The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
Graham Wild - One of the best experts on this subject based on the ideXlab platform.
-
A Preliminary Investigation of Maintenance Contributions to Commercial Air Transport Accidents
Aerospace, 2020Co-Authors: Fatima Najeeb Khan, Ayiei Ayiei, Glenn Baxter, John Murray, Graham WildAbstract:Aircraft maintenance includes all the tasks needed to ensure an Aircraft’s continuing Airworthiness. Accidents that result from these maintenance activities can be used to assess safety. This research seeks to undertake a preliminary investigation of accidents that have maintenance contributions. An exploratory design was utilized, which commenced with a content analysis of the accidents with maintenance contributions (n = 35) in the official ICAO accident data set (N = 1277), followed by a quantitative ex-post facto study. Results showed that maintenance contributions are involved in 2.8 ± 0.9% of ICAO official accidents. Maintenance accidents were also found to be more likely to have one or more fatalities (20%), compared to all ICAO official accidents (14.7%). The number of accidents with maintenance contributions per year was also found to have reduced over the period of the study; this rate was statistically significantly greater than for all accidents (5%/year, relative to 2%/year). Results showed that Aircraft between 10 and 20 years old were most commonly involved in accidents with maintenance contributions, while Aircraft older than 18 years were more likely to result in a hull loss, and Aircraft older than 34 years were more likely to result in a fatality.
-
A review of human factors causations in Commercial Air Transport accidents and incidents: From to 2000–2016
Progress in Aerospace Sciences, 2018Co-Authors: Husam Kharoufah, John Murray, Glenn Baxter, Graham WildAbstract:Abstract Human factors have been defined by the International Civil Aviation Organization (ICAO) as “about people in their living and working situations; about their relationship with machines, with procedures and with the environment about them; and about their relationships with other people (at work)”. Human factors contribute to approximately 75% of Aircraft accidents and incidents. As such, understanding their influence is essential to improve safety in the aviation industry. This study examined the different human factors causations in a random sample of over 200 Commercial Air Transport accidents and incidents from 2000 to 2016. The main objective of this study was to identify the principal human factor contributions to aviation accidents and incidents. An exploratory research design was utilised. The qualitative data were recorded in a database, and were coded into categories about the flights (including date, manufacturer, carrier, state of occurrence, etc). These categories were then analysed using Chi-Squared tests to determine which were statistically significant in terms of having an influence on the accidents/incidents. The most significant human factor was found to be situational awareness followed by non-adherence to procedures. In addition, charter operations proved to have a significantly higher rate of human factor related occurrence as compared to other type of operations. A significant finding was that Africa has a high rate of accidents/incidents relative to the amount of traffic and Aircraft movements. These findings reflect some of the more noteworthy incidents that have received significant media attention, including Air Asia 8501 on the 28th of December 2014, TransAsia Airways 235 on the 4th of February 2015, and Air France 447 on the 1st of June 2009; these accidents resulted in a significant loss of lives where situational awareness and non-adherence to procedures were significant contributing factors.
-
a review of human factors causations in Commercial Air Transport accidents and incidents from to 2000 2016
Progress in Aerospace Sciences, 2018Co-Authors: Husam Kharoufah, John Murray, Glenn Baxter, Graham WildAbstract:Abstract Human factors have been defined by the International Civil Aviation Organization (ICAO) as “about people in their living and working situations; about their relationship with machines, with procedures and with the environment about them; and about their relationships with other people (at work)”. Human factors contribute to approximately 75% of Aircraft accidents and incidents. As such, understanding their influence is essential to improve safety in the aviation industry. This study examined the different human factors causations in a random sample of over 200 Commercial Air Transport accidents and incidents from 2000 to 2016. The main objective of this study was to identify the principal human factor contributions to aviation accidents and incidents. An exploratory research design was utilised. The qualitative data were recorded in a database, and were coded into categories about the flights (including date, manufacturer, carrier, state of occurrence, etc). These categories were then analysed using Chi-Squared tests to determine which were statistically significant in terms of having an influence on the accidents/incidents. The most significant human factor was found to be situational awareness followed by non-adherence to procedures. In addition, charter operations proved to have a significantly higher rate of human factor related occurrence as compared to other type of operations. A significant finding was that Africa has a high rate of accidents/incidents relative to the amount of traffic and Aircraft movements. These findings reflect some of the more noteworthy incidents that have received significant media attention, including Air Asia 8501 on the 28th of December 2014, TransAsia Airways 235 on the 4th of February 2015, and Air France 447 on the 1st of June 2009; these accidents resulted in a significant loss of lives where situational awareness and non-adherence to procedures were significant contributing factors.
