Global ETD Search

161	How Are NASA Engineers Motivated? An Analysis of Factors that Influence NASA Goddard Engineers’ Level of Motivation Kea, Howard Eric January 2008 (has links) No description available. African Americans Behaviorial Sciences Engineering Gender Management Organizational Behavior engineers NASA intrinsic motivation extrinsic motivation work motivation multiple regression factor analysis workplace engineering profession Hygiene Factors 2 Factor Theory scientists government employees African-Americans women engineers
162	Space Weather Simulation Model Integration Molin, Alice, Johnstone, Julia January 2023 (has links) Space weather is the field within the space sciences that studies how the Earths magnetosphere is influenced by the Sun. The Sun is constantly emitting dangerous radiation and plasma which in some cases can affect or damage the systems on Earth. Scientists have an interest in studying this interaction and therefore visualizations of space weather data are useful. OpenSpace is an interactive software that visualizes the entire known universe with real-time data. OpenSpace supports a range of different visualization methods and techniques, for this work, the relevant visualization tools are field lines and cut planes. GAMERA is a simulation model that simulates a wide range of situations where plasma is subjected to the influence of magnetic fields, the simulations are based on curvilinear grids. This project focuses on implementing data from GAMERA into OpenSpace. OpenSpace already supports a variety of different simulation models, although none that uses curvilinear grids for the data. The curvilinear grid can adapt to the specific shape and geometry of the data, allowing for more accurate data representation. The project aims to create a pipeline for reading data files from simulation runs and visualize it as field lines and cut planes. The files used in this project contain data suitable for volumes and field lines. The method was to first develop a reader to extract and manage desired data from HDF5 files in which the simulation data is stored. The data used to visualize field lines is rendered with an already existing component in OpenSpace. Secondly, a slice operation was developed to extract cut planes from the files containing data for volume visualization, these are then visualized with the help of a component for rendering cut planes which was developed during this work. The work led to a pipeline that reads and manages simulation data from GAMERA and the data is successfully visualized. However, there is room for improvement in color rendering, robustness and level of user interaction during runtime. / <p>Examensarbetet är utfört vid Institutionen för teknik och naturvetenskap (ITN) vid Tekniska fakulteten, Linköpings universitet</p> simulation model OpenSpace GAMERA HDF5 NASA space weather magnetosphere field lines cut plane curvilinear grids data extraction integration visualization hierarchical data format textures transfer function Medicinsk teknik Medicinsk teknik Media and Communication Technology Medieteknik
163	INTERIOR ENVIRONMENT MODELING FOR RESILIENT EXTRA-TERRESTRIAL HABITATS Amanda J Lial (14212901) 06 December 2022 (has links) <p> </p> <p>There are several challenges that occur when creating extraterrestrial structures that are not relevant to terrestrial applications. The Resilient Extra-Terrestrial Habitat Institute is a NASA funded research project focused on developing resilient lunar habitats. In order to develop these deep-space structures, many considerations have to be made to account for scenarios that are not relevant to Earth. Such scenarios include meteorite impacts, moonquakes, radiation, and moon dust accumulation. To observe possible consequences of these disruptions, RETHi established a modular coupled virtual testbed to monitor the effects of different deep-space related situations. MCVT is a computer model of a lunar habitat that uses a system-of-systems approach to examine the impacts of these scenarios. Currently, MCVT is developing methods to confront these extraterrestrial situations by utilizing robotic agents and expanding upon a variety of safety responses to increase resiliency. RETHi also utilizes a cyber physical testbed to run cyber-physical experiments to validate the approaches used in MCVT. </p> <p><br></p> <p>One of the numerous models in MCVT is the Habitat Interior Environment Model. HIEM monitors the interior environment of the lunar structure using physics-based calculations and inputs from its surroundings. There are three main disturbances that directly affect the interior environment—fire within the dome, meteorite impacts, and airlock failure. Such scenarios either increase or decrease the temperature and pressure. This data is then forwarded to other subsystems for further evaluation. HIEM can be remodeled to fit the pressure box in the cyber physical testbed. By doing so, it is then possible to validate the pressure leakage calculations used in HIEM using experimental data. HIEM is specifically designed to the lunar habitat currently in development; however, the model can be refitted to a variety of applications such as terrestrial, aerospace, space, and marine. </p> Models and simulations of design Modelling and simulation lunar habitats temperature change pressure change measurements interior environments simulation deep space Resiliency Purdue University
