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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 81 for “"PMF"”.
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Enhancement of strain sensor sensitivity by combination of polarization maintaining fiber and single mode fiber in sagnac loop
… a combination of polarization maintaining fiber (PMF) and single mode fiber (SMF) in a Sagnac loop. Four cases are investigated in this work. The first, second, third and fourth cases involve 10 cm PMF, 20 cm PMF, 36 cm PMF + 4 cm SMF and 36 cm PMF + 14 cm SMF respectively as the strain element. …
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Lung Perfusion CT: Differentiation between Lung Cancer and Progressive Massive Fibrosis
… either middle or low perfusion at 19 of 20 PMF lesions. Washout map also showed weak or moderate washout pattern in PMF. The kappa values (>0.818) for interreader agreement reached statistical significance (p<0.01). High perfusion on Volume map was 1 case (5%) in PMF group and 23 cases (92%) …
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Ozone Precursor Sources and Box Modeling of Ozone in Mexico City Under Altered Emission Conditions
… task, a modified positive matrix factorization (PMF) with Fpeak rotation (0.3 for MC-PMF and 0.5 for IC-PMF) was utilized to identify VOC emission sources. Similar eight main sources were found, albeit with differing contributions from MC-PMF and IC-PMF. While vehicular emissions (29.28%) remain …
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Oxygen Sensing by the Aer and Tsr Receptors of Escherichia Coli
… unidentified mechanism. Proton motive force (PMF) and electron flow were proposed as possible sensory signals but, distinguishing between the two was not possible, previously, in live, motile cells. I differentiated PMF from electron flow by creating a series of ETS mutant strains that express …
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Bayesian and Positive Matrix Factorization approaches to pollution source apportionment
The use of Positive Matrix Factorization (PMF) in pollution source apportionment (PSA) is examined and illustrated. A study of its settings is conducted in order to optimize them in the context of PSA. The use of a priori information in PMF is examined, in the form of target factor profiles and …
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Analysis of Ambient VOCs Levels and Potential Sources in Windsor
… Balance (CMB), Positive Matrix Factorization (PMF), and Principal Component Analysis (PCA) were applied to investigate the major sources of Windsor ambient Volatile Organic Compounds (VOCs). The annual average total VOC concentrations declined from 2005 to 2006. Summer concentrations were …
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Carbon nanotubes and graphene in aqueous surfactant solutions : molecular simulations and theoretical modeling
… were determined using potential of mean force (PMF) calculations. I found that the cholate ions wrap around the SWCNT like a ring, and exhibit a small tendency to orient perpendicular to the cylindrical axis of the SWCNT, a unique feature that has not been observed for conventional linear …
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Predicting NBA games with matrix factorization
… I use probabilistic matrix factorization (PMF) to incorporate the fact that when two teams play each other, the scores will be different each time. Lastly, I incorporate supplementary information such as the date of the game by combining multiple PMF problems using Gaussian process priors. …
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Optimal lift and drag modulation hypersonic control options for high ballistic coefficient entry vehicles at Mars
… Minimizing the propellant mass fraction (PMF) for SRP would enable larger payload masses. Maximizing the terminal descent initiation (TDI) altitude is also an important parameter for parachute deployment systems. The ability of different control methods, lift-only, drag-only, and both …
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Extrathyroidal thyroid hormone activation in ring doves
… were studied in the postmitochondrial fraction (PMF) of liver homogenates from adult and developing ring doves (Streptopelia risoria). The 5’D assays were performed in the presence of abundant substrate, reverse triiodothyronine (rT3), cofactor (dithiothreitol) and trace amounts of I¹²⁵-rT3. 5’D …
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The Advancements on the Interface of Statistical Computing, Survival Analysis, and Degradation Analysis
… as a part of the probability mass function (pmf) of a Poisson multinomial distribution (PMD). However, efficient methods for computing the pmf of the PMD have yet to be developed. To bridge this gap, this dissertation introduces three distinct methods to calculate the pmf of the PMD under …
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Substrate targeting and recognition in the flagellar type III secretion pathway
… flagellum energised by the proton motive force (PMF) and facilitated by a cytoplasmic ATPase complex comprising FliH, FliI and FliJ, which are evolutionarily related to components of the F1 ATPase. Unfolded subunits transit the length of the channel to the flagellum tip where they fold into the …
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A família na concepção dos profissionais de saúde que atuam no Programa Médico de Família de Niterói-RJ
… uma pesquisa qualitativa, realizada no âmbito do PMF Niterói. O estudo contou com levantamento documental sobre o programa e realização de entrevistas com profissionais que atuam na equipe básica. A análise priorizou o perfil dos entrevistados; suas concepções sobre família; as ações profissionais …
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Polyurethane foam from oil palm fruit waste: synthesis and characterization of biopolyol and foam properties
… foams were prepared from 100 % of PM biopolyol (PMF), incorporation of liquefied PM biopolyol with renewable monomer (PMRF), epoxy (PMEF) and PM fiber filler (PMF1-9) in the presence of dibutyltine dilaurate as a catalyst with water as blowing agent, and silicon oil as a surfactant. The liquefied …
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A Diverse and Comprehensive Air Quality Modeling Analysis of Houston, Texas: How Will Changing Emissions, Industries, and Legislation Impact the Air and Human Health?
… that combines Positive Matrix Factorization (PMF) with Random Forest machine learning interpreted by SHapley Additive exPlanation (SHAP). VOC and NOx data from the urban Milby Park and industrial Lynchburg Ferry sites were analyzed for the O3 seasons of 2017-2021. This revealed that NOx …
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Probabilistic Modeling and Verification of Large Scale Systems
… a system state as a probability mass function (pmf); a pmf is succinct in representation and is informative enough to describe many useful aggregate behaviors of the system. We model the dynamics of the state transitions as a Discrete Time Markov Chain (DTMC) and develop an on-line model …
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Particle-In-cell simulations of nonlocal and nonlinear effects in inductively coupled plasmas
… surface impedance, and ponderomotive force (PMF). At low electron-neutral collision rates, these are shown to include the local collisionless regime, the anomalous skin effect regime, and the nonlinear regime.The local collisionless regime occurs at high driving frequencies and is …
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Molecular Simulation Study of Oil Hydrocarbons, Dispersants and Other Organics in Atmospheric Air/Water Interfaces
… energy results through potential of mean force (PMF) calculation show good agreement with experimental results of the 1-octanol/water partition coefficients for the four GLVs we studied (i.e. 2-methyl-3-buten-2-ol, methyl salicylate, cis-3-hexen-1-ol and cis-3-hexenylacetate). Furthermore, our …
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Silicosis among Cape gemstone workers : tigers' eye pneumoconiosis
… serious disease. Progressive massive fibrosis (PMF) was noted in 4 of the 6 cases, three of whom had progression of their disease after cessation of exposure. With the development of PMF the initial restrictive pulmonary function abnormalities were followed by steadily worsening airflow …
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Simulations of carbohydrate conformational dynamics and thermodynamics
… Two principal types of potential of mean force (PMF) caltulation are used: free energy calculations for ratations about dihedral angles and end-to-end distance free energy calculations for the extension and compression of oligosaccharide strands.
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