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Heart Rate Variability and Cognitive Function as Potential Endophenotypes in Schizophrenia: A Cross-Sectional Observational Study Using First-Degree Relatives. [PDF]

Cureus
Samanta P, Parida BB, Pattnaik JI, Das RC, Kumari R, Parekh V, Mishra J, Sahoo J, Senapati LK.   +8 more
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COITAL FREQUENCY AND SEX RATIO

The Lancet, 1971
openaire   +4 more sources

Compact Dual-Frequency Antenna Array With Large Frequency Ratio

IEEE Transactions on Antennas and Propagation, 2021
A dual-fed dual-frequency shared-aperture antenna array with a large frequency ratio is investigated. Its unit cell consists of a microwave ground-surrounded patch antenna and a millimeter-wave substrate-integrated $2\times {2}$ slot antenna subarray.
Zhen-Xing Xia, Kwok Wa Leung, Nan Yang, Kai Lu   +3 more
openaire   +1 more source

Miniaturized multiband frequency selective surface with wide frequency ratio

Microwave and Optical Technology Letters, 2022
AbstractThis article presents the design of a novel miniaturized 2.5D frequency selective surface (FSS) for radiofrequency and microwave shielding applications is proposed. The proposed FSS is configured to offer multiple band‐stop characteristics with a wide frequency ratio. The unit cell is developed using traces that run on the top and bottom layers
Anbuselvi Mathivanan, Palani Saravanan
openaire   +1 more source

Wideband Dual-Frequency Antenna With Large Frequency Ratio

IEEE Transactions on Antennas and Propagation, 2019
This communication investigates a new type of compact dual-frequency antenna, which is realized by using a single rectangular dielectric block with a groove along its center. It integrates a microwave dielectric resonator antenna (DRA) with a millimeter-wave Fabry–Perot resonator antenna (FPRA).
Li Ying Feng, Kwok Wa Leung
openaire   +1 more source

Variable ratio frequency converter

Electrical Engineering, 1932
Two synchronous-induction frequency converters with controllable frequency ratio and full automatic features were chosen to tie a 25-cycle and a 60-cycle system. Consideration of generation loads, load cycles, and stability of both systems led to the selection of this type of unit.
L. V. Nelson, E. L. Hough
openaire   +1 more source

Two-Wire Ratio-Frequency Converter

ESSCIRC '86: Twelfth European Solid-State Circuits Conference, 1986
An integrated two-wire ratio-frequency converter is presented for use as a remote signal conditioner for sensor bridges such as strain-gauges or temperature-sensing bridges. The converter has a center frequency of 10 kHz and a sensitivity of 1 Hz per 10?6 variation in relative bridge output.
J.H. Huijsing, G.A. van Rossum, M. van der Lee   +2 more
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Automatic control for variable ratio frequency converters

Electrical Engineering, 1931
An automatic switching equipment for the control of two 20,000-kw. frequency changer sets using the Scherbius method of load and power factor control has been in successful operation at the Page Avenue station of the Union Electric Light and Power Company of St. Louis, for almost a year.
E. K. Shively, Geo. S. Whitlow
openaire   +1 more source