Endre søk
Begrens søket
1 - 5 of 5
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Treff pr side
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
Merk
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 1.
    Cegrell, Torsten
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Björkman, Gunnar
    Protection against high impact, low frequency attacks on power system control2010Artikkel i tidsskrift (Annet vitenskapelig)
  • 2.
    Johansson, Erik
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Johnson, Pontus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Cegrell, Torsten
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Assessment of Enterprise Information Security in Electric Utilities: The Importance of Prioritization2006Inngår i: Proceedings CIGRE Session 2006, 2006Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In today’s large electric utilities enterprise system is highly complex. Technically, they possess several hundreds of extensively interconnected and heterogeneous IT systems performing tasks that vary from Enterprise Resource Planning (ERP) to real-time control and monitoring of the processes, such as Distributed Control System (DCS) and Supervisory Control and Data Acquisition System (SCADA). Organizationally, the enterprise system embraces business processes and business units using, as well as maintaining and acquiring, the IT systems. Information and systems are to a large extent becoming integrated in industry operations since communication and sharing of information are becoming more efficient and faster than before. However, the networking and interconnection of systems can increase the enterprise exposure to information security risks. The significance of information security has been continuously increasing in the management of organizations and in ensuring their operating ability as well as in maintaining disturbance-free and efficient operations. Thus, enterprise information security has become an increasingly important system quality. Assessing a sufficient level of information security is a necessary pre-requisite for the continuance and credibility of operations. But assessing the level of information security in an enterprise is a serious challenge for many organizations, since the area still lacks sufficient support for decision-making on a top-management level. One problem with such assessments is that there are various views on what, exactly, should be measured. There are different opinions on what the constituent parts of enterprise information security are and what these parts? relative importance is. Addressing that problem, this paper presents an operational definition and prioritization of the field of enterprise information security. First, the paper proposes a framework for capturing the semantic essence of enterprise information security. Then, the relative weights of the framework?s subdomains are quantified. Two methods for prioritization are used to obtain the weights. The results demonstrate to what extent different standards committees, guideline authors and expert groups differ in their opinions on what the important issues are in enterprise information security. As prioritization sources, the ISO/IEC 17799, the NIST SP 800-26, the ISF standards committees, the CMU/SEI OCTAVE framework authors and an expert panel at the Swedish Information Processing Society (DFS) are considered. To demonstrate the practical consequences, the effects of varying prioritizations on the enterprise information security assessment results in a European energy company are presented.

  • 3.
    Lindström, Åsa
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Cegrell, Torsten
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Grandell, Markus
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    The top IT concerns for Chief Information Officers in European Electric Power Industries2006Inngår i: 41st International Conference on Large High Voltage Electric Systems 2006, CIGRE 2006, 2006Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The electric power industry heavily depends on IT. Earlier, business operations of most large companies were supported by a number of isolated software systems performing diverse specific tasks, from real-time process control to administrative functions. Today many companies possess a highly complex enterprise-wide IT system; in large organizations several hundreds of interconnected systems may be employed. The industry is challenged by two major changes; the integration of administrative systems and operation support systems and the deregulation of the electricity market. The deregulation affects the deployment of IT in many ways; new IT support is needed for many business processes, e.g. billing. The ever changing business environment challenges contemporary organizations to constantly get most value from their IT. The Chief Information Officer, CIO, is responsible for IT management which is a significant challenge today. This paper uses the Architecture Theory Diagram (ATD) for modeling the CIO's responsibilities. The ATD spans the concerns of the CIO and is based on consolidated knowledge from existing architecture theories and frameworks. This paper presents the result from a survey where the concerns stated in the ATD were prioritized by CIOs at European electric power industries. The result can be used by CIOs for benchmarking. A prioritized set of concerns can be used for communicating to the rest of the organization what is important and be used as a basis for IT investments decisions and determining strategy. This paper is based on a survey answered by CIOs in the European electric power industry in January and February 2005. The survey was answered by twelve supreme IT chiefs at Electric Power Industries in Europe. All the respondents come from different countries and ten of the respondents are members in Cigré. The respondents consist of 75 % CIOs and 59 % of all the respondents' reports directly to their CEO. Results from the survey indicates that "Developing strategies", "IT and business alignment", and "Information security" are the three most important concerns for the European CIOs' in general. Then it is a large gap down to the fourth most important concern, which is "Project management". The paper is concluded with recommendation on how companies can use this survey to focus and communicating their prioritizations. The survey has been conducted in cooperation with the CIO-group at Vattenfall, Cigré and the Department of Industrial Information and Control Systems (ICS) at the Royal Institute of Technology (KTH), Sweden.

  • 4.
    Nordström, Lars
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Cegrell, Torsten
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem.
    Analyzing utility information system architectures using the common information model2005Inngår i: 2005 CIGRE/IEEE PES International Symposium, 2005, s. 274-281Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Properly applied, information technology can go a long way to meet challenges introduced by the changes in power flow introduced by the opening of electricity markets. To provide efficient support to utilities information systems must be well adapted to current and future business needs. For some years the goal of information systems support at utilities have been an integrated suite of IT systems that are well aligned to the business processes. This, to some extent utopian, goal is sometimes referred to as the Integrated Utility.

    This paper presents experiences with applying a modelling approach, using established notation and standards that can be used to analyze utility-wide information system architectures. The specific characteristic of the modelling approach presented in this paper is that the modelling is done with the IEC standardised Common Information Model as a basis. The benefits of using the approach is that it provides a straightforward method to create consistent documentation of use of data and functionality across several systems. The output created consist of unambiguous UML compliant models, and standards based functionality listings in which data and functionality duplication and overlap can be identified.

    The paper is concluded with a presentation of a case study in which the proposed approach was applied to a real world utility's business processes and systems. The case study shows promising results for the approach, but also underlines the need for farther work.

  • 5.
    Nordström, Lars
    et al.
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem. IEEE, Sweden .
    Cegrell, Torsten
    KTH, Skolan för elektro- och systemteknik (EES), Industriella informations- och styrsystem. IEEE, Sweden .
    Extended UML Modeling for Risk Management of Utility Information System Integration2005Inngår i: 2005 IEEE Power Engineering Society General Meeting, IEEE , 2005, s. 913-919Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Cost-efficient and effective power system maintenance is dependent on timely access to accurate information about the status of equipment and work orders in planning, execution or in completed status. However, Information Systems at many utilities are not properly configured to support these requirements. Implementation and integration of new and existing systems often requires large effort involving many parts of the utility and still in many cases does not lead to desired gains in efficiency and effectiveness.

    This paper proposes a modeling approach using extensions to the Unified Modeling Language (UML) that facilitate modeling of power system maintenance at utilities. The purpose of the approach is to enhance analysis of the Information Systems used in support of power system maintenance. The benefits of using UML have already been shown in the power industry by its use in creating the Common Information Model (CIM). The benefits of using the proposed approach are that it better captures the interorganizational challenges when implementing and integrating Information System for maintenance of power systems thereby reducing the risk of failure.

1 - 5 of 5
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf