Search results
Results from the WOW.Com Content Network
Stereolithography is a 3D-printing technique that uses photopolymerization to bind substrate that has been laid layer upon layer, creating a polymeric network. As opposed to fused-deposition modeling, where the extruded material hardens immediately to form layers, 4D printing is fundamentally based in stereolithography, where in most cases ultraviolet light is used to cure the layered ...
Methodologically, the learning sciences differs from other fields in educational research. It focuses on the study of learners, their localities, and their communities. The design-based research methodology is often used by learning scientists in their inquiries because this methodological framework considers the subject of study to be a complex system involving emergent properties that arise ...
Cycle of research and development Spending on research and development as share of GDP (2015). Research and development (R&D or R+D) [1], known in some countries as experiment and design, is the set of innovative activities undertaken by corporations or governments in developing new services or products.
In computer science, a 4D vector is a 4-component vector data type. Uses include homogeneous coordinates for 3-dimensional space in computer graphics , and red green blue alpha ( RGBA ) values for bitmap images with a color and alpha channel (as such they are widely used in computer graphics).
4D (software), a complete programming environment including database and web server 4D SAS, developers of 4D and Wakanda; 4D Inc, a US-based subsidiary of 4D SAS; 4D BIM, a term used in computer aided design; 4D printing; Cinema 4D, a commercial cross platform 3D graphics application; SGI IRIS 4D, a line of workstations from Silicon Graphics
This implies that S 3 L × S 3 R is the universal covering group of SO(4) — its unique double cover — and that S 3 L and S 3 R are normal subgroups of SO(4). The identity rotation I and the central inversion −I form a group C 2 of order 2, which is the centre of SO(4) and of both S 3 L and S 3 R. The centre of a group is a normal subgroup ...
The tesseract is one of 6 convex regular 4-polytopes. In mathematics, a regular 4-polytope or regular polychoron is a regular four-dimensional polytope.They are the four-dimensional analogues of the regular polyhedra in three dimensions and the regular polygons in two dimensions.
4D (4th Dimension, or Silver Surfer, as it was known during early development) is a relational database management system and integrated development environment developed by Laurent Ribardière. [3] 4D was created in 1984 [4] and had a slightly delayed public release for Macintosh in 1987 [5] [6] [7] with its own programming language. [1]