OSCAR Celebration of Student Scholarship and Impact
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College of Science Honors College OSCAR

Behavioural Analysis of Asian Elephants at Smithsonian National Zoo

Author(s): Gwendolyne Fields

Mentor(s): David Luther, College of Science

Asian elephants (Elephas maximus) are classified as endangered species by the IUCN, facing major threats of habitat loss and human-elephant conflicts. With one-third of their population in a human-care setting, research among these environments is important to enable the species’ survival and hopeful reintroduction to the wild. The Smithsonian National Zoo houses seven Asian elephants: six females, Kamala, Bozie, Maharani, Swarna, Trong Nhi and Nhi Linh and one male, Spike. The newest addition to the herd, Trong Nhi and her daughter Nhi Linh arrived from the Rotterdam Zoo in November. To help them adapt to their environment and new herd, I observed and categorized their behaviors through video recordings on the ZooMonitor camera system. I observed 15 hours of video footage, with behaviors marked on an ethogram every four minutes that passed during the observation time. Specifically, Trong Nhi demonstrated stress behaviors, which we investigated when and why this was occurring. Preliminary results indicated that Trong Nhi demonstrated the stress behavior “head bob” before 12:00pm. Although some hours were collected on focusing between the hours 6:30-12:30 pm, there was insufficient data to determine the significance of why it occurred. Future studies will assess the environment around Trong Nhi leading up to the stress behavior which will help better care for her. This can also help the animal team determine when to attempt for Spike and Trong Nhi or Nhi Linh to mate which would be an important step in the conservation of the species.
Hi my name is Gwendolyne Fields and you’re joining me here today at Smithsonian’s National Zoo, currently at the Elephant Barn House.

You can join me inside to meet some of the elephants. Here we have Nhi Linh and Trong Nhi, mother and daughter, 19 years old and 9 years old. For my OSCAR Research project, I focused on them and their behaviour.

To tell you more about the elephants here at Smithsonian’s National Zoo, we have seven elephants. So we have six females and one male, Spike. Our other females along with Trong Nhi and Nhi Lhin are Kamala, Rani or Maharani, we also have Swarna and Bozie. These girls came to us in November and they are from Rotterdam Zoo in the Netherlands. And that’s why I focused on them because we do not know much about their behaviours and it was really important for us to better their care if we understood more about their behaviours themselves.

So to talk more about my research project, I ended up focusing on the stress behaviour that Trong Nhi was showing. She basically would raise her head up and do a big yawn or bob her head. So we wanted to look more into that and see why that was occurring and when it was happening. So we did a preliminary research portion where we looking at video footages for a day and split it between two hours within different parts of the day to see what time of day would she maybe show this behaviour.

So to give you an idea about what the day is like working with the animal keepers. We start off our day feeding the elephants at 6:30 in the morning and then we start cleaning the enclosures, meaning picking up poop and cleaning drinkers, as you can see in this video. The animal keepers do their health checks on the elephants to make sure there are no injuries and they all seem in good condition. Once we have our lunch break, we feed them again with bamboos and green vegetables and fill up on their hay. This is what I help with once a week, on top of doing my research project.

So as you can see here, this is a video of Trong Nhi and Nhi Lihn first meeting Spike. One of the reasons that the girls came to the Zoo here is to eventually get them to mate with Spike. Further along the research, the behaviours seen with other members of the herd, including Spike would be very beneficial.

The data of Trong Nhi and Nhi Lhin were collected through an ethogram, essentially a spreadsheet of the different behaviors that were observed for the elephants. When doing the video footage, I used the ZooMonitor Camera System and was able to view footages of the elephants for up to 2 months in the past.

With the time I had during the semester on top of going to the zoo once a week, I was only able to look through 15 hours of footage during two days. This obviously was not enough to establish a real connection between the stress behavior that Trong Nhi was demonstrating and what was causing it, but we did notice that Trong Nhi demonstrated her stress behavior during earlier parts of the day, before 12:00 pm.

Overall, we have a better idea of when we should maybe pay more attention to this stress behavior and have the team come up with a solution to better her care. Thank you for watching, I hope you guys enjoyed your day at the zoo with the Elephants at Smithsonian.

