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 156 for “"Cusp"”.
-
Bott periodicity for fibred cusp operators
In the framework of fibred cusp operators on a manifold X associated to a boundary fibration ... , the homotopy groups of the space ... of invertible smoothing perturbations of the identity are computed in terms of the K-theory of T*Y . It is shown that there is a periodicity, namely the odd and …
-
Cusp Ion Structures and Their Relation to Magnetopause Processes
… ion structures observed near the magnetosphere cusps have long been used to infer locations and properties of reconnection at the Earth's magnetopause. However, observations are often difficult to interpret since spacecraft move relative to a cusp ion structure, creating temporal/spatial …
-
Gravitational waves from a string cusp in Einstein-aether theory
… of gravitational radiation are emitted when a cusp forms on the string. The same phenomenon is then studied in an effective field theory with Lorentz violation called Einstein-aether theory. This is a simple theory with a dynamic preferred frame, but it retains rotational and diffeomorphism …
-
Statistical study of oxygen+ transport from the cusp to the plasmasheet
… have determined the occurrence frequency of the cusp-source O+ in the magnetotail to determine where and when it is observed. The results show that the probability to observe O+ along the transport path is high even during nonstorm times, although, as expected, the highest probability is found …
-
A Study of Reconnection Poleward of the Cusp: Cluster and Polar
… the high-latitude magnetopause poleward of the cusp under northward interplanetary magnetic field in the years 2001−2008. We identified 18 events that fulfilled the criteria that was used as plausible evidence for an IDR crossing. A wide range of guide fields (6 to 74%) and very high density …
-
A Three-Year Study of the Magnetic Field Fluctuations in the Magnetospheric Cusp
<p>The high-altitude magnetospheric cusps are regions of significant magnetic field turbulence. There are also magnetic field fluctuations that cannot be called turbulence. Some of the low frequency fluctuations observed in the cusp have been shown to be motion of the cusp structure by the …
-
Inspection & modelling of cusp geometry in additive manufacturing to predict product’s surface roughness
… Based on actual observations and modeling of the cusp geometry under various setups and fabrication conditions, an empirical model to express the surface roughness distribution is presented. The developed methodology presents mathematical expressions for the profile of cusps classified based on …
-
ON THE CUSP OF INVISIBILITY: THE LOWER RIO GRANDE VALLEY, MARGINALIZED STUDENTS, AND INSTITUTIONAL SPACES
… and student demographic that has remained on the cusp of invisibility in society, the academy, and the discipline of rhetoric and composition. The contribution of this research includes developing spatial and temporal awareness, increasing attention to local and regional cultural differences, and …
-
On the Cusp: A School District and Two Communities Respond to an Oil Pre-Boom
<p>This case study is an investigation of the attitudes, perceptions, and reactions of school staff and community members in a rural pre-boom school district. In the early stage of an oil boom, real and perceived disruptions commonly occur in the schools and communities that are affected. The …
-
Cosmic string cusps and their application to fast radio bursts
… The first is relativistic modification of cusps. Nambu-Goto strings generically develop cusps, regions of the string which emit coherent electromagnetic radiation when they decay. We point out that consideration of relativistic effects in the rest frame of the string cusp substantially …
-
Case Studies of IMF Driven Auroral Emissions
… entry into Earth's ionosphere at the polar cusp. At the cusp Earth's magnetic fields lines are open and connect .directly to the magnetic field lines of the solar wind. The energy from the solar wind particles precipitating into the ionosphere are dissipated as the aurora. The purpose of …
-
Energetic particles in the earth's magnetospheric cusps
The Earth's magnetic cusps are the regions with the most direct transfer of energy, mass, and momentum from the flowing solar wind to the Earth's magnetosphere. Spacecraft observations in the cusp have revealed a high energy component to the thermal particle distribution. This has raised the …
-
Paleomagnetism of Late Triassic and Jurassic sediments of the southwestern United States.
… Plateau, a sharp corner in the APW path (J1 cusp) is resolved near the pole from the Hettangian/Sinemurian (∼200 Ma) Moenave Formation (59.4°N; 59.2°E). The J1 cusp implies an abrupt change from counterclockwise rotation of Pangea prior to 200 Ma to clockwise rotation thereafter. …
-
The Asymptotic Behaviour of the Riemann Mapping Function at Analytic Cusps
… be differentiated: analytic corners and analytic cusps. The first part of the thesis deals with the asymptotic behaviour at analytic corners where the opening angle is greater than 0. The results of Lichtenstein and Warschawski on the asymptotic behaviour of the Riemann map and its derivatives at …
-
A Nonlinear Approach to Gender bias in Leadership Emergence Perceptions
… a nonlinear dynamic modeling technique, called cusp catastrophe theory. It was predicted that a nonlinear model would account for more variance than a linear model. Furthermore, it was also predicted that participants would be more resistant to recognizing a female as an emerging leader, as …
-
Enumerative algebraic geometry via techniques of symplectic topology and analysis of local obstructions
… are to enumeration of rational curves with a cusp of specified nature in projective spaces. A general approach for counting positive-genus curves with a fixed complex structure is also presented. The applications described include enumeration of rational curves with a (3,4)-cusp, genus-two and …
-
Accelerating graph computation with system optimizations and algorithmic design
… work. On the systems end, I present the CuSP system and the DeepGalois system: 1. CuSP, or Customizable Streaming Partitioner, is a fast and general distributed graph partitioner that generates partitions for distributed graph analytics systems to use. CuSP provides a solution to the …
-
You Should Look a Gifted Mammal in the Mouth: Using Dental Morphology to Understand the Evolution of Mammalian Dentition
… along with the genus. Second, I investigate if cusp shape covariation across the premolar-molar boundary can highlight dental morphology covariance patterns that may contribute to the evolution of molarization in mammals. I found a significant difference in the cusp shape modularity among the …
-
A conformable ultrasound patch for cavitation enhanced transdermal cosmeceutical delivery
… Here, we report a conformable ultrasound patch (cUSP) that enhances transdermal transport of niacinamide by inducing intermediate-frequency sonophoresis in the fluid coupling medium between the patch and the skin. The cUSP consists of piezoelectric transducers embedded in a soft elastomer to …
-
High-latitude electron density observations from the IMAGE radio plasma imager
… possible. Soundings of the terrestrial magnetic cusp provide the first remote observations of the dynamics and poleward density profile of this feature continuously over a 60-minute interval. During steady quiet-time solar wind and interplanetary magnetic field conditions, the cusp is shown to be …
Page 1 of 8