Showing 311 - 320 of 583 Items
Improving Energy Efficiency through Compiler Optimizations
Date: 2021-01-01
Creator: Jack Beckitt-Marshall
Access: Open access
- Abstract--- Energy efficiency is becoming increasingly important for computation, especially in the context of the current climate crisis. The aim of this experiment was to see if the compiler could reduce energy usage without rewriting programs themselves. The experimental setup consisted of compiling programs using the Clang compiler using a set of compiler flags, and then measuring energy usage and execution time on an AMD Ryzen processor. Three experiments were performed: a random exploration of compiler flags, utilization of SIMD, as well as benchmarking real world applications. It was found that the compiler was able to reduce execution time, especially when optimizing for the specific architecture, to a degree that depends on the program being compiled. Faster execution time tended to correlate with reduced energy usage as well, further suggesting that optimizing programs for speed and architecture is the most effective way of decreasing their overall energy usage.
Instability in a Time-Modulated Lattice This record is embargoed.
- Embargo End Date: 2025-05-19
Date: 2022-01-01
Creator: Evelyn Wallace
Access: Embargoed
Assessing the Accuracy of Quantum Monte Carlo Pseudopotentials for CO2 Capture in Metal Organic Frameworks
Date: 2021-01-01
Creator: Chloe Renfro
Access: Open access
- As global emissions of CO2 and other greenhouse gases rises, global warming persists as an imminent threat to the environment and every day lives. To reduce greenhouse gas emissions in the atmosphere, there is a need to design materials to separate and capture the different gasses. Current gas capturing technologies lack efficiency and have extensive energy costs. A class of materials for CO2 capture is Molecular Organic Frameworks (MOFs). In order for a MOF to be efficient for this type of separation, the MOF needs to be able to selectively bind to the gas, while also not suffering a high energy cost to remove the gas and reuse the material. Computationally calculated binding energies are used to determine the usefulness of a MOF at capture and separation of a certain gas. Each computational method has its advantages and limitations. In this work, diffusion quantum Monte Carlo is being explored. This paper focuses on the accuracy of recently developed pseudopotentials for DMC use. These pseudopotentials have been tested on smaller molecules but have not been systematically tested for systems such as MOFs. Results from a DMC calculation of Zn-MOF-74 show a binding energy of -18.02 kJ/mol with an error bound of 16.74 kJ/mol. In order to assess the accuracy of the DMC results for binding energies of this magnitude the uncertainty need to be reduced, a subject of ongoing work.
Investigating the Effects of Mixed Solvents on the Excited State Proton Transfer Mechanisms of 8-Amino-2-naphthol This record is embargoed.
- Embargo End Date: 2027-05-19
Date: 2022-01-01
Creator: Alexander Avrom Kreines
Access: Embargoed
A Conscious Image of Liberation: Euskadi Ta Askatasuna (ETA) in the Late Franco Regime, Through the Lens of the Press
Date: 2022-01-01
Creator: Sebastian de Lasa
Access: Open access
- The rise of Euskadi Ta Askatasuna (ETA) in the early 1970s coincided with the rise of national liberation movements across Europe, which largely were inspired by notable examples of resistance throughout the Global South in the decades prior. ETA’s growth over this period, and in the years prior, was heavily dependent on the image created of the organziation in the local, domestic, and international press, including through documents distributed by the group itself. By comparing ETA’s external presence to the group’s internal strife, it becomes clear that ETA made efforts to align itself with the popular revolutionary language of the period. The group took advantage of, and aimed to create press spectacles, in attempts to manipulate its public image. However, the discrepancy between the group’s public image and internal dissolution became apparent as the group pursued more violent acts in the goal of Basque liberation.
Identification of MPKs Involved in the Wall Associated Kinase Regulated Stress Response in Arabidopsis thaliana Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2013-05-01
Creator: Patrick J Lariviere
Access: Access restricted to the Bowdoin Community
Characterizing Toll Receptors in the Mediterranean Cricket Access to this record is restricted to members of the Bowdoin community. Log in here to view.
- Restriction End Date: 2025-06-01
Date: 2022-01-01
Creator: Warsameh Bulhan
Access: Access restricted to the Bowdoin Community
Unraveling Paradise: Colonialism and Disguise in German Language Literature
Date: 2022-01-01
Creator: Brigita Kant
Access: Open access
- For centuries, the Pacific Islands have been disguised by Europeans through the trope of “island paradise." Despite Europe’s role in bringing colonization and racial oppression to Oceania, the dominant narrative has been that Pacific Islanders lead simple lives, untouched from the complicated aspects of the “modern world.” This narrative has enabled White outsiders to fantasize about the Pacific Islands as a place for personal denial of Western social conventions, simultaneously allowing White European men to fetishize and possess Pacific Island culture and identity. My honors project will closely examine three fictional German language texts- Haimotochare (1819), Der Papalagi (1920), and Imperium (2012)- centered around the exploration German colonial involvement in Pacific Islands. My analysis of these texts will allow for the understanding of how the false narrative of “island paradise” came to be, how it has been embraced and weaponized, and what it means for both German and Pacific Islander post-colonial identity.
Outlier Detection in Energy Datasets
Date: 2022-01-01
Creator: Stephen Crawford
Access: Open access
- In the past decade, numerous datasets have been released with the explicit goal of furthering non-intrusive load monitoring research (NILM). NILM is an energy measurement strategy that seeks to disaggregate building-scale loads. Disaggregation attempts to turn the energy consumption of a building into its constituent appliances. NILM algorithms require representative real-world measurements which has led institutions to publish and share their own datasets. NILM algorithms are designed, trained, and tested using the data presented in a small number of these NILM datasets. Many of the datasets contain arbitrarily selected devices. Likewise, the datasets themselves report aggregate load information from building(s) which are similarly selected arbitrarily. This raises the question of the representativeness of the datasets themselves as well as the algorithms based on their reports. One way to judge the representativeness of NILM datasets is to look for the presence of outliers in these datasets. This paper presents a novel method of identifying outlier devices from NILM datasets. With this identification process, it becomes possible to mitigate and measure the impact of outliers. This represents an important consideration to the long-term deployment of NILM algorithms.
"Possessive gentleness": Insecure Attachments in American Literature
Date: 2022-01-01
Creator: Ella Pearl Crabtree
Access: Open access
- “‘Possessive Gentleness’: Insecure Attachments in American Literature” applies psychological attachment theory to works of American Literature. Each novel examined—Uncle Tom’s Cabin (1851), Dred: A Tale of the Dismal Swamp (1856), and The Minister’s Wooing (1859) by Harriet Beecher Stowe, The Third Generation (1954) by Chester Himes, and The Bluest Eye (1970) by Toni Morrison—describes the forces behind insecure attachment relationships between child characters and their caregivers. The first chapter of this project focuses on Stowe’s anti-slavery novels. It argues that the institution of slavery is in conflict with Christianity in these works, because it impedes disinterestedly benevolent mothering and disrupts secure attachments. The second chapter analyzes The Third Generation, and suggests that colorism in the black community is the cause of insecure attachments in Himes’ work. The third and final chapter examines The Bluest Eye, and presents sympathy, as embodied by the novel’s narrator, as a potential remedy for insecure parent-child attachments. Together, these texts elucidate how societal forces (e.g. colorism, poverty) intrude upon the family structure and destabilize parent-child attachments. Optimistically, however, they also suggest that improved parent-child attachments might function as a vehicle of broader social change.