This study presents the importance of reversible logic in designing of high performance and low power consumption digital circuits. In our research, the various forms of sequential reversible circuits such as D, T, SR and JK flip-flops are investigated based on carbon nanotube field-effect transistors. All reversible flip-flops are simulated in two voltages, 0.3 and 0.5 Volt. Our results show t...

Many properties of an optically interconnected system can be improved through the use of a modelocked laser. The short pulse duration, high peak power, wide spectral bandwidth, and low timing jitter of such a laser lead to these benefits. Timing advantages include simplified synchronization across large chip areas, receiver latency reduction, and data resynchronization. Lower power dissipation ...

The massive and automated access to Web resources through robots has made it essential for Web service providers to make some conclusion about whether the "user" is a human or a robot. A Human Interaction Proof (HIP) like Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) offers a way to make such a distinction. CAPTCHA is a reverse Turing test used by Web serv...

We report the first room temperature optical spin-injection of a dilute nitride 1300 nm vertical-cavity surface-emitting laser (VCSEL) under continuous-wave optical pumping. We also present a novel experimental protocol for the investigation of optical spin-injection with a fiber setup. The experimental results indicate that the VCSEL polarization can be controlled by the pump polarization, and...

This paper describes a high-speed GaAs MESFET digital IC design for optical communication systems. We propose novel circuit configurations of a selector and a static delayed flip-flop which are key elements to perform high-speed digital functions. Employing these new design, the selector IC and static decision IC fabricated with 0.12-μm GaAs MESFET operated up to 44 Gbit/s and 22 Gbit/s, respec...

Well-defined single-crystalline nanobelts with strong fluorescence were fabricated from a perylene tetracarboxylic diimide molecule modified with specific side-chains that afford flip-flap stacking, rather than the common translated stacking, between the molecules along the long axis of the nanobelt. The nanobelts thus fabricated possess highly polarized, self-waveguided emission, making them i...

This paper describes the design and implementation of a static model used for position estimation of a flexible modular medical manipulator equipped with optic-fiber based sensors. Flexible manipulators are emerging technology in medical applications especially in minimally invasive surgery as it allows to perform the operation with tight space constraints without damaging other organs. Such op...

Power dissipation is a significant factor in the field of today’s electrical or electronic designing. The most promising substitute to these issues is the reversible computing. The reversible circuits do not dissipate energy as much as irreversible circuits. The reversible circuits do not lose information and can also produce unique outputs from the specific inputs and vice versa. So in the vie...

Magnetic-resonance imaging using the novel MR signal (26% Xe), which was contained in a 25 cm cylindrical glass cell (2 cm diameter, 7.5 cm length) , at 3 atm, along source provided by hyperpolarized noble gases Xe and He may prove to be an important new diagnostic technique with 3 atm N2 buffer gas and a small quantity of solid Rb. Xe was hyperpolarized in the fringe field of a 1.5 T superfor ...