In this paper we report some results on the estimation of the far-field of an antenna by using a low-cost amplitude-only near-field measurement setup. A simple experimental setup is used to measure the intensity of the near-field of the antenna under test (AUT) on two planes. The measured intensity of the near field is then numerically processed to determine the far-field pattern. The results c...

This paper presents a simple, low-cost, and novel technique for measuring the temporal pulse shape of a nanosecond laser pulse accurately and consistently. The measurement configuration consists of a focusing lens, a tapered rod, and a digital noise filter. Using this setup, the pulsewidth of a nitrogen laser has been determined experimentally. Compared with an unaided measurement configuration...

1.1 The background on the ELSP The Economic Lot Scheduling Problem (ELSP) is concerned with scheduling the cyclical production of n≥2 products on a single facility in lots that differ in size and, consequently, differ in production times and cycles. The cost items involved are: setup cost and inventory holding cost. A popular category of research for the ELSP is so-called “basic period-based cy...

We study the joint inventory and sales effort management problems of a retailer in a broad context and investigate the optimal policies for a single item, periodic-review system. In each period, the demand is uncertain depending on the sales effort level exerted by the retailer, which incurs an associated cost. The retailer’s objective is to find a joint optimal inventory replenishment and sale...

For general estimable parameters in a nonparametric setup, shrinkage (Stein-rule) and preliminary test estimator versions of U-statistics are considered for the (multi-parameter) minimum risk sequential estimation problem. In the usual fashion, allowing the cost per unit sample to be small, an asymptotic model is framed, and in this setup, the asymptotic distributional risks of these versions o...

This paper presents a mathematical programming model for dynamic cell formation to minimize changeover-related costs (i.e., machine relocation costs and machine setup cost) and inter-cell material handling cost to cope with the volatile production environments in apparel manufacturing industry. The model is formulated through findings of a comprehensive literature review. Developed model is val...

We analyse the cost performance of LAN interconnection over ATM using switched VC. Frame loss due to buuer overrow during connection setup has been taken into consideration in the proposed cost function. We investigate the eeect of the length of the holding time of an idle VC on the total cost per frame transmitted. Our simulation results suggest that there is no optimum holding time for minimi...

Tissue, organ and organoid cultures provide suitable models for developmental studies, but our understanding of how the organs are assembled at the single-cell level still remains unclear. We describe here a novel fixed z-direction (FiZD) culture setup that permits high-resolution confocal imaging of organoids and embryonic tissues. In a FiZD culture a permeable membrane compresses the tissues ...

Increasing demand for wireless mobile communications, coupled with limited network resources, has motivated investigation into alternative e cient mobility management solutions. In this paper, we consider wireless PCS call setup protocols. We propose a Lightweight Location Lookup Protocol, which signi cantly reduces the network signaling and setup delay during call setup. As an alternative, we ...