Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2015

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 271 - 300 of 22196

Full-Text Articles in Entire DC Network

Uncertainty Quantification Of Gas Production In The Barnett Shale Using Time Series Analysis, Kishan Ghanshyambhai Joshi Dec 2015

Uncertainty Quantification Of Gas Production In The Barnett Shale Using Time Series Analysis, Kishan Ghanshyambhai Joshi

Engineering

Deterministic methods for evaluating uncertainty in production forecasts for unconventional shale plays are either unreliable or time intensive. This thesis presents an improved methodology for quantifying uncertainty in production forecasts using Logistic Growth Analysis (LGA) and time series modeling. The applicability of the proposed method is tested by history matching production data and providing uncertainty bounds for forecasts from eight Barnett Shale counties. The 80% confidence interval (CI) generated by this method successfully bracketed true production values for all the counties, even when approximately one-third of the data was used for history matching. In the methodology presented, the trend in …

Go to article

Winter Commencement: December 17-18, 2015, University Of North Dakota Dec 2015

Winter Commencement: December 17-18, 2015, University Of North Dakota

UND Commencement Programs

UND Winter Commencement program from December 17-18, 2015.

Go to article

Taminek Taiut, Peggy Azuyak Dec 2015

Taminek Taiut, Peggy Azuyak

Linguistics

No abstract provided.

Go to article

Bilingual Research Centers In An Alaska Studies Classroom, Julia Sipary Dec 2015

Bilingual Research Centers In An Alaska Studies Classroom, Julia Sipary

Linguistics

No abstract provided.

Go to article

Characterization And Diagnostic Methods For Geomagnetic Auroral Infrasound Waves, Justin J. Oldham Dec 2015

Characterization And Diagnostic Methods For Geomagnetic Auroral Infrasound Waves, Justin J. Oldham

Physics

Infrasonic perturbations resulting from auroral activity have been observed since the 1950's. In the last decade advances in infrasonic microphone sensitivity, high latitude sensor coverage, time series analysis methods and computational efficiency have elucidated new types of auroral infrasound. Persistent periods of infrasonic activity associated with geomagnetic sub-storms have been termed geomagnetic auroral infrasound waves [GAIW]. We consider 63 GAIW events recorded by the Fairbanks, AK infrasonic array I53US ranging from 2003 to 2014 and encompassing a complete solar cycle. We make observations of the acoustic features of these events alongside magnetometer, riometer, and all-sky camera data in an effort …

Go to article

Local Scale Structures In Earth's Thermospheric Winds And Their Consequences For Wind Driven Transport, Manbharat Singh Dhadly Dec 2015

Local Scale Structures In Earth's Thermospheric Winds And Their Consequences For Wind Driven Transport, Manbharat Singh Dhadly

Physics

In the traditional picture of Earth's upper thermosphere (~190-300 km), it is widely presumed that its convective stability and enormous kinematic viscosity attenuate wind gradients, and hence smooth out any structure present in the wind over scale size of several hundreds of kilometers. However, several independent experimental studies have shown that observed upper thermospheric wind fields at high latitudes contain stronger than expected local-scale spatial structures. The motivation of this dissertation is to investigate how the resulting local-scale gradients would distort neutral air masses and complicate thermospheric wind transport. To achieve this goal, we examined the behavior of a simple …

Go to article

Ncpa Propagation Code Users Manual, Andrew T. Winkelman Dec 2015

Ncpa Propagation Code Users Manual, Andrew T. Winkelman

Physics

This manual was written for University of Alaska Fairbanks infrasound group to assist researchers in using the National Center for Physical Acoustics (NCPA) code suite to further investigate observed infrasonic phenomena. The NCPA code suite is designed to simulate various aspects of infrasound propagation through a model atmosphere. This suite was developed and tested by the University of Mississippi National Center for Physical Acoustics infrasound group. Included are raytrace routines to initially establish signal paths, both single frequency and broadband modal routines to calculate pressure fields and transmission losses, and a parabolic method to calculate pressure fields and transmission losses …

