Improved 3D MR Image Acquisition and Processing in Congenital Heart Disease

Congenital heart disease (CHD) is the most common type of birth defect, affecting about 1% of the population. MRI is an essential tool in the assessment of CHD, including diagnosis, intervention planning and follow-up. Three-dimensional MRI can provide particularly rich visualization and information. However, it is often complicated by long scan times, cardiorespiratory motion, injection of contrast agents, and complex and time-consuming postprocessing. This thesis comprises four pieces of work that attempt to respond to some of these challenges. The first piece of work aims to enable fast acquisition of 3D time-resolved cardiac imaging during free breathing. Rapid imaging was achieved using an efficient spiral sequence and a sparse parallel imaging reconstruction. The feasibility of this approach was demonstrated on a population of 10 patients with CHD, and areas of improvement were identified. The second piece of work is an integrated software tool designed to simplify and accelerate the development of machine learning (ML) applications in MRI research. It also exploits the strengths of recently developed ML libraries for efficient MR image reconstruction and processing. The third piece of work aims to reduce contrast dose in contrast-enhanced MR angiography (MRA). This would reduce risks and costs associated with contrast agents. A deep learning-based contrast enhancement technique was developed and shown to improve image quality in real low-dose MRA in a population of 40 children and adults with CHD. The fourth and final piece of work aims to simplify the creation of computational models for hemodynamic assessment of the great arteries. A deep learning technique for 3D segmentation of the aorta and the pulmonary arteries was developed and shown to enable accurate calculation of clinically relevant biomarkers in a population of 10 patients with CHD

Simulating cosmic structure formation with the GADGET-4 code

Numerical methods have become a powerful tool for research in astrophysics, but their utility depends critically on the availability of suitable simulation codes. This calls for continuous efforts in code development, which is necessitated also by the rapidly evolving technology underlying today's computing hardware. Here we discuss recent methodological progress in the GADGET code, which has been widely applied in cosmic structure formation over the past two decades. The new version offers improvements in force accuracy, in time-stepping, in adaptivity to a large dynamic range in timescales, in computational efficiency, and in parallel scalability through a special MPI/shared-memory parallelization and communication strategy, and a more-sophisticated domain decomposition algorithm. A manifestly momentum conserving fast multipole method (FMM) can be employed as an alternative to the one-sided TreePM gravity solver introduced in earlier versions. Two different flavours of smoothed particle hydrodynamics, a classic entropy-conserving formulation and a pressure-based approach, are supported for dealing with gaseous flows. The code is able to cope with very large problem sizes, thus allowing accurate predictions for cosmic structure formation in support of future precision tests of cosmology, and at the same time is well adapted to high dynamic range zoom-calculations with extreme variability of the particle number density in the simulated volume. The GADGET-4 code is publicly released to the community and contains infrastructure for on-the-fly group and substructure finding and tracking, as well as merger tree building, a simple model for radiative cooling and star formation, a high dynamic range power spectrum estimator, and an initial conditions generator based on second-order Lagrangian perturbation theory.Comment: 82 pages, 65 figures, accepted by MNRAS, for the code see https://wwwmpa.mpa-garching.mpg.de/gadget

Social work with airports passengers

Social work at the airport is in to offer to passengers social services. The main methodological position is that people are under stress, which characterized by a particular set of characteristics in appearance and behavior. In such circumstances passenger attracts in his actions some attention. Only person whom he trusts can help him with the documents or psychologically

LIPIcs, Volume 274, ESA 2023, Complete Volume

LIPIcs, Volume 274, ESA 2023, Complete Volum

32. Forum Bauinformatik 2021

Das Forum Bauinformatik ist eine jährlich stattfindende Tagung und ein wichtiger Bestandteil der Bauinformatik im deutschsprachigen Raum. Insbesondere Nachwuchswissenschaftlerinnen und -wissenschaftlern bietet es die Möglichkeit, ihre Forschungsarbeiten zu präsentieren, Problemstellungen fachspezifisch zu diskutieren und sich über den neuesten Stand der Forschung zu informieren. Es bietet sich ausgezeichnete Gelegenheit, in die wissenschaftliche Gemeinschaft im Bereich der Bauinformatik einzusteigen und Kontakte mit anderen Forschenden zu knüpfen

