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https://www.readbyqxmd.com/read/27907237/tricyclic-antidepressants-found-in-pilots-fatally-injured-in-civil-aviation-accidents
#1
Zeki Dulkadir, Arvind K Chaturvedi, Kristi J Craft, Jeffery S Hickerson, Kacey D Cliburn
Prevalence of tricyclic antidepressants (TCAs) has not been explored in pilots. The National Transportation Safety Board (NTSB) aviation accident and the Federal Aviation Administration's Civil Aerospace Medical Institute (CAMI) toxicology and medical certification databases were searched for pilots fatally injured in aviation accidents. During 1990-2012, CAMI received bio-samples of pilots from 7037 aviation accidents. Of these, 2644 cases were positive for drugs. TCAs were present in 31. TCA blood concentrations ranged from therapeutic to toxic levels...
December 1, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/27901267/binge-alcohol-intake-after-hypergravity-stress-sustainably-decreases-ampk-and-transcription-factors-necessary-for-hepatocyte-survival
#2
Sang Gil Lee, Hong Min Wu, Chan Gyu Lee, Choong Sik Oh, So Won Chung, Sang Geon Kim
BACKGROUND: Binge alcohol consumption elicits mitochondrial dysfunction in hepatocytes. An understanding of the effect of ethanol (EtOH) exposure after hypergravity stress on liver function may assist in the implementation of pathophysiological countermeasures for aerospace missions. This study investigated whether a combination of hypergravity stress and binge alcohol intake has a detrimental effect on AMP-activated protein kinase (AMPK) and other molecules necessary for hepatocyte survival...
November 30, 2016: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/27888933/review-on-modeling-heat-transfer-and-thermoregulatory-responses-in-human-body
#3
REVIEW
Ming Fu, Wenguo Weng, Weiwang Chen, Na Luo
Several mathematical models of human thermoregulation have been developed, contributing to a deep understanding of thermal responses in different thermal conditions and applications. In these models, the human body is represented by two interacting systems of thermoregulation: the controlling active system and the controlled passive system. This paper reviews the recent research of human thermoregulation models. The accuracy and scope of the thermal models are improved, for the consideration of individual differences, integration to clothing models, exposure to cold and hot conditions, and the changes of physiological responses for the elders...
December 2016: Journal of Thermal Biology
https://www.readbyqxmd.com/read/27876858/multi-functional-carbon-fibre-composites-using-carbon-nanotubes-as-an-alternative-to-polymer-sizing
#4
T R Pozegic, J V Anguita, I Hamerton, K D G I Jayawardena, J-S Chen, V Stolojan, P Ballocchi, R Walsh, S R P Silva
Carbon fibre reinforced polymers (CFRP) were introduced to the aerospace, automobile and civil engineering industries for their high strength and low weight. A key feature of CFRP is the polymer sizing - a coating applied to the surface of the carbon fibres to assist handling, improve the interfacial adhesion between fibre and polymer matrix and allow this matrix to wet-out the carbon fibres. In this paper, we introduce an alternative material to the polymer sizing, namely carbon nanotubes (CNTs) on the carbon fibres, which in addition imparts electrical and thermal functionality...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27857280/micro-optoelectromechanical-systems-accelerometer-based-on-intensity-modulation-using-a-one-dimensional-photonic-crystal
#5
Arash Sheikhaleh, Kambiz Abedi, Kian Jafari, Reza Gholamzadeh
In this paper, we propose what we believe is a novel sensitive micro-optoelectromechanical systems (MOEMS) accelerometer based on intensity modulation by using a one-dimensional photonic crystal. The optical sensing system of the proposed structure includes an air-dielectric multilayer photonic bandgap material, a laser diode (LD) light source, a typical photodiode (1550 nm) and a set of integrated optical waveguides. The proposed sensor provides several advantages, such as a relatively wide measurement range, good linearity in the whole measurement range, integration capability, negligible cross-axis sensitivity, high reliability, and low air-damping coefficient, which results in a wider frequency bandwidth for a fixed resonance frequency...
November 10, 2016: Applied Optics
https://www.readbyqxmd.com/read/27827904/an-soi-cmos-based-multi-sensor-mems-chip-for-fluidic-applications
#6
Mohtashim Mansoor, Ibraheem Haneef, Suhail Akhtar, Muhammad Aftab Rafiq, Andrea De Luca, Syed Zeeshan Ali, Florin Udrea
An SOI CMOS multi-sensor MEMS chip, which can simultaneously measure temperature, pressure and flow rate, has been reported. The multi-sensor chip has been designed keeping in view the requirements of researchers interested in experimental fluid dynamics. The chip contains ten thermodiodes (temperature sensors), a piezoresistive-type pressure sensor and nine hot film-based flow rate sensors fabricated within the oxide layer of the SOI wafers. The silicon dioxide layers with embedded sensors are relieved from the substrate as membranes with the help of a single DRIE step after chip fabrication from a commercial CMOS foundry...
