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Journal articles on the topic 'AirSim'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Roberts, Mari H., Elizabeth K. Boucher, Michael Lim, Antony R. Wilkes, and Iljaz Hodzovic. "Evaluation of Tip Surface Collision Count as a Measure of Fibreoptic Scope Handling Skills: A Randomized, Cross-Over Manikin Study." Journal of Anesthesiology 2014 (October 2, 2014): 1–5. http://dx.doi.org/10.1155/2014/718092.

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Background. In this pilot study, we evaluated tip collisions against three commonly used measures of fibreoptic scope handling skills. Methods. Seventy-seven anaesthetists were recruited to perform a standardized task on an Oxford Box and a modified AirSim manikin. Collision count was correlated against time to scope placement, a global rating scale score, and up-to-date fibreoptic experience. Results. Strong and moderate correlations were found between collision count and task completion time for the Oxford Box (ρ = 0.730, P < 0.0001) and AirSim manikin (ρ = 0.405, P < 0.0001), respecti

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Jelačić, Srdjan, Victor Ghioni, and Andrew Bowdle. "Airway Anatomy of AirSim High-fidelity Simulator." Anesthesiology 118, no. 1 (2013): 228–29. http://dx.doi.org/10.1097/aln.0b013e3182769530.

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Douglas, JA, AJ Senior, and A. Scott. "The Telford tonsillectomy tie trainer: an AirSim model modification." Annals of The Royal College of Surgeons of England 96, no. 8 (2014): 634. http://dx.doi.org/10.1308/rcsann.2014.96.8.634.

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Mladenović, Miloš. "PRIMENA UČENJA SA USLOVLJAVANJEM ZA OBUČAVANJE AGENTA ZA AUTONOMNU VOŽNJU AUTOMOBILA U SIMULATORU AIRSIM." Zbornik radova Fakulteta tehničkih nauka u Novom Sadu 35, no. 03 (2020): 604–7. http://dx.doi.org/10.24867/07be44mladenovic.

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Učenje uslovljavanjem je napretkom dubokog učenja i hardvera kao i razvojem novih naučno-tehnoloških izazova kao što su razvoj softvera za robote i samovozeće automobile postalo plodno istraživačko tle za sve naučnike i inženjere zainteresovane za ovu oblast. U ovom radu predstavljen je drugačiji pristup problemu autonomne vožnje u simulatoru - u kom se kombinuju tehnike računarskog vida i učenja sa uslovljavanjem da se napravi agent koji će se uspešno kretati u simuliranom okruženju. Evaluacija agenta urađena je poređenjem performansa modela u odnosu na postizanje zadatog cilja.

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Maw, Aye Aye, Maxim Tyan, Tuan Anh Nguyen, and Jae-Woo Lee. "iADA*-RL: Anytime Graph-Based Path Planning with Deep Reinforcement Learning for an Autonomous UAV." Applied Sciences 11, no. 9 (2021): 3948. http://dx.doi.org/10.3390/app11093948.

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Path planning algorithms are of paramount importance in guidance and collision systems to provide trustworthiness and safety for operations of autonomous unmanned aerial vehicles (UAV). Previous works showed different approaches mostly focusing on shortest path discovery without a sufficient consideration on local planning and collision avoidance. In this paper, we propose a hybrid path planning algorithm that uses an anytime graph-based path planning algorithm for global planning and deep reinforcement learning for local planning which applied for a real-time mission planning system of an aut

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Park, Sang-Kyu, Jin-Seok Jeong, Ha-Young Shi, and Beom-Soo Kang. "Simulation for Development and Validation of Drone for Inspection Inside Boilers in High Temperature Thermal Power Plants Using AirSim." Journal of the Korean Society for Aeronautical & Space Sciences 49, no. 1 (2021): 53–61. http://dx.doi.org/10.5139/jksas.2021.49.1.53.

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Park, Sang-Kyu, Jin-Seok Jeong, Ha-Young Shi, and Beom-Soo Kang. "Simulation for Development and Validation of Drone for Inspection Inside Boilers in High Temperature Thermal Power Plants Using AirSim." Journal of the Korean Society for Aeronautical & Space Sciences 49, no. 1 (2021): 53–61. http://dx.doi.org/10.5139/jksas.2021.49.1.53.

