Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 37 for “"STK"”.
-
Analysis of a CubeSat Orbit Using STK
… Orbit (SSO) missions using Systems Tool Kit (STK). The study focuses on analyzing communication, power generation, and radiation exposure while considering various factors. The analysis is based on the 3U CubeSat called UT-ProSat-1, developed by students at Virginia Polytechnic Institute and …
-
Investigating the Roles of the Stk Locus in Development, Motility and Exopolysaccharide Production in Myxococcus Xanthus
… screens identified transposon insertions at the stk locus. In particular, StkA, a DnaK homolog, was identified as a possible negative regulator of EPS production by a stkA transposon insertion that suppressed a pilA mutation. A stkB transposon insertion was found to have diminished EPS production …
-
Economic Potash Fertilizer Rate Recommendations
… considered the initial soil test level of K (STK) and yield response information, as traditional recommendations do, and added crop price and the cost of fertilizer. Profit maximum occurs where the marginal revenue from additional yield is equal to the marginal cost of applying an additional …
-
Evaluation of SpermTracker paper and spray for the visualization of seminal stains
… this study, two presumptive tests for semen, STK® SpermTracker-Lab and STK® SpermTracker-Spray were compared to each other and the existing Acid Phosphatase Spot Test (AP-Spot) to assess their efficacy for visualizing seminal stains. Six different commonly encountered substrates varying in …
-
Structural Basis of Signal Transduction within Environmental Sensing PAS Regulated Ser/Thr Kinases
… (<strong>STKs</strong>). PAS domains achieve their regulatory control by internally binding small molecule ligands/cofactors (e.g., O<sub>2</sub> binding to heme in FixL; flavins within the …
-
CubeSat Constellation Analysis for Data Relaying
… the spatial and temporal analysis features of STK, coupled with the STK/Matlab interface a robust tool was created to analyze the performance of CubeSat constellations based on a store-and-forward communications model which is not currently supported by the STK Engine. Utilizing the Connect …
-
Topsoil thickness impact on corn, soybean, and switchgrass productivity and soil nutrient management
… cm) soil samples for soil test P (STP) and K (STK) were collected in 2009, 2015, and 2016. Fertilizer was applied shortly after the sampling using the University of Missouri's buildup recommendation. Across all years, relative yield increased 27 and 15 percentage points as DTC increased from 0 …
-
Control System Design and Simulation of Spacecraft Formations
… data, which are exported to Satellite Tool Kit (STK) to create animations. The process by which Matlab is used to produce the data and how the data are used to produce a 3-D animation in STK is explained. Finally, various formation scenarios are modeled using this same process.</p>
-
Multiscale decomposition of spatial lattice data for hotspot prediction
… regression spatio-temporal Kriging (GTWR-STK) method to forecast COVID-19 cases to a next time step. The GTWR-STK method is applied to spatial lattice data where the spatio-temporal variogram is estimated by extending the proposed variogram for spatial lattice data. Hotspots are predicted …
-
Lýsingarhönnun borðsala : ferðaþjónusta - viðbygging
… áskorunin í þessu verkefni. Þeir innihalda 84 stk. af ljósaperum og ósk er um að hægt sé að leika sér með liti til að líkja eftir stjörnuhimni. Höfundur vill jafnvel ganga lengra og skapa nokkurs konar norðurljósa stemningu. Hönnuð verður rafmagnsteikning með raflögnum, ljósaplani og brunakerfi …
-
Preliminary Design of an Asteroid Hopping Mission
… and then optimized using Satellite Tool Kit (STK) 9.s's Design Explorer Optimizer [1]. Next, the spacecraft was design using commercially available parts that would support the mission requirements. The Variable Specific Impulse Magnetoplasma Rocket (VASIMR) was and instrumental piece in …
-
Control System Design and Simulation of Spacecraft Formations via Virtual Formation Approach
… via Matlab are exported to Satellite Tool Kit (STK) to create 3D animations. Various formation scenarios are modeled and the formation control strategies studied in this thesis are applied for switching from one formation scenario to another.</p>
-
Development of Simultaneous Transformation Kinetics Microstructure Model with Application to Laser Metal Deposited Ti-6Al-4V and Alloy 718
… model uses simultaneous transformation kinetics (STK) theory to predict the transformation of one parent phase into several products. The model uses calculated thermodynamic properties of the alloys for portions of the respective transformation characteristics. Being a phenomenological model there …
-
Effects of Corn (Zea mays L.) Stover Removal and Leaching on Soil Test and Whole Plant K Levels in Corn and K Fertilization/High-Input Treatments on Soybean Using Site-Specific Management to Increase Soybean (Glycine max) Production in South Dakota
… on water soluble and exchangeable soil test K+ (STK) levels and corn grain yields across a five-year period. Abundant K+ reserves were recorded between the initial and final sampling periods. While corn grain yields were affected by removing corn biomass, exchangeable and solution K+ levels were …
-
Determining the effects of phosphorylation on AFAP-110 function
… to the amino acid stretch 266--294 within STK region of AFAP-110. There are four PKC candidate phosphorylation sites in this region; they are being substituted by alanine residues in order to determine their significance in serine/threonine phosphorylation regulation of AFAP-110 …
-
Reconfigurable satellite constellations for geo-spatially adaptive Earth observation missions
… approaches by utilizing Satellite Tool Kit (STK) simulations and Earth observation mission databases. This thesis investigates the design and optimization of ReCon in low Earth orbits. A multidisciplinary simulation model is developed, to which optimization techniques are applied for both …
-
Nitrogen and Potassium Dynamics of Selected Indiana Soils
… study about effects of moisture on soil test K (STK) levels, we found that soils with initially high exchangeable K concentrations fixed K upon drying, while soils with initially low exchangeable K concentration released K upon drying. The equilibrium soil K level at which no change in STK occurs …
-
Analysis of Low-Energy Lunar Transfers in a High-Fidelity Dynamics Model
… model to simulate these trajectories. STK Astrogator was used to recreate the NASA GRAIL trajectory; and from the recreated trajectory, a nominal trajectory absent of mid-course corrections was established. This nominal trajectory was used to perform parametric and variational studies …
-
Enhancing the feeding value of corn crop residues to improve beef cattle production
… corn stalklage, harvested at 40% DM and ensiled (STK), 3) corn stalklage plus Silo-King (STKL; Silo-King, Agri-King, Inc., Fulton, IL at 0.25 kg/ton), or 4) corn stalklage plus Silage SAVOR Plus (STKP; Silage SAVOR Plus, Kemin Industries, Inc., Des Moines, IA at 0.5 kg/ton). Corn stover (71.5% …
-
Theoretical and Experimental Investigation of Attitude Control for Underactuated Spacecraft
… two magnetorquers is explored. SEET library in STK is utilized to obtain an accurate geomagnetic field model to model the space environment. Then, the use of two reaction wheels along the principal axes of the spacecraft to perform an attitude correction maneuver is studied using …
Page 1 of 2