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Articles 1 - 30 of 190

Full-Text Articles in Physical Sciences and Mathematics

Cybersecurity Policy Rubric And Analysis For The State Of Maine Electrical Transmission Grid, Benjamin Plummer M.S. Oct 2023

Cybersecurity Policy Rubric And Analysis For The State Of Maine Electrical Transmission Grid, Benjamin Plummer M.S.

All Student Scholarship

The State of Maine’s (SOM) electrical grid is aging. While there are public and private efforts to bring it up to date, gaps in cybersecurity policies and laws exist (NERC, n.d.; see also MPUC, n.d.; CISA, n.d.). This policy and law research may also apply to other states and the protection of their critical infrastructure. The researcher examined the grid’s controls, policies, and laws to determine the influence each exerts over the grid and where that influence presents vulnerabilities in security. The research focused on the controls, policies, and laws that play a role in protecting the grid. The researcher …


A Northeast Safe And Thriving For All, Linda Shi, Vanessa Levesque Oct 2023

A Northeast Safe And Thriving For All, Linda Shi, Vanessa Levesque

Faculty and Staff Scholarship

Final Report to NOAA Climate Program Office Climate Adaptation Partnerships Planning Grant


Utilizing Few-Shot Meta Learning Algorithms For Medical Image Segmentation, Nick Littlefield Jun 2023

Utilizing Few-Shot Meta Learning Algorithms For Medical Image Segmentation, Nick Littlefield

Thinking Matters Symposium

Deep learning models can be difficult to train because they require large amounts of data, which we usually do not have or are too expensive to get or annotate. To overcome this problem, we can use few-shot meta-learning, which allows us to train deep learning models with little data. Using a few examples, meta-learning, or learning-to-learn, aims to use the experience learned during training to generalize to unknown tasks. Medical imaging is an industry where it is particularly useful, as there is limited publicly available data due to patient privacy concerns and annotating costs.

This project examines how meta-learning performs …


Analysis Of Maine’S Coastal Water And Soil Solidity, Corbin Glover Jun 2023

Analysis Of Maine’S Coastal Water And Soil Solidity, Corbin Glover

Thinking Matters Symposium

Much of the agriculture conducted in Maine is done near the southeastern coast. This situates many of Maine’s farms in an ecoregion called a ‘brackish tidal marsh,’ containing brackish water. Brackish water can then result in an increasing salinity content for the surrounding agricultural soil, causing complications for crop growth. This proof-of-concept project focuses on identifying the gradient levels of salinity, or EC (Electric Conductivity), contained within a small region of Casco bay. This project's data were collected from the Androscoggin River bordering Brunswick and Bath, Maine. Along this river, three plots were selected in order to gauge the longer …


To Adopt Blockchain Technology Or Not: Is The Decision-Making Process Immune To Covid-19?, Rebecca Jauch Apr 2022

To Adopt Blockchain Technology Or Not: Is The Decision-Making Process Immune To Covid-19?, Rebecca Jauch

Thinking Matters Symposium

Blockchain technology has been shown to have advantages in improving the effectiveness of supply chain management. We use the Technology-Organization-Environment (TOE) framework with Threat-Rigidity Theory (TRT) to determine the factors that lead U.S. businesses to adopt blockchain technology, the factors that act as barriers to adoption, and the disruptive effect of COVID-19 on the rate of blockchain adoption


The Effects Of Paclitaxel On Cellular Migration And The Cytoskeleton, Ashley Salguero-Gonzalez Apr 2022

The Effects Of Paclitaxel On Cellular Migration And The Cytoskeleton, Ashley Salguero-Gonzalez

Thinking Matters Symposium

In a clinical setting, some patients are exposed to an anti-cancer chemotherapy agent, paclitaxel. Cancerous cells undergo rapid, continuous cell division without control. Chemotherapy treatments try to slow and stop the uncontrollable cell division cycles and eliminate cancerous cells in the process. Paclitaxel serves as a treatment for some types of cancers, including lung, melanoma, bladder, and esophageal. Because it targets the cytoskeleton, paclitaxel can also influence cell migration. This project utilizes a cellular migration assay and an immunohistochemistry assay to analyze the effects of paclitaxel on the movement of cells and on the cytoskeleton of neuroglia rat cells with …


How Risk-Related Statistics, As Reported In News And Social Media, Are Linked To The Use Of The Public Transit System, Prashiddhi Pokhrel Apr 2021

