Relevant bibliographies by topics / Aerial lifts

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Aerial lifts'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Aerial lifts"

1

Rasnic, Russ, Edward L. Beard, and Steven Wehmeyer. "The Evolution and Testing of Aerial Lift Anti-Entrapment Safety Devices." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 63, no. 1 (November 2019): NP1—NP5. http://dx.doi.org/10.1177/1071181319631223.

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First introduced in the 1950’s [2], aerial lifts, also known as cherry pickers, aerial work platforms, and boom lifts, have enabled workers to perform tasks at elevated heights much easier. In many applications with overhead obstructions however, these lifts also present a severe risk to the users, often including fatality. The user can become entrapped due to unintentional involvement with overhead obstacles and be crushed between the lift and the obstacle. In this paper, we present the evolution of the common safety features and anti-entrapment devices that have been developed in response to the growing awareness of the prevalence of these injuries. After these devices are discussed, results are shown for experimental testing of potential crush mechanisms and representative forces. To test the crush force, load cells are attached to a stationary plate in front of a test dummy and forces are recorded to evaluate potential entrapment scenarios. Representative safety device designs are tested, which include mechanical, electrical, and audible features to stop and/or reverse the direction of movement to mitigate or prevent injury. All tests show that having an anti-entrapment device installed drastically reduces the risk to the user and likely prevents fatalities.
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Mastalerz, Andrzej, Paulina Szyszka, Weronika Grantham, and Jerzy Sadowski. "Biomechanical Analysis of Successful and Unsuccessful Snatch Lifts in Elite Female Weightlifters." Journal of Human Kinetics 68, no. 1 (August 21, 2019): 69–79. http://dx.doi.org/10.2478/hukin-2019-0057.

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AbstractThe aim of this study was to identify biomechanical factors affecting successful and unsuccessful snatch attempts in elite female weightlifters during the 2013 World Weightlifting Championships. Fourteen female competitors took part in this study. Their successful and unsuccessful snatch lifts with the same load were recorded with 2 camcorders (50 Hz), and selected points were digitized manually on to the body and the barbell using the Ariel Performance Analysis System. The kinetic and kinematic barbell movement as well as the athlete’s body movement variables during the liftoff phase were examined. The results of this study show statistical differences (p ≤ 0.05) between successful and unsuccessful attempts in relation to the angle values in the knee and hip joints in preparation for the aerial phase position. Similarly, the center of gravity velocity was significantly higher in successful attempts during the catch phase. Thus, coaches should pay particular attention to the accuracy of the execution in preparation for the aerial phase position and to the velocity of the center of gravity of the competitors during the catch phase.
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Nourai, A., and N. Kolcio. "Electrical testing of insulated aerial lifts for contamination using capacitive current compensation technique." IEEE Transactions on Power Delivery 5, no. 2 (April 1990): 1054–61. http://dx.doi.org/10.1109/61.53121.

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Rodriguez-Castaño, Angel, Saeed Rafee Nekoo, Honorio Romero, Rafael Salmoral, José Ángel Acosta, and Anibal Ollero. "Installation of Clip-Type Bird Flight Diverters on High-Voltage Power Lines with Aerial Manipulation Robot: Prototype and Testbed Experimentation." Applied Sciences 11, no. 16 (August 12, 2021): 7427. http://dx.doi.org/10.3390/app11167427.

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This work presents the application of an aerial manipulation robot for the semi-autonomous installation of clip-type bird flight diverters on overhead power line cables. A custom-made prototype is designed, developed, and experimentally validated. The proposed solution aims to reduce the cost and risk of current procedures carried out by human operators deployed on suspended carts, lifts, or manned helicopters. The system consists of an unmanned aerial vehicle (UAV) equipped with a custom-made tool. This tool allows the high force required for the diverter installation to be generated; however, it is isolated from the aerial robot through a passive joint. Thus, the aerial robot stability is not compromised during the installation. This paper thoroughly describes the designed prototype and the control system for semi-autonomous operation. Flight experiments conducted in an illustrative scenario validate the performance of the system; the tests were carried out in an indoor testbed using a power line cable mock-up.
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Shahid, Farzeen, Jingshan Zhao, and Pascal Godefroit. "Aerodynamics from Cursorial Running to Aerial Gliding for Avian Flight Evolution." Applied Sciences 9, no. 4 (February 14, 2019): 649. http://dx.doi.org/10.3390/app9040649.

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Among the different models that have been proposed to explain the origin of avian flightfrom terrestrial predators, the cursorial and arboreal hypotheses remain the most discussed.However, the fossil data at hand show that, taken separately, both theories have significantlimitations in explaining the origin of flight in bird lineage. Here, we describe an aerodynamicsprinciple that fills in the gaps between those apparently contradictory models. The upslope wind inmountain areas and strong wind in plains provided the meteorological conditions allowingfeathered paravians to glide. The results suggest that smaller, feathered paravians could be lifted toglide down to trees on mountain slopes or even to glide up to high trees in plain areas when meetinga strong airflow as they were pursuing a prey or escaping from a predator. The development ofmore aerodynamical limb feathers was a key factor for gliding down the trees because of thedependency of the resultant force on the surface area of a paravian’s body. Later in the evolutionprocess, paravians learned to change the orientation of their wings to gain higher lifts. The proposedprinciple and the results obtained in the present research help to better estimate the aerodynamicbehavior of extinct species and will also help to design an efficient and beneficial system for futureflying robots.
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Chan, Keen Ian. "Generalized Aerodynamic Optimization of Hovering Coaxial Rotor Blades." Journal of the American Helicopter Society 64, no. 2 (April 1, 2019): 1–13. http://dx.doi.org/10.4050/jahs.64.022006.

