RSS 1.0University of Alaska Fairbanks
Sub-communities within this community
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College of Fisheries and Ocean Sciences (CFOS)
The College of Fisheries and Ocean Sciences educates and inspires the next generation of world-class aquatic ecosystem scientists. -
Office of the Provost
The University of Alaska Fairbanks Provost is responsible for providing overall leadership, coordination and direction to UAF research and scholarly activities and graduate studies. -
School of Education (SOE)
The School of Education is committed to preparing and retaining the best possible K-12 educators for this far north, geographically, culturally and linguistically diverse state. -
School of Management (SOM)
The School of Management provides a high quality education that prepares students for professional success in meeting the challenges facing businesses in Alaska and around the world. -
School of Natural Resources and Agricultural Sciences (SNRAS)
As the primary land-grant component of the university, SNRAS administers a variety of programs and engages in cooperative efforts with federal, state, and borough governments and agencies. -
UAF Graduate School
University of Alaska Fairbanks Graduate School -
Undergraduate Research and Scholarly Activity
At the University of Alaska Fairbanks, the Office of Undergraduate Research and Scholarly Activity (URSA) supports, develops and institutionalizes UAF's diverse and robust programs of undergraduate research and creative ...
Recent Submissions
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ROADS AND AIRFIELDS CONSTRUCTED ON PERMAFROST: A Synthesis of PracticeThis synthesis provides the practicing engineer with the basic knowledge required to build roadway and airports over permafrost terrain. Topic covered include an overview of permafrost, geotechnical investigations, slope stability, impacts of climate, and adaptation strategies during the design, construction and maintenance phases. The purpose of the synthesis is not to provide a comprehensive body of knowledge or to provide a complete how‐to manual. Rather the synthesis provides a working knowledge for those working in permafrost regions such that the practicing engineer will be able to work with subject matter experts to obtain the desired project outcomes.
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AACSE earthquake catalog: January-August, 2019The Alaska Amphibious Community Seismic Experiment (AACSE) comprised 75 ocean bottom seismometers and 30 land stations and covered about 650 km along the segment of the subduction zone that includes Kodiak Island, the Alaska Peninsula and the Shumagin Islands between May 2018 and September 2019. This unprecedented offshore dataset has the potential to support a greatly enhanced earthquake catalog by both increasing the number of detected earthquakes and improving the accuracy of their source parameters. We use all available regional and AACSE campaign seismic data to compile an enhanced earthquake catalog for the region between Kodiak and Shumagin Islands including Alaska Peninsula (51-59N, 148-163W). We apply the same processing and reporting standards to additional picks and events as the Alaska Earthquake Center currently use for compilation of the authoritative regional earthquake catalog. This release includes earthquake catalogs for the time period between January 01 and March 31, 2019. We include monthly CSS database tables (aecevent, arrival, assoc, event, netmag, origerr, origin) and quakeml files.
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Alaska Earthquake Center Quarterly Technical Report January-March 2021This is the first in a series of technical quarterly reports from the Alaska Earthquake Center (AEC). It includes detailed summaries and updates on Alaska seismicity, the AEC seismic network and stations, field work, our social media presence, and lists publications and presentations by AEC staff. Multiple AEC staff members contributed to this report. It is issued in the following month after the completion of each quarter Q1: January-March, Q2: April-June, Q3: July-September, and Q4: October-December.
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Porphyry copper, copper skarn, and volcanogenic massive sulfide occurrences in the Chandalar copper district, AlaskaMetamorphosed porphyry copper, copper skarn, and volcanogenic massive sulfide (VMS) occurrences have been found in 5 key prospects within Devonian rocks of the Chandalar copper district, Alaska. The Venus, Victor, Eva, and Evelyn Lee prospects contain "proximal" porphyry copper/copper skarn mineralization, whereas the Luna prospect contains "distal" Cu-Zn skarn and Cu-Zn VMS mineralization. Porphyry copper mineralization is recognized by granodiorite composition meta-intrusives; zoned potassic, sericitic and propylitic alteration; and del34S values of -1.5 to -0.6 per mil. Skarns consist of andraditic garnet (Ad30-100) and diopsidic pyroxene (Hd9-46), and have del34S values of -4.7 to -1.1 per mil. Alteration types in intrusive rocks and adjacent skarn are generally compatible. VMS occurrences contain chloritic and silicic alteration, and massive sulfides have del34S values of -0.8 to 6.9 per mil, consistent with values from known Devonian VMS deposits.
