Merging 3D Cortical Sulci models with 3D Representations of MEG Data

NeuroImage ◽  
1998 ◽  
Vol 7 (4) ◽  
pp. S796
Author(s):  
C. Barillot ◽  
D. Schwartz ◽  
G. Le Goualher ◽  
X. Morandi ◽  
B. Gibaud
Keyword(s):  
3D Representations

scholarly journals Virtual Loom: a tool for the interactive 3D representation of historical fabrics

2021 ◽  
Author(s):  
Cristina Portalés ◽  
Manolo Pérez ◽  
Pablo Casanova-Salas ◽  
Jesús Gimeno
Keyword(s):  
Art History ◽  
3D Modelling ◽  
Current Version ◽  
Close Collaboration ◽  
Design And Implementation ◽  
Different Types ◽  
Interactive 3D ◽  
Silk Fabrics ◽  
Definition Of ◽  
3D Representations

Abstract3D modelling of man-made objects is widely used in the cultural heritage sector, among others. It is relevant for its documentation, dissemination and preservation. Related to historical fabrics, weaves and weaving techniques are still mostly represented in forms of 2D graphics and textual descriptions. However, complex geometries are difficult to represent in such forms, hindering the way this legacy is transmitted to new generations. In this paper, we present the design and implementation of SILKNOW’s Virtual Loom, an interactive tool aimed to document, preserve and represent in interactive 3D forms historical weaves and weaving techniques of silk fabrics, dating from the 15th to the 19th centuries. To that end, our tool only requires an image of a historical fabric. Departing from this image, the tool automatically subtracts the design, and allows the user to apply different weaves and weaving techniques. In its current version, the tool embeds five traditional weaving techniques, 39 weaves and six types of yarns, which have been defined thanks to close collaboration of experts in computer graphics, art history and historical fabrics. Additionally, users can change the color of yarns and produce different 3D representations for a given fabric, which are interactive in real time. In this paper, we bring the details of the design and implementation of this tool, focusing on the input data, the strategy to process images, the 3D modelling of yarns, the definition of weaves and weaving techniques and the graphical user interface. In the results section, we show some examples of image analysis in order to subtract the design of historical fabrics, and then we provide 3D representations for all the considered weaving techniques, combining different types of yarns.

scholarly journals Implementation of Augmented Reality in a Mechanical Engineering Training Context

Computers ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 163
Author(s):  
Dominique Scaravetti ◽  
Rémy François
Keyword(s):  
Higher Education ◽  
Augmented Reality ◽  
Industrial Revolution ◽  
Power Transmission ◽  
Digital Tools ◽  
Training Context ◽  
Global Industry ◽  
Fourth Industrial Revolution ◽  
Engineering Training ◽  
3D Representations

Global industry is at the heart of its fourth industrial revolution, being driven by the emergence of new digital solutions: Augmented reality allows us to consider the evolution towards the “the augmented operator”. This technology is currently little used in higher education, especially for mechanical engineers. We believe that it can facilitate learning and develop autonomy. The objective of this work is to assess the relevance of augmented reality in this context, as well as its impact on learning. The difficulties for a student approaching a technical system are related to reading and understanding 2D and even 3D representations, lack of knowledge on components functions, and the analysis of the chain of power transmission and transformation of movement. The research is intended to see if AR technologies are relevant to answer these issues and help beginners get started. To that end, several AR scenarios have been developed on different mechanical systems, using the relevant features of the AR interfaces that we have identified. Otherwise, these experiences have enabled us to identify specific issues linked to the implementation of AR. Our choice of AR devices and software allows us to have an integrated digital chain with digital tools and files used by mechanical engineers. Finally, we sought to assess how this technology made it possible to overcome the difficulties of learners, in different learning situations.