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This paper presents the development and application of a generalized approach to the aerodynamic optimization of hovering coaxial rotors. The generalization lifts the constraints of previous theories and enables dissimilar rotor diameters, dissimilar rotational speeds, and thrust-sharing percentage of the upper and lower rotors of a coaxial pair to be incorporated as design variables. This increased versatility was necessitated by the emergence of electric vertical take-off and landing unmanned aerial vehicles, which feature independently driven rotors and have unique operational requirements. The optimization methodology begins with the derivation of the generalized momentum theory for coaxial rotors, and then extending the formulation to become an optimization technique, which determines optimal combinations of rotor diameters and rotational speeds for a specified thrust-sharing percentage. These results are next used as inputs to determine the optimal dissimilar geometries for the upper and lower rotor blades. The optimization is demonstrated on a multirotor vertical take-off and landing unmanned aerial vehicle with three coaxial pairs of rotors. The results show that a high figure of merit is achieved, and this is a contributing factor in improved hover endurance.
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Lebid, Oleksii G. "Five-mode quasilinear model of nonlinear dynamics of extended system." Environmental safety and natural resources 38, no. 2 (June 30, 2021): 104–20. http://dx.doi.org/10.32347/2411-4049.2021.2.104-120.

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Distributed systems are widely used in practice. These are cosmic ligaments in the near-Earth space with a length of tens of kilometers. They approximate reinforced concrete piles in the soil when calculating the stress-strain state and assessing the technical condition; pipelines both in air and in liquid, underwater towed systems. Known underwater airlift systems of great length for the extraction of minerals (nodules) from the ocean floor with a length of 5-10 km. To solve the problems of the dynamics of such systems in various environments, the well-known mathematical models are not quite correct from the point of view of taking into account the variety of wave processes. It determines the need to build refined wave models. A new quasilinear mathematical model, which describes the nonlinear four-mode dynamics of the distributed system in the spatially inhomogeneous field of mass and surface forces, has been obtained. It is described by a nonlinear system of twelve first-order partial differential equations. For it, the principles of ultimate and hyperbolicity are fulfilled. Together with the boundary and initial conditions, it can be used to describe dynamics and statics of geometrically and physically nonlinear rod elements, piles in the ground, crane equipment ropes, mine lifts, aerial cableways, towed systems in liquid and gas flow, etc. For two-mode spatial reduction of the model, the theorem about correctness of Cauchy problem has been considered. As a result of the calculations, the earlier assumptions about the movement of the cable along its initial configuration were changed as the length of the cable changed. It has been found out that this assumption is only true for the initial transition participant. It is also established that at a given tachogram in the configuration of the towed line, there is a point of inflection, which shifts from top to bottom when lifting it. It can be a factor in the looping, contributing to the breakage of the cable system during towing.
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Rastgoftar, Hossein, and Ella M. Atkins. "Cooperative aerial lift and manipulation (CALM)." Aerospace Science and Technology 82-83 (November 2018): 105–18. http://dx.doi.org/10.1016/j.ast.2018.09.005.

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Wan Mazlina Wan Mohamed, Mohd Azmi Ismail, Muhammad Ridzwan Ramli, Aliff Farhan Mohd Yamin, Koay Mei Hyie, and Hamid Yusoff. "Experimental Study of Rigid and Flexible Tandem Wing for Micro Aerial Vehicle." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 85, no. 2 (August 5, 2021): 33–43. http://dx.doi.org/10.37934/arfmts.85.2.3343.

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Unmanned aerial vehicle is becoming increasingly popular each year. Now, aeronautical researchers are focusing on size minimization of unmanned aerial vehicle, especially drone and micro aerial vehicle. The lift coefficient of micro aerial vehicle has wing dimension of 12 cm and mass of less than 7 g. In the present study, with the aid of 3D printer, polylactic acid material was used to develop the micro aerial vehicle structure for tandem wing arrangement. The materials for rigid wing skin and flexible wing skin were laminating film and latex membrane, respectively. The present work elaborates the lift coefficient profiles on rigid wing skin and flexible wing skin at wing flapping frequency of 11 Hz, three different Reynolds numbers of 14000, 19000 and 24000, and five different angles of attacks between 0° and 50°. According to the results obtained, the lift coefficient decreased as the Reynolds number increased. The lift coefficient increased up to 9 as the angle of attack increased from 0° to 50° at the Reynolds number of 14000 for flexible wing skin. The results also showed that the lift coefficient of flexible wing skin was higher than that of rigid wing skin at the attack angle of10° and below, except for the Reynolds number of 14000.
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M, Abhinay, and Sampath Rao P. "Design and Analysis of an Aerial Scissor Lift." International Journal of Mechanical Engineering 1, no. 5 (May 25, 2014): 1–5. http://dx.doi.org/10.14445/23488360/ijme-v1i5p104.

