?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Self-Replicating+Strands+that+Self-Assemble+into+User-Specified+Meshes&rft.creator=Ewaschuk%2C+Robert&rft.creator=Turney%2C+Peter&rft.subject=Dynamical+Systems&rft.subject=Theoretical+Biology&rft.description=It+has+been+argued+that+a+central+objective+of+nanotechnology+is+to+make%0Aproducts+inexpensively%2C+and+that+self-replication+is+an+effective+approach+to%0Avery+low-cost+manufacturing.+The+research+presented+here+is+intended+to+be+a%0Astep+towards+this+vision.+In+previous+work+(JohnnyVon+1.0)%2C+we+simulated%0Amachines+that+bonded+together+to+form+self-replicating+strands.+There+were+two%0Atypes+of+machines+(called+types+0+and+1)%2C+which+enabled+strands+to+encode%0Aarbitrary+bit+strings.+However%2C+the+information+encoded+in+the+strands+had+no%0Afunctional+role+in+the+simulation.+The+information+was+replicated+without+being%0Ainterpreted%2C+which+was+a+significant+limitation+for+potential+manufacturing%0Aapplications.+In+the+current+work+(JohnnyVon+2.0)%2C+the+information+in+a+strand%0Ais+interpreted+as+instructions+for+assembling+a+polygonal+mesh.+There+are+now%0Afour+types+of+machines+and+the+information+encoded+in+a+strand+determines+how%0Ait+folds.+A+strand+may+be+in+an+unfolded+state%2C+in+which+the+bonds+are+straight%0A(although+they+flex+slightly+due+to+virtual+forces+acting+on+the+machines)%2C+or%0Ain+a+folded+state%2C+in+which+the+bond+angles+depend+on+the+types+of+machines.+By%0Achoosing+the+sequence+of+machine+types+in+a+strand%2C+the+user+can+specify+a%0Avariety+of+polygonal+shapes.+A+simulation+typically+begins+with+an+initial%0Aunfolded+seed+strand+in+a+soup+of+unbonded+machines.+The+seed+strand+replicates%0Aby+bonding+with+free+machines+in+the+soup.+The+child+strands+fold+into+the%0Aencoded+polygonal+shape%2C+and+then+the+polygons+drift+together+and+bond+to+form%0Aa+mesh.+We+demonstrate+that+a+variety+of+polygonal+meshes+can+be+manufactured%0Ain+the+simulation%2C+by+simply+changing+the+sequence+of+machine+types+in+the%0Aseed.&rft.date=2005-02&rft.type=Departmental+Technical+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F4110%2F1%2FNRC-47442.pdf&rft.identifier=++Ewaschuk%2C+Robert+and+Turney%2C+Peter++(2005)+Self-Replicating+Strands+that+Self-Assemble+into+User-Specified+Meshes.++%5BDepartmental+Technical+Report%5D++++(Unpublished)++&rft.relation=http%3A%2F%2Fcogprints.org%2F4110%2F