A Broadband High-Gain Bi-Layer Log-Periodic Dipole Array (LPDA) for Ultra High Frequency (UHF) Conformal Load Bearing Antenna Structures (CLAS) Applications

2014 ◽  
Author(s):  
Nicholas A. Bishop ◽  
Mohammod Ali ◽  
Jason Miller ◽  
David L. Zeppettella ◽  
William Baron ◽  
...  
Keyword(s):  
High Frequency ◽  
High Gain ◽  
Load Bearing ◽  
Ultra High Frequency

scholarly journals Analysis and Design of 10-Element Yagi-Uda Antenna

2020 ◽  
Vol 25 (1) ◽  
pp. 1-8
Author(s):  
Mohanad Abdulhamid
Keyword(s):  
High Frequency ◽  
High Gain ◽  
Ultra High Frequency ◽  
Analysis And Design ◽  
Yagi Antenna ◽  
Optimal Spacing ◽  
To Come

AbstractThe main aim of this paper is to come up with a 10-element Ultra High Frequency (UHF) aerial with optimal spacing that gives clear TV reception. A Yagi antenna is chosen for this study due to its high directionality, broadband capability, high gain and the availability of materials locally. An attempt is made to simulate the entire antenna and test it on a Samsung TV set.

Ultra-High-Frequency Pairs Trading in Gold ETFs

2017 ◽  
Author(s):  
Thong Dao ◽  
Frank McGroarty ◽  
Andrew Urquhart
Keyword(s):  
High Frequency ◽  
Pairs Trading ◽  
Ultra High Frequency

MODELING AND EXPERIMENTAL VERIFICATION OF AIR-THERMAL AND MICROWAVE-CONVECTIVE PRESOWING SEED TREATMENT

2020 ◽  
Vol 4 (41) ◽  
pp. 35-43
Author(s):  
ALEKSEY A. VASIL’EV ◽  
◽  
ALEKSEY N. VASIL’EV ◽  
DMITRIY BUDNIKOV ◽  
ANTON SHARKO
Keyword(s):  
High Frequency ◽  
Seed Treatment ◽  
Field Experiments ◽  
Research Purpose ◽  
Dense Layer ◽  
Technological Equipment ◽  
External Influence ◽  
Ultra High Frequency ◽  
Grain Processing ◽  
Seed Processing

The use of electrophysical influences for pre-sowing treatment of seeds is an effective way to increase their sowing quality. The use of these methods is limited by the fact that their implementation requires new technological equipment in grain processing lines. This problem is solved more easily when pre-sowing processing is performed using installations for active ventilation and grain drying. (Research purpose) The research purpose is in determining the possibility of using active ventilation units and ultra-high-frequency convective grain dryers for pre-sowing grain processing and to evaluating the effectiveness of such processing using computer modeling. (Materials and methods) It is necessary to ensure the uniformity of processing with external influence the seeds placed in a dense layer. Authors carried out pre-sowing treatment of seeds on real installations. Treated seeds were sown in experimental plots and the results of treatment were evaluated. (Results and discussion) The article presents graphs of changes in grain temperature and humidity during processing. To check the feasibility of pre-sowing treatment, authors performed modeling of air-heat and ultra-high-frequency convective seed treatment processes. Based on the results of field experiments, air-heat treatment stimulates the development of secondary plant roots, contributes to an intensive increase in the green mass of plants; ultra-high-frequency convective seed treatment allows increasing the number of productive stems in plants, the number of ears in one plant. (Conclusions) Technological equipment designed for drying and active ventilation of grain can be effectively used for pre-sowing seed processing. In the course of field experiments, it was revealed the possibility of controlling the structure of the crop using different types of external influence on seeds during their pre-sowing processing.

scholarly journals Ultra high frequency ultrasonography to distinguish ganglionic from aganglionic bowel wall in Hirschsprung disease: A first report

2021 ◽  
Author(s):  
Christina Granéli ◽  
Tobias Erlöv ◽  
Rodrigo Munoz Mitev ◽  
Ioanna Kasselaki ◽  
Kristine Hagelsteen ◽  
...  
Keyword(s):  
High Frequency ◽  
Bowel Wall ◽  
Hirschsprung Disease ◽  
First Report ◽  
Ultra High Frequency ◽  
High Frequency Ultrasonography

Evaluation of frontal fibrosing alopecia with ultra‐high‐frequency ultrasound

2021 ◽  
Author(s):  
Carolina Ávila de Almeida ◽  
Simone Guarçoni ◽  
Bruna Duque Estrada ◽  
Maria Carolina Zafra Páez ◽  
Clarissa Canella
Keyword(s):  
High Frequency ◽  
High Frequency Ultrasound ◽  
Ultra High Frequency ◽  
Frequency Ultrasound
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