Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Tuomo Alasoini Name of the doctoral dissertation Workplace Development Programmes as Institutional Entrepreneurs: Why They Produce Change and Why They Do Not Publisher School of Science Unit Department of Industrial Engineering and Management Series Aalto University publication series DOCTORAL DISSERTATIONS 12/2016 Field of re...

The principal results of triggered-lightning experiments conducted at the International Center for Lightning Research and Testing (ICLRT) at Camp Blanding, Florida, from 1993 through 2002 are reviewed. These results include (a) characterization of the close lightning electromagnetic environment, (b) first lightning return-stroke speed profiles within 400 m of ground, (c) new insights into the m...

A review of lightning protection concepts introduced by Benjamin Franklin (18th century) and James Clerk Maxwell (19th century) is given. Modern approaches to lightning protection of various structures and systems are discussed. In particular, the widely used electrogeometrical model (one version of which is the Rolling Sphere Method) and the topological shielding are presented. Bonding require...

A healthy gut microbiota plays many crucial functions in the host, being involved in the correct development and functioning of the immune system, assisting in the digestion of certain foods and in the production of health-beneficial bioactive metabolites or 'pharmabiotics'. These include bioactive lipids (including SCFA and conjugated linoleic acid) antimicrobials and exopolysaccharides in add...

Due to the expected climate change driven increase of extreme weather events, damage risks for infrastructure and buildings are rising. Hence spatial decision-support material is necessary to enhance risk management and planning strategies. The presented study contributes to this topic by means of an analysis of cloud-to-ground lightning patterns and their impact on structural facilities using ...

BACKGROUND Since the U.S. National Lightning Detection Network (NLDN) became fully operational in 1989, meteorologists have spent considerable time trying to identify cloud-to-ground (CG) lightning characteristics that are uniquely associated with severe weather. Many studies focused on the dominant CG lightning polarity as a potential indicator of severe weather. Knapp (1994) found that 39% of...

OBJECTIVE To educate athletic trainers and others about the dangers of lightning, provide lightning-safety guidelines, define safe structures and locations, and advocate prehospital care for lightning-strike victims. BACKGROUND Lightning may be the most frequently encountered severe-storm hazard endangering physically active people each year. Millions of lightning flashes strike the ground an...

Using FORTE photodiode detector (PDD) observations of lightning, we have determined the geographic distribution of nighttime flash rate density. We estimate the PDD flash detection efficiency to be 62% for total lightning through comparison to lightning observations by the TRMM satellite’s Lightning Imaging Sensor (LIS), using cases in which FORTE and TRMM viewed the same storm. We present here...

[1] Seasonal variations on lightning activity of precipitation systems over south China and Taiwan before and after the onset of Mei‐Yu have been observed by the lightning imager sensor (LIS) on board the Tropical Rainfall Measuring Mission (TRMM) satellite. Lightning storms before Mei‐Yu onset show higher probability of lightning, higher flash rate, and larger radar reflectivity in the mixed‐p...

A new method to calculate lightning fatality risk is presented in order to develop a way to identify the lightning risk in areas where lightning fatality data are not available. This new method uses GIS software to multiply lightning flash density and population density on a grid and display the results on a map. A comparison to the known lightning fatality data was done to verify the method. T...