Survey of Students' Perception and the Influence of Learning Style Preferences on Learner's Intention to Use 3D Visualization Instruction

2016 ◽  
pp. 297-316
Author(s):  
Yu-Hsin Hung ◽  
Ray I. Chang ◽  
Chun Fu Lin
Keyword(s):  
Learning Styles ◽  
Learning Style ◽  
Undergraduate Students ◽  
Teaching And Learning ◽  
3D Visualization ◽  
Intention To Use ◽  
Learning Style Preferences ◽  
Computer Science Pedagogy ◽  
Style Preferences ◽  
3D Representations

3D visualization specifically has been widely applied in a broad range of fields, including computer science, pedagogy, and so forth. 3D visualization instruction has become the essential tool that uses computer programs to generate 3D representations of manmade objects. For users, 3D visualization instruction can be manipulated, altered and efficiently communicated to others, and it is efficient for teaching and learning. The aim of this study is investigating students' perception toward 3D visualization instruction, and the influence of learning-style preferences on learners' intentions to use 3D visualization instruction. We are trying to develop the experiment which undergraduate students participated in this study, the purpose of which was to investigate the utilize 3D visualization instruction access to the single learning style and multiple learning styles. Data mining technology was employed in this study to identify multiple learning styles. The result showed that high visual and high sensing learning style has potential of using 3D visualization instruction.

Computer-Generated 3D Representations of the Aorta: a New Tool in the Management of Aortic Aneurysm Patients

1994 ◽  
Vol 42 (01) ◽  
pp. 25-28 ◽  
Author(s):  
O. Dapunt ◽  
R. de Asla ◽  
E. Griepp ◽  
P. Midulla ◽  
R. Griepp
Keyword(s):  
Aortic Aneurysm ◽  
3D Representations

scholarly journals Inactivation of yeast hexokinase by Cibacron Blue 3G-A: spectral, kinetic and structural investigations

1994 ◽  
Vol 300 (1) ◽  
pp. 91-97 ◽  
Author(s):  
R N Puri ◽  
R Roskoski
Keyword(s):  
Active Site ◽  
Pyridoxal Phosphate ◽  
Difference Spectrum ◽  
Size Exclusion ◽  
Blue Dye ◽  
Irreversible Inhibitor ◽  
Reactive Blue 2 ◽  
Cibacron Blue ◽  
Yeast Hexokinase ◽  
3D Representations

Yeast hexokinase, a homodimer (100 kDa), is an important enzyme in the glycolytic pathway. Although Cibacron Blue 3G-A (Reactive Blue 2) has been previously shown to inactivate yeast hexokinase, no comprehensive study exists concerning the nature of interaction(s) between hexokinase and the blue dye. A comparison of the computer-generated three-dimensional (3D) representations showed considerable overlap of the purine ring of ATP, a nucleotide substrate of hexokinase, with the hydrophobic anthraquinone moiety of the blue dye. The visible spectrum of the blue dye showed a characteristic absorption band centred at 628 nm. The visible difference spectrum of increasing concentration of the dye and the same concentrations of the dye plus a fixed concentration of hexokinase exhibited a maximum, a minimum and an isobestic point at 683, 585, and 655 nm respectively. The visible difference spectrum of the blue dye and the dye in 50% ethylene glycol showed a maximum and a minimum at 660 and 570 nm respectively. The visible difference spectrum of the blue dye in the presence of the dye and hexokinase modified at the active site by pyridoxal phosphate, iodoacetamide and o-phthalaldehyde was devoid of bands characteristic of the hexokinase-blue dye complex. Size-exclusion-chromatographic studies in the absence or presence of guanidinium chloride showed that the enzyme inactivated by the blue dye was co-eluted with the unmodified enzyme. The dialysis residue obtained after extensive dialysis of the gel-filtered complex, against a buffer of high ionic strength, showed an absorption maximum at 655 nm characteristic of the dye-enzyme complex. Inactivation data when analysed by ‘Kitz-Wilson’-type kinetics for an irreversible inhibitor, yielded values of 0.05 min-1 and 92 microM for maximum rate of inactivation (k3) and dissociation constant (Kd) for the enzyme-dye complex respectively. Sugar and nucleotide substrates protected hexokinase against inactivation by the blue dye. About 2 mol of the blue dye bound per mol of hexokinase after complete inactivation. The inactivated enzyme could not be re-activated in the presence of 1 M NaCl. These results suggest that Cibacron Blue 3G-A inactivated hexokinase by an irreversible adduct formation at or near the active-site. Spectral and kinetic studies coupled with an analysis of the 3D representations of model compounds corresponding to the substructures of the blue dye suggest that 1-amino-4-(N-phenylamino)anthraquinone-2-sulphonic acid part of the blue dye may represent the minimum structure of Cibacron Blue 3G-A necessary to bind hexokinase.(ABSTRACT TRUNCATED AT 400 WORDS)

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