This paper examines the reorganization of freight transportation in the city of Venice, Italy. Most of the freight arrives from the mainland by trucks, but must be carried to the final customers by boats, through a network of small canals. The existence of constraints, related to the widths and clearances of the canals, makes it necessary to use boats of different sizes and capacities. In this ...

This paper investigates the extraction of acoustic signatures from small boats using a passive sonar system. Noise radiated from a small boats consists of broadband noise and harmonically related tones that correspond to engine and propeller specifications. A signal processing method to automatically extract the harmonic structure of noise radiated from small boats is developed. The Harmonic Ex...

The stability of a fishery system was investigated using two forms of a stochastic computer simulation model that was individually based in terms of the fishing boats. Fish catch was partitioned among boats according to two catch processes: an unranked process in which all boats had equal ability to catch fish and a ranked catch model in which a boat’s ability to catch fish depended on its weal...

T he word pioneer conjures many images, especially that of the first to discover something. It implies aloneness, if not loneliness. In research—especially family medicine research—nothing could be further from the truth. Although all of the College of Family Physicians of Canada’s Top 20 Pioneers in Family Medicine Research1 were among the first to discover and achieve things in their areas, n...

Mortality rates continue to decline among post-reproductive individuals. This makes understanding long-term physiological responses to stress increasingly important. Allostatic load (AL) was developed to assess detrimental effects on the soma of responding to multiple stressors over a lifetime. AL arises from developmental experiences, genetic predispositions, environmental, psychosocial, life ...

Whale-watching (WW) is an activity which has been increasing worldwide due to the great interest of tourists and economic benefits it provides local communities. However, reported that this affects behavioral patterns some cetaceans, although for species such as fin whale ( Balaenoptera physalus ) not extensively studied. To identify effects WW on species, we studied its traveling resting behav...

This study was conducted at NASA Ames Research Center as a part of a larger research project assessing the impact of captain's personality on crew performance and perceived stress in 24 air transport crews (5). Three different personality types for captains were classified based on a previous cluster analysis (3). Crews were comprised of three crewmembers: captain, first officer, and second off...