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Namnlöst dokument

  • Edgar Lopez-Rojas
  • Stefan Axelsson
  • Dejan Baca

Analysis of fraud controls using the PaySim financial simulatorlänk till annan webbplats
Fraud controls for financial transactions are needed and required by law enforcement agencies to flag suspicious criminal activity. These controls, however, require deeper analysis of the effectiveness and the negative impact for the legal customers. Owing to the intrinsically private nature of financial transactions, this analysis is often performed after several months of actively using fraud controls. In this paper, we present an analysis of different fraud prevention controls on a mobile money service based on thresholds using a simulator called PaySim. PaySim uses aggregated data from a sample dataset to generate a synthetic dataset that resembles the normal operation of transactions and injects malicious behaviour. With technology frameworks such as agent-based simulation techniques, and the application of mathematical statistics, we show in this paper that the simulated data can be as prudent as the original dataset for setting optimal controls for fraud detection.

  • Gunnar Alendal
  • Geir Olav Dyrkolbotn
  • Stefan Axelsson

Forensics acquisition - Analysis and circumvention of samsung secure boot enforced common criteria modelänk till annan webbplats
The acquisition of data from mobile phones have been a mainstay of criminal digital forensics for a number of years now. However, this forensic acquisition is getting more and more difficult with the increasing security level and complexity of mobile phones (and other embedded devices). In addition, it is often difficult or impossible to get access to design specifications, documentation and source code. As a result, the forensic acquisition methods are also increasing in complexity, requiring an ever deeper understanding of the underlying technology and its security mechanisms. Forensic acquisition techniques are turning to more offensive solutions to bypass security mechanisms, through security vulnerabilities. Common Criteria mode is a security feature that increases the security level of Samsung devices, and thus make forensic acquisition more difficult for law enforcement. With no access to design documents or source code, we have reverse engineered how the Common Criteria mode is actually implemented and protected by Samsung's secure bootloader. We present how this security mode is enforced, security vulnerabilities therein, and how the discovered security vulnerabilities can be used to circumvent Common Criteria mode for further forensic acquisition.

  • Tomas Nilson

Samuel Cunardlänk till annan webbplats

  • Tomas Nilson

Hamburg-America Linelänk till annan webbplats

  • Marie-Helene Zimmerman Nilsson
  • Liselott Fritzdorf
  • Fredrik Panzio

Mission Possible 2.0 : Livesändning som fördjupning av examinationlänk till annan webbplats
Lärarlaget i Förskollärarutbildningen på Högskolan i Halmstad har sedan starten HT 2011 systematiskt arbetat med utbildningens digitala progression. Vi har hittills genomfört digitala projekt med studenterna trots att brist på utrustning och teknikstöd har gjort det komplicerat. I föreliggande projekt har vi tagit nästa steg i kvalitetsutvecklingen av den digitala progressionen med stöd av de nya möjligheter Digitalt laborativt center (DLC) erbjuder. Examinationsformer inom högre utbildning tenderar att präglas av kunskapsredovisning och akademiskt skrivande. Mot bakgrund av detta är motivet för projektet att bidra till att synliggöra hur digital ljud- och bildproduktion kan utgöra examinationsformer i lärarutbildning, vilket vi ser som strategiskt viktigt för utbildning vid såväl akademi som hela Högskolan. Motivet är också att lyfta fram hur kvalitet i lärarutbildningen kan utvecklas via studentaktivt lärande med stöd av DLC för redan befintliga utbildningsdelar. Vårt projekts ambition är sammantaget att uppmärksamma lärar- och studentroller i vår undervisning med nya digitala redskap och att beakta de kritiska aspekter som förs fram. Projektets syfte är att utveckla kursmomentet Mission Possible till 2.0, vad gäller digital visuell produktion. Detta har inneburit att del av examination har sänts live ifrån DLC, där det finns ljud och bild av god kvalitet. Studenter har skött den digitala tekniken respektive agerat experter utifrån de områden de har läst in sig på i kursen och ställt frågor till inbjudna gäster inom respektive område ifrån fältet. Lärarna har haft rollen som debattmoderatorer. Den live-sända examinationsdelen har utvärderats specifikt av studenterna, vilket också inbegriper deras perspektiv på projektet i relation till erfarenheter av deltagande. Under presentationen kommer examinationens utformning och genomförande att beskrivas närmare tillsammans med en problematisering av såväl process som produkt.