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Dissertations / Theses on the topic "Aerial lifts"

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Hernandez, Eileen Cynthia. "Dynamic characterization and analysis of aerial lifts." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45944.

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Aerial lifts are used to elevate people and material to high heights. There are many different types of aerial lifts which have vastly different dynamics characteristics. Thus, a new categorization for aerial lifts was created and organizes them by their kinematics. Many accidents occur while using aerial lifts. Hazards of aerial lifts and current solutions to those hazards were reviewed to understand the causes of the accidents. Some major accidents are due to the complex dynamics and flexibility of aerial lifts, such as oscillations and tip-overs. Oscillations of full-size aerial lifts were experimentally tested to determine frequencies in different configurations. Machine-motion induced oscillations of an articulating aerial lift were simulated and analyzed for both non-overcenter and overcenter configurations. Input shaping was used to achieve reduction in machine-motion induced oscillations. Tip-over stability margin was used to simulate and analyze the stability of both non-overcenter and overcenter configurations. The effect of increased platform mass on tip-over stability margin was also analyzed. The results in this thesis are a categorization of aerial lifts including their hazards and methods of reducing those hazards, an experimental verification of the dynamic response of full-size aerial lifts, a fully dynamic tip-over prediction model of double-boom articulating aerial lift by applying flexibility in the joints and realistic velocity profiles, and a detailed study of the dynamics of a double-boom articulating aerial lift.
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Cook, Robert Graham. "Robust control of high altitude long endurance unmanned aerial vehicles using novel lift effectors." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/9998.

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High-Altitude Long-Endurance Unmanned Aerial Vehicles (HALE UAVs) have been the focus for many researchers in the past decades, and are becoming more and more attainable as technology is improving. Recent interest into solar-powered HALE UAVs is leading the way to achieving flight-times which are not limited by a requirement for refuelling, and could continue for months at a time. Such aircraft have huge potential in providing reconnaissance or communications services, and could potentially take on the usual roles of satellites as a much cheaper alternative. One area of HALE UAV design which requires further technological developments is automated control of trajectory, and active alleviation of gusts. The latter concern is of particular interest to this thesis. In this work, a coupled flight dynamics and aeroelastic methodology will be introduced. This approach features a geometrically-exact beam model, which is required to capture the large deformations expected in such flexible aircraft, along with unsteady aerodynamics. The intrinsically nonlinear system is then linearised to provide an approximation to the system dynamics which is more approachable for control synthesis. With a linearisation of the system, robust linear control methods are applied to derive a controller which can reduce the loading onto the system, while simultaneously stabilising it and providing some degree of robustness which can still perform given the unmodelled dynamics that appear in the nonlinear system. This linear control approach will be investigated on two types of HALE UAV with very different dynamic responses to determine how well such control methods deal with nonlinearities, and what the limitations of such an approach may be to apply in real-life. In addition, various novel control effectors will be then considered for gust alleviation of a very flexible aircraft, using the closed-loop control as a method to fairly assess their effectiveness.
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Alberts, Frederik Nicolaas. "Accurate autonomous landing of a fixed-wing unmanned aerial vehicle." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71672.

