Reducing stiction in microelectromechanical systems by rough nanometer-scale films grown by atomic layer deposition

Autor: James Dekker, Heini Ritala, Eero Santala, H. Pohjonen, Hannu Kattelus, Ari Häärä, Riikka L. Puurunen, Tommi Suni, Markku Kainlauri, Jyrki Kiihamäki, Markku Leskelä

Publikováno v: Puurunen, R, Häärä, A, Saloniemi, H, Dekker, J, Kainlauri, M, Pohjonen, H, Suni, T, Kiihamäki, J, Santala, E, Leskelä, M & Kattelus, H 2012, ' Reducing stiction in microelectromechanical systems by rough nanometer-scale films grown by atomic layer deposition ', Sensors and Actuators A: Physical, vol. 188, pp. 240-245 . https://doi.org/10.1016/j.sna.2012.01.040

Atomic layer deposition (ALD) can be used to grow pinhole-free nanometer-thin conformal inorganic films at low temperatures, making it of interest for many applications in MEMS (microelectromechanical systems). Stiction during device operation remain

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d5f1d1776a3915a291a3c64bbc954fb
https://doi.org/10.1016/j.sna.2012.01.040

Accuracy of a registration procedure for brain SPET and MRI

Autor: Toivo Katila, Päivi Nikkinen, K. Liewendahl, Ari Visa, Outi Sipilä, Sauli Savolainen, H. Pohjonen, V.-P. Poutanen

Publikováno v: University of Helsinki

Phantom experiments and simulations were performed to evaluate the significance of different error sources in a clinical registration procedure for brain SPET and MRI based on external markers. The results from the phantom experiments were used to ad

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a867052255f1944b8463f55a5cde918
https://doi.org/10.1097/00006231-199706000-00004

Registration and display of brain SPECT and MRI using external markers

Autor: P. Karp, Toivo Katila, Eero Salli, J. Ylä-Jääski, Jyrki Launes, H. Pohjonen, Outi Sipilä, K. Liewendahl, Oili Salonen, Päivi Nikkinen

Publikováno v: Neuroradiology. 38:108-114

Accurate anatomical localisation of abnormalities observed in brain perfusion single-photon emission computed tomography (SPECT) is difficult, but can be improved by correlating data from SPECT and other tomographic imaging modalities. For this purpo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcf3919ae317dce33e6227b03bac2f44
https://doi.org/10.1007/bf00604791

Integrated regional services: Are working process changes desirable and achievable?

Autor: H. Pohjonen, J. Kinnunen, Carola Grönhagen-Riska, Kari Harno, M. Kekomäki

Publikováno v: Journal of Telemedicine and Telecare. 8:26-28

summary In the hospital district of Helsinki and Uusimaa, 32 municipalities with one or more health centres provide primary care to their residents. Legal and organizational barriers between primary care and hospital care impede the continuity of pat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df4c05b4e144e5eb6d23b6f5d1a9d8e5
https://doi.org/10.1258/13576330260440763

ECWT: Antenna Switch Linearity Requirements for GSM/WCDMA Mobile Phone Front-Ends

Autor: Tero Tapio Ranta, Juha Ellä, H. Pohjonen

Publikováno v: The European Conference on Wireless Technology, 2005..

The design of the RF front-end part in modern cellular phones is becoming increasingly complex and demanding due to increasing number of frequency bands and modes that the phone needs to operate in. One of the main components of the RF front-end is t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e565c2f90acbad89c591e96241fb4f97
https://doi.org/10.1109/ecwt.2005.1617645