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Ellipse-offset approach and inclined zig-zag method for multi-axis roughing of ruled surface pockets

Yuan-Shin Lee, Bahattin Koc
1998 Computer-Aided Design  
An inclined zig-zag method is proposed for rough cutting the core material region, and an ellipse-offset method is developed for semi-roughing the residual material regions of ruled surface pockets.  ...  This paper presents a new method for 5-axis rough cutting of ruled surface pockets.  ...  The authors would like to thank Professor Ajay Joneja for his helpful discussion.  ... 
doi:10.1016/s0010-4485(98)00051-7 fatcat:yihr3axbanb7zj4meswz5iom2q

Automated generation of NC part programs for excimer laser ablation micromachining from known 3D surfaces

Emir Mutapcic, Pio G. Iovenitti, Jason P. Hayes, Erol C. Harvey, Derek Abbott, Vijay K. Varadan
2002 Smart Structures, Devices, and Systems  
Fabrication of a 3D structure and surface texture using excimer laser mask projection ablation processes typically requires the machine operator to develop a specific NC part program for the desired structure  ...  geometry, and also incorporate appropriate machine parameters to achieve the desired surface finish.  ...  (b) An example of mask layout and toolpath produced by Zig-Zag algorithm.  ... 
doi:10.1117/12.469075 fatcat:v3ewohq5rrgahhreo5l5ysrd4u

Structures and Deformation in Glaciers and Ice Sheets

Stephen J. A. Jennings, Michael J. Hambrey
2021 Reviews of Geophysics  
Hence, to aid the reader in the field, many of the described structures and their cross-cutting relationships are illustrated in photographs, maps, and conceptual diagrams, with examples ranging from the  ...  Variations in surface roughness were considered to be the reason for this result.  ...  In addition, other fold styles such as "parallel" (with fold hinge and limbs of a uniform thickness), "chevron" (zig-zag shaped), and "intrafolial" (isolated fold hinges severed from fold limbs) folds  ... 
doi:10.1029/2021rg000743 fatcat:bcvjsuidovfxplv5t7uoxmp6nq

Atomic structure of low dimensional materials and their in-situ transformation in the transmission electron microscope

Ursula Ludacka
2019 unpublished
Transmission electron microscopy is a powerful method for investigating the atomic structure of thin specimens, and especially two-dimensional materials, such as graphene, hexagonal boron nitride (hBN)  ...  For investigating and quantifying the amount of intercalated potassium within carbon nano-onions, different TEM techniques were applied, including Z-contrast STEM imaging with atomic resolution and electron  ...  Uneven orders of Bragg reexes contain diraction information of lattice planes in zig-zag direction.  ... 
doi:10.25365/thesis.60973 fatcat:lwdro5wcqfeylehuv4hobpkt4q

Deformation Processing of Lead‐Free Duplex Brass

MICHAEL KIERAN MORIARTY
2020
It is inclusive of studies on phase equilibria, hot workability, machinability and corrosion resistance.  ...  It has the best known combination of processing characteristics, strength and corrosion resistance. In 2014, Pb was legislated to a maximum of 0.25% in plumbing products in the US.  ...  At both 550 o C and 600 o C, there are significant amounts of jagged or 'zig-zag' fracture occurring, and this indicates two issues; first, a lack of BCC β phase in the microstructure and second, the β  ... 
doi:10.26180/5efeb982851a3 fatcat:x4iaikinnnfsrfmfwrgpldmlwm

Questions of Trace: Presence, Politics, and Virtual Necromancy in Canadian Literary Archives [article]

Jordan Bolay, University Of Calgary, Aritha Van Herk
2019
Questions of Trace: Presence, Politics, and Virtual Necromancy in Canadian Literary Archives excavates the documents, both archival and published, of politically-inclined works by Guy Vanderhaeghe, Katherine  ...  My project employs a creative, conceptual, practice-based, and meta-cognitive approach to research that re-collects authors' texts and characters, but also interpretations thereof, blurring the boundaries  ...  James stands on the mauve and white carpet of the motel with a helpless grin on his face. Natalie tries to smile, sheepishly she hopes, and pulls him in for a hug.  ... 
doi:10.11575/prism/36798 fatcat:rwfcbwdyirfkffdyuyyhqnfrru