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Exposure

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Articles 31 - 36 of 36

Full-Text Articles in Engineering

Determination Of Airborne Nanoparticles From Welding Operations, João F. Gomes Dec 2011

Determination Of Airborne Nanoparticles From Welding Operations, João F. Gomes

João F Gomes

The aim of this study is to assess the levels of airborne ultrafine particles emitted in welding processes (tungsten inert gas (TIG), metal active gas (MAG) of carbon steel and friction stir welding (FSW) of aluminium) in terms of deposited area in pulmonary alveolar tract using a Nanoparticle Surface Area Monitor (NSAM) analyzer. The obtained results showed the dependence from process parameters on emitted ultrafine particles and demonstrated the presence of ultrafine particles compared to background levels. Data indicated that the process that resulted in the lowest levels of alveolar deposited surface area (ADSA) was FSW, followed by TIG and …

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Exposure To Airborne Ultrafine Particles From Cooking In Portuguese Homes, João F. Gomes Dec 2011

Exposure To Airborne Ultrafine Particles From Cooking In Portuguese Homes, João F. Gomes

João F Gomes

No abstract provided.

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The Behaviour Of Carbon Fibre Reinforced Polymer Confined Concrete Cylinders Under High Temperature Exposure, Butje Alfonsius Louk Fanggi, Muhammad N. S Hadi Jan 2011

The Behaviour Of Carbon Fibre Reinforced Polymer Confined Concrete Cylinders Under High Temperature Exposure, Butje Alfonsius Louk Fanggi, Muhammad N. S Hadi

Faculty of Engineering - Papers (Archive)

This study investigates the effect of temperature on the behaviour of concrete cylinders wrapped with Carbon Fibre Reinforced Polymer (CFRP). The study used nine concrete cylinders in three groups; the first group was exposed to room temperature of approximately 20ºC, the second group was exposed to a cyclic temperature with a temperature range of 20ºC to 70ºC, and the third group was exposed to a prolonged temperature of 70ºC. All cylinders were then tested to failure. The study indicated that ultimate strength of cylinders wrapped with one and two layers of CFRP are significantly unchanged after being exposed to 20ºC …

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Development Of A New Marine Exposure Site On The Atlantic North-West Coast Of Ireland, Niall Holmes, L. Basheer, S. Nanukuttan, S. Srinivasan, Pam Basheer, J. Mccarter, M. Chrisp Sep 2010

Development Of A New Marine Exposure Site On The Atlantic North-West Coast Of Ireland, Niall Holmes, L. Basheer, S. Nanukuttan, S. Srinivasan, Pam Basheer, J. Mccarter, M. Chrisp

Conference papers

This paper presents a new marine exposure site being developed on the North-west Atlantic coastline of Ireland in Co. Donegal by the Centre for Built Environment Research at Queen’s University Belfast. The site will initially contain a number of large precast concrete stems, each 1.5m high, 1.5m wide and 1m thick placed on concrete plinths poured in-situ. The concrete stems will be placed at three levels to achieve different exposure conditions outlined in EN 206, namely atmospheric (XS1), a splash or spray zone (XS3) and a tidal zone (XS3) where the stems will be submerged by the incoming tide twice …

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Radiation Exposure And Mission Strategies For Interplanetary Manned Missions, C Cougnet, N Crosby, C Foullon, D Heynderickx, S Eckersley, V Guarnieri, C Lobascio, S Masiello, P Parodi, M A. Perino, R Rampini, Susanna Guatelli, Maria G. Pia, A Holmes-Siedle, P Nieminen, G Parisi, V Tamburini, P Spillantini, E Tracino Jan 2005

Radiation Exposure And Mission Strategies For Interplanetary Manned Missions, C Cougnet, N Crosby, C Foullon, D Heynderickx, S Eckersley, V Guarnieri, C Lobascio, S Masiello, P Parodi, M A. Perino, R Rampini, Susanna Guatelli, Maria G. Pia, A Holmes-Siedle, P Nieminen, G Parisi, V Tamburini, P Spillantini, E Tracino

Faculty of Engineering - Papers (Archive)

Cosmic radiation is an important problem for human interplanetary missions. The ‘‘Radiation Exposure and Mission Strategies for Interplanetary Manned Missions–REMSIM’’ study is summarised here. They are related to current strategies and countermeasures to ensure the protection of astronauts from radiation during interplanetary missions, with specific reference to: radiation environment and its variability; radiation effects on the crew; transfer trajectories and associated fluences; vehicle and surface habitat concepts; passive and active shielding concepts; space weather monitoring and warning systems.

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How Should Governments Address High Levels Of Natural Radiation And Radon--Lessons From The Chernobyl Nuclear Accident And Ramsar, Iran, S. M. Javad Mortazavi, M. Ghiassi-Nejad, Azam Niroomand-Rad, P. Andrew Karam, John R. Cameron Mar 2002

How Should Governments Address High Levels Of Natural Radiation And Radon--Lessons From The Chernobyl Nuclear Accident And Ramsar, Iran, S. M. Javad Mortazavi, M. Ghiassi-Nejad, Azam Niroomand-Rad, P. Andrew Karam, John R. Cameron

RISK: Health, Safety & Environment (1990-2002)

The authors discuss the high levels of natural background radiation in Ramsar, Iran, and offer data indicating that this has had little effect on the health of Ramsar's inhabitants. The authors then examine the implications their research could have for public health policy.

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