Go to article

Di-Hadron Correlations With Identified Leading Hadrons In 200 Gev Au + Au And D + Au Collisions At Star, James K. Adkins, Renee H. Fatemi, Suvarna Ramachandran, L. Adamczyk, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, A. Aparin, D. Arkhipkin, E. C. Aschenauer, G. S. Averichev, X. Bai Dec 2015

Di-Hadron Correlations With Identified Leading Hadrons In 200 Gev Au + Au And D + Au Collisions At Star, James K. Adkins, Renee H. Fatemi, Suvarna Ramachandran, L. Adamczyk, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, A. Aparin, D. Arkhipkin, E. C. Aschenauer, G. S. Averichev, X. Bai

Physics and Astronomy Faculty Publications

The STAR Collaborationpresents for the first time two-dimensional di-hadron correlations with identified leading hadrons in 200 GeV central Au+Au and minimum-bias d+Au collisions to explore hadronization mechanisms in the quark gluon plasma. The enhancement of the jet-like yield for leading pions in Au + Au data with respect to the d + Au reference and the absence of such an enhancement for leading non-pions (protons and kaons) are discussed within the context of a quark recombination scenario. The correlated yield at large angles, specifically in the ridge region, is found to be significantly higher for leading non-pions than pions. …

Go to article

Commencement Program, December (2015), Minnesota State University Moorhead Dec 2015

Commencement Program, December (2015), Minnesota State University Moorhead

Commencement Programs

No abstract provided.

Go to article

Coarse Bedload Routing And Dispersion Through Tributary Confluences, Kurt Imhoff, Andrew C. Wilcox Dec 2015

Coarse Bedload Routing And Dispersion Through Tributary Confluences, Kurt Imhoff, Andrew C. Wilcox

Geosciences Faculty Publications

Sediment routing fundamentally influences channel morphology and propagation of disturbances. However, the transport and storage of bedload particles in headwater channel confluences, which may be significant nodes of the channel network in terms of sediment routing, morphology, and habitat, is poorly understood. To characterize routing processes through confluences of headwater channels, we investigate how sediment routing patterns through headwater confluences compare to those described in low-gradient gravel bed river systems, and how confluences affect the dispersive behavior of coarse bedload particles compared to non-confluence reaches. We address these questions with a field tracer experiment using passive-integrated transponder and radio-frequency identification …

Go to article

A "Case" Study On Developing Science Communication And Outreach Skills Of University Graduate Student Researchers In Alaska, Molly E. Tedesche, Laura Conner, Jennifer Danielson Dec 2015

A "Case" Study On Developing Science Communication And Outreach Skills Of University Graduate Student Researchers In Alaska, Molly E. Tedesche, Laura Conner, Jennifer Danielson

Research Posters

Well rounded scientific researchers are not only experts in their field, but can also communicate their work to a multitude of various audiences, including the general public and undergraduate university students. Training in these areas should ideally start during graduate school, but many programs are not preparing students to effectively communicate their work. Here, we present results from the NSF-funded CASE (Changing Alaska Science Education) program, which was funded by NSF under the auspices of the GK-12 program. CASE placed science graduate students (fellows) in K-12 classrooms to teach alongside of K-12 teachers with the goal of enhancing communication and …

Go to article

Wsu Board Of Trustees Meeting Minutes, December 17-18, 2015 Dec 2015

Wsu Board Of Trustees Meeting Minutes, December 17-18, 2015

Board of Trustees Minutes

Minutes from the Wright State University Board of Trustees Meeting held on December 17-18, 2015.