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Arce, Samuel, Cory A. Vernon, Joshua Hammond, et al. "Automated 3D Reconstruction Using Optimized View-Planning Algorithms for Iterative Development of Structure-from-Motion Models." Remote Sensing 12, no. 13 (2020): 2169. http://dx.doi.org/10.3390/rs12132169.

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Unsupervised machine learning algorithms (clustering, genetic, and principal component analysis) automate Unmanned Aerial Vehicle (UAV) missions as well as the creation and refinement of iterative 3D photogrammetric models with a next best view (NBV) approach. The novel approach uses Structure-from-Motion (SfM) to achieve convergence to a specified orthomosaic resolution by identifying edges in the point cloud and planning cameras that “view” the holes identified by edges without requiring an initial model. This iterative UAV photogrammetric method successfully runs in various Microsoft AirSim

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Xue, Zhihan, and Tad Gonsalves. "Vision Based Drone Obstacle Avoidance by Deep Reinforcement Learning." AI 2, no. 3 (2021): 366–80. http://dx.doi.org/10.3390/ai2030023.

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Research on autonomous obstacle avoidance of drones has recently received widespread attention from researchers. Among them, an increasing number of researchers are using machine learning to train drones. These studies typically adopt supervised learning or reinforcement learning to train the networks. Supervised learning has a disadvantage in that it takes a significant amount of time to build the datasets, because it is difficult to cover the complex and changeable drone flight environment in a single dataset. Reinforcement learning can overcome this problem by using drones to learn data in

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Noonan, John, Hector Rotstein, Amir Geva, and Ehud Rivlin. "Global Monocular Indoor Positioning of a Robotic Vehicle with a Floorplan." Sensors 19, no. 3 (2019): 634. http://dx.doi.org/10.3390/s19030634.

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This paper presents a global monocular indoor positioning system for a robotic vehicle starting from a known pose. The proposed system does not depend on a dense 3D map, require prior environment exploration or installation, or rely on the scene remaining the same, photometrically or geometrically. The approach presents a new way of providing global positioning relying on the sparse knowledge of the building floorplan by utilizing special algorithms to resolve the unknown scale through wall–plane association. This Wall Plane Fusion algorithm presented finds correspondences between walls of the

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Farré, Violeta, Cristóbal Añez, Vicente Serrano, Natalia Aragonès, Montserrat Camps, and Inmaculada de Molina. "Modifications to the Airway Management Trainer Intubation Head for Training in Difficult Airway Recognition Through a Comparative Study With the Airsim® Intubation Head." Simulation in Healthcare: The Journal of the Society for Simulation in Healthcare 9, no. 2 (2014): 136–40. http://dx.doi.org/10.1097/sih.0000000000000018.

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Yang, Tao, Qiang Ren, Fangbing Zhang, et al. "Hybrid Camera Array-Based UAV Auto-Landing on Moving UGV in GPS-Denied Environment." Remote Sensing 10, no. 11 (2018): 1829. http://dx.doi.org/10.3390/rs10111829.

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With the rapid development of Unmanned Aerial Vehicle (UAV) systems, the autonomous landing of a UAV on a moving Unmanned Ground Vehicle (UGV) has received extensive attention as a key technology. At present, this technology is confronted with such problems as operating in GPS-denied environments, a low accuracy of target location, the poor precision of the relative motion estimation, delayed control responses, slow processing speeds, and poor stability. To address these issues, we present a hybrid camera array-based autonomous landing UAV that can land on a moving UGV in a GPS-denied environm

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Li, Jing, Shuo Chen, Fangbing Zhang, Erkang Li, Tao Yang, and Zhaoyang Lu. "An Adaptive Framework for Multi-Vehicle Ground Speed Estimation in Airborne Videos." Remote Sensing 11, no. 10 (2019): 1241. http://dx.doi.org/10.3390/rs11101241.

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With the rapid development of unmanned aerial vehicles (UAVs), UAV-based intelligent airborne surveillance systems represented by real-time ground vehicle speed estimation have attracted wide attention from researchers. However, there are still many challenges in extracting speed information from UAV videos, including the dynamic moving background, small target size, complicated environment, and diverse scenes. In this paper, we propose a novel adaptive framework for multi-vehicle ground speed estimation in airborne videos. Firstly, we build a traffic dataset based on UAV. Then, we use the dee

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Mahajan, Sachit, Jennifer Gabrys, and Joanne Armitage. "AirKit: A Citizen-Sensing Toolkit for Monitoring Air Quality." Sensors 21, no. 12 (2021): 4044. http://dx.doi.org/10.3390/s21124044.

