Aerospace Engineering Seminar Series: Subarna Pudasini and Parker Smith "Trajectory Optimization of Morphing Aerial Vehicles with Aeroservoelastic Effects"

Thursday, April 2, 2026; 3:00pm-4:00pm
028 ECoRE
Speaker: Subarna Pudasini and Parker Smith from Penn State

Abstract: Morphing aerial vehicles offer potentially enhanced maneuverability and efficiency over their fixed-wing counterparts; however, the trade-off between performance gains and actuation costs in dynamic maneuvers remains under-explored. What further complicates the exploration is the inherent multi-disciplinary nature of morphing aerial vehicles: The unsteady aerodynamics, structural dynamics, and control are tightly coupled, resulting in highly nonlinear aeroservoelastic dynamics. We took a progressive approach to the analysis of morphing aerial vehicles that gradually increases the model fidelity. We first performed a preliminary study using a low-fidelity linear parameter-varying model, which established the reachability benefits of morphing and the necessity of trajectory optimization over kinematic planning to ensure dynamic feasibility. Subsequently, a mid-fidelity aeroservoelastic model was integrated into a trajectory optimization framework to evaluate trajectory-level impacts across complex maneuvers. Results demonstrate that utilizing trajectory optimization to exploit aero-mechanical coupling allows morphing vehicles to achieve significantly enhanced maneuverability with superior energy efficiency. Moving forward, this research aims to develop physics-informed reduced-order models (PIROMs) and controllability metrics analogous to those in linear systems to quantify maneuverability without the computational overhead of large-scale trajectory optimization. These advancements will provide the necessary tools to eventually facilitate the full control co-design of autonomous morphing aerial vehicles.

Speaker Bio: Subarna Pudasaini is an M.S. student in Aerospace Engineering at Penn State. He earned his Bachelor of Engineering in Aerospace Engineering from the Institute of Engineering (I.O.E.), Tribhuvan University, in 2023. His current research focuses on the control co-design of morphing aerial vehicles, with a particular emphasis on developing physics-informed reduced-order models. These models aim to provide the necessary accuracy for complex multi-disciplinary systems while remaining computationally efficient for integration into high-level optimization workflows.

Speaker Bio: Parker Smith is an undergraduate Aerospace Engineering student at Penn State. His research focuses on morphing aircraft, driven by a passion for bridging the gap between natural flight and real-world aerial systems. His work spans aeroelastic simulation, control co-design, and trajectory optimization to enable more adaptive and efficient flight.

Hosted by: Jessica Chhan,  jmc7050@psu.edu

Correlating Structure to Performance in Soft Materials with Neutron Scattering

Thursday, April 2, 2026; 10:35am
Capone Learning Auditorium (CBEB 001)
Speaker: Mark Dadmun from University of Tennessee

Neutron scattering and reflectivity are unique tools that offer insight into the ordering and structure of complex and multi-component materials on length scales from a few angstroms to 100’s of nanometers. In recent years, our group has focused on using neutron scattering to determine the structure of functional materials to provide insight into the fundamental processes that govern their functionality.

 For instance, soft structured materials such as Nanoparticle Organic Hybrid Materials (NOHMs) and Microemulsions (MEs) have been considered as novel electrolytes in redox flow batteries. To better understand the performance of microemulsions in redox flow batteries and correlate structure to performance, we use small-angle neutron scattering (SANS) to investigate the impact of surfactant molecular structure on the structure and properties of their oil/water microemulsions, which in turn impacts their performance in devices.  More precisely, we examine the impact of the molecular structure of non-ionic surfactants on the morphology, domain size, and interfacial rigidity in water/toluene/surfactant microemulsions.  In these studies, the structure and properties of water/toluene/surfactants microemulsions that contain Tween-20 and Brij-35 are determined by small angle neutron scattering.  Tween-20 and Brij-35 were chosen as the are both non-ionic surfactants with similar atomic composition, but vary in their molecular structure where the Brij-35 is a linear molecule, and Tween-20 is branched.  This variation in molecular topology impacts the assembly of the surfactant at the oil/water interface, which influences the rigidity of the interface and morphology of the microemulsion, which will be discussed.  These structural changes are correlated to the conductivity and ion diffusion in these microemulsions.

