The Experts below are selected from a list of 2637 Experts worldwide ranked by ideXlab platform
Glenn R Paskoff - One of the best experts on this subject based on the ideXlab platform.
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Gender-Related Spinal Injury Assessment Consideration in Military Aviation Occupant Protection
2001Co-Authors: P E Whitley, Glenn R PaskoffAbstract:Abstract : In determining the risk of injury in the Military Aviation environment, a male and female of similar height and weight have been assumed to have the same risk of vertebral injury during an escape or crash scenario. A Quantitative Computed Tomography study has been performed to analytically quantify the vertebral strength properties between men and women for C5, T12, and L4. Significant differences were found between bone mineral density (BMD) by gender at C5 and vertebral dimension parameters at all locations by gender. The cross-sectional area and BMD product, a measure of compressive strength, was significantly different for only C5 by gender. Predicted strength based on the area-density product was not different by location or gender but when predicted by area, age, gender, location, and structure was significantly lower for females at L4. Using multiple and response surface regression, anthropometrical measures predicted BMD for males at T12 and L4; cross-sectional area for females at L4 and males at C5; and area-density product at all locations for both genders. Given the lack of significant difference in area-density product at T12 and L4 by gender, males and females that fall within the parameters of this study group would appear to be at the same risk of vertebral compressive injury. Using the same arguments for C5, females demonstrated a 13% decrease in area-density product and would likely be at a greater risk for compressive injury than males. However, whether a relationship exists between the C5 area-density product and C5 compressive strength is not known.
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gender related spinal injury assessment considerations in Military Aviation occupant protection modelling
International Journal of Crashworthiness, 2001Co-Authors: P E Whitley, Glenn R PaskoffAbstract:Abstract In determining the risk of injury in the Military Aviation environment, a male and female of similar height and weight have been assumed to have the same risk of vertebral injury during an escape or crash scenario. A Quantitative Computed Tomography (QCT) study has been performed to analytically quantify the vertebral strength properties between men and women for C5, T12 and L4. Significant differences were found between bone mineral density (BMD) by gender at C5 and vertebral dimension parameters at all locations by gender. The cross sectional area and BMD product, a measure of compressive strength, was significantly different for only C5 by gender. Predicted strength based on the area-density product was not different by location or gender but when predicted by area, age, gender, location and structure was significantly lower for females at L4. Using multiple and response surface regression, anthropometrical measures predicted BMD for males at T12 and L4; cross sectional area for females at L4 ...
Eric A. Lindgren - One of the best experts on this subject based on the ideXlab platform.
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SHM reliability and implementation – A personal Military Aviation perspective
2016Co-Authors: Eric A. LindgrenAbstract:Structural Health Monitoring has been proposed as a solution to address the needs of Military Aviation to reduce the time and cost to perform nondestructive inspections. While the potential to realize significant benefits exist, there are considerations that have to be addressed before such systems can be integrated into Military platforms. Some considerations are pervasive to all Aviation, such as how to assess the reliability and reproducible capability of these systems. However, there are other challenges unique to Military Aviation that must be overcome before these types of systems can be used. This presentation and paper are intended as a complement to the review of the outcome of the SAE G-11 SHM committee special workshop on SHM reliability in April of 2015. It will address challenges unique to Military Aviation that stem from different approaches to managing structural integrity (i.e. safety), frequency of use, design differences, various maintenance practices, and additional descriptions address...
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shm reliability and implementation a personal Military Aviation perspective
42ND ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Incorporating the 6th European-American Workshop on Reliability of NDE, 2016Co-Authors: Eric A. LindgrenAbstract:Structural Health Monitoring has been proposed as a solution to address the needs of Military Aviation to reduce the time and cost to perform nondestructive inspections. While the potential to realize significant benefits exist, there are considerations that have to be addressed before such systems can be integrated into Military platforms. Some considerations are pervasive to all Aviation, such as how to assess the reliability and reproducible capability of these systems. However, there are other challenges unique to Military Aviation that must be overcome before these types of systems can be used. This presentation and paper are intended as a complement to the review of the outcome of the SAE G-11 SHM committee special workshop on SHM reliability in April of 2015. It will address challenges unique to Military Aviation that stem from different approaches to managing structural integrity (i.e. safety), frequency of use, design differences, various maintenance practices, and additional descriptions address...
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SHM Reliability and Implementation Overview—A Personal Military Aviation Perspective
Structural Health Monitoring-an International Journal, 2015Co-Authors: Eric A. LindgrenAbstract:Structural Health Monitoring has been proposed as a solution to address the needs of Military Aviation to reduce the time and cost to perform nondestructive inspections. While the potential to realize significant benefits exist, there are considerations that have to be addressed before such systems can be integrated into Military platforms. Some considerations are pervasive to all Aviation, such as how to assess the reliability and reproducible capability of these systems. However, there are other challenges unique to Military Aviation that must be overcome before these types of systems can be used. This presentation and paper are intended as a complement to the review of the outcome of the SAE G-11 SHM committee special workshop on SHM reliability in April of 2015. It will address challenges unique to Military Aviation that stem from different approaches to managing structural integrity (i.e. safety), frequency of use, design differences, various maintenance practices, and additional descriptions addressing differences in the execution of inspections. The objective of this presentation is to improve the awareness of the research and development community to the different and unique requirements found in Military Aviation, including the differences between countries, services, and aircraft type. This information should assist the research and development community in identifying and attacking key challenges. It is not intended to be comprehensive overview of all stakeholders’ perspectives, but to serve as a launch point for additional discussion and exploration of opportunities to realize the potential of Structural Health Monitoring to assist in the management of Military Aviation assets. doi: 10.12783/SHM2015/333
P E Whitley - One of the best experts on this subject based on the ideXlab platform.
