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Articles 1 - 9 of 9
Full-Text Articles in Engineering
High Wind Alerts: A System Created With Observations From The X-Band Teaching And Research Radar, Lauren Warner
High Wind Alerts: A System Created With Observations From The X-Band Teaching And Research Radar, Lauren Warner
The Journal of Purdue Undergraduate Research
Following the August 13, 2011, Indiana State Fair stage collapse tragedy, caused by a wind gust from an approaching thunderstorm, Purdue University enforced a wind speed restriction of 30 mph (13 m s-1) for tents at outdoor events. During these events, volunteers stand outside with handheld anemometers, measuring and reporting when the wind speeds exceed this limit. In this study, we report testing of a new system to automate high-wind alerts based on observations from a Doppler radar, the X-band Teaching and Research Radar (XTRRA), near Purdue’s campus. XTRRA scans over campus at low elevations approximately every 5 minutes. Using …
The Behavior Of Micro Explosive Charge Underwater Explosion Near A Rigid Wall, Kazutaka Kitagawa, Atsushi Abe
The Behavior Of Micro Explosive Charge Underwater Explosion Near A Rigid Wall, Kazutaka Kitagawa, Atsushi Abe
Progress in Scale Modeling, an International Journal
The interactions between an underwater explosion and underwater structures is a research topic related to understanding strong impulsive forces for disaster preparation and prevention. This study is a part of series studying the behavior of underwater explosion bubbles near different boundaries and structures because understanding the boundary phases and the pulsation of bubbles could be a useful predictive tool. Micro explosive underwater explosions were conducted by detonating a very small amount of silver azide; the time evolution and attenuation of effects from the explosion were studied. Both numerical and experimental data were acquired and compared for underwater shock waves, gas …
State And Prospects Of Production And Operation Of Synthetic Woven Belts (Table) For Load-Handling Devices (Hd) In The Republic Of Uzbekistan, Ibrohim Numanovich Abdullaev, Zhamoldin Dzhalalovich Akhmedov, Bakhodir Kushakovich Rakhmanov, Ruzikhon Toyirzhanovna Zhurabaeva
State And Prospects Of Production And Operation Of Synthetic Woven Belts (Table) For Load-Handling Devices (Hd) In The Republic Of Uzbekistan, Ibrohim Numanovich Abdullaev, Zhamoldin Dzhalalovich Akhmedov, Bakhodir Kushakovich Rakhmanov, Ruzikhon Toyirzhanovna Zhurabaeva
Journal of Tashkent Institute of Railway Engineers
In the world, the use of synthetic woven tapes (SWT) is increasing in various areas of life, including in construction. In particular, thanks to the development of production of high-strength synthetic fibers in such developed countries as Russia, USA, Germany, progress has been made in the creation and manufacture of heavy-duty lifting slings from STL, and on this basis to improve ergonomics and safety of installers, the safety of transported goods, the reduction of labor input and material on the load capacity.
