Digital Commons Network^™

A Review Of Selected Works By J.S. Bach, Franz Schubert, And Alberto E. Ginastera, Ani Gyulamiryan

Music

No abstract provided.

Numerical Study Of An Exhaust Heat Recovery System Using Corrugated Tubes And Twisted Tape Inserts, Vamsi Krishna Mokkapati

Engineering

Diesel engine generators are the major power source for small communities in cold regions. Diesel generators waste about 1/3 of their fuel energy in the form of heat through exhaust gas. The primary goal of this work is to capture part of the heat from the exhaust and improve the efficiency of the system. A gas to liquid heat transfer performance of a concentric tube heat exchanger with corrugated tubes and twisted tape inserts is investigated by considering its effects on engine performance and economics. This type of heat exchanger is expected to be inexpensive to install and effective in …

Effects Of Permafrost Thaw On Nitrogen Availability And Plant Soil Interaction In A Boreal Alaska Lowland, Rebecca Anne Finger

Biological Sciences

Permafrost thaw in boreal peatlands causes an ecosystem state change as black spruce forests with permafrost transition into saturated, non-forested collapse scar bogs or fens. Previous studies have suggested that permafrost thaw can increase soil nitrogen (N) bioavailability. However, it is unclear whether these changes in N availability are directly related to changes in N pools or mineralization rates in surface soils (active layer dynamics), or whether increasing N can be attributed to N mobilization from thawing permafrost soil organic matter at depth. I examined plant species composition and aspects of N cycling along triplicate permafrost-thaw gradients in interior Alaskan …

Effects Of Snowmobile Noise And Activity On A Boreal Ecosystem In Southcentral Alaska, Timothy Carl Mullet

Biological Sciences

Snowmobiling is a popular winter activity in northern regions of North America. Although snowmobiles are important utility vehicles and serve as a means of outdoor recreation, their activity is known to affect plants and animals. These effects have been a growing concern over the past 20 years as a result of increased snowmobile activity into once inaccessible natural areas. Minimizing the impacts of snowmobiles on biota, preserving the quality and character of wilderness areas, and providing adequate access to snowmobilers for traditional activities has been a challenge for public land managers in Alaska. To address the effects that snowmobiles have …

Experimental And Computational Studies Of Nanofluids, Ravikanth S. Vajjha

Engineering

The goals of this dissertation were (i) to experimentally investigate the fluid dynamic and heat transfer performance of nanofluids in a circular tube, (ii) to study the influence of temperature and particle volumetric concentration of nanofluids on thermophysical properties, heat transfer and pumping power, (iii) to measure the rheological properties of various nanofluids and (iv) to investigate using a computational fluid dynamic (CFD) technique the performance of nanofluids in the flat tube of a radiator. Nanofluids are a new class of fluids prepared by dispersing nanoparticles with average sizes of less than 100 nm in traditional heat transfer fluids such …

Using Experimental Design And Response Surface Methodology To Model Induced Fracture Geometry In Shublik Shale, Venkatasai Sri Poludasu

Engineering

The Triassic Shublik Formation of the Alaska North Slope is a world-class resource rock and has been identified as the major source of many of the conventional hydrocarbon accumulations on the North Slope, including Prudhoe Bay. Recent interest in the Shublik as a potential shale resource play has highlighted the need for robust hydraulic fracture modeling and simulation of the interval, but little geologic information is available because of the remote nature of the region and the complex character of the Shublik. In this study, a methodology was developed for identifying the critical variables needed for accurate planning of a …

Spartan Web Application Firewall, Brian C. Lee

Master's Projects

Computer security is an ongoing issue and attacks are growing more sophisit- cated. One category of attack utilizes cross-site scripting (XSS) to extract confiden- tial data such as a user’s login credential’s without the knowledge of either the user nor the web server by utilizing vulnerabilities on web pages and internet browsers. Many people develop their own web applications without learning about or having good coding practices or security in mind. Web application firewalls are able to help but can be enhanced to be more effective than they currently are at detecting re- flected XSS attacks by analyzing the request …