How Risk-Related Statistics, As Reported In News And Social Media, Are Linked To The Use Of The Public Transit System, Prashiddhi Pokhrel

Thinking Matters Symposium

Due to the pandemic, people have started relying more on televisions, news, social media, and other news outlets for guidance. Moreover, with the increasing amount of news, data, and information there is also an increase in the amount of misleading statistics. People’s opinions and decisions significantly depend on the data, statistics, and information that they are exposed to, as well as their sources. For this project, we want to look at how information and its sources are affecting the decision made by the general public for the usage of the Portland Transit System. It is very important to know why …


Media Analysis Of Coverage Of Environmental Issues In The Midst Of A Pandemic, Alexandria N. Miller, Lucia A. Bolles Apr 2021

Media Analysis Of Coverage Of Environmental Issues In The Midst Of A Pandemic, Alexandria N. Miller, Lucia A. Bolles

Thinking Matters Symposium

This research aimed to answer the question “has the coronavirus impacted the print media’s coverage of important environmental issues?” The research analyzed 2 different print newspapers - The New York Times and the Wall Street Journal - to determine if there was a change in coverage of environmental news as the coronavirus spread in the US. Data for stories published in the first four days of every month from March through September was compiled for 2019 and 2020. Our findings showed a 78.85% decrease in coverage of environmental issues between 2019 and 2020 when stories related to the coronavirus pandemic …


Consumer Food Waste Behaviors In Relation To Open Date Label Misinterpretation, Daniel Hutchings, Elisabeth Seliga, Anya O'Meara, Anna Blank Apr 2021

Consumer Food Waste Behaviors In Relation To Open Date Label Misinterpretation, Daniel Hutchings, Elisabeth Seliga, Anya O'Meara, Anna Blank

Thinking Matters Symposium

In the United States, the legal framework for product date labeling is minimal and varies across states. Manufacturers have the discretion to use any date label that they deem appropriate, and this lack of uniformity leaves room for misinterpretation by both retailers and consumers. Previous studies have examined consumer misinterpretation of date labels and how this lack of knowledge correlates to food waste behaviors. This study was aimed at understanding how consumers apply their knowledge about date labels to make decisions about purchasing and discarding food. The research was conducted via an intercept survey outside of a grocery store to …


App Development For Wearable Sensors, Connor Pittman, Christopher Chappie, Patrick A. Tetreault Apr 2021

App Development For Wearable Sensors, Connor Pittman, Christopher Chappie, Patrick A. Tetreault

Thinking Matters Symposium

The objective of this research project was to create a wearable device that monitors bodily functions for the user to view on their smartphone. Sensor data is processed using the Arduino Nano 33 BLE microcontroller. The sensors used in this project include: proximity, temperature, humidity, heart rate, pressure, and skin impedance. This project takes advantage of the Arduino's Bluetooth low energy (BLE) capabilities so that all the data can be transmitted to a smartphone. This presentation shows the challenges faced during the project and how they were overcome. Some of these challenges include: programming, how heart rate sensors work, and …


Wildlife Trade And Covid-19: Towards A Criminology Of Anthropogenic Pathogen Spillover, Piers Beirne Phd Dec 2020

Wildlife Trade And Covid-19: Towards A Criminology Of Anthropogenic Pathogen Spillover, Piers Beirne Phd

Department of Criminology

The general remit of this paper is the role of wildlife trade in pathogen spillover. Its underlying assumption is that, so far from being the exclusive domain of the life sciences, the study of pathogen spillover will be greatly enhanced by multi-perspectival approaches, including One Health and those employed here, namely, non-speciesist green criminology and critical animal studies. The paper moves from discussions of zoonosis, anthroponosis and wildlife trade to the emergence of COVID-19 in Wuhan, China. The paper recommends the abolition of all wildlife trade and the reclamation of wildlife habitat and broaches discussion of the extension of legal …


Snowshoe Hares (Lepus Americanus) Alter Feeding Behavior In Response To Coyote (Canis Latrans) And Moose (Alces Alces) Cues At Diverse Vegetation Densities, Zachary K. Lankist Apr 2019

Snowshoe Hares (Lepus Americanus) Alter Feeding Behavior In Response To Coyote (Canis Latrans) And Moose (Alces Alces) Cues At Diverse Vegetation Densities, Zachary K. Lankist

