関連する実験動画

Updated: Jun 14, 2026

Fiber Connections of the Supplementary Motor Area Revisited: Methodology of Fiber Dissection, DTI, and Three Dimensional Documentation
16:23

Fiber Connections of the Supplementary Motor Area Revisited: Methodology of Fiber Dissection, DTI, and Three Dimensional Documentation

Published on: May 23, 2017

パレオ・インディアン時代の遺物より下層に階層化されたフラーク・ツール

M J Reagan, R M Rowlett, E G Garrison

    Science (New York, N.Y.)
    |June 16, 1978
    PubMed
    まとめ

    ミズーリ州にある古代の石器は,初期の人間の存在を明らかにしています. リシック・ステージのフラーク・ツールは,パレオ・インディアン・フラット・ポイントより古く,紀元前13,000年より古い職業を持つ.

    さらに関連する動画

    Determination of Aggregate Surface Morphology at the Interfacial Transition Zone (ITZ)08:59

    Determination of Aggregate Surface Morphology at the Interfacial Transition Zone (ITZ)

    Published on: December 16, 2019

    A Method to Preserve Wetland Roots and Rhizospheres for Elemental Imaging06:29

    A Method to Preserve Wetland Roots and Rhizospheres for Elemental Imaging

    Published on: February 15, 2021

    関連する概念動画

    Quarrying of Stone01:15

    Quarrying of Stone

    Quarrying is the process of extracting stone from a quarry, where specialized techniques are employed to remove large blocks of stone safely and efficiently. This process can involve controlled explosions or more precision-oriented methods such as cutting and drilling.
    One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the block.
    Veneer01:19

    Veneer

    Veneer refers to a thin sheet of wood, typically produced to a thickness of about one-eighth of an inch or less. This material is crafted through various methods, the most common being rotary cutting. In this process, a log is mounted into a large lathe and spun against a knife edge, peeling off a continuous strip of wood as the knife penetrates deeper into the rotating log, creating a rotary-cut veneer.
    Other veneering techniques include plain-slicing, quarter-slicing, and rift-slicing. These...
    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...