Go to article

Dawn Of A New Era, Edwin Smith Dec 2015

Dawn Of A New Era, Edwin Smith

University of Mississippi News

School of Engineering's first female department chair taking CIS to another level

Go to article

The Ecological Importance Of Brachiopods Versus Bivalves In The Paleozoic: Taphonomy, Biomass, And Energy Use, Shannon (Shin-Nan) Hsieh Dec 2015

The Ecological Importance Of Brachiopods Versus Bivalves In The Paleozoic: Taphonomy, Biomass, And Energy Use, Shannon (Shin-Nan) Hsieh

Master's Theses

Brachiopods have commonly been considered more important than bivalves in Paleozoic ecosystems due to their greater global diversity and greater abundance in many fossil assemblages. New sampling-standardized diversity curves verify that brachiopods were more diverse than bivalves at the global level in the Paleozoic; they declined in the Permian-Triassic extinction, largely recovered, then faded away later in the Mesozoic. However, the subordinate ecological status of bivalves within local Paleozoic ecosystems has been challenged on two fronts. First, bivalve abundance may be underestimated due to preferential dissolution of aragonitic shells. Second, bivalve contribution to ecosystem function may be underestimated by abundance …

Go to article

Trophic Pathways Supporting Juvenile Chinook And Coho Salmon In The Glacial Susitna River, Alaska: Patterns Of Freshwater, Terrestrial, And Marine Resource Use Across A Seasonally Dynamic Habitat Mosaic, Kristin M. Rine Dec 2015

Trophic Pathways Supporting Juvenile Chinook And Coho Salmon In The Glacial Susitna River, Alaska: Patterns Of Freshwater, Terrestrial, And Marine Resource Use Across A Seasonally Dynamic Habitat Mosaic, Kristin M. Rine

Biological Sciences

In large, seasonally dynamic and spatially complex watersheds, the availability and relative importance of various food resources for stream fishes can be expected to vary substantially. While numerous studies have attempted to uncover the trophic linkages that support stream salmonids, much of these efforts have occurred at small scales that disregard variability of food resources inherent in lotic systems. This study aimed to determine large-scale patterns in the contributions of freshwater, terrestrial, and marine-derived food resources to juvenile Chinook and Coho salmon (Oncorhynchus tshawytscha and O. kisutch) in the large, glacially influenced Susitna River, Alaska. I quantified diet patterns both …

Go to article

Spectroscopy Of Quasibound And Long-Range Rydberg States Of Ultracold 85rb2, Ryan A. Carollo Dec 2015

Spectroscopy Of Quasibound And Long-Range Rydberg States Of Ultracold 85rb2, Ryan A. Carollo

Doctoral Dissertations

Ultracold atomic physics offers an experimentalist the opportunity to perform sensitive tests and measurements that are not possible at higher temperatures. In this case it allows for access to molecular states, through photoassociation, that are inaccessible to conventional techniques. We use photoassociation to measure quasi-bound levels of the 2 1Σg+ state of 85Rb2 . With these data, we examine a coupling between the short-range Hund’s case (c) 2 (0g+ ) component and the long-range 2 (1g ) state, which corresponds to the 1 1Πg state. A second experiment studies the …

Go to article

Self-Efficacy Of Middle School Teachers Responsible For Teaching Struggling Readers, Alison Burdick Dec 2015

Self-Efficacy Of Middle School Teachers Responsible For Teaching Struggling Readers, Alison Burdick

Doctoral Dissertations

This qualitative study answers questions about school reform by utilizing professional learning for teachers who lack self-efficacy to teach reading to middle school students. The findings included higher self-efficacy and lower burnout rates for teachers. Implications from this study include a model for professional learning that recognizes teachers as adult learners and a system of professional development that provides daily opportunities for teachers to work together over problems of practice.