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Increasing urbanisation and a better understanding of the negative health effects of air pollution have accelerated the use of Internet of Things (IoT)-based air quality sensors. Low-cost and low-power sensors are now readily available and commonly deployed by individuals and community groups. However, there are a wide range of such IoT devices in circulation that differently focus on problems of sensor validation, data reliability, or accessibility. In this paper, we present AirKit, which was developed as an integrated and open source “social IoT technology”. AirKit enables a comprehensive ap

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Xiao, Hou Di, Pan Pan Mi, Long Bin Liu, and Shuai Cao. "A New Method of Strengthening Longitudinal Static Stability of Airship in Ascent." Applied Mechanics and Materials 687-691 (November 2014): 212–15. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.212.

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To improve the controllability and maneuverability, airship is usually designed as static instability. But the airship is vulnerable to sudden wind interference in its ascent, resulting in divergent pitching motion. A new aerodynamic shape was put forward which added a inflatable aerodynamic-lift wing at backward of the airship hull. With the method of Computational Fluid Dynamics (CFD), aerodynamic characteristics and longitudinal static stability of the conventional airship and new winged airship were comparative investigated. It can be concluded that the new winged airship was longitudinal

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Fulton, Garland. "AIRSHIP PROGRESS AND AIRSHIP PROBLEMS." Journal of the American Society for Naval Engineers 41, no. 1 (2009): 30–63. http://dx.doi.org/10.1111/j.1559-3584.1929.tb03702.x.

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17

Liu, Gang, Fan Wang, and Guan Xin Hong. "Dynamic Modeling and Dynamic Characteristic Analysis of a New Concept Stratospheric V-Shaped Airship." Applied Mechanics and Materials 145 (December 2011): 37–42. http://dx.doi.org/10.4028/www.scientific.net/amm.145.37.

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It has important scientific and engineering applications for near-space platform to design the buoyancy-lifting aircraft with both bigger volume and higher aerodynamic efficiency. This paper provided a design of a new concept V-shaped airship which has a capacity of buoyancy-lifting configuration than the same-weight class conventional airship. In addition, two engines could provide rolling, yawing and pitching moments for the V-shaped airship by changing directions and creating different thrust. Based on the thick aerofoil, the geometry of this V-shaped configuration was then used to develop

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Azouz, Naoufel, Mahmoud Khamlia, Jean Lerbet, and Azgal Abichou. "Stabilization of an Unconventional Large Airship When Hovering." Applied Sciences 11, no. 8 (2021): 3551. http://dx.doi.org/10.3390/app11083551.

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In this paper, we present the stabilization of an unconventional unmanned airship above a loading and unloading area. The study concerns a quad-rotor flying wing airship. This airship is devoted to freight transport. However, during the loading and unloading phases, the airship is very sensitive to squalls. In this context, we present in this paper the dynamic model of the airship, and we propose a strategy for controlling it under the effects of a gust of wind. A feedforward/feedback control law is proposed to stabilize the airship when hovering. As part of the control allocation, the non-lin

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19

Ahmad, Rizal, and Mark Neal. "AirAsia." Asian Journal of Management Cases 3, no. 1 (2006): 25–50. http://dx.doi.org/10.1177/097282010500300104.

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Ahmad, Rizal. "AirAsia." Asian Journal of Management Cases 7, no. 1 (2010): 7–31. http://dx.doi.org/10.1177/097282011000700103.

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21

Song, Kyo D., Jaehwan Kim, Jung W. Kim, et al. "Preliminary operational aspects of microwave-powered airship drone." International Journal of Micro Air Vehicles 11 (January 2019): 175682931986136. http://dx.doi.org/10.1177/1756829319861368.

