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https://www.readbyqxmd.com/read/29457754/effect-of-ship-hull-form-on-the-resistance-penalty-from-biofouling
#1
Dinis Oliveira, Ann I Larsson, Lena Granhag
Hull biofouling is a well-known problem for the shipping industry, leading to increased resistance and fuel consumption. Considering that the effects of hull form on resistance are known to be higher for a less slender hull, it is hypothesised in this paper that the effect of biofouling roughness on resistance is also dependent on the hull form. To test this hypothesis, previously reported full-scale numerical results on a containership are re-analysed. Form effects on roughness penalties, corresponding to KΔCT = 0...
February 19, 2018: Biofouling
https://www.readbyqxmd.com/read/29455467/predicting-reintroduction-outcomes-for-highly-vulnerable-species-that-do-not-currently-coexist-with-their-key-threats
#2
Elizabeth H Parlato, Doug P Armstrong
Predicting reintroduction outcomes before populations are released is inherently challenging. It becomes even more difficult when the species being considered for reintroduction no longer co-exists with the key threats limiting its distribution. However, data from other species facing the same threats can be used to make predictions under these circumstances. We present an integrated Bayesian modelling approach for predicting growth of a reintroduced population at a range of predator densities when no data are available for the species in the presence of that predator...
February 17, 2018: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/29454491/risk-assessment-for-ballast-water-management-learning-from-the-adriatic-sea-case-study
#3
Matej David, Stephan Gollasch
The ballast water management convention incorporates principles of risk assessment. A new ballast water management risk assessment model was developed to support the implementation of most efficient management measures, which we also present as a flowchart decision support system model. The risk assessment model was tested using data from port baseline surveys where available, and real shipping and ballast water discharges data. The here presented ballast water management risk assessment and possible management options are applicable elsewhere to support and improve complex decision making in the implementation of management requirements according to the ballast water management convention...
February 14, 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29454204/scanning-vertical-distributions-of-typical-aerosols-along-the-yangtze-river-using-elastic-lidar
#4
Shidong Fan, Cheng Liu, Zhouqing Xie, Yunsheng Dong, Qihou Hu, Guangqiang Fan, Zhengyi Chen, Tianshu Zhang, Jingbo Duan, Pengfei Zhang, Jianguo Liu
In recent years, China has experienced heavy air pollution, especially haze caused by particulate matter (PM). The compositions, horizontal distributions, transport, and chemical formation mechanisms of PM and its precursors have been widely investigated in China based on near-ground measurements. However, the understanding of the distributions and physical and chemical processes of PM in the vertical direction remains limited. In this study, an elastic lidar was employed to investigate the vertical profiles of aerosols along the Yangtze River during the Yangtze River Campaign of winter 2015...
February 14, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29451478/-htlv-1-and-dendritic-cells-a-relation-ship-in-search-of-maturation
#5
Nicolas Futsch, Renaud Mahieux, Hélène Dutartre
No abstract text is available yet for this article.
February 2018: Médecine Sciences: M/S
https://www.readbyqxmd.com/read/29449782/perception-of-american-english-vowels-by-sequential-spanish-english-bilinguals
#6
Paula B García, Karen Froud
Research on American-English (AE) vowel perception by Spanish-English bilinguals has focused on the vowels /i/-/ɪ/ (e.g., in sheep / ship ). Other AE vowel contrasts may present perceptual challenges for this population, especially those requiring both spectral and durational discrimination. We used Event-Related Potentials (ERPs), MMN (Mismatch Negativity) and P300, to index discrimination of AE vowels /ɑ/-/ʌ/ by sequential adult Spanish-English bilingual listeners compared to AE monolinguals. Listening tasks were non-attended and attended, and vowels were presented with natural and neutralized durations...
