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Related Concept Videos

Compact Bone01:27

Compact Bone

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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...
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Compacting Factor test01:22

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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,...
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Econometric Views (EViews)01:29

Econometric Views (EViews)

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Econometric Views, often stylized as EViews, is a package that merges statistical analysis with econometric studies. It is designed to provide tools for time series analysis, forecasting, and econometric model simulation. The software originated from MicroTSP software and has evolved significantly since its inception in 1981. The history of EViews is marked by a continuous effort to enhance its computational speed and user interface. It was initially developed for large computing systems but...
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Cranial Bones: Lateral View01:27

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The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
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Revisionist Views of Adolescent and Adult Cognition01:24

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A revisionist approach to Jean Piaget's theory of cognitive development has brought new insights that challenge and reinterpret his established ideas. Piaget proposed that the formal operational stage, emerging in adolescence, represents the culmination of cognitive maturity. During this stage, individuals are said to develop abstract thinking, engage in systematic problem-solving, and show a form of egocentrism, believing others are as preoccupied with their behavior as they are...
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The superior view of the cranium shows the frontal and paired parietal bones.
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Related Experiment Video

Updated: Feb 11, 2026

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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Compact lensless subpixel resolution large field of view microscope.

Manon Rostykus, Mattia Rossi, Christophe Moser

    Optics Letters
    |April 14, 2018
    PubMed
    Summary

    This study presents a novel compact lensless microscope achieving subpixel resolution. The method uses wavelength-tuned illumination and super-resolution algorithms for enhanced imaging capabilities.

    Area of Science:

    • Microscopy
    • Optical Engineering
    • Image Processing

    Background:

    • Traditional microscopes face limitations in achieving high spatial resolution in compact designs.
    • Lensless microscopy offers a simplified optical path but often struggles with resolution limits.

    Purpose of the Study:

    • To develop and demonstrate a method for significantly increasing spatial resolution in a compact lensless microscope.
    • To achieve subpixel resolution imaging over a large field of view.

    Main Methods:

    • Fabrication of a compact side illumination system using a volume phase grating.
    • Utilizing a tunable semiconductor laser (vertical-cavity surface-emitting laser) for wavelength-selective diffraction.
    • Acquiring subpixel-shifted digital inline holograms and processing them with a super-resolution algorithm.

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    Main Results:

    • Demonstrated subpixel resolution of approximately 2.76 μm.
    • Achieved imaging over a large field of view (FOV) of approximately 28 mm².
    • The compact device has a height of less than 2 cm, with an original pixel size of 5.2 μm.

    Conclusions:

    • The developed technique effectively enhances spatial resolution in compact lensless microscopes.
    • This method enables high-resolution imaging over a large FOV, suitable for various applications.
    • The compact and high-resolution nature of the microscope opens possibilities for portable diagnostic tools.