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Rotor wing

H Li, S Guo
This study investigates the aerodynamic efficiency of a bioinspired flapping wing rotor kinematics which combines an active vertical flapping motion and a passive horizontal rotation induced by aerodynamic thrust. The aerodynamic efficiencies for producing both vertical lift and horizontal thrust of the wing are obtained using a quasi-steady aerodynamic model and two-dimensional (2D) CFD analysis at Reynolds number of 2500. The calculated efficiency data show that both efficiencies (propulsive efficiency- η p , and efficiency for producing lift- Pf ) of the wing are optimized at Strouhal number ( St ) between 0...
March 2018: Royal Society Open Science
Chen Rao, Teruaki Ikeda, Toshiyuki Nakata, Hao Liu
Owls are widely known for silent flight, achieving remarkably low noise gliding and flapping flights owing to their unique wing morphologies, which are normally characterized by leading-edge serrations, trailing-edge fringes and velvet-like surfaces. How these morphological features affect aerodynamic force production and sound suppression or noise reduction, however, is still not well known. Here we address an integrated study of owl-inspired single feather wing models with and without leading-edge serrations by combining large-eddy simulations (LES) with particle-image velocimetry (PIV) and force measurements in a low-speed wind tunnel...
July 4, 2017: Bioinspiration & Biomimetics
Nicholas H Carter, Clint Leonard, Lisa Rae
The objectives of this study were to identify trends in preburn center care, assess needs for outreach and education efforts, and evaluate resource utilization with regard to referral criteria. We hypothesized that many transferred patients were discharged home after brief hospitalizations and without need for operation. Retrospective chart review was performed for all adult and pediatric transfers to our regional burn center from July 2012 to July 2014. Details of initial management including TBSA estimation, fluid resuscitation, and intubation status were recorded...
February 20, 2018: Journal of Burn Care & Research: Official Publication of the American Burn Association
Nicole Powell-Dunford, Alaistair Bushby, Richard A Leland
BACKGROUND: This study is intended to identify efficacy, evolving applications, best practices, and challenges of spatial disorientation (SD) training in flight simulators for rotor wing pilots. METHODS: Queries of a UK Ministry of Defense research database and Pub Med were undertaken using the search terms 'spatial disorientation,' 'rotor wing,' and 'flight simulator.' Efficacy, evolving applications, best practices, and challenges of SD simulation for rotor wing pilots were also ascertained through discussion with subject matter experts and industrial partners...
2016: Aerospace Medicine and Human Performance
Kun Cai, Jingzhou Yu, Lingnan Liu, Jiao Shi, Qing H Qin
Due to the extremely small dimensions and super high frequency of the rotor in a thermally driven rotary nanomotor made from carbon nanostructures, measuring the rotational frequency of the nanomotor is still an open issue. To this end, a measuring system is constructed in which a spring wing is connected with the rotor to provide collisions with a probe tip whose deflection reflects the rotational frequency of the rotor. The spring wing is formed by connecting an end-tube from a carbon nanotube and a graphene with differently hydrogenated surfaces...
August 10, 2016: Physical Chemistry Chemical Physics: PCCP
Alyssa Karl, Tiffany Pham, Jeff D Yanosky, Jeffrey Lubin
STUDY OBJECTIVE: Some helicopter emergency medical services (HEMS) maintain an independent supply of blood for use during transport, although practice is variable and not well described. We aimed to characterize the blood-carrying practices by HEMS programs across the United States. METHODS: Online surveys were sent to the leadership of the 261 HEMS programs nationwide listed in the 2011 Atlas and Database of Air Medical Services (ADAMS) database. We examined blood-carrying practices in aggregate, including typical transport time, proportion of scene transports, and local population density...
November 2016: Prehospital Emergency Care
Celeste M Alfes, Amanda S Rowe
The Dorothy Ebersbach Academic Center for Flight Nursing in Cleveland, OH, holds an annual flight camp designed for master's degree nursing students in the acute care nurse practitioner program, subspecializing in flight nursing at the Frances Payne Bolton School of Nursing at Case Western Reserve University. The weeklong interprofessional training is also open to any health care provider working in an acute care setting and focuses on critical care updates, trauma, and emergency care within the critical care transport environment...
March 2016: Air Medical Journal
Susan R Wilcox, Mark S Saia, Heather Waden, Susan J McGahn, Michael Frakes, Suzanne K Wedel, Jeremy B Richards
UNLABELLED: Introduction Inter-facility transport of critically ill patients is associated with a high risk of adverse events, and critical care transport (CCT) teams may spend considerable time at sending institutions preparing patients for transport. The effect of mode of transport and distance to be traveled on on-scene times (OSTs) has not been well-described. Problem Quantification of the time required to package patients and complete CCTs based on mode of transport and distance between facilities is important for hospitals and CCT teams to allocate resources effectively...
June 2016: Prehospital and Disaster Medicine
Ian M Buchanan, Angela Coates, Niv Sne
OBJECTIVES: Evidence-based guidelines regarding the optimal mode of transport for trauma patients from scene to trauma centre are lacking. The purpose of this study was to investigate the relationship between trauma patient outcomes and mode of transport at a single Ontario Level I Trauma Centre, and specifically to investigate if the mode of transport confers a mortality benefit. METHODS: A historical, observational cohort study was undertaken to compare rotor-wing and ground transported patients...
September 2016: CJEM
Miguel Alvarado, Felipe Gonzalez, Andrew Fletcher, Ashray Doshi
Blasting is an integral part of large-scale open cut mining that often occurs in close proximity to population centers and often results in the emission of particulate material and gases potentially hazardous to health. Current air quality monitoring methods rely on limited numbers of fixed sampling locations to validate a complex fluid environment and collect sufficient data to confirm model effectiveness. This paper describes the development of a methodology to address the need of a more precise approach that is capable of characterizing blasting plumes in near-real time...