Energy: A continuing bibliography with indexes

This bibliography lists 1546 reports, articles, and other documents introduced into the NASA scientific and technical information system from April 1, 1981 through June 30, 1981

Animating Film Theory

Animating Film Theory provides an enriched understanding of the relationship between two of the most unwieldy and unstable organizing concepts in cinema and media studies: animation and film theory. For the most part, animation has been excluded from the purview of film theory. The contributors to this collection consider the reasons for this marginalization while also bringing attention to key historical contributions across a wide range of animation practices, geographic and linguistic terrains, and historical periods. They delve deep into questions of how animation might best be understood, as well as how it relates to concepts such as the still, the moving image, the frame, animism, and utopia. The contributors take on the kinds of theoretical questions that have remained underexplored because, as Karen Beckman argues, scholars of cinema and media studies have allowed themselves to be constrained by too narrow a sense of what cinema is. This collection reanimates and expands film studies by taking the concept of animation seriously. Contributors. Karen Beckman, Suzanne Buchan, Scott Bukatman, Alan Cholodenko, Yuriko Furuhata, Alexander R. Galloway, Oliver Gaycken, Bishnupriya Ghosh, Tom Gunning, Andrew R. Johnston, Hervé Joubert-Laurencin, Gertrud Koch, Thomas LaMarre, Christopher P. Lehman, Esther Leslie, John MacKay, Mihaela Mihailova, Marc Steinberg, Tess Takahash

Attention Restraint, Working Memory Capacity, and Mind Wandering: Do Emotional Valence or Intentionality Matter?

Attention restraint appears to mediate the relationship between working memory capacity (WMC) and mind wandering (Kane et al., 2016). Prior work has identifed two dimensions of mind wandering—emotional valence and intentionality. However, less is known about how WMC and attention restraint correlate with these dimensions. Te current study examined the relationship between WMC, attention restraint, and mind wandering by emotional valence and intentionality. A confrmatory factor analysis demonstrated that WMC and attention restraint were strongly correlated, but only attention restraint was related to overall mind wandering, consistent with prior fndings. However, when examining the emotional valence of mind wandering, attention restraint and WMC were related to negatively and positively valenced, but not neutral, mind wandering. Attention restraint was also related to intentional but not unintentional mind wandering. Tese results suggest that WMC and attention restraint predict some, but not all, types of mind wandering

Animating Film Theory

Animating Film Theory provides an enriched understanding of the relationship between two of the most unwieldy and unstable organizing concepts in cinema and media studies: animation and film theory. For the most part, animation has been excluded from the purview of film theory. The contributors to this collection consider the reasons for this marginalization while also bringing attention to key historical contributions across a wide range of animation practices, geographic and linguistic terrains, and historical periods. They delve deep into questions of how animation might best be understood, as well as how it relates to concepts such as the still, the moving image, the frame, animism, and utopia. The contributors take on the kinds of theoretical questions that have remained underexplored because, as Karen Beckman argues, scholars of cinema and media studies have allowed themselves to be constrained by too narrow a sense of what cinema is. This collection reanimates and expands film studies by taking the concept of animation seriously. Contributors. Karen Beckman, Suzanne Buchan, Scott Bukatman, Alan Cholodenko, Yuriko Furuhata, Alexander R. Galloway, Oliver Gaycken, Bishnupriya Ghosh, Tom Gunning, Andrew R. Johnston, Hervé Joubert-Laurencin, Gertrud Koch, Thomas LaMarre, Christopher P. Lehman, Esther Leslie, John MacKay, Mihaela Mihailova, Marc Steinberg, Tess Takahash