Moisture Movement
Moisture Movement - Related Videos
06:16
Determination of Moisture Content in Soil
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Bradley Schmitz Soils normally contain a finite amount of water, which can be expressed as the “soil moisture content.” This moisture exists within the pore spaces in between soil aggregates (inter-aggregate pore space) and within soil aggregates (intra-aggregate pore space) (Figure 1). Normally this pore space is occupied by air and/or water. If all the pores are occupied by air, the...
01:10
Moisture Content and Bulking of Aggregate
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2024
The moisture content of aggregates is a crucial factor in construction, particularly in concrete mixing, as it influences the total water required in the mix. Moisture content represents the water coated on the exterior surface of the aggregate existing in a saturated and surface-dry condition. The total water content of a moist aggregate is the sum of its moisture content and water absorption. When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
08:06
Eye Movement Monitoring of Memory
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Cited by 10 •
2010
Eye movement monitoring (or eye tracking) reveals where in space the eyes linger, when and for how long. Here, we demonstrate how eye tracking can be used to investigate the integrity of memory in multiple participant populations, without requiring verbal, or otherwise explicit, reports.
08:20
In Situ Soil Moisture Sensors in Undisturbed Soils
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Cited by 7 •
2022
The determination of soil water content is a critical mission requirement for many state and federal agencies. This protocol synthesizes multi-agency efforts to measure soil water content using buried in situ sensors.
00:51
Anatomical Movements
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2023
Anatomical movements refer to the various actions or motions that can be performed by the body's joints and muscles. These movements are described using specific terms to provide a standardized way of discussing and understanding the range of motion at different joints. Here are some common anatomical movements: Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist, metacarpophalangeal,...
FAQs
Moisture movement responds to different driving forces rather than a single universal mechanism. Concentration or vapor-pressure differences promote diffusion, while hydraulic-pressure differences can produce capillary flow or bulk liquid movement. The dominant pathway depends on the material’s pores, cracks, and connected channels. Separating these mechanisms helps engineers predict whether moisture will spread gradually, wick through a material, or move as liquid.
They determine how readily water can travel through a material or system. Pores can support capillary transport, whereas cracks and other connected pathways may provide routes for more direct liquid movement. Because pathway structure interacts with concentration, vapor-pressure, and hydraulic-pressure differences, the same environmental condition can produce different transport behavior in different materials.
Vapor transport is linked to diffusion driven by differences in moisture concentration or vapor pressure. Liquid movement may occur through capillary flow or bulk liquid transport, particularly where hydraulic pressure and connected pathways support it. This distinction matters because engineering responses differ: vapor control may require barriers or ventilation, while liquid problems may call for drainage or durable materials.
A practical engineering analysis first identifies the relevant gradient: moisture concentration, vapor pressure, or hydraulic pressure. It then considers whether pores, cracks, or connected pathways permit diffusion, capillary flow, or bulk liquid movement. Engineers can use that assessment to anticipate condensation, drying, leakage, or degradation and to compare barriers, drainage, ventilation, and material choices.
Applications extend across buildings, soils, concrete, and porous composites. In buildings, the analysis relates to condensation, energy performance, and environmental control. In soils and concrete, it helps assess transport pathways and conditions associated with drying, leakage, or degradation. For porous composites, understanding the same mechanisms supports material selection and durability decisions.
Control measures should match the dominant transport route and the engineering objective. Barriers can be selected to limit unwanted transfer, drainage strategies can manage liquid pathways, and ventilation conditions can influence the surrounding moisture environment. Choosing durable materials adds resilience when exposure cannot be eliminated. Together, these decisions support structural durability, energy performance, and environmental control.