Kommende arrangementer:

Præsentation af årets speciale 2017

indsendt 2. okt. 2018 04.01 af Hans-Henrik Kaaber   [ opdateret 2. okt. 2018 08.44 ]

Tid: 23. oktober 2018 kl.17:00 til ca. 19:30.
Sted: Aud. D på Niels Bohr Institutet, Blegdamsvej 17, 2100 København Ø
Vejledende tilmelding på

 Velkommen til sæsonens første medlemsmøde hvor vi præsenterer årets bedste specialer fra 2017.

 Nr. 1:
Anders P.K. Dalskov: “End-to-End Encrypted Cloud Storage: A security analysis of SpiderOak ONE”

We examine in the following thesis the proprietary cloud storage application SpiderOak ONE developed and maintained by the Cloud Storage Provider SpiderOak. In a nutshell, the Cloud Storage Provider claims that, due to the user’s data being encrypted before it leaves the user’s computer, only the user (or someone knowing the user’s password) can access the data. In particular, the Cloud Storage Provider cannot read any of the user’s files. We set out to examine this claim. As the application in question does not provide any kind of source code, and little in way of documentation, we first describe how we reverse engineered the application. We then provide a formal description of the authentication protocols used by the application, how it handles cryptographic keys, file encryption and password changes. Finally, we demonstrate several concrete attacks, which a malicious storage provider can carry out that weakens — or entirely breaks — the confidentiality of the user’s password and thus the confidentiality of the user’s stored data.

We disclosed our findings in a responsible manner and SpiderOak updated their product.


Nr. 2:
Kristian Jagd and Mathias Thulstrup Johansen: ”Speech Recognition Systems with Kaldi: Speech-enabling Applications with an Improved Method for Generating Recognizers”

The aim of this thesis is to simplify the process of building and using speech recognizers with the Kaldi toolkit. This is done by creating a tool, which makes it easier and faster for developers to use the open source, speech recognition toolkit Kaldi.

The thesis presents general background information about speech recognition and the speech recognition toolkit Kaldi. An analysis shows why Kaldi is difficult to use for developers who are new to speech recognition. Based on this information, we derive the requirements specification for our tool. We then describe and discuss how the tool is designed and implemented.

Lastly, the developed tool has undergone a user evaluation. The evaluation indicates that the tool does indeed allow the target users to setup and test a speech recognizer based on a Deep Neural Network (DNN) much faster than when using Kaldi without the tool.


Efter fremlæggelserne er der som sædvanlig lidt at drikke og mulighed for at stille yderligere spørgsmål til foredragsholderne eller til almindelig faglig/social snak.

The Art of Implementing Object-Oriented Programming Languages

indsendt 14. maj 2018 08.29 af Jacob Nørbjerg   [ opdateret 15. maj 2018 07.29 ]

Speaker: Lars Bak, Director, Google Development Center, Aarhus
Time: 24. May at 1630
Place: Room Ks43, Kilen, Kilen (CBS), Kilevej 14A.
Metro: Fasanvej


How is it possible to spend an entire professional career focusing only on

object-oriented languages and their implementations? The first part of this talk will discuss why performance, size, and simplicity have always played an important role and how research and innovation continue to push the envelope. Second, I’ll offer you a glimpse of a brand new programming language and software platform for small IoT devices. Please note, this is the first public introduction of Toit! Be prepared to be excited.


Lars Bak spent the last 30 years designing and implementing object-oriented programming languages. His passion for this area started in 1986 when implementing a runtime system for BETA. Since then, Lars has left marks on several software systems: Self, Strongtalk, JVM HotSpot, JVM CLDC HI, OOVM Smalltalk, V8, and Dart, and lately Toit. In 2018, he received the Dahl-Nygaard prize for design and implementation of several object-oriented systems. Lars has a master’s degree in computer science at Aarhus University from 1988.

After the talk, Lars Bak will officially receive the Dahl-Nygaard Award, see

Please sign up at the following Doodle:
Just enter your name and click on the date.

ESS Instrument Detector Algorithms

indsendt 14. maj 2018 04.43 af Hans-Henrik Kaaber   [ opdateret 14. maj 2018 04.44 ]

Professor Stig Skelboe, Niels Bohr Institute, University of Copenhagen
Time: 12 June 2018, 16:30 - 17:30
Place: Copenhagen Business School, Howitzvej 60, Department of Digitalization, room 5.23
(Afholdes i forlængelse af den årlige generalforsamling - se indkaldelsen til denne.)

The European Spallation Source (ESS) is a powerful neutron source being built in Lund in Sweden. This presentation first gives a brief overview of the ESS, and then presents the detector technology used by one of the instruments, the Macromolecular Spectrometer (NMX). The main part of the presentation is about the algorithms developed for real time processing of electrical data from the detector into the scatter images being the main outcome of an experiment. Because of the real time requirement, the algorithms are designed to run in constant time per data point. The processing includes time sorting, neutron event clustering of data from x and y electrode strips of the detector, pairing of x and y clusters, and finally localization of the neutron events.

