Theses and Dissertations at Montana State University (MSU)
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Item Extraction of droplet genealogies from high-fidelity atomization simulations(Montana State University - Bozeman, College of Engineering, 2019) Rubel, Roland Francis Clark, IV; Chairperson, Graduate Committee: Mark OwkesMany research groups are performing high-fidelity simulations of atomizing jets that are taking advantage of the continually increasing computational resources and advances in numerical methods. These high-fidelity simulations produce extremely large data-sets characterizing the flow and giving the ability to gather a better understanding of atomization. One of the main challenges with these data sets is their large size, which requires developing tools to extract relevant physics from them. The main goal of this project is to create a physics extraction technique to compute the genealogy of atomization. This information will characterize the process of the coherent liquid core breaking into droplets and ligaments which may proceed to break up further. This event information will be combined with detailed information such as droplet size, shape, flow field characteristics, etc. The extracted information will be stored in a database, allowing the information to be readily and quickly queried to assist in the development and testing of low-fidelity atomization models that agree with the physics predicted by high-fidelity simulations.Item Mitigating software engineering costs in distributed ledger technologies(Montana State University - Bozeman, College of Engineering, 2018) Heinecke, Jonathan Taylor; Chairperson, Graduate Committee: Mike WittieDistributed ledger technologies (DLTs) are currently dominating the field of distributed systems research and development. The Ethereum blockchain is emerging as a popular DLT platform for developing software and applications. Several challenges in Ethereum software development are the complex nature of working with DLTs, the lack of tools for developing on this DLT, and poor documentation of concepts for DLT developers. In this thesis, we provide building blocks that reduce the complexity of DLT operations and lower the barrier to entry into DLT development. We do this by providing a Node.js library, Ethereum-Easy, that simplifies operations on Ethereum. We implement this library into a sample application called Rock, Paper, Scissors (RPS) and built a continuous delivery, continuous integration pipeline for deploying Ethereum code (Jenk-Thereum). This thesis aims to make development on DLTs easier, quicker, and less expensive.Item Anomaly detection through spatio-temporal data mining, with application to near real-time outlying sensor identification(Montana State University - Bozeman, College of Engineering, 2017) Galarus, Douglas Edward; Chairperson, Graduate Committee: John Paxton; Rafal A. Angryk (co-chair)There is a need for robust solutions to the challenges of near real-time spatio-temporal outlier and anomaly detection. In our dissertation, we define and demonstrate quality measures for evaluation and comparison of overlapping, real-time, spatio-temporal data providers and for assessment and optimization of data acquisition, system operation and data redistribution. Our measures are tested on real-world data and applications, and our results show the need and potential to develop our own mechanisms for outlier and anomaly detection. We then develop a representative, near real-time solution for the identification of outlying sensors that far outperforms state of the art methods in terms of accuracy and is computationally efficient. When applied to a real-world, meteorological data set, we identify numerous problematic sites that otherwise have not been flagged as bad. We identify sites for which metadata is incorrect. We identify observations that have been mislabeled by provider quality control processes. And, we demonstrate that our method outperforms enhanced versions of state of the art methods for assessment of accuracy using comparable or less computation time. There are many quality-related problems with real data sets and, in the absence of an approach like ours, these problems may have largely gone unidentified. Our approach is novel for the simple but effective way that it accounts for spatial and temporal variation, and that it addresses more than just accuracy. Collectively these contributions form an overarching data-mining framework and example that can be used and extended for data-mining method development, model building and evaluation of spatio-temporal outlier and anomaly detection processes.Item Homogeneity measurements in parent-child webpage relationships(Montana State University - Bozeman, College of Engineering, 2002) Livingood, BejaminItem A web-based interface for the NeuroSys database project(Montana State University - Bozeman, College of Engineering, 2004) Howard, Stuart W.; Chairperson, Graduate Committee: John PaxtonThis paper describes and documents the implementation of a web-based interface for an existing database application. In response to the demand for managing and storing large amounts scientific data, programmers at the Center for Computational Biology at Montana State University have developed client-side software that allows a user to access, edit, and query a remote database. To use this application the client computer must have a current version of Java installed, the application must be downloaded, and browser settings may need to be adjusted. While many of the end users are computer savvy, the setup process challenges other end users. The goal of this project was to develop a server-side, web-based interface for the application that allows users to browse, query, and edit a database by simply visiting a website and logging in. Principles of good design for user interfaces and interactive systems are reviewed and the resulting system is compared with three other database applications using these design principles as criteria. Results of the comparisons are summarized and recommendations for future work on the project are made.Item Air quality decision support system for portable sources(Montana State University - Bozeman, College of Engineering, 2004) Dartman, JackAir quality permits are issued for both stationary and portable sources of emissions. The Prototype Air Quality Decision Support System (AQDSS) discussed in this paper has limited its scope to portable sources to simplify the development process. Examples of portable sources are: Asphalt & Cement Concrete Batch Plants, and Crushing & Screening Plants. Portable Sources of Air Pollution are Subject to Various State and Federal Permitting Requirements Dependant Upon: the quantity and nature of emissions, the date of manufacture of equipment, the proposed location(s) and dates of operation, the hours of operation, as well as other factors that the decision support system (DSS) must address. An AQDSS for portable sources should accept air quality permit application data, and model the data to generate a recommendation. AQDSS permit recommendations are: Issue an Air Quality Permit (for a Portable Source), Issue with Permit Restrictions (Emission Limits, Hours of Operation Limits, Production Limits, ....), Application Incomplete - Request Additional Information, Do Not Issue Permit, Does Not Require Permit, Requires Operating Permit. An objective of this project, secondary to satisfying the requirements of a Master of Science Degree, was to construct a prototype AQDSS that attempts to satisfy the needs (requirements) of the Montana Department of Environmental Quality (DEQ), Air Resources Management Bureau. With that perspective in mind, the AQDSS was intended to facilitate the issuance of air quality permits for portable sources, with the goal of improving DEQ response time and reducing engineer review time. The AQDSS should also, when fully completed, provide an opportunity for an air quality permit applicant to complete and submit an application online. A working prototype can also provide a useful template to expand the DSS to other types of source categories, as well as facilitate communication between the DEQ and the regulated community.