Now showing items 1-20 of 8685

    • COVID-19 and the Anchorage economy

      Guettabi, Mouhcine (Institute of Social and Economic Research, University of Alaska Anchorage, 2020-05-06)
    • The Impacts of the “Hunker Down” order in Anchorage

      Berry, Kevin (Institute of Social and Economic Research, University of Alaska Anchorage, 2020-05-21)
      This brief models the COVID-19 epidemic in Anchorage Alaska to better understand the impact of the Municipality of Anchorage (MOA) “Hunker Down” order and provide insight into the potential benefit of the State of Alaska (SOA) “Stay at Home” order. The economic benefits of the hunker down order are measured in avoided mortality, based on the EPA value of a statistical life of $7.5 million. The benefits are for the epidemic to date based on confirmed cases and a simulation of an Anchorage epidemic based on epidemiological parameters from the scientific literature. Modeling suggests ~5400 deaths were avoided to date. Using a value of a statistical life of $7.5 million, the hunker down order is estimated to have avoided $40.5 billion in mortality due to COVID-19 to date. The economic costs of the shutdown are estimated based on the expected loss of GDP in Alaska, at roughly $4 billion to date. The long run economic costs are not estimated in this report, and will be heavily influenced by efforts by individuals to avoid infection. The estimates of the economic cost are also an upper bound estimate, as many of the costs may have happened regardless of the hunker down order as individuals avoided public spaces to protect themselves.
    • Farming along desire lines: Collective action and food systems adaptation to climate change.

      Thornton, Thomas F. (British Ecological Society, 2020-03-03)
      1. We examine collective action in the food system of the Canadian Maritimes to determine its effect on the resilience and adaptive capacity of food producers, distributors, retailers and governance institutions. 2. Our data suggest that beyond their immediate benefits for their participants, expressions of collective action generate higher-level impacts which often translate into drivers of adaptive capacity. 3. Drawing on a metaphor from urban design, we suggest that collective action should be considered a desire line for food systems adaptation: rather than building adaptation strategies based on top-down design, collective action emerges from farmers’ needs and capacities to build financial resilience, enhance human and social capital and strengthen institutional agency within the system.
    • Year Seven Peer‐Evaluation Report, University of Alaska Southeast, Juneau, Alaska, April 23-26, 2019

      Northwest Commission on Colleges and Universities (Northwest Commission on Colleges and Universities, 2019-05-13)
      A confidential report of findings prepared for the Northwest Commission on Colleges and Universities
    • Effects of Reading Text While Driving: A Driving Simulator Study

      Prevedouros, Panos; Miah, M. Mintu; Nathanail, Eftihia (2020-02)
      Although 47 US states make the use of a mobile phone while driving illegal, many people use their phone for texting and other tasks while driving. This research project summarized the large literature on distracted driving and compared major outcomes with those of our study. We focused on distraction due to reading text because this activity is most common. For this research project, we collected simulator observations of 203 professional taxi drivers (175 male, and 28 female) working at the same Honolulu taxi company, using the mid-range driving simulator VS500M by Virage. After a familiarization period, drivers were asked to read realistic text content relating to passenger pick up displayed on a 7-inch tablet affixed to the dashboard. The experimental scenario was simulated on a two-lane rural highway having a speed limit of 60 mph and medium traffic. Drivers needed to follow the lead vehicle under regular and text-reading conditions. The large sample size of this study provided a strong statistical base for driving distraction investigation on a driving simulator. The comparison between regular and text-reading conditions revealed that the drivers significantly increased their headway (20.7%), lane deviations (354%), total time of driving blind (352%), maximum duration of driving blind (87.6% per glance), driving blind incidents (170%), driving blind distance (337%) and significantly decreased lane change frequency (35.1%). There was no significant effect on braking aggressiveness while reading text. The outcomes indicate that driving performance degrades significantly by reading text while driving. Additional analysis revealed that important predictors for maximum driving blind time changes are sociodemographic characteristics, such as age and race, and past behavior attributes.
    • Seismicity and Stresses in the Kantishna Seismic Cluster, Central Alaska

