Results 251 to 260 of about 31,821,418 (310)
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Constant-current D-C transmission
Electrical Engineering, 1935High voltage d-c electric power transmission has been envisioned for many years, but numerous obstacles have prevented its use to any great extent. Most of these obstacles appear to be over come in the system described in this paper; this system comprises conversion of constant-potential a-c power to constant-current d-c power, transmission of constant-
C.H. Willis, B.D. Bedford, F.R. Elder
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The Calculation of the Regulation Characteristics of D-C Transmission Systems
IEEE Transactions on Power Apparatus and Systems, 1964An account is given of a method for determining the performance characteristics of one terminal of a d-c transmission system taking into account the supply system, the filter bank, and, in the most general case, the synchronous-compensators whose reactive power output is made dependent on the converter-transformer line voltage.
A. Gavrilovic, D. G. Taylor
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D-C transformers and transmission
Electrical Engineering, 1938T. C. Lennox and E. V. De Blieux in a very interesting paper “A D-C Transformer,” published in the Transactions section of the September 1938 issue of Electrical Engineering on pages 554 to 558, describe a device using a mechanical commutator in conjunction with stationary transformers to transform direct current from one voltage to another.
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Economic Aspects of D-C Power Transmission
Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1957Results of the study may be summarized as follows: 1. A number of d-c overhead and underground power-transmission systems were designed, with a-c generation and electronic power converters at both ends, operating on a constant-voltage principle. The d-c systems are designed for the same security and reliability conditions as the corresponding a-c ...
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The Lancet, 1995
In 1978-79 a single-source outbreak of hepatitis C occurred in 2533 women who had received virus-contaminated anti-D immunoglobulin. Children and husbands of 74 women with self-limited, and of 86 women with chronic, hepatitis C were followed up for over 10-15 years.
H, Meisel +7 more
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In 1978-79 a single-source outbreak of hepatitis C occurred in 2533 women who had received virus-contaminated anti-D immunoglobulin. Children and husbands of 74 women with self-limited, and of 86 women with chronic, hepatitis C were followed up for over 10-15 years.
H, Meisel +7 more
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Preferential in-utero transmission of HIV-1 subtype C as compared to HIV-1 subtype A or D
AIDS, 2004To determine whether different HIV-1 genotypes present in a single cohort, in Dar es Salaam, Tanzania, showed differences in timing for transmission from mothers to their infants.We determined the maternal viral load, transmission time, and the HIV-1 envelope (env) subtype of 253 HIV-1-infected infants enrolled in a randomized double-blind placebo ...
Boris, Renjifo +6 more
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