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This paper reports the development of an experimental airship drone powered by microwave as a precursor toward a large-scale airship drone for cargo transportation in mind under the collaboration with U.S. Federal Highway Administration and universities. Research work on a 2.2-m long airship drone powered by X-band microwave has provided sufficient data for the design and analysis for the operation of airship drone. A block of 16 rectenna array sheets of X-band was placed on each side of the airship drone (total 32 sheets) to collect and convert microwave power into direct current power for ru

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22

Xiao, Zhi Yuang, Mu Qing Yang, Dong Li Ma, and Zheng Neng Li. "Design of Variable Airship Mechanism Based on Finite Element Method." Advanced Materials Research 690-693 (May 2013): 1899–902. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.1899.

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Variable airship is an important research direction because it can overcome the difficulties in climbing phase caused by huge volume, and can also solve the problem of insufficient strength. The requirements of variation bring significant challenges for the airship structural design. In this paper, a radial variation mechanism was proposed based on an existing airship. The mechanism can achieve a continuous variation of the cross-sectional area from 100 to 7.2 percent. The airship structure was analyzed using the finite element method to make sure the airship has a high safety margin in variou

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Wang, Gai Juan, Yuan Ying Qiu, and Xin Wen Zhao. "Simulation and Evaluation of Wind-Induced Displacements of the Giant Airship in its Outbound Process." Applied Mechanics and Materials 268-270 (December 2012): 1109–13. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.1109.

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Aiming at an outbound process of the airship driven by the hydraulic rod and cables, a simulation of the wind-induced displacement for the airframe is conducted. First of all, a spatial three-dimensional flow field including the boathouse and airframe is calculated using fluid dynamics, and a wind pressure distributed on the airframe is equivalent to the forces and moments exerted on the airship head in three directions. Then, a finite element model of the airship structure is modeled and a simulation of the wind-induced displacements for the giant airship is conducted. Finally, a collision po

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Yu, Sang il, and Chang Yun Park. "A Responsible Airtime Approach for True Time-Based Fairness in Multi-Rate WiFi Networks." Sensors 18, no. 11 (2018): 3658. http://dx.doi.org/10.3390/s18113658.

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Airtime fairness, or time-based fairness, has been well recognized as a method to solve WiFi performance anomalies and provide a balance between fairness and spectrum efficiency in multi-rate wireless networks. However, the definition of airtime is vague and simplistic. In this paper, it is demonstrated that current airtime fair scheduling results in unfairness in reality because overheads are neglected or unfairly counted. We introduce a notion of responsible airtime, which covers not only the data transmission time, but also all overheads, even a TCP ACK segment in TCP traffic. An approach b

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Malek, Azizi, M. F Sedan, and A. S M Harithuddin. "Development of attitude control system for hybrid airship vehicle." International Journal of Engineering & Technology 7, no. 4.13 (2018): 99. http://dx.doi.org/10.14419/ijet.v7i4.13.21339.

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This paper documents and presents the development of attitude control system of Hybrid Airship Unmanned Aerial Vehicle (HAU) that should be able to change its attitude condition based on the response processed from the provided input. This is accomplished by data acquisition method that retrieves data from a flight controller and processes it into the control system without looking in deep on the mathematical model of the airship. Besides that, PID controller is used in order to create a good stable response for the hybrid airship. A working hybrid airship prototype was successfully developed

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Chen, Zheng, Haitao Zhao, Xiaowang Li, and Ji’an Chen. "Deflection analysis of the airship structure based on the tapered inflatable beam." Aircraft Engineering and Aerospace Technology 91, no. 4 (2019): 601–6. http://dx.doi.org/10.1108/aeat-04-2018-0138.

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Purpose The purpose of this paper is to analyse the deflection of the flexible airship structure in a new way which can decrease the calculation amount and improve the calculation speed. Design/methodology/approach Infinitesimal method and tapered inflatable beam theory are combined to study the mechanics characteristics of the airship. Firstly, infinitesimal method is introduced into the airship structure analysis. The airship structure can be divided into several tapered inflatable beam elements. Then, tapered inflatable beam theory is improved and a developed model of the tapered inflatable

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Zhang, M., X. Wang, and D. Duan. "Panel method predictions of added mass for flexible airship." Aeronautical Journal 117, no. 1191 (2013): 519–31. http://dx.doi.org/10.1017/s0001924000008162.