The Third Law Of Galactic Rotation, Stacy S. Mcgaugh

Faculty Scholarship

I review the connection between dynamics and the baryonic mass distribution in rotationally-supported galaxies. The enclosed dynamical mass-to-light ratio increases with decreasing galaxy luminosity and surface brightness. The correlation with surface brightness appears to be the more fundamental, with the dependence on luminosity following simply from the weaker correlation between luminosity and surface brightness. In addition to this global relation, there is also a local relation between the amplitude of the mass discrepancy and the acceleration predicted by the observed distribution of baryons. I provide an empirical calibration of this mass discrepancy-acceleration relation. The data are consistent with the operation …

Aligning Carbon Fibers In Micro-Extruded Composite Ink, Chaitanya G. Mahajan

Theses

Direct write processes include a wide range of additive manufacturing techniques with the ability to fabricate structures directly onto planar and non-planar surfaces. Most additive manufacturing techniques use unreinforced polymers to produce parts. By adding carbon fiber as a reinforcing material, properties such as mechanical strength, electrical conductivity, and thermal conductivity can be enhanced. Carbon fibers can be long and continuous, or short and discontinuous. The strength of carbon fiber composite parts is greatly increased when the fibers are preferentially aligned. This research focuses on increasing the strength of additively manufactured parts reinforced using discontinuous carbon fibers that have been …

Silicon Doping Profile Measurement Using Terahertz Time Domain Spectroscopy, Chih-Yu Jen

Theses

Doping profiles in silicon greatly determine electrical performances of microelectronic devices and are frequently engineered to manipulate device properties. To support engineering studies afterward, essential information is usually required for physically characterized doping profiles.

Secondary ion mass spectrometry (SIMS), spreading resistance profiling (SRP) and electrochemical capacitance voltage (ECV) profiling are mainstream techniques for now to measure doping profiles destructively. SIMS produces a chemical doping profile through the ion sputtering process and owns a better characterization resolution. ECV and SPR, on the other hand, gauge an electrical doping profile from the free carrier detection in microelectronic devices. The major discrepancy between …

The Double Galaxy Cluster Abell 2465 – Ii. Star Formation In The Cluster, Gary A. Wegner, Devin S. Chu, Ho Seong Hwang

Dartmouth Scholarship

We investigate the star formation rate and its location in the major merger cluster Abell 2465 at z = 0.245. Optical properties of the cluster are described in Paper I. Measurements of the Hα and infrared dust emission of galaxies in the cluster were made with an interference filter centred on the redshifted line at a wavelength of 817 nm and utilized data from the WISE satellite 12 μm band. Imaging in the Johnson U and B bands was obtained, and along with SDSS u and r was used to study the blue fraction, which appears enhanced, as a further …

Research And Inhabited Image (Ria): A Spatial Hypothesis, Sveva Avveduto, Fabio Fornasari

The Transdisciplinary STEAM+ Journal

This paper discusses the possibility of representing research activity as a narrative path starting from an experimentation field. The aim is to test and verify connections between social space and the construction of images of the world through the building and perception of specific language in the narrative dimension of research. The field work we present has been carried out as an installation art in Borromini’s Crypt in Rome, and is the example of rendering the story-dimension of research through a medium, a narrative technology in constant progress and evolution. In this way research activity can be presented as ascent …

U.S. Drought Monitor, December 16, 2014, David Miskus

United States Agricultural Commodities in Drought Archive

Drought map of U.S. for December 16, 2014 (12/16/14) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.

On The Dynamics Of Mesoscale Eddies And Jets In The Presence Of Topography, Changheng Chen

Open Access Dissertations

The discovery of multiple nearly zonal oceanic jets enriches the classical view of mid-latitude ocean circulation, which was thought to be dominated by turbulent eddies and large-scale oceanic gyres. These jets emerge as a result of baroclinic instability and are maintained by baroclinic eddies. Potential importance of interactions of these ocean currents with major topographic features, such as the mid-Atlantic ridge, calls for the studies of the effects of bottom topography on the dynamics of eddies and the eddy-driven jets. The importance of bottom topography in the linear baroclinic instability of zonal flows on the beta-plane is examined by using …

12-16-2014 Higher Education Chancellor Presents Legislative Agenda At Swosu, Southwestern Oklahoma State University

THE BARK ARCHIVE 2014

With the demand for employees who have certificates and degrees continually increasing, college completion remains the top priority in the state of Oklahoma.