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Thesis (MScEng)-- Stellenbosch University, 2012.
ENGLISH ABSTRACT: This thesis presents the analysis, design, simulation and practical implementation of a control system to achieve an accurate autonomous landing of a fixed-wing unmanned aerial vehicle in the presence of wind gust atmospheric disturbances. Controllers which incorporate the concept of direct-lift control were designed based on a study of the longitudinal dynamics of the UAV constructed as a testbed. Direct-lift control offers the prospect of an improvement in the precision with which aircraft height and vertical velocity can be controlled by utilising actuators which generate lift directly, instead of the conventional method whereby the moment produced by an actuator results in lift being indirectly generated. Two normal specific acceleration controllers were designed. The first being a conventional moment-based controller, and the second a direct-lift-augmented controller. The moment-based controller makes use of the aircraft’s elevator while the direct-lift augmented controller in addition makes use of the flaps of the aircraft which serve as the direct-lift actuator. Controllers were also designed to regulate the airspeed, altitude, climb rate, and roll angle of the aircraft as well as damp the Dutch roll mode. A guidance controller was implemented to allow for the following of waypoints. A landing procedure and methodology was developed which includes the circuit and landing approach paths and the concept of a glide path offset to calibrate the touchdown point of a landing. All controllers and the landing procedure were tested in a hardware-in-the-loop simulation environment as well as practically in a series of flight tests. Five fully autonomous landings were performed, three of these using the conventional NSA controller, and the final two the direct-lift-augmented NSA controller. The results obtained during the landing flight tests show that the project goal of a landing within five meters along the runway and three meters across the runway was achieved in both normal wind conditions as well as in conditions where wind gusts prevailed. The flight tests also showed that the direct-lift-augmented NSA controller appears to achieve a more accurate landing than the conventional NSA controller, especially in the presence of greater wind disturbances. The direct-lift augmented NSA controller also exhibited less pitch angle rotation during landing.
AFRIKAANSE OPSOMMING: Hierdie tesis verteenwoordig die analise, ontwerp, simulasie en praktiese implementering van ’n beheerstelsel wat ten doel het om ’n akkurate en outonome landing van ’n onbemande vastevlerk vliegtuig in rukwind atmosferiese toestande te bewerkstellig. Gegrond op ’n studie van die longitudinale dinamika van die vliegtuig wat as proeftuig gebruik is, is beheerders ontwerp wat die beginsel van direkte-lig insluit. Direkte-lig beheer hou die potensiaal in om die vliegtuig se hoogte en vertikale snelheid akkuraat te beheer deur gebruik te maak van aktueerders wat lig direk genereer in teenstelling met die konvensionele metode waar die moment van die aktueerder indirek lig genereer. Twee normaal-versnellings beheerders is ontwerp. Die eerste is ’n konvensionele moment-gebaseerde beheerder wat gebruik maak van die hys-aktueerder van die vliegtuig, en die tweede is ’n direkte-lig-bygestaande beheerder wat addisioneel gebruik maak van die flappe van die vliegtuig wat as die direkte-lig aktueerder dien. Vedere beheerders is ontwerp wat die lugspoed, hoogte, klimkoers, en rolhoek van die vliegtuig reguleer asook die “Dutch roll” gedrag afklam. ’n Leiding-beheerder wat die volg van vliegbakens hanteer, is ingestel. Die landingsprosedure en -metodologie is ontwikkel wat die landingspad sowel as die sweef-pad bepaal en wat terselfdertyd ’n metode daarstel om die posisie van die landingspunt te kalibreer. Die beheerders en landingsprosedure is in ’n hardeware-in-die-lus omgewing gesimuleer en deur middel van ’n reeks proefvlugte getoets. Vyf ten volle outonome landings is uitgevoer waarvan drie van die konvensionele normaal-versnellings beheerder gebruik gemaak het, en die laaste twee die direkte-lig-bygestaande normaal-versnellings beheerder. Die vlugtoetsuitslae bevestig dat die navorsingsdoel om ’n landing binne vyf meter in lyn met en drie meter dwarsoor die landingstrook te bewerkstellig, behaal is. Hierdie akkuraatheid is verkry in beide goeie atmosferiese toestande sowel as toestande met rukwinde. Volgens die vlugtoetse blyk dit dat die direkte-lig-bygestaande normaalversnellings beheerder ’n meer akkurate landing kan bewerkstellig as die konvensionele normaal-versnellings beheerder, veral dan in toestande met rukwinde. Die direkte-ligbygestaande normaal-versnellings beheerder het ook ’n laer hei-hoek rotasie tydens die landing vertoon.
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O'Brien, Patrick Charles. "Challenges and methodology in the design of a vertical lift aerial vehicle for use on the planet Mars." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/12017.

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Moses, Kenneth C. "Biomimicry of the Hawk Moth, Manduca sexta (L.): Forewing and Thorax Emulation for Flapping-Wing Micro Aerial Vehicle Development." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case158687503705972.

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Cheng, Shih-Chou, and 程士洲. "Fabrication and Lift Measurement of Flapping Micro Aerial Vehicle." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/22471736051325493375.

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碩士
國立成功大學
航空太空工程學系碩博士班
97
Based upon the commercial flapping-wing aircraft toy, the purpose of this research is to fabricate remote control flapping-wing aircraft through purchasing several electronic components with specific functions from model shop and construct the flapping-wing aircraft body by myself. Furthermore, we reduce the body size and weight of the flapping-wing aircraft and try to use different four-bar linkage mechanisms to observe the effects of these parameters on flying performance. This research finishes four flapping-wing aircraft whose wing span vary from 42cm to 17cm and weight vary from 25.9gw to 9gw. After flying test, we find that the flight time of one flapping-wing aircraft using four-bar linkage mechanism of delfly exceeds 14min and the delfly mechanism can improve the efficiency of strength transmits and the performance of flapping-wing aircraft. This research also probes into the variations of lift and thrust under different angles of attack and wind speeds through a simple wing tunnel experiment for understanding the influence of these factors on flying quality. According to the experience data and actual flying situation, we can see that the flapping-wing aircraft need to keep lift with little angle of attack (AOA) of body, whereas both the extremely large and small AOA of body will increase the load exerted on motor.
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Ciou, Fong-Jhen, and 邱豐真. "The Study of Network and Institution in Local Governance Mechanism:The Case of Betiou Line Aerial Gondola Lift ProjectThe Study of Network and Institution in Local Governance Mechanism:The Case of Betiou Line Aerial Gondola Lift Project." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/38713680919646618303.

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碩士
國立臺北大學
公共行政暨政策學系
95
Recently, researchers who discussed the local public policy generally focused on “from local government to local governance”. That is, the process of local public policies within the local governance mechanism has to combine multi-actors to interact with each others and to connect to the institution for modeling policy outcomes. Therefore, this article attempts to take two points of view, which are network and institution, with the case study in Betiou Line Aerial Gondola Lift Project to illuminate the processing of the local governance mechanism. Above all, the text concluded the local governance mechanism as a reformation strategy on the base of the public administration's local governance theory and the experience of Britain. The content is about the good governance of a trend of decentralization and local democratic development. Furthermore, the content figured out three proposition by network and institution. The case study result revealed that the local governance mechanism was controlled by the government system. And the network just influenced indirectly. Thus, it pointed out the decision making processes of the local governance machine were still centralized on the local government's operation, not on the totally diffuse network.
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Ho, Jen-Yang, and 何仁揚. "The Fabrication of the Flapping Micro Aerial Vehicle and Its On-site Measurement of Unsteady Lift." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/01536051525719425850.

