18,470 research outputs found
Quantifying Brain Morphology Using Diffusion Imaging
No full textThese novel techniques provide unique information about the electromagnetic and mechanical properties of tissues and introduce new frontiers of study into disease mechanisms.https://catalogue.library.auckland.ac.nz/permalink/f/t37c0t/uoa_alma5122997633000209
Measuring AC magnetic field distribution using MRI
No full textElectric currents Pre applied to body in numerous applications in medicine, such as Electrical Impedance Tomography (EIT), cardiac defibrillators, electrocautery and some treatment methods in physiotherapy. IT the magnetic field within a region is measured, the currents generating these fields can be calculated using the curl operator. In this study, magnetic fields generated by AC currents injected into a phantom is measured using MRI. A pulse sequence that is originally designed for mapping static magnetic field Is used. AC currents In the form of burst sine wave is applied sychronous with the pulse sequence, Results show that this method can be used in applications where the frequency of the currents is in the audio range and the amplitude is a few milliamperes or larger depending on SNR
Measurement of AC magnetic field distribution using magnetic resonance imaging
No full textElectric currents are applied to body in numerous applications in medicine such as electrical impedance tomography, cardiac defibrillation, electrocautery, and physiotherapy. If the magnetic field within a region is measured, the currents generating these fields can be calculated using the curl operator. In this study, magnetic fields generated within a phantom by currents passing through an external wire is measured using a magnetic resonance imaging (MRI) system, A pulse sequence that is originally designed for mapping static magnetic field inhomogeneity is adapted, AC current in the form of a burst sine wave is applied synchronously with the pulse sequence, The frequency of the applied current is in the audio range with an amplitude of 175-mA rms, It is shown that each voxel value of sequential images obtained by the proposed pulse sequence is modulated similar to a single-tone broadband frequency modulated (FM) waveform with the ac magnetic field strength determining the modulation index, An algorithm is developed to calculate the ac magnetic field intensity at each voxel using the frequency spectrum of the voxel signal, Experimental results show that the proposed algorithm can be used to calculate ac magnetic field distribution within a conducting sample that is placed in an MRI system
Is sea-basing a viable method of providing logistic support to the UK amphibious force?
No full textMaritime power has traditionally been a central part of the UK’s defence planning and is well
suited to supporting a wide range of military operations. The littoral area has always created
problems for naval planners as most landings historically have had to endure a tactical
separation of the naval and land components, and hence an artificial seam between the Navy
and the Marines. With the end of the Cold War, amphibious operations are going to be more
difficult to conduct than in the past, and amphibious forces are going to have to adopt
manoeuvre warfare capabilities in order to successfully complete their missions. It is very
likely that amphibious forces will have to conduct operations against a numerically superior
enemy, who is on his own terrain, and be surrounded by a neutral, if not hostile populace. As
such, the concept of Operational Manoeuvre From The Sea (OMFTS) whereby the sea is used
as a manoeuvre space, and command and control is fast enough to cope with large amounts of
information, but at the same time allow subordinates maximum flexibility to use their
initiative, is increasingly attractive. It will be important not only for the combat elements to be
able to use this new concept, but the Combat Service Support (CSS) elements as well
<book>
No full textXML wordt in veel situaties gebruikt, en voor dat gebruik worden talloze tools gebouwd. Er zijn verschillende manieren om XML-tools te ontwikkelen, en dit artikel behandelt de voor- en nadelen van de verschillende alternatieven. XML en XML-tools De uitgever Kluwer biedt verschillende soorten informatie aan, zoals wetteksten en belastinggidsen. Deze informatie heeft vaak een vaste structuur: een wet heeft bijvoorbeeld altijd een nummer, en een belastinggids beschrijft componenten die voorkomen op het inkomstenbelastingformulier. De structuur verschilt echter van informatiesoort tot informatiesoort. Voor de beschrijving van een document van dit soort structuren gebruikt Kluwer de Extensible Markup Language (XML) [6], en voor de beschrijving van een structuur zelf een Document Type Definitions (DTD) of een Schema. Een manier om de populariteit van een onderwerp te bepalen is Google te vragen hoe vaak een term voorkomt op het Web, of eigenlijk, in de databases van Google. Zo komen de Beatles bijna 3 miljoen keer voor, en ABBA honderdduizend keer. XML komt ongeveer 20 miljoen keer voor, en verslaat daarmee alle programmeertalen behalve Java. Een andere populariteitsmaat is het aantal vierkante meters boekenplank dat in beslag wordt genomen door boeken over het onderwerp in een academische boekhandel. In mijn lokale boekhandel verslaat XML menig andere nieuwe technologie. Maar wat is XML? XML is een eenvoudig, flexibel tekstformaat, dat veel gebruikt wordt voor het uitwisselen van data op het internet, maar ook tussen bedrijven onderling, en tussen bedrijven en hun klanten. Hier is een voorbeeld van een XML document
ClueS Collusive Stealing Framework
No full text<p>Please check the code here for now (anonymous git repository): </p><p>https://anonymous.4open.science/r/federated-stealing-D782/README.md</p>
Fabrication of Nanoslits with <111> Etching TSWE Method
No full textIn this paper, we report a modified three step anisotropic wet etching (TSWE) method to fabricate solid-state silicon nanoslits. The slit-opening process is performed by <111> crystal plane etching. The etching rate of the <111> crystal plane is reasonably slow as it is only 1/45 of the <100> etching rate, thus allowing and therefore good slits-opening controllability. By slowly etching the <111> crystal plane, the over-etching was effectively reduced. Perfectly rectangular nanoslits with different dimensions were successfully obtained. The smallest achieved feature size of the nanoslit is 8.3 nm.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic Components, Technology and Material
MULTIFRACTAL q RÉNYI DIMENSIONS OF POLISH SPACES FOR q < 1
No full text In earlier work the second author investigated the multifractal q Rényi dimensions of Polish spaces for q ≥ 1. In this paper we complement those results by investigating the multifractal q Rényi dimensions of Polish spaces for q < 1. </jats:p
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