January 2018: Bilingualism: Language and Cognition
https://www.readbyqxmd.com/read/29448489/spontaneous-emergence-of-rogue-waves-in-partially-coherent-waves-a-quantitative-experimental-comparison-between-hydrodynamics-and-optics
#7
R El Koussaifi, A Tikan, A Toffoli, S Randoux, P Suret, M Onorato
Rogue waves are extreme and rare fluctuations of the wave field that have been discussed in many physical systems. Their presence substantially influences the statistical properties of a partially coherent wave field, i.e., a wave field characterized by a finite band spectrum with random Fourier phases. Their understanding is fundamental for the design of ships and offshore platforms. In many meteorological conditions waves in the ocean are characterized by the so-called Joint North Sea Wave Project (JONSWAP) spectrum...
January 2018: Physical Review. E
https://www.readbyqxmd.com/read/29446685/inactivation-of-salmonella-and-surrogate-bacteria-on-cashews-and-macadamia-nuts-exposed-to-commercial-propylene-oxide-processing-conditions
#8
Thomas Saunders, Jian Wu, Robert C Williams, Haibo Huang, Monica A Ponder
Propylene oxide (PPO), a chemical fumigant, has been validated to reduce Salmonella on bulk almonds but has not been evaluated for other tree nuts. There is a need to identify nonpathogenic surrogate microorganisms whose inactivation is comparable to that of Salmonella to assure effective PPO processing parameters in different packaging configurations without introducing Salmonella into the pasteurization facility. The objective of this research was to compare the reduction of Salmonella and three potential surrogate bacterial strains, Enterococcus faecium ATCC 8459, Pediococcus acidilactici ATCC 8042, or Staphylococcus carnosus ATCC 51365, on cashews and macadamia nuts processed by using PPO...
February 15, 2018: Journal of Food Protection
https://www.readbyqxmd.com/read/29445018/high-rates-of-vessel-noise-disrupt-foraging-in-wild-harbour-porpoises-phocoena-phocoena
#9
Danuta Maria Wisniewska, Mark Johnson, Jonas Teilmann, Ursula Siebert, Anders Galatius, Rune Dietz, Peter Teglberg Madsen
Shipping is the dominant marine anthropogenic noise source in the world's oceans, yet we know little about vessel encounter rates, exposure levels and behavioural reactions for cetaceans in the wild, many of which rely on sound for foraging, communication and social interactions. Here, we used animal-borne acoustic tags to measure vessel noise exposure and foraging efforts in seven harbour porpoises in highly trafficked coastal waters. Tagged porpoises encountered vessel noise 17-89% of the time and occasional high-noise levels coincided with vigorous fluking, bottom diving, interrupted foraging and even cessation of echolocation, leading to significantly fewer prey capture attempts at received levels greater than 96 dB re 1 µPa (16 kHz third-octave)...
February 14, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29444322/physiological-reactions-to-long-term-fishing-in-the-barents-sea
#10
B Netterstrøm, Å M Hansen, D Isaacson, A M Simonsen, P Weihe
Background: Fishing in distant waters for months may induce physiological stress. Aims: To assess the physiological stress reactions in fishermen working for 2-3 months continuously in 6-h shifts on trawlers in the Barents Sea. Methods: The crew of five trawlers fishing in the Barents Sea from January to April 2004 were invited to participate. In the week before and 5-7 days after the trip, the following measures were collected: salivary cortisol four times a day, 24-h urinary cortisol, blood pressure, heart rate, serum cholesterol, serum high-density lipoprotein (HDL-cholesterol), HbA1c (glycosylated haemoglobin) and weight...
February 10, 2018: Occupational Medicine
https://www.readbyqxmd.com/read/29443862/red-tides-mass-casualty-and-whole-blood-at-sea-red-tides
#11
Benjamin T Miller, Andrew H Lin, Susan C Clark, Andrew P Cap, Joseph J Dubose
BACKGROUND: The U.S. Navy's casualty-receiving ships provide remote damage control resuscitation (RDCR) platforms to treat injured combatants deployed afloat and ashore. We report a significant mass casualty incident aboard the USS Bataan, and the most warm fresh whole blood (WFWB) transfused at sea for traumatic hemorrhagic shock since the Vietnam War. METHODS: Casualty-receiving ships have robust medical capabilities, including a frozen blood bank with packed red blood cells (pRBC) and fresh frozen plasma (FFP)...
