Compacting Table
Compacting Table - Related Videos
01:27
Compact Bone
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2025
Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function. Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
01:22
Compacting Factor test
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2024
The compacting factor test is a method used to assess the workability of concrete. It is especially suitable for concrete mixes containing aggregates up to one and a half inches in size. This test involves specialized equipment consisting of two truncated cone-shaped hoppers and a cylinder, all with polished interior surfaces to minimize friction. The procedure begins by placing concrete into the upper hopper without any compaction. Once filled, the bottom door of this hopper is opened,...
05:32
A High-performance Compact Photoacoustic Tomography System for In Vivo Small-animal Brain Imaging
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Cited by 11 •
2017
A compact pulsed-laser diode-based photoacoustic tomography (PLD-PAT) system for high-speed in vivo brain imaging in small animals is demonstrated.
01:12
Flow Table Test
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2024
The flow table test is an established method used to assess the workability of concrete, particularly useful for evaluating highly flowable concrete mixes. This test employs an apparatus that consists of a wooden board topped with a steel plate, collectively weighing 35 pounds. The board is connected to a base via a hinge and measures 27.6 inches on each side. Concrete is placed within a truncated cone mold that is 8 inches high with an 8-inch base diameter and a 5-inch top diameter. The...
03:17
Cyanobacterial Culture Synchronization and DNA Compaction Driven by Light-Dark Cycles
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2025
Source: Murata, K. et. al., Visualization of DNA Compaction in Cyanobacteria by High-voltage Cryo-electron Tomography. J. Vis. Exp. (2018)This video demonstrates the synchronous cultivation of cyanobacteria under light-dark cycles to study circadian-regulated DNA compaction. Fluorescence microscopy reveals condensed DNA at defined time points, confirming cell cycle alignment across the population.
FAQs
These three settings govern how effectively particles or fresh concrete rearrange and settle. Frequency controls the rate of oscillation, amplitude determines the extent of platform movement, and vibration time determines how long consolidation continues. Controlling them together helps avoid inconsistent density or surface quality and supports repeatable measurements when specimens are prepared for engineering evaluation.
A rigid platform transfers the drive motion to the mold and its contents in a controlled manner. Keeping the mold in place allows vibration to act consistently throughout the material, promoting particle settlement and reducing trapped air. This arrangement is important when specimen uniformity and comparable test results depend on controlled consolidation.
The drive provides the oscillating motion required for controlled compaction. An electric motor or mechanical drive can move the platform at a specified frequency and amplitude, rather than relying on uncontrolled movement. This defined motion makes the preparation process more consistent and helps laboratories produce specimens suitable for reliable comparison and evaluation.
The material or molded specimen is positioned on the rigid platform, with the mold held in place during operation. The operator then applies the specified vibration frequency, amplitude, and duration so the contents can rearrange and settle. Maintaining these conditions consistently improves specimen uniformity, density, and surface quality across repeated preparations.
Applications include concrete testing, powder processing, casting, and materials laboratory work. In concrete testing, the equipment supports consistent molded specimens; in powder processing and casting, it helps consolidate granular or molded material. Across these settings, the main value is producing more uniform material conditions for subsequent evaluation or measurement.
Properly controlled compaction can improve specimen consistency, density, and surface quality while reducing trapped air. These outcomes matter because variation in specimen preparation can affect measurements and material-performance evaluations. By controlling vibration time and intensity, engineers can obtain more repeatable results and make comparisons between specimens or processing conditions with greater confidence.