  • Kristina Thorell

Planering av det nordiska landskapet : en kunskapsöversikt om vindkraftlänk till annan webbplats

  • Jeroen Ploeg
  • Cristofer Englund
  • Henk Nijmeijer
  • Elham Semsar-Kazerooni
  • Steven E. Shladover
  • Alexey Voronov
  • Nathan van de Wouw

Guest Editorial Introduction to the Special Issue on the 2016 Grand Cooperative Driving Challengelänk till annan webbplats
Cooperative driving is based on wireless communications between vehicles and between vehicles and roadside infrastructure, aiming for increased traffic flow and traffic safety, while decreasing fuel consumption and emissions. To support and accelerate the introduction of cooperative vehicles in everyday traffic, in 2011, nine international teams joined the Grand Cooperative Driving Challenge (GCDC). The challenge was to perform platooning, in which vehicles drive in road trains with short intervehicle distances. The results were reported in a Special Issue of IEEE Transactions on Intelligent Transportation Systems, published in September 2012 [item 1 in the Appendix]. © 2000-2011 IEEE.

  • K. Willa
  • Zhu Diao
  • D. Campanini
  • U. Welp
  • R. Divan
  • M. Hudl
  • Z. Islam
  • W.-K. Kwok
  • A. Rydh

Nanocalorimeter platform for in situ specific heat measurements and x-ray diffraction at low temperaturelänk till annan webbplats
Recent advances in electronics and nanofabrication have enabled membrane-based nanocalorimetry for measurements of the specific heat of microgram-sized samples. We have integrated a nanocalorimeter platform into a 4.5 T split-pair vertical-field magnet to allow for the simultaneous measurement of the specific heat and x-ray scattering in magnetic fields and at temperatures as low as 4 K. This multi-modal approach empowers researchers to directly correlate scattering experiments with insights from thermodynamic properties including structural, electronic, orbital, and magnetic phase transitions. The use of a nanocalorimeter sample platform enables numerous technical advantages: precise measurement and control of the sample temperature, quantification of beam heating effects, fast and precise positioning of the sample in the x-ray beam, and fast acquisition of x-ray scans over a wide temperature range without the need for time-consuming re-centering and re-alignment. Furthermore, on an YBa2Cu3O7−δ crystal and a copper foil, we demonstrate a novel approach to x-ray absorption spectroscopy by monitoring the change in sample temperature as a function of incident photon energy. Finally, we illustrate the new insights that can be gained from in situ structural and thermodynamic measurements by investigating the superheated state occurring at the first-order magneto-elastic phase transition of Fe2P, a material that is of interest for magnetocaloric applications. © 2017 Author(s).

  • Walid Taha
  • Yingfu Zeng
  • Adam Duracz
  • Fei Xu
  • Kevin Atkinson
  • Paul Brauner
  • Robert Cartwright
  • Roland Philippsen

Developing a first course on cyber-physical systemslänk till annan webbplats
Effective and creative Cyber-Physical Systems (CPS) development requires expertise in disparate fields that have traditionally been taught in several distinct disciplines. At the same time, students seeking a CPS education generally come from diverse educational backgrounds. In this paper, we report on our recent experience of developing and teaching a course on CPS. The course addresses the following three questions: What are the core elements of CPS? How should these core concepts be integrated in the CPS design process? What types of modeling tools can assist in the design of Cyber-Physical Systems? Our experience with the first four offerings of the course has been positive overall. We also discuss the lessons we learned from some issues that were not handled well. All material including lecture notes and software used for the course are openly available online.

  • Evaldas Vaiciukynas
  • Adas Gelzinis
  • Antanas Verikas
  • Marija Bacauskiene

Parkinson’s Disease Detection from Speech Using Convolutional Neural Networkslänk till annan webbplats
Application of deep learning tends to outperform hand-crafted features in many domains. This study uses convolutional neural networks to explore effectiveness of various segments of a speech signal,? – text-dependent pronunciation of a short sentence, – in Parkinson’s disease detection task. Besides the common Mel-frequency spectrogram and its first and second derivatives, inclusion of various other input feature maps is also considered. Image interpolation is investigated as a solution to obtain a spectrogram of fixed length. The equal error rate (EER) for sentence segments varied from 20.3% to 29.5%. Fusion of decisions from sentence segments achieved EER of 14.1%, whereas the best result when using the full sentence exhibited EER of 16.8%. Therefore, splitting speech into segments could be recommended for Parkinson’s disease detection. © ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2018.

Updated 2010-07-23