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https://www.readbyqxmd.com/read/27907259/spectral-diversity-area-relationships-for-assessing-biodiversity-in-a%C3%A2-wildland-agriculture-matrix
#1
Kyla Marie Dahlin
Species-area relationships have long been used to assess patterns of species diversity across scales. Here, this concept is extended to spectral diversity using hyperspectral data collected by NASA's Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) over western Michigan. This mixture of mesic forest and agricultural lands offers two end-points on the local-scale diversity continuum; one set of well-mixed forest patches and one set of highly homogeneous agricultural patches. Using the sum of the first three principal component values and the principal components' convex hull volume, spectral diversity was compared within and among these plots and to null expectations for perfectly random and perfectly patchy landscapes...
December 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27901222/workload-and-associated-factors-a-study-in-maritime-port-in-brazil
#2
Marta Regina Cezar-Vaz, Clarice Alves Bonow, Marlise Capa Verde de Almeida, Cynthia Fontella Sant'Anna, Leticia Silveira Cardoso
Objective: to identify the effect of the mental, physical, temporal, performance, total effort and frustration demands in the overall workload, and in the same way analyze the global burden of port labor and associated factors that contribute most to their decrease or increase. Method: a cross-sectional, quantitative study, developed with 232 dock workers. For data collection, a structured questionnaire with descriptive, occupational, smoking and illicit drug use variables was applied, as well as variables on the load on the tasks undertaken at work, based on the questionnaire NASA Task Load Index...
November 28, 2016: Revista Latino-americana de Enfermagem
https://www.readbyqxmd.com/read/27881169/spatiotemporal-exposure-modeling-of-ambient-erythemal-ultraviolet-radiation
#3
Trang VoPham, Jaime E Hart, Kimberly A Bertrand, Zhibin Sun, Rulla M Tamimi, Francine Laden
BACKGROUND: Ultraviolet B (UV-B) radiation plays a multifaceted role in human health, inducing DNA damage and representing the primary source of vitamin D for most humans; however, current U.S. UV exposure models are limited in spatial, temporal, and/or spectral resolution. Area-to-point (ATP) residual kriging is a geostatistical method that can be used to create a spatiotemporal exposure model by downscaling from an area- to point-level spatial resolution using fine-scale ancillary data...
November 24, 2016: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/27875195/in-situ-distribution-guided-analysis-and-visualization-of-transonic-jet-engine-simulations
#4
Soumya Dutta, Chun-Ming Chen, Gregory Heinlein, Han-Wei Shen, Jen-Ping Chen
Study of flow instability in turbine engine compressors is crucial to understand the inception and evolution of engine stall. Aerodynamics experts have been working on detecting the early signs of stall in order to devise novel stall suppression technologies. A state-of-the-art Navier-Stokes based, time-accurate computational fluid dynamics simulator, TURBO, has been developed in NASA to enhance the understanding of flow phenomena undergoing rotating stall. Despite the proven high modeling accuracy of TURBO, the excessive simulation data prohibits post-hoc analysis in both storage and I/O time...
January 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/27874325/mixed-beam-murine-harderian-gland-tumorigenesis-predicted-dose-effect-relationships-if-neither-synergism-nor-antagonism-occurs
#5
Nopphon Siranart, Eleanor A Blakely, Alden Cheng, Naval Handa, Rainer K Sachs
Complex mixed radiation fields exist in interplanetary space, and little is known about their late effects on space travelers. In silico synergy analysis default predictions are useful when planning relevant mixed-ion-beam experiments and interpreting their results. These predictions are based on individual dose-effect relationships (IDER) for each component of the mixed-ion beam, assuming no synergy or antagonism. For example, a default hypothesis of simple effect additivity has often been used throughout the study of biology...
