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Christoffer Brax - IEEE Xplore Author Profile
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Christoffer Brax

Publications
9
Citations
38
Publications by Year
20082024
Co-Authors:
Show All Co-Authors (35)
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Christoffer Brax

Affiliation

Combitech AB, Linköping, Sweden

Publication Topics

Biography

Christoffer Brax is a consultant at Combitech, Linköping, 583 30, Linköping, Sweden, working in systems engineering, requirements management, systems design and architecture, and IT security. Brax received his Ph.D. from Örebro University. Contact him at christoffer.brax@combitech.com.(Based on document published on 11 February 2021).
Publications
9
Citations
38
Publications by Year
20082024
Co-Authors:
Show All Co-Authors (35)
Author's Published Works

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On the Industrial Leadership and Involvement in the LwM2M IoT Ecosystem

Gregorio Robles;Jonas Gamalielsson;Björn Lundell;Christoffer Brax;Tomas Persson;Anders Mattsson;Tomas Gustavsson;Jonas Feist;Jonas Öberg

2024 IEEE/ACM 6th International Workshop on Software Engineering Research & Practices for the IoT (SERP4IoT)
Year: 2024 | Conference Paper |
The importance of standards, and especially ICT standards, in the IoT domain is widely recognised. Implementations of standard specifications provided as Open Source Software (OSS) promote interoperability and longevity of systems and create conditions for avoiding lock-in, and industrial involvement is important since it can affect community dynamics and will to contribute. The overarching goal o...Show More

On the Industrial Leadership and Involvement in the LwM2M IoT Ecosystem

Gregorio Robles;Jonas Gamalielsson;Björn Lundell;Christoffer Brax;Tomas Persson;Anders Mattsson;Tomas Gustavsson;Jonas Feist;Jonas Öberg

Year: 2024 | Conference Paper |

On Company Contributions to Community Open Source Software Projects

Simon Butler;Jonas Gamalielsson;Björn Lundell;Christoffer Brax;Johan Sjöberg;Anders Mattsson;Tomas Gustavsson;Jonas Feist;Erik Lönroth

IEEE Transactions on Software Engineering
Year: 2021 | Volume: 47, Issue: 7 | Journal Article |
Cited by: Papers (13)
The majority of contributions to community open source software (OSS) projects are made by practitioners acting on behalf of companies and other organisations. Previous research has addressed the motivations of both individuals and companies to engage with OSS projects. However, limited research has been undertaken that examines and explains the practical mechanisms or work practices used by compa...Show More

On Company Contributions to Community Open Source Software Projects

Simon Butler;Jonas Gamalielsson;Björn Lundell;Christoffer Brax;Johan Sjöberg;Anders Mattsson;Tomas Gustavsson;Jonas Feist;Erik Lönroth

Year: 2021 | Volume: 47, Issue: 7 | Journal Article |

A Language and Repository for Cyber Security of Smart Grids

Yuning Jiang;Manfred Jeusfeld;Yacine Atif;Jianguo Ding;Christoffer Brax;Eva Nero

2018 IEEE 22nd International Enterprise Distributed Object Computing Conference (EDOC)
Year: 2018 | Conference Paper |
Cited by: Papers (4)
Power grids form the central critical infrastructure in all developed economies. Disruptions of power supply can cause major effects on the economy and the livelihood of citizens. At the same time, power grids are being targeted by sophisticated cyber attacks. To counter these threats, we propose a domain-specific language and a repository to represent power grids and related IT components that co...Show More

A Language and Repository for Cyber Security of Smart Grids

Yuning Jiang;Manfred Jeusfeld;Yacine Atif;Jianguo Ding;Christoffer Brax;Eva Nero

Year: 2018 | Conference Paper |

Evaluating precise and imprecise State-Based Anomaly detectors for maritime surveillance

Christoffer Brax;Alexander Karlsson;Sten F. Andler;Ronnie Johansson;Lars Niklasson