Go to article

An Examination Of The Factors And Characteristics That Contribute To The Success Of Putnam Fellows, Robert A. J. Stroud Dec 2015

An Examination Of The Factors And Characteristics That Contribute To The Success Of Putnam Fellows, Robert A. J. Stroud

Doctoral Dissertations

The William Lowell Putnam Mathematical Competition is an intercollegiate mathematics competition for undergraduate college and university students in the United States and Canada and is regarded as the most prestigious and challenging mathematics competition in North America (Alexanderson, 2004; Grossman, 2002; Reznick, 1994; Schoenfeld, 1985). Students who earn the five highest scores on the examination are named Putnam Fellows and to date, despite the thousands of students who have taken the Putnam Examination, only 280 individuals have won the Putnam Competition. Clearly, based on their performance being named a Putnam Fellow is a remarkable achievement. In addition, Putnam Fellows go …

Go to article

Approximate Bayesian Computation For Probabilistic Decline Curve Analysis In Unconventional Reservoirs, Mohit Paryani Dec 2015

Approximate Bayesian Computation For Probabilistic Decline Curve Analysis In Unconventional Reservoirs, Mohit Paryani

Engineering

Predicting the production rate and ultimate production of shale resource plays is critical in order to determine if development is economical. In the absence of production from the Shublik Shale, Alaska, Arps' decline model and other newly proposed decline models were used to analyze production data from oil producing wells in the Eagle Ford Shale, Texas. It was found that shales violated assumptions used in Arps' model for conventional hydrocarbon accumulations. Newly proposed models fit the past production data to varying degrees, with the Logistic Growth Analysis (LGA) and Power Law Exponential (PLE) models making the most conservative predictions and …

Go to article

Three Dimensional Computational Fluid Dynamics Models Of Fugitive Dust Dispersion In High-Latitude Open-Pit Mines, Taraprasad Bhowmick Dec 2015

Three Dimensional Computational Fluid Dynamics Models Of Fugitive Dust Dispersion In High-Latitude Open-Pit Mines, Taraprasad Bhowmick

Engineering

The Arctic region contains vast mineral resources and mining of these resources is a major activity in several countries, including the United States. With the advancement of open-pit mining technology, the depth to which minerals can be profitably mined has increased, resulting in deeper pits than ever before. This increase in depth has several inherent challenges for mining operations. The ventilation of an open-pit mine is mostly dependent on natural airflow patterns. The dispersion behavior of the pollutants generated in a mine is also dependent on the atmospheric conditions. The control of fugitive dust in high-latitude open-pit mines is challenging …

Go to article

Iodp Expedition 347baltic Sea Basin Paleoenvironment And Biosphere, Thomas Andrén, Bo Barker Jørgensen, Carol Cotterill, Sophie Green, Elinor Andrén, Jeanine L. Ash, Thorsten Bauersachs, Barry Cragg, Anne-Sophie Fanget, Annick Fehr, Wojciech Granoszewski, Jer­Oen Groeneveld, Dalton S. Hardisty, Emilio Herrero-Bervera, Outi Hyttinen, Jørn Bo Jensen, Sean Johnson, Michael Kenzler, Aarno Kotilainen, Ulrich Kotthoff, Ian Pg Marshall, E. Martin, S. Obrochta, Sandra Passchier, Nadine B. Quintana Krupinski, Natascha Riedinger, Caroline Slomp, Ian Snowball, Anna Stepanova, Sarah Strano Dec 2015

Iodp Expedition 347baltic Sea Basin Paleoenvironment And Biosphere, Thomas Andrén, Bo Barker Jørgensen, Carol Cotterill, Sophie Green, Elinor Andrén, Jeanine L. Ash, Thorsten Bauersachs, Barry Cragg, Anne-Sophie Fanget, Annick Fehr, Wojciech Granoszewski, Jer­Oen Groeneveld, Dalton S. Hardisty, Emilio Herrero-Bervera, Outi Hyttinen, Jørn Bo Jensen, Sean Johnson, Michael Kenzler, Aarno Kotilainen, Ulrich Kotthoff, Ian Pg Marshall, E. Martin, S. Obrochta, Sandra Passchier, Nadine B. Quintana Krupinski, Natascha Riedinger, Caroline Slomp, Ian Snowball, Anna Stepanova, Sarah Strano