      Burris, Lea A. (2007-12)
      The Kantishna Cluster is an enigmatic and energetic cluster of earthquakes located in central Alaska, just to the northwest of Mt. McKinley/Denali and adjacent to the Denali Fault. The Kantishna Cluster has no visible fault traces, and is often speculated to have a connection to the Denali Fault. The Kantishna Cluster is located at a hub of tectonic activity including Bering Block rotation to the west, bookshelf faulting to the northeast, and rotation of southern Alaska due to Pacific plate convergence to the south. The intention of this study was to broaden the knowledge base about the Kantishna Cluster and use the Mw 7.9 Denali Fault earthquake to find a relationship between the cluster and the Denali Fault Zone. Rate calculations in conjunction with z- and b-value changes show that the Denali Fault earthquake had little influence on the seismicity of the Kantishna Cluster, with the exception being the southern most portion closest to the Denali Fault. The highly variable background rate of seismicity in the Kantishna Cluster makes seeing changes in the seismicity difficult. Stress tensor inversions suggest a change in the stresses in the Kantishna Cluster; however, triangle diagram comparisons show that the pattern of earthquake mechanism types did not change. Coulomb stress change calculations predict small changes that were not observed in the data. Double difference hypocentral relocations show that the cloud of earthquakes collapses down to several distinct features. Seismicity trends resolved from hypocentral relocations made it possible to infer fault planes or planar structures in the region. The newly uncovered structures are utilized in the formation of a model involving two wedges to describe the seismicity in the Kantishna Cluster. The two wedges are being “squeezed” in opposite directions accommodating for compression across the cluster due to Pacific plate convergence.
    • Homicide in Alaska: 1976-2016

      Gonzalez, Andrew (Alaska Justice Information Center, University of Alaska Anchorage, 2020-05-20)
      AJiC's Homicide in Alaska: 1976-2016 compiled 41 years of data from the Federal Bureau of Investigation’s Supplementary Homicide Reports (SHR). This is the first time these data on homicide in Alaska have been examined across a multi-year timespan. The report describes homicide incidents, victims and suspects. These characteristics included weapon use, relationships between victims and suspects, circumstances, demographic characteristics, and more presenting the differences among race and sex groups. Additionally, the report makes note of the magnitude and characteristics of homicides involving American Indian and Alaska Native female victims, as well as how the rate of homicide victimization differs by race and sex of the victim. In addition to the full report, three one-page fact sheets are included: 1) Homicide Victimization Fact Sheet; 2) Firearms Fact Sheet, and; 3) Relationships Fact Sheet.
    • Data (Appendix) for Book Chapter 43: Citizen Science Experience in Lumbini/Nepali for Sarus Cranes and Lesser Adjudants (Storks) with Regmi and Huettmann 2020 Hindu Kush Himalaya: Watersheds Downhill, Springer

      Karmacharya, D.K.; Duwal, R.; Yadav, S.K. (4/2/2020)
      This dataset consist of an appendix of citizen science data for the Sarus Crane and Adjudant storks in Lumbini and Jagdishpur Reservoir, Nepal. It's a plain MS Excel sheet.
    • Data (Appendix) for Book Chapter 33: Persistent Langur (Semnopithecus) decline in Nepal with Regmi and Huettmann 2020 Hindu Kush Himalaya: Watersheds Downhill, Springer

      Ale, Purna Bahadur; Regmi, Ganga Ram; Huettmann, Falk (4/2/2020)
      This dataset consists of an appendix of a GIS map of langur sp information in Nepal. The datasets are locations, presences and absences from a value-added query, transect data by the authors and literature data Details are specified in the book chapter by Ale et al in Regmi and Huettmann 2020. This is the first and best compiled data for this species in Nepal and shows national declines with large conservation management implications.
    • Data (Appendix) for Book Chapter 25: Museum Data holdings and Libraries in Nepal and Hindu Kush Himalaya region with Regmi and Huettmann 2020 Hindu Kush Himalaya: Watersheds Downhill, Springer

