BUILD-IT: An intuitive design tool based on direct object manipulation

1998 ◽  
pp. 297-308 ◽  
Author(s):  
Morten Fjeld ◽  
Martin Bichsel ◽  
Matthias Rauterberg
Keyword(s):  
Object Manipulation ◽  
Design Tool ◽  
Direct Object ◽  
Intuitive Design

Trailblazing: Video Playback Control by Direct Object Manipulation

2007 ◽  
Author(s):  
Don Kimber ◽  
Tony Dunnigan ◽  
Andreas Girgensohn ◽  
Frank Shipman ◽  
Thea Turner ◽  
...  
Keyword(s):  
Object Manipulation ◽  
Direct Object ◽  
Video Playback

scholarly journals Trade-Off between Task Accuracy, Task Completion Time and Naturalness for Direct Object Manipulation in Virtual Reality

2022 ◽  
Vol 6 (1) ◽  
pp. 6
Author(s):  
Jari Kangas ◽  
Sriram Kishore Kumar ◽  
Helena Mehtonen ◽  
Jorma Järnstedt ◽  
Roope Raisamo
Keyword(s):  
Virtual Reality ◽  
Completion Time ◽  
Object Manipulation ◽  
Direct Object ◽  
Task Completion ◽  
Interaction Techniques ◽  
Interaction Technique ◽  
Trade Off ◽  
Task Completion Time ◽  
Task Accuracy

Virtual reality devices are used for several application domains, such as medicine, entertainment, marketing and training. A handheld controller is the common interaction method for direct object manipulation in virtual reality environments. Using hands would be a straightforward way to directly manipulate objects in the virtual environment if hand-tracking technology were reliable enough. In recent comparison studies, hand-based systems compared unfavorably against the handheld controllers in task completion times and accuracy. In our controlled study, we compare these two interaction techniques with a new hybrid interaction technique which combines the controller tracking with hand gestures for a rigid object manipulation task. The results demonstrate that the hybrid interaction technique is the most preferred because it is intuitive, easy to use, fast, reliable and it provides haptic feedback resembling the real-world object grab. This suggests that there is a trade-off between naturalness, task accuracy and task completion time when using these direct manipulation interaction techniques, and participants prefer to use interaction techniques that provide a balance between these three factors.

scholarly journals A Proposal of an Intuitive Design Tool Based on Global Space Deformation.

2003 ◽  
Vol 69 (4) ◽  
pp. 559-563
Author(s):  
Norimasa YOSHIDA ◽  
Ken-ichiro NOTAKE ◽  
Katsuhiro KITAJIMA
Keyword(s):  
Design Tool ◽  
Global Space ◽  
Space Deformation ◽  
Intuitive Design

Object Manipulation and Creative Behavior

1973 ◽  
Author(s):  
J. Barsaloux ◽  
T. J. Bouchard ◽  
S. Bush
Keyword(s):  
Object Manipulation ◽  
Creative Behavior

Object Manipulation in Non-Human Animals

2012 ◽  
Author(s):  
Daniel J. Weiss ◽  
Kate Chapman
Keyword(s):  
Object Manipulation

Flexural design of precast, prestressed ultra-high-performance concrete members

PCI Journal ◽  
2020 ◽  
Vol 65 (6) ◽  
pp. 35-61
Author(s):  
Chungwook Sim ◽  
Maher Tadros ◽  
David Gee ◽  
Micheal Asaad
Keyword(s):  
Prestressed Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
Limit State ◽  
Design Guidelines ◽  
Design Tool ◽  
Supplementary Cementitious Materials ◽  
Ultra High Performance Concrete ◽  
Concrete Members ◽  
Cylinder Strength

Ultra-high-performance concrete (UHPC) is a special concrete mixture with outstanding mechanical and durability characteristics. It is a mixture of portland cement, supplementary cementitious materials, sand, and high-strength, high-aspect-ratio microfibers. In this paper, the authors propose flexural design guidelines for precast, prestressed concrete members made with concrete mixtures developed by precasters to meet minimum specific characteristics qualifying it to be called PCI-UHPC. Minimum specified cylinder strength is 10 ksi (69 MPa) at prestress release and 18 ksi (124 MPa) at the time the member is placed in service, typically 28 days. Minimum flexural cracking and tensile strengths of 1.5 and 2 ksi (10 and 14 MPa), respectively, according to ASTM C1609 testing specifications are required. In addition, strain-hardening and ductility requirements are specified. Tensile properties are shown to be more important for structural optimization than cylinder strength. Both building and bridge products are considered because the paper is focused on capacity rather than demand. Both service limit state and strength limit state are covered. When the contribution of fibers to capacity should be included and when they may be ignored is shown. It is further shown that the traditional equivalent rectangular stress block in compression can still be used to produce satisfactory results in prestressed concrete members. A spreadsheet workbook is offered online as a design tool. It is valid for multilayers of concrete of different strengths, rows of reinforcing bars of different grades, and prestressing strands. It produces moment-curvature diagrams and flexural capacity at ultimate strain. A fully worked-out example of a 250 ft (76.2 m) span decked I-beam of optimized shape is given.

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