Three dimensional (3D), finite element (FE) models and original lumped-parameter networks are developed for the transient thermal analysis of a permanent magnet synchronous motor (PMSM) and an induction motor (IM) specifically designed and optimized for a demanding aerospace actuation application. A systematic comparison between the two different thermal modeling approaches is carried out using...

This paper presents a monolithically integrated broadband lumped-element Wilkinson power divider centered at 20 GHz, which was designed and fabricated to uniformly distribute power to arrays of Josephson junctions (JJs) for superconducting voltage standards. This solution achieves a fourfold decrease in chip area, and a twofold increase in bandwidth (BW) when compared to the previous narrowband...

This letter presents miniaturized Gysel power dividers using lumped-element components. The characteristic impedances of all the equivalent transmission lines in these dividers are fixed to the same values based on even and odd mode analysis, thus simplifying the design procedure and miniaturizing the Gysel power dividers. The ideal divider designed at a frequency of 590MHz exhibits power split...

In this paper, two compact lumped element models synthesis methods for distributed passive electromagnetic structures are presented. The first method is based on the canonical Foster representation while the second method uses the Brune’s synthesis procedure which is a more general approach capable to account for lossy structures. Both methods, used in combination with a system identification a...

A hybrid design tool combining one-dimensional (1D) lumped parameter model and three-dimensional (3D) computational fluid dynamics (CFD) approach has been developed and applied to industrial inkjet head design for the application of direct writing on printed circuit boards (PCB). Lumped element modeling technique is applied to simplify the composite Inkjet print head system and the calculation ...

In the present paper we focus on how a benevolent government would react to a change in the budget deficit restriction. When financial markets are perfect, anonymous lump-sum taxes are sufficient to achieve irrelevance and the maximal attainable welfare is unaffected by the change in the restriction. With imperfect consumer credit markets welfare irrelevance may not hold. In a pure exchange eco...

When to allow Research Joint Ventures (RJVs) or not is an important instrument in the development of an optimal R&D policy. The regulator, however, is unlikely to know all the relevant information to regulate R&D optimally. The extent to which there exist appropriability problems between the firms is one such variable that is private information to the firms in the industry. In a duopoly settin...

1. I agree with Professor Medina that identity is relative to fields in such a way that whenever X and Y are identical, they are always identical in some respect and their being identical in this way does not preclude their also being different in other respects. This statue may be the same lump of clay I saw in your workshop yesterday but not the same statue I saw, since it hadn’t yet been sha...

Connecting private dwellings to the water main is expensive and typically cannot be publicly financed. We show that households’ willingness to pay for a private connection is high when it can be purchased on credit, not because a connection improves health but because it increases the time available for leisure and reduces interand intra-household conflicts on water matters, leading to sustaine...

Slotting allowances are lump-sum payments that manufacturers make to retailers for shelf space. They have become increasingly widespread in recent years, particularly in the grocery industry. A popular view is that these payments arise because there are more products to choose from than can be profitably carried given the availability of shelf space. Under this view, slotting allowances arise b...