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 23 for “"Concentric Rings"”.
-
The separation of two different sized particles via droplet evaporation
… particles can naturally separate into concentric rings by size with one ring per particle size. The objective of this investigation was to determine factors that contribute to this separation process.
-
Inhibition of Proteus Swarming by the Metabolic Products of Serratia Marcescens
… away from a point of inoculation giving rise to concentric rings of growth on the agar surface (Fig. 1). On media that is exceptionally moist, the concentric rings may be absent and swarming may only appear as a thin film of growth over the entire surface. | The presence of swarming species of …
-
Hub and Axis
… The hub configuration of the building is in concentric rings around the atrium in both space and materials. As materials were brought into the building, they enhanced the strong axial configuration and emphasized the layers surrounding the central hub space of the atrium. There are two pairs …
-
Design and Simulation of a Planar Crossed-Dipole Global Navigation Satellite System (GNSS) Antenna in the L1 Frequency Band
… various configurations included the addition of concentric rings in various numbers and sizes with the inclusion of cavity banking. Roger’s dual copper clad RO3010¿¿ material was used as a substrate for the design. The simulated cavity backing consisted of a thin block of Styrofoam¿¿ and …
-
Using a gimbal to calibrate an inertial measurement unit
… IMU is developed. A gimbal consisting of three concentric rings, with rotary encoders measuring the rotation between rings is designed. The IMU is fixed to the inner ring of the gimbal and rotated in space. By sweeping appropriate orientations of the IMU at appropriate rates, filtered sensor …
-
Gravitational influences on magnetic field structure in accretion disks
… it leads to a periodic "crystal" structure of concentric rings of current. This structure is significantly affected by gravitational forces: we find a solution to the equations of motion that shows a composite structure within the disk. We discuss the general relativistic effects near the event …
-
The influence of second-order motion on the induction of vection
… of a basic vection signal (radially expanding concentric rings) with three different carriers. The stimulus patterns contained different amounts of FO and SO motion energy (ME). The results indicated that a SO motion signal can induce vection but the vection responses will have slower onsets …
-
Root-cause analysis and characterization of oxygen-related defects in silicon PV material : an approach from macro to nanoscale
… silicon, characterized by low-lifetime concentric rings. Temperature- and injection-dependent photoluminescence imaging is applied to investigate the defect's root-cause by studying its evolution under several high temperature process conditions and is found to be caused by oxide-related …
-
Dielectrometry measurements of moisture diffusion and temperature dynamics in oil impregnated paper insulated electric power cables
… sensor geometry has the electrodes forming rings around the cylinder that are periodic along the cylindrical axis. The material is modeled by concentric rings of homogeneous materials. The electric field solution consists of an infinite summation of Fourier series terms. In finding the field …
-
Phase-Field Model For Heterogeneous Biofilm-Solvent Interaction and 3-D Numerical Simulation by GPUs
… coli form regular geometric patterns like simple concentric rings and elaborate ordered form. The experimental evidence indicates that the pattern formation may be a consequence of a phase separation which is embedded in our model. By using a double well free energy density function and adding a …
-
Hybrid optical and acoustic trapping
… a large number of polydisperse particles into concentric rings whereupon the smaller particles can then be further manipulated using a single beam optical tweezer.<br/><br/>A rudimentary optical sorting system, which pushes particles in a flow laterally using an optical trap, has been combined …
-
Capacity improvements for a direct-sequence code division multiple access network
… is the sectorisation of a cell into toroidal rings. This is shown to provide an increased system capacity when the cell is split into these concentric rings and this is compared with cell clustering and other sectorisation schemes. Another technique for increasing the capacity is achieved by …
-
Finite Element Analysis of Industrial Circular Sawblade With Respect to Tensioning, Rotating, Cutting, and Expansion Slots
… deforming the sawbody with one or more concentric rings. Experts who determine the location, depth, and number of residual stress rings are called "saw doctor". This thesis quantifies the residual stresses induced by saw doctors. Developing and evaluating finite element models of an …
-
Cell Topology Change by the Physical Engagement of Neighboring Cytoskeletal Networks
… actin networks at cell-cell contacts, and concentric rings of Rho family GTPases during wound healing. Neighboring networks can cooperate, antagonize and interconvert through both physical and chemical mechanisms, but how these interactions modulate overall cell shape remains unclear. My …
-
Vortex Configurations Of Bosons In Rotating Optical Lattices
… lattices when these are commensurate, and concentric rings when they are not. Again we model the imaging of these structures by calculating time-of-flight column densities. As in the absence of the optical lattice, the vortices are much more easily observed in a time-of-flight image than …
-
Middle-Ear Imaging and Estimation of The Linear Elastic Properties of The Human Tympanic Membrane
… partitioning the TM into 4 quadrants and 4 concentric rings. The estimated Young’s modulus values were 2.2 MPa, 2.4 MPa and 2.0 MPa, which are similar to recent literature values using an alternative method. An improved fit between simulated and experimental data were obtained when spatial …
-
Sedimentology and diagenesis of Ediacaran phosphorites from South China
… of these syn-compactional concretions produced concentric rings on bedding planes caused by internally deformed laminae resulting in Aspidella pseudofossils. These results highlight the necessity for critical evaluation of the origin of discoidal structures observed in Ediacaran sedimentary …
-
Studies Toward the Development of a Microelectrode Array for Detection of Dopamine Through Redox Cycling
… produce different geometries (parallel bands and concentric rings) with feature size of 4 µm or 25 µm and inter-electrode spacing of 4 µm or 25 µm on a single substrate (microelectrode arrays). Comparison of the individual electrochemical response of different arrangements of individually …
-
Hybrid mode coupling for enhanced sensing and integrated photonics
… resonator-based sensor coupled to two gold concentric rings determined computationally. We report changes in the refractive index of the bulk medium and bio-monolayer at the corresponding sensitivities: 1340 nm/RIU and 105.3 fm/RIU for ∆nbiolayer = 0.2 with a volumetric size of 1.0x103 nm3. …
-
Observations of disks around the youngest protostars: Characterizing frequency, dust properties, and magnetic fields at the earliest times
… source IRS 63 with 7 AU resolution to search for rings and gaps in a young protostellar disk. We found a series of concentric rings and gaps in the disk, centered around the protostar. Gaps are usually attributed to planet-disk interactions, although other phenomena such as volatile snowlines, …
Page 1 of 2