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CBE Seminar: “Collaboration and Competition Between Active Sheets for Self-Propelled Particles”

Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

Abstract: Biological species routinely collaborate for their mutual benefit or compete for available resources, thereby displaying dynamic behavior that is challenging to replicate in synthetic systems. Here, we use computational modeling to design microscopic, chemically active sheets and self-propelled particles encompassing the appropriate synergistic interactions to exhibit bio-inspired “feeding”, “fleeing” and “fighting”. This design couples […]

MEAM Seminar: “Liquid Crystal Elastomers”

Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

Liquid crystal elastomers are rubbery solids with liquid crystal mesogens incorporated into their main chains. They display an isotropic to nematic phase transformation accompanied by a large spontaneous deformation. This in turn leads to rich variety of phenomena including ultra-soft behavior, stripe domains, shape-morphing etc. Further, when made as slender structures, the structural instability of […]

MEAM Doctoral Dissertation Defense: “Applications of a Double-stranded Elastic Rod Model to DNA”

4E9, DRLB 209 S. 33rd Street, Philadelphia, PA, United States

In the first part of the presentation, we discuss a double-stranded elastic rod (birod) model and apply it to study allosteric interactions between two ligands on DNA. Next, we combine the birod model with statistical mechanics and use it to study the temperature-induced strand separation in dsDNA. Allosteric interaction between two ligands on DNA is […]

Britton Chance Distinguished Lecture: “Regenerative Immunology: The Role of Technology Translation in Guiding Discovery”

Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

Abstract: Biomaterial implants have a long history in the clinic, but regenerative biomaterials and regenerative medicine therapies, in general, have been slow to reach patients. Clinical translation provides a unique and critical opportunity to investigate the key therapeutic drivers of technology efficacy in people. Careful evaluation of clinical outcomes and reevaluation of design parameters is […]

PICS Seminar – Dr. Yoichiro Mori of the University of Pennsylvania & the University of Minnesota

PICS Conference Room 534 - A Wing , 5th Floor 3401 Walnut Street, Philadelphia, PA, United States

Abstract: Mathematical Justification of Slender Body Theory Systems in which thin filaments interact with the surrounding fluid abound in science and engineering. The computational and analytical difficulties associated with treating thin filaments as 3D objects has led to the development of slender body theory, in which filaments are approximated as 1D curves in a 3D […]

MEAM Seminar: “Microdevices Enabled by Rarefied Flows”

Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

In this talk we will review emerging applications of rarefied gas dynamics for microscale sensing, actuation and power generation. Performance of conventional fluidic devices such as pumps, combustors and heat engines decreases at the microscale due to greater viscous and heat transfer losses. Unconventional micro/nanodevices exploit the tight coupling between non-equilibrium gas, liquid and solid-state […]

CBE Faculty Candidate Seminar: “Understanding and Controlling the Complexity of Catalytic Active Sites”

Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

Abstract: Heterogeneous catalysis is of central importance to the global economy today, facilitating the conversion of raw materials into valuable fuels and chemicals, and the abatement of chemical pollutants in an efficient way. As environmental concerns associated with the use of fossil fuels and increased viability of alternative technologies motivate a transition away from traditional […]

BE Seminar: “Immunomodulatory Biomaterials for Limb Salvage”

Room 337, Towne Building 220 South 33rd Street, Philadelphia, PA, United States

Diabetes and peripheral arterial disease affect hundreds of millions of people worldwide. Patients with these conditions frequently develop chronic wounds on the lower limbs that lead to amputation, with a 5-year mortality rate as high as 77%. Macrophages, the primary cell of the innate immune system, are critical regulators of angiogenesis and wound healing. Their […]

CBE Faculty Candidate Seminar: “Facilitating Chemical Process Development Using Theoretical Modeling and Machine Learning”

Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

Abstract: Computational modeling is an important tool to aid chemical process development. Theoretical and data-driven models can be applied both for the optimization of specific processes, and for the initial screening of potential process chemistries. I will talk about my research in advancing both of these areas. First, I will introduce the development of an […]

MEAM Seminar: “Recent Evolution of Climate Science: From Greenhouse Gases and Temperature to Aerosol Particles and Precipitation”

Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

On the eve of the Intergovermental Panel on Climate Change (IPCC) Sixth Assessment Report, I will present a brief overview of how climate science has evolved since the publication of the Charney Report in 1979, and use a few examples from my recent work to show how one can use numerical models, observations and theories […]