      Huettmann, Falk (4/2/2020)
      This compiled dataset consists of a value-added analysed GBIF data set in the wider Hindu Kush-Himalaya (HKH) region. The original data source is from individual national contributors found in GBIF. Data are used here for research purposes for the wider HKH region watersheds and to show institutional spread and distribution. Some major outside museums internationally are mentioned too. The dataset consists of MS Excel sheets Methods and details are specified in the book chapter by Huettmann in Regmi and Huettmann 2020. This is the first and best compiled data for the study area and is to set a start of such views and investigations towards a better and more fair access to data, as part of a better and more democratic decision-making process.
    • Data (Appendix) for Book Chapter 22: Rapid Assessment of Urban Birds and GIS models of Kathmandu and Pokhara, Nepal with Regmi and Huettmann 2020 Hindu Kush Himalaya: Watersheds Downhill, Springer

      Hansen, Lindsay; Huettmann, Falk (4/2/2020)
      This compiled dataset consists of a field data from rapid assessment of common birds found in urban areas of Kathmandu and Pokhara, Nepal, Hindu Kush-Himalaya (HKH) region.The dataset consists of 31 bird and animal species from a detection survey of 2 transects and photos in MS Excel sheets. It is overlaid with Open Street GIS map predictors for the study areas, and model predicted with GIS. We used the following 6 layers:waterways, natural places, shop polygons, land use, roads and highways and computed proximities for each in GIS. Methods and details are specified in the book chapter by Huettmann in Regmi and Huettmann 2020. This is the first and best compiled field and GIS data for the study area and is to set a start of such views and investigations towards a better and more fair access to data, as part of a better and more democratic decision-making process. Here an example is presented using avian species and GIS habitat layers.
    • Data (Appendix) for Book Chapter 37: 'Road, Railroad and Airport data for the Hindu Kush Himalaya region' with Regmi and Huettmann 2020 Hindu Kush Himalaya: Watersheds Downhill, Springer

      Huettmann, Falk (4/2/2020)
      This compiled dataset consists of an appendix of value-added merged GIS maps for roads, railroads and airports in the wider Hindu Kush-Himalaya (HKH) region. The original data source is from individual national DIVA-GIS files and used here for research purposes for the wider HKH region watersheds. Nations included are: Nepal, India, China, Buthan, Kazachstan, Tajikistan, Kyrgystan, Uzbekistan, Turkmenistan, Afghanistan, Iran, Laos, Myanmar, Thailand, Vietnam, Pakistan, Bangladesh and Cambodia. The dataset consists of 21zip archives of these nations also covering railways and airports. Methods and details are specified in the book chapter by Huettmann in Regmi and Huettmann 2020. This is the first and best compiled data for the study area.
    • Data (Appendix) for Book Chapter 28: Sarus Crane GIS Model with Regmi and Huettmann 2020 Hindu Kush-Himalaya: Watersheds Downhill, Springer

      Karmacharya, D. K.; Huettmann, F.; Mi, C; Han, X; Duwal, R; Yadav, SK; Guo, Y (4/2/2020)
      This dataset consist of an appendix of GIS model predictions of Sarus Cranes (GRus antigone Taxonomic Serial Number TSN: 176181) in Nepal. Details are specified in the book chapter by Karmacharya et al in G.R.Regmi and F. Huettmann 2020. This is the first model for this species and shows conservation management implications for the Terai landscape between Nepal and India.
    • A Pilot Evaluation of the Performance Diagnostic Checklist for Assessing Employee Satisfaction and Support in Call Centers

      Kiester, Rebekah (University of Alaska Anchorage, 2020-04-13)
      Call center employees play a critical role in providing customer service, and directly influence customer satisfaction and retention (Slowiak, 2014). Determining what variables influence employee satisfaction and performance in call centers is crucial for organizations and businesses to support their employees. The Performance Diagnostic Checklist (PDC) was developed to identify variables that influence employee performance (Austin, 2000). The PDC has been found to be effective in a variety of settings, but a review of the literature indicates it has not been used to assess employee support in financial institutions. This study aims to adapt the PDC for use with employees in a financial institution call center to systematically assess factors related to employee support throughout the department. Results of the study indicate overall high levels of employee support, but indicate the potential for improvement in communication of department performance indicators as well as monitoring and providing clear performance feedback.
    • Outlet glacier response to forcing over hourly to interannual timescales, Jakobshavn Isbræ, Greenland