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Mesoscale modeling study of a polar low in the Chukchi and Beaufort SeasPolar lows are intense mesoscale maritime cyclones, often associated with strong winds that can damage high-latitude coastal environments and infrastructure. These systems have been historically infrequent in the Chukchi and Beaufort seas, but this behavior is expected to change along with the amplified changes in Arctic climate. This study investigates the unusual occurrence of a polar low in this region on October 9-10, 2009. Sensitivity experiments with the Weather Research and Forecasting model indicate that using ERA-Interim as large-scale forcing and performing spectral nudging at all simulation hours yield the most realistic simulation. The simulations are highly sensitive to physical parameterizations, where Morrison rnicrophysics and Yonsei University boundary layer produce the smallest errors. Surface forcings were not important for the polar low development and their influence could not extend above 850 hPa due to a stable lower atmosphere. A convergence zone between the Aleutian Low and the Beaufort High established a southerly flow that created favorable conditions by continuously adverting heat and moisture from lower latitudes. The polar low had a hybrid development and was likely triggered by the interaction between a deep-penetrating upper-level potential vorticity anomaly and a low-level baroclinic zone, which were driven northward by the jet stream.
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Alaska Earthquake Center: A 2020 PerspectiveThe Alaska Earthquake Center is not historically in the habit of producing annual reports. We are in a dynamic time, however. Societally-significant earthquakes and multiple tsunami concerns over the past few years have brought more attention to what we do. At the same time, we are experiencing significant growth in several areas. Our goal in distributing this summary is to communicate the breadth of our activities and the diversity of our stakeholders, helping us become even more effective at meeting the earthquake and tsunami science needs of Alaska and the nation.
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Legacy junk: MFA thesis exhibitionI recently purchased a tract of raw land with the intention of building a cabin, and wasn't terribly surprised to find the land came with some impressive piles of junk. I was frankly enamored of these objects, abandoned but not destroyed by the previous owner. They had a potentially useful quality that resonated with other aspects of the Fairbanks community; transfer sites, the airplane graveyard behind the airport, old couches and tables and wooden spools that littered the yards of countless homes. This rural detritus represents a confluence of natural and cultural forces that Alaskans experience every day. I wish to investigate this transitional territory by abstracting and amplifying the fine line between usefulness and decay. I believe that in this modern life, it is all too easy to assume that the world of nature and the world of human culture are totally separate. For me, this assumption was repeatedly challenged after experiencing the destructive power of nature during my childhood in Tornado Alley, and more recently, the subzero temperatures of Interior Alaska. I typically draw inspiration from daily observations of my environment, and as a result my imagery changed dramatically after I moved to the far North. Despite the change of landscape, the core concept of investigating intersections of nature and culture remains the same. This is a fascinating task in the Alaskan Interior, as these intersections are clearly exposed. This community has a unique relationship to nature, as modern homes and businesses coexist with virtually untouched wilderness. These experiences have instilled in me a deep respect for the vast web of life that both supports and threatens my community, and motivates me to seek out and emphasize places where natural and artificial worlds collide using the malleable language of art and oil painting.
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VITAS: A Visual ExhibitVITAS is a visual exhibition that addresses the idea of a posthumous legacy. The substance of a person’s life is composed of what they’ve done, and what they become after death is determined by that substance. This exhibition is composed of 25 carved animal skulls and sculptures inspired by the concept of vitas, treating life as an opportunity to advance the next generation through life’s work. VITAS studies the idea of what happens after the passing of a being by applying embellishment, adornment, pigments, and carvings onto the skeletal remains of animals. By applying human influence to natural material, the animal’s experience becomes a vital part of the artwork. Bone density, size, condition, and abnormalities are all determined by how the animal lived. These factors are a major consideration in design and aesthetic choices in each unique piece.
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Nome Eskimo Community Tribal Council Resource GuideThe Nome Eskimo Community Tribal Council Resource is a digital manual composed of information for newly elected tribal leaders so they can provide the best guidance to the Tribe, develop leadership skills, and serve the community. The purpose of this project is to ensure that current and future tribal council members and presidents have access to information necessary to make decisions on important issues using best practices for governance and leadership. The resource guide includes roles and responsibilities as well as local and statewide resources in various areas of governance including child welfare, land, natural resources, and education. It is intended to provide a starting point for newly elected tribal members. Additionally, Nome Eskimo Community (NEC) bylaws, program information, photos and recorded interviews of current and former tribal leaders will provide newly elected officials with important NEC history. The different subjects contained within the guide are specific to the programs the Council is governing. Leaders have access to the digital resource guide via downloadable files which can be viewed on a tablet. The resource guide will include the roles and responsibilities of the tribal council and the president and will cover governance, leadership practices, and program resources. The resource guide can be further developed to include advanced information for experienced leaders in the following areas: child welfare, land, natural resources, and education.