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碩士
淡江大學
機械與機電工程學系碩士班
93
The research of micro aerial vehicles (MAVs) is a new field, which attracts much attention in the advanced aeronautical area. The flapping wing, proved by many natural flyers, is the most appropriate way of flying objects with size less than 6 inches. However, there is still plenty of room for studying on the unsteady aerodynamic characteristics of flapping wings. The flapping wing, which is light weighted and high strengthened, is composed of a titanium-alloy frame and a parylene skin in this study. Such an integration of fabrication needs the help of MEMS processing. In the wind-tunnel experimental, the signals from a load cell in the wind-tunnel and the PVDF sensors embedded in parylene wings are acquired simultaneously. Both of the lift signals from the PVDF and the load-cell are basically identical with the same flapping frequency and with the similar qualitative behaviors. Finally we integrate Li-battery into our MAV system and perform test fly of the MAV prototype. The longest distance which our MAV system can reach is 10~15m so far.
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Peng, Ching-Kai, and 彭敬凱. "Development of a High-Lift Propulsive Airfoil with Integrated Cross-Flow Fan for Unmanned Aerial Vehicle." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/85b3cy.

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碩士
國立臺北科技大學
冷凍空調工程系所
105
The demands of an efficient high-lift device have been one of major driving forces in aerodynamic research for many years. The fan-wing was described as a simple, stable, quiet, short takeoff and landing, no stall at large angle of attack, stability in flight and very efficient high-lift device. Having these advantage, it recently becomes a hotspot in unmanned aerial vehic1e and exhibits great potential for exploitation a wider range of application for either military or civilian purpose. Foreign research in this area has been for years, but there are few domestic research literature published today. To catch up, it is worthy for people to participate in research and promotion. Therefore, the purpose of this program is to develop an innovative unmanned aerial vehicle with cross-flow fan propulsive wings. The numerical simulation and experimental measurement are used to analyze the effects of different flight conditions on the distribution characteristics of streamline, the static pressure, the lift and drag forces along surfaces of thrust wing and the actual aerodynamic performance (e.g. flying takeoff and landing, flight attitude, flight in high angle of attack, monitoring system, etc.), propulsion efficiency and so on. The research results can be used as a reference for future commercialization. The results show that (1) an wireless remote control UAV using the cross-flow fan wing as thrust system is completed and verified that it can fly; (2) the maximum thrust created by this CFF-UAV reach 9.1kgf and the shortest distance for taking off/landing is 10m; (3) when the speed reach 6000rpm, the average wind speed generated by the outlet reach 18.65m/s.
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Chen, Tzu-Yen, and 陳子硯. "Study on the Effect of Changeable Rotation Angle to Lift and Drag Force for Flapping Wing Aerial Robots." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/40113213331566375347.

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碩士
國立中央大學
電機工程學系
101
In the real application, flapping aerial robots can be used in investigation, rescue, military and entertainment. They have some special advantages and characteristics such as light weight, low noise, energy saving, and quick action. In design of this kind of robots, there are many parameters such as Mach number, angle of attack, rotation angle, lift coefficient, and drag coefficient to influence lift and drag force. We use LEGO Mindstorms and some related parts and accessories to realize our mechanism. There are two types of transmission and rotation mechanism. We use graphical software NXT 2.1 which is developed by LEGO to program and control our mechanism. In brief summary of mechanism design, we compare pros and cons of two types of transmission and rotation mechanism. This research focuses on that rotation angle affecting the lift and drag force in the whole system. Especially, it aims on static analysis of rotation angle, so we choose fixed wing simulator to simulate and predict the real situations. This simulator is called VLAERO+ which is an aerodynamic analysis tool developed by Stark Aerospace company. In this assumption, we found that changing rotation angle can control magnitude of lift and drag force. But, we can only change one side of two wings. On future work, we can use existing research data to realize automation flapping aerial robot.
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Books on the topic "Aerial lifts"

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Association, National Ski Access. American national standard for passenger ropeways: Aerial tramways, aerial lifts, surface lifts, tows and conveyors-- safety requirements. New York: American National Standards Institute, 1999.

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Edwards, Harry W. Waste minimization assessment for a manufacturer of aerial lifts. Cincinnati, OH: U.S. Environmental Protection Agency, Rsearch and Development, Risk Reduction Engineering Laboratory, 1994.

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Edwards, Harry W. Waste minimization assessment for a manufacturer of aerial lifts. Cincinnati, OH: U.S. Environmental Protection Agency, Rsearch and Development, Risk Reduction Engineering Laboratory, 1994.

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Koleje linowe i wyciągi narciarskie w Polsce: Historia i dzień dzisiejszy. Łódź: "Księży Młyn" Dom Wydawniczy, 2010.