      Podrasky, David; Truffer, Martin; Fahnestock, Mark; Amundson, Jason M.; Cassoto, Ryan; Joughin, Ian (International Glaciological Society, 2012-09-07)
      The loss of the floating ice tongue on Jakobshavn Isbræ, Greenland, in the early 2000s has been concurrent with a pattern of thinning, retreat and acceleration leading to enhanced contribution to global sea level. These changes on decadal timescales have been well documented. Here we identify how the glacier responds to forcings on shorter timescales, such as from variations in surface melt, the drainage of supraglacial lakes and seasonal fluctuations in terminus position. Ice motion and surface melt were monitored intermittently from 2006 to 2008. Dual-frequency GPS were deployed 20–50 km upstream of the terminus along the glacier center line. Gaps in surface melt measurements were filled using a temperature-index model of ablation driven by surface air temperatures recorded during the same time period. Our results corroborate the premise that the primary factors controlling speeds on Jakobshavn Isbræ are terminus position and geometry. We also observe that surface speeds demonstrate a complex relationship with meltwater input: on diurnal timescales, velocities closely match changes in water input; however, on seasonal timescales a longer, more intense melt season was observed to effectively reduce the overall ice flow of the glacier for the whole year.
    • Two Years of High-Resolution Airborne Imagery and Value-Added Products for the Barrow Environmental Observatory

      Cherry, Jessica; Lovick, Joe; Crowder, Kerri; Cunningham, Keith; Schroder, Julien (2013-12)
      Optical and thermal infrared imagery were collected by UAF at the Arctic NGEE Intensive sites in 2012 and 2013.
    • Observing calving-generated ocean waves with coastal broadband seismometers, Jakobshavn Isbræ, Greenland

      Amundson, Jason M.; Clinton, John F.; Fahnestock, Mark; Truffer, Martin; Luthi, Martin P.; Motyka, Roman J. (International Glaciological Society, 2012)
      We use time-lapse photography, MODIS satellite imagery, ocean wave measurements and regional broadband seismic data to demonstrate that icebergs that calve from Jakobshavn Isbræ, Greenland, can generate ocean waves that are detectable over 150 km from their source. The waves, which are recorded seismically, have distinct spectral peaks, are not dispersive and persist for several hours. On the basis of these observations, we suggest that calving events at Jakobshavn Isbræ can stimulate seiches, or basin eigenmodes, in both Ilulissat Icefjord and Disko Bay. Our observations furthermore indicate that coastal, land-based seismometers located near calving termini (e.g. as part of the new Greenland Ice Sheet Monitoring Network (GLISN)) can aid investigations into the largely unexplored, oceanographic consequences of iceberg calving.
    • Science Plan for Regional Arctic System Modeling

      Roberts, Andrew (2010-11-01)
      Data and PDFs for "A Science Plan for Regional Arctic System Modeling" by Roberts, A. and Coauthors, 2010, IARC Technical Report 10-0001. The data collection includes the full report, a NetCDF file containing information used to illustrate and define the Arctic System in Figure 2, and supplemental PDFs of individual figures produced especially for the report. A URL is also provided that links to workshops where outcomes contributed substantially to this report. The purpose of the science plan is to provide a roadmap for understanding variability, complexity and change in the Arctic and it's adjacent environments, including understanding interconnectivity of the geosphere, biosphere and anthroposphere of the high north.
    • Impact of hydrodynamics on seismic signals generated by iceberg collisions

      Amundson, Jason M.; Burton, Justin C.; Correa-Legisos, Sergio (International Glaciological Society, 2012)
      Full-glacier-thickness icebergs are frequently observed to capsize as they calve into the ocean. As they capsize they may collide with the glaciers’ termini; previous studies have hypothesized that such collisions are the source of teleseismic ‘glacial earthquakes’. We use laboratory-scale experiments, force-balance modeling and theoretical arguments to show that (1) the contact forces during these collisions are strongly influenced by hydrodynamic forces and (2) the associated glacial earthquake magnitudes (expressed as twice-integrated force histories) are related to the energy released by the capsizing icebergs plus a hydrodynamic term that is composed of drag forces and hydrodynamic pressure. Our experiments and first-order modeling efforts suggest that, due to hydrodynamic forces, both contact force and glacial earthquake magnitudes may not be directly proportional to the energy released by the capsizing icebergs (as might be expected). Most importantly, however, our results highlight the need to better understand the hydrodynamics of iceberg capsize prior to being able to accurately interpret seismic signals generated by iceberg collisions.