Results 111 to 120 of about 891,158 (301)

Rotorcraft contingency power study [PDF]

Twin helicopter engines are often sized by the power requirement of a safe mission completion after the failure of one of the two engines. This study was undertaken for NASA Lewis by General Electric Co.
Davis, R. H., Goldstein, D. N., Haynes, J. F., Hirschkron, R.   +3 more
core   +1 more source

Unequal access to timely care: Geographic variation in prehospital time among injured patients at risk of hemorrhagic shock

Transfusion, EarlyView.
Abstract Background Hemorrhage remains the leading cause of preventable traumatic deaths, with many fatalities occurring before hospital arrival. Although geographic differences in prehospital time (PHT) are recognized, contemporary national estimates and their implications for resuscitation readiness are not well defined.
Pawan Acharya, Timothy Hurson, Chandler Annesi, Christine Carico, Daniel Lammers, N. Clay Mann, Matthew Levy, Molly P. Jarman, Jeffrey D. Kerby, Jan O. Jansen, John B. Holcomb, Zain G. Hashmi   +11 more
wiley   +1 more source

Ensuring permissible level of gas turbine dynamic loading in operation by means of standard engine control devices

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2019
To solve the fatigue resistance problems of gas turbine engine elements using the existing principles of regulation based on the use of safe load factors for various loading schemes we suggest exercising controlled influence upon the loading sources in ...
V. V. Chervonyuk, B. B. Korovin
doaj   +1 more source

Helicopter cabin noise: Methods of source and path identification and characterization [PDF]

Internal noise sources in a helicopter are considered. These include propulsion machinery, comprising engine and transmission, and turbulent boundary layer effects.
Murray, B. S., Wilby, J. F.
core   +1 more source

Charge control experiments on a CH-53E helicopter in a dusty environment [PDF]

Charge control tests were carried out on a ground based, Marine Corps helicopter to determine if control of the electric fields acting on the engine exhaust gases could be used to reduce the electrification of the helicopter when it operated in a dusty ...
Hunyady, S. J., Jones, J. J., Moore, C. B.   +2 more
core   +1 more source

Using unmanned aerial vehicles (drones) to improve access to blood in low‐ and middle‐income countries: Current challenges and opportunities

Vox Sanguinis, EarlyView.
Abstract Blood transfusion is life‐saving for patients in emergencies, but low‐ and middle‐income countries (LMICs) often face a severe shortage of banked blood. Establishing blood banks in rural areas presents substantial logistical and economic challenges for many LMICs.
Suvro Sankha Datta, Ritwick Mondal, Shramana Deb, Giuseppe Tortora, Angela Pirri   +4 more
wiley   +1 more source

Bearing restoration by grinding [PDF]

A joint program was undertaken by the NASA Lewis Research Center and the Army Aviation Systems Command to restore by grinding those rolling-element bearings which are currently being discarded at aircraft engine and transmission overhaul.
Bull, H. L., Chen, S. M., Hanau, H., Parker, R. J., Zaretsky, E. V.   +4 more
core   +1 more source

PC-based aviation training devices (PCATDs): research, development and certification [PDF]

, 2011
This paper examines the development of two PCATD’s (one helicopter, one fixed-wing) and their eventual certification by CAA. Certification has demonstrated the potential these devices have for aviation training in New Zealand.
Gilbey, Andrew, Hall, S, Jeffreys, L, Reweti, Savern   +3 more
core  

Alloparenting the investment child: A reply to responses

The British Journal of Sociology, EarlyView.
Nina Bandelj
wiley   +1 more source

Fossil Hegemony and Capitalist Realism in Tropic of Orange

Future Humanities, Volume 4, Issue 1, May 2026.
ABSTRACT This article examines Karen Tei Yamashita's Tropic of Orange (1997) through the lens of Mark Fisher's influential concept ‘capitalist realism’. Scholars of petrofiction have pointed to a political ambivalence in the representation of fossil fuels, where a better understanding of fossil capital can overwhelm as much as galvanize.
Claire Ravenscroft
wiley   +1 more source