Categories
College of Engineering and Computing OSCAR

Modeling the relationship between regulated and unregulated disinfectant-by-products (DBPs) and other difficult-to-measure DBP classes

Author(s): Isaac Amouzou

Mentor(s): Ben Seiyon Lee, Department of Statistics

Disinfectant byproducts or DBPs for short are chemical compounds that form when disinfectants in water (ex: chlorine) react with natural organic matter. Chronic DBP exposure can cause significant negative health effects, such as bladder cancer, colon cancer, and pregnancy complications. DBP exposure is difficult to measure so a surrogate is needed to model DBP exposure. The surrogate often used is Trihalomethanes (THMs) but THMs have previously been shown to not be proportional to other DBPs that drive toxicity. This study developed statistical models to evaluate the relationship of a wide array of co-occurring DBPs with other more difficult-to-measure classes of DBPs (haloacetic acids-5 (HAA5), haloacetic acids-6 (HAA6), haloacetonitriles (HANs), and haloketones (HKs)) from a dataset containing over 13,000 measurements from 295 different public water systems. Using feature selection methods such as Lasso regression, this study found that linear mixed models hierarchically grouped by public water systems that took into account combinations of DBPs such as trichloromethane (TCM), trichloroacetaldehyde (TCAL), and trichlorophenol (TCP) (among other DBPs) along with categorical variables like the type of source water, season, disinfectant sequence, and sample location could explain as high as ~95% of the variance in some of the DBP classes. These models show that when considering the water treatment plant and key categorical variables the concentrations of unregulated and hard-to-measure DBPs can be properly modeled with easier-to-measure DBPs.
Hello, I am Isaac Amouzou, and I will be presenting my OSCAR URSP research, Modeling the relationship between regulated and unregulated disinfectant-by-products (DBPs) and other difficult-to-measure DBP classes.

What are DBPs?
Disinfectant byproducts or DBPs for short are chemical compounds that form when disinfectants in water react with natural organic matter.
Chronic DBP exposure can cause significant negative health effects, such as bladder cancer, colon cancer, and pregnancy complications.
A person can be exposed to DBPs through highly disinfected water sources, for example, chlorine interacting with organic matter in water. To ensure drinking water safety, it is imperative that DBP levels in public water sources be properly monitored.

Unfortunately, DBP exposure is difficult to measure directly. Instead, epidemiologists have been using Trihalomethanes or THMs, which are easier to measure, as a surrogate for DBP exposure. This was because it was believed that THM concentrations are proportional to concentrations of other DBP classes.
A previous study examined the link between THMs and a DBP class Haloacetonitrile or HANs using over 9500 measurements from 248 public water systems. This study found that THMs could only explain 30% of the variance in HAN concentrations.

For the project, we wanted to create a statistical framework to model the concentrations of hard-to-measure unregulated DBPs that drive toxicity using a wide array of co-occurring DBPs.
We also wanted to take into account the public water system (PWS) of origin for the measurements.

The data used is from the Information Collection Request database from the environmental protection agency or EPA. The dataset has more than 13,000 measurements from 295 public water systems.

For models, Linear mixed models or LMMs were used. LMMs are useful for data with high variability between groups. And in this specific case, the variability between public water systems can be considered.
LMMs allow estimation of the fixed effects (ex: DBP concentration or categorical variables) that can be measured while accounting for the variability among groups (ex: Public Water System) with random effects.

For variable selection, LASSO regression was used, which allows us to select important variables using a penalization approach with a tuning parameter, lambda.
as you can see on the top graph here as we increase lambda the coefficients tend towards 0
and in the bottom graph you can see how we select lambda, by running LASSO regression with multiple lambdas and measuring the mean squared error, which is a metric used to evaluate prediction accuracy.
We select all DBPs that have nonzero coefficients.

Multiple model structures were tested against the selected model structure (Full LMM)
The metrics used to evaluate models included AIC and BIC which are for comparing Goodness of fit (lower is better)
Conditional R-squared which measures the proportion of variance of the response explained by the model. (higher is better)
RMSE which is for comparing prediction accuracy.

We found that for four different DBP classes (haloacetic acids-5 haloacetic acids-6, haloacetonitriles, and haloketones), we can model a significant amount of the variance with a unique group of DBPs when we take into account the water system and key categorical variables.
In the upcoming summer, we plan to conduct an in-depth missing analysis of data and prepare new models for better estimation of the concentrations using the information gained from this model. We also further plan to develop a methodology to classify at-risk water treatment systems.

This is my work cited and thank you for listening to my presentation.

