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Related Concept Videos

Design Example: Maintaining Level of an Embankment01:19

Design Example: Maintaining Level of an Embankment

Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
Mechanistic Models: Overview of Compartment Models01:21

Mechanistic Models: Overview of Compartment Models

Mechanistic models, a category encompassing both physiological and compartmental modeling, differ from empirical models' approaches to incorporating known factors about the systems being modeled. Empirical models describe data with minimal assumptions, while mechanistic models aim to provide a robust description of available data by specifying assumptions and integrating known factors about the system. Compartmental analysis is a key example of a mechanistic model in pharmacokinetics and...
Faraday Disk Dynamo01:23

Faraday Disk Dynamo

A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
Introduction and Methods of Leveling01:26

Introduction and Methods of Leveling

Leveling is a surveying procedure used to determine elevation differences between distant points. Elevation refers to the vertical distance above or below a reference datum, typically mean sea level (MSL). In the United States, elevations are often referenced to the mean sea level station at Father Point Rimouski along the St. Lawrence Seaway. To make the datum accessible, permanent markers are established throughout the region. These markers, called benchmarks, have known elevations. If the...
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Related Experiment Video

Updated: Jun 22, 2026

Micro-drive Array for Chronic in vivo Recording: Drive Fabrication
14:03

Micro-drive Array for Chronic in vivo Recording: Drive Fabrication

Published on: April 20, 2009

Modeling and realization of a multilevel read-only disk.

Jie Song, Yi Ni, Duanyi Xu

    Optics Express
    |June 9, 2009
    PubMed
    Summary

    A new model simulates photoresist development for optical disks, achieving high accuracy. This enables the creation of advanced multilevel optical disks with increased data storage capacity.

    Area of Science:

    • Optical Engineering
    • Materials Science
    • Physics

    Background:

    • Photoresist exposure and development are critical processes in optical disk mastering.
    • Accurate modeling is needed to optimize recording density and multilevel capabilities.

    Purpose of the Study:

    • To develop a physics- and chemistry-based model for photoresist mastering.
    • To simulate micropattern formation and assess its impact on optical disk performance.
    • To explore the feasibility of creating multilevel optical disks.

    Main Methods:

    • A computational model was developed based on the reaction mechanisms of physics and resist chemistry.
    • Micropatterns of recording marks on a stamper were calculated using the model.
    • Laser power modulation was used to vary recording mark widths during exposure simulations.

    More Related Videos

    Hybrid Microdrive System with Recoverable Opto-Silicon Probe and Tetrode for Dual-Site High Density Recording in Freely Moving Mice
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    Hybrid Microdrive System with Recoverable Opto-Silicon Probe and Tetrode for Dual-Site High Density Recording in Freely Moving Mice

    Published on: August 10, 2019

    Quasi-light Storage for Optical Data Packets
    07:45

    Quasi-light Storage for Optical Data Packets

    Published on: February 6, 2014

    Related Experiment Videos

    Last Updated: Jun 22, 2026

    Micro-drive Array for Chronic in vivo Recording: Drive Fabrication
    14:03

    Micro-drive Array for Chronic in vivo Recording: Drive Fabrication

    Published on: April 20, 2009

    Hybrid Microdrive System with Recoverable Opto-Silicon Probe and Tetrode for Dual-Site High Density Recording in Freely Moving Mice
    08:57

    Hybrid Microdrive System with Recoverable Opto-Silicon Probe and Tetrode for Dual-Site High Density Recording in Freely Moving Mice

    Published on: August 10, 2019

    Quasi-light Storage for Optical Data Packets
    07:45

    Quasi-light Storage for Optical Data Packets

    Published on: February 6, 2014

    Main Results:

    • The simulation model demonstrated a pit width deviation of less than 8% compared to experimental results.
    • Modulating laser power successfully controlled recording mark width, enabling multilevel signal generation.
    • Experimental validation confirmed the realization of an 8-level read-only optical disk.

    Conclusions:

    • The developed mastering model accurately predicts photoresist behavior during optical disk fabrication.
    • The model facilitates the design of novel multilevel (ML) optical disks.
    • Integration with existing technologies can significantly enhance recording density on ML disks.