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 94 for “"a-delta"”.
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High voltage sampling scheme independent of capacitor voltage coefficient for a delta sigma modulator
… paper presents a unique sampling scheme for a delta sigma modulator that is independent of common mode voltage. The rejection of common mode voltage is important in the application of electric vehicles and other large battery packs in order to accurately measure every cell on the stack with …
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A Phosphoinositide-Specific Phospholipase C of Trypanosoma Cruzi: Unique Characteristics of a Delta-Type Homologue
… characteristics similar to those of mammalian delta-type PI-PLCs. The TcPI-PLC gene is expressed at high levels in the epimastigote and amastigote stages of the parasite, and its expression is induced during the differentiation of trypomastigotes into amastigotes, where it associates to the …
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Design and control of a compact aerial manipulation system with a Delta-type parallel robot
… and control of a quadcopter equipped with a Delta-type parallel manipulator. Such systems present demanding challenges in both control theory and task planning, which are addressed with novel mechanical features, modern flight controllers, and optimal trajectory generation. They are primarily …
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Storm-dominated shelf sedimentation marginal to a delta: an example from the Devonian of southwestern Virginia and eastern West Virginia
The Chemung Formation in the south-central Appalachians constitutes part of the thick Devonian - lower Mississippian Acadian clastic wedge. Sediment in the Chemung was derived from a progressively-uplifted source area to the east and accumulated in the proximal environments of an epeiric sea. …
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A crack closure model for the fatigue behavior of notched components and welded joints
… effective stress-intensity ratio $U(a)$ (=$\Delta K\sb{\rm eff}(a)/\Delta K(a))$ does not exhibit the commonly observed ""dip"" caused by the notch plasticity. A finite element procedure was used to calculate the magnitude of the notch plastic stretches. It was found that the magnitude of …
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Polynomials of the Adjacency Matrix of a Graph (distance-Transitive, Distance-Regular, Orbit)
Given graphs (GAMMA) and (DELTA), and a real polynomial r(x), we will say that (DELTA) is generated from (GAMMA) by r(x) if r(A((GAMMA))) = A((DELTA)) where A((GAMMA)) and A((DELTA)) are adjacency matrices. For several interesting classes of graphs it is possible to determine all of the graphs …
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Operational characteristics and grating tuning of quantum well heterostructure lasers
… laser operation in the 8700-9700 A range ($\Delta\lambda\sim$ 1000 A, $\Delta$h$\nu\sim$ 150 meV) and pulsed tunable operation in the 8450-9750 A range ($\Delta\lambda\sim$ 1300 A, $\Delta$h$\nu\sim$ 200 meV) is demonstrated. The prospects for developing a high-power, broadly tunable, …
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New architecture for RF power amplifier linearization
… and adaptive digital predistortion using a [delta sigma] modulator for automatic inversion of power amplifier nonlinearity. Two-point architecture can be seen as a solution that extends the linearization bandwidth of the traditional feedback architecture while also offering decent digital …
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Delta operator : modelling forecasting and control
Interest in the delta operator as a tool in the development of robust approaches to modelling and control has been revived in the last decade, principally following the work of Goodwin (1985). The use of this discrete differential operator provides improved numerical properties particularly when …
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High-Speed, Low-Spurious CMOS Analog -to -Digital Converter
… folding ADCs. Background offset trimming with a delta-sigma modulator is applied to compensate the random input offset of folding amplifiers. A subranging front-end is used in conjunction with the pipelined folding ADC to make the calibration feasible. The second prototype chip was measured to …
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All The King's Horses: The Delta Wing Leading-Edge Vortex System Undergoing Vortex Breakdown: A Contribution to its characterization and Control under Dynamic Conditions
The quality of the flow over a 75 degree-sweep delta wing was documented for steady angles of attack and during dynamic maneuvers with and without the use of two control surfaces. The three-dimensional velocity field over a delta wing at a steady angle of attack of 38 degrees and Reynolds number of …
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A determination of the effective thickness of a liquid deuterium target for a quasielastic scattering experiment
… The scattered deuterons were detected with a Delta E - E (thin plastic scintillator - thick CsI calorimeter) telescope. The effective target thickness was determined to be larger than is thought physically possible. Possible reasons for the unphysical result are discussed, but further analysis …
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Molecular and Biochemical Analyses of a Three-Subunit Euryarchaeal Clamp Loader Complex
… and is made of three gamma subunits (motor), a delta' subunit (stator) and a delta subunit (wrench). Furthermore, our studies on this archaeal three-subunits clamp loader have provided important biochemical, molecular, and evolutionary insights into the function of RFC, an indispensable …
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Realistic impulsive P wave source in an infinite elastic medium
… goes to zero, and the total energy radiated by a delta function (or any derivative of the delta function) source being infinite. By noting that the character of the solution in the elastic region must match the acoustic case near the source, a realistic impulsive pressure source is postulated …
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Stratigraphy and deposition of the Price Formation coals in Montgomery and Pulaski Counties, Virginia
… were initially transported from a northern deltaic source. The Cloyd Conglomerate Member represents offshore barrier bars, while the Lower Price unit was deposited in a lagoon behind the bars. At the top of the Lower Price unit, the "marker bed" sandstone includes sedimentary features of …
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Delta-gap port model for surface-volume-surface electric field integral equation
This thesis presents a delta-gap source model for recently introduced Surface- Volume-Surface Electric Field Integral Equation (SVS-EFIE). The SVS-EFIE is a class of single-source integral equations (SSIEs), which is obtained from the combination of the volumetric equivalence principle with the …
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Unitary Space-Time Waveform Scheduling for High-Resolution Delay-Doppler MIMO Radar Sensing
… individual autocorrelation functions sum to a delta function. A unitary design for the illustrative 4x4 example prescribes the scheduling of the complementary sequence based waveforms over four transmit antennas over four PRIs. Further, it dictates how the matched filtering of the returns over …
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Back to Back Active Power Filter for Multi-Generator Power Architecture with Reduced dc-link Capacitor
… due to the simple structure, which consists of a delta-delta and a delta-wye phase-shift transformer pair and it effectively mitigates undesirable harmonics from the nonlinear load. In the early 2000s, a shunt type passive front-end for a shipboard power system was proposed. By shunting the two …
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Excluding a Weakly 4-connected Minor
… 4-connected graph obtained by performing a $\Delta Y$ transformation to the octahedron. This result can be used to show an interesting characterization of quasi 4-connected, outer-projective graphs.
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Empirically detecting colour: can we use solar cells as colour sensors?
… cell is not a feasible colour sensor due to high Delta E values. We then combined the colour matching functions of multiple solar cells. The Micromorph and DSSC combination had a lower Delta E average value in comparison to all single solar cells tested. At a light bandwidth of 60 nm, a Delta E …
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