A new class of electronically beam-steerable corrugated substrate integrated waveguide (CSIW) slot array antenna operating at 26–29 GHz has been developed. The conventional via-based walls waveguides (SIWs) or stub-based CSIWs have replaced with an interdigitated capacitor (IDC) structure to enable reconfigurability. This novel IDC-CSIW is shown a lower transmission loss compared in the literat...

A dual-polarized paralle-plate waveguide slot array antenna operating at 24.5 GHz band is proposed in this paper. The architecture consists of two orthogonally oriented 20×19 radiating arrays, where the slots are positioned collinearly. centered longitudinal feeding introduced into waveguides, which offer improved aperture efficiency and higher cross-polarization discrimination (XPD) compared t...

This paper studies slot allocation at congested airports in Europe. First, I discuss the inefficiencies of the current regulation, introduced as part of the liberalisation process of the air transport market. Then, I consider three marked based methods which are suitable to achieve a more efficient allocation of slots to airlines: congestion pricing, auctions and secondary trading. These method...

The Generalized Second Price auction (GSP) has been widely used by search engines to sell ad slots. Previous studies have shown that the pure Price Of Anarchy (POA) of GSP is 1.25 when there are two ad slots and 1.259 when three ad slots. For the cases with more than three ad slots, however, only some untight upper bounds of the pure POA were obtained. In this work, we improve previous results ...

The main contribution of this work is to propose energy-eecient randomized initialization protocols for ad-hoc radio networks (ARN, for short). First, we show that if the number n of stations is known beforehand, the single-channel ARN can be initialized by a protocol that terminates, with high probability, in O(n) time slots with no station being awake for more than O(log n) time slots. We the...

This paper defines principles for organizing semantic relations represented by slots in frame-structured knowledge bases. We consider not only the ways in which slots are used for reasoning about a given domain but also the features of the representation language of the knowledge-based system in which the slots reside. We find that the organization of slots may be based on the knowledge-level s...

Recently standardized wireless systems have multiple Time-Slots in a radio frame, but existing MUMIMO schedulers are not utilizing multiple Time-Slots efficiently. In this paper we propose a sub-optimal user grouping algorithm utilizing multiple Time-Slots efficiently. The proposed algorithm disperses highly-correlated users in different Time-Slots to prevent severe degradation of spatial multi...