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Colorado. Dept. of Regulatory Agencies. Office of Policy, Research, and Regulatory Reform. Passenger Tramway Safety Board: 2007 sunset review. Denver, Colo.]: Colorado Dept. of Regulatory Agencies, Office of Policy, Research, and Regulatory Reform, 2007.

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Colorado, Dept of Regulatory Agencies Office of Policy Research and Regulatory Reform. Passenger Tramway Safety Board: 2007 sunset review. [Denver, Colo.]: Colorado Dept. of Regulatory Agencies, Office of Policy, Research, and Regulatory Reform, 2007.

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Colorado. Dept. of Regulatory Agencies. Office of Policy and Research. Colorado Passenger Tramway Safety Board: 2000 sunset review. [Denver, Colo.] (1560 Broadway, Suite 1550, Denver 80202): Colorado Department of Regulatory Agencies, Office of Policy and Research, 2000.

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Colorado. Dept. of Regulatory Agencies. 1992 sunset review of the Passenger Tramway Safety Board. [Denver, Colo.]: The Department, 1992.

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Unsteady potential flow past a propeller blade section. Washington, D.C: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1990.

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Book chapters on the topic "Aerial lifts"

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Pan, Christopher S. "Chapter 16 Aerial Lift Safety Research and Practice." In Human Factors and Ergonomics, 271–90. Taylor & Francis, Broken Sound Parkway, NW, Suite 300, Boca Raton, FL 33487: CRC Press, 2016. http://dx.doi.org/10.1201/9781315373744-17.

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Hudson, Dr Simon, and Louise Hudson. "Management and Operations." In Winter Sport Tourism. Goodfellow Publishers, 2015. http://dx.doi.org/10.23912/978-1-910158-39-5-2760.

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The network of lifts at a ski resort can be arranged in several patterns depending on the size and topography of the area. A common pattern is where several lifts run outwardly from a common base area to top stations along surrounding peaks and ridges. Lifts might also run inwardly from several base stations to a common summit area. Ski areas located along the face of a long ridge may simply have numerous lifts running roughly parallel, and high-traffic areas may have two or more lifts in parallel for increased capacity. A small percentage of ski areas have lifts which cross one another, usually with an aerial lift crossing above a surface lift, and some have lifts connecting two mountains; the PEAK 2 PEAK Gondola connecting Whistler and Blackomb mountains is a good example of such a lift. Needless to say, operating ski lifts is an important element of ski area opera- tions. In the U.S. alone, there are approximately 3,500 lifts, the vast majority being traditional double, triple and quad chair lifts (both fixed and detachable), as well as gondolas, surface lifts, rope tows and aerial tramways. Ski areas tend to adhere to rigorous and exacting inspections procedures for their lifts, and they tend to have an excellent safety record (NSAA, 2012). Ski area employees conduct their own individual inspection to their lifts on a daily, weekly, monthly, and annual basis. This maintenance regime is conducted pursuant to state agencies, lift manufacturer requirements, federal regulations, national safety standards and other inspection entities. It is not unusual for a ski area to close a lift due to adverse weather conditions and the decision to close lifts is usually determined by a select group of ski area managers, which may include the general manager, ski patrol director, the risk manager, and/or the manager of the lifts department.
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"Scaffolds and Aerial Lift Illustration." In Handbook of OSHA Construction Safety and Health, Second Edition, 881–917. CRC Press, 2006. http://dx.doi.org/10.1201/9781420006230.axm.

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Kotarski, Denis, Petar Piljek, and Josip Kasać. "Design Considerations for Autonomous Cargo Transportation Multirotor UAVs." In Self-driving Vehicles and Enabling Technologies [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.95060.

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Unmanned aerial vehicles (UAVs) have proven to be an advanced tool for a variety of applications in the civilian and military sectors. Different categories of UAVs are used in various missions and are also the subject of numerous researches. Due to their characteristics and potential in specific conditions, multirotor UAVs imposes itself as a solution for many tasks, including transport. This chapter presents a conceptual solution of autonomous cargo transportation where the primary research objective is the design of a heavy lift multirotor UAV system. The process of designing a multirotor UAV that can carry heavy lift cargo is quite challenging due to many parameters and constraints. Five selected series of electric propulsion systems are analyzed, with different multirotor configurations, and results are graphically displayed for payloads from 10 kg up to 100 kg.
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Beard, Jack. "The Principle of Proportionality in an Era of High Technology." In Complex Battlespaces, 261–88. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190915360.003.0009.

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This chapter explores the application of a key principle of the law of armed conflict—proportionality—in the context of new and emerging weapons systems and methods of warfare. The relentless pursuit of new military technologies by States continues to yield expanding lists of technology-related issues for lawyers to consider in applying the law of armed conflict in complex battlespaces on land, on sea, in air, in space, and in cyberspace. Foremost among these issues is the challenge presented by the principle of proportionality, requiring military forces to refrain from causing excessive damage to civilians and civilian objects when attacking military objectives. New weapons systems in complex battlespaces continue to increasingly force lawyers and decision makers to revisit, re-evaluate, and struggle in new contexts with the “equitable balance between humanitarian requirements and the sad necessities of war.” Some technological developments may, however, also present opportunities for the principle of proportionality to achieve greater relevance to the conduct of armed conflicts and even contribute to improved compliance by States. To illustrate these challenges and opportunities, this chapter examines the application of the principle of proportionality in modern armed conflicts with respect to several critical yet still evolving military technologies: unmanned aerial vehicles, autonomous weapons systems, cyber capabilities, and outer space technologies.
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Conference papers on the topic "Aerial lifts"

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Hiraki, Koju, and Kazuki Fujii. "Lift-Force Measurement for Hovering Flight of Four-Winged Flapping Micro Aerial Vehicle." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-15029.