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

The Integrated Ocean Drilling Program (IODP) expedition 347 cored sediments from different settings of the Baltic Sea covering the last glacial-interglacial cycle. The main aim was to study the geological development of the Baltic Sea in relation to the extreme climate variability of the region with changing ice cover and major shifts in temperature, salinity, and biological communities. Using the Greatship Manisha as a European Consortium for Ocean Research Drilling (ECORD) mission-specific platform, we recovered 1.6 km of core from nine sites of which four were additionally cored for microbiology. The sites covered the gateway to the North Sea and …

Go to article

Pathological Brain Detection By A Novel Image Feature—Fractional Fourier Entropy, Shuihua Wang, Yudong Zhang, Xiaojun Yang, Ping Sun, Zhengchao Dong, Aijun Lu, Ti-Fei Yuan Dec 2015

Pathological Brain Detection By A Novel Image Feature—Fractional Fourier Entropy, Shuihua Wang, Yudong Zhang, Xiaojun Yang, Ping Sun, Zhengchao Dong, Aijun Lu, Ti-Fei Yuan

Publications and Research

Aim: To detect pathological brain conditions early is a core procedure for patients so as to have enough time for treatment. Traditional manual detection is either cumbersome, or expensive, or time-consuming. We aim to offer a system that can automatically identify pathological brain images in this paper.Method: We propose a novel image feature, viz., Fractional Fourier Entropy (FRFE), which is based on the combination of Fractional Fourier Transform(FRFT) and Shannon entropy. Afterwards, the Welch’s t-test (WTT) and Mahalanobis distance (MD) were harnessed to select distinguishing features. Finally, we introduced an advanced classifier: twin support vector machine (TSVM). Results: A 10 …

Go to article

Studies In The History Of Anthropology In The United States, Jay H. Bernstein Dec 2015

Studies In The History Of Anthropology In The United States, Jay H. Bernstein

Publications and Research

I will talk about a study I did on the first persons to do Ph.D.s in anthropology and how the project led to my leaving the anthropology profession and becoming a librarian. The project began in a biographical study of a little-known anthropologist that involved archival work. As a librarian who has left the profession of anthropology (not without trauma), I remain keenly interested in the history and bibliography of anthropology and view dissertation projects as crucial to understanding the biographies of scholars and trends in academic professions.

Go to article

Resource Competition, Space Use And Forage Ecology Of Sea Otters, Enhydra Lutris, In Southern Southeast Alaska, Zachary N. Hoyt Dec 2015

Resource Competition, Space Use And Forage Ecology Of Sea Otters, Enhydra Lutris, In Southern Southeast Alaska, Zachary N. Hoyt

Fisheries

The growing sea otter population in southern Southeast Alaska is impacting commercial shellfish, through foraging and expanding in range and abundance except where hunted for subsistence. Sea otters and their prey have coexisted in the North Pacific Ocean for approximately 750,000 years, but due to exploitation of sea otters from the 1770s until 1911, the species became extinct over much of its range, including southern Southeast Alaska. Subsequently, invertebrate species flourished and were commercially targeted in the late 1900s. Sea otters were relocated (n = 106) to southern Southeast Alaska in 1968. In this dissertation, I evaluated this marine mammal-fisheries …

Go to article

Using Self-Organizing Maps To Detail Synoptic Connections Between Climate Indices And Alaska Weather, Reynir C. Winnan Dec 2015

Using Self-Organizing Maps To Detail Synoptic Connections Between Climate Indices And Alaska Weather, Reynir C. Winnan

Atmospheric Sciences

Seasonal forecasts for Alaska strongly depend on the phases of Pacific Decadal Oscillation (PDO), El Niño-Southern Oscillation (ENSO), and warm water in the North Pacific called the North Pacific Mode or more popularly the "Pacific blob." The canonical descriptions of these climate indices are based on seasonal averages, and anomalies that are based on a long-term mean. The patterns highlight general geographical placement and display a sharp contrast between opposing phases, but this may be misleading since seasonal averages hide much of the synoptic variability. Self-organizing maps (SOMs) are a way of grouping daily sea level pressure (SLP) patterns, over …

