2,344 research outputs found
Mission Scenario Generation and Characterization to Support Acquisition Decisions for Long Range Precision Fires-Maritime (LRPF-M)
NPS NRP Project PresentationMission Scenario Generation and Characterization to Support Acquisition Decisions for Long Range Precision Fires-Maritime (LRPF-M)Naval Surface Warfare Center (NSWC), Division DahlgrenThis research is supported by funding from the Naval Postgraduate School, Naval Research Program (PE 0605853N/2098). https://nps.edu/nrpChief of Naval Operations (CNO)Approved for public release. Distribution is unlimited.
ANALYSIS OF DOMAIN-SPECIFIC NUCLEAR ONTOLOGY USING MONTEREY PHOENIX BEHAVIOR MODELING
Current nuclear energy ontologies are known to lack a common vocabulary to formally verify nuclear energy data relationships for modeling system behaviors. Idaho National Laboratory (INL) developed the Data Integration Aggregated Model and Ontology for Nuclear Deployment (DIAMOND) ontology to provide a standard vocabulary and taxonomy for identifying data relationships in nuclear energy system models. This thesis conducted an analysis of DIAMOND using a Spent Fuel Pool (SFP) Monterey Phoenix (MP) behavior model. The SFP MP behavior modeling application demonstrated components of and interactions among a spent fuel cooling pool and its environment. The MP behavior model demonstrated a viable approach for analyzing nuclear reactor system behavior consistent with DIAMOND and the ability to generate the exhaustive set of nuclear reactor cooling pool behavior scenarios. The results supported the ability of DIAMOND definitions to be used to organize and structure knowledge about SFPâs normal and off-normal behaviors. The SPF example showed the application of assets, actions, and triggers from DIAMOND to events and relationships in MP. Assets and actions were represented as MP events, and triggers were represented as precedence relations between MP events. This thesis research verified the DIAMOND ontology was implemented correctly in the model from data representative of operationally realistic behavior and the modeling results validated the MP behavior model was well constrained.Idaho National LabCivilian, Department of the Air ForceApproved for public release. Distribution is unlimited
ANALYZING EMERGENT BEHAVIOR OF SUPPLY CHAINS FOR PERSONAL PROTECTIVE EQUIPMENT IN RESPONSE TO COVID-19
The novel coronavirus (COVID-19) revealed weaknesses in supply chains of companies that produce personal protective equipment (PPE), resulting in nationwide shortages. A government-industry collaborative platform between the National Institute for Standards and Technology (NIST) and Helpful Engineering is under development to act as an exchange for material and equipment at each level of the supply chain. The intent of this is to create an online agile production platform (APP) for PPE. There is a need to proactively limit negative interactions with the APP. The creators of the APP constrain bad behavior or abuse of the system using a "bottom up" approach of coding requirements. In tandem, a "top down" approach of the system is modeled using Monterey Phoenix, a behavioral modeling platform. Stakeholders and processes are modeled to show different permutations of interactions. Impossible scenarios are removed with model constraints. The remaining traces are analyzed for emergent behavior and compared with the constraints programmed into the model. Findings of this research include unexpected emergent behavior in two scenarios. One scenario explored delivered quality to the customer, and analysis exposed a gap that allowed counterfeit parts into the APP. The other scenario explored how the APP managed the supply chain. Weaknesses that allowed missed inspections to pass bad parts were also found. The models developed will drive changes that increase confidence in the APP.Outstanding ThesisCivilian, Department of the NavyApproved for public release. Distribution is unlimited
Analysis of Verification and Validation Techniques for Educational CubeSat Programs
Since their creation, CubeSats have become a valuable educational tool for university science and engineering programs. Unfortunately, while aerospace companies invest resources to develop verification and validation methodologies based on larger-scale aerospace projects, university programs tend to focus resources on spacecraft development. This paper looks at two different types of methodologies in an attempt to improve CubeSat reliability: generating software requirements and utilizing system and software architecture modeling. Both the Consortium Requirements Engineering (CoRE) method for software requirements and the Monterey Phoenix modeling language for architecture modeling were tested for usability in the context of PolySat, Cal Poly\u27s CubeSat research program.
