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https://www.readbyqxmd.com/read/28323596/this-month-in-aerospace-medicine-history
#1
(no author information available yet)
No abstract text is available yet for this article.
December 1, 2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28323581/the-asma-and-the-european-congress-of-aerospace-medicine
#2
David P Gradwell
No abstract text is available yet for this article.
December 1, 2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28279249/bylaws-of-the-aerospace-medical-association
#3
(no author information available yet)
No abstract text is available yet for this article.
March 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28268766/an-investigation-of-animal-and-human-bones-for-predicting-probable-location-of-fractures
#4
Irfan Manarvi
Predicting location of fracture in animal and human bones has been a keen area of research for the past few decades. It has been established that it is various types of stress that results into bone failure. Past studies were mostly based on experimental testing of variety of bones with limited accuracy equipment leading to experimental errors. An effort has been made in present research to use latest experimental testing equipment in parallel with some modern techniques and tools such as 3D scanners for creating computer models and Finite Element Analysis (FEA) to conduct structural analysis that could allow unlimited changes in boundary conditions expected to be faced by a bone...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28265194/curvature-metric-and-parametrization-of-origami-tessellations-theory-and-application-to-the-eggbox-pattern
#5
H Nassar, A Lebée, L Monasse
Origami tessellations are particular textured morphing shell structures. Their unique folding and unfolding mechanisms on a local scale aggregate and bring on large changes in shape, curvature and elongation on a global scale. The existence of these global deformation modes allows for origami tessellations to fit non-trivial surfaces thus inspiring applications across a wide range of domains including structural engineering, architectural design and aerospace engineering. The present paper suggests a homogenization-type two-scale asymptotic method which, combined with standard tools from differential geometry of surfaces, yields a macroscopic continuous characterization of the global deformation modes of origami tessellations and other similar periodic pin-jointed trusses...
January 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28260956/in-flight-medical-emergencies-during-airline-operations-a-survey-of-physicians-on-the-incidence-nature-and-available-medical-equipment
#6
Jochen Hinkelbein, Christopher Neuhaus, Lennert Böhm, Steffen Kalina, Stefan Braunecker
BACKGROUND: Data on the incidence of in-flight medical emergencies on-board civil aircraft are uncommon and rarely published. Such data could provide information regarding required medical equipment on-board aircraft and requisite training for cabin crew. The aim of the present study was to gather data on the incidences, nature, and medical equipment for in-flight medical emergencies by way of a survey of physician members of a German aerospace medical society. MATERIALS AND METHODS: Using unipark...
2017: Open Access Emergency Medicine: OAEM
https://www.readbyqxmd.com/read/28226955/an-investigation-of-animal-and-human-bones-for-predicting-probable-location-of-fractures
#7
Irfan Manarvi, Irfan Manarvi, Irfan Manarvi
Predicting location of fracture in animal and human bones has been a keen area of research for the past few decades. It has been established that it is various types of stress that results into bone failure. Past studies were mostly based on experimental testing of variety of bones with limited accuracy equipment leading to experimental errors. An effort has been made in present research to use latest experimental testing equipment in parallel with some modern techniques and tools such as 3D scanners for creating computer models and Finite Element Analysis (FEA) to conduct structural analysis that could allow unlimited changes in boundary conditions expected to be faced by a bone...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28216729/aerospace-dermatology
#8
Gp Capt Sandeep Arora
Evolutionarily, man is a terrestrial mammal, adapted to land. Aviation and now space/microgravity environment, hence, pose new challenges to our physiology. Exposure to these changes affects the human body in acute and chronic settings. Since skin reflects our mental and physical well-being, any change/side effects of this environment shall be detected on the skin. Aerospace industry offers a unique environment with a blend of all possible occupational disorders, encompassing all systems of the body, particularly the skin...
January 2017: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/28206820/tolerance-to-x-rays-and-heavy-ions-fe-he-in-the-tardigrade-richtersius-coronifer-and-the-bdelloid-rotifer-mniobia-russeola
#9
K Ingemar Jönsson, Andrzej Wojcik
The aim of this study was to analyze tolerance to heavy ions in desiccated animals of the eutardigrade Richtersius coronifer and the bdelloid rotifer Mniobia russeola within the STARLIFE project. Both species were exposed to iron (Fe) and helium (He) ions at the Heavy Ion Medical Accelerator in Chiba (HIMAC) in Chiba, Japan, and to X-rays at the German Aerospace Center (DLR) in Cologne, Germany. Results show no effect of Fe and He on viability up to 7 days post-rehydration in both R. coronifer and M. russeola, while X-rays tended to reduce viability in R...
