Modern processor systems are equipped with onchip or on-board power controllers. In this paper, we examine the challenges and pitfalls in architecting such dynamic power management control systems. A key question that we pose is: How to ensure that such managed systems are "energysecure" and how to pursue pre-silicon modeling to ensure such security? In other words, we address the robustness and security issues of such systems. We discuss new advances in energy-secure power management, starting with an assessment of potential vulnerabilities in systems that do not address such issues up front.
Due to the sensitive nature of the data gathered by many wireless sensor networks it is becoming critical that this data be protected. The obvious way to secure this data is to encrypt it using a secure encryption algorithm before it is transmitted over the (open) air ways. However due to the constrained nature of the resources available on sensor nodes the cost, in terms of power consumption, speed and communications overhead, of any software based encryption procedure can often out weigh the risks of the transmission being intercepted. In this paper we present a solution to reduce this cost of employing encryption by taking advantage of a resource already available on many sensor nodes; this resource being the AES hardware encryption module available on the Chipcon CC2420 transceiver chip.
All the Nations are convinced the Research and Development (RD)in general and in the Biomedical Engineering (BME) area in particular, will save the present growing problems of the planet and accordingly, try to convince the tax payers to invest money and human resources for a better future quality of life.Of course this assumption is valid but, learnt from the last 3 century history of BME, must be documented. The first naïve approach is to be convinced a magic unknown new technology will solve tomorrow the present global health and medical problems. The second approach highlights the economical impact including employment in the relevant industry. Many others approaches focuses on the progress of knowledge and sciences, on the global competition and others completive advantages.But two main lessons are learnt from the past:• The first lesson is: the impact of technologies are peanuts without an ad hoc implementation systems, or, in others words, the long term impacts of new technologies are not related to the direct today performance of the techniques, but to the long term ability of the technique to induce the reengineering of the overall system. At the end of the XIX century, the drugs redesigned completely the treatment procedures, during the XX century the medical imaging solutions redesigned the diagnostic procedures and now the information and communication technologies are fostering a complete revision of the traditional of the various healthcare delivery systems. The reengineering of the system is the final goal of the techniques and the technical solutions are not a treatment for curing the present diseases of healthcare system. But towards which system? A technical or economical driven systems? No • The second lesson is: The present "patient and disease centered Healthcare delivery systems" are the common paradigms for reasoning and are based on the assumption "sciences will save me". Due to different reasons (economy, acceptance, accessibility, sustainability etc) this paradigm is outdated and a new one, more "citizen and Health centered paradigm" must be urgently designed. This new paradigm suppose a continuous personal long life commitment and is now largely facilitated by the progress of the personal predictive medicine and communication technologies. In addition this paradigm is not limited to the rich countries (25% of population) but equally valid for low income countries and 100% of the population of the world. These lessons induce substantial operational consequences: the power and the efficiency of RD are not just limited to the performance of the new products, so good they are, but to the capability to induce changes in the overall system towards an acceptable one. On the reverse, with the technologies of the moment, substantial productivity gains and better results can be expected from RD focused not on techniques but on the systems themselves.As a whole, the medical system is extremely conservative and in average,17 years, ( half generation…), are needed for a full approval of qualified te...
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