Perpendicular Offsets
Perpendicular Offsets - Related Videos
01:16
Perpendicular-Axis Theorem
0 Views •
2025
The perpendicular-axis theorem states that the moment of inertia of a planar object about an axis perpendicular to its plane is equal to the sum of the moments of inertia about two mutually perpendicular concurrent axes lying in the plane of the body. Consider a circular disc of mass M and radius R lying along an x-y plane. The origin lies at the center of the disc, and the z-axis is perpendicular to the disc's plane. All three axes coincide at the disc's center. The moment of inertia of this...
11:23
Polydimethylsiloxane-polycarbonate Microfluidic Devices for Cell Migration Studies Under Perpendicular Chemical and Oxygen Gradients
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Cited by 13 •
2017
The control of chemical and oxygen gradients is essential for cell cultures. This paper reports a polydimethylsiloxane-polycarbonate (PDMS-PC) microfluidic device capable of reliably generating combinations of chemical and oxygen gradients for cell migration studies, which can be practically utilized in biological labs without sophisticated instrumentation.
07:14
Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
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Cited by 5 •
2018
Here we present a Ground Penetrating Radar (GPR) system based on a ground-coupled, densely populated antenna array for monitoring the dynamic process of subsurface water infiltration. A time-lapse radar image of the infiltration process allowed estimating the depth of the wetting front during the course of the infiltration process.
03:56
Whole-Cell Voltage Clamp Recordings from Drosophila Photoreceptors
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2025
The video demonstrates recording electrical activity in the photoreceptor neurons of Drosophila's ommatidium by establishing a whole-cell configuration. It highlights the activation of transient receptor potential channels by light pulses, resulting in measurable quantum bumps.
09:14
Cardiac Magnetic Resonance Imaging at 7 Tesla
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Cited by 10 •
2019
The sensitivity gain inherent to ultrahigh field magnetic resonance holds promise for high spatial resolution imaging of the heart. Here, we describe a protocol customized for functional cardiovascular magnetic resonance (CMR) at 7 Tesla using an advanced multi-channel radio-frequency coil, magnetic field shimming and a triggering concept.
FAQs
Because the right angle fixes the shortest geometric connection between the chain line and the feature. If that relationship is not maintained, the recorded distance can place the feature incorrectly when details are plotted. Perpendicularity is therefore not merely a convenient field arrangement; it preserves the geometric basis used for accurate plans, alignment checks, and engineering set-out.
Cross-staffs, optical squares, and line rangers provide field means for establishing the required relationship between the chain line and an offset. Their value lies in helping the surveyor identify or maintain the perpendicular direction before measuring the distance. Selecting and using these instruments appropriately supports consistent recording of boundaries, structures, and other nearby features.
Two controls are especially important: the station must be clearly defined on the straight chain line, and the offset direction must remain perpendicular while the distance is measured. A poorly identified station can associate a feature with the wrong location, while careless distance measurement changes its plotted position. These controls directly affect the reliability of the survey record.
Begin by establishing the straight chain line, then identify and mark the station from which the feature will be referenced. Set the offset direction at 90 degrees using an appropriate field instrument, measure the distance to the feature, and record the relationship for plotting. Repeating this organized sequence keeps each site detail tied to a known line position.
Perpendicular offsets are useful when a survey must capture boundaries, structures, or other site features beside a baseline. The resulting measurements support plotting details on a plan, checking whether features remain aligned, and setting out engineering works. They are especially suitable where a clear straight chain line can be established and the nearby features can be referenced from defined stations.
They provide a systematic geometric record of where nearby features lie in relation to the chain line. When stations and distances are recorded carefully, the measurements can be transferred to a plan to represent site layout, compare feature positions for alignment, and guide the setting out of engineering works. Their usefulness depends on preserving the right-angle relationship throughout.