November 22, 2016: Radiation Research
https://www.readbyqxmd.com/read/27872902/wind-energy-potential-assessment-of-cameroon-s-coastal-regions-for-the-installation-of-an-onshore-wind-farm
#6
Nkongho Ayuketang Arreyndip, Ebobenow Joseph, Afungchui David
For the future installation of a wind farm in Cameroon, the wind energy potentials of three of Cameroon's coastal cities (Kribi, Douala and Limbe) are assessed using NASA average monthly wind data for 31 years (1983-2013) and compared through Weibull statistics. The Weibull parameters are estimated by the method of maximum likelihood, the mean power densities, the maximum energy carrying wind speeds and the most probable wind speeds are also calculated and compared over these three cities. Finally, the cumulative wind speed distributions over the wet and dry seasons are also analyzed...
November 2016: Heliyon
https://www.readbyqxmd.com/read/27872728/what-unrelated-hematopoietic-stem-cell-transplantation-in-thalassemia-taught-us-about-transplant-immunogenetics
#7
REVIEW
Giorgio La Nasa, Adriana Vacca, Roberto Littera, Eugenia Piras, Sandro Orru, Marianna Greco, Carlo Carcassi, Giovanni Caocci
Although the past few decades have shown an improvement in the survival and complication-free survival rates in patients with beta-thalassemia major and gene therapy is already at an advanced stage of experimentation, hematopoietic stem cell transplantation (HSCT) continues to be the only effective and realistic approach to the cure of this chronic non-malignant disease. Historically, human leukocyte antigen (HLA)-matched siblings have been the preferred source of donor cells owing to superior outcomes compared with HSCT from other sources...
2016: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/27870585/another-earth-2-0-not-so-fast
#8
Dirk Schulze-Makuch, Edward Guinan
The number of confirmed exoplanets now exceeds 3000, with an additional nearly 5000 exoplanet candidates awaiting confirmation in the NASA Exoplanet Archive ( 2016 ). Nearly weekly we hear about the detection of a new exoplanet similar in mass to Earth and located in the so-called habitable zone around its host star. The excitement is understandable given our desire to find a second Earth. However, the excitement should not lead to an over-interpretation of the findings, because the claim can only be to have some crude similarity to Earth based on a few selected geophysical parameters...
November 2016: Astrobiology
https://www.readbyqxmd.com/read/27848986/near-earth-object-hazardous-impact-a-multi-criteria-decision-making-approach
#9
J M Sánchez-Lozano, M Fernández-Martínez
The impact of a near-Earth object (NEO) may release large amounts of energy and cause serious damage. Several NEO hazard studies conducted over the past few years provide forecasts, impact probabilities and assessment ratings, such as the Torino and Palermo scales. These high-risk NEO assessments involve several criteria, including impact energy, mass, and absolute magnitude. The main objective of this paper is to provide the first Multi-Criteria Decision Making (MCDM) approach to classify hazardous NEOs. Our approach applies a combination of two methods from a widely utilized decision making theory...
November 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27844457/application-of-the-atp-assay-to-rapidly-assess-cleanliness-of-spacecraft-surfaces-a-path-to-set-a-standard-for-future-missions
#10
James N Benardini, Kasthuri Venkateswaran
The National Aeronautics and Space Administration (NASA) measures and validates the biological cleanliness of spacecraft surfaces by counting endospores using the NASA standard assay (NSA). NASA has also approved an adenosine-5'-triphosphate (ATP)-based detection methodology as a means to prescreen surfaces for the presence of microbial contamination, prior to the spore assay. During Mars Science Laboratory (MSL) spacecraft assembly, test, and launch operations, 4853 surface samples were collected to verify compliance with the bioburden requirement at launch...
December 2016: AMB Express
https://www.readbyqxmd.com/read/27834891/three-dimensional-rotating-wall-vessel-derived-cell-culture-models-for-studying-virus-host-interactions
#11
REVIEW
Jameson K Gardner, Melissa M Herbst-Kralovetz
The key to better understanding complex virus-host interactions is the utilization of robust three-dimensional (3D) human cell cultures that effectively recapitulate native tissue architecture and model the microenvironment. A lack of physiologically-relevant animal models for many viruses has limited the elucidation of factors that influence viral pathogenesis and of complex host immune mechanisms. Conventional monolayer cell cultures may support viral infection, but are unable to form the tissue structures and complex microenvironments that mimic host physiology and, therefore, limiting their translational utility...
