Physical Sciences and Mathematics Commons^™

Neutron Correlations In The Decay Of The First Excited State Of 11li, Jenna K. Smith, Thomas J. Baumann, Daniel Bazin, James Brown, Paul A. Deyoung, Nathan H. Frank, Michael D. Jones, Zack Kohley, Bryan A. Luther, B. S. Marks, Artemis Spyrou, Sharon L. Stephenson, Michael R. Thoennessen, Alexander S. Volya

Physics and Astronomy Faculty Publications

The decay of unbound excited ¹¹Li was measured after being populated by a two-proton removal from a ¹³B beam at 71 MeV/nucleon. Decay energy spectra and Jacobi plots were obtained from measurements of the momentum vectors of the ⁹Li fragment and neutrons. A resonance at an excitation energy of ∼1.2 MeV was observed. The kinematics of the decay are equally well fit by a simple dineutron-like model or a phase-space model that includes final state interactions. A sequential decay model can be excluded.

Life After Calculus: 20 Years Later, Darren B. Glass

Math Faculty Publications

In 1996 Math Horizons interviewed a group of students at the Joint Mathematics Meetings; now, 20 years later, one of those students, Darren Glass, interviews another group of students.

Hearing In The Juvenile Green Sea Turtle (Chelonia Mydas): A Comparison Of Underwater And Aerial Hearing Using Auditory Evoked Potentials, Wendy Dow Piniak, David A. Mann, Craig A. Harms, T. Todd Jones, Scott A. Eckert

Environmental Studies Faculty Publications

Sea turtles spend much of their life in aquatic environments, but critical portions of their life cycle, such as nesting and hatching, occur in terrestrial environments, suggesting that it may be important for them to detect sounds in both air and water. In this study we compared underwater and aerial hearing sensitivities in five juvenile green sea turtles (Chelonia mydas) by measuring auditory evoked potential responses to tone pip stimuli. Green sea turtles detected acoustic stimuli in both media, responding to underwater stimuli between 50 and 1600 Hz and aerial stimuli between 50 and 800 Hz, with maximum …

Evolution Of Network Architecture In A Granular Material Under Compression, Lia Papadopoulous, James G. Puckett, Karen E. Daniels, Danielle S. Bassett

Physics and Astronomy Faculty Publications

As a granular material is compressed, the particles and forces within the system arrange to form complex and heterogeneous collective structures. Force chains are a prime example of such structures, and are thought to constrain bulk properties such as mechanical stability and acoustic transmission. However, capturing and characterizing the evolving nature of the intrinsic inhomogeneity and mesoscale architecture of granular systems can be challenging. A growing body of work has shown that graph theoretic approaches may provide a useful foundation for tackling these problems. Here, we extend the current approaches by utilizing multilayer networks as a framework for directly quantifying …

Critical Groups Of Graphs With Dihedral Actions Ii, Darren B. Glass

Math Faculty Publications

In this paper we consider the critical group of finite connected graphs which admit harmonic actions by the dihedral group D_n, extending earlier work by the author and Criel Merino. In particular, we show that the critical group of such a graph can be decomposed in terms of the critical groups of the quotients of the graph by certain subgroups of the automorphism group. This is analogous to a theorem of Kani and Rosen which decomposes the Jacobians of algebraic curves with a D_n-action.

Commentary: Are National Parks Still Relevant?, Randall K. Wilson

Environmental Studies Faculty Publications

On the occasion of the National Parks centennial comes an irreverent question: Are the parks still relevant?