February 2017: Astrobiology
https://www.readbyqxmd.com/read/28198840/laboratory-simulation-of-laser-propagation-through-plasma-sheaths-containing-ablation-particles-of-zrb-sub-2-sub-sic-c-during-hypersonic-flight
#10
Qing Zang, Xiangxing Bai, Ping Ma, Jie Huang, Jing Ma, Siyuan Yu, Hongyan Shi, Xiudong Sun, Yang Liu, Yueguang Lu
The optical communication method has potential for solving the blackout problem, which is a big challenge faced in the development of aerospace. Two laser transmission systems were set up to explore the influence of the plasma and the ablation particles on the propagation of the laser. The experimental results indicate that the laser can transmit through the plasma with little attenuation. When there are ablation particles of ZrB<sub>2</sub>-SiC-C added in the plasma, the intensity of the laser has fluctuations...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28186727/controlled-synthesis-of-ultralong-carbon-nanotubes-with-perfect-structures-and-extraordinary-properties
#11
Rufan Zhang, Yingying Zhang, Fei Wei
Carbon nanotubes (CNTs) have drawn intensive research interest in the past 25 years due to their excellent properties and wide applications. Ultralong CNTs refers to the horizontally aligned CNT arrays which are usually grown on flat substrates, parallel with each other with large intertube distances. They usually have perfect structures, excellent properties, and lengths up to centimeters, even decimeters. Ultralong CNTs are promising candidates as building blocks for transparent displays, nanoelectronics, superstrong tethers, aeronautics and aerospace materials, etc...
February 10, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28185235/impact-of-a-simulated-gravity-load-for-atmospheric-reentry-10%C3%A2-g-for-2%C3%A2-min-on-conscious-mice
#12
Hironobu Morita, Aoi Yamaguchi, Dai Shiba, Masaki Shirakawa, Satoru Takahashi
The Japan Aerospace Exploration Agency recently performed a mouse experiment in the International Space Station in which mice were raised for 35 days, retrieved using the Dragon spacecraft, and then harvested for analysis 2 days after splashdown. However, the impact of the retrieval procedure, which exposed mice to 5-10 g for 2 min during atmospheric reentry and splashdown, was unknown. Therefore, the purpose of this study was to examine the impact of a 10 g load for 2 min (using a gondola-type centrifuge with a 1...
February 9, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28167315/modeling-of-un-deformed-chip-thickness-in-rum-process-and-study-of-size-effects-in-%C3%AE-rum
#13
Anil Kumar Jain, Pulak M Pandey
Un-deformed chip thickness is a critical parameter in machining processes. Measuring un-deformed chip thickness experimentally is a complicated process, especially in micro machining and may not even be measured accurately. The un-deformed chip thickness has an influence on material removal rate, cutting forces, specific energy and surface finish etc. In ceramic machining, it is also an indication of material removal mode such as ductile or brittle fracture. In the present study, an effort is made to model undeformed chip thickness, cutting forces and specific cutting energy in rotary ultrasonic machining (RUM) applied to the side milling operation...
January 23, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28155328/advanced-laser-based-techniques-for-gas-phase-diagnostics-in-combustion-and-aerospace-engineering
#14
Andreas Ehn, Jiajian Zhu, Xuesong Li, Johannes Kiefer
Gaining information of species, temperature, and velocity distributions in turbulent combustion and high-speed reactive flows is challenging, particularly for conducting measurements without influencing the experimental object itself. The use of optical and spectroscopic techniques, and in particular laser-based diagnostics, has shown outstanding abilities for performing non-intrusive in situ diagnostics. The development of instrumentation, such as robust lasers with high pulse energy, ultra-short pulse duration, and high repetition rate along with digitized cameras exhibiting high sensitivity, large dynamic range, and frame rates on the order of MHz, has opened up for temporally and spatially resolved volumetric measurements of extreme dynamics and complexities...
