The shaping of individual cells requires a tight coordination of cell mechanics and growth. However, it is unclear how information about the mechanical state of the wall is relayed to the molecular processes building it, thereby enabling the coordination of cell wall expansion and assembly during morphogenesis. Combining theoretical and experimental approaches, we show that a mechanical feedbac...

Presented in this paper is an interactive approach of assembly planning. It provides a virtual reality interface for production engineers to program the virtual representation of robotic manipulators in a three-dimensional operation space. The direct human involvement creates a user-defined assembly sequence, which contains the human knowledge of mechanical assembly. By extracting the precedenc...

With the increasing level of automation in assembly planning and assembly execution, it becomes more obvious that there is a gap between the output of Q mechanical designer and an assembly planner. The question is: How t o describe a designed assembly to an assembly planning system? The input to almost all the current reported automatic assembly planning systems is one-static-state of the final...

Assembly planning is the core of automating product assembly, maintenance, and recycling for modern industrial manufacturing. Despite its importance long history research, mechanical assemblies when given final assembled state remains a challenging problem. This due to complexity dealing with arbitrary 3D shapes highly constrained motion required real-world assemblies. In this work, we propose ...

with the growth in customers’ demand diversification, mixed-model u-lines (mmul) have acquired increasing importance in the area of assembly systems. there are generally two different approaches in the literature for balancing such systems. some researchers believe that since the types of models can be very diverse, a balancing approach without simultaneously sequencing of models will not yield...

Amyloid-β (Aβ) self-assembly into cross-β amyloidfibrils is implicated in a causative role in Alzheimer’s disease pathology.Uncertainties persist regarding the mechanisms of amyloid self assembly and the role of metastable prefibrillar aggregates. Aβ fibrilsfeature a sheet-turn-sheet motif in the constituent β-strands; as such, turn nucleation has been proposed as a rate-limiting step in the se...

The mechanical properties of composite membranes obtained by self-assembly of actin filaments with giant fluid vesicles are studied by micromanipulation with optical tweezers. These complexes exhibit typical mechanical features of a solid shell, including a finite in-plane shear elastic modulus ( approximately 10(-6) N/m). A buckling instability is observed when a localized force of the order o...

A network of entangled multiwall carbon nanotubes is an assembly of non-bonded and randomly oriented units whose mechanical behavior is affected by their buckling, compression and slippage at contact points. Slippage and irreversible nanotube rearrangements are evidenced by the hysteresis in the stress-strain curves during loading and unloading cycles. To model the mechanical behavior, a nonlin...

This paper considers the application of functional modelling to the automated production of FMEAs for mechanical systems. We consider how a functional model can be generated algorithmically from the geometric and assembly data already present for a device in a CAD/CAM system. We present the functional model used for representing the mechanical system, and propose reasoning techniques that can b...

self-assembly, patterning, and characterization Miao Lu, Min-Woo Jang, Greg Haugstad, Stephen A. Campbell, and Tianhong Cui Department of Mechanical Engineering, University of Minnesota, 1100 Mechanical Engineering 111 Church Street S.E., Minneapolis, Minnesota 55455, USA Department of Electrical and Computer Engineering, University of Minnesota, EECS Building 200 Union Street S.E., Minneapolis...