One more step toward the noncommutative brane inflation

Recently a new approach to inflation proposal has been constructed via the smeared coherent state picture of spacetime noncommutativity. Here we generalize this viewpoint to a Randall-Sundrum II braneworld scenario. This model realizes an inflationary, bouncing solution without recourse to any axillary scalar or vector fields. There is no initial singularity and the model has the potential to produce scale invariant spectrum of scalar perturbations.Comment: 10 pages, 4 figures, Accepted by PL

A Power-Efficient Bio-Potential Acquisition Device with DS-MDE Sensors for Long-Term Healthcare Monitoring Applications

This work describes a power-efficient bio-potential acquisition device for long-term healthcare applications that is implemented using novel microelectromechanical dry electrodes (MDE) and a low power bio-potential processing chip. Using micromachining technology, an attempt is also made to enhance the sensing reliability and stability by fabricating a diamond-shaped MDE (DS-MDE) that has a satisfactory self-stability capability and superior electric conductivity when attached onto skin without any extra skin tissue injury technology. To acquire differential bio-potentials such as ECG signals, the proposed processing chip fabricated in a standard CMOS process has a high common mode rejection ratio (C.M.R.R.) differential amplifier and a 12-bit analog-to-digital converter (ADC). Use of the proposed system and integrate simple peripheral commercial devices can obtain the ECG signal efficiently without additional skin tissue injury and ensure continuous monitoring more than 70 hours with a 400 mAh battery

Circuit arrangement for enhancing the transconductance of a differential amplifier stage comprising MOS transistors

A circuit arrangement for enhancing the transconductance of a differential amplifier stage comprising a pair of MOS transistors, having respective source electrodes connected together through a circuit node, comprises a pair of active components respectively connected in each of the connections between the aforesaid electrodes and the aforesaid node and serving a characteristic function corresponding to that of a negative value resistor. This arrangement enables the transconductance of the differential stage to be increased while keeping the dissipated electric power low and the area occupied in an integrated circuit small

Renta financiera : Programa 156

Fil: Nicollini Llosa, José Luis. Universidad de Buenos Aires; ArgentinaEn esta emisión, contamos con la participación de José Luis Nicollini Llosa, Doctor en Economía (Cambridge), Profesor de la UBA e Investigador UBA-CONICET, para reflexionar sobre la renta financiera

Circuit arrangement for increasing the gain-bandwidth product of a CMOS amplifier

A circuit arrangement for increasing the gain-bandwidth product of a CMOS amplifier having a differential cell input stage comprises, within said input stage: a pair of active components having a characteristic function which corresponds with that of a negative value resistor, for increasing the transconductance of the stage, a pair of capacitors being each respectively associated with a corresponding one of the active components to introduce a pole/zero pair in the frequency response from the amplifier, and an additional input stage cross-connected to the differential cell for bringing the frequency value of the zero a predetermined distance away from the amplifier clipping frequency