November 4, 2016: Sensors
https://www.readbyqxmd.com/read/27809503/biobased-amines-from-synthesis-to-polymers-present-and-future
#7
Vincent Froidevaux, Claire Negrell, Sylvain Caillol, Jean-Pierre Pascault, Bernard Boutevin
Amines are key intermediates in the chemical industry due to their nucleophilic characteristic which confers a high reactivity to them. Thus, they are key monomers for the synthesis of polyamides, polyureas, polyepoxydes, which are all of growing interest in automotive, aerospace, building, or health applications. Despite a growing interest for biobased monomers and polymers, and particularly polyamides, it should be noticed that very few natural amines are available. Actually, there is only chitosan and poly(lysine)...
November 3, 2016: Chemical Reviews
https://www.readbyqxmd.com/read/27785150/applications-of-3d-printing-in-healthcare
#8
Helena Dodziuk
3D printing is a relatively new, rapidly expanding method of manufacturing that found numerous applications in healthcare, automotive, aerospace and defense industries and in many other areas. In this review, applications in medicine that are revolutionizing the way surgeries are carried out, disrupting prosthesis and implant markets as well as dentistry will be presented. The relatively new field of bioprinting, that is printing with cells, will also be briefly discussed.
September 2016: Kardiochirurgia i Torakochirurgia Polska, Polish Journal of Cardio-Thoracic Surgery
https://www.readbyqxmd.com/read/27783054/geometric-calibration-and-validation-of-kompsat-3a-aeiss-a-camera
#9
Doocheon Seo, Jaehong Oh, Changno Lee, Donghan Lee, Haejin Choi
Kompsat-3A, which was launched on 25 March 2015, is a sister spacecraft of the Kompsat-3 developed by the Korea Aerospace Research Institute (KARI). Kompsat-3A's AEISS-A (Advanced Electronic Image Scanning System-A) camera is similar to Kompsat-3's AEISS but it was designed to provide PAN (Panchromatic) resolution of 0.55 m, MS (multispectral) resolution of 2.20 m, and TIR (thermal infrared) at 5.5 m resolution. In this paper we present the geometric calibration and validation work of Kompsat-3A that was completed last year...
October 24, 2016: Sensors
https://www.readbyqxmd.com/read/27779961/this-month-in-aerospace-medicine-history
#10
(no author information available yet)
No abstract text is available yet for this article.
2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/27779959/development-of-a-geographic-information-system-for-risk-informed-decision-making-in-aerospace-medicine
#11
Lawrence Paskoff
No abstract text is available yet for this article.
2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/27748379/enhanced-flexural-wave-sensing-by-adaptive-gradient-index-metamaterials
#12
Y Y Chen, R Zhu, M V Barnhart, G L Huang
Increasing sensitivity and signal to noise ratios of conventional wave sensors is an interesting topic in structural health monitoring, medical imaging, aerospace and nuclear instrumentation. Here, we report the concept of a gradient piezoelectric self-sensing system by integrating shunting circuitry into conventional sensors. By tuning circuit elements properly, both the quality and quantity of the flexural wave measurement data can be significantly increased for new adaptive sensing applications. Through analytical, numerical and experimental studies, we demonstrate that a metamaterial-based sensing system (MBSS) with gradient bending stiffness can be designed by connecting gradient negative capacitance circuits to an array of piezoelectric patches (sensors)...
October 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27681728/strain-modal-analysis-of-small-and-light-pipes-using-distributed-fibre-bragg-grating-sensors
#13
Jun Huang, Zude Zhou, Lin Zhang, Juntao Chen, Chunqian Ji, Duc Truong Pham
Vibration fatigue failure is a critical problem of hydraulic pipes under severe working conditions. Strain modal testing of small and light pipes is a good option for dynamic characteristic evaluation, structural health monitoring and damage identification. Unique features such as small size, light weight, and high multiplexing capability enable Fibre Bragg Grating (FBG) sensors to measure structural dynamic responses where sensor size and placement are critical. In this paper, experimental strain modal analysis of pipes using distributed FBG sensors ispresented...