Go to article

Geology And Origins Of The Peak Gold-Copper-Silver Skarn Deposit, Tok, Alaska, Peter Edward Illig Dec 2015

Geology And Origins Of The Peak Gold-Copper-Silver Skarn Deposit, Tok, Alaska, Peter Edward Illig

Geosciences

The distal Peak Au-Cu skarn deposit was discovered in 2012 on Tetlin native lands 15 miles southeast of Tok, Alaska. The deposit contains anomalous Au-Cu-Bi-Ag-Mo-Fe-Te-As-Pb-Co-W-Cd-Ni. At the time of drilling deposit style, mineralization and origin were not understood. Upper Paleozoic and older metamorphic rocks had been previously mapped in the area; however, no igneous or metasomatic rocks had been recognized. To better understand the deposit I created a 1:25,000 scale geologic map of the 25 km² exploration area; employed approximately 682,500 assays for metal ratios; described textures and minerals in 138 polished thin sections; employed approximately 3,000 meters of new …

Go to article

Sea-Ice Habitat Preference Of The Pacific Walrus (Odobenus Rosmarus Divergens) In The Bering Sea: A Multiscaled Approach, Alexander Edward Sacco Dec 2015

Sea-Ice Habitat Preference Of The Pacific Walrus (Odobenus Rosmarus Divergens) In The Bering Sea: A Multiscaled Approach, Alexander Edward Sacco

Geosciences

The goal of this thesis is to define specific parameters of mesoscale sea-ice seascapes for which walruses show preference during important periods of their natural history. This research thesis incorporates sea-ice geophysics, marine-mammal ecology, remote sensing, computer vision techniques, and traditional ecological knowledge of indigenous subsistence hunters in order to quantitatively study walrus preference of sea ice during the spring migration in the Bering Sea. Using an approach that applies seascape ecology, or landscape ecology to the marine environment, our goal is to define specific parameters of ice-patch descriptors and mesoscale seascapes in order to evaluate and describe potential walrus …

Go to article

Data To Decisions For Cyberspace Operations, Steve Stone Dec 2015

Data To Decisions For Cyberspace Operations, Steve Stone

Military Cyber Affairs

In 2011, the United States (U.S.) Department of Defense (DOD) named cyberspace a new operational domain. The U.S. Cyber Command and the Military Services are working to make the cyberspace environment a suitable place for achieving national objectives and enabling military command and control (C2). To effectively conduct cyberspace operations, DOD requires data and analysis of the Mission, Network, and Adversary. However, the DOD’s current data processing and analysis capabilities do not meet mission needs within critical operational timelines. This paper presents a summary of the data processing and analytics necessary to effectively conduct cyberspace operations.

Go to article

The Newton Fellowship Award Project (British Academy-Funded), Mary Mcateer Dec 2015

The Newton Fellowship Award Project (British Academy-Funded), Mary Mcateer

i.e.: inquiry in education

No abstract provided.

Go to article

Using A Disciplinary Literacy Framework To Teach High School Physics: An Action Research Study, Brian P. Hurley, Michael P. Henry Dec 2015

Using A Disciplinary Literacy Framework To Teach High School Physics: An Action Research Study, Brian P. Hurley, Michael P. Henry

i.e.: inquiry in education

This action research study investigated the impact of teaching physics using a disciplinary literacy framework for instruction across all units in one academic year. Through a suite of vocabulary strategies and lessons that encourage students to write, speak, draw, mathematically translate, and design experiments, students learn to do physics by approximating problems and tasks like physicists. The data from this study suggests that students who exhibit these physicist-like disciplinary literacy behaviors may perform better on math-based assessments so long as they employ disciplinary literacy strategies while problem solving. By teaching via a disciplinary literacy framework, the classroom may become more …

Go to article

First Prev Next Last