2015: Sensors
Eileen Frazer
No abstract text is available yet for this article.
July 2015: Air Medical Journal
Piero Boccardo, Filiberto Chiabrando, Furio Dutto, Fabio Giulio Tonolo, Andrea Lingua
Exploiting the decrease of costs related to UAV technology, the humanitarian community started piloting the use of similar systems in humanitarian crises several years ago in different application fields, i.e., disaster mapping and information gathering, community capacity building, logistics and even transportation of goods. Part of the author's group, composed of researchers in the field of applied geomatics, has been piloting the use of UAVs since 2006, with a specific focus on disaster management application...
2015: Sensors
John M Zietlow, Scott P Zietlow, David S Morris, Kathleen S Berns, Donald H Jenkins
BACKGROUND: While the military use of tourniquets and hemostatic gauze is well established, few data exist regarding civilian emergency medical services (EMS) systems experience. METHODS: A retrospective review was performed of consecutive patients with prehospital tourniquet and hemostatic gauze application in a single ground and rotor-wing rural medical transport service. Standard EMS registry data were reviewed for each case. RESULTS: During the study period, which included 203,301 Gold Cross Ambulance and 8,987 Mayo One Transport records, 125 patients were treated with tourniquets and/or hemostatic gauze in the prehospital setting...
2015: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
Erik Zakariassen, Oddvar Uleberg, Jo Røislien
OBJECTIVE: The main objective of the Norwegian air ambulance service is to provide advanced emergency medicine to critically ill or severely injured patients. The government has defined a time frame of 45 minutes as the goal within which 90% of the population should be reached. The aims of this study were to document accurate flying times for rotor wing units to the scene and to determine the rates of acute primary missions in Norway. METHODS: We analyzed operational data from every acute primary mission from all air ambulance bases in Norway in 2011, focusing on the flying time taken to reach scene, the municipality requesting the flight, and the severity score data...
March 2015: Air Medical Journal
Don Hayes, Thomas J Preston, Mark Galantowicz, Joseph D Tobias, Corinne R Long, Gil Peri
INTRODUCTION: There are a limited number of pediatric lung transplant programs in the United States; therefore, geographical barriers limit critically ill children who may be good candidates for lung transplantation. MATERIALS AND METHODS: With advancements in technology, extracorporeal membrane oxygenation (ECMO) is becoming an option to bridge children requiring advanced life support to lung transplantation and offers the opportunity to transport critically ill children to pediatric lung transplant centers...
January 2015: Air Medical Journal
Jan W Kruyt, Elsa M Quicazán-Rubio, GertJan F van Heijst, Douglas L Altshuler, David Lentink
Hummingbirds are the only birds that can sustain hovering. This unique flight behaviour comes, however, at high energetic cost. Based on helicopter and aeroplane design theory, we expect that hummingbird wing aspect ratio (AR), which ranges from about 3.0 to 4.5, determines aerodynamic efficacy. Previous quasi-steady experiments with a wing spinner set-up provide no support for this prediction. To test this more carefully, we compare the quasi-steady hover performance of 26 wings, from 12 hummingbird taxa. We spun the wings at angular velocities and angles of attack that are representative for every species and measured lift and torque more precisely...
October 6, 2014: Journal of the Royal Society, Interface
Darren Braude, Dominic Tutera, Issac Tawil, Gregory Pirkl
OBJECTIVE: It is conventionally thought that patients with pneumothorax (PTX) require tube thoracostomy (TT) before air medical transport (AMT), especially in unpressurized rotor-wing (RW) aircraft, to prevent deterioration from expansion of the PTX or development of tension PTX. We hypothesize that patients with PTX transported without TT tolerate RW AMT without serious deterioration, as defined by hypotension, hypoxemia, respiratory distress, intubation, bag valve mask ventilation, needle thoracostomy (NT), or cardiac arrest during transport...
July 2014: Air Medical Journal
Helge Brändström, Ola Winsö, Lars Lindholm, Michael Haney
BACKGROUND: There are three different types of ambulance systems, all of which can manage the same secondary intensive care patient transport mission: road ambulance, rotor-wing ambulance, and fixed-wing ambulance. We hypothesized that costs for specific transport distances would differ between systems. We aimed to analyze distances and observed times for ambulance intensive care secondary transport missions together with system costs to assess this. METHODS: We prospectively collected data for consecutive urgent intensive care transports into the regional tertiary care hospital in the northern region of Sweden...
2014: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
Michael J Greene
In this second half of a 2-part series, chief/lead pilots were invited to complete a 40-question survey modeled on the AirMed 2000 Helicopter Avionics and Operations Survey via an online survey. The survey was available to rotor-wing (RW) and fixed-wing air medical transport services in the United States, although year 2000 comparative data are RW only. Topics surveyed include flight hours, aircraft models, avionics, interiors, staffing, weather minimums, and maintenance facilities.
November 2013: Air Medical Journal
Jeanna Buldyreva, Leila Daneshvar
The non-Markovian Energy-Corrected Sudden approach [J. Buldyreva and L. Bonamy, Phys. Rev. A 60, 370 (1999)] previously developed for wide-band rototranslational Raman spectra of linear rotors is extended to the case of infrared absorption by linear molecules with stretching and bending modes. Basic relations such as detailed balance and double-sided sum rules for the rotational relaxation matrix are easily satisfied owing to the specific choice of a symmetric metric in the Liouville space. A single set of model parameters deduced from experimental widths of isolated isotropic Raman lines enables calculations of line-shape characteristics and full spectra up to the far wings...
October 28, 2013: Journal of Chemical Physics
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