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 429 for “"Adjustable"”.
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Optimal synthesis of planar adjustable mechanisms
Adjustable mechanisms provide degrees of flexibility while retaining desirable features of one degree of freedom close-loop mechanisms, such as simplicity, stability, and high speed capabilities. By adjusting linkage parameters, additional phases of motions can be achieved using the same hardware. …
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Zigbee based wireless adjustable speed drive system
This thesis proposes a remotely controlled motor drive system which is able to supply a regulated voltage for both DC and AC motors. The proposed system integrates two different technologies, each of which belongs to the field of wireless communications and semiconductor power electronics. The …
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Exploring adjustable autonomy in online tutoring systems
… intelligent educational environments with adjustable autonomy mechanisms, the students’ learning outcomes will be enhanced. This research was divided into seven phases and involved a large number of participants (1725 in total) to assess the need for adjustable autonomy mechanisms in online …
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Operator adjustable impedance in bilateral remote manipulation
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1989.
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Size adjustable separation of biologically active molecules
Separation of biologically active molecules (BAM's) is a problem for the pharmaceutical and biotechnology industries. Current technologies addressing this problem require too many techniques, toxic additives, and time to filter desired materials. As a result, a new technology is needed. The …
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Electrochemical Impedance Spectroscopy using adjustable nanometer-gap electrodes
Electrochemical Impedance Spectroscopy (EIS) is a simple yet powerful chemical analysis technique for measuring the electrical permittivity and conductivity of liquids and gases. Presently, the limiting factor for using EIS as a portable chemical detection technology is the lack of absolute …
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Adjustable Energy Saving Device for Transom Stern Hulls
The study presents a numerical investigation about the hydrodynamic characteristics of a transom mounted interceptor on the Oliver Hazard Perry class frigate (FFG-7), in order to assess the potential of propulsion power reduction in a wide range of speeds. This study is aimed to design a stern …
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Characterization and testing of a height adjustable kinematic coupling
A new height adjustable kinematic coupling has been designed for a next generation high precision ceramics grinding machine designed to have total loop stiffness of 60 N/[mu]m. A test apparatus and prototype of the new coupling design has been built as the subject of this thesis to test the …
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Design of an Adjustable Compression Glove for Hand Arthritis
… levels of compression that are instantaneous and adjustable. This work explores the design of a pneumatically-actuated adjustable compression glove. The prototype is defined through user needs and is validated through compression testing, successfully and repeatedly producing pressure levels …
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Eccentric Interchangeability of the Semi‑Adjustable Articulator: A Pilot Study
… method used in teaching institutions is the semi-adjustable articulator. Several of these instruments claim interchangeability without loss of clinical accuracy and studies have supported this claim. No studies to date have assessed the interchangeability of the articulators in any relation other …
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Medium voltage petrochemical drives : soft start and adjustable speed systems
… used to start several motors and to drive one at adjustable speed. Associated benefits in terms of availability, hazardous areas and switching surge overvoltages are outlined. A technology feasibility study illustrates that new VSI Cascaded H Bridge (CHB) technology and the application concept is …
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BURLAP: Bits of Useful Randomness enable Learning with Adjustable Privacy
Training accurate models over sensitive data that is distributed among multiple users is an important problem in Machine Learning (ML). Good solutions would open the door to the use of these powerful algorithms in high-impact domains such as healthcare, finance and policy. While cryptography-based …
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Large Force Range Mechanically Adjustable Dampers for Heavy Vehicle Applications
Semi-active dampers utilizing various working principles have been developed for a variety of vehicles. These semi-active dampers have been designed to resolve the ride and handling compromise associated with conventional passive dampers, and increase vehicle stability. This thesis briefly reviews …
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Repeatable and adjustable on-demand local anesthesia using externally-triggerable liposomes
Pain management would be greatly enhanced by a formulation that would provide local anesthesia at the time desired by patients, with the desired intensity and duration. Current treatment for many pain states - including localized pain - often involves systemic medications such as opioids that have …
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PROBING CELLULAR MECHANO-SENSITIVITY USING BIOMEMBRANE-MIMICKING CELL SUBSTRATES OF ADJUSTABLE STIFFNESS
… have been made using polymeric substrates of adjustable stiffness with immobilized linkers. While such substrates are well suited to examine cell adhesion and migration in an extracellular matrix environment, they are limited in their ability to replicate the rich dynamics found at cell-cell …
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A Microfluidic Device for Transfection of Mammalian Cells Using Adjustable Shear Stress
Microfluidic technology is a rapidly progressing tool in biomedical engineering. Microfluidic devices are appreciated for their simplicity and production efficiency potential. Our research focuses on developing a microfluidic device capable of transfecting cells by applying shear stress to cause …
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Probing cellular mechano-sensitivity using biomembrane-mimicking cell substrates of adjustable stiffness
… have been made using polymeric substrates of adjustable stiffness with immobilized linkers. While such substrates are well suited to examine cell adhesion and migration in an extracellular matrix environment, they are limited in their ability to replicate the rich dynamics found at cell-cell …
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Adjustable Frequency Bandgap for Seismic Vibration Isolation of MRE-Based Metamaterial Foundations
An earthquake is a non-preventable natural disaster that shakes the ground and vibrates the structure's foundation, eventually damaging the superstructure. These seismic waves are more frequent in some areas because of their geological variations. The seismic vibration caused by earthquakes can …
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Bismuth Oxyhalide Nanosheets with Adjustable Band Edge Potentials for Photocatalytic Ammonia Generation
… such as visible light absorption capability, adjustable band edge potentials, and abundant surface oxygen vacancies to activate nitrogen molecules. In the third chapter, we fabricated ultrathin BiOI nanosheets by a surfactant-assisted hydrothermal method. Unlike bulk BiOI, ultrathin nanosheets …
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