Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
-
- Belt filter (1)
- Cancellous bone; Distal femur; Apparent modulus; Bone mineral apparent density; Femoral knee components (1)
- Cross-bridge kinetics (1)
- Cytoskeletal (1)
- Dewatering efficiency (1)
-
- Dynamics (1)
- Electrodermal activity (1)
- Guidance systems (1)
- Harvesting (1)
- Left ventricle (1)
- Machine vision (1)
- Microalga (1)
- Mitochondria (1)
- Precision agriculture (1)
- Radar (1)
- Relaxation (1)
- Respiration (1)
- Sarcomere lengthening (1)
- Skin conductance (1)
- Vehicle guidance. (1)
- Velocity-dependence (1)
Articles 1 - 8 of 8
Full-Text Articles in Entire DC Network
A Deep-Learning Framework For Spray Pattern Segmentation And Estimation In Agricultural Spraying Systems, Praneel Acharya, Travis Burgers, Kim-Doang Nguyen
A Deep-Learning Framework For Spray Pattern Segmentation And Estimation In Agricultural Spraying Systems, Praneel Acharya, Travis Burgers, Kim-Doang Nguyen
Mechanical Engineering Faculty Publications
This work focuses on leveraging deep learning for agricultural applications, especially for spray pattern segmentation and spray cone angle estimation. These two characteristics are important to understanding the sprayer system such as nozzles used in agriculture. The core of this work includes three deep-learning convolution-based models. These models are trained and their performances are compared. After the best model is selected based on its performance, it is used for spray region segmentation and spray cone angle estimation. The output from the selected model provides a binary image representing the spray region. This binary image is further processed using image processing …
Vision And Radar Steering Reduces Agricultural Sprayer Operator Stress Without Compromising Steering Performance, Travis A. Burgers, Kelly J. Vanderwerff
Vision And Radar Steering Reduces Agricultural Sprayer Operator Stress Without Compromising Steering Performance, Travis A. Burgers, Kelly J. Vanderwerff
Mechanical Engineering Faculty Publications
Self-propelled agricultural sprayer operators work an average of 15 h d-1 in peak season, and steering is the task that causes the operator the most stress because of the large number of stimuli involved. Automatic guidance systems help reduce stress and fatigue for operators by allowing them to focus on tasks other than steering. Physiological signals like skin conductance (electrodermal activity, EDA) change with stress and can be used to identify stressful events. The objective of this study was to determine if using a commercially available vision and radar guidance system (VSN®, Raven Industries) reduces agricultural sprayer operators’ stress …
Comparison Of Three Commercial Automatic Boom Height Systems For Agricultural Sprayers, Travis A. Burgers, John D. Gaard, Brian J. Hyronimus
Comparison Of Three Commercial Automatic Boom Height Systems For Agricultural Sprayers, Travis A. Burgers, John D. Gaard, Brian J. Hyronimus
Mechanical Engineering Faculty Publications
Automatic boom height systems reduce the variability of agricultural sprayer boom height. Consistent boom height is important for three key reasons: to reduce uneven spray dispersion if the boom is too low, to reduce spray droplet drift if the boom is too high, and to reduce damage to the boom or crop if the boom is too low. No data is available comparing commercial boom height systems. Three leading North American automatic boom height systems were compared: John Deere BoomTrac Pro (System A), Raven AutoBoom® XRT (System B), and Norac UC5TM Passive Roll (System C) on a John Deere R4045 …
Evaluation Of A Novel Finite Element Model Of Active Contraction In The Heart, Xiaoyan Zhang, Zhan-Qiu Liu, Kenneth S. Campbell, Jonathan F. Wenk
Evaluation Of A Novel Finite Element Model Of Active Contraction In The Heart, Xiaoyan Zhang, Zhan-Qiu Liu, Kenneth S. Campbell, Jonathan F. Wenk
Mechanical Engineering Faculty Publications
Finite element (FE) modeling is becoming a widely used approach for the investigation of global heart function. In the present study, a novel model of cellular-level systolic contraction, which includes both length- and velocity-dependence, was implemented into a 3D non-linear FE code. To validate this new FE implementation, an optimization procedure was used to determine the contractile parameters, associated with sarcomeric function, by comparing FE-predicted pressure and strain to experimental measures collected with magnetic resonance imaging and catheterization in the ventricles of five healthy rats. The pressure-volume relationship generated by the FE models matched well with the experimental data. Additionally, …