2016: Sensors
https://www.readbyqxmd.com/read/27668827/confined-chemical-etching-for-electrochemical-machining-with-nanoscale-accuracy
#14
Dongping Zhan, Lianhuan Han, Jie Zhang, Kang Shi, Jian-Zhang Zhou, Zhao-Wu Tian, Zhong-Qun Tian
In the past several decades, electrochemical machining (ECM) has enjoyed the reputation of a powerful technique in the manufacturing industry. Conventional ECM methods can be classified as electrolytic machining and electroforming: the former is based on anodic dissolution and the latter is based on cathodic deposition of metallic materials. Strikingly, ECM possesses several advantages over mechanical machining, such as high removal rate, the capability of making complex three-dimensional structures, and the practicability for difficult-to-cut materials...
September 26, 2016: Accounts of Chemical Research
https://www.readbyqxmd.com/read/27662786/the-effects-of-short-term-hypergravity-on-caenorhabditis-elegans
#15
Jenifer N Saldanha, Santosh Pandey, Jo Anne Powell-Coffman
As we seek to recognize the opportunities of advanced aerospace technologies and spaceflight, it is increasingly important to understand the impacts of hypergravity, defined as gravitational forces greater than those present on the earth's surface. The nematode Caenorhabditis elegans has been established as a powerful model to study the effects of altered gravity regimens and has displayed remarkable resilience to space travel. In this study, we investigate the effects of short-term and defined hypergravity exposure on C...
August 2016: Life Sciences in Space Research
https://www.readbyqxmd.com/read/27662357/this-month-in-aerospace-medicine-history
#16
(no author information available yet)
No abstract text is available yet for this article.
2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/27662355/fighter-pilot-with-recurrent-central-serous-chorioretinopathy
#17
Kevin C Dietrich
BACKGROUND: Central serous chorioretinopathy (CSC) is usually a self-limiting condition; however, there is potential for recurrence and permanent visual defects. Aviation demands perfect vision to minimize risk to pilots and aircraft. Consequently, this ailment disqualifies pilots and pilots to be. CASE REPORT: A fully trained fighter pilot with 1260 h in fighter airframes has been contending with central serous chorioretinopathy in the right eye over the course of 3 yr...
2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/27662351/screening-and-mitigation-of-layperson-anxiety-in-aerospace-environments
#18
Robert A Mulcahy, Rebecca S Blue, Johnené L Vardiman, Tarah L Castleberry, James M Vanderploeg
INTRODUCTION: Anxiety may present challenges for commercial spaceflight operations, as little is known regarding the psychological effects of spaceflight on laypersons. A recent investigation evaluated measures of anxiety during centrifuge-simulated suborbital commercial spaceflight, highlighting the potential for severe anxiousness to interrupt spaceflight operations. METHODS: To pave the way for future research, an extensive literature review identified existing knowledge that may contribute to formation of interventions for anxiety in commercial spaceflight...
2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/27650254/a-novel-method-based-on-selective-laser-sintering-for-preparing-high-performance-carbon-fibres-polyamide12-epoxy-ternary-composites
#19
Wei Zhu, Chunze Yan, Yunsong Shi, Shifeng Wen, Jie Liu, Qingsong Wei, Yusheng Shi
A novel method based on selective laser sintering (SLS) process is proposed for the first time to prepare complex and high-performance carbon fibres/polyamide12/epoxy (CF/PA12/EP) ternary composites. The procedures are briefly described as follows: prepare polyamide12 (PA12) coated carbon fibre (CF) composite powder; build porous green parts by SLS; infiltrate the green parts with high-performance thermosetting epoxy (EP) resin; and finally cure the resin at high temperature. The obtained composites are a ternary composite system consisting of the matrix of novolac EP resin, the reinforcement of CFs and the transition thin layer of PA12 with a thickness of 595 nm...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27647908/mechanism-and-energetics-of-%C3%A3-c-a%C3%A3-dislocation-cross-slip-in-hcp-metals
#20
Zhaoxuan Wu, W A Curtin
Hexagonal close-packed (hcp) metals such as Mg, Ti, and Zr are lightweight and/or durable metals with critical structural applications in the automotive (Mg), aerospace (Ti), and nuclear (Zr) industries. The hcp structure, however, brings significant complications in the mechanisms of plastic deformation, strengthening, and ductility, and these complications pose significant challenges in advancing the science and engineering of these metals. In hcp metals, generalized plasticity requires the activation of slip on pyramidal planes, but the structure, motion, and cross-slip of the associated [Formula: see text] dislocations are not well established even though they determine ductility and influence strengthening...
October 4, 2016: Proceedings of the National Academy of Sciences of the United States of America
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