Student Scholarship

Prey interpret predator cues as a warning and use them to assess the danger of a given area. Multiple prey species avoid chemical cues from predators at feeding sites because the risk of death outweighs the benefit of food. However, we lack information regarding avoidance of chemical cues from competitors as well as how foraging behavior changes alongside vegetative cover. To test if chemical cues and veget~tive cover alter prey vigilance, number of visits, and time spent at feeding sites, I observed snowshoe hares (Lepus americanus) in plots containing coyote (Canis latrans; predator) and moose (Alces alces; competitor) urine across …


Sensitivity Analysis Of An Airfoil Using Computational Fluid Dynamics, Itay Savion Apr 2019

Sensitivity Analysis Of An Airfoil Using Computational Fluid Dynamics, Itay Savion

Thinking Matters Symposium Archive

In fixed wing aircrafts, the variation of lift coefficient with the angle of attack is a major consideration. This project explores the variation of lift force and lift coefficient of an SD2030 airfoil as a function of the angle of attack, Raynolds number, size of the computational domain, length of the wing, and the fluid mesh size. The problem is modeled using the flow simulation (CFD) module of SolidWorks. The outcome of this sensitivity analysis is compared with available experimental data.


Measuring Birth Trauma Rates In Maine Using Public Data, Mike Lapika Apr 2019

Measuring Birth Trauma Rates In Maine Using Public Data, Mike Lapika

Thinking Matters Symposium Archive

An increasing number of states are creating databases that collect and organize health insurance claims from public and private health care payers. Since December 2016, at least 18 states have these “all-payer claims databases” (APCDs), including Maine. APCDs are intended to inform cost containment and quality improvement by increasing transparency and informing consumer choice. For this project, we assessed how Maine’s APCD data might be used to produce standardized quality measures across facilities in the state. Specifically, we tested a birth outcome quality measure developed by the Agency for Healthcare Research and Quality (AHRQ), Birth Trauma – Injury to Neonate …


Synthesis And Analysis Of 6-Acetyl-1,2,3,4-Tetrahydropyridine, A Major Contributor To ‘Mousy’ Off-Flavor In Sour And Wild Beers, Liesel Krout Apr 2019

Synthesis And Analysis Of 6-Acetyl-1,2,3,4-Tetrahydropyridine, A Major Contributor To ‘Mousy’ Off-Flavor In Sour And Wild Beers, Liesel Krout

Thinking Matters Symposium Archive

Unexpected tastes can negatively impact consumer experience in the beer industry. One such taste, a ‘mousy’ off-flavor, is diminishing the quality of sour and wild beers throughout the brewing community. The unpleasant flavor is a result of the combined presence of three organic compounds: 6-acetyl-1,2,3,4-tetrahydropyridine (ATHP), 2-acetyl-1-pyrroline, and 2-ethyl-3,4,5,6-tetrahydropyridine. Because of its unpredictable nature, brewers must wait for the compound to disappear before distribution, costing them valuable time and revenue. The factors responsible for formation, reasons for persistence, and degradation timelines of the compounds were unknown. A method for quantification was therefore necessary to determine those characteristics, and such quantification …


Convolutional Neural Networks For Protein Image Classification, Nick Littlefield Apr 2019

Convolutional Neural Networks For Protein Image Classification, Nick Littlefield

Thinking Matters Symposium Archive

A solution to the Kaggle competition: Human Protein Atlas Image Classification. Using microscopic images of cells provided by the Human Protein Atlas, convolutional neural networks, CNNs, were used to analyze and predict the location of protein patterns. Challenges included working with an unbalanced dataset, finding a correct learning rate, and choosing a correct architecture to solve the problem. To learn how to overcome these challenges and gain more understanding of the problem, various kernels and discussion posts for the competition, as well as papers on different CNN architectures were used.


Changes In Spring Arrival Times: Climate Change And The Phenology Of Spring Bird Migration, Aaron Svedlow Apr 2019

Changes In Spring Arrival Times: Climate Change And The Phenology Of Spring Bird Migration, Aaron Svedlow

Student Scholarship

Climate change and weather affect the phenology of bird migration; however, specific climatological factors associated with these observed effects have only recently been described. The relationship between local, regional, and global climate patterns and avian migration are increasingly important to understand due to the widespread, and potentially negative, implications (such as reduced fecundity) of rapid human induced climate change on bird populations. Migratory birds are under selective pressure to arrive at breeding areas at the optimal time to set up nesting territories and exploit seasonally abundant food resources, and because climate change has the potential to occur more rapidly than …


