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 21 for “"Intrinsic Noise."”.
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Monte Carlo simulation for high-frequency intrinsic noise analysis of MOSFET
… thesis introduces a Monte Carlo simulation of intrinsic electronic noise in MOSFETs. Brief reviews of the important aspects of carrier transport, band structure, and Monte Carlo technique are discussed. Based on full band 2D Monte Carlo simulation, a noise analysis platform is utilized. To this …
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A Stochastic Framework to Model Extrinsic Noise in Gene Regulatory Networks
Stochastic modeling to represent intrinsic and extrinsic noise is an important challenge in molecular systems biology. There are numerous ways to model intrinsic noise. One framework for intrinsic noise in gene regulatory networks was recently proposed within the discrete setting. In contrast, …
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GHz Gravitational Wave and THz Dark Matter Detectors: Analysis and Simulation
… a magnetic field. A physical analysis highlights intrinsic noise and other complications. Dark matter (DM) axions can similarly be detected through the inverse Primakoff effect. Although not directly detected yet, axions are anticipated to produce stronger coherent signals and would additionally …
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Low phase noise, high bandwidth frequency synthesis techniques
A quantization noise reduction technique is proposed that allows fractional-N frequency synthesizers to achieve high closed loop bandwidth and low output phase noise simultaneously. Quantization induced phase noise is the bottleneck in state-of-the-art synthesizer design, and results in a …
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Gallium Nitride-Based HEMT Devices Modeling and Performance Characterization
… applications due to its high power and low noise characteristics at such frequencies. As a result of improved material growth and processing technologies, microwave power densities have been demonstrated in AlGaN/GaN HEMTs that are five to ten times greater than that of corresponding …
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Signal and noise propagation in genetic circuits
… between genes in living organisms are intrinsically stochastic. This not only gives rise to phenotypic variation in clonal populations of cells, but also fundamentally limits signaling fidelity and cellular memory. Accurately predicting noise propagation in gene networks is thus crucial …
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Noise and multistability in gene regulatory networks
… by large concentration fluctuations. This intrinsic noise has the potential to corrupt memory storage and might result in random transitions between different gene expression states. In the first part of my thesis, I will discuss how the fluctuations in gene expression levels are regulated. …
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Bayesian error bars for regression
… to the error bars. The first arises from the intrinsic noise on the target data, while the second comes from the uncertainty in the values of the model parameters which manifests itself in the finite width of the posterior distribution over the space of these parameters. The Hessian matrix …
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Stochastic dynamics in olfactory signal transduction and development
… is fully deterministic, here the model system is intrinsically noisy. The influence of the feedback on the intrinsic noise as well as on the signalling properties of the module are analysed in detail by computing mean values, correlation and response functions of the two dynamical system variables …
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MITO: ROBUST INFERENCE OF MITOCHONDRIAL PHYLOGENIES AND CLONES
… genotyping methods are needed to handle the intrinsic noise of single-cell measurement, especially in high-clonal-complexity scenarios. Moreover, we show that MT-SNVs-based-phylogenies (MT-phylogenies) exhibit remarkable robustness to noise, even though the constrained number of available …
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Quantum optical state comparison amplification
… and a characteristic feature of them is their intrinsic noise. This results in uncertainty relations restricting our ability to measure conjugate variables with absolute precision simultaneously. In the context of amplification, this noise forbids an unknown quantum signal to be amplified …
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Modeling of gene regulatory networks controlling cell-fate decisions in Bacillus subtilis
… fluctuations in the cellular growth rate and the intrinsic noise in the SinI-SinR-SlrR regulatory network can explain the single-cell heterogeneity of biofilm matrix production; moreover, we showed that the cellular growth rate affects matrix production in a feed-forward manner. Our model …
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High throughput microfluidic technologies for cell separation and single-cell analysis
… and numerical simulations, we investigate the intrinsic noise of low-abundance molecule detection. Experimental characterizations have also been performed to evaluate the impact of practical factors on actual readout variation.
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Sizing the X-ray spectral resolution limits of the REgolith X-ray Imaging Spectrometer (REXIS) instrument at Asteroid 1999RQ36
… of 1999 RQ36 is limited by properties that are intrinsic to the CCD detector, CCID-41, that has been chosen for REXIS. This thesis study outlines student experimentation and results that were conducted on the CCID-41 detector to gauge the intrinsic detector noise as a function of detector …
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Bounds and Low-Rank Approximation for Controlled Markov Processes
… remains challenging in practice due to their intrinsically uncertain nature, complicating the computation and interpretation of model predictions. This thesis addresses two distinct challenges for the study of Markovian processes and associated control problems: certification and scale. In the …
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Optimising Recording & Stimulation Performance of Neuronal Microelectrode Arrays through Macroporous Conducting Polymer Modification
… recording, through reduced impedance and thermal noise and (ii) stimulation, through increased cathodic charge storage capacity (CSCc) and charge injection limits (CIL). Alongside microelectrode modification, we hypothesise that the refinement of recording instrumentation (amplifier and digitiser) …
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A measurement system for and the measurement system of single particle energies in quantum dots
… respect to referencing potentials, shielding, intrinsic noise of the electronic components used and vibration isolation in order that the measurement system imposed the minimum induced electron heating on the device under test. Measurements were performed on quantum dot devices in the Coulomb …
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Engineering Low Noise Organic Electrochemical Transistors for Electrophysiology Applications
… and have been shown to provide higher signal-to-noise ratio (SNR) than electrodes. Their unique properties can pave the way for enhanced performance neural interfaces whilst minimising the invasiveness of the recording method. In this study, a thorough analysis of the noise characteristics of …
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Magnetoelectric Device and the Measurement Unit
… For the former one, both internal and external noise contribution must be considered, as one of them will limit practical applications. With regards to the internal noise sources, I have developed two design optimization methods, designated as ”'scale effect” and “ME array”. I showed that they …
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Neural diversity in multi-agent learning
… they just promote it via additional losses or intrinsic rewards, without a principled method to measure or control it. In doing so, they effectively change the learning objective of the original task, compromising its optimality. The aim of this thesis is to crystallise the role of neural (i.e. …
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