Eric Horvitz - One of the best experts on this subject based on the ideXlab platform.
-
wi fly widespread opportunistic connectivity via Commercial Air Transport
Hot Topics in Networks, 2017Co-Authors: Talal Ahmad, Ranveer Chandra, Ashish Kapoor, Michael Daum, Eric HorvitzAbstract:More than half of the world's population face barriers in accessing the Internet. A recent ITU study estimates that 2.6 billion people cannot afford connectivity and that 3.8 billion do not have access. Recent proposals for providing low-cost connectivity include fielding of drones and long-lasting balloons in the stratosphere. We propose a more economical alternative, which we refer to as Wi-Fly, that leverages existing Commercial planes to provide Internet connectivity to remote regions. In Wi-Fly we enable communication between a lightweight Wi-Fi device on Commercial planes and ground stations, resulting in connectivity in regions that do not otherwise have low-cost Internet connectivity. Wi-Fly leverages existing ADS-B signals from planes as a control channel to ensure that there is a strong link from the plane to the ground, and that the stations intelligently wake up and associate to the appropriate AP. For our experimentation, we have customized two Airplanes to conduct measurements. Through empirical experiments with test flights and simulations, we show that Wi-Fly and its extensions have the potential to provide connectivity to the most remote regions of the world at a significantly lower cost than existing alternatives.
-
HotNets - Wi-Fly: Widespread Opportunistic Connectivity via Commercial Air Transport
Proceedings of the 16th ACM Workshop on Hot Topics in Networks, 2017Co-Authors: Talal Ahmad, Ranveer Chandra, Ashish Kapoor, Michael Daum, Eric HorvitzAbstract:More than half of the world's population face barriers in accessing the Internet. A recent ITU study estimates that 2.6 billion people cannot afford connectivity and that 3.8 billion do not have access. Recent proposals for providing low-cost connectivity include fielding of drones and long-lasting balloons in the stratosphere. We propose a more economical alternative, which we refer to as Wi-Fly, that leverages existing Commercial planes to provide Internet connectivity to remote regions. In Wi-Fly we enable communication between a lightweight Wi-Fi device on Commercial planes and ground stations, resulting in connectivity in regions that do not otherwise have low-cost Internet connectivity. Wi-Fly leverages existing ADS-B signals from planes as a control channel to ensure that there is a strong link from the plane to the ground, and that the stations intelligently wake up and associate to the appropriate AP. For our experimentation, we have customized two Airplanes to conduct measurements. Through empirical experiments with test flights and simulations, we show that Wi-Fly and its extensions have the potential to provide connectivity to the most remote regions of the world at a significantly lower cost than existing alternatives.
John Murray - One of the best experts on this subject based on the ideXlab platform.
