Holistic analysis of mix protocols

Security protocols are often analysed in isolation as academic challenges. However, the real world can require various combinations of them, such as a certified email protocol executed over a resilient channel, or the key registration protocol to precede the purchase protocols of Secure Electronic Transactions (SET). We develop what appears to be the first scalable approach to specifying and analysing mix protocols. It expands on the Inductive Method by exploiting the simplicity with which inductive definitions can refer to each other. This lets the human analyst study each protocol separately first, and then derive holistic properties about the mix. The approach, which is demonstrated on the sequential composition of a certification protocol with an authentication one, is not limited by the features of the protocols, which can, for example, share message components such as cryptographic keys and nonces. It bears potential for the analysis of complex protocols constructed by general composition of others

Holistic analysis of the effectiveness of a software engineering teaching approach

To provide the best training in software engineering, several approaches and strategies are carried out. Some of them are more theoretical, learned through books and manuals, while others have a practical focus and often done in collaboration with companies. In this paper, we share an approach based on a balanced mix to foster the assimilation of knowledge, the approximation with what is done in software companies and student motivation. Two questionnaires were also carried out, one involving students, who had successfully completed the subject in past academic years (some had already graduated, and others are still students), and other questionnaire involving companies, in the field of software development, which employ students from our school. The analysis of the perspectives of the different stakeholders allows an overall and holistic) view, and a general understanding, of the effectiveness of the software engineering teaching approach. We analyse the results of the questionnaires and share some of the experiences and lessons learned.info:eu-repo/semantics/publishedVersio

A holistic analysis method to assess the controllability of commercial buildings and their systems

This paper describes a novel design process for advanced MIMO (multiple inputs and multiple outputs) control system design and simulation for buildings. The paper describes the knowledge transfer from high technology disciplines such as aerospace flight control systems and the space industry to establish a three-step modelling and design process. In step 1, simplified, but holistic nonlinear and linearised dynamic models of the building and its systems is derived. This model is used to analyse the controllability of the building. In step 2, further synthesis of this model leads to the correct topology of the control system design. This is proved through the use of simulation using the simple building model. In step 3, the controller design is proved using a fully detailed building simulation such as ESP-r that acts as a type of virtual prototype of the building. The conclusions show that this design approach can help in the design of superior and more complex control systems especially for buildings designed with a Climate Adaptive Building (CAB) philosophy where many control inputs and outputs are used to control the building's temperature, concentration of CO2, humidity and lighting levels

Toward a Holistic Analysis of Music

Music integrates. That is its function. And because its integrative capacity parallels that of the human nervous system, music presents a model of human experience. Music analysis must refer to this modelling process in order to be complete

Analysis of pivot sampling in dual-pivot Quicksort: A holistic analysis of Yaroslavskiy's partitioning scheme

The final publication is available at Springer via http://dx.doi.org/10.1007/s00453-015-0041-7The new dual-pivot Quicksort by Vladimir Yaroslavskiy-used in Oracle's Java runtime library since version 7-features intriguing asymmetries. They make a basic variant of this algorithm use less comparisons than classic single-pivot Quicksort. In this paper, we extend the analysis to the case where the two pivots are chosen as fixed order statistics of a random sample. Surprisingly, dual-pivot Quicksort then needs more comparisons than a corresponding version of classic Quicksort, so it is clear that counting comparisons is not sufficient to explain the running time advantages observed for Yaroslavskiy's algorithm in practice. Consequently, we take a more holistic approach and give also the precise leading term of the average number of swaps, the number of executed Java Bytecode instructions and the number of scanned elements, a new simple cost measure that approximates I/O costs in the memory hierarchy. We determine optimal order statistics for each of the cost measures. It turns out that the asymmetries in Yaroslavskiy's algorithm render pivots with a systematic skew more efficient than the symmetric choice. Moreover, we finally have a convincing explanation for the success of Yaroslavskiy's algorithm in practice: compared with corresponding versions of classic single-pivot Quicksort, dual-pivot Quicksort needs significantly less I/Os, both with and without pivot sampling.Peer ReviewedPostprint (author's final draft

