An exact interactive time visibility ordering algorithm for polyhedral cell complexes

1998 ◽  
Author(s):  
Cláudio T. Silva ◽  
Joseph S. B. Mitchell ◽  
Peter L. Williams
Keyword(s):  
Cell Complexes ◽  
Visibility Ordering

Polygon visibility ordering via Voronoi diagrams

2007 ◽  
Vol 23 (7) ◽  
pp. 503-511 ◽  
Author(s):  
Shinichi Fukushige ◽  
Hiromasa Suzuki
Keyword(s):  
Voronoi Diagrams ◽  
Visibility Ordering

scholarly journals Bott characteristics of cell complexes

1983 ◽  
Vol 86 (4) ◽  
pp. 493-499
Author(s):  
Jack Weinstein
Keyword(s):  
Cell Complexes

scholarly journals Frizzled3 controls axonal development in distinct populations of cranial and spinal motor neurons

eLife ◽  
2013 ◽  
Vol 2 ◽  
Author(s):  
Zhong L Hua ◽  
Philip M Smallwood ◽  
Jeremy Nathans
Keyword(s):  
Cell Death ◽  
Motor Neurons ◽  
Planar Cell Polarity ◽  
Motor Nerve ◽  
Normal Wave ◽  
Axon Growth ◽  
Axonal Growth ◽  
Cell Complexes ◽  
Developing Neurons

Disruption of the Frizzled3 (Fz3) gene leads to defects in axonal growth in the VIIth and XIIth cranial motor nerves, the phrenic nerve, and the dorsal motor nerve in fore- and hindlimbs. In Fz3−/− limbs, dorsal axons stall at a precise location in the nerve plexus, and, in contrast to the phenotypes of several other axon path-finding mutants, Fz3−/− dorsal axons do not reroute to other trajectories. Affected motor neurons undergo cell death 2 days prior to the normal wave of developmental cell death that coincides with innervation of muscle targets, providing in vivo evidence for the idea that developing neurons with long-range axons are programmed to die unless their axons arrive at intermediate targets on schedule. These experiments implicate planar cell polarity (PCP) signaling in motor axon growth and they highlight the question of how PCP proteins, which form cell–cell complexes in epithelia, function in the dynamic context of axonal growth.

Validation of macroscopic maturity stages of the Patagonian red octopus Enteroctopus megalocyathus

2012 ◽  
Vol 93 (3) ◽  
pp. 833-842 ◽  
Author(s):  
Nicolas Ortiz
Keyword(s):  
Sexual Maturation ◽  
Reproductive System ◽  
Seminiferous Tubule ◽  
Atlantic Coast ◽  
Microscopic Level ◽  
Maturity Index ◽  
Follicular Cell ◽  
Seminiferous Tubules ◽  
Cell Complexes ◽  
Maturation Stages

Testes and ovaries of Enteroctopus megalocyathus collected along the Patagonian Atlantic coast were analysed histologically to validate the macroscopic maturity scales adopted for this species. Changes through the course of development of the seminiferous tubules and of the oocyte/follicular cell complexes were characterized and these were classified into five and six microscopic categories of development respectively. A histological maturity index, based on the frequencies of microscopic categories, was used to assess the correspondence between macroscopic maturation stages and the microscopic level of development of the gonadal tissue. Seminiferous tubules showed a regular and progressive pattern of microscopic development within each macroscopic stage and between consecutive macroscopic stages. However, a minority of males exhibiting seminiferous tubule with sperm did not display macroscopic characteristics of the mature-spawning stage. In females, an overlapping of microscopic categories was observed in maturing macroscopic stages. Previtellogenic oocytes were not present at mature-spawning or spent stages. Significant changes in the histological maturity index were observed between consecutive macroscopic stages, confirming the validity of macroscopic maturity scales of both sexes. In addition, by considering both macroscopic and microscopic criteria, it was possible to determine the overall state of development and functioning of the reproductive system during sexual maturation of this species.

Object-Space Visibility Ordering for Point-Based and Volume Rendering

2008 ◽  
Vol 27 (1) ◽  
pp. 91-101
Author(s):  
C. Hofsetz ◽  
N. Max ◽  
R. Bastos
Keyword(s):  
Volume Rendering ◽  
Object Space ◽  
Visibility Ordering
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