164	Site Characterization of Phase Instability via Interferometer Measurement Zemba, Michael J. January 2013 (has links) No description available. Electrical Engineering Electromagnetics Electromagnetism Aerospace Engineering Engineering Antenna Arrays Phase Noise Atmospheric Phase Instability Propagation Measurements Interferometry NASA Ka-Band Radio Frequency Electrical Engineering Electromagnetics Antennas Propagation Site Test Interferometer
165	A THEORETICAL ADAPTIVE AUTONOMY MODEL:REAL-TIME PHYSIOLOGICAL ASSESSMENT OF COGNITIVE WORKLOAD Evans, Dakota C. January 2014 (has links) No description available. Industrial Engineering Physiological Psychology Experiments
166	Measurement of Adhesion Forces in CM2 Meteorite Materials Zeszut, Zoe 30 August 2017 (has links) No description available. Geology Geological Mineralogy geology geological sciences planetary sciences asteroid asteroids meteorite meteorites cm2 carbonaceous asteroid c type asteroid adhesion cohesion force NASA YORP measurements analog analogue regolith mineral serpentine mineralogy
167	Dialogs of Peace in Protection of Life: A Comparative Case Study of a Nonviolence Method by the Indigenous Guards of the Regional Indigenous Council of Cauca in the Post-Peace Accord Context (2016-2021) in Colombia / Diálogos de Paz en Protección de la Vida: Un estudio de caso comparativo del método de la no-violencia de la Guardia Indígena del Consejo Regional Indígena del Cauca en el contexto del post-acuerdo de paz (2016-2021) en Colombia Clase Hagman, Mimmi January 2021 (has links) The Peace Agreement of 2016 between the Colombian government and the Revolutionary Armed Forces of Colombia - People's Army raised hopes after decades of internal armed conflict, but the levels of violence continue to be high in rural areas. Cauca is the department of Colombia where most social leaders and human rights defenders have been killed since 2016. To resist violence, to defend life and the territories, and to uphold rule of law based on the 1991 Colombian Constitution, the Indigenous Guards of the Regional Indigenous Council of Cauca use an integral method of nonviolence in the everyday setting. The aim of this study is to understand the impact of this method, perceived by the local people, as an alternative way to create peace in Colombia with concepts defined by Johan Galtung. With a decolonial research approach, an exemplifying qualitative comparative case study with fieldwork for the data collection has been carried out in Cauca, to give voice to and learn from the local communities. The results show a complex situation of an uneven progress of conflict transformation within the department, with significant economic inequalities. The challenges of cyclical war on a small scale are occurring, as in the case of the Proyecto Nasa in the Municipality of Toribío. At once, the possibilities of using this method to break the cycles of war through the power of asymmetry have occurred by conflict resolutions of dialogs with armed actors, as in the case of the resguardo of Paletará in the Municipality of Puracé Coconuco. It is claimed that by strengthening the institution of the Indigenous Guards, the collective actions of peacekeeping and peacebuilding in the territories can improve the process of conflict transformation by revitalizing the implementation of the 2016 Peace Agreement with its territorial focus and the ethnic chapter. / El Acuerdo Final de Paz de 2016 entre el Gobierno Colombiano y las Fuerzas Armadas Revolucionarias de Colombia - Ejército del Pueblo elevó la esperanza tras décadas del conflicto armado interno, pero los niveles de violencia siguen siendo altos en las zonas rurales. El Cauca es el departamento de Colombia donde la mayoría de los lideres sociales y los defensores de derechos humanos han sido asesinados desde 2016. Para resistir a la violencia, para defender la vida y los territorios, y para mantener el Estado de Derecho basado en la Constitución Política de Colombia de 1991, el Consejo Regional Indígena del Cauca utiliza un método integral de la no-violencia en el entorno cotidiano. El objetivo de este estudio es comprender el impacto de este método, percibida por la población local, como una vía alternativa para crear paz en Colombia con conceptos definidos por Johan Galtung. Con un enfoque de investigación decolonial, un estudio de caso comparativo con trabajo de campo para la recolección de datos ha sido realizado en el Cauca, para dar voz y aprender de las comunidades locales. Los resultados muestran una situación compleja con un progreso irregular de la transformación del conflicto dentro del departamento con disparidades significativas económicas. Los desafíos con una guerra cíclica a una pequeña escala están ocurriendo; como es el caso de Proyecto Nasa en el Municipio de Toribío. A la vez, las posibilidades con el uso de este método para romper con los ciclos de guerra a través del poder asimétrico han ocurrido por la resolución de conflicto con diálogos con actores armados; como en el caso del Resguardo de Paletará en el Municipio de Puracé Coconuco. Se afirma que, por el fortalecimiento de la institución de la Guardia Indígena, las acciones colectivas del mantenimiento de la paz y la