Similarly, polyimide aerogels (PIA) saturated with ionic liquids are promising materials as robust electrolytes for next generation batteries. However, progress in designing materials with improved performance is limited by the lack of insight into structure-property relationships. In our recent work, we have carefully analyzed small angle scattering of Ionic liquid/PIA constructs to  provide interfacial surface area, average domain size, and importantly, phase composition of the aerogel.  In these studies, the thorough analysis of SANS data from PIA/ionic liquid mixtures shows that the ionic liquid unexpectedly penetrates the polyimide aerogel. This unanticipated structure impacts charge transport and therefore performance of the aerogel as a battery component, providing crucial structure-property correlations that can id in future materials design.

Finally, I will discuss our work where we have investigated the assembly of the ionic liquid methyl trioctyl ammonium chloride (MTOAC) in deuterated xylene to correlate its nanoscale and mesoscale assembly to its observed charge transport properties by SANS. These neutron scattering experiments demonstrate that MTOAC suspended in deuterated m-xylene forms stable spherical structures that have a radius of ca. one MTOAC molecule and are the most abundant structure in solution. Free MTOAC molecules are also present in the solvent but less prevalent than spheres. Occasionally, spheres collide to form long-lived metastable cylindrical structures; these remain a minority structure as their population is dependent on the population of spheres. As MTOAC concentration increases, the amount of both spheres and free molecules increases, resulting in more mobile charge carriers within the solvent.  This structural change results in a decrease in the resistivity. In contrast, the cylinder population remain constant, indicating that they do not impact the resistivity/conductivity of the solutions. These result therefore indicate that the spheres and free MTOAC drive the macroscopic conductivity of the solutions. The presence of the spheres and cylinders also offer a domain where metal ions are welcome in separation processes, and thus the metal ions that are sequestered into the interior of the spherical or cylindrical structures are available for separation, providing further structure-performance relationship detail that can guide rational improvement of the materials.

Hosted by: Angela Dixon,  adc12@psu.edu

Millimeter Wave Antennas and Beamforming for Wireless Communication and Imaging Systems

Wednesday, April 1, 2026; 121 Earth & Engineering Science Building
3:35-4:25 p.m.
Speaker: Abdel R. Sebak from Concordia University Research Chair in Millimeter-wave Antennas and Systems, Electrical and Computer Engineering

As mobile communication technologies continue to advance and find applications across diverse sectors, their influence on daily life will deepen. Future systems will be required to deliver high-data-rate, ultra-low-latency services for a broad range of communication needs. Meeting these demands requires innovative approaches, and one promising direction is the exploitation of millimeter-wave (mmWave) frequency bands, which offer abundant spectrum resources. With their shorter wavelengths, mmWave frequencies enable physically smaller antennas and circuits while providing significantly wider bandwidth than traditional microwave frequencies. These advantages are key for supporting the next generation of wireless networks, where base stations and mobile devices will increasingly rely on mmWave to meet ever-growing demands for data capacity. This talk will explore the market need for compact, high-efficiency antennas for next-generation wireless communications, sensing, and imaging systems. The design of mmWave antennas must address requirements such as highly directional radiation patterns—for extended transmission range and enhanced detection sensitivity—compact size, and broad impedance-matching bandwidth. The core of the presentation will focus on the research and development of high-gain, broadband mmWave antennas and beamforming solutions that span multiple mmWave frequency bands, enabling versatile, multi-application use. Special emphasis will be placed on state-of-the-art guiding structures, particularly printed ridge gap waveguide (PRGW) technology, which offers low loss and minimal dispersion compared to conventional PCB-based designs. The talk will also detail the key components required for implementing a PRGW-based beamforming antenna system.

