Search Results - "Markiewicz, P."

Survey of the flight efficiency of a long-haul aircraft under uncertainty of tasks by Markiewicz, P.

“…The article considers the problem of optimizing a long-haul aircraft flight under uncertainty of objectives and tasks. Based on the analysis of the well-known…”
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Inattentive Search for Currency Fundamentals by Markiewicz, Agnieszka P., Verhoeks, Ralph C., Verschoor, Willem F. C., Zwinkels, Remco C. J.

“…We test the rational inattention theory of exchange rates and proxy attention for different economic fundamentals by the search volume of related search…”
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Assessment of bootstrap resampling performance for PET data by Markiewicz, P J, Reader, A J, Matthews, J C

“…Bootstrap resampling has been successfully used for estimation of statistical uncertainty of parameters such as tissue metabolism, blood flow or displacement…”
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Rapid processing of PET list-mode data for efficient uncertainty estimation and data analysis by Markiewicz, P J, Thielemans, K, Schott, J M, Atkinson, D, Arridge, S R, Hutton, B F, Ourselin, S

“…In this technical note we propose a rapid and scalable software solution for the processing of PET list-mode data, which allows the efficient integration of…”
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Robustness of multivariate image analysis assessed by resampling techniques and applied to FDG-PET scans of patients with Alzheimer's disease by Markiewicz, P.J., Matthews, J.C., Declerck, J., Herholz, K.

“…For finite and noisy samples extraction of robust features or patterns which are representative of the population is a formidable task in which…”
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The amyloid imaging for the prevention of Alzheimer's disease consortium: A European collaboration with global impact by Collij, Lyduine E, Farrar, Gill, Valléz García, David, Bader, Ilona, Shekari, Mahnaz, Lorenzini, Luigi, Pemberton, Hugh, Altomare, Daniele, Pla, Sandra, Loor, Mery, Markiewicz, Pawel, Yaqub, Maqsood, Buckley, Christopher, Frisoni, Giovanni B, Nordberg, Agneta, Payoux, Pierre, Stephens, Andrew, Gismondi, Rossella, Visser, Pieter Jelle, Ford, Lisa, Schmidt, Mark, Birck, Cindy, Georges, Jean, Mett, Anja, Walker, Zuzana, Boada, Mercé, Drzezga, Alexander, Vandenberghe, Rik, Hanseeuw, Bernard, Jessen, Frank, Schöll, Michael, Ritchie, Craig, Lopes Alves, Isadora, Gispert, Juan Domingo, Barkhof, Frederik

“…Amyloid-β (Aβ) accumulation is considered the earliest pathological change in Alzheimer's disease (AD). The Amyloid Imaging to Prevent Alzheimer's Disease…”
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Verification of predicted robustness and accuracy of multivariate analysis by Markiewicz, P.J., Matthews, J.C., Declerck, J., Herholz, K.

“…The assessment of accuracy and robustness of multivariate analysis of FDG-PET brain images as presented in [Markiewicz, P.J., Matthews, J.C., Declerck, J.,…”
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A custom-built PET phantom design for quantitative imaging of printed distributions by Markiewicz, P J, Angelis, G I, Kotasidis, F, Green, M, Lionheart, W R, Reader, A J, Matthews, J C

“…This note presents a practical approach to a custom-made design of PET phantoms enabling the use of digital radioactive distributions with high quantitative…”
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Acceleration of image-based resolution modelling reconstruction using an expectation maximization nested algorithm by Angelis, G I, Reader, A J, Markiewicz, P J, Kotasidis, F A, Lionheart, W R, Matthews, J C

“…Recent studies have demonstrated the benefits of a resolution model within iterative reconstruction algorithms in an attempt to account for effects that…”
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Robustness of correlations between PCA of FDG-PET scans and biological variables in healthy and demented subjects by Markiewicz, P.J., Matthews, J.C., Declerck, J., Herholz, K.

“…In neuroimaging it is helpful and useful to obtain robust and accurate estimates of relationships between the image derived data and separately derived…”
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CSF total and phosphorylated tau protein, regional glucose metabolism and dementia severity in Alzheimer's disease by Haense, C., Buerger, K., Kalbe, E., Drzezga, A., Teipel, S. J., Markiewicz, P., Herholz, K., Heiss, W. D., Hampel, H.

“…Background and purpose:  We investigated associations between severity of cognitive impairment, cerebrospinal fluid (CSF) concentrations of total‐tau (t‐tau)…”
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High accuracy multiple scatter modelling for 3D whole body PET by Markiewicz, P J, Tamal, M, Julyan, P J, Hastings, D L, Reader, A J

“…A new technique for modelling multiple-order Compton scatter which uses the absolute probabilities relating the image space to the projection space in 3D whole…”
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Single-molecule microscopy reveals new insights into nucleotide selection by DNA polymerase I by Markiewicz, Radoslaw P, Vrtis, Kyle B, Rueda, David, Romano, Louis J

“…The mechanism by which DNA polymerases achieve their extraordinary accuracy has been intensely studied because of the linkage between this process and…”
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Nucleotide selection by the Y-family DNA polymerase Dpo4 involves template translocation and misalignment by Brenlla, Alfonso, Markiewicz, Radoslaw P, Rueda, David, Romano, Louis J

“…Y-family DNA polymerases play a crucial role in translesion DNA synthesis. Here, we have characterized the binding kinetics and conformational dynamics of the…”
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Genetic studies of the lac repressor. XIV. Analysis of 4000 altered Escherichia coli lac repressors reveals essential and non-essential residues, as well as "spacers" which do not require a specific sequence by Markiewicz, P, Kleina, L G, Cruz, C, Ehret, S, Miller, J H

“…Amber mutations have been constructed at 328 positions, corresponding to residues 2 to 329 in the E. coli lac repressor protein. Synthetic and naturally…”
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Performance assessment of motion correction for different distributions and count levels by Markiewicz, P. S., Matthews, S. C., Reader, A. S.

“…Motion correction methods are used to compensate for subject motion during a positron emission tomography (PET) scan, reducing the degradation in image quality…”
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Carcinogenic adducts induce distinct DNA polymerase binding orientations by Vrtis, Kyle B, Markiewicz, Radoslaw P, Romano, Louis J, Rueda, David

“…DNA polymerases must accurately replicate DNA to maintain genome integrity. Carcinogenic adducts, such as 2-aminofluorene (AF) and N-acetyl-2-aminofluorene…”
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Noise Properties of Four Strategies for Incorporation of Scatter and Attenuation Information in PET Reconstruction Using the EM-ML Algorithm by Tamal, M., Reader, A.J., Markiewicz, P.J., Julyan, P.J., Hastings, D.L.

“…Conventional methods for dealing with attenuation and scatter in PET can limit the reconstructed image quality, particularly if the attenuating medium is large…”
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A liquid electrolyte alkaline direct 2-propanol fuel cell by Markiewicz, Matthew E.P., Bergens, Steven H.

“…Prototype alkaline direct 2-propanol fuel cells (AD2PFCs) using commercial Pt/C electrodes and hardware, and a liquid electrolyte, were constructed and…”
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NiftyPET: Fast Quantitative Image Reconstruction for a New Brain PET Camera CareMiBrain by Morera-Ballester, C., Jimenez-Serrano, S., Beschwitz, S., Schmidt, F., Markiewicz, P. J.

“…Fast and quantitative image reconstruction for a new dedicated brain PET camera, CareMiBrain, is presented using the open-source Python package NiftyPET. The…”
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