A three dimensional wire frame graphics system

Author(s):  
Uday G. Gujar
Keyword(s):  
NANO ◽  
2013 ◽  
Vol 08 (04) ◽  
pp. 1350045 ◽  
Author(s):  
AHMAD ALLAHBAKHSH ◽  
FARHAD SHARIF ◽  
SAEEDEH MAZINANI

The effects of oxygen-containing functional groups on the surface roughness of graphene oxide are thoroughly studied using three-dimensional atomic force microscopy images, ball-and-stick model and wire-frame view results. Moreover, X-ray diffraction method and Fourier transform infrared spectroscopy are employed for characterizing the structural and chemical behavior of graphene oxide, respectively. Graphene oxide sheets show a clear concavity on one side when the aggregation of functional groups increased on the other side. This behavior could be the main reason for the surface fluctuation of graphene oxide sheets that is observed in microscopic images. In addition, the individual graphene oxide sheet presents greater values of mean roughness compared to multilayered sheets.


1998 ◽  
Vol 35 (3) ◽  
pp. 227-232 ◽  
Author(s):  
Katsuaki Mishima ◽  
Toshio Sugahara ◽  
Yoshihide Mori ◽  
Katsuhiro Minami ◽  
Masayoshi Sakuda

Objective To align the protruding premaxilla in infants with bilateral cleft lip and palate (BCLP), an intraoral appliance (i.e., Hotz plate) and an extraoral appliance consisting of a band covering the head and elastics are used as a presurgical orthopedic treatment in our clinic. The aim of this study was to analyze the configuration and position of the premaxilla and the vomer in infants with BCLP and to investigate the factors generating deviation and bending of the vomer and twisting of the premaxilla. Patients Palatal casts were obtained serially from 10 infants with complete BCLP from 1 to 3 months of age. Measurements These casts were automatically measured using a highly accurate contact-type measuring apparatus. After three-dimensional wire frame models generated from the serial casts were automatically superimposed, the magnitude and direction of the shift were calculated. A discriminant analysis was used for investigation of predictor variables generating the twisting or bending vomer. Results and Conclusions The vomer was found to be bent in two infants and the premaxilla was twisted in three infants. In the infants whose vomers were bent, the magnitude of the posterior shift of the premaxilla was greater than that of the inferior shift. A discriminant analysis indicated that at 1 month of age, a greater inclination and a smaller deviation of the vomer and a longer distance between the cleft edges of the lateral segments had a tendency to be associated with bending of the vomer or twisting of the premaxilla.


1990 ◽  
Author(s):  
Robert L. Galloway, Jr. ◽  
Charles A. Edwards II ◽  
Gerald L. Haden ◽  
Robert J. Maciunas

1987 ◽  
Vol 17 (4) ◽  
pp. 1-6
Author(s):  
Uday G. Gujar
Keyword(s):  

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Jungil Jun ◽  
Youngshil Ryoo ◽  
Kuengmi Choi ◽  
Sunmi Park

AbstractPopulation aging is a global phenomenon, and the elderly population has a higher economic capability today than that in the past. Thus, this population is considered to be a growing consumer group that enjoys both consumer and leisure life. In this study, we developed prototype hat patterns for elderly women that can be used for developing close-fitting hats, helmets, masks, and smart headwear. Three-dimensional (3D) head scan data of elderly women were employed herein, and the data were classified into three groups with common head size and head shape. The target group was selected from a high-frequency group among the classified groups, and a standard head form representing the target group was developed using averaging and wire frame generation techniques. Four hat types were considered, design baselines were developed for each type, and prototype patterns were designed for each hat type using a flattening technique. The suitability of the developed prototype hat patterns was subsequently verified. Our results showed that all four prototype patterns had errors less than 5 mm2 (1.40%). The hat patterning method proposed in this study is expected to improve the wearing comfort of high-value-added products designed for the elderly.


Robotica ◽  
1994 ◽  
Vol 12 (1) ◽  
pp. 65-75 ◽  
Author(s):  
J. M. Badcock ◽  
R. A. Jarvist

Methods are described for computer analysis of image-data from a coded-stripe rangefinder. The main objective is to find vertex coordinates and connectivity information for a polyhedral object, enabling it to be represented by a wire-frame model. For each of several rangefinder viewpoints, the data is processed to extract three-dimensional edge and vertex positions. The emphasis is on estimation techniques that make good use of fairly sparse data-points. Results from different viewpoints are merged to produce a 3D model of the object.


1991 ◽  
Vol 2 (3) ◽  
pp. 247-261 ◽  
Author(s):  
Robert Reich ◽  
John B. Ochs ◽  
Tulga M. Ozsoy

1990 ◽  
Vol 23 (9) ◽  
pp. 999-1010 ◽  
Author(s):  
Jayanta Mukherjee ◽  
P.P. Das ◽  
B.N. Chatterji

2007 ◽  
Vol 119 (1) ◽  
pp. 440-442 ◽  
Author(s):  
Rei Ogawa ◽  
Shinpo Aoki ◽  
Masayo Aoki ◽  
Koichiro Oki ◽  
Hiko Hyakusoku

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