Method For Evaluating The Residual Resource Of Long Designs, Sergey Vladimirovich Chizhov, Ulugbek Zabixullayevich Shermuxamedov, Sharofat Shavkatovna Kadirova
Method For Evaluating The Residual Resource Of Long Designs, Sergey Vladimirovich Chizhov, Ulugbek Zabixullayevich Shermuxamedov, Sharofat Shavkatovna Kadirova
Journal of Tashkent Institute of Railway Engineers
The article describes a method for calculating the safety of extended structures, in particular tunnels. The probabilistic approach to solving the problem is analyzed using the reliability of the structure with the probability of failure-free operation and assessment of the residual life of the structure. These characteristics make it possible to predict the residual life of the structure within a time value until the design has exhausted its ultimate state. An assessment of the operational reliability of the structure is carried out by measuring and establishing existing structural defects. Based on the data obtained, an analysis was carried out and …
Empirical Analysis Of Trends In Runway Incursions In The United States From 2001 To 2017, David C. Ison
Empirical Analysis Of Trends In Runway Incursions In The United States From 2001 To 2017, David C. Ison
Journal of Aviation Technology and Engineering
Runway incursions, events in which an aircraft, vehicle, or person is located on a runway surface without authorization, continue to be a constant threat to aviation safety. Previously identified on the ‘‘Most Wanted’’ list of aviation safety issues by the National Transportation Safety Board, the Federal Aviation Administration (FAA) has spent significant amounts of money and effort to address runway incursions. Little empirical evidence has been collected on the effectiveness of such efforts. Moreover, the data that are available provide a confusing landscape of contradicting findings. Some FAA publications claim that runway incursions are decreasing while the evidence provided in …
Covid-19 And Public Transportation: Current Assessment, Prospects, And Research Needs, Alejandro Tirachini, Oded Cats
Covid-19 And Public Transportation: Current Assessment, Prospects, And Research Needs, Alejandro Tirachini, Oded Cats
Journal of Public Transportation
The COVID-19 pandemic poses a great challenge for contemporary public transportation worldwide, resulting from an unprecedented decline in demand and revenue. In this paper, we synthesize the state-of-the-art, up to early June 2020, on key developments regarding public transportation and the COVID-19 pandemic, including the different responses adopted by governments and public transportation agencies around the world, and the research needs pertaining to critical issues that minimize contagion risk in public transportation in the so-called post-lockdown phase. While attempts at adherence to physical distancing (which challenges the very concept of mass public transportation) are looming in several countries, the latest …
Managing Safety Risks In Airline Maintenance Outsourcing, Rajee Olaganathan Dr., Mark Miller Dr., Bettina M. Mrusek Dr.
Managing Safety Risks In Airline Maintenance Outsourcing, Rajee Olaganathan Dr., Mark Miller Dr., Bettina M. Mrusek Dr.
International Journal of Aviation, Aeronautics, and Aerospace
The U.S aviation industry faced severe financial losses after the 9/11 incident. The financial loss that occurred between 2000 and 2009 in the U.S. alone was $54 billion dollars. One of the operational strategies adopted by air carriers to overcome this hurdle was to outsource aircraft maintenance. Initially, this was accomplished in both home and off-shore locations. Unionized labor relations in the US ultimately forced these organizations to outsource to non-unionized labor sources in foreign countries. However, due to the upsurge in accidents and incidents that resulting from maintenance failures, the concept of outsourcing maintenance became a subject of debate …
Risk - A Multi-Layered Approach, Peter S. Neff
Risk - A Multi-Layered Approach, Peter S. Neff
International Journal of Aviation, Aeronautics, and Aerospace
This article discusses the relationship between the mandates to achieve increased operational safety and the application of risk management strategies. That commercial airlines must operate at the highest level of safety is mandated by statute. FAA regulation, 14 CFR part 5, outlines the FAA response to the requirements of ICAO Annex 19, Safety Management, by establishing requirements for certificate holders to develop a Safety Management System with 4 components: (a) Safety Policy; (b) Safety Risk Management; (c) Safety Assurance; and (d) Safety Promotion. Safety is a tangible and intangible element foundational to the successful commercial airline sector. A structured multi-layered …
Analysis Of Runway Incursion Trends: Implications For Cost-Benefit Analysis Of Mitigation Investments, David C. Ison
Analysis Of Runway Incursion Trends: Implications For Cost-Benefit Analysis Of Mitigation Investments, David C. Ison
International Journal of Aviation, Aeronautics, and Aerospace
This causal-comparative and correlation study investigated the costs of runway incursion safety improvements in relation to their effectiveness to assess potential aviation system benefits.Two airports (Los Angeles International and Dallas-Ft. Worth International), which were early adopters of Runway Status Lights (RWSL), a runway incursion technology, were targeted in this analysis. Findings indicated that there were no significant differences in counts or rates of Category A, B, and D incursions at LAX and DFW when comparing the time periods before versus after RWSL installation. Category C counts and rates were found to have increased significantly after RWSL installation. The findings of …