Mitochondrial Dynamics And Respiration Within Cells With Increased Open Pore Cytoskeletal Meshes, David H. Jang, Sarah C. Seeger, Martha E. Grady, Frances S. Shofer, David M. Eckmann
Mitochondrial Dynamics And Respiration Within Cells With Increased Open Pore Cytoskeletal Meshes, David H. Jang, Sarah C. Seeger, Martha E. Grady, Frances S. Shofer, David M. Eckmann
Mechanical Engineering Faculty Publications
The cytoskeletal architecture directly affects the morphology, motility, and tensional homeostasis of the cell. In addition, the cytoskeleton is important for mitosis, intracellular traffic, organelle motility, and even cellular respiration. The organelle responsible for a majority of the energy conversion for the cell, the mitochondrion, has a dependence on the cytoskeleton for mobility and function. In previous studies, we established that cytoskeletal inhibitors altered the movement of the mitochondria, their morphology, and their respiration in human dermal fibroblasts. Here, we use this protocol to investigate applicability of power law diffusion to describe mitochondrial locomotion, assessment of rates of fission and …
Mice With A Heterozygous Lrp6 Deletion Have Impaired Fracture Healing, Travis A. Burgers, Juan F. Vivanco, Juraj Zahatnansky, Andrew J. Vander Moren, James J. Mason, Bart O. Williams
Mice With A Heterozygous Lrp6 Deletion Have Impaired Fracture Healing, Travis A. Burgers, Juan F. Vivanco, Juraj Zahatnansky, Andrew J. Vander Moren, James J. Mason, Bart O. Williams
Mechanical Engineering Faculty Publications
Bone fracture non-unions, the failure of a fracture to heal, occur in 10%–20% of fractures and are a costly and debilitating clinical problem. The Wnt/β-catenin pathway is critical in bone development and fracture healing. Polymorphisms of linking low-density lipoprotein receptor-related protein 6 (LRP6), a Wnt-binding receptor, have been associated with decreased bone mineral density and fragility fractures, although this remains controversial. Mice with a homozygous deletion of Lrp6 have severe skeletal abnormalities and are not viable, whereas mice with a heterozygous deletion have a combinatory effect with Lrp5 to decrease bone mineral density. As fracture healing closely models embryonic skeletal …
An Experimental Investigation Of Microalgal Dewatering Efficiency Of Belt Filter System, Anjali Sandip, Val H. Smith, Terry N. Faddis
An Experimental Investigation Of Microalgal Dewatering Efficiency Of Belt Filter System, Anjali Sandip, Val H. Smith, Terry N. Faddis
Mechanical Engineering Faculty Publications
The objective of this study was to investigate the microalgal dewatering efficiency of a belt filter system for feed concentrations below 10 g dry wt./L. A prototype belt filtration system designed for 50 g dry wt./L microalgal feed concentration was used for this investigation. The highest concentration of microalgal suspension available for testing on the prototype belt filtration system was 6 g dry wt./L obtained from biomass settling tanks at the Lawrence, Kansas domestic wastewater treatment plant. For preparation of feed suspension with concentrations below 10 g dry wt./L, microalgal cultivation was followed by flocculation. A mixed laboratory culture of …
Compressive Properties Of Trabecular Bone In The Distal Femur, Travis A. Burgers, Jim Mason, Glen Niebur, Heidi L. Ploeg
Compressive Properties Of Trabecular Bone In The Distal Femur, Travis A. Burgers, Jim Mason, Glen Niebur, Heidi L. Ploeg
Mechanical Engineering Faculty Publications
Early loosening and implant migration are two problems that lead to failures in cementless (press-fit) femoral knee components of total knee replacements. To begin to address these early failures, this study determined the anterior–posterior mechanical properties from four locations in the human distal femur. Thirty-three cylindrical specimens were removed perpendicular to the press-fit surface after the surgical cuts on 10 human cadaveric femurs (age 71.5 ± 14.2 years) had been made. Compression testing was performed that utilized methods to reduce the effects of end-artifacts. The bone mineral apparent density (BMAD), apparent modulus of elasticity, yield and ultimate stress, and yield …