November 9, 2016: Viruses
https://www.readbyqxmd.com/read/27828524/estimation-of-daily-photosynthetically-active-radiation-par-in-presence-of-low-to-high-aerosol-loads-application-to-olci-like-satellite-data
#12
Tristan Harmel, Malik Chami
Estimation of daily photosynthetically active radiation (PAR) is of primary importance for monitoring the ocean primary production and the subsequent production of carbon by phytoplankton at global scale from remote sensing ocean color sensors. On the other hand, aerosol abundance and composition play a critical role in the modulation of PAR. In this study, an original algorithm, so-called OLCIPAR, is proposed for routinely determining the daily PAR from optical satellite sensors such as the OLCI sensor aboard Sentinel-3 (ESA)...
October 31, 2016: Optics Express
https://www.readbyqxmd.com/read/27818851/covariance-between-arctic-sea-ice-and-clouds-within-atmospheric-state-regimes-at-the-satellite-footprint-level
#13
Patrick C Taylor, Seiji Kato, Kuan-Man Xu, Ming Cai
Understanding the cloud response to sea ice change is necessary for modeling Arctic climate. Previous work has primarily addressed this problem from the interannual variability perspective. This paper provides a refined perspective of sea ice-cloud relationship in the Arctic using a satellite footprint-level quantification of the covariance between sea ice and Arctic low cloud properties from NASA A-Train active remote sensing data. The covariances between Arctic low cloud properties and sea ice concentration are quantified by first partitioning each footprint into four atmospheric regimes defined using thresholds of lower tropospheric stability and midtropospheric vertical velocity...
December 27, 2015: Journal of Geophysical Research. Atmospheres: JGR
https://www.readbyqxmd.com/read/27817217/spaceflight-induced-changes-in-the-human-proteome
#14
Alexey S Kononikhin, Natalia L Starodubtseva, Lyudmila Kh Pastushkova, Daria N Kashirina, Kristina Yu Fedorchenko, Alexander G Brhozovsky, Igor A Popov, Irina M Larina, Evgeny N Nikolaev
Spaceflight is one of the most extreme conditions encountered by humans: Individuals are exposed to radiation, microgravity, hypodynamia, and will experience isolation. A better understanding of the molecular processes induced by these factors may allow us to develop personalized countermeasures to minimize risks to astronauts. Areas covered: This review is a summary of literature searches from PubMed, NASA, Roskosmos and the authors' research experiences and opinions. The review covers the available proteomic data on the effects of spaceflight factors on the human body, including both real space missions and ground-based model experiments...
November 21, 2016: Expert Review of Proteomics
https://www.readbyqxmd.com/read/27803333/a-remotely-sensed-pigment-index-reveals-photosynthetic-phenology-in-evergreen-conifers
#15
John A Gamon, K Fred Huemmrich, Christopher Y S Wong, Ingo Ensminger, Steven Garrity, David Y Hollinger, Asko Noormets, Josep Peñuelas
In evergreen conifers, where the foliage amount changes little with season, accurate detection of the underlying "photosynthetic phenology" from satellite remote sensing has been difficult, presenting challenges for global models of ecosystem carbon uptake. Here, we report a close correspondence between seasonally changing foliar pigment levels, expressed as chlorophyll/carotenoid ratios, and evergreen photosynthetic activity, leading to a "chlorophyll/carotenoid index" (CCI) that tracks evergreen photosynthesis at multiple spatial scales...
November 1, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27792152/optimal-subset-selection-of-time-series-modis-images-and-sample-data-transfer-with-random-forests-for-supervised-classification-modelling
#16
Fuqun Zhou, Aining Zhang
Nowadays, various time-series Earth Observation data with multiple bands are freely available, such as Moderate Resolution Imaging Spectroradiometer (MODIS) datasets including 8-day composites from NASA, and 10-day composites from the Canada Centre for Remote Sensing (CCRS). It is challenging to efficiently use these time-series MODIS datasets for long-term environmental monitoring due to their vast volume and information redundancy. This challenge will be greater when Sentinel 2-3 data become available. Another challenge that researchers face is the lack of in-situ data for supervised modelling, especially for time-series data analysis...