In the end, neither CoRE nor Monterey Phoenix provided the desired results for improving PolySat\u27s current development procedures. While a modified version of CoRE discussed in this paper does allow for basic software requirements to be generated, the resulting specification does not provide any more granularity than PolySat\u27s current institutional knowledge. Furthermore, while Monterey Phoenix is a good tool to introduce students to model-based systems engineering (MBSE) concepts, the resulting graphs generated for a PolySat specific project were high-level and did not find any issues previously discovered through trial and error methodologies. While neither method works for PolySat, the aforementioned results do provide benefits for university programs looking to begin developing CubeSats
ASSESSING INTEROPERABILITY BETWEEN BEHAVIOR DIAGRAMS CONSTRUCTED WITH SYSTEMS MODELING LANGUAGE (SYSML) AND MONTEREY PHOENIX (MP)
Systems engineers have long struggled to identify and understand system behaviors in the operational environment. System Modeling Language (SysML) is a graphical language used among systems engineers to relay details of the systemâs design to various stakeholders. Monterey Phoenix (MP) is a behavioral modeling approach and tool utilizing a lightweight formal method and language to generate diagrams and display expected and unexpected emergent system behaviors. Through systematic analysis of SysML and MP behavior models, this research presents recommendations for improving MP in future releases to accommodate SysML compliance. The ability to merge MPâs scope complete event trace generation into a SysML compliant format would provide great insights and benefits into the DOD acquisition process. Findings from this research include several simple additions to MP diagrams that will better align them with SysML standards while preserving MPâs capability to enable identification of emergent behavior early in the design process, when the risks can be addressed before system design features are ever manufactured or tested.National Security Agency (NSA)Outstanding ThesisCivilian, Missile Defense AgencyCivilian, Department of the NavyCivilian, Department of the NavyCivilian, Department of the ArmyApproved for public release. Distribution is unlimited
Design and evaluation of an integrated GPS/INS system for shallow-water AUV Navigation
The major problem addressed by this research is the large and/or expensive equipment required by a conventional navigation system to accurately determine the position of an Autonomous Underwater Vehicle (AUV) during all phases of an underwater search or mapping mission. The approach taken was to prototype an integrated navigation system which combines Global Positioning System (OPS) and Inertial Measurement Unit (IMU), waterspeed and heading information using Kalman filtering techniques. Actual implementation was preceded by a computer simulation to test where the unit would fit into a larger hardware and software hierarchy of an AUV. The system was then evaluated in experiments which began with land based cart tests and progressed to open water trials where the unit was placed in a towed body behind a boat and alternately submerged and surfaced to provide periodic OPS updates to the Inertial Navigation System (INS). Test results and qualitative error estimates indicate that submerged navigation accuracy comparable to that of differential OPS may be attainable for periods of 30 seconds or more with low cost components of a small physical size.http://archive.org/details/designndevaluati1094535102NANAU.S. Navy (U.S.N.) authors
FY87 scientific and technical reports, articles, papers, and presentations
The document presents formal NASA technical reports, papers published in technical journals, and presentations by MSFC personnel in FY87. It also includes papers of MSFC contractors. After being announced in STAR, all of the NASA series reports may be obtained from the National Technical Information Service, 5285 Port Royal Road, Springfield, Va. 22161. The information in this report may be of value to the scientific and engineering community in determining what information has been published and what is available
Software development: A paradigm for the future
A new paradigm for software development that treats software development as an experimental activity is presented. It provides built-in mechanisms for learning how to develop software better and reusing previous experience in the forms of knowledge, processes, and products. It uses models and measures to aid in the tasks of characterization, evaluation and motivation. An organization scheme is proposed for separating the project-specific focus from the organization's learning and reuse focuses of software development. The implications of this approach for corporations, research and education are discussed and some research activities currently underway at the University of Maryland that support this approach are presented
MODELING SYSTEM BEHAVIORAL OF INDIVIDUAL PROCEDURES AT THE TACTICAL LEVEL OF THE MARINE CORPS HUMAN RESOURCE DEVELOPMENT PROCESSâDO HRDP POLICY, PROCEDURES, AND IMS SUPPORT OR HINDER THEMSELVES?
In February 2021, the Marine Corps released its official guidance on the Human Resource Development Process (HRDP). The Marine Corps outlined the HRDP phases of Guidance, Planning, Production, Assignment, and Assessment as co-occurring and continuous operations. Each process within the phases produces vast amounts of qualitative and quantitative data for the Marine Corps. Using Monterey Phoenix to model both the HRDP and Information Management System (IMS) system behaviors supporting the HRDP, I evaluated the Marine Corps' IMS ability to support Talent Management 2030. First, processes designed in the industrial era and carried into the digital age should not persist. This study recommends IT IMS changes to deal with the legacy processes and methodologies from a bygone era. Secondly, this report provides a framework, tools, and examples to conduct process analysis across all administrative functions across the force, allowing Marine Corps leadership to capitalize on efficiencies already gained by Fleet Marine Forces.Captain, United States Marine CorpsApproved for public release. Distribution is unlimited
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