transmission towers have been subjected to alternating loads caused by the galloping of iced conductors for a long time, and their fastening bolts are easy loosen or break, which seriously threatens safe operation lines. Through transverse vibration test M20 commonly used in towers, frequency amplitude changed, change law preload bolt joints is studied. The results show that with increase initi...

Rising wildfire suppression expetizditures on public land in the United States have led to increased scrutiny of wildfifne managemefzt practices. One area that has received particular attention is the Forest Service's increasing reliance on contract fire crews. Because a contract crew rate includes several costs that are not included in the wage costs of a Forest Service crew, it is difsicult t...

Belize maintains the largest proportion of Endangered Antillean manatee Trichechus manatus population in its range, but tourism and boat traffic have increased substantially over past 3 decades. We utilized 25 yr stranding data (1995-2019), 6 aerial surveys (1997, 1999, 2000, 2001, 2002, 2014), 2 decades registration to examine: (1) spatial patterns incidence risk watercraft collision; (2) temp...

Crews working on present-day jet aircraft are a large occupationally exposed group with a relatively high average effective dose from galactic cosmic radiation. Crews of future high-speed commercial flying at higher altitudes would be even more exposed. To help reduce the significant uncertainties in calculations of such exposures, the male adult voxels phantom MAX, developed in the Nuclear Ene...

Several dramatic accidents have emphasized certain deficiencies in cockpit-cabin coordination and communication. There are historical, organizational, environmental, psychosocial, and regulatory factors that have led to misunderstandings, problematic attitudes, and suboptimal interactions between the cockpit and cabin crews. Our research indicates the basic problem is that these two crews repre...

Hydrofoils are a current hot topic in the marine industry both high performance sailing and new passenger transport systems conjunction with electric propulsion. In community, largest impact is seen from America’s cup, where boats sailed at more than 50 knots (over 100 km/h) 100% “flying” time. also becoming popular Olympics, as 2024 Olympic games 5 gold medals will be decided on foiling boats/...