Investigation of Hand Motion Language in Shape Conceptualization

2004 ◽  
Vol 4 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Imre Horva´th
Keyword(s):  
Empirical Study ◽  
Conceptual Design ◽  
Shape Design ◽  
Initial Shape ◽  
Consumer Durables ◽  
Hand Motion ◽  
Designed Experiments ◽  
Computer Aided ◽  
Design Systems

This paper summarizes the results of an empirical study concerning the use of hand motions as one of the input mechanisms of a multi-modal interface of computer aided conceptual design systems for initial shape design of consumer durables. A hand motion language (HML) has been developed and used in designed experiments to describe simple, compound and hybrid shapes. The subjects were asked to reconstruct the presented shapes by sketching on paper. Comprehension of the hand motion language has been evaluated in terms of fidelity and efficiency. The results clearly indicate the potentials of a HML in shape conceptualization. In addition, the experiments revealed several new issues related to the application of the hand motion language in a multi-modal interface.

Comprehending a Hand Motion Language in Shape Conceptualization

2003 ◽  
Author(s):  
Imre Horva´th ◽  
Nynke Tromp ◽  
Jaap Daalhuizen
Keyword(s):  
Future Research ◽  
Shape Design ◽  
Initial Shape ◽  
Consumer Durables ◽  
Semantic Level ◽  
Hand Motion ◽  
Designed Experiments ◽  
Computer Aided ◽  
Cad Models ◽  
Design Systems

This paper reports on a study concerning the comprehension of an experimental hand motion language in shape conceptualization. Hand motion is regarded as a prospective input mechanism for computer aided conceptual design systems for initial shape design of consumer durables. Our hand motion language has been developed based on the analysis of the (a) information necessary to describe shape concepts, (b) descriptive and indicative capabilities of human hands, and (c) cognitive and perceptive aspects of processing hand motions. This language was used in designed experiments to describe simple, compound and hybrid shapes for designers and tested with respect to comprehensibility. The subjects were asked to reconstruct the presented shapes by sketching on paper. Comprehension of the hand motion language has been evaluated in terms of fidelity and efficiency. Fidelity was expressed in terms of the number of deviations of the sketches of the test shapes from the existing CAD models. Efficiency was expressed as the proportion of the time needed to understand the test shapes communicated by hand motions and the time needed for the presentation. The results clearly indicate the potentials of a HML in shape conceptualization. In addition, the experiments revealed several new issues related to the application of the hand motion language in a multi-modal interface. The most important one is the need of chunking of the hand motion sequences in a way that enables the computer system to reliably reconstruct shapes and the designers to understand the formation of shapes on a higher semantic level. These issues will be addressed in our future research.

Qualitative and Imprecise Solid Modeling for Conceptual Shape Design

2000 ◽  
Author(s):  
Huilin Shu ◽  
Jihong Liu ◽  
Yifang Zhong
Keyword(s):  
Conceptual Design ◽  
Design Process ◽  
Product Information ◽  
Shape Representation ◽  
Solid Modeling ◽  
Shape Design ◽  
Prototype System ◽  
Imprecise Information ◽  
Primary Activity ◽  
Computer Aided

Abstract The shape design of products is the primary activity of design process. The research on qualitative & imprecise solid modeling for computer-aided conceptual shape design is presented in this paper. At first, the requirements of shape representation for computer-aided conceptual shape design are emphatically discussed. Secondly, in the situation where the product information is deficient, the ideas of qualitative and imprecise solid modeling are presented to deal with qualitative and imprecise information in the phase of conceptual shape design. The aims are mainly to explore the representation and manipulation of product shapes, and to benefit designers to design shapes in the phase of conceptual design. Finally, a prototype system CACSD is briefly introduced to implement the relevant ideas.

Low-fidelity prototyping with simple collaborative tabletop computer-aided design systems

2018 ◽  
Vol 70 ◽  
pp. 307-315 ◽  
Author(s):  
Erdem Kaya ◽  
Sema Alacam ◽  
Yasin Findik ◽  
Selim Balcisoy
Keyword(s):  
Computer Aided Design ◽  
Computer Aided ◽  
Design Systems ◽  
Aided Design

Development of computer-aided design systems for metal-forming processes

1989 ◽  
Vol 21 (3) ◽  
pp. 185
Author(s):  
Y. Mitani ◽  
H.R.R. Merchand ◽  
E. Velazquez
Keyword(s):  
Metal Forming ◽  
Computer Aided Design ◽  
Computer Aided ◽  
Design Systems ◽  
Aided Design

scholarly journals Verification of modeling wired antennas by the method of moments

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
A. Alhaj Hasan ◽  
◽  
A.A. Kvasnikov ◽  
S.P. Kuksenko ◽  
T.R. Gazizov ◽  
...  
Keyword(s):  
Method Of Moments ◽  
Input Impedance ◽  
Computer Aided Design ◽  
Segment Length ◽  
Good Match ◽  
Half Wave ◽  
Computer Aided ◽  
Design Systems ◽  
Aided Design ◽  
Frequency Dependences

. Modeling of several antennas by the method of moments in the TALGAT system was performed for comparison with tested results. At first, the published results for half-wave and wave dipoles are compared with our results. Current module distributions and frequency dependences of the real and imaginary parts of the input impedance are obtained. The results showed a good match. Then the published experimental and analytical results for the radiation pattern and frequency dependence of the admittance of the gull shape antenna are compared with our results. The convergence of the results with segment length decreasing is shown. A good match is obtained. It is shown that detailed testing is important in the process of implementation and development of computer-aided design systems

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