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Abstract Because of the huge volume and inflated membrane structure of stratosphere airship, the deformation of stratosphere airship is very sensitive to the change of environment conditions such as wind, temperature and so on. The influence of deformation on manipulation and control is very remarkable. So, during the course of building flight dynamic model of the flexible airship, the added-mass matrix of deformation is very important part in the state equations of dynamic models. For obtaining the accurate added-mass matrix of different flexible airship, we proposed an approach that can calc

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Zhang, Xin Li, Yun An Hu, and Di Liu. "The Research on Height Control of Airship with Constant Flying Speed." Applied Mechanics and Materials 644-650 (September 2014): 875–78. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.875.

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The PID control scheme of airship with fixed flying high is studied in allusion to pitch channel nonlinear model of a class of stratosphere airship in this paper. The traditional PID control law is designed aim at the fixed high flight control of airship. The detailed simulation analysis is presented. It indicates that the airship can realize the fixed high flight in the range of 1000 meters. When flying high increase further, PID control scheme is not reasonable because instruction is too large. At the same time, the speed of engine has large influence on PID control scheme. The research of p

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Gu, Yun Chao, Long Bin Liu, Shuai Cao, Hou Di Xiao, and Ming Yun Lv. "Natural Aging Mechanics Characteristics on Fiber Reinforced High Altitude Airship Envelope Composite." Advanced Materials Research 1049-1050 (October 2014): 73–76. http://dx.doi.org/10.4028/www.scientific.net/amr.1049-1050.73.

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For High altitude airship (HAA) with long time affected by space harsh environment, due to the occurrence of natural light radiation aging physical and mechanical properties, fiber-reinforced airship envelope material results in degradation of the mechanical load performance, even causing damage to the balloon airship. Based on the ground aging simulation of the airship envelope material under the natural light, the morphology of airship envelope material in the natural aging process can be observed and the specimen comparison test is carried on for its fracture strength and breaking elongatio

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Agrawal, S., D. Gobiha, and N. K. Sinha. "Nonlinear parameter estimation of airship using modular neural network." Aeronautical Journal 124, no. 1273 (2019): 409–28. http://dx.doi.org/10.1017/aer.2019.125.

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AbstractThe prime focus of this work is to estimate stability and control derivatives of an airship in a completely nonlinear environment. A complete six degrees of freedom airship model has its aerodynamic model as nonlinear functions of angle of attack. Estimating the parameters of aerodynamic model in a nonlinear environment is challenging as it demands an exhaustive dataset that could cover the entire regime of operation of airship. In this work, data generation is achieved by simulating the mathematical model of airship for different trim conditions obtained from continuation analysis. Th

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Baogang, Geng, Zhang Yongdong, Meng Xiaojun, et al. "Dynamics Analysis of Mooring Near Space Airship with Nosecone Constraint." MATEC Web of Conferences 288 (2019): 02005. http://dx.doi.org/10.1051/matecconf/201928802005.

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The near space airships usually have a large volume. when the airship leave the boathouse, it is influenced by the near surface wind significantly, and the attitude of the airship will change, and the risk of the experiment will be increase. In this paper, the dynamics method is used to analyse the force in the mooring rope and the attitude of the airship with nosecone constraint. The kinetic equation is established. A typical near space airship is choose as an example. The Runge- Kutta method is used to solve the dynamic equation. According to calculation result, the change law of the force i

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Nugraha, Ridha Aditya. "AIRASIA: FLYING CABOTAGE UNDER CLOAK IN INDONESIA AND ASEAN." Jurnal Hukum & Pembangunan 45, no. 2 (2016): 163. http://dx.doi.org/10.21143/jhp.vol45.no2.1.

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Cabotage has become a sensitive issue from time to time since it is very related to the sovereignty of a state. Foreign direct investment in aviation business has lead into a new chapter of cabotage. AirAsia has seen the gap within the Indonesian Law as a way to perform a cloaked cabotage under Indonesia AirAsia. A new perspective of a cloaked cabotage under the 8th and 9th Freedoms of the Air held by AirAsia and Indonesia AirAsia with their successful business and marketing formula will be described.

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Liu, Yu, and Yi Lin Wu. "Model-Based Verifying and Design of Autonomous Airship." Applied Mechanics and Materials 66-68 (July 2011): 1748–54. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1748.

