Zobrazeno 1 - 10
of 352
pro vyhledávání: '"Mikael Persson"'
Autor:
Hoi-Shun Lui, Mikael Persson
Publikováno v:
Sensors, Vol 24, Iss 4, p 1059 (2024)
The non-ionizing nature of microwave radiation and the low cost of microwave electronics offer innovative solutions for medical diagnosis, treatment, and health monitoring [...]
Externí odkaz:
https://doaj.org/article/62a106ca002649c1abe0a471e826aabd
Autor:
Stefan Candefjord, Linh Nguyen, Ruben Buendia, Marianne Oropeza-Moe, Nina Gjerde Andersen, Andreas Fhager, Mikael Persson, Mikael Elam, Nils Petter Oveland
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Abstract Abdominal injury is a frequent cause of death for trauma patients, and early recognition is essential to limit fatalities. There is a need for a wearable sensor system for prehospital settings that can detect and monitor bleeding in the abdo
Externí odkaz:
https://doaj.org/article/e8c9c1f168134d0fa2273d1b0c423c58
Publikováno v:
International Journal of Antennas and Propagation, Vol 2019 (2019)
We introduce the discrete dipole approximation (DDA) for efficiently calculating the two-dimensional electric field distribution for our microwave tomographic breast imaging system. For iterative inverse problems such as microwave tomography, the for
Externí odkaz:
https://doaj.org/article/6512627d2a5743f281dfd94c89111fd5
Publikováno v:
Sensors, Vol 21, Iss 3, p 729 (2021)
This paper focuses on the construction of the Jacobian matrix required in tomographic reconstruction algorithms. In microwave tomography, computing the forward solutions during the iterative reconstruction process impacts the accuracy and computation
Externí odkaz:
https://doaj.org/article/0c7b70762a2547b2b4e00cd5787a2e02
Publikováno v:
Sensors, Vol 20, Iss 4, p 1034 (2020)
Quick on-scene assessment and early intervention is the key to reduce the mortality of stroke and trauma patients, and it is highly desirable to develop ambulance-based diagnostic and monitoring devices in order to provide additional support to the m
Externí odkaz:
https://doaj.org/article/199adf7afbae40ae97a8185603fdc0c6
Motivated by the analysis of the tunneling effect for the magnetic Laplacian, we introduce an abstract framework for the spectral reduction of a self-adjoint operator to a hermitian matrix. We illustrate this framework by three applications, firstly
Externí odkaz:
http://arxiv.org/abs/2307.06712
Publikováno v:
Sensors, Vol 19, Iss 16, p 3482 (2019)
Early, preferably prehospital, detection of intracranial bleeding after trauma or stroke would dramatically improve the acute care of these large patient groups. In this paper, we use simulated microwave transmission data to investigate the performan
Externí odkaz:
https://doaj.org/article/4304f5c179234e66aabcae4458571936
Publikováno v:
Diagnostics, Vol 8, Iss 3, p 61 (2018)
A breast phantom developed at the Supelec Institute was interrogated to study its suitability for microwave tomography measurements. A microwave measurement system based on 16 monopole antennas and a vector network analyzer was used to study how the
Externí odkaz:
https://doaj.org/article/21dd211e28014ed6a4df4c28b2bada24
Autor:
Mikael Persson
Publikováno v:
Electronic Journal of Differential Equations, Vol 2005, Iss 55, Pp 1-16 (2005)
Two different self-adjoint Pauli extensions describing a spin-1/2 two-dimensional quantum system with singular magnetic field are studied. An Aharonov-Casher type formula is proved for the maximal Pauli extension and the possibility of approximation
Externí odkaz:
https://doaj.org/article/d8008e7a71fb4bde859989c6acad91e7
Publikováno v:
J Geom Anal 32, 246 (2022)
Recent work of the authors and their collaborators has uncovered fundamental connections between the Dirichlet-to-Neumann map, the spectral flow of a certain family of self-adjoint operators, and the nodal deficiency of a Laplacian eigenfunction (or
Externí odkaz:
http://arxiv.org/abs/2201.06667