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Visar resultat 1 - 5 av 88 uppsatser som matchar ovanstående sökkriterier.

1. 1. Physical Layer Security for MIMOTransmission of Short PacketCommunications

   Master-uppsats, Blekinge Tekniska Högskola/Institutionen för datavetenskap

   Författare :Varun Duvva; Bharath Reddy Anugu; [2024]
   Nyckelord :Physical Layer Security; Multiple-Input Multiple-Output; Short Packet communication; Maximum Ratio Combining; Maximum Ratio Transmission; and Beamforming;

   Sammanfattning : This thesis explores the practical application of Physical Layer Security (PLS) inMultiple-Input Multiple-Output (MIMO) systems, particularly focusing on ShortPacket Communication (SPC). The aim is to enhance the security of wireless com-munications against eavesdropping threats. LÄS MER

3. 2. Phase Unwrapping MRI Flow Measurements

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen Vi3

   Författare :Mio Liljeblad; [2023]
   Nyckelord :phase unwrapping; computer vision; cine MRI; NMR; flow measurements; velocity encoding; venc; energy minimization; magnetic resonance; cardiac MRI; sinotubuar junction; pulmonary artery; ascending descending aorta; laplacian algorithm; iterative graph cuts; IGC; sequential tree-reweighted message passing; TRW-S; velocity to noise ratio; VNR; retrospective wrapping; energy formulation;

   Sammanfattning : Magnetic resonance images (MRI) are acquired by sampling the current of induced electromotiveforce (EMF). EMF is induced due to flux of the net magnetic field from coherent nuclear spins with intrinsic magnetic dipole moments. LÄS MER

4. 3. Evaluation of Heat Mapping Techniques – the Case of Linköping

   Master-uppsats, Linköpings universitet/Institutionen för tema; Linköpings universitet/Filosofiska fakulteten

   Författare :Pei Zhao; [2023]
   Nyckelord :correlation analysis; spatial analysis; land surface temperature LST ; mean radiant temperature MRT ; vulnerable population;

   Sammanfattning : Land surface temperature (LST) and mean radiant temperature (MRT) are commonly used as proxies to evaluate urban heat environments. Many scholars use one of them to represent heat exposure when assessing the urban thermal environment. LÄS MER

5. 4. Interpreting Mental Rotation Performance in Self-Described Aphantasia through Cognitive Penetrability

   Master-uppsats, Umeå universitet/Institutionen för psykologi

   Författare :Dániel Pénzes; [2023]
   Nyckelord :mental imagery debate; cognitive penetrability; aphantasia; VVIQ; OSIQ; mental rotation;

   Sammanfattning : Mental images are unique mental representations and the depictive view in the imagery debate states that mental images have similar spatial structures as their corresponding external object. The propositional view, however, contends that beliefs about the external world influence a mental image – also known as the cognitive penetrability theory –, therefore mental images cannot be described in visual terms. LÄS MER

7. 5. Impact of the autoencoder-based FINTA tractogram filtering method on brain networks in subjects with Mild Cognitive Impairment

   Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Författare :Teodor Pstrusiński; [2023]
   Nyckelord :Tractography; Autoencoder; diffusion MRI; Filtering; Graph; Connectome; Traktografi; Autoencoder; diffusions MRT; Filtrering; Graf; Konnektom;

   Sammanfattning : Diffusion Magnetic Resonance Imaging (dMRI) is a method for measuring molecular diffusion in biological tissue microstructure. This information can be used to predict the location and orientation of white matter fibers in the brain, a process known as tractography. LÄS MER