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Based on the Kirchhoff equations, Newton-Euler laws, boundary layer theory and mass definition, the six degrees of freedom dynamic model of airship complete with aerodynamic forces, wind effect is presented. Then, the nonlinear dynamic model is divided into three group equations by restricting airship motion in different planes respectively. The motion characteristics of airship, including stability, the effect of ballast position and rotational damping, are studied using linearized model. The results of simulation verify the correctness of the theoretical analysis and airship design.

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Sun, Kang Wen, Gao Ming Liang, Ke Li, and Ming Zhu. "Analysis for Solar Array Radiation Receiving Characteristics on Stratospheric Airship." Advanced Materials Research 772 (September 2013): 608–14. http://dx.doi.org/10.4028/www.scientific.net/amr.772.608.

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As one of the key technic of achieving high-altitude and long-time flight, the stratospheric airship energy system in stratosphere is always the important point but also very difficult. In this paper, the stratospheric airship geometry analysis as a starting point, through a series analysis as follow: the stratospheric airship surface mesh model, the sun vector, the relationship between the sun vector and the body coordinate system, and the solar radiation model, we have accomplished the characteristics analysis of the radiation receiving on stratospheric airship. The analysis result show that

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Reddy, L. Sudershan, Ranjith P V, Yu Cing Lim, et al. "The Survival of Airasia During the Covid-19 Pandemic." International Journal of Tourism and Hospitality in Asia Pasific 4, no. 2 (2021): 42–56. http://dx.doi.org/10.32535/ijthap.v4i2.1058.

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This research is to investigate the survival of AirAsia during the pandemic Covid-19. The findings will show how AirAsia faced challenges during the pandemic and ways to overcome them. This research underlined the challenges faced by AirAsia such as flight cancellation, decrease in demand, loss of new customers, and paying huge amounts of refunds. AirAsia used several ways such as controlling the operational cost, exploring new business, carrying out promotions, and applying for bank loans and weighing proposals. As a result, AirAsia’s financial problems would be solved by reducing operational

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Abdallah, Fida Ben, Naoufel Azouz, Lotfi Beji, and Azgal Abichou. "Modeling of a heavy-lift airship carrying a payload by a cable-driven parallel manipulator." International Journal of Advanced Robotic Systems 16, no. 4 (2019): 172988141986176. http://dx.doi.org/10.1177/1729881419861769.

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In this article, we present a preliminary analysis of a heavy-lift airship carrying a payload through a cable-driven parallel robot. With unlimited access to isolated locations around the globe, heavy-lift airship enables affordable and safe delivery of heavy cargo thanks to its vertical takeoff and landing capabilities. By considering the airship and the cable-driven parallel robot as a combined system, the kinematic and dynamic models are developed. The choice of the proposed decentralized control structure is justified by the weak coupling of the two subsystems (i.e. airship and cable-drive

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Wang, Q., J. Chen, G. Fu, D. Duan, and H. Zhao. "A methodology for optimisation design and analysis of stratosphere airship." Aeronautical Journal 113, no. 1146 (2009): 533–40. http://dx.doi.org/10.1017/s0001924000003183.

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Abstract This paper presents a methodology for studying the feasibility of stratosphere airship for high altitude long endurance missions and arriving at the baseline specifications of conventional configuration of stratosphere airship, given the performance and operational requirements. Based on this methodology, the AODAP platform (Airship Optimisation Design and Analysis Platform) was developed. Some innovative concepts used in AODAP that are different from previous methods and codes are presented. The shape optimisation of airship was introduced into the design process, and several optimum

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Castro, Juciane Maria de Andrade, Rodrigo R. Resende, Luciana Mirotti, et al. "Role of M2 Muscarinic Receptor in the Airway Response to Methacholine of Mice Selected for Minimal or Maximal Acute Inflammatory Response." BioMed Research International 2013 (2013): 1–12. http://dx.doi.org/10.1155/2013/805627.

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Airway smooth muscle constriction induced by cholinergic agonists such as methacholine (MCh), which is typically increased in asthmatic patients, is regulated mainly by muscle muscarinic M3 receptors and negatively by vagal muscarinic M2 receptors. Here we evaluated basal (intrinsic) and allergen-induced (extrinsic) airway responses to MCh. We used two mouse lines selected to respond maximally (AIRmax) or minimally (AIRmin) to innate inflammatory stimuli. We found that in basal condition AIRmin mice responded more vigorously to MCh than AIRmax. Treatment with a specific M2 antagonist increased

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Mazhar, Farrukh, Mohammad A. Choudhry, and Muhammad Shehryar. "Nonlinear auto-regressive neural network for mathematical modelling of an airship using experimental data." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 7 (2018): 2549–69. http://dx.doi.org/10.1177/0954410018783131.

