Materials with a strong spin Hall effect and Rashba-Edelstein effect have the potential to improve the efficiency of solid-state magnetic memory technologies and other magnetic logic devices. Heavy metals have been identified as having these properties, including the beta crystal phase of tungsten. In this work, we determine the strength...
Measuring instrument precision/repeatability is one variance component in a measurement system. Assessing measuring instrument precision is necessary to evaluate its capability for a particular application. Well-known approaches for assessing precision/repeatability rely on repeated measurements of items. However, a destructive measurement destroys measured items, so that repeated measurements are not possible....
A model of the Oregon State TRIGA reactor was developed in Serpent 2 by translating a previously accepted MCNP model. Both models were verified and validated via comparison of each model and data gathered from the core start-up. Reactivity bias in each code was determined. Using the rod drop method,...
This thesis presents an experimental study of radial porosity in a manually filled cylindrical container with glass spheres. The symmetric distribution of bead diameter allowed for normalization of container properties and porosity models. The aspect ratio of the container was approximately 3.9, with tube-to-particle-diameter ratio λ ≈ 24.6 and height-to-particle-diameter...
Rates of sediment transport were determined using tracer gravel and a RFID antenna array at Oak Creek (Oregon) to compare a new method with an existing transport relation created from data previously collected in the same study reach. Close to 3,000 tracers were deployed throughout the study reach and were...
Hyperspectral images consist of intensity measurements associated with a large number of EM wavelengths per pixel. When a pixel contains a single material, the measurements of the pixel match the spectral signature of the material. When multiple materials are present in a single pixel, spectral mixing occurs, and signatures of...
Wind energy has become a crucial resource in sustainably meeting increasing global energy demands. Recently, offshore wind energy has been gaining traction due to its higher gross resource and larger unclaimed real-estate relative to its onshore counterpart. Floating offshore wind turbines (FOWTs) are increasingly popular, particularly designs with semisubmersible platforms....
Null networks are a type of random graph that is favored for the analysis of a wide variety of real-world networks, including gene-regulatory networks, food webs, and species co-occurrence matrices. As a hypothesis-generating tool, null networks are invaluable because they can reveal network motifs and unusual large-scale properties of networks...
In the Columbia Basin, pre-plant soil fumigation is commonly used in potato production for pest control, but fumigation can kill non-target organisms within the soil, result in unintended shifts in the microbial community, and disrupt long-term soil health. Cover crops have been shown to strongly influence the numbers and communities...
In recent years, model-free Deep Reinforcement Learning (RL) has become an increasingly popular alternative to more traditional model-based or optimization-based control methods in solving robotic legged locomotion. However, deploying RL in the real world can be a significant undertaking. Constructing reward functions which compel controllers to learn the desired behavior...
Dual use pasture systems, sometimes referred to as dual purpose pasture systems, take advantage of the land being used to maximize multiple outputs from a single area. Developing a system to support both production of grazing livestock as well as pollinator health is of increasing importance in pasture-based farming systems....
Cryptographic systems are used for secure communications in the government, in industry, and by individuals. Many cryptographic systems base their security on our inability to factor quickly. For this reason, in the last few decades several fast factoring algorithms have been developed. The Quadratic Sieve is one of the best...
With the strong shift toward network-centric cluster-computing workload management has become increasingly important in both industrial and academic environments. To fully harness the distributed computing resources of the 32 PC's in our department, I developed a workload monitoring system together with a few utilities for users to submit either sequential...
A video server is the multimedia equivalent of a data file server. As video goes digital video servers that support digital media are required for production and broadcasting in television companies. Grass Valley Group provides comprehensive digital video solutions through a range of video servers called Profiles.
The Profile Media...
The purpose of this paper is to discuss some of the theory of Boolean matrices and apply this theory to construct contact networks by using algebraic methods.
The first section of this paper (Chapter I to III) describes Boolean algebra and its properties, the theory of Boolean matrices, and the...
