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Welcome to the 2017 UMaine Student Symposium: Research and Creative Activity electronic event program. This electronic program includes student abstracts, student presentation style descriptions, and presentation schedules. It also includes a map of the venue layout, schedule of the entire day’s events and programs, as well as details and information regarding our sponsors and selected university programs.

We hope you enjoy a full day of student presentations, guest speakers, award ceremonies, and the chance to network with UMaine students, faculty, staff, as well as local and state industry and community leaders! 
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Monday, April 24 • 9:15am - 10:30am
Oral Presentations – Physical Sciences

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Speakers
avatar for Samuel Borer

Samuel Borer

Physics and Mathematics, 9:15AM-10:30AM
Characterizing Liquid Argon Time Projection Chambers for Neutrino Physics When particle physicists want to study the fundamental particles of the universe, they cannot flip through a catalog to find the scientific instrument perfect for the task. They must develop their own tools and, rigorously test and improve upon their design. Scientific exploration can often be shunted by the quality of your instrument. Never is this more prevalent than our probe of neutrinos. Exclusively interacting with the weak force, peculiarly oscillating between its three... Read More →
MH

Muhammad Hossen

Chemistry, Bioengineering, 9:15AM-10:30AM, 1:00PM-2:15PM
Dry & Wet Stiffness Increase and Structure Stabilization of Cellulose Nanofibrils (CNF) Aerogels in Aqueous Environment (Room 4 Presenter 3, 9:15AM-10:30AM) | | Porous cellulose nanofibrils (CNF) based aerogels are capable of absorbing and storing a significant amount of liquid inside the 3D structure. As the porosity of the CNF aerogels goes higher, the amount of liquid absorption increases linearly. One of the biggest problems of 3D CNF aerogels with high porosity is that the structure breaks down very rapidly in aqueous environments. Here we describe a method to overcome this deficiency by adding methacrylate functionalized carboxymethyl cellulose (MetCMC) into the CNF system followed by crosslinking between the methacrylate groups of MetCMC. The resultant polymer composite matrix successfully maintains a robust 3D structure without collapsing when rewetted and stored in aqueous environments. When rewetted CNF-MetCMC composite is freeze dried it maintains its size and shape whereas air drying causes shrinkage of the volume. Air dried CNF-MetCMC swells and increases in volume to some extent when rewetted. A greater mass fraction of CNF in the whole composition stabilizes the air dried structure against swelling in an aqueous environment. Cross-linking between methacrylate groups enhances the dry and wet modulus of CNF-MetCMC aerogels | | Co-authors: Alexander Lafrance, Matthew Talbot, Michael D Mason | | Measurement of Porosity of CNF Aerogels Using Silicone Oil (Section A Poster 27, 9:15AM-10:30AM) | | Freeze drying of aqueous slurries of cellulose nanofibrils (CNF) with different wt% of water generates CNF aerogels with different porosities. Measurement of CNF... Read More →
CK

Courtney King

Earth and Climate Sciences, 9:15AM-10:30AM
A climate history: Using glacial geologic landforms to understand past behavior of the Antarctic Ice Sheet | | During the last glacial period, the Antarctic Ice Sheet (AIS) expanded across what today is the Ross Sea. This grounded Ross Sea Ice Sheet (RSIS) caused inflowing outlet glaciers from East Antarctica to thicken and expand into formerly ice-free valleys of the Transantarctic Mountains (TAM). Located between the East Antarctic plateau and the Ross Embayment, the TAM provide an ideal setting to study the fluctuation history of the former RSIS. This region affords insight into the history of past expanded ice, as well as on potential future behavior of the AIS. To study the past behavior, I mapped the glacial geomorphology and dated samples of ancient algae from relict ice-dammed ponds along a transect from the last glacial maximum position to the present-day glacier. A radiocarbon chronology from Lake Wellman valley, adjacent to lower Hatherton Glacier, indicates the maximum position was achieved 9500 yr BP, with subsequent gradual and continuous thinning until ~2000 yr BP. This delayed maximum is likely due to increased snow accumulation over the polar plateau during the global deglaciation (~19,000-11,000 yr BP). These data, along with precisely constructed chronologies from other outlet glacier systems, may be input into geophysical models to predict the future behavior of the AIS. | | Faculty Mentor: Brenda... Read More →

Session Chair
MH

Muhammad Hossen

Chemistry, Bioengineering, 9:15AM-10:30AM, 1:00PM-2:15PM
Dry & Wet Stiffness Increase and Structure Stabilization of Cellulose Nanofibrils (CNF) Aerogels in Aqueous Environment (Room 4 Presenter 3, 9:15AM-10:30AM) | | Porous cellulose nanofibrils (CNF) based aerogels are capable of absorbing and storing a significant amount of liquid inside the 3D structure. As the porosity of the CNF aerogels goes higher, the amount of liquid absorption increases linearly. One of the biggest problems of 3D CNF aerogels with high porosity is that the structure breaks down very rapidly in aqueous environments. Here we describe a method to overcome this deficiency by adding methacrylate functionalized carboxymethyl cellulose (MetCMC) into the CNF system followed by crosslinking between the methacrylate groups of MetCMC. The resultant polymer composite matrix successfully maintains a robust 3D structure without collapsing when rewetted and stored in aqueous environments. When rewetted CNF-MetCMC composite is freeze dried it maintains its size and shape whereas air drying causes shrinkage of the volume. Air dried CNF-MetCMC swells and increases in volume to some extent when rewetted. A greater mass fraction of CNF in the whole composition stabilizes the air dried structure against swelling in an aqueous environment. Cross-linking between methacrylate groups enhances the dry and wet modulus of CNF-MetCMC aerogels | | Co-authors: Alexander Lafrance, Matthew Talbot, Michael D Mason | | Measurement of Porosity of CNF Aerogels Using Silicone Oil (Section A Poster 27, 9:15AM-10:30AM) | | Freeze drying of aqueous slurries of cellulose nanofibrils (CNF) with different wt% of water generates CNF aerogels with different porosities. Measurement of CNF... Read More →

Judges

Monday April 24, 2017 9:15am - 10:30am
Room 4

Attendees (2)