An Evaluation Of Elemental Composition Of Soils Associated With Ground Nesting Ants In The Family Formicidae In Somerset County, Maine, Haley H. Depner Apr 2019

An Evaluation Of Elemental Composition Of Soils Associated With Ground Nesting Ants In The Family Formicidae In Somerset County, Maine, Haley H. Depner

All Student Scholarship

Ants are keystone organisms and engineers in many ecosystems, playing an important role in nutrient cycling and rearrangement of organic and inorganic materials through foraging, waste management and, in subterranean species, nest construction and maintenance. In this study, I conducted elemental analysis of soils for calcium, copper, iron, potassium, manganese and zinc in and around the colonies of subterranean nesting ants. The two-step analysis used in this study utilizes the efficiency of X-Ray Fluorescence (XRF) Spectrometry to look for overall trends in elemental composition followed by Flame Atomic Absorbance (AA) to achieve higher resolution of select elements of interest as …


Cape Elizabeth Culvert And Habitat Assessment Study, Steve Harding, Jake Aman, Matthew Craig, Robert Malley, Maureen O'Meara Mar 2019

Cape Elizabeth Culvert And Habitat Assessment Study, Steve Harding, Jake Aman, Matthew Craig, Robert Malley, Maureen O'Meara

Publications

Executive Summary:

In early 2017, Jake Aman, representing the Wells National Estuary Research Reserve (WNERR), met with the Cape Elizabeth Public Works Director and Town Planner to talk about culverts. Jake shared aerial photos of culverts located in the Spurwink Marsh where scouring of adjacent habitat areas was evident. He inquired if the town was considering any culvert replacements, in which case WNERR and The Nature Conservancy might be able to partner with the town to promote a habitat sensitive replacement. The outcome of the meeting was a jointly sponsored assessment of major town culverts, including those located in the …


Long Reach Lane At Long Marsh, Harpswell, 2018 Post-Project Monitoring Report; Year 5 Of 5, Matthew Craig Mar 2019

Long Reach Lane At Long Marsh, Harpswell, 2018 Post-Project Monitoring Report; Year 5 Of 5, Matthew Craig

Publications

No abstract provided.


An Examination Of Computational Methods Related To G/M/C Queueing, Thomas Michaud Ms Jan 2019

An Examination Of Computational Methods Related To G/M/C Queueing, Thomas Michaud Ms

All Student Scholarship

The following examination of computational methods related to queues with general arrivals (i:i:d: but of unknown distribution), multiple identical servers with i:i:d: exponential service times, and ordinary first come, first served service (hereafter referred to as G/M/c to use existing naming conventions) seeks to investigate the current models and provide new results based on a draft convolution method proposed by El-Taha[3]. The new model will demonstrate the use of distributions with coefficients of variance ranging from zero to near infinity to provide flexibility in simulating a range of potential arrival distributions, and we include detailed results and software for both …


Research Innovation And Institutional Growth: Digital Humanities, Usm, And The University Of Maine System, Janet M. Billson, Katherine Bessey Sep 2018

Research Innovation And Institutional Growth: Digital Humanities, Usm, And The University Of Maine System, Janet M. Billson, Katherine Bessey

Research Innovation and Institutional Growth

No abstract provided.


Geochemistry Of Archaeological And Marine Environments In Southwest Maine, Heather L. Bushie Apr 2018

Geochemistry Of Archaeological And Marine Environments In Southwest Maine, Heather L. Bushie

Thinking Matters Symposium Archive

Two archaeological excavations for the University of Southern Maine collected sediment columns from select units for geological and chemical analysis. The Spiller Farms site is a Native American site located in Wells, Maine marking a transition period between the Pleistocene and Holocene epochs, 12,000 BP. The Malaga Island site was a historic mixed-race community at the north end of Casco Bay where sediment columns were obtained in near-shore and subtidal zones. The samples obtained from Malaga Island have been radiocarbon dated to 3800 +/- 30 BP at 23 meters below the low-tide line. X-ray fluorescence (XRF) analysis is being conducted …


Cross-Platform Openhds Web Application, Nick Littlefield Apr 2018

Cross-Platform Openhds Web Application, Nick Littlefield

Thinking Matters Symposium Archive

A proof of concept cross platform data collection application for Demographic and Health studies has been developed. This application allows for the collection of information about locations, individuals, births, and deaths within a region. This application can be run on both mobile devices, laptops, and desktops.