Famously christened as America's "best idea" by writer Wallace Stegner and reaffirmed in Ken Burns' 2009 PBS documentary, it seems brazen, if not blasphemous, to pose the question. [excerpt]

The Feasibility Of Using Drones To Count Songbirds, Andrew M. Wilson, Janine M. Barr, Megan E. Zagorski

Environmental Studies Student Conference Presentations

Point and transect counts are the most common bird survey methods, but are subject to biases and accessibility issues. To eliminate some of these biases, we propose attaching a recorder to a consumer-grade quadcopter (Unmanned Aerial Vehicle, or UAV) to estimate songbird populations from audio recordings. We conducted a blind experiment using broadcast recordings to estimate the detection radius of a compact recorder attached to a UAV, and found that the detection radius did not vary significantly when the UAV was flown at elevations of 20, 40 and 60m. We field tested our system by comparing UAV-based bird counts with …

Long-Range Acoustic Interactions In Insect Swarms: An Adaptive Gravity Model, Dan Gorbonos, Reuven Ianconescu, James G. Puckett, Rui Ni, Nicholas T. Ouellette, Nir S. Gov

Physics and Astronomy Faculty Publications

The collective motion of groups of animals emerges from the net effect of the interactions between individual members of the group. In many cases, such as birds, fish, or ungulates, these interactions are mediated by sensory stimuli that predominantly arise from nearby neighbors. But not all stimuli in animal groups are short range. Here, we consider mating swarms of midges, which are thought to interact primarily via long-range acoustic stimuli. We exploit the similarity in form between the decay of acoustic and gravitational sources to build a model for swarm behavior. By accounting for the adaptive nature of the midges' …

A Three-Fold Approach To The Heat Equation: Data, Modeling, Numerics, Kimberly R. Spayd, James G. Puckett

Math Faculty Publications

This article describes our modeling approach to teaching the one-dimensional heat (diffusion) equation in a one-semester undergraduate partial differential equations course. We constructed the apparatus for a demonstration of heat diffusion through a long, thin metal rod with prescribed temperatures at each end. The students observed the physical phenomenon, collected temperature data along the rod, then referenced the demonstration for purposes in and out of the classroom. Here, we discuss the experimental setup, how the demonstration informed practices in the classroom and a project based on the collected data, including analytical and computational components.

Back Half Of The Year, Ian R. Clarke

Physics and Astronomy Faculty Publications

Here we are in the back half of 2016, and the days are getting shorter. We have, as of today, lost 18 minutes since the solstice on June 20, and the speed of that change is quickening. You may wonder why it is that we have our hottest weather after our longest day is behind us. The simple answer is that it takes time for land and water masses to warm up. That’s the reason that Sept. 21 is likely to be a lot warmer than March 21, even though they have the same amount of daylight. [excerpt]

Monte Carlo Approaches To Parameterized Poker Squares, Todd W. Neller, Zuozhi Yang, Colin M. Messinger, Calin Anton, Karo Castro-Wunsch, William Maga, Steven Bogaerts, Robert Arrington, Clay Langely

Computer Science Faculty Publications

The paper summarized a variety of Monte Carlo approaches employed in the top three performing entries to the Parameterized Poker Squares NSG Challenge competition. In all cases AI players benefited from real-time machine learning and various Monte Carlo game-tree search techniques.

Living In The Milky Way, Ian R. Clarke

Physics and Astronomy Faculty Publications

It’s finally here. Today, June 20 at 6:34 p.m., is the the summer solstice, also known as the first day of summer and, confusingly enough, midsummer’s eve. From a scientific perspective, it marks the moment the sun reaches its northernmost point in our sky. As a result of that position, it’s the shortest night and longest day if you live north of the equator. [excerpt]

The Power Of X, Darren B. Glass

Math Faculty Publications

In his recent book, The Math Myth: And Other STEM Delusions, political scientist Andrew Hacker argues, among other things, that we should not require high school students to take algebra.

Part of his argument, based on data some have questioned, is that algebra courses are a major contributor to students dropping out of high school. He also argues that algebra is nothing more than an "enigmatic orbit of abstractions" that most people will never use in their jobs. [excerpt]

Let's Nurture Science, Math Talent, Darren B. Glass

Math Faculty Publications

I recently saw the film The Man Who Knew Infinity, which was released in many American cities this weekend, and was struck by the beautiful telling of an inspirational story. The film, which stars Jeremy Irons and Dev Patel, is a biography of the mathematician Srinivasa Ramanujan, who was born in India at the end of the 19th century. [excerpt]

