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 45 for “"fundamental limit"”.
-
Fundamental limit of network flow attacks
… user capacity. In this thesis, we explore the fundamental limits of network flow attacks by investigating its feasibility region defined by the minimum resource required for a successful attack and designing optimal attacking strategies that achieve the feasibility region. First, we consider …
-
Resonant Spatial Light Modulation: Optical Programming and Sensing at the Fundamental Limit
… with a >MHz modulation bandwidth per diffraction-limited mode. Simultaneously operating wavelength-scale modes near the space- and time-bandwidth limits, this work approaches the fundamental limits of multimode optical control. In developing this technology, we also analyze the fundamental limits …
-
Fundamental limits of random access in wireless networks
… guarantees. In this thesis, we identify a fundamental limit on the aggressiveness of nodes, beyond which instability is bound to occur in a broad class of networks. We will mainly consider adapting transmission lengths by considering a weight for each node as a function of its queue size. …
-
Strategies for High-Performance Solid-State Photon Upconversion
… optical absorption, internal losses, and the fundamental limit from the upconverting process—triplet-triplet annihilation (TTA)—itself. In this thesis, we investigate strategies to tackle the limitations in solid-state photon upconversion. First, optical absorption is enhanced via embedding an …
-
Fundamental Limits on Antenna Size for Frequency and Time Domain Applications
… However, antenna size and performance are limited by radiation physics, not technology. In order to understand antenna radiation and energy storage mechanisms, classical and alternative viewpoints of radiation are discussed. Unlike the common sense of classical antenna radiation, it is …
-
On the 1/f noise of atomic-layer-deposition metal films
… to make detectors of bolometers. 1/f noise is a fundamental limit to the resolution. The experiments are designed to characterize the 1/f noise of the ALD fabricated Pt films. The measurement results show that for 7nm and 13nm ALD fabricated Pt films, 1/f noise is about two orders of magnitude …
-
Investigation of resonators loaded periodic structures
… a negative permeability. Therefore under the fundamental limit of effective medium theory that the dimensions of the lattice are much smaller than the wavelength, we can treat the array of SRRs as bulk material and retrieve its effective parameters.
-
Micro optics for micro hybrid concentrator photovoltaics
… the development of CPV technologies due to the fundamental limit of thermodynamics and practical difficulties of manufacturing and deployment, such as system bulkiness, tight tracking error, thermal management and inability to collect diffuse irradiance. By dramatically scaling down the …
-
Physics of ultracold spin mixtures in low and stable magnetic field environment
… the one hand, magnetic field stability sets the fundamental limit for observing phenomena in coherently coupled superfluid mixtures. In our laboratory, a magnetic shield ensures field stability at the microGauss level, enabling the observation of the quantum phase transition in a ferromagetic …
-
Applied stochastic Eigen-analysis
… using heuristic arguments. This exposes a fundamental limit on the identifiability of low-level signals due to sample size constraints when using the sample eigenvalues alone. The analysis is extended to address a problem in sensor array processing, posed by Baggeroer and Cox, on the …
-
Enhancing the efficiency of organic LEDs through spin-orbit coupling of charge-transfer states
… Here, we present evidence that this is not a fundamental limit. Two OLED structures have been studied, each providing evidence that the efficiency of the OLED can be enhanced by the use of a heavy-metal material to mix spin in charge-transfer states. A structure with a heavy-metal mixing layer …
-
Fundamental limits of wideband localization
… waveforms, and therefore the SPEB serves as a fundamental limit of localization accuracy.
-
Synchronization In Advanced Optical Communications
… all-semiconductor mode-locked laser system. The limitations of semiconductor optical amplifier in high energy, ultrashort pulse amplification are reviewed. A method to overcome the fundamental limit of small stored energy inside semiconductor optical amplifier called "eXtreme Chirped Pulse …
-
Learning with classical and quantum information constraints
… establishes a general framework for proving the fundamental limit of information-constrained learning and designs sample-optimal algorithms under settings of practical interest. We consider various information constraints, including privacy and communication constraints on classical computers, …
-
Information theory meets big data: Theory, algorithms and applications to deep learning
… following topics: (1) theoretical study of the fundamental limit of information-theoretic quantity estimators, especially k-nearest neighbor estimators of differential entropy and mutual information; (2) designing novel algorithms of differential entropy and mutual information estimators for …
-
NV diamond project for nEDM
… spin states decay. These time constants set the fundamental limit of the sensitivity for measuring magnetic and electric fields.
-
Superlattice-source nanowire FET with steep Subthreshold characteristics
… subthreshold swing of a conventional MOSFET is a fundamental limit to the continuation of transistor power scaling. In order to further reduce transistor power consumption and transistor footprint, new subthreshold transport mechanisms other than thermionic emission over an energy barrier are …
-
Neural Networks For Phase Demodulation In Optical Interferometry
… with sensitivities that achieve the fundamental limit given by the Cramér-Rao bound (CRB). As an application, we consider a particular QPI technique known as wavelength shifting interferometry (WSI) which obtains the OPL by acquiring multiple interferograms at different, evenly spaced …
-
An adaptive multistage interference cancellation receiver for CDMA
… expressions are extended to derive asymptotic limits on the performance of interference cancellation as the number of cancellation stages approaches infinity, demonstrating a fundamental limit on the performance improvement that can be expected from any multistage interference cancellation …
-
A novel method for the production of microwires
… value at GHz frequencies approaching a fundamental limit in which electrical resistance is independent of frequency. This thesis focuses specifically on the first major problem: producing micron scale wires of considerable length. In order to accomplish this, I have developed a bottom-up …
Page 1 of 3