Dr Abdel Razik Sebak is a Tier I Concordia University Research Chair. Before joining Concordia University, he was a professor at the University of Manitoba. He was also with Cairo University and worked with the Canadian Marconi Company on the design of microstrip phased array antennas. Dr Sebak’s recent research activities cover two streams: Antenna Engineering, and Analytical and Computational Electromagnetics. Applied and sponsored projects include high gain mm-wave antennas, advanced composite materials for aerospace shielding and antenna applications, microwave sensing and imaging, ultra-wideband antennas, and microwave beamforming. Dr. Sebak’s original research contributions and technical leadership have been extensive and resulted in over 650 publications in prestigious refereed journals and international conference proceedings (h-index 52). He is among the world top 2% scientists Scopus Citation according to Science-wide author databases of standardized citation indicators. Dr Sebak was inducted as a Fellow of the Institute of Electrical and Electronics Engineers in 2009. He is also a Fellow of the Engineering Institute of Canada. Dr. Sebak is a member of Concordia University Provost's Circle of Distinction for his career achievements. For his joint efforts in establishing one of the most advanced electromagnetic computational and antennas labs at the University of Manitoba, Dr. Sebak received the Rh Award for Outstanding Contributions to Scholarship and Research. Dr. Sebak received the 1992 and 2000 University of Manitoba Merit Award for outstanding Teaching and Research. In 1996 Dr. Sebak received the Faculty of Engineering Superior Academic Performance. Dr Sebak has also received the IEEE Antennas and Propagation Society Best Chapter Award. Dr Sebak served as a Section Chair, NSERC Discovery Grant Evaluation Group, Electrical and Computer Engineering Group. He is the General Chair of the IEEE ITC-EGYPT2025, the IEEE-ANTEM2016 Symposium and Co-Chair of the IEEE ICUWB2015. He has served as Chair for the IEEE APS Ad-Hoc Award Committee (2022-2024). Dr. Sebak has also served as Chair for the IEEE Canada Awards and Recognition Committee (2002-2004), IEEE Canada Conference Committee (2000-2002) and as the Technical Program Chair for the 2002 IEEE CCECE Conference and the 2006 URSI-ANTEM Symposium. He has also served as a member (2002-2004) of the IEEE RAB Awards and Recognition Committee. Dr. Sebak has served as Associate Editor, Journal of Applied Computational Electromagnetic Society, Associate Editor, International Journal of Antennas and Propagation. Associate Editor, J. Engineering Research. He is a member of the Canadian National Committee of International Union of Radio Science (URSI) Commission B.

Hosted by: Lana Fulton,  lub18@psu.edu

Aerospace Engineering Seminar Series: Jason Cornelius “From Whiteboard to Intercept: Building AI-Driven Aerospace Systems in the Real World”

Thursday, April 9, 2026; 3:00pm-4:00pm
028 ECoRE
Speaker: Jason Cornelius from Perseus Defense

Abstract: This talk traces my path from a small-town Pennsylvania student to leading a defense technology startup focused on countering emerging drone threats. I will discuss technical work spanning Bell Helicopter, NASA’s Dragonfly mission, and current efforts applying AI to aerospace design and optimization—including development of the lowest cost actively guided interceptor missile. Beyond the technical work, I will share lessons learned from rapidly building and testing real systems, and from operating at the intersection of engineering, national security, and entrepreneurship. This includes perspectives from engagements with the Pentagon and Congress, and what it takes to move ideas from whiteboard concepts to flight-tested hardware. The talk is intended to be both technically informative and candid, highlighting not just successes, but the failures and tradeoffs that shape real-world engineering.

Speaker Bio: Dr. Jason Cornelius completed his BS, MS, and PhD in Penn State’s aerospace engineering department. Over the course of his ten years at PSU, he co-founded the Wind Energy Club, learned Russian and Mandarin Chinese, obtained a graduate certificate in international affairs, taught SCUBA diving in the Natatorium, earned his Private Pilot’s license at the State College airport, and created an international drone competition. Dr. Cornelius joined the Titan Dragonfly team in late 2016 and worked on the program throughout his PhD and after as a Civil Servant at the NASA Ames Research Center. He left NASA last June to start his own company, Perseus Defense, to develop counter drone interceptor missiles for the Pentagon.

Hosted by: Jessica Chhan,  jmc7050@psu.edu

Sustainable Production of Therapeutic Monoclonal Antibodies

Thursday, April 9, 2026; 10:35am
Capone Learning Auditorium (CBEB 001)
Speaker: Todd Przybycien from Renseellaer Polytechnic Institute

The current platform process for monoclonal antibody (mAb) and related therapeutic production is complex and cannot sustainably meet the global need. The demand for mAbs in high-income countries and the unmet need in low and middle income countries (LMICs) is large and growing. New disease targets for mAbs, including pandemic infectious disease, Alzheimer’s and high cholesterol, have patient populations at least 10x of the current anti-inflammatory and anti-cancer therapeutic mAbs.  The shortage of tocilizumab for rheumatoid arthritis patients due to treatment of inflammation in Covid-19 patients during the pandemic highlighted current capacity limitations.  About 80% of global mAb production is consumed by the US, Canada and Europe; even if sold at current cost of goods, $50 to $200/gram, mAbs are out of reach for most patients in LMICs. 