Now Hear This! Orientation And Behavioral Responses Of Hatchling Loggerhead Sea Turtles, Caretta Caretta, To Environmental Acoustic Cues, Bethany Holtz

Celebration

Although the visual and geologic orientation cues utilized by sea turtle hatchlings during seafinding, when they move from the nest to the sea after hatching, have been well studied, the potential for auditory stimuli to act as an orientation cue has not been well explored. Over the past several decades our knowledge of the auditory capacity of sea turtles has increased greatly, yet little is known about the biological significance of this sensory ability. To investigate whether hatchlings can use ocean sounds during seafinding, we measured the behavioral responses of hatchling loggerhead sea turtles (Caretta caretta) collected from nesting beaches …

Crafting A Campus Sustainability Action Plan: A Grassroots Approach, Jolina A. Kenney

Celebration

In recent decades, colleges and universities have taken a leadership role in developing institution-based Sustainability Action Plans (SAPs). A SAP includes a summation of past achievements, current initiatives, and the prioritized goals and implementation strategies for future action in terms of promoting environmental sustainability. These plans can also serve as pedagogical devices that teach students, staff and faculty important lessons of intentional living, global citizenship, and environmental responsibility. While many plans are adopted as top-down initiatives, there is great value in finding ways to engage the entire campus community in such endeavors at the grassroots level. This project documents a …

Fearless Friday: Laila Mufty, Laila M. Mufty

SURGE

In today’s Fearless Friday, Surge would like to honor the work of Laila Mufty ‘18. Laila is a sophomore from the Bay Area in California and is majoring in Environmental Studies. Currently, she is one of the CPS Program Coordinators with Big Brothers Big Sisters and is the Immersion Project Leader for the New Orleans trip in May focused on the rebuilding of the Gulf Coast. In addition to her work with CPS, Laila participates in multiple cultural organizations on campus and has volunteered with El Centro, Painted Turtle Farm and Casa de la Cultura. Laila has also written and …

Friends Of Musselman Library Newsletter Spring 2016, Musselman Library

Friends of Musselman Library Newsletter

From the Dean (Robin Wagner)

Library Receives 9/11 Commission Papers (Fred Fielding '16)

Library News

Digital Scholarship Fellows

From Paupers to Presidents

Fair Use Week

Reading About Race

Student Workers Save the Day (Nadia Romero Nardelli '19)

Life in the Fishbowl (Brittany Barry '17)

In Memory of Douglas R. Price; Former Aide to Eisenhower

Special Purchases

From the Piano Bench (Jay P. Brown ’51, Doug Brouder ’83, Julie Caterson ’84 and Mr. & Mrs. Michael Fiery)

Research Reflections: The Spirit of Gettysburg (Timothy Sestrick)

Gift of Art

Old Gettysburg Back to Thee (Jenna Fleming '16, Avery Fox '16, Melanie Fernandes …

Crafting A Campus Sustainability Action Plan: A Grassroots Approach, Jolina A. Kenney

Student Publications

In recent decades, colleges and universities have taken a leadership role in developing institution-based Sustainability Action Plans (SAPs). A SAP includes a summation of past achievements, current initiatives, and the prioritized goals and implementation strategies for future action in terms of promoting environmental sustainability. These plans can also serve as pedagogical devices that teach students, staff and faculty important lessons of intentional living, global citizenship, and environmental responsibility. While many plans are adopted as top-down initiatives, there is great value in finding ways to engage the entire campus community in such endeavors at the grassroots level. This project documents a …

The Parallelization And Optimization Of The N-Body Problem Using Openmp And Openmpi, Nicholas J. Carugati

Student Publications

The focus of this research is exploring the efficient ways we can implement the NBody problem. The N-Body problem, in the field of physics, is a problem in which predicts or simulates the movements of planets and how they interact with each other gravitationally. For this research, we are viewing if the simulation can execute efficiently by delegating the heavy computational work through different cores of a CPU. The approach that is being used to figure this out is by integrating the parallelization API OpenMP and the message-passing library OpenMPI into the code. Rather than all the code executing on …