The general problem of classroom scheduling is well known to be NP-complete. A typical classroom scheduling problem is that of assigning students to a limited number of pieces of laboratory equipment. Frequently several identical pieces of equipment are available only at fixed hours and have limited access due to physical...
The purpose of this project is to study the benefit at large parking lots having shuttle busses by providing a system that dynamically routes a shuttle. The shuttle route will be set by the placement of the travelers returning from the terminal. A parking space is assigned to the incoming...
The problem addressed in this paper is that of usability of the Petri Net Editor used to create applications in the Objex framework. This editor puts a lot of burden on the user, in that the user needs to remember all the GUI resources previously created for the application, has...
Interoperability is the ability to enable different systems to work together and exchange data. Interoperability between different systems is achieved by using common standards and specifications. This paper talks about our research work on interoperability in Calendaring and Scheduling. There are many calendaring and scheduling software products on the market...
Caesar is an interactive graphic editor that is used to generate layouts for VLSI circuits. It runs on a VAX-11 /780 under the UNIX operating system with Berkeley extensions. Caesar has a unique and simple user interface. Phled is an enhanced version of Caesar that runs on a M68000-based engineering...
Current approaches to presentation of mathematics (on paper or in electronic format have usability drawbacks that make learning and appreciation of mathematics challenging and often frustrating. In a framework of a big research project of identifying new approaches to communicating mathematical ideas in a highly usable and effective manner, we...
A structural active-object systems (SAOS) is a, transition-based object-oriented system consisting of a collection of interacting structural active objects (SAOs), which can be structurally and hierarchically composed from their component SAOs. The behaviors of SAOs are determined by the transition statements provided in their class definitions. Various concurrent systems such...
Real time delivery of products is the context of stochastic demands and multiple vehicles is a difficult problem as it requires the joint investigation of the problems in inventory control and vehicle routing. We model this problem in the framework of Average reward Reinforcement Learning (ARL) and present experimental results...
Since its introduction in 1995 by Sun Microsystems, the Java programming language has been widely accepted by the software development community. Besides being a natural fit for Internet and World Wide Web (WWW) based applications, Java is also being used in other diverse application areas due to its simplicity, reduced...
Structure Query Language (SQL) is widely used to access data stored in relational database systems. Although a powerful and flexible language, SQL can also be complex and hard to learn. For most new SQL users, it's easy to write SQL statement by following SQL grammar and syntax rules, but it's...
Common bean (Phaseolus vulgaris L.) comes in a huge assortment of fresh and dried varieties, including snap beans, kidney beans, and pinto beans. Together, these and other market classes provide a third of the daily dietary protein in some cultures, particularly in Africa, Asia, and developing nations in the Americas....
Deep learning is now being utilized widely in applications where sensitive data is being used for model training, for example, in health care. In this scenario, any data leakage will cause privacy concerns to whose data records are used to train the model. An attacker can actively cause privacy leakage...
Excavation of pit feature 110 (F110) at the Cooper’s Ferry site (10IH73) in central Idaho provides a unique snapshot of the domestic lifeways associated with the Western Stemmed Tradition (WST). Analysis was conducted of the F110 assemblage to better understand the function F110 served. The contents of F110 include Canis...
Buddleja davidii (butterfly bush) is a highly adaptable landscape plant known for pollinator attraction. Unfortunately, it is also regarded as an invasive plant in highly disturbed environments across the globe. It is an invasive species in Oregon, officially classified as a class B noxious weed in 2004. Currently the state...
New capabilities in wireless network security are now possible through deep learning, which can identify and leverage patterns in radio frequency (RF) data. One area of deep learning, known as open set detection, is focused on detecting data instances from new devices encountered during deployment that were not previously seen...
Micro-plankton are a crucial component of pelagic food webs, responding rapidly to environmental changes, and providing a first step in the acquisition and transfer of nutrients to life in the ocean. In addition to the uptake of carbon, phytoplankton provide essential fatty acids (FAs) that can limit the growth of...
