Výsledky vyhledávání - "David Gomes-Martins"

Integration of a capacitive pressure sensing system into the outer catheter wall for coronary artery FFR measurements

Autor: Anu Kärkkäinen, Jaakko Saarilahti, Brendan Marrinan, Feng Gao, Frank Stam, Heikki Kuisma, Sebastian Pintal, David Gomes Martins

Publikováno v: Stam, F, Kuisma, H, Gao, F, Saarilahti, J, Gomes Martins, D, Kärkkäinen, A, Marrinan, B & Pintal, S 2017, Integration of a capacitive pressure sensing system into the outer catheter wall for coronary artery FFR measurements . in I Giouroudi, I Giouroudi, M Delgado-Restituto & S van den Driesche (eds), Bio-MEMS and Medical Microdevices III ., 1024703, International Society for Optics and Photonics SPIE, Proceedings of SPIE, vol. 10247, Bio-MEMS and Medical Microdevices III Conference 2017, Barcelona, Spain, 9/05/17 . https://doi.org/10.1117/12.2263779

The deadliest disease in the world is coronary artery disease (CAD), which is related to a narrowing (stenosis) of blood vessels due to fatty deposits, plaque, on the arterial walls. The level of stenosis in the coronary arteries can be assessed by F

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0781fbbf259ff73537c6034e2d894fc7
https://cris.vtt.fi/en/publications/f028d6f9-a218-454c-9922-efd02b7ce020

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A DLL clock generator for a high speed A/D-converter with 1 ps jitter and skew calibrator with 1 ps precision in 0.35 μm CMOS

Autor: David Gomes Martins, Arto Rantala, Markku Åberg

Publikováno v: Analog Integrated Circuits and Signal Processing. 50:69-79

This paper presents a clock generator circuit for a high-speed analog-to-digital converter (ADC). A time-interleaved ADC requires accurate clocking for the converter fingers. The target ADC has 12 interleaved fingers each running at a speed of 166 MS

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ac7bc8d0d00044e85dfa7cab8f6ef368
https://doi.org/10.1007/s10470-006-9398-5

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Near-field measurements of submillimeter-wave reflectarrays

Autor: Aleksi Tamminen, Antti V. Räisänen, Paivi Koivisto, Reijo Tuovinen, Arttu Luukanen, P. Rantakari, Juha Ala-Laurinaho, Sampo Makela, Markku Sipilä, Jussi Säily, David Gomes-Martins, Janne Häkli

Publikováno v: Tamminen, A, Ala-Laurinaho, J, Mäkelä, S, Gomes Martins, D, Häkli, J, Koivisto, P, Rantakari, P, Säily, J, Tuovinen, R, Luukanen, A, Sipilä, M & Räisänen, A V 2013, Near-field measurements of submillimeter-wave reflectarrays . in D A Wikner & A R Luukanen (eds), Passive and Active Millimeter-Wave Imaging XVI ., 871506, International Society for Optics and Photonics SPIE, Bellingham, Proceedings of SPIE, vol. 8715, SPIE Defense, Security, and Sensing 2013, Baltimore, Maryland, United States, 29/04/13 . https://doi.org/10.1117/12.2018606

We present results of experimental characterization of static 650-GHz reflectarrays. The reflectarrays are based on 123-μm circular microstrip patch antennas with tuning stubs as phase shifters. The static reflectarrays are considered as predecessor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db87cff33055bacfc0ada12dc53fde9c
https://doi.org/10.1117/12.2018606

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O COTIDIANO DA EDUCAÇÃO INFANTIL E A PRESENÇA DA EDUCAÇÃO FÍSICA NA POÉTICA DE SER CRIANÇA

Autor: David Gomes Martins, Nilton Poletto Pimentel, Victor José Machado de Oliveira

Publikováno v: Pensar a Prática; Vol. 16 No. 1 (2013)
Pensar a Prática; v. 16 n. 1 (2013)
Pensar a Prática
Universidade Federal de Goiás (UFG)
instacron:UFG

Este estudo e fruto das atividades desenvolvidas no Estagio Curricular Supervisionado e tem por objetivo apresentar as experiencias obtidas durante o percurso do mesmo discutindo a presenca da educacao fisica no cotidiano da educacao infantil num Cen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57601508dd1ef2a15f609f77ad0e139b
https://revistas.ufg.br/fef/article/view/16188

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Towards video rate imaging at submillimetre-waves — Finnish developments of passive multi-band imaging and holographic submm-wave beam steering at VTT

Autor: Janne Hakli, Reijo Tuovinen, A. Luukanen, Jussi Säily, Mikko Leivo, Hans Toivanen, Juha Ala-Laurinaho, David Gomes-Martins, Tero Kiuru, Paivi Koivisto, Aleksi Tamminen, Antti V. Räisänen, Anssi Rautiainen

Publikováno v: 2012 Asia Pacific Microwave Conference Proceedings.