Mapping Thunder Sources By Inverting Acoustic And Electromagnetic Observations, J. F. Anderson, J. B. Johnson, R. O. Arechiga, R. J. Thomas

Geosciences Faculty Publications and Presentations

We present a new method of locating current flow in lightning strikes by inversion of thunder recordings constrained by Lightning Mapping Array observations. First, radio frequency (RF) pulses are connected to reconstruct conductive channels created by leaders. Then, acoustic signals that would be produced by current flow through each channel are forward modeled. The recorded thunder is considered to consist of a weighted superposition of these acoustic signals. We calculate the posterior distribution of acoustic source energy for each channel with a Markov Chain Monte Carlo inversion that fits power envelopes of modeled and recorded thunder; these results show which …

2014 Fall Engr333 Project Final Report, John Sherwood, Jonathan Crow, Nicolaas Ourensma, Zak Devries, Andy Frandsen, Jack Kregel, Ryan Rhodes, Connor Vandongen, Schieffer Kwong, Jee Myung Kim, Matthew Deyoung, Jeff Demaagd, Tyler Devries, Doug Faber, Garrick Hershberger, Jake Derooy, Dustin Brouwer, David Evenhouse, Patrick Anderson, Thomas Brown, Ed Smit, Joel Smith, Thane Symens, Kaitlyn Weinstein, Seth Koetje, Nick Memmelaar, Austin Juza, Matt Ramaker, Ryan Demeester, Jordan Newhof, Wes Richards, Josh Vanderbyl

ENGR 333

The net-zero homes project that this class worked on throughout the semester was designed to determine what it would take to bring a home in Grand Rapids, Michigan to the status of net-zero and whether or not it is feasible to do so. The idea behind a net-zero home is to reduce the energy usage in the home, whether it is by lifestyle changes, insulation additions, or by appliance upgrades, and then produce the remaining energy deficit from renewable sources, so that the homeowner has a net usage of zero at the end of the year. This report details the …

Leadership Lessons For The 21st Century: Superintendents' Perspectives, José M. Torres

Keynotes, Speeches, and Lectures

Celebrating 50 years in the educational leadership business, the Institute for Educational Leadership (IEL) asked practitioners from around the country, including dozens of Superintendents, to share their leadership lessons. The responses culminated in ten leadership lessons. We invited two former Superintendents, Dr. Clifford B. Janey and Dr. José M. Torres, to share their reflections of how IEL's leadership lessons connected to their own practice. What they told us is important for all school leaders to know.

IEL Leadership Lesson: Leaders dream of a better world. They ground a shared vision in audacious possibility and practicality.

Social Policies As Subsidy For Environmental Education: A Citizen Behavioral Change Tool, Gracielle Peixoto

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Social Policies as subsidy for Environmental Education: A citizen behavioral change tool

One Tragedy, One Action, Amy Fosler

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

One Tragedy, One Action

Leveling The Financial Playing Field For Renewables, Taylor Nissen

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Leveling the Financial Playing Field for Renewables

Great Economic Growth Versus Sustainability, Maria Brandao

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Great Economic Growth versus Sustainability

It Is Always Possible, Ivan Makino

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

It Is Always Possible

Say No To Natural Gas, Alex Bruening

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Say No to Natural Gas

Iowa Does It Better: Necessary Role Model Needed To Up Nebraska’S Poor Recycling Diversion Rates, Brian Burris

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Iowa Does It Better: Necessary Role Model needed to Up Nebraska’s Poor Recycling Diversion Rates

What The Frack?, Carson Schwalbach

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

What The Frack?

Why Keystone Pipeline Xl Construction Doesn’T Matter Either Way, Melissa Allen

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Why Keystone Pipeline XL Construction Doesn’t Matter Either Way

Biofuels: Good And Bad, Megan Neve

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Biofuels: Good and Bad

A Call For Congressional Climate Action, Calvin Harman

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

A Call for Congressional Climate Action

Potential Biogas Production On Livestock Operations, Mariana Baia

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Potential Biogas Production on Livestock Operations