Black stain root disease (BSRD) is a vascular wilt disease of conifers caused by three varieties of the native, insect-vectored fungal pathogen, Leptographium wageneri (L. wageneri var. wageneri, L. wageneri var. ponderosum, and L. wageneri var. pseudotsugae). Although morphological, physiological, and ecological characteristics differ among the three varieties of L....
Sugar pine and western white pine are widely distributed, economically valuable, and ecologically important native tree species in North America. However, white pine blister rust (WPBR), caused by a non-native fungal pathogen, Cronartium ribicola J.C. Fisch. in Rabh., has substantially affected populations of these species. Cronartium is an obligate parasite,...
Transmit beamforming is an important technique employed to improve efficiency and signal quality in wireless communication systems by steering signals towards their in- tended users. It often arises jointly with the antenna selection problem due to various reasons, such as limited number of radio frequency (RF) chains and energy/resource effi-...
Growing concerns over the rise of anthelmintic resistant populations of gastrointestinal nematodes (GINs) have led producers to look for alternative means of treatment. These sentiments have been echoed by organic producers, who are restricted from the use of synthetically derived anthelmintics in the US. Chicory has emerged as a potential...
Detonation combustion is of great interest for propulsion devices because of its potential to increase thermodynamic efficiency, reduce the weight of current gas turbine engines, and rapidly accelerate to high Mach numbers. Detonation engines might also have the ability to decrease harmful exhaust products from traditional propulsion methods. In order...
Power can be defined as the ability to influence the processes, decisions, and outcomes of an activity in favor of the will of a strong actor and its allies. Strategic actions in situations where there is asymmetric power can change the result of decisions. In this research, I will examine...
This thesis addresses a common knowledge gap that was identified amongst the Society of Automotive Engineers (SAE) competition design teams at Oregon State University. Students that join the SAE teams at Oregon State University typically do not have experience using physically collected data during a design process. This leads to...
Climate change, wildfire, timber harvest, and land conversion alter the availability of downed wood in forests of the western United States. Numerous taxa rely on downed wood for temperature and humidity refugia, and downed wood may play a key role in enabling the persistence of climate-sensitive, low-vagility species like terrestrial...
In Oregon, outdoor recreation activities have continued to grow in popularity, as has the overall Latin@ population of the state. With the continual population increase of this ethnic group, researchers have focused on understanding their outdoor recreation habits through an environmental justice lens. This includes accessibility, affordability, and other barriers...
Recent advances in robotics have led to interest in exploring soft robotic technologies as an engineering control for reducing the risk of radiation exposure for workers in the nuclear industry. These emerging “soft” technologies offer many advantages over traditional rigid robotic systems and can perform a wide range of tasks...
Xanthomonas hortorum pv. carotae (Xhc) is an epiphytic, plant pathogenic bacterium that causes the disease bacterial blight of carrot (Daucus carota subsp. sativus). Infection with Xhc can result in blighting of leaves and umbels and reduce quality and yield of carrot seed crops. Carrot production in the United States approaches...
Hydraulic conductivity of hemp stems under water-stress conditions was investigated. When plants face with water-stress conditions, embolies (cavitation) are triggered in xylem channels and water transport from the root to the leaves is affected. The relation between percentage loss of water transfer ability within the xylem channels can be described...
Transportation agencies continuously strive to improve driving quality and highway safety, which are both highly correlated with the level of smoothness of the road. The International Roughness Index (IRI) is a widely adopted, standardized metric calculated from longitudinal profile data collected on the road. Inertial profilers are devices mounted to...
With an ever-growing urban population there is a continued interest in urban agriculture as a viable option to improve access to fresh produce and enhance food security in an increasingly urbanized world. As the primary method of urban agriculture in the United States, community gardens also provide a range of...
Several large-scale marine heatwave events occurred during the last 10 years in the North Pacific. A particular extreme marine heatwave in the North Pacific called the blob created an unprecedented high peak of sea surface temperature (SST) during 2013/14. MHW events had significant impacts on downstream weather and precipitation patterns...