Results 91 to 100 of about 5,372 (205)

Calling songs of certain orthopteran species (Insecta, Orthoptera) in southern Portugal [PDF]

Animal Biodiversity and Conservation, 2001
The calling songs produced by males of the Orthoptera occurring at the field station “Herdade da Ribeira Abaixo” (Centre for Environmental Biology), in Grândola (southern Portugal), are described.
Oliveira, P. A. P., Simoes, P. C., Quartau, J. A.   +2 more
doaj  

System tests with electric thruster beam and accelerator directly powered from laboratory solar arrays [PDF]

Laboratory high voltage solar arrays were operated directly connected to power the beam and accelerator loads of an 8-centimeter ion thruster. The beam array comprised conventional 2 by 2 centimeter solar cells; the accelerator array comprised multiple ...
Stover, J. B.
core   +1 more source

Machine Learning Analysis of Arterial Oscillograms for Depression Level Diagnosis in Cardiovascular Health

Complex Systems Informatics and Modeling Quarterly
The presented study explores the clustering of arterial oscillogram (AO) data among a sample of patients, focusing on ultra-low-frequency (ULF) indicators and their relationship with depression levels.
Vladislav Kaverinsky, Dmytro Vakulenko, Liudmyla Vakulenko, Kyrylo Malakhov   +3 more
doaj   +1 more source

Study of operating modes of the AION tanker electrical power system

Известия высших учебных заведений: Проблемы энергетики
THE PURPOSE. Consider the issue of automation of modern sea vessels with a high degree of electrification. The purpose of the study is to analyze the electrical power system of the AION tanker to determine the possible occurrence of abnormal phenomena ...
A. E. Savenko, I. V. Gabriel
doaj   +1 more source

MODELING INFLUENCE OF ROLLING BEARING BUSH AND VIBRATION DAMPING IN CATCHING OF TOOTHED WHEELS

Nauka ta progres transportu, 2010
On the base of dynamic scheme of toothing, a mathematical model for study of the influence of constructive parameters of radial bearings such as a factor of friction, reduced masses and stiffnesses on damping the vibrations in gearing is developed.
P. V. Diachenko
doaj  

Spark Ignition of Flowing Gases. 2: Effect of Electrode Parameters on Energy Required to Ignite a Propane-Air Mixture [PDF]

Research was conducted to determine the effect of the electrode parameters of spacing, configuration, and material' on the energy required for ignition of a flowing propane-air mixture.
Swett, Clyde. C., Jr.
core   +1 more source

Investigation of an anomalous flow condition of the Langley pilot model expansion tube [PDF]

Free-stream flow velocity measurements were made in the Langley pilot model expansion tube during the test flow interval. During this interval, an anomalous dip in pitot pressure occurs for the expansion tube operating conditions employed.
Friesen, W. J.
core   +1 more source

Experimental studies of a coaxial plasma injector. 1 - Study of operational conditions [PDF]

Parameter optimization, and operation of coaxial plasma ...
Sadowski, M., Skladnik-Sadowska, E.
core   +1 more source

A study of aircraft fire hazards related to natural electrical phenomena Final report, Jun. 1966 - Jul. 1967 [PDF]

Natural electrical phenomena as aircraft fire hazards, with study of flame propagation in fuel vent ...
Gerstein, M., Kester, F. L., Plumer, J. A.   +2 more
core   +1 more source

Transition to turbulence in pipe flows with local swirling at moderate Reynolds numbers

Учёные записки Казанского университета: Серия Физико-математические науки
Using physical experiment and direct numerical simulation, principal patterns were revealed in the evolution of the structure of swirling flows in smooth straight pipes at the Reynolds numbers from 240 to 1640.
V. M. Molochnikov, N. D. Pashkova, E. I. Kalinin, G. E. Chuprin, L. R. Kayumova   +4 more
doaj   +1 more source