Parametric Schedulability Analysis of Fixed Priority Real-Time Distributed Systems

Parametric analysis is a powerful tool for designing modern embedded systems, because it permits to explore the space of design parameters, and to check the robustness of the system with respect to variations of some uncontrollable variable. In this paper, we address the problem of parametric schedulability analysis of distributed real-time systems scheduled by fixed priority. In particular, we propose two different approaches to parametric analysis: the first one is a novel technique based on classical schedulability analysis, whereas the second approach is based on model checking of Parametric Timed Automata (PTA). The proposed analytic method extends existing sensitivity analysis for single processors to the case of a distributed system, supporting preemptive and non-preemptive scheduling, jitters and unconstrained deadlines. Parametric Timed Automata are used to model all possible behaviours of a distributed system, and therefore it is a necessary and sufficient analysis. Both techniques have been implemented in two software tools, and they have been compared with classical holistic analysis on two meaningful test cases. The results show that the analytic method provides results similar to classical holistic analysis in a very efficient way, whereas the PTA approach is slower but covers the entire space of solutions.Comment: Submitted to ECRTS 2013 (http://ecrts.eit.uni-kl.de/ecrts13

Holistic Analysis of Scheduled Tribe College Students

Education is one of the primary agents of transformation towards development. Education is in fact, an input not only for economic development of tribes but also for inner strength of the tribal communities which helps them in meeting the new challenges of life. (KabitaKumariSahu, 2014) Mixed methodology and Follow up Explanation model design is used in the research. Purposive sampling technique has been used for collecting data through Online questionnaire and in-depth interviews. Holistic analysis focuses on analyzing socio, economic and political order of students. The major findings include the influence of peer, adaptability of students, participation roles, challenges faced, and other components. The suggestions would be based on the need in the institution by working accordingly to the instructions of the UGC Guidelines to help build an inclusive discrimination free learning environment. (UGC, 2018

Dynamic modelling of wind turbine and power system for fault ride-through analysis

This paper presents a Simulink model of a wind power system for the holistic analysis of wind turbine and power grid during grid faults, aiming to investigate wind turbine Fault Ride-Through performance. The model comprises a highly detailed dynamic model of a 2MW wind turbine and a generic electrical network model. The simulation result shows the behaviour of both wind turbine and power grid when grid faults occurs. The impact that a grid fault has on wind turbine components and grid transients is illustrated and discussed

Ethernet-based systems: contributions to the holistic analysis

A number of characteristics are boosting the eagerness of extending Ethernet to also cover factory-floor distributed real-time applications. Full-duplex links, non-blocking and priority-based switching, bandwidth availability, just to mention a few, are characteristics upon which that eagerness is building up. But, will Ethernet technologies really manage to replace traditional Fieldbus networks? To this question, Fieldbus fundamentalists often argue that the two technologies are not comparable. In fact, Ethernet technology, by itself, does not include features above the lower layers of the OSI communication model. Where are the higher layers that permit building real industrial applications? And, taking for free that they are available, what is the impact of those protocols, mechanisms and application models on the overall performance of Ethernetbased distributed factory-floor applications? In this paper we provide some contributions that may pave the way towards providing some reasonable answers to these issues

Gender Quotas for Corporate Boards: A Holistic Analysis

Gender quotas for corporate boards have risen in popularity ever since Norway implemented the first quota in 2003. Proponents point to economic arguments (i.e. enhanced return on assets and return on equity) as well as social good rationales (i.e. bolstered corporate social responsibility and reduced fraud) to validate their enactment. Advocates further gloss over a moral justification rooted in a broad notion of equality, although more heavily relying on empirical claims. This article demonstrates how empirical rationales in support of gender quotas are unconvincing. Economic evidence is ultimately inconclusive, and the social good justifications alone do not serve as compelling policy objectives. With respect to equality, the article distinguishes between equality of outcome and equality of opportunity, explaining how gender quotas provide equal outcome but do not satisfy equal opportunity. Finally, the article points to two more robust objectives for all gender workplace advancement policies, namely, equal opportunity and autonomy