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 38 for “"mechanical device"”.
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A Mechanical Device for Teaching Word Recognition to Young Deaf Children
Made available in DSpace on 2014-12-04T17:34:08Z (GMT). No. of bitstreams: 1 6000176.pdf: 3551389 bytes, checksum: c4be2d44dcf4ddf4aae080c22c514da0 (MD5) Previous issue date: 1959
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A CNS-led intervention to improve rates of respiratory mechanical device-related pressure injuries in critically ill patients : a DNP project
Background: There is a new focus on medical device-related pressure injuries (MDRPI). Endotracheal tubes (ETT) and their fasteners constitute a portion of these injuries and may lessen the quality of life and function of the critically ill patients who suffer from them. Local Problem The purpose of …
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Development of a Coaxiality Indicator
… examines feasibility of a manually-operated, mechanical device combined with formulae to indicate coaxiality of a test specimen. The author designs, fabricates, and tests the system for measuring coaxiality of holes machined in a steel test piece. Gage Repeatability and Reproducibility (gage …
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Study of behaviour of Biomechanical System in indented Articular Cartilage on a cellular level
The study of biomechanical systems is of great interest to researches due to diverse applications in the medical sector. This study focuses on design and implementation of a mechanical device, a novel dual axis construct simulator (DACS) for in vitro studies on immortalised chondrocytes. DACS will …
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Knowledge-based approaches to fault diagnosis. The development, implementation, evaluation and comparison of knowledge-based systems, incorporating deep and shallow knowledge, to aid in the diagnosis of faults in complex hydro-mechanical devices.
… to aid in the diagnosis of faults in physical devices has grown considerably since their introduction during the 1970s. The majority of the early knowledge-based systems incorporated shallow knowledge, which sought to define simple cause and effect relationships between a symptom and a fault, …
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Design of a rodent dynamometer
… isotonic testing on both male and female rats. A mechanical device was designed to position the rats for testing as well as provide a platform for the motor and other system components. All of the system components were connected electrically through a National Instruments UMI-7764 breakout box, …
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Dynamic Obstacle Avoidance on a Self-balancing Robot Platform
… that provide safety guarantees when a mechanical device is teleoperated by a human user. These algorithms can intervene when an unsafe choice is made to protect the operator and the system itself. The challenge that this work specifically focuses upon is dynamic obstacle avoidance by a …
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Design, fabrication, and characterization of a lithium niobate optomechanical photodetector based on released whispering-gallery-mode microdisk resonators
… for Radio Frequency (RF) micro-opto-electro-mechanical systems (MOEMS) and devices, electro-optical modulators and tunable filters, and other high-speed and low-loss photonic devices. In this work, an opto-electro-mechanical device for detecting light power is developed on a Lithium Niobate …
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Capturing skin properties from dynamic mechanical analyses
Existing skin mechanical testing devices focus on measuring skin elasticity and are not tailored to assess the dynamic behavior of skin. The mathematical techniques used to analyze data collected using these devices are often not optimal. A new dynamic mechanical device that measures the linear …
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Biocompatibility of an implantable ophthalmic drug delivery device
… this method, several implantable, timed release devices have been investigated to deliver these drugs directly to affected areas. Draper Laboratory and Massachusetts Eye and Ear Infirmary have proposed an implantable, fully programmable, mechanical device for long-term drug delivery to the eye …
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Characterization of macro-length conducting polymers and the development of a conducting polymer rotary motor
… electroactive polymer class that exhibit active mechanical deformations. These deformations induce stresses and strains that allow for conducting polymers to be used as an actuator for mechanical devices. Incorporation of conducting polymer actuators into mechanical devices requires …
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The act and activities of invention: an autobiographical phenomenological case study of a visualizing inventor
… invention produced during this research was a mechanical device comprised of approximately seventy parts. Documentation of the product was through a formal Application for a U.S. Patent, filed pro se, and accompanied by nine pages of formal drawings also generated by the Researcher/Subject. The …
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Voltage Regulation for Distribution Networks with Smart Photovoltaic Inverters
Traditional mechanical device-based voltage regulation becomes less effective when the high penetration of photovoltaic (PV) generation introduces rapid and frequent voltage fluctuations to the distribution networks. The PV inverters which are able to provide fast and flexible reactive power …
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Novel design for foot pressure measurement using opto-electronics in rehabilitation
… locomotor system better. For this project, a mechanical arrangement has been designed for substantiating the concept of the project. An optoelectronic circuit consisting of an infra-red emitting diode and a photo-detector is placed inside the mechanical device. The emitter diode emits 940 nm …
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LUCAS - Lund University Cardiopulmonary Assist System
… Cardiopulmonary Assist System (LUCAS) is a mechanical device providing automatic 5 cm deep chest compressions and active decompressions back to normal anatomical position with a frequency of 100 per minute, and a duty cycle of 50%, i.e., LUCAS is constructed to give chest compressions …
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Design and analysis of a hybrid locomotion system for mobile robot
Mobile robots are defined as autonomous mechanical device, which performs automated tasks either by predefined program or under human guidance by using remote control devices. The use of mobile robots is limited due to the lack of an effective locomotion system. There are few kinds of locomotion …
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Comparison of various media in teaching engineering principles : design of a D.C. motor torque/speed curve display mechanism
… comparison between the physical intimacy with a mechanical system and a computer simulation of the same system - specifically DC motors and their torque/speed characteristics. I built a fully mechanical dynamometer that draws the torque/speed curve of a DC motor as a student grabs the motor …
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Investigating the Effects of Sparger Design in Column Photobioreactors
… for all the mixing effects as no additional mechanical device is used to facilitate the mixing. Sufficient mixing helps distribute radiation evenly to all the cells, and also allows the cells to get the various nutrients they need. Mixing improves productivity by increasing the frequency of …
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Development of ultra-stable MEMS oscillators with 10⁻¹¹-level frequency stability via dual-mode temperature compensation
… resonator, which provides a stable, aging-free mechanical platform by isolating the device from environmental perturbations. Building on this platform, we evaluate how temperature variations and electronics-induced phase drift fundamentally limit the achievable stability of MEMS-based clocks. …
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Synthesis of electrical and mechanical networks of restricted complexity
… the synthesis of linear passive electrical and mechanical networks. The main objective is to gain a better understanding of minimal realisations within the simplest non-trivial class of networks of restricted complexity--the networks of the so-called "Ladenheim catalogue"--and thence establish …
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