Fracking In Pennsylvania: A Spatial Analysis Of Impacts On Land Cover And Land Use, The Viewshed, And The Audioshed, Kelly A. Collins

Student Publications

Hydraulic fracturing is the process of extracting natural gas from layers of shale rock beneath the surface of the Earth. The largest source of natural gas in the US is the Marcellus Shale, largely located in Pennsylvania, and it is believed to hold about 141 trillion cubic feet of natural gas in its shale deposits. My study examined the impacts of well sites on land cover and land use, the viewshed, and the audioshed. To study the effect of wellpads on land use and land cover, we overlaid a layer of wellpads over land cover data as well as a …

Search For 4n Contributions In The Reaction 14be(Ch2,X)10he, Michael D. Jones, Zack Kohley, Thomas J. Baumann, Greg Christian, Paul A. Deyoung, Joseph E. Finck, Nathan H. Frank, Robert A. Haring-Kaye, A. N. Kuchera, Bryan A. Luther, Shea Mosby, Jenna K. Smith, J. Snyder, Artemis Spyrou, Sharon L. Stephenson, Michael R. Thoennessen

Physics and Astronomy Faculty Publications

A previously published measurement of the ground state resonance of ¹⁰He, populated by a reaction of a 59 MeV/u ¹⁴Be beam on a deuterated polyethylene target, was further analyzed to search for ⁴n emission resulting from 2p removal. No evidence for 4n events was found. A lower limit of about 1 MeV was determined for a possible resonance in ¹²He.

Cyclic Critical Groups Of Graphs, Ryan P. Becker, Darren B. Glass

Math Faculty Publications

In this note, we describe a construction that leads to families of graphs whose critical groups are cyclic. For some of these families we are able to give a formula for the number of spanning trees of the graph, which then determines the group exactly.

How The Federal Government Went From Realtor To Landlord In The American West, Randall K. Wilson

Environmental Studies Faculty Publications

Disputes over public land rights have a long history in the United States. But the past 18 months have seen a growing number of confrontations over Western federal lands, culminating in the current standoff at the Malheur National Wildlife Refuge in Oregon. [excerpt]

Ai Education: Birds Of A Feather, Todd W. Neller

Computer Science Faculty Publications

Games are beautifully crafted microworlds that invite players to explore complex terrains that spring into existence from even simple rules. As AI educators, games can offer fun ways of teaching important concepts and techniques. Just as Martin Gardner employed games and puzzles to engage both amateurs and professionals in the pursuit of Mathematics, a well-chosen game or puzzle can provide a catalyst for AI learning and research. [excerpt]

Feeling And Healing Eco-Social Catastrophe: The "Horrific" Slipstream Of Danis Goulet's Wakening, Salma Monani

Environmental Studies Faculty Publications

Cree/Métis filmmaker Danis Goulet’s science fiction short Wakening (2013) is set in Canada’s near future, yet the film reveals a slipstream of time where viewers are invited to contemplate the horrors of ecosocial crises—future, past, and present. I argue Wakening, as futuristic ecohorror, produces horrific feelings in the moment of its viewing that are inevitably entangled with the past, inviting its audiences to experience the monstrous contexts of Indigenous lives across time. To articulate this temporal dynamism, I overlay two key conceptual understandings: Walter Benjamin’s critiques of Western progress and historicism, and Indigenous notions of a Native slipstream. When brought …

In God’S Land: Cinematic Affect, Animation And The Perceptual Dilemmas Of Slow Violence, Salma Monani

Environmental Studies Faculty Publications

In this paper, I argue that Indian independent filmmaker Pankaj Rishi Kumar's documentary In God’s Land (2012) blends animation and live-action to illuminate the destructive nuances of postcolonial literary scholar, Rob Nixon's notion of slow violence. In turning to cinema, I also suggest that In God’s Land’s “aesthetic strategies” further eco-film scholarship’s recent interests in animation, which have tended to highlight the mode's "feel good affect." I draw attention to In God's Land's hybrid of dark, discordant animation spectacle interspliced in the documentary live-action to articulate the potential of eco-animation outside of this affect. Ultimately, the film not only draws …