performance does not depend on the spread of the point set.

Host: Gerth Stølting Brodal
Tid/sted kl. 14.15. Turing-014
Info http://www.cs.au.dk/

21.04.2009 Computational Mathematics Seminar. Peyman Afshani: Maximum Cliques in Unit-disk Graphs and its Relation to Shape Covering and Graph Embedding
  There is coffee and cake at this seminar.

Abstract: Given a set P of n points in d-dimensional space, a unit-disk graph is a graph built with P as the vertex set, by connecting two vertices (i.e., points) if and only if their Euclidean distance is at most one. We are interested in problems related to the maximum cliques in a unit-disk graph.

These graphs have numerous applications (for instance, they can be used to model wireless networks) and are well studied in computational geometry literature and other fields.

In this talk, after a brief introduction, we will survey a few previous results on this problem. First, we will review how the algorithmic problem of computing the maximum clique corresponds to the following non-algorithmic covering problem: for R^d, find the minimum value of k and a set S of k objects of diameter one, such that *any* shape of diameter one can be covered using k elements of S.

For d=2 the answer is two; for d=3 the best result so far is five and no non-trivial result is known for higher dimensions.

We will also examine a related problem of embedding graphs as unit-disk graphs including some embedding results.

References

* Finding k points with minimum diameter and related problems Alok Aggarwal and Hiroshi Imai and Naoki Katoh and Subhash Suri, Journal of Algorithms, volume 12, pages: 38 - 56, 1991
* Approximation algorithms for maximum cliques in 3D unit-disk graphs, Peyman Afshani and Timothy Chan, CCCG, pages 6--9, 2005
* Approximation and inapproximability results for maximum clique of disc graphs in high dimensions, Peyman Afshani and Hamed Hatami, Information Processing Letters, volume 105, pages 83--87, January 2008
* On finding a large number of 3D points with a small diameter, Minghui Jiang, Discrete Applied Mathematics, 155:2355-2361, 2007

See http://www.cs.au.dk/~bjarke/compmath/ for more information.
Tid/sted kl. 15.15. Turing-014
Info http://www.cs.au.dk/

22.04.2009 Forcing the eye to see
 

"The first generation of filmmakers  looked at life and made films. The second generation,  looked at life, looked at the films of the first generation  and made films. The third genera­tion  just watched the films of previous generations and made films. The fourth generation neither watches films or life and makes movies.  Mainly based on the technical possibilities."

Abbas Kiarostami

 

It's about time we got back to observing life as the essence of cinema. Films based on everyday life. Many serious critics, the advocates of cinema, will find this subject dull. They don’t realize that showing reality could get people thinking about their own actions and behavior, while seeing and accepting reality as it is. In this way, the viewer can complete the film by starting to reflect about himself or herself and on the world. The combination of filmmaker’s and viewer’s minds will then produce a film that will be more durable, original, beautiful than any film which aims to tell a story and to impress the viewer. By using examples taken from cinéma vérité and realism in fiction, we will see how. 


Tid/sted kl. 14.15. Store auditorium
Info http://www.imv.au.dk

23.04.2009 Krydsfelt Århus
 

Tag på karrieremesse i Studenterhuset på havnen i Århus torsdag d. 23. april fra 10-16.

Krydsfelt Århus er en karrieremesse for dig som studerende på en videregående uddannelse.

Dagen er en oplagt mulighed for blandt andet:

- At få et job, studiejob, specialesamarbejde eller pratikplads hos en virksomhed.
- At få indsigt i den tid, der venter dig efter din tid som studerende. 
- At få hjælp til at afklare dine kompetencer samt at målrette et CV.

Virksomhederne der er repræsenteret på messen, er udvalgt gennem kriterier om synlighed i forhold til miljømæssig og social ansvarlig ageren. Det er virksomheder som disse, vi tror på kan tilbyde dig en karriere med fremtid og ikke blot en fremtid med karriere.

På messen vil det være muligt gratis at deltage i workshops med coaching og karrierevejledning. Se programmet for dagen og tilmeld dig de enkelte workshops.

Vi glæder os meget til at kunne byde dig velkommen i Studenterhuset og præsentere dig for de mange tilbud på dagen.

Se billeder fra Krydsfelt Århus '08

Tid/sted kl. 10.00 - 16.00. Studenterhuset på havnen
Tilmeldning http://krydsfeltaarhus.dk/programkrydsfelt09/

23.04.2009 MADALGO Seminar, Eric Price, MIT
  Title: Lower Bounds in Compressed Sensing

Speaker: Eric Price, Massachusetts Institute of Technology (MIT)

Abstract:

Compressed sensing is a method for reconstructing a sparse signal from a low-rank linear sketch. This is useful because many real-world signals have sparse representations in some basis; for example, images are sparse in the wavelet basis and music is sparse in the Fourier basis.

In the past five years, a variety of sketch matrices and reconstruction techniques have emerged that can efficiently and stably recover an N-dimensional vector with K non-zero components from O(K log N/K) linear measurements.

We prove that any stable recovery scheme requires O(K log N/K) linear measurements, matching the upper bound. This contrasts with the T(K) measurements required for unstable recovery.

Joint work with:

Piotr Indyk, MIT
Khanh Do Ba, MIT

Host: Gerth Stølting Brodal
Tid/sted kl. 10.15. Ada-018
Info http://www.imv.au.dk

24.04.2009 Pornoscapes. How the porn creativity spreads the web 2.0 out
 

Seminar by Gaia Novati (Italy/Germany). Moderated by Tatiana Bazzichelli.

User generated content (UGC) or perhaps more correct Consumer generated content (CGC) will be the starting point for analyzing and reflecting on how interaction with and within the Internet is developing nowadays.

