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Related Concept Videos

Manufacture of Concrete Masonry Units01:27

Manufacture of Concrete Masonry Units

The process of manufacturing concrete masonry units begins by mixing stiff concrete composed of Portland cement, aggregates, and water. This mixture is then poured into metal molds. To ensure the concrete settles uniformly and to avoid separation of its components, the mixture in the molds is subjected to vibration. Shortly after, the still-wet blocks are removed from the molds and placed on racks.
These wet blocks are then transported for curing, which can occur in one of two environments: a...
Brick Cutting Techniques01:08

Brick Cutting Techniques

Brick-cutting techniques involve various tools and methods to shape bricks for construction. A mason's hammer with a chisel-pointed end is used for basic shaping through sharp, precise strikes. For more complex shapes requiring higher precision, a power saw with a water-cooled diamond blade is used.
Cut bricks are categorized by size. Bricks cut to half their original length are called half-bats, while those cut to three-fourths their length are known as three-fourth bats.
Special types of cut...
Leveling Equipment01:18

Leveling Equipment

As leveling involves measuring vertical distances relative to a horizontal line of sight, it requires a graduated rod, called a level rod, for vertical measurements and an instrument called a level for a horizontal sight line. A level includes a high-powered telescope with a mechanism for leveling to ensure the line of sight is horizontal when the bubble in the spirit level is centered. Leveling rods, made of wood, metal, or fiberglass, are graduated in feet or meters and commonly used in two-...
Ready Mixed Concrete01:26

Ready Mixed Concrete

Ready-mixed concrete, also known as pre-mixed concrete, is prepared in a centralized plant and then transported in trucks to construction sites where it is ready for placement. This type of concrete is categorized into central-mixed, truck-mixed (or transit-mixed), and shrink-mixed. Central-mixed concrete is entirely prepared at a plant and moved to the site in agitator trucks that rotate at a speed of 2 to 6 rpm. Truck-mixed concrete, on the other hand, has the ingredients batched at the plant...
Cold Weather Concreting01:27

Cold Weather Concreting

When freshly poured concrete is exposed to freezing temperatures before it has set, the water within the concrete can freeze. This expansion disrupts the setting process, delays chemical reactions necessary for hardening, and increases the volume of pores within the hardened concrete, which weakens its overall structure. If the concrete manages to reach an appreciable strength before it freezes, the damage can be somewhat mitigated.
To counteract the negative impacts of cold weather, ensuring...
Mechanical Efficiency of Real Machines01:14

Mechanical Efficiency of Real Machines

The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
However, in reality, no machine can be truly ideal, and all of them experience some...

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Mistletoe Eradicator - A Novel Tool for Simultaneous Mechanical and Chemical Control of Mistletoe
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New tools for JCB.

Elizabeth H Williams, Tom Misteli

    The Journal of Cell Biology
    |September 7, 2011
    PubMed
    Summary
    This summary is machine-generated.

    The Journal of Cell Biology (JCB) introduces new publishing options to support scientific innovation. These include a new article type for methods and datasets, and an enhanced data viewer.

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    Published on: March 1, 2022

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    Area of Science:

    • Cell Biology
    • Scientific Publishing
    • Data Science

    Background:

    • Advancements in cell biology research demand novel platforms for disseminating methods and high-throughput data.
    • Existing publication models may not fully accommodate the detailed nature of modern biological datasets.

    Discussion:

    • The Journal of Cell Biology (JCB) is launching 'Tools,' a new article type specifically for detailed method descriptions and high-throughput datasets.
    • JCB is also introducing an updated JCB DataViewer interface designed to host entire high-content screening datasets.

    Key Insights:

    • This initiative addresses the need for specialized publication venues for complex biological data.
    • The 'Tools' article type and enhanced DataViewer facilitate comprehensive data sharing and reproducibility.

    Outlook:

    • These changes aim to foster greater transparency and accessibility in cell biology research.
    • JCB's innovation in publishing supports the evolving landscape of data-intensive biological discovery.