the most widely used machine for precision sowing of cucumber and sorghum seeds is vacuum type. the performance and distribution accuracy of the vacuum type metering unit is of great importance. therefore, the experiments at three pressures of 25, 35, 45 mbar and two level of forward speed 3 to 4.5 km/h and 6 to 8.5 km/h were conducted and multiple planting, feeding quality and miss planting we...

Pacing strategies in marathon runners have previously been examined, especially with regard to age and performance level separately. However, less information about the age × performance interaction on pacing in age-group runners exists. The aim of the present study was to examine whether runners with similar race time and at different age differ for pacing. Data (women, n=117,595; men, n=180,4...

Observations by the Viking and Cluster satellites at altitudes up to 35 000 km show that Lower Hybrid Cavities (LHCs) are common in the inner magnetosphere. LHCs are density depletions filled with waves in the lower hybrid frequency range. The LHCs have, until recently, only been found at altitudes up to 2000 km. Statistics of the locations and general shape of the LHCs is performed to obtain a...

The large-scale circulation in the Geophysical Fluid Dynamics Laboratory ‘‘SKYHI’’ troposphere–stratosphere–mesosphere finite-difference general circulation model is examined as a function of vertical and horizontal resolution. The experiments examined include one with horizontal grid spacing of ;35 km and another with ;100 km horizontal grid spacing but very high vertical resolution (160 level...

In the early 1960s the urban area speed limit was increased from 30 to 35 mph in Victoria and NSW. With the introduction of metrication in 1974 the urban area speed limit of 35 mph (56 km/h) was changed to 60 km/h throughout Australia. The reason why 60 km/h was selected is discussed. A study of the likely relationship between travelling speeds and the incidence of pedestrian fatalities was con...

[1] We investigate the ionospheric conditions required to explain Mars Express Mars Advanced Radar for Subsurface and Ionosphere Sounding topside radar sounder observations of ionospheric attenuation in excess of 13 dB at 5 MHz during solar energetic particle events. We develop theoretical expressions for the attenuation caused by a layer of ionospheric plasma in cases of high, intermediate, an...