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Related Concept Videos

Errors in Taping01:18

Errors in Taping

Errors in taping arise from multiple factors that can significantly impact measurement accuracy in surveying. Misalignment of the tape, often due to human error, is one primary source. A skilled rear tapeman, using a telescope, can help correct alignment by guiding the head tapeman; however, human limitations still lead to small inaccuracies. These errors may include misplacement of pins or inaccurate tape readings due to common visual confusions, such as mistaking a six for a nine. Such...
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...

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Related Experiment Video

Updated: Jun 12, 2026

Flow-pattern Guided Fabrication of High-density Barcode Antibody Microarray
09:05

Flow-pattern Guided Fabrication of High-density Barcode Antibody Microarray

Published on: January 6, 2016

Characterization and design of bar code systems for accurate alignment.

Y Li

    Applied Optics
    |June 10, 2010
    PubMed
    Summary

    This study uses the main peak of barcode autocorrelation for accurate alignment. Researchers designed new barcodes to enhance this peak

    Area of Science:

    • Optics and Photonics
    • Signal Processing
    • Data Encoding

    Background:

    • Accurate alignment is crucial in various applications utilizing barcode technology.
    • The autocorrelation function of barcodes contains a main peak indicative of alignment.
    • Enhancing this peak's contrast is key for reliable signal detection.

    Purpose of the Study:

    • To investigate methods for increasing the contrast of the main autocorrelation peak in barcodes.
    • To explore the upper limits of achievable contrast for accurate alignment signals.
    • To design and categorize a series of barcodes optimized for alignment performance.

    Main Methods:

    • Utilizing the main peak of the autocorrelation function as an alignment signal.
    • Developing novel barcode designs to improve peak contrast.

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    Large-area Scanning Probe Nanolithography Facilitated by Automated Alignment and Its Application to Substrate Fabrication for Cell Culture Studies
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    Last Updated: Jun 12, 2026

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  • Classifying designed barcodes based on their performance characteristics.

    • Main Results:

    • Demonstrated a method to significantly enhance the contrast of the main autocorrelation peak.
    • Introduced a series of barcode categories with distinct alignment performance.
    • Established internal relationships between different barcode categories.

    Conclusions:

    • The main autocorrelation peak is a viable signal for accurate barcode alignment.
    • Barcode design directly influences alignment signal contrast and performance.
    • The developed barcode series offers tailored solutions for diverse alignment requirements.