March 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28155272/flexible-dielectric-nanocomposites-with-ultrawide-zero-temperature-coefficient-windows-for-electrical-energy-storage-and-conversion-under-extreme-conditions
#15
Khurram Shehzad, Yang Xu, Chao Gao, Hanying Li, Zhi-Min Dang, Tawfique Hasan, Jack Luo, Xiangfeng Duan
Polymer dielectrics offer key advantages over their ceramic counterparts such as flexibility, scalability, low cost, and high breakdown voltages. However, a major drawback that limits more widespread application of polymer dielectrics is their temperature-dependent dielectric properties. Achieving dielectric constants with low/zero-temperature coefficient (L/0TC) over a broad temperature range is essential for applications in diverse technologies. Here, we report a hybrid filler strategy to produce polymer composites with an ultrawide L/0TC window of dielectric constant, as well as a significantly enhanced dielectric value, maximum energy storage density, thermal conductivity, and stability...
March 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28154775/three-dimensional-printing-review-of-application-in-medicine-and-hepatic-surgery
#16
Rui Yao, Gang Xu, Shuang-Shuang Mao, Hua-Yu Yang, Xin-Ting Sang, Wei Sun, Yi-Lei Mao
Three-dimensional (3D) printing (3DP) is a rapid prototyping technology that has gained increasing recognition in many different fields. Inherent accuracy and low-cost property enable applicability of 3DP in many areas, such as manufacturing, aerospace, medical, and industrial design. Recently, 3DP has gained considerable attention in the medical field. The image data can be quickly turned into physical objects by using 3DP technology. These objects are being used across a variety of surgical specialties. The shortage of cadaver specimens is a major problem in medical education...
December 2016: Cancer Biology & Medicine
https://www.readbyqxmd.com/read/28151691/starlife-an-international-campaign-to-study-the-role-of-galactic-cosmic-radiation-in-astrobiological-model-systems
#17
Ralf Moeller, Marina Raguse, Stefan Leuko, Thomas Berger, Christine Elisabeth Hellweg, Akira Fujimori, Ryuichi Okayasu, Gerda Horneck
In-depth knowledge regarding the biological effects of the radiation field in space is required for assessing the radiation risks in space. To obtain this knowledge, a set of different astrobiological model systems has been studied within the STARLIFE radiation campaign during six irradiation campaigns (2013-2015). The STARLIFE group is an international consortium with the aim to investigate the responses of different astrobiological model systems to the different types of ionizing radiation (X-rays, γ rays, heavy ions) representing major parts of the galactic cosmic radiation spectrum...
February 2, 2017: Astrobiology
https://www.readbyqxmd.com/read/28147584/the-symmetry-and-coupling-properties-of-solutions-in-general-anisotropic-multilayer-waveguides
#18
F Hernando Quintanilla, M J S Lowe, R V Craster
Multilayered plate and shell structures play an important role in many engineering settings where, for instance, coated pipes are commonplace such as in the petrochemical, aerospace, and power generation industries. There are numerous demands, and indeed requirements, on nondestructive evaluation (NDE) to detect defects or to measure material properties using guided waves; to choose the most suitable inspection approach, it is essential to know the properties of the guided wave solutions for any given multilayered system and this requires dispersion curves computed reliably, robustly, and accurately...
January 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28145484/complexion-mediated-martensitic-phase-transformation-in-titanium
#19
J Zhang, C C Tasan, M J Lai, A-C Dippel, D Raabe
The most efficient way to tune microstructures and mechanical properties of metallic alloys lies in designing and using athermal phase transformations. Examples are shape memory alloys and high strength steels, which together stand for 1,500 million tons annual production. In these materials, martensite formation and mechanical twinning are tuned via composition adjustment for realizing complex microstructures and beneficial mechanical properties. Here we report a new phase transformation that has the potential to widen the application window of Ti alloys, the most important structural material in aerospace design, by nanostructuring them via complexion-mediated transformation...
February 1, 2017: Nature Communications
https://www.readbyqxmd.com/read/28125236/nanocrystalline-high-entropy-alloys-a-new-paradigm-in-high-temperature-strength-and-stability
#20
Yu Zou, Jeffrey M Wheeler, Huan Ma, Philipp Okle, Ralph Spolenak
Metals with nanometer-scale grains or nanocrystalline metals exhibit high strengths at ambient conditions, yet their strengths substantially decrease with increasing temperature, rendering them unsuitable for usage at high temperatures. Here, we show that a nanocrystalline high-entropy alloy (HEA) retains an extraordinarily high yield strength over 5 GPa up to 600 °C, 1 order of magnitude higher than that of its coarse-grained form and 5 times higher than that of its single-crystalline equivalent. As a result, such nanostructured HEAs reveal strengthening figures of merit-normalized strength by the shear modulus above 1/50 and strength-to-density ratios above 0...
March 8, 2017: Nano Letters
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