A low-power, surface-normal optically controlled optical gate that incorporates two stacked AlGaAs diodes has been tested using both picosecond and femtosecond pulses. The device opens and closes within 20 picoseconds with a 30% reflectivity change. Repeated gating with 20 picosecond periods has been demonstrated— a repetition period significantly faster than the external RC time constant. A th...

VEGA* reflects an Internet-based cooperation platform that provides holistic support for virtual enterprises. Using an integrated, layered framework and taking a top-down approach, an overview is given of the various, interdependent system levels. The core element is a three-layer service architecture. In addition to a ubiquitous marketspace, which serves as a portal gate for virtual collaborat...

A module has been implemented in Field Programmable Gate Array (FPGA) hardware that is able to perform regular expression search-and-replace operations on the content of Internet packets at Gigabit/second rates. All of the packet processing operations are performed using reconfigurable hardware within a single Xilinx Virtex XCV2000E FPGA. A set of layered protocol wrappers is used to parse the ...

the present work with consideratlon to the autoradiographic pictures, suggests that cholinergic receptors are located at the gate of a channel originating from synaptic cleft coming to lie within the muscle fibre. ache molecules stand at the gate of this channel,controlling the entrance of different cholinergic agents. it was report- ••• ed previously that dtc molecules s t.abd ;:.2e the ache r...

Top-gated graphene transistors operating at high frequencies (gigahertz) have been fabricated and their characteristics analyzed. The measured intrinsic current gain shows an ideal 1/f frequency dependence, indicating a FET-like behavior for graphene transistors. The cutoff frequency f(T) is found to be proportional to the dc transconductance g(m) of the device, consistent with the relation f(T...

Security and trust represent two different perspectives on the problem of guaranteeing the correct interaction among software components. Gate automata have been proposed as a formalism for the specification of both security and trust policies in the scope of the Security-by-Contract-withTrust (S×C×T) framework. Indeed, they watch the execution of a target program, possibly modifying its behavi...

Abstract Two-dimensional layered gallium monochalcogenide (Ga X , where = S, Se, Te) semiconductors possess great potential for use in optoelectronic and photonic applications, owing to their direct band edge. In this work, the structural optical properties of full-series multilayer GaTe 1− x Se 0 1 are examined. The experimental results show that whole series layers may contain one hexagonal (...

A metal-oxide-semiconductor field-effect transistor (MOSFET) structure with a non-overlapped source-drain to T-gate is proposed to overcome the challenges in fabricating sub-30 nm complementary MOS (CMOS) devices. A high-κ spacer was adopted to induce effectively inversion layer in the non-overlapped region by using a fringing gate electric field, resulting in the suppression of the short-chann...

In the field of genetic research and the subsequent rise of biobanks an intensive discussion is taking place on national and international levels about property and personality rights to one’s own body and body parts. The authors attempt to develop on the basis of the current controversially discussed law a concept of property, which can solve the legal and bioethical problems of the multiple u...