PhDSupervision:Dhananjay Ipparthi

Personal Information

Name: Dhananjay Ipparthi

Date of arrival in Brussels: 08th February, 2012

Home address: Rue des Vierges 58, 1000 Bruxelles

Telephone number: +32 483 382 207

Milestones

• Three papers
• Thesis
  • Table of contents

Papers in progress

• Yield Predictions for a Model of Homogeneous Parallel Aggregation
  • Authors: Dhananjay Ipparthi, Andrew Winslow, Metin Sitti, Marco Dorigo, Massimo Mastrangeli.
  • Target journal: Artificial Life, or Entropy, or Soft Materials
  • Synopsis: Statistics to compare model and physical experiments. A closed form model for the formation of incompatible substructures??
  • Project page: Theory of incompatible substructure problem
  • Forecast submission: August 31, 2016

• Solutions to the incompatible substructures problem in macroscale systems
  • Authors: Dhananjay, Andrew Winslow, Massimo Mastrangeli and Marco Dorigo
  • Target journal:
  • Synopsis: Presentation of the different approaches to the incompatible substurcture problem: modifying geometry, modifying bonding rules, conformational switching, high inertia particles, partitioning the container and self-assembly.
  • Project pages: Conformational Switching, Use of a external agent to break incompatible substructures

• Dynamics of a macro-scale self-assembling system
  • Authors: Dhananjay Ipparthi, Nicolas Cambier, Andrew Winslow, Massimo Mastrangeli and Marco Dorigo
  • Target journal:
  • Synopsis: Study of how the incompatible substructures are formed, how the grow and a summary of possible ways to eliminate the problem. Experiments to validate incompatible substructures model and growth of incompatible substructures. Impact of different modes of shaking on a self-assembling system: orbital, linear, orbital + linear with kicks (random)
  • Project page: Dynamics of self-assembly

• Review of macroscale parallel self-assembling systems
  • Authors: Dhananjay Ipparthi, Marco Dorigo and Massimo Mastrangeli.
  • Target journal: Micromachines: Special Issue on Building by Self-Assembly
  • Synopsis: An in-depth review of macroscale parallel self-assembling systems. Summaries, categorisations and differentiations of the various works till date. Provide open problems.
  • Project page: Parallel self-assembling systems review paper

Academic Activities

17th February - 20th April, 2016

• Setup experiment workspace
  • Installed shaker + universal platform
  • Cut out containers
  • Installed lighting system
  • Installed and calibrated video tracking system
• Conducted ~ 1100 trials for extended yield predictions paper
• Modified master equation based simulation in order to collect relevant data
• Plotted model vs. physical experiment data
• Plotted possible number of combination vs. observed combinations data
• Complete revision of the conformational switching design --- pendulum based
  • 3 iteration of the pendulum design
• Random shaker design and fabrication
• Preliminary experiments with high inertia particles
• Designed and fabricated jib for shaking with periodic kicks
• Preliminary work on theoretical study on homogeneous set of components
• Designed and fabricated container with no walls
  • Conducted preliminary tests
  • Test results not particularly promising
• Preliminary setup of dynamic self-assembly system

8th February - 16th February, 2016

• Presented my work to the "Programmable self-assembly subgroup" on the 11th of February. Metin attended that presentation. The group expressed interest in one of the results presented in "A geometrical approach to the incompatible substructure problem in parallel self-assembly". The wanted to know why the 90 deg component experiments resulted in a high yield. I told the group that we suspect that symmetry and the high probability of forming pairs could be the reason for the high yield. I added that we would be studying this phenomenon in detail using video tracking in our upcoming work on the extended yield prediction paper. The group also had some input for the issues I have with regard to the conformational switching work.
• Increased the shielding of conformational switching components. The increased shielding seems to reduce the local effects of magnets in the vicinity.
• Finished designing the jig that we will use to create "random kicks" during orbital shaking. I will be meeting the in-house production engineer this afternoon before getting it fabricated.
• The shaker has not yet arrived. The secretary here (Janina) says we would have to wait for a few more weeks.