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Akademický článek

Equatorial plasma bubbles in the ionosphere over Eritrea: occurrence and drift speed

Autor: R. H. Wiens, B. M. Ledvina, P. M. Kintner, M. Afewerki, Z. Mulugheta

Publikováno v: Annales Geophysicae, Vol 24, Pp 1443-1453 (2006)

An all-sky imager was installed in Asmara, Eritrea (15.4° N, 38.9° E, 7° N dip) and used to monitor the OI 630-nm nightglow. Nine months of data were studied between September 2001 and May 2002, a time including the recent maximum in the solar

Externí odkaz: https://doaj.org/article/2426fb8843504e68af406e74aaad57d3

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Akademický článek

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Akademický článek

Analysis of the seasonal variations of equatorial plasma bubble occurrence observed from Haleakala, Hawaii

Autor: J. J. Makela, B. M. Ledvina, M. C. Kelley, P. M. Kintner

Publikováno v: Annales Geophysicae, Vol 22, Pp 3109-3121 (2004)

Over 300 nights of airglow and GPS scintillation data collected between January 2002 and August 2003 (a period near solar maximum) from the Haleakala Volcano, Hawaii are analyzed to obtain the seasonal trends for the occurrence of equatorial plasma

Externí odkaz: https://doaj.org/article/d5729d9386a142f2a7e3dfb8127c69a3

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Akademický článek

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Imaging of transfection and intracellular release of intact, non-labeled DNA using fluorescent nanodiamonds

Autor: Petr Cigler, Milos Nesladek, Veronika Benson, Martin Bunček, A. Fiserova, M. Ledvina, Vladimira Petrakova, Jan Stursa

Efficient delivery of stabilized nucleic acids (NAs) into cells and release of the NA payload are crucial points in the transfection process. Here we report on the fabrication of a nanoscopic cellular delivery carrier that is additionally combined wi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dafd4570ad2a00a37e47618fd6a407a3
http://hdl.handle.net/1942/22075

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Efficient Real-Time Generation of Bit-Wise Parallel Representations of Oversampled Carrier Replicas

Autor: Brent M. Ledvina

Publikováno v: IEEE Transactions on Aerospace and Electronic Systems. 47:2921-2933

An algorithm has been developed that efficiently generates in-phase and quadrature carrier replicas over a range of Doppler shift frequencies and initial phase offsets. This algorithm provides a new method that aids in bit-wise parallel baseband mixi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bd382744493eaf12ef3af4109a206441
https://doi.org/10.1109/taes.2011.6034674

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Data-Driven Testbed for Evaluating GPS Carrier Tracking Loops in Ionospheric Scintillation

Autor: Paul M. Kintner, Mark L. Psiaki, Todd E. Humphreys, Alessandro P. Cerruti, Brent M. Ledvina

Publikováno v: IEEE Transactions on Aerospace and Electronic Systems. 46:1609-1623

A large set of equatorial ionospheric scintillation data has been compiled, used to characterize features of severe scintillation that impact Global Positioning System phase tracking, and used to develop a scintillation testbed for evaluating trackin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8009d005728a644c41cb9df16a6b80e9
https://doi.org/10.1109/taes.2010.5595582

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Charge-sensitive fluorescent nanosensors created from nanodiamonds

Autor: M. Ledvina, Petr Cigler, Milos Nesladek, Ivan Rehor, Vladimira Petrakova, Jan Stursa

Publikováno v: Nanoscale. 7(29)

We show that fluorescent nanodiamonds (FNDs) are among the few types of nanosensors that enable direct optical reading of noncovalent molecular events. The unique sensing mechanism is based on switching between the negatively charged and neutral stat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9d041d333e829328451639577b6c205
https://pubmed.ncbi.nlm.nih.gov/26138745

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The ionosphere, radio navigation, and global navigation satellite systems

Autor: Paul M. Kintner, Brent M. Ledvina

Publikováno v: Advances in Space Research. 35:788-811

This article is a review of Global Navigation Satellite Systems (GNSS) for space scientists who are interested in how GNSS signals and observables can be used to understand ionospheric dynamics and, conversely, how ionospheric dynamics affect the ope

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::926e9f7531e5475610a80ed8ac57c3be
https://doi.org/10.1016/j.asr.2004.12.076

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Analysis of the seasonal variations of equatorial plasma bubble occurrence observed from Haleakala, Hawaii

Autor: Jonathan J. Makela, Michael C. Kelley, Paul M. Kintner, Brent M. Ledvina

Publikováno v: Annales Geophysicae, Vol 22, Iss 9, Pp 3109-3121 (2004)
Annales Geophysicae, Vol 22, Pp 3109-3121 (2004)
Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 2004, 22 (9), pp.3109-3121

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d7ecb824709fe780c724856276a8667
http://www.ann-geophys.net/22/3109/2004/angeo-22-3109-2004.pdf

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