Stockholm University

Displaying 1-9 of 9 results

  • White Papers // Jun 2011

    A Holistic and Immune System Inspired Security Framework

    This paper presents a Framework for adaptive information security systems for securing information systems. Information systems today are vulnerable and not adaptive to the dynamic environments because initial development of these systems focused on computer technology and communications protocol only. Most research in information security does not consider culture of...

    Provided By Stockholm University

  • White Papers // Jun 2011

    Secure e-Learning Using the Holistic and Immune Security Framework

    This paper describes how to secure e-learning systems by applying the Holistic and Immune Security Framework. E-learning has great potential for developing communities but security of E-learning systems has not been fully addressed. The authors have developed a security framework that considers culture of users and environments where information systems...

    Provided By Stockholm University

  • White Papers // Jun 2011

    Exponential Growth Bias And Financial Literacy

    The tendency to underestimate the future value of a variable growing at a constant rate, an example of exponential growth bias, has been linked to household financial decision making. The authors show that exponential growth bias and standard measures of financial literacy are negatively correlated in a representative sample of...

    Provided By Stockholm University

  • White Papers // Aug 2010

    On Toeplitz and Kronecker Structured Covariance Matrix Estimation

    A number of signal processing applications require the estimation of covariance matrices. Sometimes, the particular scenario or system imparts a certain theoretical structure on the matrices that are to be estimated. Using this knowledge allows the design of algorithms exploiting such structure, resulting in more robust and accurate estimators, especially...

    Provided By Stockholm University

  • White Papers // Apr 2010

    Business Models in the Mobile Ecosystem

    The mobile ecosystem is constantly changing. The roles of each actor are uncertain and the question how each actor cooperates with each other is of interest of researchers both in academia and industry. In this paper, the authors examine the mobile ecosystem from a business perspective. They used five mobile...

    Provided By Stockholm University

  • White Papers // Feb 2010

    OFDM PAPR Reduction by Convex Optimization a Power Amplifier Point-of-View

    In this paper, the authors evaluate the application of convex optimization for PAPR reduction on OFDM 802.11a signal type. A radio frequency power amplifier is measured and characterized while excited by both original and optimized OFDM signals. A state-of-art test setup was used for the purpose. Figure of merits such...

    Provided By Stockholm University

  • White Papers // May 2009

    Wideband Power Amplifier Charaterization by Undersampling: Zu-Frank Sampling Theorem

    Future wireless communication systems are moving towards broad-band signals. Their frequencies will vary from couple of KHz to hundreds of Mhz. The Power Amplifier (PA) is a key radio component in any wireless communication system, and behavioral modeling of its input-output characteristics a developed research area. Considering the PA as...

    Provided By Stockholm University

  • White Papers // Mar 2009

    Wideband Characterization of Power Amplifiers Using Undersampling

    In this paper a radio frequency power amplifier is measured and characterized by the use of undersampling based on the generalized Zhu-Frank sampling theorem. A test system has been designed allowing the bandwidth of the stimuli signal to be 100 MHz in the characterization process. That would not be possible...

    Provided By Stockholm University

  • White Papers // Mar 2009

    Market Sharing And Price Leadership

    This paper proposes an alternative to the traditional model of supply and demand in markets where consumers take prices as given. Within the framework of "No side payments and partial preplay communication" firms are assumed to decide non-cooperatively on production and marketing while the market price is set by a...

    Provided By Stockholm University

  • White Papers // Jun 2011

    A Holistic and Immune System Inspired Security Framework

    This paper presents a Framework for adaptive information security systems for securing information systems. Information systems today are vulnerable and not adaptive to the dynamic environments because initial development of these systems focused on computer technology and communications protocol only. Most research in information security does not consider culture of...

    Provided By Stockholm University

  • White Papers // Mar 2009

    Market Sharing And Price Leadership

    This paper proposes an alternative to the traditional model of supply and demand in markets where consumers take prices as given. Within the framework of "No side payments and partial preplay communication" firms are assumed to decide non-cooperatively on production and marketing while the market price is set by a...

    Provided By Stockholm University

  • White Papers // Jun 2011

    Exponential Growth Bias And Financial Literacy

    The tendency to underestimate the future value of a variable growing at a constant rate, an example of exponential growth bias, has been linked to household financial decision making. The authors show that exponential growth bias and standard measures of financial literacy are negatively correlated in a representative sample of...

    Provided By Stockholm University

  • White Papers // Feb 2010

    OFDM PAPR Reduction by Convex Optimization a Power Amplifier Point-of-View

    In this paper, the authors evaluate the application of convex optimization for PAPR reduction on OFDM 802.11a signal type. A radio frequency power amplifier is measured and characterized while excited by both original and optimized OFDM signals. A state-of-art test setup was used for the purpose. Figure of merits such...

    Provided By Stockholm University

  • White Papers // Apr 2010

    Business Models in the Mobile Ecosystem

    The mobile ecosystem is constantly changing. The roles of each actor are uncertain and the question how each actor cooperates with each other is of interest of researchers both in academia and industry. In this paper, the authors examine the mobile ecosystem from a business perspective. They used five mobile...

    Provided By Stockholm University

  • White Papers // Aug 2010

    On Toeplitz and Kronecker Structured Covariance Matrix Estimation

    A number of signal processing applications require the estimation of covariance matrices. Sometimes, the particular scenario or system imparts a certain theoretical structure on the matrices that are to be estimated. Using this knowledge allows the design of algorithms exploiting such structure, resulting in more robust and accurate estimators, especially...

    Provided By Stockholm University

  • White Papers // Mar 2009

    Wideband Characterization of Power Amplifiers Using Undersampling

    In this paper a radio frequency power amplifier is measured and characterized by the use of undersampling based on the generalized Zhu-Frank sampling theorem. A test system has been designed allowing the bandwidth of the stimuli signal to be 100 MHz in the characterization process. That would not be possible...

    Provided By Stockholm University

  • White Papers // May 2009

    Wideband Power Amplifier Charaterization by Undersampling: Zu-Frank Sampling Theorem

    Future wireless communication systems are moving towards broad-band signals. Their frequencies will vary from couple of KHz to hundreds of Mhz. The Power Amplifier (PA) is a key radio component in any wireless communication system, and behavioral modeling of its input-output characteristics a developed research area. Considering the PA as...

    Provided By Stockholm University

  • White Papers // Jun 2011

    Secure e-Learning Using the Holistic and Immune Security Framework

    This paper describes how to secure e-learning systems by applying the Holistic and Immune Security Framework. E-learning has great potential for developing communities but security of E-learning systems has not been fully addressed. The authors have developed a security framework that considers culture of users and environments where information systems...

    Provided By Stockholm University