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In order to establish the measurement technique of the hovering force of a flapping aerial vehicle the indirect method was proposed. In the indirect measurement the flapping vehicle was placed over a horizontal plate with a certain distance, and the force acting on the plate was measured by the loadcell installed beneath the plate. First, this technique was evaluated by the thrust force measurement of a rotating propeller. The indirectly measured force was compared with that of the direct measurement. The averaged values of the two measurements agreed quite well. It is also proved that the standard deviation of the indirect measurement was only 7.6 percent of that of the direct measurement. The measured force was insensitive to the vertical position of the plate below the propeller. When the propeller was inclined toward the horizontal plate, the measured values coincided nearly to the normal component of the force vector. This indirect technique was applied to the flapping aerial vehicle. The standard deviation of the indirect measurement was 10 percent of that of the direct measurement. The highest hovering force was obtained at 80 degrees in attitude angle, which is nearly vertical nose-up attitude. This fact corresponded to that the air stream generated by the flapping motion was at maximum in the direction of 80 degrees. The obtained hovering force was 0.126 N, and this value is quite close to the gravitational force acting on the flapping aerial vehicle, which was 0.131 N.
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Balampanis, Fotios, A. Pedro Aguiar, Ivan Maza, and Anibal Ollero. "Path tracking for waypoint lists based on a pure pursuit method for fixed wing UAS." In 2017 Workshop on Research, Education and Development of Unmanned Aerial Systems (RED-UAS). IEEE, 2017. http://dx.doi.org/10.1109/red-uas.2017.8101643.

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Predachenko, Konstantin, and Oleg Lemko. "The Elevator Parameters Study of Joined Wing Configuration in term of Lift-to-Drag Ratio Losses." In 2019 IEEE 5th International Conference Actual Problems of Unmanned Aerial Vehicles Developments (APUAVD). IEEE, 2019. http://dx.doi.org/10.1109/apuavd47061.2019.8943824.

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Bozkurt, A., A. Lal, and R. Gilmour. "Aerial and terrestrial locomotion control of lift assisted insect biobots." In 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2009. http://dx.doi.org/10.1109/iembs.2009.5334433.

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Predachenko, Konstantin, and Oleg Lemko. "Lift-to-drag ratio losses due to longitudinal trimming in joined wing configuration at cruise flight mode." In 2017 IEEE 4th International Conference Actual Problems of Unmanned Aerial Vehicles Developments (APUAVD). IEEE, 2017. http://dx.doi.org/10.1109/apuavd.2017.8308773.

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Mayeed, Mohammed S., and Gabriel Darveau. "Designing an Unmanned Aerial Vehicle for Specific Aerial Applications of Insecticides and Herbicides." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65936.

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In this study a gasoline powered hexa-copter unmanned aerial vehicle (UAV) has been designed as a solution to farmers’ need for a low cost, easy to maintain, long flight duration, and multi-purpose means of specific aerial applications for insecticides and herbicides. Application of herbicides and pesticides by airplane is an example of how farmers have used technology to improve their bottom line and overall quality of life. Fields can now be sprayed in under an hour instead of consuming an entire day. However, if a producer has noxious weeds in only a small area, fixed-wing aerial application cannot be used as it is only accurate enough to do an entire field. Currently there is no solution for small scale, accurate, aerial herbicide application to meet this need. The currently available Yamaha Rmax UAV costs a tremendous amount of money and also requires a lot of money to maintain. Though it may be useful in large scale aerial spraying on the farm land, it would not be used in targeted specific areas as it is not efficient in specific applications. The gasoline powered hexacopter UAV designed in this study is a low cost solution to farmers’ need for specific aerial applications of insecticides and herbicides. The UAV design can carry 2–3 gallons of herbicide (16.7–25.0 lbs.) for a flight time of more than 30 minutes without refueling. The design could be transported in a 60.3in × 56.7in pickup bed. Structural and fatigue analyses are performed on the complete structure using state of the art software SolidWorks Simulation. The minimum factor of safety is obtained to be 10 based on maximum von Mises stress failure criteria. Under normal conditions with an estimated commercial use of 100 cycles per day it is observed that the design would survive for about 13 years without any fatigue failure. A drop test analysis is performed to ensure the design can survive a 5 feet freefall and a frequency analysis is also performed to observe the critical natural frequency of the structure. Flow simulations are performed on the 6 propellers/blades model using state of the art software SolidWorks Flow Simulation to observe the effect of vorticity interactions on the lift force. The design has been reasonably optimized based on maximizing the lift force. With this new UAV design small scale and substantial farmers could afford a personal UAV for aerial applications with a small amount of capital whose absence hindered efficient and effective specific aerial application for many years.
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Ong, Wayne, Spot Srigrarom, and Henrik Hesse. "Design Methodology for Heavy-Lift Unmanned Aerial Vehicles with Coaxial Rotors." In AIAA Scitech 2019 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-2095.

