Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Peter Andris"'
Publikováno v:
Measurement Science Review. 22:80-83
This article describes the analysis of the NMR (Nuclear Magnetic Resonance) stabilizer signal. Magnetic field of the standard is created using an electromagnet. Sufficiently high stability of the magnetic field is achieved with the help of a stabiliz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6de4a5bab0e79b9e8ab940a1922aea21
https://doi.org/10.2478/msr-2022-0010
https://doi.org/10.2478/msr-2022-0010
Publikováno v:
Measurement Science Review, Vol 21, Iss 6, Pp 205-208 (2021)
This article describes the measurement of the relation between input and output signals using two techniques: with a signal generator and with the thermal noise of a known resistance. Each of the techniques has its advantages and disadvantages. Both
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47a57d4d6a804d545291d6dee212eaf1
https://doi.org/10.2478/msr-2021-0028
https://doi.org/10.2478/msr-2021-0028
Autor:
Ivan Frollo, Peter Andris
Publikováno v:
Measurement Science Review, Vol 20, Iss 5, Pp 236-240 (2020)
The article analyzes the sensitivity of unmatched receiving coil for the NMR scanner. Receiver of the scanner was investigated from the point of view of noise features. Theory of the noise figure has been modified to utilize the receiver for digitiza
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a66fcc09c957788ad9724f179ff2772
https://doaj.org/article/d7fe67ecc7174d8ca2c3f720f8e48cc0
https://doaj.org/article/d7fe67ecc7174d8ca2c3f720f8e48cc0
Publikováno v:
Scopus-Elsevier
Receiver of the NMR scanner was investigated from the point of view of noise features. Theory of the noise figure has been modified to utilize the receiver for the digitization of its own noise and the noise figure calculation. The resulting equation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e5c3508eedf949047152b3056ec7cc7
https://doi.org/10.23919/measurement47340.2019.8779891
https://doi.org/10.23919/measurement47340.2019.8779891
Publikováno v:
Mathematical Problems in Engineering, Vol 2019 (2019)
This article describes the measurement and evaluation of the system noise figure of a nuclear magnetic resonance spectrometer. A method was used which involved the console of the spectrometer, calibrated for real voltage (in volts), and used for nois
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a72dde3a5c0a967758ed4e2b664e8dc
https://doaj.org/article/4fc368d6a1f0436b9a0237cec4dc8032
https://doaj.org/article/4fc368d6a1f0436b9a0237cec4dc8032
Autor:
Ivan Frollo, Peter Andris
Publikováno v:
Measurement. 77:29-33
This article describes the measurement and evaluation of noise and interference in experiments with nuclear magnetic resonance (NMR). Their presence in experimental results causes irreversible artefacts in measured images or errors in the calculated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8dbcbe326f0a8b57720a96b2f9c36f80
https://doi.org/10.1016/j.measurement.2015.09.003
https://doi.org/10.1016/j.measurement.2015.09.003
Publikováno v:
Measurement Science Review, Vol 15, Iss 6, Pp 313-318 (2015)
Circular samples are the frequent objects of "in-vitro" investigation using imaging method based on magnetic resonance principles. The goal of our investigation is imaging of thin planar layers without using the slide selection procedure, thus only 2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a790c324063230b5eac4ff25f8bd13cd
https://doi.org/10.1515/msr-2015-0042
https://doi.org/10.1515/msr-2015-0042
Publikováno v:
Measurement. 64:29-33
This article describes theoretical and practical results of experiments with home-made receive coils for an NMR scanner. A receive coil must ensure good sensitivity of the whole receiving chain, therefore the qualities of the coil are analysed togeth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a8c02ec70367f993bfd54682ce0d34f
https://doi.org/10.1016/j.measurement.2014.12.035
https://doi.org/10.1016/j.measurement.2014.12.035
Publikováno v:
Measurement. 55:408-412
This article describes the noise measurement of a preamplifier with high input impedance designed for experiments with receive coils in nuclear magnetic resonance (NMR). The noise of the preamplifier was determined in two ways. A circuital analysis o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48cbbdfe5bd41620c539c28484edc797
https://doi.org/10.1016/j.measurement.2014.05.032
https://doi.org/10.1016/j.measurement.2014.05.032
Publikováno v:
Advanced Materials Research. 740:618-623
Soft magnetic field samples were placed into the homogenous magnetic field of an imager based on nuclear magnetic resonance. Several samples made of a soft magnetic material (cut from a data disc) were tested. Theoretical computations on a magnetic d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c03f232bf77b50a10a340c0c31440f2e
https://doi.org/10.4028/www.scientific.net/amr.740.618
https://doi.org/10.4028/www.scientific.net/amr.740.618