Figure 2. Bearing capacity determined from astronaut bootprints (Modulus of Subgrade Reaction) [2]. Inset (upper left) shows a cross-section of bootprint and the forces involved. Other parameters can be measured using the astronaut’s boot or walking stick. They include surface temperature, dust accumulation, and penetrometry. These and other sensors will provide useful material information to g...

Abstract Thecemententerprisebetheessentialhotspotintendedfornaturalcontamination because it admissions a tremendous measure of energy during the creationas well as deliveries ton CO2which adds to an unnatural weather change. Reducethese impacts, concrete is some degree subbed among blend Silica Fume (SF) and Fly Ash (FA) sand by Quarry Dust (QD) with addition steel fibre. This paper centered on...

Abstract Background Dust accumulation covers the leaf’s surface and influences foliar physiological activity. Two independent experiments were carried out to instigate responses dust penetration limitation of small particles (< 1 μm) on surface, respectively. In experiment I, three intensities achieved by a spraying treatment. Photosynthesis CO 2 exchange fast chlorophyll fluorescence transi...

background: composition of dust in the air due to contact with human via inhalation, ingestion and skin absorption will have a large impact on public health. in the learning environments such as universities, many people spend most of their day in contact with the dust. the purpose of this study was to evaluate the concentration of heavy metals lead, chromium and copper in the training space of...

Ice fields on Kilimanjaro (5895 m a.s.l., Tanzania) are retreating and 85% of the ice cover has been lost since 1912. The degree to which this recession is exceptional during the Holocene is uncertain, as age control of the entire ice stratigraphy exists only for the very shallow and very bottom ice of the Northern Ice Field. This empirical evidence suggests that the Kilimanjaro ice cover may b...

Deposited mineral dust and black carbon are known to reduce the albedo of snow and enhance melt. Here we estimate the contribution of anthropogenic black carbon (BC) to snowmelt in glacier accumulation zones of Central Asia based on in-situ measurements and modelling. Source apportionment suggests that more than 94% of the BC is emitted from mostly regional anthropogenic sources while the remai...

The standard model of planet formation was initially developed to help explain how planets could have formed around our isolated sun. This model typically begins with a protoplanetary disk of gas and dust orbiting a young protostar. Growth of terrestrial planets in such a disk is usually treated in three stages: [stage I] accretion of dust particles into 10 to 10 gram (kilometer-size) planetesi...

The residual levels of permethrin, a pyrethroid insecticide, in two different parts of treated cereal grains have been evaluated. The parts of the grains studied include the husk/bran and the endosperm. In this research, two commonly used fresh grains, millet and corn, were obtained from Dawanau market of Kano State. The fresh grains were spiked with permethrin pesticide commercially known as c...