Categories
College of Humanities and Social Science OSCAR

‘Go F*** Yourself with Your Atomic Bomb’: Variegated Patriotism in the Principal Beat Works

Author(s): Aaron Aadahl

Mentor(s): Eric Eisner, English

This undergraduate senior thesis is a comparative study of patriotism in the key works of the 1950s Beat Generation. The essay argues that the writers are too frequently collated into a single ideology and that each demonstrated a unique perspective regarding their relationship to America. As such, I offer a taxonomic system that delimits their methods, foregrounding both distinctiveness and permeability while relying on Schatz et. al.’s paradigm of critical vs blind patriotism as a baseline. First, Lawrence Ferlinghetti’s poem “I am Waiting”nd selections from his novel Her provide a control for comparison by positing a critical patriotism I term to be a constructive critical approach. Next, I examine the three most famous Beat works: Allen Ginsberg’s poem Howl, Jack Kerouac’s travel narrative On the Road, and William S. Burroughs’ surreal sketch novel Naked Lunch. Ginsberg and Burroughs each practiced critical patriotism, offering two very different ways in which an individual can cope with or subvert America’s norms and institutions-defined here as the spiritual critical and individual radical approaches, respectively. Finally, Kerouac differed from his peers as the only writer to subscribe to blind patriotism. Though he had offered rare and brief criticism, his work is ultimately informed by his belief in American exceptionalism and his affinity for the 1930s-Kerouac’s patriotism utilized a nostalgic passive approach. Providing a more complex understanding of the Beat Generation’s relationship to America, this essay supports future scholarship of the Beats and beyond.
I. Hello, my project is titled “‘Go F Yourself with Your Atomic Bomb’: Variegated Patriotism in the Principal Beat Works.” It was written in Spring 2023 under the advisement of Dr Eric Eisner. My research was spurred by a statement I often read, applied to the beats in various forms, that would say something like “they were disillusioned with post-world War II America.” How, I wondered, could an entire generation with such a diverse literary output be encapsulated by a single understanding of their relationship to country? Utilizing some of the most popular works, I developed a taxonomy that delimits their unique approaches to patriotism while leaving room for overlap exception and nuance.
II. Drawing from the early works of Lawrence Ferlingetti, Allen Ginsberg, Jack Kerouac and William S Burroughs, I propose four unique approaches to patriotism in literature. In his 1958 poem “I am Waiting” Ferlinghetti practices an optimistic version of patriotism I term the constructive critical. Throughout the poem, he reimagines history in order to achieve a desired future. His “reconstructed Mayflower” suggests the country should have been founded for more than just white people. His “sweet desegregated chariot” suggests that it is not too late to change America’s ethos. The approach is critical because he’s clear-eyed about both past and present. It’s constructive because he is optimistic about the possibilities of future change.
III. Allen Ginsberg’s poem Howl posits a patriotism that I term the spiritual critical. He mythologizes America–imagines the country in terms of internal spiritual struggle of good versus evil. In this line he defines America by its economic system. The “who” of the first word, are he and the other Beats– what he calls “the best minds of his generation.” They struggle helplessly against being inundated by cigarettes– products of capitalism. They burn the cigarette holes in their arms in symbolic protest, but also, I suggest they use the physical pain to distract from the emotional and existential pain they feel the country is wrought upon them. Ginsberg is pessimistic about the Beats being able to win any ideological battle, but he finds catharsis in keeping record and indicting the evil that he sees.
IV. Jack Kerouac’s approach to America is the sole patriotism of the beats that I turn to be a critical or what’s sometimes called “blind patriotism.” In his own biography, he idealized the 1930s and espoused American exceptionalism– his writing reflects this in a mode that I call the nostalgic passive. In this passage from his travelogue On the Road, he’s willing to overlook the obvious unhealthiness of apple pie in what works as a metaphor for his own willingness to overlook the country’s flaws. To Kerouac, how can apple pie or America be bad for him when both provide him with opportunities for self-gratification? Nostalgic passivity, then, fails to critique America unless some aspect of the country negatively affects the practitioner personally and immediately.
V. Lastly, William S Burroughs’ disposition toward America exemplifies an approach I term the radical individual. Burroughs considered all existence to be determined by an invisible control paradigm. America and all other countries function as parts of that paradigm. In this line from Naked Lunch, Dr Benway’s description of an “arduous and intricate bureaucracy” mirrors Burroughs’ own feelings about America. To him, country is just another means of control. Acts of subversion using drugs, sex, or violence become patriotic because they temporarily reclaim control for the individual American. Like the spiritual critical, the radical individual concerns itself with temporary relief from an otherwise inescapably oppressive country. In conclusion, while it may be fair to say that all the Beats were disillusioned with America, it is more useful to examine how they differed in their concepts of what precisely constitutes America and the resulting relationships to that country.
VI. By creating a comparative system that recognizes these similarities and differences, I hope to contribute to the scholarly conversation in a meaningful way. Thank you.