     The economic sustainability bottleneck for mAb manufacture is the protein A (ProA) affinity chromatography-based platform downstream process (DSP).  Industrial process development thought leaders have suggested that upstream titer increases beyond 8 g/L may be pointless due to platform DSP limitations.  The platform DSP also has poor environmental sustainability with process mass intensities typically >10,000 with the ProA capture step alone using on the order of a liter of buffer per gram mAb produced.

     In a bid to sustainably meet the growing need for mAbs, including the economic, environmental and social dimensions of sustainability, we have developed a new, fully continuous, precipitation-based process for mAb downstream processing, drawing inspiration from the manufacturing process for blood plasma products.  This new process can be significantly cheaper, greater in capacity, and less raw material-intensive than current mAb manufacturing technology.  We’ll describe the genesis and evolution of the process, key process parameters, process performance in terms of mAb critical quality attributes and sustainability metrics, and the path forward.

Hosted by: Angela Dixon,  adc12@psu.edu

Repetition-Aware Indexing for Pangenomic Alignment

Monday, April 6, 2026; 10:00AM
W375 Westgate Building
Speaker: Dr. Christina Boucher from University of Florida

Dr. Christina Boucher is a Professor in the Department of Computer and Information Science and Engineering at the University of Florida. Her research focuses on the design of algorithms and compressed data structures for large-scale biological sequence analysis, enabling efficient search and analysis of massive genomic datasets. She has authored over 170 publications in bioinformatics, including many on succinct data structures, sequence alignment, and pangenomic analysis. Dr. Boucher has delivered keynote addresses at major international venues including WABI 2025, HiCOMB 2022, IGGSY 2022, SPIRE 2021, RECOMB-SEQ 2016, and the ECCB Workshop on Pan-Genomics. She is the recipient of the ESA 2016 Best Paper Award and has led the development of widely used bioinformatics tools such as MONI, MEGARes, AMRPlusPlus, METAMarc, Kohdista, Vari, and VariMerge.  Her research program is highly interdisciplinary, bringing together collaborators in microbiology, veterinary medicine, epidemiology, public health, and clinical sciences. Her work is supported by the National Institutes of Health, the National Science Foundation, and the U.S. Department of Agriculture. Dr. Boucher has served as Program Committee Chair for several international conferences, including WABI 2022, SPIRE 2020, RECOMB-SEQ 2019, and ACM-BCB 2018. She has been a Standing Member of the NIH Biodata Management and Analysis (BDMA) Study Section since 2021 and is a member of AAAS and ACM and a Senior Member of IEEE.

Hosted by: Emmalia Lutz,  exr123@psu.edu

Structured and Scalable AI for Dynamic Biological Systems

Friday, April 10, 2026; 10:00am
W375 Westgate Building
Speaker: Dr. Yijie Wang from Indiana University-Bloomington

Yijie Wang is an Associate Professor in the Department of Computer Science at Indiana University Bloomington, where he has been on the faculty since 2019. His research develops foundational AI and machine learning methods for modeling complex, high-dimensional biological systems. He focuses on interpretable, structured learning through sparsity, advancing algorithmic approaches to uncover gene regulatory mechanisms. His work bridges AI, applied mathematics, and biomedical sciences, with translational applications in AI-driven drug discovery. He is the recipient of the NIH MIRA (R35) Award in 2022 and an NIA R01 grant in 2026.

Hosted by: Emmalia Lutz,  exr123@psu.edu

Designing Soft Materials to Study Impact Mitigation

Wednesday, April 8, 2026; 121 Earth & Engineering Science Building
3:35-4:25 p.m.
Speaker: Edwin P. Chan from Mechanics of Polymers & Interfaces at MSED, NIST

An impact, defined as a high-force or blast event experienced by a target over a short duration, should be avoided whenever possible. When unavoidable, its severity can be lessened using lightweight, protective systems made from soft materials. My research team aims to develop measurements to answer these questions: What material properties make soft materials impact-resistant and protective, and how can we design better materials?

