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.
Results
Showing 1 to 20 of 20 for “"vgt"”.
-
Kinematic analysis and animation of a variable geometry truss robot
… known as the Variable Geometry Truss or VGT for short. Widely recognized as adaptive or collapsing structures for space and military applications, VGTs have not received due consideration as robotic manipulators. VGTs undoubtedly represent an important sector of future manipulator …
-
The solution of variable-geometry truss problems using new homotopy continuation methods
A VGT or Variable-Geometry Truss can be thought of as a statically determinate truss that has been modified to contain some number of variable length members. These extensible members allow the truss to vary its configuration in a controlled manner. VGTs are often symmetric. constructed of …
-
An Analysis of the Gaming Industry in Illinois
… legislation allowing Video Gaming Terminals (VGTs) outside of casinos. This legislation was passed in order to increase tax revenues from gambling in a market that had seen decreases in revenues and admissions over the past 8 years. Many mature gambling markets have also seen decreases in …
-
Fonologie van de Vlaamse Gebarentaal: distinctiviteit en iconiciteit
… en structuren in de Vlaamse Gebarentaal (VGT) en na te gaan wat daarbij de plaats van iconiciteit binnen (of buiten?) een fonologisch model kan zijn. De focus ligt op het manuele gedeelte van gebaren, d.w.z. de vier parameters handvorm, oriëntatie van de hand, articulatieplaats en beweging …
-
Mobility analysis of variable geometry trusses
… and rigidity. Variable geometry trusses (VGTs) are a special class of parallel trusses. Literature on VGTs has covered many interesting problems, yet there has been no conscious effort to formulate a definition for a VGT. The major emphasis of this thesis is developing a set of precise …
-
Kinematic Analysis of Tensegrity Structures
… can be used as variable geometry truss (VGT) mechanisms by actuating links to change their length. This paper will present a new method of position finding for tensegrity structures that can be used for actuation as VGT mechanisms. Tensegrity structures are difficult to understand and …
-
Design of a robotic manipulator using variable geometry trusses as joints
… The introduction of Variable Geometry Trusses (VGT’s) represents an opportunity to overcome this limitation. The lack of stiffness in many serial manipulators is primarily due to compliance at the joints. The disadvantage of the series connected device include limitations in lilting capacity and …
-
Mean-value modelling and robust control of the airpath of a turbocharged diesel engine.
… equipped with variable geometry turbocharger (VGT) and exhaust gas recirculation (EGR). Both the EGR and the VGT are driven by the exhaust gas and render the control problem inherently multivariable. In order to allow for model-based control design, a mean-value model of the airpath of the …
-
An economic analysis of the effects of VGTs in Illinois.
… the operation of Video Gambling Terminals (VGTs), commonly referred to as slot machines, in any liquor-pouring establishments in the state. I use a unique dataset that measures a university's access to gambling using distance to the nearest VGT combined with publicly available data on …
-
Design and construction of a double-octahedral variable geometry truss manipulator
… and construction of a variable geometry truss (VGT) of the double-octahedral (pyramid-pyramid) geometry. The truss is expected to be the focus of several experimental research projects. In this thesis, a kinematic model is formulated, and the forward and inverse kinematic problems are solved. …
-
Improved leaf area index estimation by considering both temporal and spatial variations
… 1km as well as 10-day SPOT-vegetation (SPOT-VGT) NDVI products from May to October, 2007 and 2008. The results show that NDVI is the most suitable VI for quantifying temporal variation of LAI. LAI estimation is much improved by considering both temporal and spatial variations. Based on the …
-
Have Video Gaming Revenues led to an Increase in Municipal Services in Illinois?
… Illinois to have five Video Gaming Terminals (VGT) within their business, similar to the slot machines previously only seen at state casinos. These terminals arrived under much scrutiny, as scholars and citizens alike were concerned with the social negatives attached to gambling facilities. …
-
A Phenological Comparison of NDVI Products within Contiguous United States
… derived from NOAA AVHRR, MODIS, and SPOT VGT sensors. NDVI products from different instruments vary in spatial resolution, temporal coverage and spectral range. As a result, multi-sensor NDVI products are rarely used in a single phenological study. In order to evaluate the difference and …
-
"I Have a Sense that Gay is Diluting Significantly." Gay Nostalgia in a Post-Gay World and the Intergenerational Transitions of Toronto's Church-Wellesley Village (1973-2023)
… and written narratives on Vintage Gay Toronto (VGT) Facebook website to map the changing social, political, cultural, and spatial environment of the neighbourhood and gay Toronto. This work presents their experiences before and after the area was reconceptualized from a ghetto of segregated and …
-
A planar comparison of actuators for vibration control of flexible structures
… class of actuators, variable geometry trusses (VGT's), has been recently introduced. These actuators are actually built into the structure, and they operate by varying their link lengths to apply forces to the structure or to change the shape of the structure itself. This study compared the …
-
Diluted Operation of a Heavy-Duty Natural Gas Engine - Aiming at Improved Effciency, Emission and Maximum Load
… ratio, Variable Geometry Turbocharger (VGT), high turbulence pistons, long route EGR system and model-based control.
-
2D PIV Study of Grid Turbulence
… $AT$. The $2\times 2$ velocity-gradient tensor $VGT$ that can be formed from $2D~PIV$ data was used in a novel manner by plotting the joint probability density function ($PDF$) of its trace $p$ and determinant $q$. Under the assumptions of \textit{locally} isotropic turbulence, the observed …
-
Positional control strategies for a modular, long-reach, truss-type manipulator
… manipulator. Variable Geometry Trusses (VGT’s) are used to construct a reconfigurable manipulator system in which all primary members are loaded in pure tension or compression. Each module of the manipulator system is either a static truss link or one of several possible VGT actuators. …
-
Shape design using intrinsic geometry
… of planar and spatial Variable Geometry Truss (VGT) manipulators for pre-specified position and orientation of the end-effectors. It is expected that the proposed methodology could be used for problems of shape optimization. The shape design of a three-dimensional curve is accomplished by …
-
Environmental Change Based on Earth Observation and Field Data -- A Local Study in the Sahel Zone of Mali and Senegal
… (MODIS) (250 m) and SPOT-Vegetation (VGT) (1 km) data identify a heterogeneous pattern of spatial variability and the presence of active land degradation at a local level, accounting for approximately 5-10% of each study areas. Reasons for land degradation are both climatic and …