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.
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Showing 1 to 20 of 28 for “"Sprayer"”.
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Design of sprayer boom suspensions through computer simulation and design optimization
Control of the movement of the field sprayer boom will directly enhance uniform deposition of chemicals. Means are necessary to insure that the boom structure supporting the spray applicators follows low frequency ground slope changes and to insure attenuation of high frequency signals from the …
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Evaluation of the performance of granular fertilizer boom sprayer through computational fluid-particles-dynamid CFD simulation and scaled-down model analysis
… two Japanese made granular fertilizer boom sprayers to test it on Malaysia’s Paddy field. In order to confirm the local feasibility of this fertilizer applicator, they had called UTHM researchers for proper experimental and numerical evaluations. A year of experimental assessments, the …
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Modeling and Simulation of a Chemical Injection System
… However, its impact on the performance of sprayers is not well understood. Although the behavior of chemical injection systems in constant-rate application has been studied intensively, little research has been documented on how control systems impact sprayer performancein the context of …
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Automatic Control of Chemical Application Rate With Soil Organic Matter and Travel Speed as Inputs (Microprocessor, Digital Control)
… contamination. A microprocessor based sprayer control system was developed to regulate chemical application rate according to the soil organic matter content and sprayer ground speed. Bypass nozzles were used to maintain uniform spray characteristics over a wide range of flow rates. The …
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Control of Herbicide Sprayers With Soil Organic Matter as an Input (Illinois)
A digital control system for agricultural field sprayers was designed using bypass nozzles to minimize changes in spray pattern and drop size. Sprayer travel speed and the organic matter in the soil under the sprayer were the design inputs. Step, impulse and sinusoidal demands on the system were …
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System interface challenges in combining mature technologies with rigid architectures
… GPS vehicle control for agricultural fertilizer sprayers into an existing platform for sports turf maintenance spraying via the John Deere ProGator with Select Spray sprayer attachment. Agricultural GPS control systems and the ProGator turf sprayer are long-running legacy products of differing …
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Sensing and Control for Real-Time Machine Vision-Based Selective Herbicide Application Under Outdoor Field Conditions
… controlled based on the distance traveled by sprayer vehicle a way of directing the herbicide onto the weeds when they are sensed by the sensing system. A design methodology for this ""real-distance"" control was developed and the system was tested under controlled outdoor field conditions. It …
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The factors and protocols that influence, accuracy, precision and uncertainty of accurate mass measurements by FT-ICR ms to validate the assignment of elemental composition
… the use of ion population balancing using a dual sprayer approach to reduce MME. Population balancing between sample ions and calibrant ions can reduce the MME 40-fold. Ion populations across a chromatographic run can also vary greatly. The dual sprayer can also be employed to easily control the …
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Assessing Spray Deposition and Weed Control Efficacy from Aerial and Ground Equipment in Managed Turfgrass Systems
… transect perpendicular to an ASD or ground sprayer spray swath resolved that increasing ASD operational height increases drift and effective swath width while effective application rate, total deposition, and smooth crabgrass control by quinclorac herbicide decreases. Deposition under the …
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Interactive Effects of Imazapyr plus Triclopyr Ester and Imazapyr plus Glyphosate Mixtures on Woody Weed Seedlings
… applied to woody weed seedlings. Using a booth sprayer, 66 herbicide treatments were applied to greenhouse grown black cherry (Prunus serotina), winged elm (Ulmus alata), sweetgum (Liquidambar styraciflua), red maple (Acer rubrum), black locust (Robinia psuedoacacia), loblolly pine (Pinus …
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Study of Skin Friction and Surface Regression Interaction via the Naphthalene Sublimation Technique
… was coated with naphthalene via a mechanized sprayer and was installed in the wall of the Ahmic Aerospace Turbulent Boundary Layer Research supersonic wind tunnel. The plate and sensor configuration was subjected to three subsequent tunnel runs at Mach 2.31. This process was repeated at plenum …
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Deep Learning Based Crop Row Detection
… system in collaboration with an agricultural sprayer company. Our proposed method takes the output of semantic segmentation using U-net, and then apply a clustering based probabilistic temporal calibration which can adapt to different fields and crops without the need for retraining the …
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Surfactant Formulations to Enhance Triclopyr Amine Efficacy: Effects on Adhesion, Retention and Contact Phytotoxicity On Three Hardwood Species
… of the selected species under field and track-sprayer conditions and to determine whether leaf characteristics (wax character and leaf angle ) could explain adhesion / retention. Garlon 4, Garlon 3A and Triclopyr TEA + sequestrant (each at 0.32%, 1.6% and 3.2% ae) plus various concentrations of …
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Utilizing spring dead spot mapping to assess precision management strategies, topographical epidemiology, economic opportunities
… treatments showed that a GNSS-equipped sprayer, used for precision applications, provided cost savings over a 10-year horizon when applying isofetamid or a combination product of pydiflumetofen + azoxystrobin + propiconazole. Conversely, this strategy was not cost-effective with annual …
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Investigations of Bacteria Viability on Surfaces Using ω-functionalized Alkanethiol Self-Assembled Monolayers
… sprayed onto the surfaces using a chromatography sprayer. After addition of growth agar and overnight incubation, the number of colony forming units on the surface were counted. Statistical analyses were performed to compare the number of colony forming units on different surfaces. Surfaces were …
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Efficacy of Herbicide Combination on Burley and Dark-Air Cured Tobacco
… were applied on June 1, 2000 with a CO2 backpack sprayer. Six treatments were applied to both burley and dark air-cured plots. Sulfentrazone was applied alone and in combination with either clomazone, pendimethalin, or napropamide. A sulfentrazone + clomazone combination followed by sethoxydim, as …
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Effects of simulated drift of glyphosate, imazethapyr, glufosinate, and imazamox to non-transgenic rice
… applied with a tractor-mounted CO2-pressurized sprayer. Glyphosate reduced plant height and primary and total crop yield, with the greatest reduction in primary crop yield resulting from glyphosate applied at boot. Primary crop rice seed germination was reduced by glyphosate. Glyphosate reduced …
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Enhanced Electrospray Ionization for Mass Spectrometry and Ion Mobility Spectrometry
… in focusing and transporting ions from the ESI sprayer tip into the sampling nozzle of the MS. The separation time in IMS, based on differing gas phase ion mobilities, ranges from several hundred microseconds to milliseconds. This allows faster analysis than most other conventional separation …
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Evaluating the Efficacy of Targeted Pesticide Applications and Machine Learning Integration for Precision Turfgrass Management
… Global Navigation Satellite System (GNSS)-guided sprayers to apply pesticides solely to pest-affected areas as opposed to traditional broadcast pesticide applications. However, significant barriers have hindered the widespread adoption of these practices. A prominent limiting factor to the …
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Direct analysis of dried blood spot samples
… sampling. It was demonstrated that using the IS sprayer enabled the IS to integrate sufficiently with the DBS sample prior to extraction to nullify HCT based recovery bias. The direct elution mechanism was also optimised with a view to maximising assay sensitivity while retaining acceptable …
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