In the Web 2.0 the end consumer is at ease, thanks to a structure that involves, or even more envelops, him/her. The consumer owns all the useful instruments to make him/her a creator, and can reach the ability to build up his/her own subculture by him/herself. The technological advance widely and quickly achieved in all 2.0 communities makes the online sex an enviable forerunner of. The web-cam was already used when the first steps in Facebook were made.

The market and consumption of porn becomes an avant-garde when connected with the development of technologies and new media: it is a privileged prospective from which to analyze the World Wide Web and social interrelationships. Moreover the enlargement of the web community shows a potential rise of sexscapes and desires:  any singular reflection on identity finds in the web an own dis-location.

Which Pornoscapes does the Net show nowadays? Are there any real alternatives to the porn industry’s billions of exploited and crude images crashing endlessly our mind?  Looking at the structure of the Internet today, can we still find free zones or criticaltools? Are the concepts of sharing and open source, with their roots in pre 2.0 development and thought, still part of a common cultural heritage, and consequently, part of an alternative pornography?

Modules

1) Introduction. Short explanation of gender theories, from the cyberfeminist theories to Queer-studies: Beatrize Preciado and the post-porn prospective.
2) Analysis of the current use and abuse of media in the construction of mass-porn.
3) An alternative prospective: examples showing how different networks or communities develop different sexscapes: porn artivism and porn activism.

Tid/sted kl. 14.16 - 16.00. Lille auditorium
Info http://www.imv.au.dk

24.04.2009 MADALGO Seminar, Jelani Nelson, MIT
  Title: Revisiting Norm Estimation in Data Streams

Speaker: Jelani Nelson, Massachusetts Institute of Technology (MIT)

Abstract:

The problem of estimating the pth moment Fp (p nonnegative and real) in data streams is as follows. There is a vector x which starts at 0, and many updates of the form x_i ? x_i + v come sequentially in a stream. The algorithm also receives an error parameter 0 < e < 1. The goal is then to output an approximation with relative error at most e to Fp = ||x||_p^p.

Previously, it was known that polylogarithmic space (in the vector length n) was achievable if and only if p <= 2. We make several new contributions in this regime, including:

(*) An optimal space algorithm for 0 < p < 2, which, unlike previous algorithms which had optimal dependence on 1/e but sub-optimal dependence on n, does not rely on Nisan's PRG.
(*) A near-optimal space algorithm for p = 0 with optimal update and query time.
(*) A near-optimal space algorithm for the "distinct elements" problem (p = 0 and all updates have v = 1) with optimal update and query time.
(*) Improved L_2 ? L_2 dimensionality reduction in a stream.
(*) New 1-pass lower bounds to show optimality and near-optimality of our algorithms, as well as of some previous algorithms (the "AMS sketch" for p = 2, and the L_1-difference algorithm of Feigenbaum et al.).

As corollaries of our work, we also obtain a few separations in the complexity of moment estimation problems: F_0 in 1 pass vs. 2 passes, p = 0 vs. p > 0, and F_0 with strictly positive updates vs. arbitrary updates.


Joint work with:

Daniel Kane, Harvard University
David Woodruff, IBM Almaden.

Host: Gerth Stølting Brodal
Tid/sted kl. 14.15. Turing-014
Info http://www.cs.au.dk/

27.04.2009 Gossip and sensation in the 20th century North American press
 

Guest lecture by Professor Will Straw, The Department of Communication and Art History, McGill University, Montreal, Canada.


About the lecture:
Straw will in this lecture talk about the 20th century development of a sensational press devoted to celebrities and human interest stories.
The talk will examine several revolutions in the sensational press:

  • the urban newspaper revolution initiated with the New York Sun
  • the “jazz journalism” of the 1920s
  • the wave of supermarket tabloids launched in the late 1950s
  • the enormous success of People magazine in the 1970s

Drawing on examples from the United States, Canada and Mexico, this illustrated talk will show how different varieties of the sensational newspaper have used gossip, crime, corruption and human behavior in their production of sensation.

Tid/sted kl. 13.00. Lille auditorium
Info http://www.imv.au.dk

28.04.2009 The Five Obstructions and Other Tripwires in the Creative Process
  Center for Digital Urban Livning has in collaboration with CAVI invited author and film director Jørgen Leth to talk about the creative processes in film production based on THE FIVE OBSTRUCTIONS, co-directed with Lars von Trier, Zentropa Film.

The talk will be in Danish.
Tid/sted kl. 14.14. Store auditorium
Info http://www.imv.au.dk

29.04.2009 Medialisering og nye medier
 

- Hovedtendenser i medieudviklingen efter år 2000

Medialiseringsbegrebet bruges ofte til at karakterisere mediernes selv­stæn­dig­­gørelse og brugen af medier i stadig flere sammenhænge. Jeg vil i fore­læs­ningen tage udgangspunkt i centrale teorier om medialisering (fx Win­fried Schultz, Friedrich Krotz, Stig Hjarvard, Nick Couldry) og diskutere de nye mediers betydning for forholdet mellem medier, virksomheder og borgere. Hvad betyder fx den sænkede adgangstærskel til det offentlige rum? Den trinløse integration af medier i hverdagslivet? Hvordan er det med relationen gamle / nye medier, hvilken rolle spiller de gamle medier som aktører og drivkræfter på nettet?  Hvad betyder de sociale netværk-steder og nye forret­nings­modeller for udnyttelse af brugerskabt indhold? Jeg vil i fore­læsningen argumentere for at de nye medier indebærer en udvidet medialisering, der på flere punkter går ud over det etablerede mediali­serings­­begreb.

Tid/sted kl. 14.15. Store auditorium
Info http://www.imv.au.dk

   
   
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Kontakt redaktionen: :InterntNyt@katrinebjerg.net      04/16/2009