The expulsion of a primary infection of Trichinella spiralis was studied in rats fed diets containing (per kg diet) either 3 mg Zn [zinc deficient (Zn-)] or 40 mg Zn [zinc adequate (Zn+)]. A dose of 2000 muscle larvae (ML) impaired weight gain (mg/g body wt) in all groups compared with uninfected controls [eg, 0-7 d postinfection (dpi): infected Zn-, -105 +/- 10 (means +/- SEM); uninfected Zn-, 54 +/- 19 (p less than 0.001)]. In a study with 20.5 ML/g body wt, some Zn- rats were transferred at the time of infection to the zinc-adequate diet. [This was the zinc-repleted group (ZnR).] Both groups retained a group of pair-fed controls (Zn-PF and ZnRPF). The percentage dose established at 7 dpi was similar in all groups (32.5-39.3%) but at 13 dpi recoveries were 19.4 +/- 2.2% for Zn-, 0.1 +/- 0.1% for Zn-PF, 1.6 +/- 0.9% for ZnR, 0.6 +/- 0.2% for ZnRPF, and 4.1 +/- 2.2% for Zn+ (p less than 0.001). Up to 13 dpi, all groups except ZnR lost weight. These results show that zinc deficiency impairs the expulsion of T spiralis in rats.

Abstmc&--An original finite element method for calculating twoaxis transient parameters of solid rotor turbine-generators, is presented. Eddy current effects are lumped into equivalent damper circuits representing layers of massive conductors within the rotor. The time variation of machine parameters of a two-axis model is determined and the equivalent circuits obtained are tested by comparing the two-axis and finite element simulations. The two-axis equivalent circuits can simulate a wide range of operating conditions, with appropriate modification of the magnetizing inductances.

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The course of a subcutaneous weight-related infection with Strongyloides ratti was followed in rats fed diets containing either 3 mg Zn/kg diet [zinc deficient (Zn-)] or 40 mg Zn/kg diet [zinc adequate (Zn+)]. At 19 d postinfection (dpi) the proportions of larvae persisting in the intestines as adult worms were 52 +/- 2% (means +/- SEM) for Zn-, 39.5 +/- 2.5% for pair-fed Zn- (Zn-PF), and 31.6 +/- 3.2% for Zn+ (p less than 0.001, analysis of variance); some Zn- rats were then transferred to the zinc-adequate diet [This was the zinc-repleted group (ZnR).] Both groups retained a group of pair-fed controls (Zn-PF and ZnRPF). Between 19 and 28 dpi ZnR animals gained weight faster than did Zn- animals and had heavier thymuses relative to body weight. Zinc deficiency enhances the establishment of S ratti larvae in the intestine of rats and alters the characteristics of intestinal expulsion of the nematodes; however, spontaneous cure was achieved by 38 dpi in both Zn- and control groups.

Abstract-The decentralized design of low-order rohust damping controllers is presented based on a weighted and normalized eigenvalue-distance minimization method (WNEDM) employing several superconducting magnetic energy storage (SMES) devices. These controllers are aimed at enhancing the damping of multiple inter-area modes in a large power system. This paper describes a comprehensive and systematic way of designing these controllers. Non-linear simulations further verify the robustness of the damping controllers for various operating conditions.h d e x Terms-Decentralized control, Hankel singular valne (HSV), inter-area oscillation, model reduction, power system damping contmller (PSDC), robust stabilization, superconducting magnetic energy storage.