In this talk, we introduce new microballistic measurement methods to address these questions. First, we demonstrate that combining microballistic testing with mechanochemistry enables the direct measurement of molecular-scale deformation within a maleimide-anthracene-functionalized polystyrene-polyisobutylene block copolymer, thereby capturing the material's response. The shear wave speed of the elastomer is measured directly from the mechanochemically activated subsurface volume, with results validated through simulations, theory, and acoustic measurements. Next, we gain further insights into extreme rate impacts by combining micro- and macro-ballistic experiments with molecular dynamics simulations, revealing similar mechanical behavior of a polystyrene-polyisobutylene star block copolymer across different energy and size scales. Similarly, the shear wave speed of the elastomer is directly measured in these studies. Importantly, both simulation and experimental results highlight the critical role of shear wave speed in determining the extent of impact energy dissipation in these soft materials.

Edwin Chan is the Project Leader of the Fundamentals of Polymer Mechanics Project in the NIST Materials Science and Engineering Division. He leads a research team that studies the elastodynamics of impact-mitigating materials and the interfacial mechanics of polymer interfaces.

Edwin earned a B.S. in Materials Science and Engineering from the Pennsylvania State University in 2000, an M.S. in Materials Science and Engineering from the Massachusetts Institute of Technology in 2003, and a Ph.D. in Polymer Science and Engineering from the University of Massachusetts Amherst in 2007. His Ph.D. research was on the adhesion and mechanics of structured soft elastomers. Before joining the technical sta?, Edwin was a National Research Council Postdoctoral fellow in the Polymers Division at NIST (2008-2011).

Edwin is the recipient of the 2024 NIST Bronze Medal Award, the 2022 Arthur S. Flemming Award, the 2022 US National Academy of Science Kavli Frontiers of Science Fellow, and the 2019 American Chemical Society Polymeric Materials: Science and Engineering Division Cooperative Research Award. He was awarded the Presidential Early Career Award for Scientists and Engineers (PECASE) in 2016. He was selected to participate in the National Academy of Engineering (NAE) organized German American Frontiers of Engineering in Potsdam, Germany, in 2015. He is also a recipient of the 2013 Adhesion Society Young Scientist Award. He has over 60 publications, three book chapters, and seven patents.

Hosted by: Lana Fulton,  lub18@psu.edu

Aerospace Engineering Seminar Series: Ryan Russell

Thursday, April 16, 2026; 3:00pm-4:00pm
028 ECoRE
Speaker: Ryan Russell from The University of Texas at Austin

Hosted by: Jessica Chhan,  jmc7050@psu.edu

Glycerol-Derived Solvent Platforms for Lignin-First Biorefining toward Functional Aromatic Streams

Thursday, April 16, 2026; 10:35am
Capone Learning Auditorium (CBEB 001)
Speaker: James Sheehan from University of Alabama

Lignin, which constitutes 20–30 wt% of forestry and agricultural residues, represents the largest renewable source of aromatic carbon on the planet. Unlike conventional petrochemical aromatic streams dominated by benzene, toluene, and xylenes, lignin-derived aromatics intrinsically contain oxygenated functional groups that open pathways to higher-value applications in fine chemicals, flavorants, pharmaceuticals, and advanced materials. Harnessing this potential requires solvent systems that can both access and selectively deconstruct lignin’s complex polymeric architecture under practical processing conditions. This presentation highlights recent advances in glycerol-derived ethers (GDEs) as versatile solvent platforms for lignin-first biorefining. These solvents—prepared by etherifying the glycerol scaffold—offer a unique combination of high boiling points, dramatically reduced viscosities, and tunable polarity, enabling efficient lignin solvation and extraction under mild thermochemical conditions. Case studies will demonstrate how GDEs facilitate both organosolv delignification and, when used as hydrogen-donor media, enable transfer-hydrogenolysis pathways that convert lignin into streams of functionalized aromatic monomers without the need for high-pressure hydrogen. Together, these examples illustrate how rational solvent engineering can address long-standing challenges in lignin valorization. The talk will conclude by benchmarking glycerol-derived solvent systems within the broader landscape of lignin-first biorefining technologies using green chemistry metrics. This quantitative perspective will highlight key technical bottlenecks, opportunities for innovation, and future research directions critical for advancing lignin-derived aromatics as a foundation of sustainable chemical manufacturing.

