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 89 for “"Detection efficiency"”.
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Measurement of the fast neutron detection efficiency for a NaI(T1) scintillator
Includes bibliographical references (pages 35-36).
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A study of the detection efficiency of the LIGO interferometers to transient sources
… Finally, they enable us to quantify the efficiency of our detectors depending on the strength and morphology of the signal. The stationarity of this parameter is also studied to ensure the variation of the sensibility is limited. Using theoretical estimations of the amplitude of the …
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A root cause analysis of REXIS detection efficiency loss during phase E operations
… operations, the instrument experienced detector efficiency loss in the form of loss of iron calibration source counts, which greatly affected the science output. In this thesis, a root cause investigation is performed on the loss of iron counts, and an optical light leak onto the edge of the …
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A hybrid and cross-protocol architecture with semantics and syntax awareness to improve intrusion detection efficiency in Voice over IP environments
… factors with better techniques in Intrusion Detection are therefore needed. This thesis describes the design and implementation of a host-based Intrusion Detection System (IDS) that targets VoIP environments. Our intrusion detection system combines two types of modules for better detection …
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Investigation of non-normal incidence charged-particle response of CR39 nuclear track detectors, with applications in nuclear diagnostics for inertial confinement fusion
… Ion Accelerator (LEIA) to measure CR39's detection efficiency for protons at non-normal incidence to CR39 detectors. We specifically study protons resulting from D-D fusion reactions with incident angles up to 50 degrees. Understanding the CR39 response to charged particles at an angle is …
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Coupling light to superconductive photon counters
… to fabricate SNSPDs, and has demonstrated device-detection-efficiency above 50% at near infrared wavelengths. However, one remaining challenge must be taken - efficiently coupling light into the detector. This step is difficult because of the small active area of the SNSPD and its low temperature …
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Unsupervised Concept Drift Detection in Data Streams
… of collecting true class labels. Traditional detection methods usually need high computation and memory cost and is unable to distinguish between concept drift and novelty. To improve the drift detection efficiency, we propose four unsupervised concept drift detection methods. Especially, we …
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Gamma ray astronomy in the low energy range
… are reviewed. Detailed calculations of the detection efficiency of a Double Compton telescope are presented and these results led to the development of the MISO low energy gamma ray telescope.<br/><br/>Preliminary calculations of the detection efficiency of an Anticollimated Double Compton …
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Simulation of muon-catalysed fusion experiments
… simulations provide estimates of geometrical and detection efficiency factors required for the calculation of the sticking coefficient from the experimental measurements. Simulations have been made of alternative experimental geometries in order to investigate the α-neutron coincidence signature …
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Scanning near-field photon emission microscopy
… the integrated circuit (IC). Near-field optical detection using scanning near-field photon emission microscopy (SNPEM) promises resolution capabilities below 100 nm. However, existing implementations of SNPEM have serious limitations in terms of photon emission detection efficiency, repeatability …
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A Microcomputer Simulation to Evaluate Management Strategies For Rearing Dairy Replacements
… costs associated with changing feed costs, heat detection efficiency, death loss, and abortion rate. For the growth analysis, six scenarios were evaluated: 1) normal growth from 5 wk to calving, 2) Accelerated growth from 5 wk to calving, 3) slow growth from 5 wk to calving, 4) normal Growth from …
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A Semantic Complex Event Processing Framework for Internet of Things Applications. Towards Detecting Complex Events in Stream Processing
… proves to be a powerful solution for event detection. The framework demonstrates enhanced accuracy, real-time analysis capabilities, and the ability to handle heterogeneous data sources. The proposed traditional CEP with semantic web technologies framework is thoroughly evaluated and …
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Neutron Measurements and Reactor Antineutrino Search with the SNO+ Detector in the Water Phase
… cross-section $\sigma_{H,t}$, and the neutron detection efficiency $E_{\textrm{center}}$ at the center of the detector: \begin{equation} \begin{aligned} &\tau = 202.35 \pm 0.42\ (stat.)\ ^{+0.38}_{-0.31}\ (syst.)~\mu\textrm{s}, \\ &\sigma_{H,t} = 336.3 ^{+1.2}_{-1.5}~\textrm{mb}, \\ …
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Development of detectors for the monitoring of mixed radiation fields
… radiation hardness, geometric flexibility, and detection efficiency are increasingly demanding. This work presents two complementary developments addressing these challenges through advanced materials and detector design. First, an innovative thermal neutron detection and imaging device based on …
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Development of a new silicon pixel detector with 10 ps time resolution for high luminosity future experiments
… done are the time resolution and the detection efficiency before and after the irradiation up to 2.5·10^16 1 MeV n_eq/cm^2.
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Superconducting nanowire single-photon detectors on aluminum nitride photonic integrated circuits
… substrate material have demonstrated saturated detection efficiency from visible to near-IR, sub-60-ps timing jitter, and ~6 ns reset time. This work will contribute towards building a fully integrated quantum photonic processor.
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Optimization of plastic scintillator thicknesses for online beta detection in mixed fields
For efficient beta detection in a mixed beta gamma field, Monte Carlo simulation models have been built to optimize the thickness of a plastic scintillator, used in whole body monitor. The simulation has been performed using MCNP/X code and different thicknesses of plastic scintillators ranging …
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Amorphous hydrogenated boron carbide for solid-state direct-conversion thermal neutron detection
… three decades for solid-state thermal neutron detection due to its high resistivity, moderate bandgap, high neutron absorption cross-section, and high stability under harsh physical and chemical environment. However, its success has been hindered by its poor and/or not well understood charge …
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Fabrication of superconducting nanowire single proton detectors
… and performance. Our best device has a detection efficiency of [approx.] 10 % at 1064 nm photon wavelength at 2.1 K and a photon-induced voltage-pulse duration of [approx.] 3 ns.
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Generation of fiber-coupled, nondegenerate, polarization-entangled photons for quantum communication
… photon bandwidth with an idler conditional detection efficiency of 1.6%. This work is a significant first step toward realizing a high-flux source of nondegenerate polarization-entangled photons.
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