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A screw axis (helical axis or twist axis) is a line that is simultaneously the axis of rotation and the line along which translation of a body occurs...

torsion about its helical axis. The material of the spring is thereby subjected to a bending moment, either reducing or increasing the helical radius. In this...

The Gorlov helical turbine (GHT) is a water turbine evolved from the Darrieus turbine design by altering it to have helical blades/foils. Water turbines...

A helical antenna is an antenna consisting of one or more conducting wires wound in the form of a helix. A helical antenna made of one helical wire, the...

to a fixed axis. Helices are important in biology, as the DNA molecule is formed as two intertwined helices, and many proteins have helical substructures...

helical curve for a given conformation. A-DNA and Z-DNA differ significantly in their geometry and dimensions to B-DNA, although still form helical structures...

visualizing the alpha-helical secondary structure of oligopeptide sequences are (1) a helical wheel, (2) a wenxiang diagram, and (3) a helical net. Each of these...

the possible double helical structures which DNA can adopt. A-DNA is thought to be one of three biologically active double helical structures along with...

Edmundson AB (1967). "Use of helical wheels to represent the structures of proteins and to identify segments with helical potential". Biophysical Journal...

addressed the torque ripple by sweeping the blades helically (Gorlov type). Savonius vertical-axis wind turbines (VAWT) are not widespread, but their...

magnetic helical nanorobots take advantage of magnetic actuation, but they also take advantage of helical propulsion methods. In short, magnetic helical nanorobots...

has a helical, propeller, or screw-shaped geometry is called helicity or helical chirality. The screw axis or the Dn, or Cn principle symmetry axis is considered...

n-fold helical symmetry: If the requirement that every cross section of the helical object be identical is relaxed, then additional lesser helical symmetries...

lowest-order reflection is allowed if the light is incident along the helical axis, whereas for oblique incidence higher-order reflections become permitted...

The Helical engine is a proposed spacecraft propulsion drive that, like other reactionless drives, would violate the laws of physics. The concept was...

single helical gears by using a double set of teeth, slanted in opposite directions. A double helical gear can be thought of as two mirrored helical gears...

M=F\cdot r} can be transmitted around an axis via the force F {\displaystyle F} directed along this helical axis and the lever arm to the system center...

The Helically Symmetric Experiment (HSX) at the University of Wisconsin-Madison is such a quasi-helically symmetric stellarator (helical axis of symmetry)...

standard practice. A crossed helical gear is a gear that operate on non-intersecting, non-parallel axes. The term crossed helical gears has superseded the...

crossing across the centre of the helical axis. The superbead model was proposed by Renz in 1977. This structure is not helical like the other models, it instead...