Using a first-principles method, we study field emission properties of double-wall carbon nanotubes with various end geometries and combinations of inner and outer walls. The open double-wall nanotubes exhibit substantial contribution to the emission current from the extended π states. These states are insensitive to the detailed tip structure or the presence of foreign adsorbed molecules and t...

Higher Order Ambisonics have been increasingly investigated in the past years, and found promising as a rational, scalable and flexible way to encode, transmit and render 3D sound fields. Nevertheless, studies concerning virtual source imaging or natural 3D sound encoding mainly focussed on the directional encoding of plane waves, and neglected the near field effect of finite distance sources t...

In the development and commercialization phase of information technology products implemented as a system on a chip (SoC), field-programmable gate array (FPGA) based platform has been widely used as the logic function test methodology for basic or advanced features and mobile station emulator. In this situation, to define the uniform verification approach on FPGA development platform, we introd...

1 A tool has been created for use in a design course to automate integration of new components into a SystemOn-Chip (SoC). Students used this tool to implement a complete SoC Internet firewall, which was prototyped and tested using a field-programmable gate array (FPGA). Common components of the framework were completed as machine problem assignments throughout the first half of the semester. D...

Spintronic devices currently rely on magnetic switching or controlled motion of domain walls by an external magnetic field or spin-polarized current. Achieving the same degree of magnetic controllability using an electric field has potential advantages including enhanced functionality and low power consumption. Here we report on an approach to electrically control local magnetic properties, inc...

In this paper, we have examined strings with monopole and electric field and domain walls with matter and electric field in the spherically symmetric spacetime admitting a one-parameter group of conformal motions. For this purpose, we have solved Einstein’s field equations for a spherically symmetric space-time via conformal motions. Also, we have discussed the features of the obtained solutions.