consolidación de la paz en los territorios pueden mejorar el proceso de transformación del conflicto, revitalizando la implementación del Acuerdo Final de Paz de 2016 con el enfoque territorial y el capítulo étnico. Colombia Peace Agreement of 2016 Ethnic Chapter Territorial Focus Cauca Department Violence Nonviolence Method Peace Regional Indigenous Council of Cauca Indigenous Guards Kiwe Thegnas Cyclical War Power of Asymmetry Conflict Resolution Conflict Transformation Dialogs Puracé Coconuco Resguardo of Paletará Toribío Proyecto Nasa Colombia Acuerdo Final de Paz de 2016 Capítulo Étnico Enfoque Territorial Departamento del Cauca Violencia Método de la No-violencia Paz Consejo Regional Indígena del Cauca Guardia Indígena Kiwe Thegnas Guerra Cíclica Poder Asimétrico Resolución de Conflicto Transformación del Conflicto Diálogos Puracé Coconuco Resguardo de Paletará Toribío Proyecto Nasa Other Humanities not elsewhere specified Övrig annan humaniora
168	Interaktionskvalitet - hur mäts det? Friberg, Annika January 2009 (has links) Den tekniska utvecklingen har lett till att massiva mängder av information sänds, i högahastigheter. Detta flöde måste vi lära oss att hantera. För att maximera nyttan av de nyateknikerna och undkomma de problem som detta enorma informationsflöde bär med sig, börinteraktionskvalitet studeras. Vi måste anpassa gränssnitt efter användaren eftersom denneinte har möjlighet att anpassa sig till, och sortera i för stora informationsmängder. Vi måsteutveckla system som gör människan mer effektiv vid användande av gränssnitt.För att anpassa gränssnitten efter användarens behov och begränsningar krävs kunskaperom den mänskliga kognitionen. När kognitiv belastning studeras är det viktigt att en såflexibel, lättillgänglig och icke-påträngande teknik som möjligt används för att få objektivamätresultat, samtidigt som pålitligheten är av största vikt. För att kunna designa gränssnittmed hög interaktionskvalitet krävs en teknik att utvärdera dessa. Målet med uppsatsen är attfastställa en mätmetod väl lämpad för mätning av interaktionskvalitet.För mätning av interaktionskvalitet rekommenderas en kombinering av subjektiva ochfysiologiska mätmetoder, detta innefattar en kombination av Functional near-infraredspecroscopy; en fysiologisk mätmetod som mäter hjärnaktiviteten med hjälp av ljuskällor ochdetektorer som fästs på frontalloben, Electrodermal activity; en fysiologisk mätmetod sommäter hjärnaktiviteten med hjälp av elektroder som fästs över skalpen och NASA task loadindex; en subjektiv, multidimensionell mätmetod som bygger på kortsortering och mäteruppfattad kognitiv belastning i en sammanhängande skala. Mätning med hjälp av dessametoder kan resultera i en ökad interaktionskvalitet i interaktiva, fysiska och digitalagränssnitt. En uppskattning av interaktionskvalitet kan bidra till att fel vid interaktionminimeras, vilket innebär en förbättring av användares upplevelse vid interaktion. / Technical developments have led to the broadcasting of massive amounts of information, athigh velocities. We must learn to handle this flow. To maximize the benefits of newtechnologies and avoid the problems that this immense information flow brings, interactionquality should be studied. We must adjust interfaces to the user because the user does nothave the ability to adapt and sort overly large amounts of information. We must developsystems that make the human more efficient when using interfaces.To adjust the interfaces to the user needs and limitations, knowledge about humancognitive processes is required. When cognitive workload is studied it is important that aflexible, easily accessed and non assertive technique is used to get unbiased results. At thesame time reliability is of great importance. To design interfaces with high interaction quality,a technique to evaluate these is required. The aim of this paper is to establish a method that iswell suited for measurement of interaction quality.When measuring interaction quality, a combination of subjective and physiologicalmethods is recommended. This comprises a combination of Functional near-infraredspectroscopy; a physiological measurement which measures brain activity using light sourcesand detectors placed on the frontal lobe, Electrodermal activity; a physiological measurementwhich measures brain activity using electrodes placed over the scalp and NASA task loadindex; a subjective, multidimensional measurement based on card sorting and measures theindividual perceived cognitive workload on a continuum scale. Measuring with these methodscan result in an increase in interaction quality in interactive, physical and digital interfaces.An estimation of interaction quality can contribute to eliminate interaction errors, thusimproving the user’s interaction experience. interaction cognitive workload interaction quality measure measurement interaktion kognitiv belastning interaktionskvalitet mätning mäta kvalitet quality EEG Electroencephalography elektroencefalografi SWAT Subjective workload assessment technique NASA TLX NASA task load index pupil dilation Modified Cooper Harper Scale MCH skalan Modified Cooper Harper Skalan MCH scale mätmetoder measures subjektiv objektiv subjective objective Skin conductivity response Heart rate variability Functional near- infrared spectroscopy SCR HRV fNIRS kommunikation communication kognition cognition teknikstödd kommunikation ansikte mot ansikte kommunikation face to face interaktivitet information interactivity workload arbetsbelastning cognitive kognitiv Diagnosticity sensitivity upplösning mätinstrument känslighet utvärdering analys utvärderingsprocedur metod method kalibrering calibration Engineering and Technology Teknik och teknologier
