On path space kQ, there is a trivial kQ-module structure determined by the multiplication of path algebra kQ and a trivial kQ-comodule structure determined by the comultiplication of path coalgebra kQ. In this paper, on path space kQ, a nontrivial kQ-module structure is defined, and it is proved that this nontrivial left kQ-module structure is isomorphic to the dual module structure of trivial ...

Existing meshand voxel-based modeling methods encounter difficulties when dealing with objects containing cellular structures on several scale levels and varying their parameters in space. We describe an alternative approach based on using real functions evaluated procedurally at any given point. This allows for modeling fully parameterized, nested and multi-scale cellular structures with dynam...

A practical objective in the control of flexible space structures is to minimize the effects of vibrational dynamics at certain specified points on a structure. State feedback can he used to address this question by creating closed-loop modes that are unobservable at these points and so do not contribute to the measured response. In the frequency domain, such modes correspond to pole/zero cance...

Keywords--Design automation, Neural networks, minimum weight design, Lyapunov function, optimization, trusses

This paper describes a method based on metric structures for anatomical analysis on a large set of brain MR images. A geodesic distance between each pair was measured using large deformation diffeomorphic metric mapping (LDDMM). Manifold learning approaches were applied to seek a low-dimensional embedding in the highdimensional shape space, in which inference between healthy control and disease...

Coherent nonlinear structures in the form of vortical motions are frequently observed in laboratory devices and in auroral plasmas. Our objective here is to suggest that any realistic description of plasma vortices must involve three-dimensional nonlinear wave models, which account for the nonlinear coupling between finite amplitude electrostatic and/or electromagnetic disturbances. Specificall...

BACKGROUND Retroperitoneal enterogenous cysts are uncommon and adenocarcinoma within such cysts is a rare complication. CASE PRESENTATION We present the third described case of a retroperitoneal enterogenous cyst with adenocarcinomatous changes and only the second reported case whereby the cyst was not arising from any anatomical structure. CONCLUSION This case demonstrates the difficulties...

In studying the case studies of traditional architectures according to Christopher Alexander’s theory about “the nature of order” and the fifteen fundamental properties introduced, it is important to note that the ontology of the theory is based on human’s indigenous feeling about architecture, which subsequently implies these kind of studies to be based on people’s cognitive images induced fro...

Recent developments in the area of smart structures indicate that variable geometry / stiffness truss network is of fundamental importance in designing smart transformable structures and systems for space applications. This paper presents the conceptual design and dynamic modeling of a cooperative re-configurabel dual-arm robotic structure called Dual-Arm Cam-Lock Manipulator. The Manipulator i...

The advent of modernity in Iran weakened many structures and practices, including social hangouts in cities; therefore, the public was cynical about this space. While hangouts, as a third-place and public space in a city, promote social capital, vibrant centers, and citizenship education, Tehran Daneshjoo Park, as a public space with an urban scale and physical and social features, can also be ...