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Bandala, Argel A., Aldrin G. Chua, Ryan R. Dajay, Rafael D. Rabacca, Ericka C. So, Jose Martin Z. Maningo, Arvin H. Fernando, and Ryan Rhay P. Vicerra. "Payload Lift and Transport Using Decentralized Unmanned Aerial Vehicle Quadcopter Teams." In TENCON 2018 - 2018 IEEE Region 10 Conference. IEEE, 2018. http://dx.doi.org/10.1109/tencon.2018.8650540.

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Liu, Jenn-Long. "Optimization Design of New High Lift Airfoils for an Unmanned Aerial Vehicle." In 42nd AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2004. http://dx.doi.org/10.2514/6.2004-1049.

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Boschetti, Pedro, Elsa Cárdenas, and Andrea Amerio. "Increasing Lift-Drag Ratio of an Unmanned Aerial Vehicle using Local Twist." In 25th AIAA Applied Aerodynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-4571.

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Reports on the topic "Aerial lifts"

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Berney, Ernest, Andrew Ward, and Naveen Ganesh. First generation automated assessment of airfield damage using LiDAR point clouds. Engineer Research and Development Center (U.S.), March 2021. http://dx.doi.org/10.21079/11681/40042.

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This research developed an automated software technique for identifying type, size, and location of man-made airfield damage including craters, spalls, and camouflets from a digitized three-dimensional point cloud of the airfield surface. Point clouds were initially generated from Light Detection and Ranging (LiDAR) sensors mounted on elevated lifts to simulate aerial data collection and, later, an actual unmanned aerial system. LiDAR data provided a high-resolution, globally positioned, and dimensionally scaled point cloud exported in a LAS file format that was automatically retrieved and processed using volumetric detection algorithms developed in the MATLAB software environment. Developed MATLAB algorithms used a three-stage filling technique to identify the boundaries of craters first, then spalls, then camouflets, and scaled their sizes based on the greatest pointwise extents. All pavement damages and their locations were saved as shapefiles and uploaded into the GeoExPT processing environment for visualization and quality control. This technique requires no user input between data collection and GeoExPT visualization, allowing for a completely automated software analysis with all filters and data processing hidden from the user.
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Martínez, Sebastián, Raúl Sánchez, and Patricia Yañez-Pagans. Getting a Lift: The Impact of Aerial Cable Cars in La Paz, Bolivia. Inter-American Development Bank, July 2018. http://dx.doi.org/10.18235/0001205.

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Martínez, Sebastián, Raúl Sánchez, and Patricia Yáñez. Getting a Lift: The Impact of Aerial Cable Cars in La Paz Bolivia. Inter-American Development Bank, December 2018. http://dx.doi.org/10.18235/0001481.

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Kelly, Luke. Threats to Civilian Aviation Since 1975. Institute of Development Studies (IDS), February 2021. http://dx.doi.org/10.19088/k4d.2021.019.

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This literature review finds that the main malicious threats to civilian aviation since 1975 are attacks by terrorist groups, deliberate or accidental damage arising from conflicts, and incidents caused by people who work for airlines or airports. While the sector has responded to hijackings and bombings with increasing security since the 1970s, actors seeking to attack aircraft have modified their tactics, and new threats such as liquid explosives and cyber attacks have emerged. Civilian aviation has seen relatively fewer accidents and deaths over the years, but threats remain. The review focuses on malicious threats to civilian aviation. It, therefore, excludes weather events or accidents. The first section lists major malicious threats to civilian aviation since 1975. It includes both actual and planned events (e.g. hijackings that were prevented) that are recorded in open-source documents. Each threat is listed alongside information on its cause (e.g. terrorism, state actions, crime), the context in which it occurred (broader factors shaping the risk including geography, regime type, technology), and its impact (on passengers, policy, security, economic). The second section discusses some of the trends in threats to aviation. Motives for malicious threats include terrorism, crime, asylum-seeking, and insider attacks by aggrieved or mentally ill airline staff. Hijacking has been the most common form of threat, although bombing or suicide attacks have killed more people. Threats may also take the form of accidental attacks on civilian planes misidentified as threats in conflict zones. Experts suggest that growing threats are cyberattacks and the use of unmanned aerial vehicles, although neither has yet caused a major incident.
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Aerial lift hazard recognition simulator. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, November 2016. http://dx.doi.org/10.26616/nioshpub2017103.

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Technician crushed when aerial platform lift engaged. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, February 2006. http://dx.doi.org/10.26616/nioshsface05or007.

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Laborer/rigger electrocuted during an aerial lift of equipment. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, January 2000. http://dx.doi.org/10.26616/nioshsface99ak011.

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Self-employed electrician dies while driving aerial lift in parking garage. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, February 1999. http://dx.doi.org/10.26616/nioshsface98ma043.

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Massachusetts bridge painter dies in fall from toppled aerial scissor lift. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, August 1993. http://dx.doi.org/10.26616/nioshsface92ma012.

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Company owner dies from fall after upper boom failure on aerial lift - Ohio. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, June 2007. http://dx.doi.org/10.26616/nioshface200703.

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