169	An empirical statistical model relating winds and ocean surface currents : implications for short-term current forecasts Zelenke, Brian Christopher 02 December 2005 (has links) Graduation date: 2006 / Presented on 2005-12-02 / An empirical statistical model is developed that relates the non-tidal motion of the ocean surface currents off the Oregon coast to forecasts of the coastal winds. The empirical statistical model is then used to produce predictions of the surface currents that are evaluated for their agreement with measured currents. Measurements of the ocean surface currents were made at 6 km resolution using Long-Range CODAR SeaSonde high-frequency (HF) surface current mappers and wind forecasts were provided at 12 km resolution by the North American Mesoscale (NAM) model. First, the response of the surface currents to wind-forcing measured by five coastal National Data Buoy Center (NDBC) stations was evaluated using empirical orthogonal function (EOF) analysis. A significant correlation of approximately 0.8 was found between the majority of the variability in the seasonal anomalies of the low-pass filtered surface currents and the seasonal anomalies of the low-pass filtered wind stress measurements. The U and the V components of the measured surface currents were both shown to be forced by the zonal and meridional components of the wind-stress at the NDBC stations. Next, the NAM wind forecasts were tested for agreement with the measurements of the wind at the NDBC stations. Significant correlations of around 0.8 for meridional wind stress and 0.6 for zonal wind stress were found between the seasonal anomalies of the low-pass filtered wind stress measured by the NDBC stations and the seasonal anomalies of the low-pass filtered wind stress forecast by the NAM model. Given the amount of the variance in the winds captured by the NAM model and the response of the ocean surface currents to both components of the wind, bilinear regressions were formed relating the seasonal anomalies of the low-pass filtered NAM forecasts to the seasonal anomalies of the low-pass filtered surface currents. The regressions turned NAM wind forecasts into predictions of the seasonal anomalies of the low-pass filtered surface currents. Calculations of the seasonal cycle in the surface currents, added to these predicted seasonal anomalies, produced a non-tidal estimation of the surface currents that allowed a residual difference to be calculated from recent surface current measurements. The sum of the seasonal anomalies, the seasonal cycle, and the residual formed a prediction of the non-tidal surface currents. The average error in this prediction of the surface currents off the Oregon coast remained less than 4 cm/s out through 48 hours into the future. CODAR High-frequency (HF) radar surface Current NAM Kosro Bilinear regressions Ocean Oceanography Empirical Statistical Wind Oregon Radio Forecast COAS Coastal physical Predict EOF Mapping Buoy GLOBEC NASA NSF Seasonal Low-pass filtered Stress Marine Winds -- Oregon -- Pacific Coast
170	NASA på Nya äventyr i rymden : Populariseringen av den amerikanska visionen om rymden Nord, Johan January 2008 (has links) The purpose of this thesis is to bring forward and discuss the American vision for space exploration found at NASA's homepage, how the vision is popularised and why. NASA's homepage is analyzed as popularized science and the theoretical perspective emanates from the field of popular science and especially the work of Johan Kärnfelt. The historical reference is made up by Howard E McCurdy and he's thoughts about space and the American imagination. The analysis is based on a number of documents that popularize the vision for space exploration and is intended for the public. These documents describe the future plan for NASA and US space exploration. / Syftet med denna uppsats är att undersöka hur de amerikanska rymdvisionerna gestaltats på NASA:s hemsida, hur dessa populariseras samt vilka de bakomliggande drivkrafterna kan tänkas vara. NASA:s hemsida kommer att ses som populariserad vetenskap och det teoretiska perspektivet utgår från den populärvetenskapliga genren där en stor del av det teoretiska underlaget utgår från docenten Johan Kärnfelts tankar om populariseringen av vetenskap. Som historisk referens används professor Howard E. McCurdys tankar om den amerikanska rymdvisionen. Materialet som ingår i analysen är hämtat från NASA:s hemsida. Samtliga dokument handlar om den amerikanska visionen om rymden och USA:s fortsatta aktiviteter i rymden. Space NASA Rymdresor Kalla kriget Race to the Moon kapplöpning månen Utforskning Kolonisering The Frontier Kreationsmyten The American Creation myth Space program Howard E McCurdy Michael Godhe Rymden Populärvetenskap USA Visionen om rymden New Vision for Space Exploration Space and the American Imagination George W Bush Kulturarv och kulturproduktion

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