This paper presents a cavity-backed antenna array in substrate integrated waveguide (SIW) technology the millimeter-wave frequency band. The proposed design uses double slots as radiating elements instead of conventional single slots. allow better control operating bands antenna. performance antennas with and is compared to assess enhanced behavior As proof concept, 2 × designed, manufactured, ...

This paper presents a microstrip antenna using CPW-fed heptagonal shaped antenna embedded with triangular shaped slots for WLAN/WIMAX applications. The proposed antenna provides an impedance bandwidth of 3.08 GHz. The antenna exhibits dual frequency bands 3.4 GHz to 6.48 GHz, covering WLAN and WiMAX bands. The parametric study is performed to understand the characteristics of the proposed anten...

Induction machines are perhaps the most widely used of all electric motors. They are generally simple to build and rugged, offer reasonable asynchronous performance: a manageable torque-speed curve, stable operation under load, and generally satisfactory efficiency. Because they are so widely used, they are worth understanding. In addition to their current economic importance, induction motors ...

In this paper, we have designed the patch array antennas with the slots capable of working in millimeter-wave radar system. The designed array antennas have multi-band characteristics at 77GHz. As a result, this paper is proposed the possibility of prototyping by design and analysis of microstrip array antennas for mm-wave radar as using a patch arrays with U-shaped slots.

Many studies on working memory have assumed that one can determine an individual's fixed memory capacity. In the current study, we took an individual differences approach to investigate whether visual working memory (VWM) capacity was stable irrespective of the number of to-be-remembered objects and participant age. Younger and older adults performed a change detection task using several object...

Ad hoc networks offer infrastructure free operation, where no entity can provide reliable coordination among nodes. Medium Access Control (MAC) protocols in such a network must overcome the inherent unreliability of the network and provide high throughput and adequate fairness to the different flows of traffic. In this paper, we propose a MAC protocol that can achieve an excellent balance betwe...

We introduce quantum databases, a new database abstraction that allows to defer the making of choices in transactions until an application or user forces the choices by observation. Conceptually, a transaction is in a quantum state – in one of many possible worlds, which one is unknown – until fixed by observation. Practically, our abstraction enables late binding of values read from the databa...

Input buffered switches are known to suffer from head-of-line blocking that limits the throughput to 58.6%. It has been shown that with virtual output queueing (VOQ) 100% throughput can be achieved using arbitration algorithms. While dynamic algorithms decide based on some metrics in each time slot, a static arbitration called allocation reserves time slots for specific connections in advance. ...

In this paper we discuss the throughput achievable in inputqueued cell-based switches loaded with multicast traffic. The switch architecture is assumed to comprise a synchronous broadcast switching fabric, where fixed-size data units, called cells, can be transferred in one slot from one input to any set of outputs. The switch scheduler must select the time slots for transfers of non-conflictin...

Maxillonasal dysplasia or Binder's syndrome is an uncommon congenital condition characterized by a retruded mid-face with an extremely flat nose. We report here six patients with maxillonasal dysplasia whose noses were corrected with onlay costal cartilage grafts using a combined oral vestibular and external rhinoplasty approach for nasal dorsal augmentation, columellar lengthening, and premaxi...