2010 13th International Conference on Information Fusion
Year: 2010 | Conference Paper |
Cited by: Papers (6)
We extend the State-Based Anomaly Detection approach by introducing precise and imprecise anomaly detectors using the Bayesian and credal combination operators, where evidences over time are combined into a joint evidence. We use imprecision in order to represent the sensitivity of the classification regarding an object being normal or anomalous. We evaluate the detectors on a real-world maritime ...Show More

Evaluating precise and imprecise State-Based Anomaly detectors for maritime surveillance

Christoffer Brax;Alexander Karlsson;Sten F. Andler;Ronnie Johansson;Lars Niklasson

Year: 2010 | Conference Paper |

An ensemble approach for increased anomaly detection performance in video surveillance data

Christoffer Brax;Lars Niklasson;Rikard Laxhammar

2009 12th International Conference on Information Fusion
Year: 2009 | Conference Paper |
Cited by: Papers (1) | Patents (2)
The increased societal need for surveillance and the decrease in cost of sensors have led to a number of new challenges. The problem is not to collect data but to use it effectively for decision support. Manual interpretation of huge amounts of data in real-time is not feasible; the operator of a surveillance system needs support to analyze and understand all incoming data. In this paper an approa...Show More

An ensemble approach for increased anomaly detection performance in video surveillance data

Christoffer Brax;Lars Niklasson;Rikard Laxhammar

Year: 2009 | Conference Paper |

Signature-based activity detection based on Bayesian networks acquired from expert knowledge

Farzad Fooladvandi;Christoffer Brax;Per Gustavsson;Mikael Fredin

2009 12th International Conference on Information Fusion
Year: 2009 | Conference Paper |
Cited by: Papers (1)
The maritime industry is experiencing one of its longest and fastest periods of growth. Hence, the global maritime surveillance capacity is in a great need of growth as well. The detection of vessel activity is an important objective of the civil security domain. Detecting vessel activity may become problematic if audit data is uncertain. This paper aims to investigate if Bayesian networks acquire...Show More

Signature-based activity detection based on Bayesian networks acquired from expert knowledge

Farzad Fooladvandi;Christoffer Brax;Per Gustavsson;Mikael Fredin

Year: 2009 | Conference Paper |

Extending the scope of situation analysis

Lars Niklasson;Maria Riveiro;Fredrik Johansson;Anders Dahlbom;Goran Falkman;Tom Ziemke;Christoffer Brax;Thomas Kronhamn;Martin Smedberg;Hakan Warston;Per M. Gustavsson

2008 11th International Conference on Information Fusion
Year: 2008 | Conference Paper |
Cited by: Papers (5)
The use of technology to assist human decision making has been around for quite some time now. In the literature, models of both technological and human aspects of this support can be identified. However, we argue that there is a need for a unified model which synthesizes and extends existing models. In this paper, we give two perspectives on situation analysis: a technological perspective and a h...Show More

Extending the scope of situation analysis

Lars Niklasson;Maria Riveiro;Fredrik Johansson;Anders Dahlbom;Goran Falkman;Tom Ziemke;Christoffer Brax;Thomas Kronhamn;Martin Smedberg;Hakan Warston;Per M. Gustavsson

Year: 2008 | Conference Paper |

Finding behavioural anomalies in public areas using video surveillance data

Christoffer Brax;Lars Niklasson;Martin Smedberg

2008 11th International Conference on Information Fusion
Year: 2008 | Conference Paper |
Cited by: Papers (5) | Patents (1)
In this paper we propose an approach for detecting anomalies in data from visual surveillance sensors. The approach includes creating a structure for representing data, building ldquonormal modelsrdquo by filling the structure with data for the situation at hand, and finally detecting deviations in the data. The approach allows detections based on the incorporation of a priori knowledge about the ...Show More

Finding behavioural anomalies in public areas using video surveillance data

Christoffer Brax;Lars Niklasson;Martin Smedberg

Year: 2008 | Conference Paper |

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