October 25, 2016: Sensors
https://www.readbyqxmd.com/read/27790984/a-population-of-planetary-systems-characterized-by-short-period-earth-sized-planets
#17
Jason H Steffen, Jeffrey L Coughlin
We analyze data from the Quarter 1-17 Data Release 24 (Q1-Q17 DR24) planet candidate catalog from NASA's Kepler mission, specifically comparing systems with single transiting planets to systems with multiple transiting planets, and identify a population of exoplanets with a necessarily distinct system architecture. Such an architecture likely indicates a different branch in their evolutionary past relative to the typical Kepler system. The key feature of these planetary systems is an isolated, Earth-sized planet with a roughly 1-d orbital period...
October 25, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27781037/rescue-thrombectomy-in-large-vessel-occlusion-strokes-leads-to-better-outcomes-than-intravenous-thrombolysis-alone-a-real-world-applicability-of-the-recent-trials
#18
Raul G Nogueira, Osama O Zaidat, Alicia C Castonguay, Diogo C Haussen, Coleman O Martin, William E Holloway, Nils Mueller-Kronast, Joey English, Italo Linfante, Guilherme Dabus, Tim W Malisch, Franklin A Marden, Hormozd Bozorgchami, Andrew Xavier, Ansaar T Rai, Michael T Froehler, Aamir Badruddin, Thanh N Nguyen, M Asif Taqi, Michael G Abraham, Vallabh Janardhan, Albert J Yoo, Hashem Shaltoni, Alex Abou-Chebl, Peng R Chen, Gavin W Britz, Roberta Novakovic, Ashish Nanda, Ritesh Kaushal, Mohammad A Issa, Michael R Frankel, Rishi Gupta
BACKGROUND: The Interventional Management of Stroke III (IMS-III) trial demonstrated no benefit for intravenous recombinant tissue plasminogen activator (IV rt-PA) followed by endovascular therapy versus IV rt-PA alone. However, IMS-III mostly included earlier generation devices. The recent thrombectomy trials have incorporated the stent-retriever technology, but their generalizability remains unknown. METHODS: The North American Solitaire Acute Stroke (NASA) registry recruited patients treated with the Solitaire FR™ device between March 2012 and February 2013...
September 2016: Interventional Neurology
https://www.readbyqxmd.com/read/27779956/emergency-medical-considerations-in-a-space-suited-patient
#19
Alejandro Garbino, Derek M Nusbaum, Daniel M Buckland, Anil S Menon, Jonathan B Clark, Erik L Antonsen
The Stratex Project is a high altitude balloon flight that culminated in a freefall from 41,422 m (135,890 ft), breaking the record for the highest freefall to date. Crew recovery operations required an innovative approach due to the unique nature of the event as well as the equipment involved. The parachutist donned a custom space suit similar to a NASA Extravehicular Mobility Unit (EMU), with life support system mounted to the front and a parachute on the back. This space suit had a metal structure around the torso, which, in conjunction with the parachute and life support assembly, created a significant barrier to extraction from the suit in the event of a medical emergency...
2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/27779600/lumbar-spine-paraspinal-muscle-and-intervertebral-disc-height-changes-in-astronauts-after-long-duration-spaceflight-on-the-international-space-station
#20
D G Chang, R M Healey, A J Snyder, J V Sayson, B R Macias, D G Coughlin, J F Bailey, S E Parazynski, J C Lotz, A R Hargens
STUDY DESIGN: Prospective case series. OBJECTIVE: Evaluate lumbar paraspinal muscle (PSM) cross-sectional area and intervertebral disc (IVD) height changes induced by a 6-month space mission on the International Space Station (ISS). The long-term objective of this project is to promote spine health and prevent spinal injury during space missions as well as here on Earth. SUMMARY OF BACKGROUND: NASA crewmembers have a 4.3 times higher risk of herniated IVDs, compared to the general and military aviator populations...
October 25, 2016: Spine
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