21. marts 2018: The History of UNIX in the History of Software

indsendt 8. mar. 2018 01.25 af Jacob Nørbjerg   [ opdateret 8. mar. 2018 04.21 ]

Lektor Tom Haigh fra University of Wisconsin i Milwaukee gæster Danmark i foråret 2018 inviteret af Institut for Naturfagenes Didaktik. Besøget er foranlediget af ”Danish Network for History and Philosophy of Computer Science.

Árrangementet holdes sammen med Institut for Naturfagenes Didaktik, som har besøg af Tom Haigh – og med ITU som co-host.


Yderligere information:

11. December: Celebration of the 50th Anniversary of the SIMULA 67 Programming Language

indsendt 8. mar. 2018 01.19 af Jacob Nørbjerg

SIMULA 67, the first Object-Oriented Programming Language, was invented in Oslo in 1967. 50 years ago!
SIMULA 67 introduced Object-Oriented Programming (OOP) as we know it today, including the important concepts of objects, classes, inheritance, and much more. As such, the birth of SIMULA 67 was also the birth of OOP.

Dansk Selskab for Datalogi, Ingeniørforeningen, IDA, and  Dansk Datahistorisk Forening invites you to celebrate the event with a series of talks and a poster exhibition about the language and its influence in the past as well as today.

Time: Monday 11th December 1630
Place: Lille UP1, Universitetsparken 1, 2100 København Ø

The following speakers are confirmed so far:
Professor Boris Magnusson, University of Lund, an early implementor of Simula.
Associate professor Mads Rosendahl, Roskilde University. SIMULA was taught at Roskilde University for about 20 years.
Ole Lehrmann Madsen, professor, Aarhus University, CEO, The Alexandra Institute, co-inventor of the Beta Language. which followed up on Simula 67.

Professor Eric Jul, University of Oslo, co-inventor of the Emerald OOP Language; taught Simula 67 at DIKU in the 1970'ies.

Dansk Selskab for Datalogi, Ingeniørforeningen, IDA, and  Dansk Datahistorisk Forening host a reception after the talks.

Participation is free but we ask you to please register with your membership organization to support our planning. Members of Dansk Selskab for Datalogi can register at this doodle:

The Robots are Here, More to Come: What's Next Manager?

indsendt 21. feb. 2018 06.23 af Jacob Nørbjerg   [ opdateret 2. mar. 2018 03.01 ]

Kim Normann Andersen, professor, Department of Digitalization, CBS
Time: 7. March 2018, 16:30 - 18:00
Place: Copenhagen Business School,
Department of Digitalization, room 5.23
Howitzvej 60

Use the main entrance (north side of the building). Go to the 5th floor and knock on the door.

Abstract. While robot use is increasingly driven by expectations of a radical shift in automation and possible new service tasks, empirical knowledge about the interplay with physical work processes and how key stakeholders describe and react towards robots is sparse.. This talk presents preliminary findings from a study on how managers, workers, and citizen make sense of robots, and how robots are appropriated to fit the purpose and context of end-users. Also, findings from experiments on how workers respond to robot managers are presented.

Kim Normann Andersen is Professor at Department of Digitalization, CBS. He is study program director for the business IT-programs at CBS and was founder of the ebusiness program at ITU (ITH).

Please register to the talk by March 5 on this doodle:

22. marts 2018 Dobbeltforedrag: Komplekse computere og komplekse øl

indsendt 11. feb. 2018 11.58 af Jacob Nørbjerg   [ opdateret 22. mar. 2018 02.10 ]

Foredragsholder: Professor Brian Vinter, Head of HPC/UCPH

Tid: 22. marts 2018 kl 16.
Sted: Niels Bohr Instituttet, Blegdamsvej 19, 2100  København Ø
Adgang: døren vil være låst, følg instruktionen på døren.

TILMELDING (OBLIGATORISK) senest 19. marts kl 12:00:

DSfD indbyder til et dobbeltforedrag på Niels Bohr Institutet.

Brian Vinter vil først fortælle om brugen af supercomputere og derefter et foredrag om øl med tilhørende ølsmagning.

Tilmelding til foredraget er nødvendig, da antallet af pladser er begrænset og da ølindkøbet skal afstemmes med antallet af tilmeldte.

Foredragene bliver på engelsk.

Programmering af stadigt større og mere komplekse supercomputere


Beregningsdrevet forskning oplever et voldsomt løft ved at supercomputere bliver stadigt større og man kan derfor simulere med stadigt større opløsning eller over længere tid. Samtidigt med at computerne bliver større bliver de stadigt vanskeligere at programmere og det ventes at den første computer der leverer en exaflops vil anvende mere end 100M processor-kerner. Alene udfordringen i at skrive programmer der kører parallelt på millioner af processorer er voldsom, hvis man dertil ligger udfordringer med at optimere hukommelsestilgang og I/O flow bliver opgaven så uoverskuelig at de fleste forskere vil opgive at skrive egne programmer til disse maskiner.