Imaging at submillimetre-wave (SMMW) frequencies is of considerable interest for security applications due to potentially superior performance at longer stand-off ranges in comparison to mm-wave imaging thanks to reduced diffraction. We have demonstr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3506d91c00adc6a43640b73e52898c9c
https://doi.org/10.1109/apmc.2012.6421734

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Reflectarray for 120-GHz beam steering application: design, simulations, and measurements

Autor: Aleksi Tamminen, Mikko Varonen, Arttu Luukanen, Jussi Säily, Antti V. Räisänen, Kari Halonen, Mikko Kärkkäinen, Reijo Tuovinen, Sampo Makela, Markku Sipilä, P. Rantakari, Paivi Koivisto, Pekka Pursula, Janne Häkli, David Gomes-Martins, Juha Ala-Laurinaho

Publikováno v: Tamminen, A, Ala-Laurinaho, J, Gomes Martins, D, Häkli, J, Koivisto, P, Kärkkäinen, M, Mäkelä, S, Pursula, P, Rantakari, P, Sipilä, M, Säily, J, Tuovinen, R, Luukanen, A & Räisänen, A V 2012, Reflectarray for 120-GHz beam steering application : Design, simulations, and measurements . in D A Wikner (ed.), Proceedings of SPIE 8362 : Passive and Active Millimeter-Wave Imaging XV ., 836205, International Society for Optics and Photonics SPIE, Proceedings of SPIE, vol. 8362, Passive and Active Millimeter-Wave Imaging XV, Baltimore, Maryland, United States, 26/04/12 . https://doi.org/10.1117/12.924167

Development of a 120-GHz FMCW radar with a reflectarray as focusing element is described. The reflectarray is realized on a 150-mm silicon wafer and it has 3700 phase-modulating elements on it. The phase shifters have four discrete values to cover fu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44f3b3b7af118c57e0ee753f0ddefc90
https://doi.org/10.1117/12.924167

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Developments towards real-time active and passive submillimetre-wave imaging for security applications

Autor: Jussi Säily, A. Luukanen, David Gomes-Martins, P. Rantakari, Janne Hakli, Reijo Tuovinen, Sampo Makela, Markku Sipilä, Mikko Leivo, Hans Toivanen, Paivi Koivisto, Juha Ala-Laurinaho, Markus Gronholm, Pekka Pursula, Anssi Rautiainen, Aleksi Tamminen, Antti V. Räisänen

Publikováno v: Luukanen, A, Ala-Laurinaho, J, Leivo, M, Gomes Martins, D, Grönholm, M, Häkli, J, Koivisto, P, Mäkelä, S, Pursula, P, Rantakari, P, Sipilä, M, Säily, J, Tamminen, A, Toivanen, H, Tuovinen, R & Rautiainen, A 2012, Developments towards real-time active and passive submillimetre-wave imaging for security applications . in Proceedings : IEEE MTT-S International Microwave Symposium Digest, IMS 2012 ., 6259538, IEEE Institute of Electrical and Electronic Engineers, IEEE MTT-S International Microwave Symposium, IMS 2012, Montreal, Quebec, Canada, 17/06/12 . https://doi.org/10.1109/MWSYM.2012.6259538

Both active and passive submillimetre-wave stand-off imaging systems are under development for security imaging applications. The drivers for operation at higher frequencies have been the desire for better image resolution, smaller optics package, re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd2c904e649ed8eb86dead9d9bc5db66
https://doi.org/10.1109/MWSYM.2012.6259538

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Rapid beamsteering reflectarrays for mm-wave and submm-wave imaging radars

Autor: P. Rantakari, Paivi Koivisto, Arttu Luukanen, Pekka Pursula, Jussi Säily, Aleksi Tamminen, Juha Ala-Laurinaho, Markku Sipilä, Janne Häkli, David Gomes Martins, Reijo Tuovinen

Publikováno v: Luukanen, A, Ala-Laurinaho, J, Gomes Martins, D, Häkli, J, Koivisto, P, Pursula, P, Rantakari, P, Säily, J, Tamminen, A, Tuovinen, R & Sipilä, M 2011, Rapid beamsteering reflectarrays for mm-wave and submm-wave imaging radars . in Passive Millimeter-Wave Imaging Technology XIV ., 80220M, International Society for Optics and Photonics SPIE, Proceedings of SPIE, vol. 8022, SPIE Defense, Security, and Sensing. Passive Millimeter-Wave Imaging Technology XIV, Orlando, FL, United States, 28/04/11 . https://doi.org/10.1117/12.887068

Recent developments in millimetre to submillimetre-wave imaging radars with excellent ranging resolution provide an attractive route towards stand-off imaging of concealed explosives at ranges up to several tens of meters. Present systems typically r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::197a70ec9483d17fa3de8e7f2cc461c7
https://cris.vtt.fi/en/publications/7d3ac0c8-b2ff-4ef8-9197-390c2b2d2c3c

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DLL based temperature compensated MEMS clock

Autor: David Gomes Martins, Matti Sopanen, Arto Rantala, Markku Åberg

Publikováno v: Rantala, A, Gomes Martins, D, Sopanen, M & Åberg, M 2010, DLL based temperature compensated MEMS clock . in Proceedings : 28th Norchip Conference, NORCHIP 2010 . IEEE Institute of Electrical and Electronic Engineers, Piscataway, NJ, USA, 28th Norchip Conference, NORCHIP 2010, Tampere, Finland, 15/11/10 . https://doi.org/10.1109/NORCHIP.2010.5669492

In this paper the design and implementation of a delay-locked loop based temperature compensated MEMS clock is presented. The system is providing a temperature compensated 48 MHz clock signal for the range of - 40 to 85°C. The temperature compensati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3849ef89224c40a2331cc53c103c503d
https://doi.org/10.1109/norchip.2010.5669492

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