Stomatal behavior in grapevines has been identified as a good indicator of the water stress level and overall health plant. Microscope images are often used to analyze stomatal plants. However, most current approaches involve manual measurement features. The main aim this research is develop fully automated stomata detection pore method for grapevines, taking microscope input. proposed approach, which employs machine learning image processing techniques, can outperform available...

Free-flying robotic spacecraft play a significant role in the space industry today. Unlike ground-based robots, manipulator motion robot can cause undesirable disturbances to platform, causing its attitude change, potentially disrupting communication and solar energy collection processes as result. Thus, coordinated control of both become essential for successful operations. Though past research has developed dynamic models manipulators, contribution reaction wheels angular momentum entire...

Digital image processing is commonly used in plant health and growth analysis, aiming to improve research efficiency repeatability. One focus analysing the morphology of stomata, with aim better understand regulation gas exchange, its link photosynthesis water use how they are influenced by climatic conditions. Despite key role played these cells, their microscopic analysis largely manual, requiring intricate sample collection, laborious microscope application manual operation a graphical...

Abstract Background Stomata analysis using microscope imagery provides important insight into plant physiology, health and the surrounding environmental conditions. Plant scientists are now able to conduct automated high-throughput of stomata in data, however, existing detection methods sensitive appearance training images, thereby limiting general applicability. In addition, only generate bounding-boxes around detected stomata, which require users implement additional image processing steps...

Space robots have attracted increasing attention for performing, autonomously or telerobotically, on-orbit servicing missions such as repairing, refueling, and upgrading spacecraft; reusing space assets; assembly. The extension of robot application to can release astronauts from risky, time-consuming, expensive extravehicular activities [1]. However, in the microgravity environment, floating base a will be disturbed by robot's arm motion when it approaches manipulates target. spacecraft...

This paper introduces Sliding Mode controller, a non-linear for the implementation of an autonomous quadrotor platform, system. The controller was applied to PixHawk Flight Controller using Ardupilot firmware. simulation testing SITL shows effectiveness before flight. results imply improvement when Control in comparison PID controller. show that there is reduction attitude error with control all and actual hardware results. robustness also tested by adding parameter uncertainties...

This paper presents a Variable Structure Control (VSC) law with gain adaptation mechanism for second order nonlinear dynamic systems which contain parametric uncertainties and external disturbances. The proposed method exhibit improved settling time compared to Sliding Mode (SMC), has the ability converge given set point switching only once. controller achieves this by adapting its in real-time match effects of changing disturbances uncertainties. acceleration system is always directed...

The task of bulldozing has many aspects that need more research before they can be fully automated. This paper presents a new method for calculating path vehicles tasked with pushing multiple objects to goal locations. Unlike previous approaches which either focus on single object, apply both push and pull operations, or operate in discrete domain, this solution works continuous space whilst handling push-only scenario doesn’t use computationally heavy methods find potential planning...

To ensure efficient transportation of large space structures in the future, it has been suggested that they be transported an unassembled and compact form then assembled inorbit using robots. Forces generated during open contact operations have to taken into careful consideration so structural components can successfully acquired by robot. Unlike ground-based robots, free-flying robot base will deviate from its desired orientation when spacecraft comes with elements. This effect on attitude...

This paper presents an Adaptive Variable Structure Control (AVSC) methodology to autonomously control UAV platform known as the Vectored Thrust Aerial Vehicle (VTAV). The proposed algorithm eliminates chattering present in Sliding Mode (SMC), and improves settling time of VTAV system by driving error states a parabolic trajectory towards origin space instead constraining predefined sliding manifold. is also robust external disturbances parametric uncertainties. Simulation results are...

Near-Infrared spectroscopy is used for better vein visualization to make the venipuncture process more efficient. There exist a few models that use said mechanism. However, they are costly, have accuracy and availability issues, limited only certain types of skin tones. Our objectives were develop low-cost mechanism obtaining near-infrared by using image-guided technique, hardware, optimized algorithms, evaluate its efficiency usefulness clinical trial.We tested prototype different...

Background and Aims. The assessment of grapevine trunk disease symptoms is a labour-intensive process that requires experience prone to bias. Methods support the easy accurate monitoring diseases will aid management decisions. Results. An algorithm was developed for dieback due which applied on smartphone mounted vehicle driven through vineyard. Vine images corresponding expert ground truth assessments (of over 13,000 vines) were collected correlated two seasons in Shiraz vineyards Clare...

Abstract Background: Stomata analysis using microscope imagery provides important insight into plant physiology, health and the surrounding environmental conditions. Plant scientists are now able to conduct automated high-throughput of stomata in data, however, existing detection methods sensitive appearance training images, thereby limiting general applicability. In addition, only generate bounding-boxes around detected stomata, which require users implement additional image processing...

Abstract Background: Stomata analysis using microscope imagery provides important insight into plant physiology, health and the surrounding environmental conditions. Plant scientists are now able to conduct automated high-throughput of stomata in data, however, existing detection methods sensitive appearance training images, thereby limiting general applicability. In addition, only generate bounding-boxes around detected stomata, which require users implement additional image processing...

Abstract Background: Stomata analysis using microscope imagery provides important insight into plant physiology, health and the surrounding environmental conditions. Plant scientists are now able to conduct automated high-throughput of stomata in data, however, existing detection methods sensitive appearance training images, thereby limiting general applicability. In addition, only generate bounding-boxes around detected stomata, which require users implement additional image processing...

There is presently no solution to the problem of an autonomous bulldozer pushing mounds material desired goal locations in presence obstacles whilst obeying kinematic constraints bulldozer. Past work has solved some aspects this problem, but not all. This research presents first complete, practical problem. It works by creating a fixed RRT advance, and then during operation connecting poses into using Bezier curves. The algorithm leverages novel data structure for performing nearest...

There is presently no solution to the problem of an autonomous bulldozer pushing mounds material desired goal locations in presence obstacles whilst obeying kinematic constraints bulldozer. Past work has solved some aspects this problem, but not all. This research presents first complete, practical problem. It works by creating a fixed RRT advance, and then during operation connecting poses into using Bezier curves. The algorithm leverages novel data structure for performing nearest...