Foredraget vil introducere udfordringerne i og fremtiden for supercomputere, og vil derefter gå videre til at introducere projektet Bohrium ( ) som er en just-in-time compiler der udvikles i eScience gruppen på Niels Bohr Instituttet, hvis formål er at gøre det muligt for forskere at skrive deres programmer i et høj-produktivitets sprog, typisk Python, og så kunne afvikle dem på supercomputere.



Indtagelse af stadigt stærkere og mere komplekse øl


Tiden hvor en øl aldrig kunne være andet end en pilsner er for længst passeret og alle supermarkeder har i dag et rimeligt udvalg af de mest populære alternativer til pilsneren. I denne ølsmagning vil vi prøve at kommer lidt længere ud i alternative øl. Der vil være en forklaring på øltyper og brygmetoder og anekdoter fra øllets verden.

28. september: Præsentation af de nominerede specialer til specialeprisen 2016

indsendt 8. sep. 2017 13.11 af Jacob Nørbjerg   [ opdateret 13. sep. 2017 01.40 ]

Tid: 28. september 1630-1800

Sted: Copenhagen Business School, Kilevej 14, lokale Ks71.

(OBS: Nyt lokale)

Forfatterne til de nominerede specialer præsenterer deres arbejde:

Silas Nyboe Ørting: Automatic estimation of emphysema extent in low-dose CT scans of the lungs. Datalogisk Insititut KU (Vinder af prisen for bedste datalogispeciale, 2016).

Mikkel Kragh Mathiesen: Infinite-Dimensional Linear Algebra for Efficient Query Processing. Datalogisk Institut, KU.

Thomas Jensen: Global Selections with Fine-Grained Access Control. Datalogisk Institut, KU.

Arni Einarsson: Guidelines for designing immersive videos to support learning activities: Case study of new eyes on the world.
Datalogisk Institut, KU.

Beskrivelser af specialerne kan ses i forårets medlemsblad.

1. juni 2017: Generalforsamling

indsendt 9. maj 2017 23.33 af Hans-Henrik Kaaber

Hermed indkaldes til ordinær generalforsamling Torsdag den 1. juni 2017 kl. 16.00 – ca. 16.30

Generalforsamlingen afholdes på DIKU, Universitetsparken 1, 2100 København Ø, i Auditorium 5 (HCØ, kælderen i bygning E).

Dagsorden i følge vedtægterne (se under Meddelelser).

Umiddelbart efter generalforsamlingen starter aftenens foredrag, hvorefter der er prisuddeling og reception.
Foredraget er i år en dobbeltforelæsning ved Erik Meiling (LinkedIn) og Torben Ægidius Mogensen (DIKU) og handler om programmeringssproget LISP, dets historie og betydning for programmeringssprogenes udvikling.

Faglig dag 2017: An Introduction to Data Science

indsendt 2. apr. 2017 06.55 af Hans-Henrik Kaaber   [ opdateret 20. apr. 2017 02.30 ]

Time: 26 April, 15-17
Place: Auditorium 5, HCØ,  2100 København Ø

At the annual Faglig Dag event we plan to focus on the discipline of Data Science. Three selected speakers will provide an introduction to the subject followed by example applications from their respective domains.
Please note: The presentations will be given in English.

The preliminary program looks as follows:
  • A Short Introduction to Data Science, by assistant professor Fabian Gieseke, DIKU
    The field of data science has gained considerable attention over the past years. One reason for this phenomenon is the fact that the data volumes in various domains have increased dramatically. This is the case, for instance, in astronomy, where current projects produce data volumes in the terabyte range. Upcoming ones will produce such data volumes per day, week, or even per hour. A similar "data flood" can be observed in many other disciplines including medicine, biology, finance, business intelligence, energy systems, or social media. In most cases, the sheer data volumes render a manual analysis impossible. Data science techniques aims at extracting knowledge in an automatic manner and have been identified as one of the key drivers for future discoveries and innovation. The presentation will give a quick introduction to this field and will cover various topics including big data, data science problems, data science workflow, and large-scale data analysis.

  • Business Applications of Data analytics, by assistant professor Raghava Rao Mukkamala, CBS
    This talk is about stop talking about Big Data and start doing Business Data Analytics to create business value. First, we discuss three paradigms for generating competitive advantages and business value from new technologies. Second, we present the Centre for Business Data Analytics' framework for transforming big data sets into business assets by creating meaningful facts, actionable insights, valuable outcomes, and sustainable impacts. Third and last, we present illustrative business cases.

  • Medical Applications of Data Analytics, by professor Mads Nielsen,DIKU
    I will give a short introduction to data science and machine learning and a couple of research examples. How may a data science approach help prognosis of diseases in breast cancer, Alzheimers, arthritis. These will include a brief introduction to deep learning and its application to medical sciences. Then I will focus on some of the bottlenecks of getting this to work in practice in the healthcare sector and potential technical solutions.
Moreover, we hope to present some suggested further readings as well as examples of offered or planned courses on the subject.
For practical reasons, if you expect to participate, please register at Doodle no later than 19 April.

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