February 13, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29439557/a-novel-ship-detection-method-based-on-gradient-and-integral-feature-for-single-polarization-synthetic-aperture-radar-imagery
#12
Hao Shi, Qingjun Zhang, Mingming Bian, Hangyu Wang, Zhiru Wang, Liang Chen, Jian Yang
With the rapid development of remote sensing technologies, SAR satellites like China's Gaofen-3 satellite have more imaging modes and higher resolution. With the availability of high-resolution SAR images, automatic ship target detection has become an important topic in maritime research. In this paper, a novel ship detection method based on gradient and integral features is proposed. This method is mainly composed of three steps. First, in the preprocessing step, a filter is employed to smooth the clutters and the smoothing effect can be adaptive adjusted according to the statistics information of the sub-window...
February 12, 2018: Sensors
https://www.readbyqxmd.com/read/29438719/a-multi-step-approach-for-testing-non-toxic-amphiphilic-antifouling-coatings-against-marine-microfouling-at-different-levels-of-biological-complexity
#13
Karsten Zecher, Vishwa Prasad Aitha, Kirsten Heuer, Herbert Ahlers, Katrin Roland, Michael Fiedel, Bodo Philipp
Marine biofouling on artificial surfaces such as ship hulls or fish farming nets causes enormous economic damage. The time for the developmental process of antifouling coatings can be shortened by reliable laboratory assays. For designing such test systems, it is important that toxic effects can be excluded, that multiple parameters can be addressed simultaneously and that mechanistic aspects can be included. In this study, a multi-step approach for testing antifouling coatings was established employing photoautotrophic biofilm formation of marine microorganisms in micro- and mesoscoms...
February 10, 2018: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29438389/a-chance-constrained-stochastic-approach-to-intermodal-container-routing-problems
#14
Yi Zhao, Ronghui Liu, Xi Zhang, Anthony Whiteing
We consider a container routing problem with stochastic time variables in a sea-rail intermodal transportation system. The problem is formulated as a binary integer chance-constrained programming model including stochastic travel times and stochastic transfer time, with the objective of minimising the expected total cost. Two chance constraints are proposed to ensure that the container service satisfies ship fulfilment and cargo on-time delivery with pre-specified probabilities. A hybrid heuristic algorithm is employed to solve the binary integer chance-constrained programming model...
2018: PloS One
https://www.readbyqxmd.com/read/29436505/-drip-and-drive-shipping-the-neurointerventionalist-to-provide-mechanical-thrombectomy-in-primary-stroke-centers
#15
Caspar Brekenfeld, Einar Goebell, Holger Schmidt, Henning Henningsen, Christoffer Kraemer, Jörg Tebben, Fabian Flottmann, Götz Thomalla, Jens Fiehler
BACKGROUND: To satisfy the increasing demand of mechanical thrombectomy (MT) for acute ischemic stroke treatment, new organizational concepts for patient care are required. This study evaluates time intervals of acute stroke management in two stroke care models, including one based on transportation of the interventionalist from a comprehensive stroke center (CSC) to treat patients in two primary stroke centers (PSC). We hypothesized that time intervals were not inferior for the 'drip-and-drive' concept compared with the traditional 'drip-and-ship' concept...
February 7, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29434193/absolute-marine-gravimetry-with-matter-wave-interferometry
#16
Y Bidel, N Zahzam, C Blanchard, A Bonnin, M Cadoret, A Bresson, D Rouxel, M F Lequentrec-Lalancette
Measuring gravity from an aircraft or a ship is essential in geodesy, geophysics, mineral and hydrocarbon exploration, and navigation. Today, only relative sensors are available for onboard gravimetry. This is a major drawback because of the calibration and drift estimation procedures which lead to important operational constraints. Atom interferometry is a promising technology to obtain onboard absolute gravimeter. But, despite high performances obtained in static condition, no precise measurements were reported in dynamic...