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Autonomous flight of an aerial vehicle requires a sufficiently accurate mathematical model, which can capture system dynamics in the presence of external disturbances. Artificial neural network is known for ideal in capturing systems behaviour, where little knowledge about vehicle dynamics is available. In this paper, we explored this potential of artificial neural network for characterizing nonlinear dynamics of an unmanned airship. The flight experimentation data for an outdoor experimental airship are acquired through a series of pre-determined flight tests. The experimental data are subjec

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Susanti, Susanti. "Persepsi Penumpang Terhadap Pemilihan Low Cost Carrier (Studi Kasus Maskapai Indonesia Airasia)." Warta Penelitian Perhubungan 26, no. 9 (2019): 491. http://dx.doi.org/10.25104/warlit.v26i9.925.

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Skytrax pada Tahun 2014 telah merilis hasil penilaian penumpang dari seluruh dunia dan menempatkan maskapai AirAsia sebagai maskapai low cost carrier atau maskapai berbiaya murah terbaik di duniasebanyak 6 (enam) kali berturut-turut. Penelitian ini berusaha menggali faktor apa saja yang memiliki peran penting yang mempengaruhi persepsi penumpang Indonesia AirAsia dalam memilih maskapai tersebut. Penelitian ini bertujuan untuk mengetahui persepsi penumpang LCC dalam memilih maskapai AirAsia di Indonesia. Metode yang digunakan dalam penelitian ini adalah metode analisis faktor. Hasil penelitian

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Singh, Padmalini, Dilip D, Goh Kai Wen, et al. "The Impact of AirAsia’s E-Commerce Websites on Its Consumer Buying Behavior." International Journal of Tourism and Hospitality in Asia Pasific 4, no. 1 (2021): 34–42. http://dx.doi.org/10.32535/ijthap.v4i1.1019.

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The purpose of this study is to examine the impact of e-commerce websites on consumer’s buying behavior of AirAsia and to provide suggestions to AirAsia to improve its consumer’s shopping experience on its e-commerce website. This research applied qualitative methodology by interviews. It will provide the company with additional understanding about the impact of e-commerce websites on consumer’s buying behavior and the effective suggestions provided are highly practicable for the company. It is necessary for AirAsia to understand their consumer’s buying behavior to improve the company’s perfor

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KLIMASEWISKI, MARSHALL N. "NOBILE'S AIRSHIP." Yale Review 87, no. 1 (2010): 111–31. http://dx.doi.org/10.1111/j.1467-9736.1999.tb00100.x.

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Aodha, Colette Nic. "Spúnóg Airgid." Comhar 63, no. 6 (2003): 9. http://dx.doi.org/10.2307/25574650.

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Hong, Luhe, Hui-Yu Jin, Xianwu Lin, and Weiyao Lan. "Coordinated Control of Pressure Difference and Rising Velocity for Stratospheric Airship with Thermal Effects." Mathematical Problems in Engineering 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/923156.

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Ascending control of stratospheric airship is a challenging control problem, especially if both the rising velocity and the pressure difference between the inside and outside of the airship are required to be controlled simultaneously during ascending. In this paper, a coordinated scheme to control pressure difference and rising velocity of stratospheric airship with vector thrust is presented. With the control scheme, the airship maintains the pressure difference by exhausting air with feedback control. At the same time, the supplemental thrust is generated to compensate the buoyancy fluctuat

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Chen, Qi, and Ming Zhu. "Feasibility Research on Traditional-Shape Stratospheric Airship." Advanced Materials Research 457-458 (January 2012): 1554–66. http://dx.doi.org/10.4028/www.scientific.net/amr.457-458.1554.