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Gender-Related Spinal Injury Assessment Consideration in Military Aviation Occupant Protection
2001Co-Authors: P E Whitley, Glenn R PaskoffAbstract:Abstract : In determining the risk of injury in the Military Aviation environment, a male and female of similar height and weight have been assumed to have the same risk of vertebral injury during an escape or crash scenario. A Quantitative Computed Tomography study has been performed to analytically quantify the vertebral strength properties between men and women for C5, T12, and L4. Significant differences were found between bone mineral density (BMD) by gender at C5 and vertebral dimension parameters at all locations by gender. The cross-sectional area and BMD product, a measure of compressive strength, was significantly different for only C5 by gender. Predicted strength based on the area-density product was not different by location or gender but when predicted by area, age, gender, location, and structure was significantly lower for females at L4. Using multiple and response surface regression, anthropometrical measures predicted BMD for males at T12 and L4; cross-sectional area for females at L4 and males at C5; and area-density product at all locations for both genders. Given the lack of significant difference in area-density product at T12 and L4 by gender, males and females that fall within the parameters of this study group would appear to be at the same risk of vertebral compressive injury. Using the same arguments for C5, females demonstrated a 13% decrease in area-density product and would likely be at a greater risk for compressive injury than males. However, whether a relationship exists between the C5 area-density product and C5 compressive strength is not known.
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gender related spinal injury assessment considerations in Military Aviation occupant protection modelling
International Journal of Crashworthiness, 2001Co-Authors: P E Whitley, Glenn R PaskoffAbstract:Abstract In determining the risk of injury in the Military Aviation environment, a male and female of similar height and weight have been assumed to have the same risk of vertebral injury during an escape or crash scenario. A Quantitative Computed Tomography (QCT) study has been performed to analytically quantify the vertebral strength properties between men and women for C5, T12 and L4. Significant differences were found between bone mineral density (BMD) by gender at C5 and vertebral dimension parameters at all locations by gender. The cross sectional area and BMD product, a measure of compressive strength, was significantly different for only C5 by gender. Predicted strength based on the area-density product was not different by location or gender but when predicted by area, age, gender, location and structure was significantly lower for females at L4. Using multiple and response surface regression, anthropometrical measures predicted BMD for males at T12 and L4; cross sectional area for females at L4 ...
F.h. Sykes - One of the best experts on this subject based on the ideXlab platform.
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Military Aviation
Aeronautical journal (London England : 1897), 2020Co-Authors: F.h. SykesAbstract:Sir John, Ladies and Gentlemen,—When, a few days ago, I had finished the notes for this evening, I rather wondered which portion of me, if any, you would kindly allow, to leave this room. You will, I am afraid, tell me it is not a lecture on Military Aviation at all, that—but I will not take the words out of your mouth. My excuse is that the words "Military" and "Aviation" are each so large and lead in such innumerable directions. It is difficult to obtain a correct perspective of the combination. I must rely upon the usual hope of the diffident speaker and say how desirous I am that my efforts may at all events lead to a brilliant and illuminating discussion.
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Further Developments of Military Aviation
Aeronautical Journal, 2020Co-Authors: F.h. SykesAbstract:Last year the Aëronautical Society kindly asked me to give my views on Military Aviation. I then tried to show the objects for which Military aircraft would be used, the results likely to be gained, and the general lines upon which it was expected that progress would take place—in a word, the Military aspect of Aviation. Airships have now been handed over to the Naval Wing of the Royal Flying Corps and I propose to–night to deal almost entirely with aeroplane work, in the light of a year's progress. I make no excuse for reiterating the strong links which I feel bind soldier, sailor, designer and aircraft constructor in this matter. Rapidity of progress is essential and it can only be gained by cohesion of effort, lack of friction, and mutual understanding. The Service must remember that the aeroplane designer has to live and is not always merely chasing “X” with a slide rule; the constructor, that the soldier is not only pipe–clay and red tape and that there is sometimes method in his madness.
Seyfi Polat - One of the best experts on this subject based on the ideXlab platform.
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experimental examination of the effects of Military Aviation fuel jp 8 and biodiesel fuel blends on the engine performance exhaust emissions and combustion in a direct injection engine
Fuel Processing Technology, 2014Co-Authors: Ahmet Uyumaz, Hamit Solmaz, Emre Yilmaz, Hasan Yamik, Seyfi PolatAbstract:Abstract Biodiesels are the most popular fuels which can be used as an alternative fuel instead of diesel fuel in diesel engines. Low emission characteristics and high cetane numbers are the most significant advantages of biodiesels. However, JP-8 Military Aviation fuel which is a kerosene based fuel has a low viscosity, high lower heating value and very low freezing point. The usage of the fuel blends of biodiesel and JP-8 may be effective in improving the characteristics of biodiesel. In this study, JP-8 Aviation fuel and sunflower methyl ester blends were tested at 7.5, 11.25, 15 and 18.75 Nm engine loads and at maximum torque speed (2200 min − 1 ) in a single cylinder, naturally aspirated, and direct injection diesel engine. In-cylinder pressure, ignition delay period, engine performance and exhaust emissions have been examined. As the engine load increases the specific fuel consumptions decrease for all test fuels. It was seen that NO x emissions increased with the increase of the amount of biodiesel in the test fuels. CO emissions decreased as the amount of biodiesel fuel increased in the test fuels. Consequently, it was observed that JP-8 and biodiesel fuel mixtures can easily and efficiently be used in diesel engine.