-
A Preliminary Investigation of Maintenance Contributions to Commercial Air Transport Accidents
Aerospace, 2020Co-Authors: Fatima Najeeb Khan, Ayiei Ayiei, Glenn Baxter, John Murray, Graham WildAbstract:Aircraft maintenance includes all the tasks needed to ensure an Aircraft’s continuing Airworthiness. Accidents that result from these maintenance activities can be used to assess safety. This research seeks to undertake a preliminary investigation of accidents that have maintenance contributions. An exploratory design was utilized, which commenced with a content analysis of the accidents with maintenance contributions (n = 35) in the official ICAO accident data set (N = 1277), followed by a quantitative ex-post facto study. Results showed that maintenance contributions are involved in 2.8 ± 0.9% of ICAO official accidents. Maintenance accidents were also found to be more likely to have one or more fatalities (20%), compared to all ICAO official accidents (14.7%). The number of accidents with maintenance contributions per year was also found to have reduced over the period of the study; this rate was statistically significantly greater than for all accidents (5%/year, relative to 2%/year). Results showed that Aircraft between 10 and 20 years old were most commonly involved in accidents with maintenance contributions, while Aircraft older than 18 years were more likely to result in a hull loss, and Aircraft older than 34 years were more likely to result in a fatality.
-
A review of human factors causations in Commercial Air Transport accidents and incidents: From to 2000–2016
Progress in Aerospace Sciences, 2018Co-Authors: Husam Kharoufah, John Murray, Glenn Baxter, Graham WildAbstract:Abstract Human factors have been defined by the International Civil Aviation Organization (ICAO) as “about people in their living and working situations; about their relationship with machines, with procedures and with the environment about them; and about their relationships with other people (at work)”. Human factors contribute to approximately 75% of Aircraft accidents and incidents. As such, understanding their influence is essential to improve safety in the aviation industry. This study examined the different human factors causations in a random sample of over 200 Commercial Air Transport accidents and incidents from 2000 to 2016. The main objective of this study was to identify the principal human factor contributions to aviation accidents and incidents. An exploratory research design was utilised. The qualitative data were recorded in a database, and were coded into categories about the flights (including date, manufacturer, carrier, state of occurrence, etc). These categories were then analysed using Chi-Squared tests to determine which were statistically significant in terms of having an influence on the accidents/incidents. The most significant human factor was found to be situational awareness followed by non-adherence to procedures. In addition, charter operations proved to have a significantly higher rate of human factor related occurrence as compared to other type of operations. A significant finding was that Africa has a high rate of accidents/incidents relative to the amount of traffic and Aircraft movements. These findings reflect some of the more noteworthy incidents that have received significant media attention, including Air Asia 8501 on the 28th of December 2014, TransAsia Airways 235 on the 4th of February 2015, and Air France 447 on the 1st of June 2009; these accidents resulted in a significant loss of lives where situational awareness and non-adherence to procedures were significant contributing factors.
-
a review of human factors causations in Commercial Air Transport accidents and incidents from to 2000 2016
Progress in Aerospace Sciences, 2018Co-Authors: Husam Kharoufah, John Murray, Glenn Baxter, Graham WildAbstract:Abstract Human factors have been defined by the International Civil Aviation Organization (ICAO) as “about people in their living and working situations; about their relationship with machines, with procedures and with the environment about them; and about their relationships with other people (at work)”. Human factors contribute to approximately 75% of Aircraft accidents and incidents. As such, understanding their influence is essential to improve safety in the aviation industry. This study examined the different human factors causations in a random sample of over 200 Commercial Air Transport accidents and incidents from 2000 to 2016. The main objective of this study was to identify the principal human factor contributions to aviation accidents and incidents. An exploratory research design was utilised. The qualitative data were recorded in a database, and were coded into categories about the flights (including date, manufacturer, carrier, state of occurrence, etc). These categories were then analysed using Chi-Squared tests to determine which were statistically significant in terms of having an influence on the accidents/incidents. The most significant human factor was found to be situational awareness followed by non-adherence to procedures. In addition, charter operations proved to have a significantly higher rate of human factor related occurrence as compared to other type of operations. A significant finding was that Africa has a high rate of accidents/incidents relative to the amount of traffic and Aircraft movements. These findings reflect some of the more noteworthy incidents that have received significant media attention, including Air Asia 8501 on the 28th of December 2014, TransAsia Airways 235 on the 4th of February 2015, and Air France 447 on the 1st of June 2009; these accidents resulted in a significant loss of lives where situational awareness and non-adherence to procedures were significant contributing factors.
