Results 231 to 240 of about 255,519 (292)
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Applied Mathematics and Computation, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yıldırım, Yasemin, Ata, Erhan
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zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yıldırım, Yasemin, Ata, Erhan
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Proceedings of the Institution of Mechanical Engineers, 1951
The paper describes the various commercial methods of producing screw threads by cutting, rolling, grinding, and milling. The operating principles on which the several processes depend are dealt with and their advantages and limitations are discussed. A workshop method of determining the torque required for tapping and for threading is described, and
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The paper describes the various commercial methods of producing screw threads by cutting, rolling, grinding, and milling. The operating principles on which the several processes depend are dealt with and their advantages and limitations are discussed. A workshop method of determining the torque required for tapping and for threading is described, and
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Analytica Chimica Acta, 2019
For the first time, a rapid, efficient, simple, and inexpensive approach for solid phase microextraction on a screw (MES) was developed. MES is a miniaturized form of solid-phase extraction without any backpressure. In this system, analytes were adsorbed on the surface of micro channels of a screw that was coated by polypyrrole (PPy).
Mahmoud Tabibpour +2 more
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For the first time, a rapid, efficient, simple, and inexpensive approach for solid phase microextraction on a screw (MES) was developed. MES is a miniaturized form of solid-phase extraction without any backpressure. In this system, analytes were adsorbed on the surface of micro channels of a screw that was coated by polypyrrole (PPy).
Mahmoud Tabibpour +2 more
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Capture of the screw during percutaneous screw insertion
Injury, 2004The simple technique to maintain the engagement of the screw and the screw driver during percutaneous locking screw insertion is presented. The method can capture the screw when the screw becomes disengaged. This will be helpful when percutaneous screw insertion is performed in the narrow and deep location of the bone such as a locking screw at the ...
Banchong, Mahaisavariya +2 more
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The Journal of Hand Surgery, 2006
To assess the biomechanical stability relative to screw length and K-wire augmentation in scaphoid fracture fixation using a flexibility testing protocol and cadaver scaphoids whose soft tissue attachments remained undisturbed. Our hypothesis was 2-fold: increasing screw length and augmenting fixation with a K-wire would improve fracture fragment ...
Seth D, Dodds +2 more
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To assess the biomechanical stability relative to screw length and K-wire augmentation in scaphoid fracture fixation using a flexibility testing protocol and cadaver scaphoids whose soft tissue attachments remained undisturbed. Our hypothesis was 2-fold: increasing screw length and augmenting fixation with a K-wire would improve fracture fragment ...
Seth D, Dodds +2 more
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Cannulated screws for odontoid screw fixation and atlantoaxial transarticular screw fixation
Journal of Neurosurgery, 1995✓ Cannulated screw systems use thin Kirschner wires (K-wires) that have been drilled into the bone to direct screw trajectories accurately into small bone fragments. Use of the K-wires avoids overdrilling the pilot holes and allows fixation of adjacent bone fragments during screw insertion. Hollow tools and hollow screws are inserted into the bone over
C A, Dickman +3 more
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The Mathematical Gazette, 1957
A helicoid is the surface generated by a curve which is simultane rotated about a fixed axis and translated in the direction of the axis w velocity proportional to the angular velocity of rotation.[1] An Archime Screw [2] is strictly a finite helicoid in which the generating curve is c (and ...
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A helicoid is the surface generated by a curve which is simultane rotated about a fixed axis and translated in the direction of the axis w velocity proportional to the angular velocity of rotation.[1] An Archime Screw [2] is strictly a finite helicoid in which the generating curve is c (and ...
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On Displacing a Screw about a Screw
2002We derive, using compact vector methods which do not rely on Kotel’nikov’s principle, the dualised “Rodrigues formula” which is a well-established expression for the screw that has suffered a screw displacement from a known initial location. An alternative perception — that the screw has suffered rigid-body rotation through a dual angle — is examined ...
I. A. Parkin, J. E. Baker
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