Search Results - "Makela, Timo"

Laboratory evaluation of particle-size selectivity of optical low-cost particulate matter sensors by Kuula, Joel, Mäkelä, Timo, Aurela, Minna, Teinilä, Kimmo, Varjonen, Samu, González, Ãscar, Timonen, Hilkka

“…Low-cost particulate matter (PM) sensors have been under investigation as it has been hypothesized that the use of low-cost and easy-to-use sensors could allow…”
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The local ship speed reduction effect on black carbon emissions measured at a remote marine station by Heikkilä, Mikko, Luoma, Krista, Mäkelä, Timo, Grönholm, Tiia

“…Speed restrictions for ships have been introduced locally to reduce the waves and turbulence causing erosion, and safety hazards, and to mitigate the air and…”
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A simple procedure for correcting loading effects of aethalometer data by VIRKKULA, Aki, MÄKELÄ, Timo, HILLAMO, Risto, YLI-TUOMI, Tarja, HIRSIKKO, Anne, HÄMERI, Kaarle, KOPONEN, Ismo K

“…A simple method for correcting for the loading effects of aethalometer data is presented. The formula BC(CORRECTED) = (1 + k x ATN) x BC(NONCORRECTED), where…”
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Interannual and seasonal variability of the air–sea CO2 exchange at Utö in the coastal region of the Baltic Sea by Honkanen, Martti, Aurela, Mika, Hatakka, Juha, Haraguchi, Lumi, Kielosto, Sami, Mäkelä, Timo, Seppälä, Jukka, Simo-Matti Siiriä, Stenbäck, Ken, Tuovinen, Juha-Pekka, Ylöstalo, Pasi, Laakso, Lauri

“…Oceans alleviate the accumulation of atmospheric CO2 by absorbing approximately a quarter of all anthropogenic emissions. In the deep oceans, carbon uptake is…”
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The diurnal cycle of pCO2 in the coastal region of the Baltic Sea by Honkanen, Martti, Müller, Jens Daniel, Seppälä, Jukka, Rehder, Gregor, Kielosto, Sami, Ylöstalo, Pasi, Mäkelä, Timo, Hatakka, Juha, Laakso, Lauri

“…The direction and magnitude of carbon dioxide fluxes between the atmosphere and the sea are regulated by the gradient in the partial pressure of carbon dioxide…”
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Measuring turbulent CO2 fluxes with a closed-path gas analyzer in a marine environment by Honkanen, Martti, Tuovinen, Juha-Pekka, Laurila, Tuomas, Mäkelä, Timo, Hatakka, Juha, Kielosto, Sami, Laakso, Lauri

“…In this study, we introduce new observations of sea–air fluxes of carbon dioxide using the eddy covariance method. The measurements took place at the Utö…”
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Chemical composition of fine particles in fresh smoke plumes from boreal wild-land fires in Europe by Saarnio, Karri, Aurela, Minna, Timonen, Hilkka, Saarikoski, Sanna, Teinilä, Kimmo, Mäkelä, Timo, Sofiev, Mikhail, Koskinen, Jarkko, Aalto, Pasi P., Kulmala, Markku, Kukkonen, Jaakko, Hillamo, Risto

“…A series of smoke plumes was detected in Helsinki, Finland, during a one-month-lasting period in August 2006. The smoke plumes originated from wildfires close…”
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Driver and passenger exposure to aerosol particles in buses and trams in Helsinki, Finland by Asmi, Eija, Antola, Matti, Yli-Tuomi, Tarja, Jantunen, Matti, Aarnio, Päivi, Mäkelä, Timo, Hillamo, Risto, Hämeri, Kaarle

“…This study investigates commuter and driver exposure to aerosol particles in buses and trams in Helsinki, Finland. Particle number and PM 2.5 concentrations…”
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Size Distribution Measurement of Carbonaceous Particulate Matter Using a Low Pressure Impactor with Quartz Fiber Substrates by Saarikoski, Sanna, Frey, Anna, Mäkelä, Timo, Hillamo, Risto

“…The collection characteristics of a small deposit area low pressure impactor (SDI) were studied in order to employ the impactor for size distribution…”
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Evaluation of Methane Emissions Originating from LNG Ships Based on the Measurements at a Remote Marine Station by Grönholm, Tiia, Mäkelä, Timo, Hatakka, Juha, Jalkanen, Jukka-Pekka, Kuula, Joel, Laurila, Tuomas, Laakso, Lauri, Kukkonen, Jaakko

“…We analyzed pollution plumes originating from ships using liquefied natural gas (LNG) as a fuel. Measurements were performed at a station located on the Utö…”
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Comprehensive Characterization of Original 10-Stage and 7-Stage Modified Berner Type Impactors by Štefancová, Lucia, Schwarz, Jaroslav, Mäkelä, Timo, Hillamo, Risto, Smolík, Jiří