February 12, 2018: Nature Communications
https://www.readbyqxmd.com/read/29433101/polychlorinated-biphenyl-pcb-contamination-in-galveston-bay-texas-comparing-concentrations-and-profiles-in-sediments-passive-samplers-and-fish
#17
Elias M Oziolor, Jennifer N Apell, Zach C Winfield, Jeffrey A Back, Sascha Usenko, Cole W Matson
The industrialized portion of the Houston Ship Channel (HSC) is heavily contaminated with anthropogenic contaminants, most prominent of which are the polychlorinated biphenyls (PCBs). This contamination has driven adaptive evolution in a keystone species for Galveston Bay, the Gulf killifish (Fundulus grandis). We investigated the geographical extent of PCB impacts by sampling 12 sites, ranging from the heavily industrialized upper portion of the HSC to Galveston Island. At each site, PCB concentrations and profiles were determined in three environmental compartments: sediment, water (polyethylene passive samplers), and fish tissue (resident Gulf killifish)...
February 9, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29428846/effect-of-different-shipping-temperatures-%C3%A2-22%C3%A2-%C3%A2-c-vs-%C3%A2-7%C3%A2-%C3%A2-c-and-holding-media-on-blastocyst-development-after-overnight-holding-of-immature-equine-cumulus-oocyte-complexes
#18
Mouhamadou Diaw, Renato M Salgado, Heloísa S Canesin, Nell Gridley, Katrin Hinrichs
Intracytoplasmic sperm injection (ICSI) is an important tool for equine embryo production in both clinical and research settings. In clinical ICSI programs, immature equine cumulus-oocyte complexes (COCs) are often collected at the mare's location and shipped to the ICSI laboratory. To simplify shipment and aid scheduling of subsequent procedures, COCs can be held overnight at room temperature (∼22 °C) before placement into maturation culture, with no detrimental effect on meiotic or developmental competence...
February 2, 2018: Theriogenology
https://www.readbyqxmd.com/read/29428095/effects-of-pre-analytical-variables-on-flow-cytometric-diagnosis-of-canine-lymphoma-a-retrospective-study-2009-2015
#19
S Comazzi, M Cozzi, S Bernardi, D R Zanella, L Aresu, D Stefanello, L Marconato, V Martini
Flow cytometry (FC) is increasingly being used for immunophenotyping and staging of canine lymphoma. The aim of this retrospective study was to assess pre-analytical variables that might influence the diagnostic utility of FC of lymph node (LN) fine needle aspirate (FNA) specimens from dogs with lymphoproliferative diseases. The study included 987 cases with LN FNA specimens sent for immunophenotyping that were submitted to a diagnostic laboratory in Italy from 2009 to 2015. Cases were grouped into 'diagnostic' and 'non-diagnostic'...
February 2018: Veterinary Journal
https://www.readbyqxmd.com/read/29427772/circulating-angiopoietin-2-and-its-soluble-receptor-tie-2-concentrations-are-related-to-inflammatory-markers-in-the-general-population
#20
Elisabeth A Schuldt, Wolfgang Lieb, Marcus Dörr, Markus M Lerch, Henry Völzke, Matthias Nauck, Nele Friedrich
BACKGROUND: The Angiopoietin/Tie (Tyrosine kinase with Ig and EGF homology domains) signaling axis has crucial influences on angiogenesis and the vasculature's reorganization. Moreover, angiopoietin-2 (Ang2) is discussed as a biomarker for diseases' severity and development. Previous studies reported increased Ang2 levels in patients with inflammatory diseases and associations of Ang2 with inflammation markers in relatively small samples. We aimed to assess the relation of Ang2 and Tie2 with inflammation markers in the general population...
February 7, 2018: Cytokine
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