the dramatic increasing of sea-freight container transportations and the developing trend for using containers in the multimodal handling systems through the sea, rail, road and land in the present market cause some challenges to the general managers of container terminals such as increasing demand, competitive situation, new investments and expansion of new activities and the need to use new m...

An accurate means of determining and correcting for daily patient setup errors is important to the cancer outcome in radiotherapy. While many tools have been developed to detect setup errors, difficulty may arise in accurately adjusting the patient to account for the rotational error components. A novel, automated method to correct for rotational patient setup errors in helical tomotherapy is p...

Closed-Loop Control of a 3D Printer Gantry Benjamin McKittrick Weiss Chair of the Supervisory Committee: Associate Professor Duane Storti Mechanical Engineering The use of closed-loop control to improve performance in gantry robots is a wellestablished technology, but adding the necessary sensors and computational hardware to low-cost 3D printer gantries has been generally thought to either be ...

This paper presents an internal model-based approach for trajectory tracking in the discrete time-varying setting. A newly designed parallel kinematics servo gantry is well suited for high precision contouring at high speed ranges. The discrete time-varying internal model-based control is developed for controlling the servo gantry system to track complicated trajectories generated by linear tim...

A gantry is required for the PAMELA project using non-scaling Fixed Field Alternating Gradient (NS-FFAG) magnets. The NS-FFAG principle offers the possibility of a gantry much, lighter and cheaper than conventional designs, with the added ability to accept a wide range of fast changing energies. This paper will build on previous work to investigate a design which could be used for the PAMELA pr...

When optimizing variable dose rate VMAT (VDR) beams, the leaf positions and the MU of each control point are optimized simultaneously (Figure 1). Since the MU is not allowed to be individually optimized for each control point for a constant dose rate VMAT (CDR) beam (Figure 2), it is likely that the plan quality is reduced compared to a VDR beam with the same angle settings. To obtain a good qu...

The difference between dual-gantry and single-gantry surface-mount placement (SMP) machines is that exhibit higher complexity more problems due to their additional gantry robot, such as component allocation collision. This paper presents algorithms prescribe the assembly operations of a multi-head machine. It considers five inter-related problems: (i) allocation; (ii) automatic nozzle changer a...

Volumetric-modulated arc therapy (VMAT) has been shown to be able to deliver plans equivalent to intensity-modulated radiation therapy (IMRT) in a fraction of the treatment time. This improvement is important for patient immobilization/localization compliance due to comfort and treatment duration, as well as patient throughput. Previous authors have suggested commissioning methods for this moda...

Abstract According to the production requirements of a packaging line in distillery, this article designed suction tray gantry with width 1922mm, length 5000mm, and height 940mm using Solidworks software. Through ANSYS Workbench, performance advantages disadvantages made structural steel aluminum alloy under maximum load 100Kg required by enterprise are analyzed. Finally, through comparison the...

Varian Halcyon 2.0 linear accelerator was launched and became available for clinical use in 2018. Therefore, it is necessary to evaluate the accuracy of exit fluence quality assurance (QA) head neck cancer treatment planning, pretreatment, treatment. The twenty plannings has been evaluated by conducting gamma analysis QA pretreatment each field composite using criteria index 3 %/3 mm 2 %/2 mm. ...