In this paper we present a case study of collaborative diagram drawing involving 36 students in Computer Science. Their task was to collaboratively draw a Use Case Diagram about the scenarios provided at the begin of the experiment. As students of a Software Engineering course, they had a general knowledge of such type of diagrams and related terminology, but they were not experts and had not r...

a new method for increasing ldr in deep drawing is application of anti-lock braking system (abs) on blank holder. in this method, instead of applying a constant force on blank and control the metal flow, the abs system holds and releases the blank several times (20 to 50 times) which results increasing ldr. this study investigates the effect of different parameters of abs on improving the condi...

There are mainly two categories for a 3D reconstruction from 2D drawings: B-Rep and CSG that both these methods have serious weaknesses despite being useful. B-Rep method which has been older and have wider function range is problematic because of high volume of calculations and vagueness in answers and CSG method has problem in terms of very limited range of volumes and drawings that it can an...

Computer Aided Design (CAD) applications usually need to store and process dynamically and efficiently various drawing elements. Typically the quad-tree data structure is used in 2 dimensions and the octant-tree data structure in 3 dimensions. Here the Binary Spatial Partitioning (BSP) tree data structure is proposed for CAD applications. BSP scales better in irregular geometries such as long n...

eichelbe@i n f o r m a t i k . u n i w u e r z b u r g . d e Abstract. UML class diagrams, internationally specified and widely used in software engineering, are a great challenge in automatic drawing of graphs. Due to the complex nature of UML class diagrams and the requirements of software engineers, who need to read these diagrams, layout rules and algorithms for general graphs can not be ap...

Hierarchical graphs are graphs with layering structures; clustered graphs are graphs with recursive clustering structures. Both have applications in VLSI design, CASE tools, software visualisation and visualisation of social networks and biological networks. Straight-line drawing algorithms for hierarchical graphs and clustered graphs have been presented in [P. Eades, Q. Feng, X. Lin and H. Nag...