Howard Smith - One of the best experts on this subject based on the ideXlab platform.
-
Review of evolving trends in blended wing body Aircraft design
Progress in Aerospace Sciences, 2015Co-Authors: Paulinus P. C. Okonkwo, Howard SmithAbstract:The desire to produce environmentally friendly Aircraft that is aerodynamically efficient and capable of conveying large number of passengers over long ranges at reduced direct operating cost led Aircraft designers to develop the Blended Wing Body (BWB) Aircraft concept. The BWB Aircraft represents a paradigm shift in the design of Aircraft. The design provides aerodynamics and environmental benefits and is suitable for the integration of advanced systems and concepts like laminar flow technology, jet flaps and distributed propulsion. However, despite these benefits, the BWB is yet to be developed for Commercial Air Transport due to several challenges. This paper reviews emerging trends in BWB Aircraft design highlighting design challenges that have hindered the development of a BWB passenger Transport Aircraft. The study finds that in order to harness the advantages and reduce the deficiencies of a tightly coupled configuration like the BWB, a multidisciplinary design synthesis optimisation should be conducted with good handling and ride quality as objective functions within acceptable direct operating cost and noise bounds.
Talal Ahmad - One of the best experts on this subject based on the ideXlab platform.
-
wi fly widespread opportunistic connectivity via Commercial Air Transport
Hot Topics in Networks, 2017Co-Authors: Talal Ahmad, Ranveer Chandra, Ashish Kapoor, Michael Daum, Eric HorvitzAbstract:More than half of the world's population face barriers in accessing the Internet. A recent ITU study estimates that 2.6 billion people cannot afford connectivity and that 3.8 billion do not have access. Recent proposals for providing low-cost connectivity include fielding of drones and long-lasting balloons in the stratosphere. We propose a more economical alternative, which we refer to as Wi-Fly, that leverages existing Commercial planes to provide Internet connectivity to remote regions. In Wi-Fly we enable communication between a lightweight Wi-Fi device on Commercial planes and ground stations, resulting in connectivity in regions that do not otherwise have low-cost Internet connectivity. Wi-Fly leverages existing ADS-B signals from planes as a control channel to ensure that there is a strong link from the plane to the ground, and that the stations intelligently wake up and associate to the appropriate AP. For our experimentation, we have customized two Airplanes to conduct measurements. Through empirical experiments with test flights and simulations, we show that Wi-Fly and its extensions have the potential to provide connectivity to the most remote regions of the world at a significantly lower cost than existing alternatives.
-
HotNets - Wi-Fly: Widespread Opportunistic Connectivity via Commercial Air Transport
Proceedings of the 16th ACM Workshop on Hot Topics in Networks, 2017Co-Authors: Talal Ahmad, Ranveer Chandra, Ashish Kapoor, Michael Daum, Eric HorvitzAbstract:More than half of the world's population face barriers in accessing the Internet. A recent ITU study estimates that 2.6 billion people cannot afford connectivity and that 3.8 billion do not have access. Recent proposals for providing low-cost connectivity include fielding of drones and long-lasting balloons in the stratosphere. We propose a more economical alternative, which we refer to as Wi-Fly, that leverages existing Commercial planes to provide Internet connectivity to remote regions. In Wi-Fly we enable communication between a lightweight Wi-Fi device on Commercial planes and ground stations, resulting in connectivity in regions that do not otherwise have low-cost Internet connectivity. Wi-Fly leverages existing ADS-B signals from planes as a control channel to ensure that there is a strong link from the plane to the ground, and that the stations intelligently wake up and associate to the appropriate AP. For our experimentation, we have customized two Airplanes to conduct measurements. Through empirical experiments with test flights and simulations, we show that Wi-Fly and its extensions have the potential to provide connectivity to the most remote regions of the world at a significantly lower cost than existing alternatives.