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Creating safety policy and procedures in an active shooter eventSchool and workplace active shootings are on the rise and seem to be the norm today and there is not a working policy in place to train for an active shooter event in our organization, Golden Valley Electric Association. The purpose of this project was to develop a workable policy and procedure for the employees and to enhance the safety culture within our organization. To achieve this goal, a training presentation was created using the ALICE Training Institute’s protocol to train the workforce. The ALICE acronym stands for A=Alert, L=Lockdown, I=Inform, C=Counter, E=Evacuate. Over the course of research for this project, research indicated that a crisis management plan (CMP) and crisis management team (CMT) would be a better option for training the organization, not policies and procedures. A sample crisis management plan and outline for the crisis management team were created. The crisis management team would deal with the policies and procedures and ensure the success of training the workforce and enhancing the safety culture of the organization. The recommendations are for the organization to select the CMT, review the CMP created, and implement and maintain the plan. Following and implementing these recommendations into practice would ensure the workforce was trained and would strengthen the safety culture of the organization.
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A Place-based study of Alaskan animalsIn the spring of 2020, my second-grade class, located in Fairbanks, AK, dived into a place-based exploration of Alaskan animals. The aim of the project was to increase students’ connections and understanding of the state where they live (Alaska) and the animals that they share it with. Through a backwards design, inquiry-based instructional model, my students met state standards with an integrated-subject approach. With art, guest speakers, research, and field trips my students learned about the Animals that share Alaska with us, their environments, and their adaptations. Students used informational writing published on digital mediums to share their knowledge with others. I propose to share this unit with other educators in the form of a website with links and lesson plans so that more teachers and children have access to quality place-based materials that align to state standards.
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Measuring the impact of cooperative rewards on AIWe consider the effects of varying individualistic and team rewards on learning for a Deep Q-Network AI in a multi-agent system, using a synthetic team game ‘Futlol’ designed for this purpose. Experimental results with this game using the OpenSpiel framework indicate that mixed reward structures result in lower win rates. It is unclear if this is due to faster learning on simpler reward structures or a flaw in the nature of the reward system.
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Review and case study of electric submersible pump performance with dispersionsCentrifugal pump performance is very sensitive to fluid viscosity, gas fraction, and flow pattern in impeller channels. Viscous oil reduces the head and rate capacity of the pump. High gas fraction reduces the head capacity of the pump at high rates and leads to unstable surging at low rates. If the flow pattern in the impeller transitions to an elongated bubble the pump can gas-lock causing loss of production and excessive heat buildup. The complex geometry and 3-dimensional flow in a pump stage make the analysis of flow in a pump difficult without simplifying assumptions. Empirical and mechanistic models have been developed for correcting pump performance for viscosity, gas fraction, and predicting flow pattern within the impeller with reasonable accuracy. Difficulties arise when produced fluids form stable dispersions. Foams, emulsions, and solid suspensions make the determination of viscosity, gas separation efficiency, and flow pattern more difficult. Interfacial properties between phases become important in determining the bulk fluid properties, and the presence of surfactants exacerbates the interfacial effects. The objective of this project is to describe the fundamentals of electrical submersible centrifugal pumps, ESPs, and the effects that produced fluids have on their performance. These findings are then used to evaluate a case study of an ESP installed in a well with foamy and viscous crude. The ESP exhibits reduced head and rate compared to predicted viscous and gas corrections. Including interfacial effects on the fluid viscosity allow a satisfactory performance match of pump performance to be achieved. The effect of foam on pump performance can be attributed to the increased viscosity exhibited when gas behaves as a dispersed phase in a continuous oil phase rather than a separate phase in a mixture.
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The Ranch(er)THE RANCH(ER) is a thesis project to fulfill the requirements of an MFA degree in visual fine-arts. This project focused on exploring my connection between the land, the ranch and its tools, and generations of ancestors living and working a small family ranch. I give voice to the seldom-vocal rancher and the isolation, hardships, and tenderness of ranch life. I have chosen as subjects for this exhibition objects that are utilitarian and are items woven into the cultural fabric of ranchers and their families. They are icons of generational identity. Rather than creating purely traditional functional objects such as cups and bowls, I’ve created conceptual pieces that emphasize the intangible connection between utilitarian objects and their users, as well as the objects’ roles in its customary position. By removing the items from their original context, I point to the context of function and utility: a life of use and work. Clay is the primary material used to create this installation to tell a universal story. The ceramic and sculptural pieces were exhibited to the public as an installation in the University of Alaska Fairbanks Fine Arts Gallery in the Fine Art Complex, Room 312, from November 2-20, 2020. The artist’s public presentation was given through an open Zoom meeting on Friday, November 13, 2020. The project report summarizes the examination and investigations involved in the development of the project.
