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Articles by Simon Weir
Condensed Matter > Soft Condensed Matter
[Submitted on 22 Oct 2026] Title:Functional understanding of structural components in polypseudorotaxane gels View a PDF of the paper titled Functional understanding of structural components in polypseudorotaxane gels, by Ella Sapsford and 6 other authors View PDF HTML (experimental) Abstract:Biomedical devices, wearable interfaces, and soft robots require compliant soft materials with reliable mechanical performance, yet the molecular principles needed to design such materials are not always...
Simon the Bike Guy - World Guinness Book of Records for Penny Farthing one hour - Ginninderry Community Switch
A fun community event watching history being made. Simon the Bike Guy (Simon Weir) will be riding his penny farthing bike around Brad Haddin Oval in Queanbeyan Park and attempting to break the World Guinness Book of Records for one hour on the Penny Farthing. There will be food available and a kid’s bike race too. Gold coin donation Dates and Times Organiser Simon Weir Phone: 0450921889 View Organiser Website Price and bookings Location Queanbeyan Park Street Queanbeyan, NSW 2620
Topological linking determines elasticity in limited valence networks - Nature Materials
Abstract Understanding the relationship between the microscopic structure and topology of a material and its macroscopic properties is a fundamental challenge across a wide range of systems. Here we investigate the viscoelasticity of DNA nanostar hydrogels—a model system for physical networks with limited valence—by coupling rheology measurements, confocal imaging and molecular dynamics simulations.
Runaway transition in irreversible polymer condensation with cyclization
The process of polymer condensation, i.e., the formation of bonds between reactive end groups, is ubiquitous in both industry and biology. Here we study generic systems undergoing polymer condensation in competition with cyclization.
Effects of Monovalent and Divalent Cations on the Rheology of Entangled DNA
Effects of Monovalent and Divalent Cations on the Rheology of Entangled DNA In this paper we investigate the effects of varying cation valency and concentration on the rheology of entangled Lambda DNA solutions. We show that monovalent cations moderately increase the viscoelasticty of the solutions mainly by stabilising linear concatenation of Lambda DNA ``monomers'' via hybridisation of their sticky ends.
Top 10 Motorcycle Routes through the Alps
By Simon Weir Author of the best-selling Bikers’ Britain series, former Bike staffer and RiDE editor, rode to Australia in 2019 on a Kawasaki Z1000SX, now runs a touring website at www.simonweir.co.uk Above: Col de Vars in the French Alps on a sunny day (Picture credit: Mark Manning/Bauer) There’s nowhere on earth quite like the Alps. They’re motorcycle-touring heaven and once you discover them, it’s easy to get hooked. I’ve been visiting them obsessively for more than 20 years.
Fluidification of Entanglements by a DNA Bending Protein
Abstract In spite of the nanoscale and single-molecule insights into nucleoid associated proteins (NAPs), their role in modulating the mesoscale viscoelasticity of entangled DNA has been overlooked so far. By combining microrheology and molecular dynamics simulation, we find that the abundant NAP “integration host factor” (IHF) lowers the viscosity of entangled λDNA 20-fold at physiological concentrations and stoichiometries.
Going the distance: 120 years of Royal Enfield adventures
Enfield riders took on the treacherous Karakoram Pass on the ancient Silk Road Maintenance work must be carried out by riders on these tough adventures Royal Enfield have never shied away from adventure Jack and his Himalayan set records when lapping the globe A 30 country journey in 700 days for Jack Groves Challenges don’t come much tougher than those faced by Royal Enfield Ice and snow on the way to the South Pole A classic Royal Enfield poster 5504 miles across Australia in just 15 days.
Ride of a lifetime: The best til last
I’d been warned that Tasmania wouldn’t be as warm as mainland Australia (the North Island). I wasn’t expecting it to be quite so cold, though. I rolled off the Spirit of Tasmania ferry in Devonport East into a chilly morning. I'm wearing almost all my layers but it wasn’t enough: I stopped at the first café I saw, grabbed a warming breakfast, then pulled my waterproofs on top of my leather jacket and Draggin Jeans. So many people had told me that I couldn’t go wrong in Tasmania.
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