“…Two cascade impactors, a Berner Low Pressure Impactor (BLPI model 25/0.018) and a modified BLPI (with a lower pressure drop) were characterized experimentally…”
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Response Characterization of an Inexpensive Aerosol Sensor by Kuula, Joel, Mäkelä, Timo, Hillamo, Risto, Timonen, Hilkka

“…Inexpensive aerosol sensors have been considered as a complementary option to address the issue of expensive but low spatial coverage air quality monitoring…”
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Development of particle number size distribution near a major road in Helsinki during an episodic inversion situation by Kerminen, Veli-Matti, Pakkanen, Tuomo A., Mäkelä, Timo, Hillamo, Risto E., Sillanpää, Markus, Rönkkö, Topi, Virtanen, Annele, Keskinen, Jorma, Pirjola, Liisa, Hussein, Tareq, Hämeri, Kaarle

“…The influence of traffic on urban air quality is highest at low wind speeds and the presence of a temperature inversion. By relying on detailed aerosol…”
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Implantation of CRT pacemaker during pregnancy: estimated fetal radiation dose by Manninen, Anna-Leena, Järvinen, Jukka, Sierpowska, Joanna, Mäkelä, Timo J, Rissanen, Tuomas T

“…Abstract The benefits of a cardiac resynchronization therapy (CRT) implantation are known in severe heart failure and its implantation may also be considered…”
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CONTEMPORARY RADIATION DOSES IN INTERVENTIONAL CARDIOLOGY: A NATIONWIDE STUDY OF PATIENT DOSES IN FINLAND by Järvinen, Jukka, Sierpowska, Joanna, Siiskonen, Teemu, Järvinen, Hannu, Kiviniemi, Tuomas, Rissanen, Tuomas T, Matikka, Hanna, Niskanen, Eini, Hurme, Saija, Larjava, Heli R S, Mäkelä, Timo J, Strengell, Satu, Eskola, Markku, Parviainen, Teuvo, Hallinen, Elina, Pirinen, Markku, Kivelä, Antti, Teräs, Mika

“…Abstract The amount of interventional procedures such as percutaneous coronary intervention (PCI), transcatheter aortic valve implantation (TAVI), pacemaker…”
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CONTEMPORARY RADIATION DOSES IN INTERVENTIONAL CARDIOLOGY: A NATIONWIDE STUDY OF PATIENT SKIN DOSES IN FINLAND by Järvinen, Jukka, Sierpowska, Joanna, Siiskonen, Teemu, Husso, Minna, Järvinen, Hannu, Kiviniemi, Tuomas, Rissanen, Tuomas T, Lindholm, Carita, Matikka, Hanna, Larjava, Heli R S, Mäkelä, Timo J, Strengell, Satu, Eskola, Markku, Parviainen, Teuvo, Hallinen, Elina, Pirinen, Markku, Kivelä, Antti, Teräs, Mika

“…Abstract In contemporary interventional cardiology, for typical elderly patients, the most severe radiation-related harm to patients can be considered to come…”
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Size and Composition of Airborne Particles from Pavement Wear, Tires, and Traction Sanding by Kupiainen, Kaarle J, Tervahattu, Heikki, Räisänen, Mika, Mäkelä, Timo, Aurela, Minna, Hillamo, Risto

“…Mineral matter is an important component of airborne particles in urban areas. In northern cities of the world, mineral matter dominates PM10 during spring…”
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The concentrations and composition of and exposure to fine particles (PM 2.5) in the Helsinki subway system by Aarnio, Päivi, Yli-Tuomi, Tarja, Kousa, Anu, Mäkelä, Timo, Hirsikko, Anne, Hämeri, Kaarle, Räisänen, Mika, Hillamo, Risto, Koskentalo, Tarja, Jantunen, Matti

“…Fine particulate matter (PM 2.5) and particle number concentrations were monitored in the Helsinki subway system during a two-weeks’ measurement campaign in…”
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Generation of urban road dust from anti-skid and asphalt concrete aggregates by Tervahattu, Heikki, Kupiainen, Kaarle J., Räisänen, Mika, Mäkelä, Timo, Hillamo, Risto

“…Road dust forms an important component of airborne particulate matter in urban areas. In many winter cities the use of anti-skid aggregates and studded tires…”
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Emissions of fine particles, NOx, and CO from on-road vehicles in Finland by YLI-TUOMI, Tarja, AARNIO, Päivi, PIRJOLA, Liisa, MÄKELÄ, Timo, HILLAMO, Risto, JANTUNEN, Matti

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