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Automated remote security scoring engine (ARSSE): gamification of cyber security educationThe goal of this project is to create an easy to use, extensible, and engaging method to compute scores interactively during a practical cyber security education. Gamification has been shown to be an effective teaching tool and has been used in the offensive cybersecurity education space (via Capture The Flag competitions and challenges such as hackthebox.eu) but there has not been an open-source effort to bring this idea to the defensive side (blue team) aspect of cybersecurity. The Automated Remote Security Scoring Engine (ARSSE, pronounced "Arsh") uses a combination of well maintained open-source tools and custom connectors to facilitate an easy to use, scalable, and secure system to check the state of a computer system against a desired state and award points based on passed checks. ARSSE has been released to the public with the hope that it will fill a gap in training the next generation of information security professionals.
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Recommendations for training of substitute teachers in the Matanuska-Susitna Borough School DistrictWith increasing importance placed on student growth and achievement scores, increasing teacher absenteeism, and increasing amounts of time students spend being taught by substitute teachers, it is surprising that the preparation of substitute teachers does not reflect the significance of the job they have in relation to these trends. Research shows that training can increase substitute teacher effectiveness, which may positively affect student growth and achievement. The purpose of this project was to determine what the substitute teacher onboarding process was, including employment requirements and required training, for substitute teachers in the Matanuska-Susitna Borough School District and to make recommendations to the district for the training of substitute teachers. Substitute teachers in the district were asked to complete a survey regarding their experience, current level of training, and perceived training needs. I found that regardless of the amount of experience and training substitute teachers already possess, they want more training not only in the programs and initiatives utilized by the district, but also in effective instructional strategies, best practices, and teaching methods in curricular areas. While the district onboarding process is fairly comprehensive, as is the available optional training, I developed recommendations to improve the onboarding process and training options for substitute teachers in the district to strengthen substitute teacher effectiveness.
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Applying the environmental identity development model in place-based education: an online resource guideI created an online resource guide for place-based education (PBE) informed by the Environmental Identity Development (EID) Model and research (Green et al., 2016). The EID Model provides a flexible framework for understanding how individuals develop their sense of self within and in relation to the natural world. The model is valuable as a diagnostic tool and a guide in the creation of place-based activities that support children’s play, learning, and growth in nature. The goals of this project were to create an accessible guide to understanding the EID Model and theory; to demonstrate how the EID Model and research may be used in the development of culturally relevant educational strategies; to utilize the EID Model in the creation and curation of effective and flexible PBE activities. Qualitative data from the EID research project were used to explain and contextualize the EID Model. Place-based pedagogies and land education pedagogies were utilized in the development of educational resources. The educational resources created for the website are accessible and flexible, adaptable for diverse ages and environments. The website encourages adults to support “spontaneous” child-initiated activities and explorations in the natural world. Ultimately, this guide is an accessible resource that encourages educators to utilize the EID Model in the pursuit of culturally responsive and child-centered PBE in their own context.
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A Bayesian mixed multistate open-robust design mark-recapture model to estimate heterogeneity in transition rates in an imperfectly detected systemMultistate mark-recapture models have long been used to assess ecological and demographic parameters such as survival, phenology, and breeding rates by estimating transition rates among a series of latent or observable states. Here, we introduce a Bayesian mixed multistate open robust design mark recapture model (MSORD), with random intercepts and slopes to explore individual heterogeneity in transition rates and individual responses to covariates. We fit this model to simulated data sets to test whether the model could accurately and precisely estimate five parameters, set to known values a priori, under varying sampling schemes. To assess the behavior of the model integrated across replicate fits, we employed a two-stage hierarchical model fitting algorithm for each of the simulations. The majority of model fits showed no sign of inadequate convergence according to our metrics, with 81.25% of replicate posteriors for parameters of interest having general agreement among chains (r < 1.1). Estimates of posterior distributions for mean transition rates and standard deviation in random intercepts were generally well-defined. However, we found that models estimated the standard deviation in random slopes and the correlation among random effects relatively poorly, especially in simulations with low power to detect individuals (e.g. low detection rates, study duration, or secondary samples). We also apply this model to a dataset of 200 female grey seals breeding on Sable Island from 1985-2018 to estimate individual heterogeneity in reproductive rate and response to near-exponential population growth. The Bayesian MSORD estimated substantial variation among individuals in both mean transition rates and responses to population size. The correlation among effects trended positively, indicating that females with high reproductive performance (more positive intercept) were also more likely to respond better to population growth (more positive slope) and vice versa. Though our simulation results lend confidence to analyses using this method on well developed datasets on highly observable systems, we caution the use of this framework in sparse data situations.
