Common Binder Head and Knotter Head Troubles

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Model and Design of a Power Driver for Piezoelectric Stack Actuators

A power driver has been developed to control piezoelectric stack actuators used in automotive application. A FEM model of the actuator has been implemented starting from experimental characterization of the stack and mechanical and piezoelectric parameters. Experimental results are reported to show a correct piezoelectric actuator driving method and the possibility to obtain a sensor-less positioning contro

What Can Spatiotemporal Characteristics of Movements in RAMIS Tell Us?

Quantitative characterization of surgical movements can improve the quality of patient care by informing the development of new training protocols for surgeons, and the design and control of surgical robots. Here, we present a novel characterization of open and teleoperated suturing movements that is based on principles from computational motor control. We focus on the extensively-studied relationship between the speed of movement and its geometry. In three-dimensional movements, this relationship is defined by the one-sixth power law that relates between the speed, the curvature, and the torsion of movement trajectories. We fitted the parameters of the one-sixth power law to suturing movements of participants with different levels of surgical experience in open (using sensorized forceps) and teleoperated (using the da Vinci Research Kit / da Vinci Surgical System) conditions from two different datasets. We found that teleoperation significantly affected the parameters of the power law, and that there were large differences between different stages of movement. These results open a new avenue for studying the effect of teleoperation on the spatiotemporal characteristics of the movements of surgeons, and lay the foundation for the development of new algorithms for automatic segmentation of surgical tasks.Comment: Preprint of an article submitted for consideration in Journal of Medical Robotics Research, \c{opyright} 2017 copyright World Scientific Publishing Company, http://www.worldscientific.com/worldscinet/jmr

Your Sewing Machine - Its Care and Adjustment

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Design and development of auxiliary components for a new two-stroke, stratified-charge, lean-burn gasoline engine

A unique stepped-piston engine was developed by a group of research engineers at Universiti Teknologi Malaysia (UTM), from 2003 to 2005. The development work undertaken by them engulfs design, prototyping and evaluation over a predetermined period of time which was iterative and challenging in nature. The main objective of the program is to demonstrate local R&D capabilities on small engine work that is able to produce mobile powerhouse of comparable output, having low-fuel consumption and acceptable emission than its crankcase counterpart of similar displacement. A two-stroke engine work was selected as it posses a number of technological challenges, increase in its thermal efficiency, which upon successful undertakings will be useful in assisting the group in future powertrain undertakings in UTM. In its carbureted version, the single-cylinder aircooled engine incorporates a three-port transfer system and a dedicated crankcase breather. These features will enable the prototype to have high induction efficiency and to behave very much a two-stroke engine but equipped with a four-stroke crankcase lubrication system. After a series of analytical work the engine was subjected to a series of laboratory trials. It was also tested on a small watercraft platform with promising indication of its flexibility of use as a prime mover in mobile platform. In an effort to further enhance its technology features, the researchers have also embarked on the development of an add-on auxiliary system. The system comprises of an engine control unit (ECU), a directinjector unit, a dedicated lubricant dispenser unit and an embedded common rail fuel unit. This support system was incorporated onto the engine to demonstrate the finer points of environmental-friendly and fuel economy features. The outcome of this complete package is described in the report, covering the methodology and the final characteristics of the mobile power plant

Use of harm reduction strategies in an occupational therapy life skills intervention

Thesis (M.S.)--Boston UniversityObjectives of Study: Harm reduction intervention strategies have the potential to support positive health outcomes. However, no studies have explored how these strategies can be implemented in an occupational therapy intervention. This study addresses this knowledge gap by examining harm reduction strategies that were discussed during group and individual sessions of an occupational therapist-led life skills intervention for people who have a mental illness and are or were homeless. Methods: This study is a secondary analysis of a larger study that used a longitudinal repeated measures design to implement a life skills intervention. This secondary analysis uses a mixed methods design. Qualitative methods were used for data collection and initial analysis. Quantitative methods were then used to analyze differences between settings. Results: Three major themes emerged from the data: Financial, Physical, and Psychosocial Hann Reduction. The most prevalent theme was Financial Harm Reduction. All three themes were present throughout all of the different life skills intervention modules. There was no significant difference in the themes used between settings. Limitations and Recommendations for Further Research: This study was limited to what was documented in the therapy notes. Although the notes may not include every discussion that occurred, these results suggest that harm-reduction strategies can be utilized in an occupational therapy intervention. Additional research is needed to investigate how harm reduction can be implemented in other areas of occupational therapy practice