Saving energy of the portable devices including smartphones have become a critical design problem. Modern components of these devices are suffering from hunger of power. In this purpose, many researchers studied how to minimize the energy consumption. Dynamic voltage and frequency scaling (DVFS) is an effective energy saving technique for these portable devices. This paper proposes a simple but...

in this paper, the behavior of saving and consumption has been considered in ramsey – cass- koopmans model’s framework. our purpose was investigation of dynamics of these variables and analysis of their response to other parameter and variable variations. so, we made lagrangian function subject to some restrictions and euler equations and other steady state path equations. and then, we have cal...

In this paper, an IEEE 802.15.6 wireless body area networks (WBAN) medium access control protocol is developed to support a wireless USB (WUSB) application as a protocol adaptation layer (PAL). Due to portable and wearable nature, the WUSB over IEEE 802.15.6 hierarchical medium access control (MAC) protocol has to support the power saving operation and integrate WUSB transactions with WBAN traf...

In this paper, k-anonymity notion is adopted to be used in wireless sensor networks (WSN) as a security framework with two levels of privacy. A base level of privacy is provided for the data shared with semitrusted sink and a deeper level of privacy is provided against eavesdroppers. In the proposed method, some portions of data are encrypted and the rest is generalized. Generalization shortens...