Výsledky vyhledávání - "Joni Mäkinen"

Akademický článek

Defect localization by an extended laser source on a hemisphere

Autor: Daniel Veira Canle, Joni Mäkinen, Richard Blomqvist, Maria Gritsevich, Ari Salmi, Edward Hæggström

Publikováno v: Scientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)

Abstract The primary goal of this study is to localize a defect (cavity) in a curved geometry. Curved topologies exhibit multiple resonances and the presence of hotspots for acoustic waves. Launching acoustic waves along a specific direction e.g. by

Externí odkaz: https://doaj.org/article/2f896e47cd3e4ec48d90af7cab4b486c

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Akademický článek

Ice-sheet scale distribution and morphometry of triangular-shaped hummocks (murtoos): a subglacial landform produced during rapid retreat of the Scandinavian Ice Sheet

Autor: Antti E. K. Ojala, Gustaf Peterson, Joni Mäkinen, Mark D. Johnson, Kari Kajuutti, Jukka-Pekka Palmu, Elina Ahokangas, Christian Öhrling

Publikováno v: Annals of Glaciology, Vol 60, Pp 115-126 (2019)

High-resolution digital elevation models of Finland and Sweden based on LiDAR (Light Detection and Ranging) reveal subglacial landforms in great detail. We describe the ice-sheet scale distribution and morphometric characteristics of a glacial landfo

Externí odkaz: https://doaj.org/article/d7e1f5d96d50466ab46c10dd1a88ea0c

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Akademický článek

Localizing a target inside an enclosed cylinder with a single chaotic cavity transducer augmented with supervised machine learning

Autor: Tom Sillanpää, Krista Longi, Joni Mäkinen, Timo Rauhala, Arto Klami, Ari Salmi, Edward Hæggström

Publikováno v: AIP Advances, Vol 11, Iss 11, Pp 115104-115104-10 (2021)

Ultrasound is employed in, e.g., non-destructive testing and environmental sensing. Unfortunately, conventional single-element ultrasound probes have a limited acoustic aperture. To overcome this limitation, we employ a modern method to increase the

Externí odkaz: https://doaj.org/article/d7a116cc0e8c4851af0b56ddf3e01310

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Akademický článek

Water blister geomorphology and subglacial drainage sediments: an example from the bed of the Fennoscandian Ice Sheet in SW Finland

Autor: Joni Mäkinen, Christine F. Dow, Elina Ahokangas, Antti Ojala, Kari Kajuutti, Juulia Kautto, Jukka-Pekka Palmu

Publikováno v: Journal of Glaciology, Pp 1-17

This study presents the first light detection and ranging (LiDAR)-based morphometric description of a water blister from a past ice-sheet bed caused by rapid supraglacial drainage. The blister formed during the rapid early Holocene deglaciation of th

Externí odkaz: https://doaj.org/article/f97a345d6e3d49fcbd18a9bcd617b5fe

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Landscape generation by subglacial hydrology beneath the Fennoscandian Ice Sheet

Autor: Adam Hepburn, Christine Dow, Antti Ojala, Joni Mäkinen, Ahokangas Elina, Jukka-Pekka Palmu, Jussi Hovikoski, Kari Kajuutti

Unknown basal characteristics limit our ability to simulate the subglacial hydrology of rapidly thinning contemporary ice sheets. Sediment-based landforms deposited beneath former ice sheets can provide crucial information about basal hydrology durin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::03e51e505b58c6bb06b6d47eb30cddde
https://doi.org/10.5194/egusphere-egu23-7408

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Geophysical characterization of late-Quaternary glaciofluvial complex and glacial stratigraphy in the Satakunta sandstone area, Köyliö, southwest Finland

Autor: Alireza Malehmir, Joni Mäkinen, Antti Pasanen, Georgiana Maries, Suvi Heinonen, Matti Ensio Pajunen, Elina Ahokangas

Publikováno v: Quaternary Research. 100:135-153

We acquired high-resolution reflection seismic data using a broadband digital-based landstreamer system to characterize a depression related to the Mesoproterozoic (Jothnian) Satakunta sandstone basin in the Köyliö study area, southwest Finland. Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b76bb70af95e48426edabf44e3245d45
https://doi.org/10.1017/qua.2020.77

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