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Stratospheric airship is capable of station-keeping at high altitude in precondition of the balance of buoyancy and weight and of thrust and drag. Based on computation process, when some initial technology guidelines and conditions are supposed, the size of airship is gained and it is analyzed that certain technology guideline has more or less influence on length and payload of airship. It is concluded from the analyses that envelope mass/area ratio had the largest effect on key elements of airship, such as length and payload etc. Meanwhile, based on some available design parameters of typical

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Yang, Yue Neng, Jie Wu, and Wei Zheng. "Modeling Approach of a Near-Space Airship Using Newton-Euler and Lagrangian Formulation." Applied Mechanics and Materials 232 (November 2012): 553–60. http://dx.doi.org/10.4028/www.scientific.net/amm.232.553.

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This paper presents dynamics modeling approach of the near-space airship. First, reference frames and motion variables of the airship are defined, and dynamics model of an airship is derived from the Newton-Euler formulation. Second, the Lagrangian modeling approach in terms of quasi-coordinates is presented, and dynamics model is derived form the Lagrangian formulation, considering the airship and its ambient air as a “rigid body-fluid” system from an energy point of view. The added inertial, gravity, aerostatics, and dissipative forces are incorporated into the dynamics model, and are expres

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Mohd Shah, Hairol Nizam, Mohd Zamzuri Ab Rashid, Zalina Kamis, et al. "Design and Develop an Autonomous UAV Airship for Indoor Surveillance and Monitoring Applications." JOIV : International Journal on Informatics Visualization 2, no. 1 (2018): 1. http://dx.doi.org/10.30630/joiv.2.1.33.

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This project is about to develop an airship based on small size remotely controlled by human. The airship is one of Unmanned Airship Vehicle (UAV) which is can be apply in advertising, VIP security inspection, traffic monitoring and management and so on. The main purpose of this project is to design and develop an autonomous UAV airship for indoor surveillance and monitoring applications. The image will be captured from wireless camera where it mounted at a bottom of gondola. To determine the centroid points of the object are implemented in three phase edge detector, canny operator and thresho

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Fan, Yong Hua, Xin Li, and Yun Feng Yu. "High Altitude Airship Flight Control System Design and Simulation." Applied Mechanics and Materials 128-129 (October 2011): 142–45. http://dx.doi.org/10.4028/www.scientific.net/amm.128-129.142.

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The high altitude airship can not have desired performance to control the altitude rapidly and accurately when the elevator or ancillary air bursa charge or deflation is used only, because the elevator has little efficiency when the velocity is low and auxiliary air bursas charge or deflation control is very slow. It is present a method to design flight control system for a high altitude airship using auxiliary air bursas charge or deflation and elevator combination control. This combination control scheme is that the ancillary air bursa and elevator are also used to control the airship attitu

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Zhu, Bing-Jie, Xi-Xiang Yang, Xiao-Long Deng, Zhen-Yu Ma, Zhong-Xi Hou, and Gao-Wei Jia. "Trajectory optimization and control of stratospheric airship in cruising." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 233, no. 10 (2019): 1329–39. http://dx.doi.org/10.1177/0959651819832723.

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Stratospheric airships are important platforms for near-space enduring cruising capability for several applications. Since energy shortage is one of major limiting factors in stratospheric airship, it is crucial to develop novel methods to reduce the requirement on energy systems. In this article, optimal trajectory of stratospheric airship in gradient wind fields is investigated in order to reduce energy consumption. First, polynomial expressions for wind gradients are assumed, and three-dimensional point mass airship equations of motion are used. Then the variety characters of energy for str

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Katz, Iana Suly Santos, Layra Lucy Albuquerque, Alessandra Paes Suppa, et al. "7,12-Dimethylbenz(a)anthracene-Induced Myelotoxicity Differs in Mice Selected for High or Low Acute Inflammatory Response." International Journal of Toxicology 33, no. 2 (2014): 130–42. http://dx.doi.org/10.1177/1091581814522837.

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Polycyclic aromatic hydrocarbons, such as 7,12-dimethylbenz(a)anthracene (DMBA), are environmental pollutants that exert multiple toxic and carcinogenic effects. Studies showed that these effects are mediated by activation of the aryl hydrocarbon receptor (AhR) and modulated by allelic variants of Ahr gene. Here, we investigated the effects of DMBA treatment in the inflammatory response and bone marrow (BM) hematopoietic function of maximal acute inflammatory response (AIRmax) and minimal acute inflammatory response (AIRmin) heterogeneous mouse lines selected for high and low acute inflammator

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