Hosted by: Angela Dixon,  adc12@psu.edu

Boiled Frog or Adaptive Leader?

Wednesday, April 15, 2026; 121 Earth & Engineering Science Building
3:35-4:25 p.m.
Speaker: Susan O. Schall from Founder and Operations Leader of SOS Consulting LLC

Change continues to occur at an ever-increasing rate around us and our organizations. We can either remain in the boiling plan of change or become an adaptive leader that leads our organizations out. This presentation will define adaptive leadership and share a three-step process for leading your organization into the future.

Learning outcomes:

• Know the situations that require adaptive leadership.

• Know the characteristics of adaptive leaders.

• Know the three-step process for adaptively leading your organization.

• Understand adaptive leadership through a higher education case study.

• How to develop the leadership skills while at Penn State.

Over 30 years of experience delivering results using statistical process improvement and organizational health methods. Clients include manufacturing, higher education, and nonprofits.

PhD, Industrial Engineering, Penn State1988

MS, Industrial Engineering, Penn State, 1986

BS, Industrial Engineering, Penn State, 1982

Hosted by: Lana Fulton,  lub18@psu.edu

Aerospace Engineering Seminar Series: Carlos Cesnik

Thursday, April 23, 2026; 3:00pm-4:00pm
028 ECoRE
Speaker: Carlos Cesnik from University of Michigan

Hosted by: Jessica Chhan,  jmc7050@psu.edu

TBD

Thursday, April 23, 2026; 10:35am
Capone Learning Auditorium (CBEB 001)
Speaker: Miguel Modestino from TBD

TBD

Hosted by: Angela Dixon,  adc12@psu.edu

Beyond Equilibrium: Modeling Structurally and Chemically Complex Materials via Energy Landscape Navigation

Wednesday, April 22, 2026; 121 Earth & Engineering Science Building
3:35-4:25 p.m.
Speaker: Yue Fan from Mechanical Engineering at University of Michigan

This seminar highlights the unique capability of energy landscape-based modeling to provide a fundamental, predictive understanding of the behavior of non-equilibrium materials with significant structural and chemical complexity. I will present two case studies illustrating how this modeling approach can reveal insights that are inaccessible to conventional methods.

First, I will discuss metallic glasses — a disordered and inherently non-equilibrium metastable material system. Due to the lack of long-range order, building a valid structure-property relationship in glasses has been a longstanding challenge. I will show that by scrutinizing atomic reconfiguration processes—in particular the competition between elementary activations (up-hill climbing) and relaxations (down-hill dropping) on the energy landscape—a self-consistent equation can be derived to describe the time evolution of these disordered materials under various conditions. This, in turn, allows for the explanation and prediction of many critical phenomena in glassy systems—such as the aging/rejuvenation crossover and thermo-mechanical hysteresis—without relying on too many empirical assumptions or fitting parameters adopted in classical models.

Second, I will show that even in structurally ordered crystalline materials, non-equilibrium processing can induce chemical complexity that modifies the energy landscape in ways that significantly deviate from the classical linear-tilting picture. Using Al-Si-Mg alloys as an example, we integrated realistic energy landscape sampling of various local chemical environments with machine learning and a kinetic Monte Carlo (kMC) framework. This combined approach uncovered new microstructural evolution pathways—specifically, the formation of non-conventional nanoscale precipitates—that are observed in advanced manufacturing experiments (e.g. selective laser melting, high-pressure die casting) but are missed by conventional kMC models.

Yue Fan is currently an Associate Professor at University of Michigan, Ann Arbor. He received his Ph.D. degree from MIT in 2013, and then worked at Oak Ridge National Lab as a Eugene P. Wigner Fellow from 2013 to 2016. His primary research interest is to provide a substantive knowledge on mechanics and microstructural evolution in complex systems via predictive modeling, and thus facilitate the development of new science-based high performance materials with novel functions and unprecedented strength, durability, and resistance to traditional degradation and failure. Some honors and recognitions he has received include “TMS-JIMM International Scholar”, “TMS MPMD Young Leaders Professional Development Award”, “NSF Career Award”, “Ralph E. Powe Junior Faculty Enhancement Award” (by ORAU), and “Haythornthwaite Young Investigator Award” (by ASME-Applied Mechanics Division).

Hosted by: Lana Fulton,  lub18@psu.edu