Effects Of Radiation On Neurite Morphology And Cytoskeleton Structure, Melissa Sassman Apr 2018

Effects Of Radiation On Neurite Morphology And Cytoskeleton Structure, Melissa Sassman

Student Scholarship

Long-term manned space exploration to the moon, Mars, and other areas beyond Earth's protective magnetic field poses possible acute and late central nervous systems (CNS) risks. Of particular concern for astronauts is exposure to high atomic number, high energy particles known as HZE particles, a component of galactic cosmic radiation (GCR). Although NASA has radiation safety requirements, the possible effects of GCR and HZE particles on the central nervous systems of astronauts remains unknown. Understanding the risks and effects of galactic cosmic radiation and HZE particles on the central nervous system will allow for safer space exploration.

Additionally, and perhaps …


Making Soap Green, Asia Sweet Apr 2018

Making Soap Green, Asia Sweet

Thinking Matters Symposium Archive

The One Gallon Soap Company (OGSC) recycles partially used bar soap from local Portland hotels and repurposes it as liquid hand soap. The preliminary formulations originally prepared by the OGSC produced a smooth, homogeneous liquid soap with good foaming action. However, over short and often variable time periods, the soap would separate into two layers: a watery bottom layer with little foaming action and an oily top layer. The OGSC asked the USM Chemistry Department to investigate the formulation process in an effort to provide a more stable product – one that would maintain a constant consistency over several months.


Annual Report 2018, Casco Bay Estuary Partnership Jan 2018

Annual Report 2018, Casco Bay Estuary Partnership

Publications

CBEP has been collaborating for over 25 years with a multitude of partners working hard to protect Casco Bay. 2018 brought us new and exciting collaborations.

The Casco Bay Nutrient Council, convened by CBEP, met for almost two years and produced a report that laid a path forward for all partners to tackle nutrient pollution.

CBEP worked closely with the EPA to establish the Casco Bay Monitoring Network, made up of over 20 member organizations, aimed at coordinating and upgrading monitoring in the Bay. The Network is currently updating the Casco Bay Monitoring Plan.

CBEP is an active participant in …


Virus Testing Across Multiple Platforms, Ryan Ignaciuk, Louis Hychko Apr 2017

Virus Testing Across Multiple Platforms, Ryan Ignaciuk, Louis Hychko

Thinking Matters Symposium Archive

Systems Engineering, as a value added re-seller, has noticed a number of organizations questioning the value of anti-virus / anti-malware applications in addition to native operating system protections. So the Maine Cyber Security Cluster (MCSC) at USM teamed up with Systems Engineering in Portland to find out exactly what would happen if a great deal of viruses and malware made it onto your computer that is protected with anti-virus programs they recommend to clients. We used a variety of different operating systems with an assortment of anti-virus programs. These are all either currently in use by Systems Engineering or are …


Impact Of Road Salts (Nacl) On Winter Water Quality In Mill Brook, Westbrook, Maine, Devin Page Apr 2017

Impact Of Road Salts (Nacl) On Winter Water Quality In Mill Brook, Westbrook, Maine, Devin Page

Thinking Matters Symposium Archive

Mill Brook is approximately 5 miles long and is an important migration route for Alewife during the spawning season. Mill Brook stretches from Highland Lake, Westbrook, Maine to the Presumpscot River in Portland, Maine and is surrounded by relatively well-protected forest land. However, chloride concentrations still rise from the upper end of the brook to the end: preliminary data, collected in the winter of 2017, showed an increase in mean chloride concentration from 37.28mg/L +/- 25.61mg/L at the start of Mill Brook to 51.25mg/L +/- 11.63 mg/L at the end of the brook. Chloride concentrations increase in the winter due …


Software Interoperability And The Pods Openhds System, Benjamin S. Heasly Ms Jan 2016

Software Interoperability And The Pods Openhds System, Benjamin S. Heasly Ms

All Student Scholarship

This work addressed challenges of software system interoperability faced by the Open Health and Demographics Surveillance System (OpenHDS). OpenHDS is a distributed application for demographic data collection which was used during a public health intervention in Equatorial Guinea. Specific challenges faced during this intervention included offline data collection and synchronization, changing data collection and software requirements, data size and system performance, and correction of software and data collection errors. This work produced in a new system, the PODS OpenHDS System, which applied four design themes in order to address these challenges: Polymorphism, developer Operations, Declarative style, and Self-description.