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Companies that use a Software-as-a-Service (SaaS) application do so mainly to either replace an existing IT solution or as an extension function to other applications. However, both the data and the system may be exposed to higher threats when a SaaS application is integrated into an existing IT infrastructure. Many firms rate security as a critical issue when moving to the cloud, but only a scant few know how to secure their data. In an attempt to solve this problem, this paper included both the technical view and the management view to help enterprises enhance their security capability when using SaaS. The risks of different SaaS applications and their proposed security enhancement controls are presented from a technical point of view. Based on the management point of view, a model is proposed that will guide a firm in the development of a secure SaaS integrated system as well as fulfill the business requirements. Checklists and reference tools are provided to enable an efficient and effective execution. To prove the utility of the proposed model, we arranged for two firms to apply our model. It was found that when enterprises use the proposed model when adopting a SaaS solution, they can enhance the protection level of their data. [ABSTRACT FROM PUBLISHER]

This paper reports on the extraction of the small-signal equivalent circuit of 28nm isolated RF MOS transistors using on-wafer 4-port S-parameter measurements up to 50GHz. It shows that modeling accuracy of RF MOS is significantly enhanced via a 4-resistance cross-type substrate network plus an isolation sub-network. In addition, the impact of substrate network on Mason gain is presented. Finally, the whole methodology is shown to be very promising to extract and model RF MOS in sub-threshold region for low power/high frequency applications. [ABSTRACT FROM PUBLISHER]

The use of multicores is becoming widespread in the field of embedded systems, many of which have real-time requirements. Hence, ensuring that real-time applications meet their timing constraints is a pre-requisite before deploying them on these systems. This necessitates the consideration of the impact of the contention due to shared low-level hardware resources like the front-side bus (FSB) on the Worst-Case Execution Time (WCET) of the tasks. Towards this aim, this paper proposes a method to determine an upper bound on the number of bus requests that tasks executing on a core can generate in a given time interval. We show that our method yields tighter upper bounds in comparison with the state-of-the-art. We then apply our method to compute the extra contention delay incurred by tasks, when they are co-scheduled on different cores and access the shared main memory, using a shared bus, access to which is granted using a round-robin arbitration (RR) protocol. [ABSTRACT FROM PUBLISHER]

For the purpose of integrating active, nonlinear and surface-mount components in substrate-integrated waveguide (SIW) technology, this paper presents a variety of new and modified transitions from SIW to other planar transmission lines. Typical performances are shown involving connections to microstrip, coplanar waveguide (both conductor-backed and regular), coplanar strip line and slot line technologies. Both modified and new transition examples in the 18 – 27 GHz range demonstrate the feasibility of such interfaces for bandwidths in the order of 40 percent. Measurements and full-wave simulations validate the proposed designs. [ABSTRACT FROM PUBLISHER]

A notch band ultra-wideband bandpass filter with good out-of-band rejection, controllable and multiple transmission zeros in notch band and good inband performance is presented in this paper. A shunt short-circuited stub is used to build up the initial ultra-wideband skirt. A slot is then embedded into the short-circuited stub to achieve cross-coupled effects. This cross-coupled circuit can effectively reject the harmonic in the upper-stopband. Based on this circuit, the 1st-order, 3rd-order and 5th-order bandpass filter is discussed to study the improvement of the selectivity and harmonic suppression. In addition, a notch-band is implemented by adding an open-circuited stub, which is with via to form a shunt connected LC resonator. By implementing multiple shunt LC resonator, multiple transmission zeros can be achieved in the notch-band. Finally, a notch-band filter prototype is fabricated to experimentally verify the predicted results. [ABSTRACT FROM PUBLISHER]

A CMOS control circuit capable of closed-loop capacitance sensing and control of RF MEMS switches was designed, fabricated, and tested. The control was based on fine-tuning the magnitude of the bias voltage of the switches according to the difference between sensed and targeted capacitances. Intelligence could be programmed by periodically alternating the sign of the bias voltage when its magnitude to maintain the targeted capacitance drifted significantly due to dielectric charging. Such an intelligent control could also be used to compensate for process variation, ambient temperature change, and RF power loading, which would make RF MEMS capacitive switches not only more reliable, but also more robust. [ABSTRACT FROM PUBLISHER]