It is shown that a Partitioned Optical Passive Stars (POPS) network with g groups and d processors per group can route any permutation among the n = dg processors in one slot when d = 1 and 2dd=ge slots when d > 1. The number of slots used is optimal in the worst case, and is at most the double of the optimum for all permutations π such that π(i) 6= i, for all i.

Folded slots are attractive for active arrays because of their broad bandwidth and simplicity. They have been used recently in a quasi-optical amplifier array. However, little is known about these antennas on thin substrates. The finite-difference time-domain (FDTD) method is applied to the analysis of cpw-fed folded-slot antennas. This paper compares the theoretical results and measured data a...

In this paper, we present a TDMA based multiple access technique for ATM over satellite. We consider an scenario where a large number of remote stations are connected to the ATM cloud via satellite. We focus on performance evaluation for CBR, VBR and ABR traffic with markovian analysis and simulation. We calculate equivalent bandwidth for VBR traffic in order to gain statistical multiplexing, w...

We present a dialogue manager that is able to handle multiple domains simultaneously. Our dialogue manager consists of five modules, one of which, the Task Manager, deserves special attention. Each domain is represented by a frame, which is in turn composed by slots and rules. Slots define domain data relationships, and rules define the system’s behavior. The use of frames allowed the remaining...

Slotted-waveguide antenna arrays find wide applications in communication and radar systems that require narrow beam or shaped-beam radiation patterns, especially when high power, light weight, limited scanned areas are priorities. Placement of slots waveguide plays a crucial role for shaping side lobes with desired values. An iterative procedure calculating the placements slot positions slotted...

The vacuum chamber of a storage ring normally consists of periodically spaced pumping slots. The longitudinal impedance of slots are analyzed in this paper. It is found that although the broad-band impedance is tolerable, the narrow-band impedance, as a consequence of the periodicity of the slots, may exceed the stability limit given by natural damping with no feedback system on. Based on this ...

This paper presents the development of an Ultra Wide Band (UWB) monopole antenna with dual band notch characteristics. Modified crown-square shaped fractal slots in the ground-plane are implemented to enhance the impedance bandwidth to around 58% as compared to conventional square monopole antenna without slots. Impedance bandwidth of the proposed antenna is approximately 114% with Voltage stan...

The experimental study of a gold slot waveguide cavity is presented. The resonance of this cavity working in the telecom wavelength range is highly dependent on the refractive index of the medium located in or around the slots array, because of the high confinement of the electromagnetic field in the structure. We will demonstrate the application of this structure to local refractive index sens...

We present a resource-aware scheduling technique for MapReduce multi-job workloads that aims at improving resource utilization across machines while observing completion time goals. Existing MapReduce schedulers define a static number of slots to represent the capacity of a cluster, creating a fixed number of execution slots per machine. This abstraction works for homogeneous workloads, but fai...

A terahertz (THz) in-line polarization converter that yields a polarization conversion ratio as high as 99.9% is demonstrated at 1 THz. It has double-layer slot structures oriented in orthogonal directions that are electrically connected by 1/8-wavelngth-long through-via holes beside the slot structures. The slots on the front metal-plane respond to the incident THz wave with polarization ortho...