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Seasonal intensification and trends of rogue wave events on the US western seaboard

Studies of changes in wave climate typically consider trends in sea state statistics, such as the significant wave height. However, the temporal variability of individual rogue waves, which pose a hazard to users of the sea and coastal environment has not been investigated. We use time series of continuous surface elevation over 124–270 months (spanning 1994–2016), from 15 wave...

Kinetics and Performance of Raw and Torrefied Biomass in a Continuous Bubbling Fluidized Bed Gasifier

This paper is an experimental study of the kinetics of gasification of olive kernel by using a thermogravimetric fluidized bed reactor technique. Gasification of ‘as received’ and torrefied olive kernels were investigated in a lab-scale bubbling fluidized bed gasifier, operating at up to 3.2 kg/h. The effect of bed temperature between 550 and 750 °C in 50 °C increments on the...

Mediterranean sea water budget long-term trend inferred from salinity observations

Changes in the Mediterranean water cycle since 1950 are investigated using salinity and reanalysis based air–sea freshwater flux datasets. Salinity observations indicate a strong basin-scale multi-decadal salinification, particularly in the intermediate and deep layers. Evaporation, precipitation and river runoff variations are all shown to contribute to a very strong increase in...

A model for assessing iceberg hazard

With the polar regions opening up to more marine activities but iceberg numbers more likely to increase than decline as a result of global warming, the risk from icebergs to shipping and offshore facilities is increasing. The NW Atlantic iceberg hazard has been well monitored by the International Ice Patrol for a century, but many other polar regions have little detailed...

A Comparison of the Pyrolysis of Olive Kernel Biomass in Fluidised and Fixed Bed Conditions

The use of thermogravimetric analysis to describe biomass kinetics often uses bench top thermogravimetric analyser (TGA) analysers which are only capable of low heating rates. The aim of this research was to compare experimental fast pyrolysis of Olive kernels in a bespoke laboratory thermogravimetric fluidised bed reactor (TGFBR) characterised by rapid heating rates at high flow...

Potential for seasonal prediction of Atlantic sea surface temperatures using the RAPID array at 26 \(^{\circ }\) N

The Atlantic meridional overturning circulation (AMOC) plays a critical role in the climate system and is responsible for much of the meridional heat transported by the ocean. In this paper, the potential of using AMOC observations from the 26\(^{\circ }\)N RAPID array to predict North Atlantic sea surface temperatures is investigated for the first time. Using spatial...

The SW Sex enigma

The SW Sex stars are a class of cataclysmic variables, originally identified because they shared a number of enigmatic properties – most notably, single-peaked emission lines instead of the double-peaked lines one would expect from their high-inclination accretion discs. We present high-time-resolution spectrophotometry of the eclipsing nova-like variables SW Sex and DW UMa, two...

The AM Canum Venaticorum binary SDSS J173047.59+554518.5

STARLINK distribution Hawaiki and later releases. The STARLINK Software Group homepage can be found at http://starlink.jach.hawaii.edu/starlink. 2 MOLLY was written by T. R. Marsh and is available at http

Orbital period variations of hot Jupiters caused by the Applegate effect

Several authors have shown that precise measurements of transit time variations of exoplanets can be sensitive to other planetary bodies, such as exo-moons. In addition, the transit timing variations of the exoplanets closest to their host stars can provide tests of tidal dissipation theory. These studies, however, have not considered the effect of the host star. There is a large...

Inhibition of CXCR1 and CXCR2 chemokine receptors attenuates acute inflammation, preserves gray matter and diminishes autonomic dysreflexia after spinal cord injury

Anatomy and Neurobiology, Dalhousie University, Halifax, Nova Scotia, CanadaD R Marsh & J M P Flemming AuthorsSearch for D R Marsh in:Nature Research journals • PubMed • Google ScholarSearch for J M P ... Flemming in:Nature Research journals • PubMed • Google Scholar Competing interests The authors declare no conflict of interest. Corresponding author Correspondence to D R Marsh. Rights and permissions To

Prevention and Management of Neonatal Hypothermia in Rural Zambia

Background Neonatal hypothermia is increasingly recognized as a risk factor for newborn survival. The World Health Organization recommends maintaining a warm chain and skin-to-skin care for thermoprotection of newborn children. Since little is known about practices related to newborn hypothermia in rural Africa, this study's goal was to characterize relevant practices, attitudes...

Can a community health worker and a trained traditional birth attendant work as a team to deliver child health interventions in rural Zambia?

Background Teaming is an accepted approach in health care settings but rarely practiced at the community level in developing countries. Save the Children trained and deployed teams of volunteer community health workers (CHWs) and trained traditional birth attendants (TBAs) to provide essential newborn and curative care for children aged 0�59 months in rural Zambia. This paper...

Community case management in Nicaragua: lessons in fostering adoption and expanding implementation

Community case management (CCM) as applied to child survival is a strategy that enables trained community health workers or volunteers to assess, classify, treat and refer sick children who reside beyond the reach of fixed health facilities. The Nicaraguan Ministry of Health (MOH) and Save the Children trained and supported brigadistas (community health volunteers) in CCM to...

Broad-band spectrophotometry of the hot Jupiter HAT-P-12b from the near-UV to the near-IR

Context. The detection of trends or gradients in the transmission spectrum of extrasolar planets is possible with observations at very low spectral resolution. Transit measurements of sufficient accuracy using selected broad-band filters allow for an initial characterization of the atmosphere of the planet.Aims. We want to investigate the atmosphere of the hot Jupiter HAT-P-12b...

CI Aql: a Type Ia supernova progenitor?

If recurrent novae are progenitors of Type Ia supernovae, their white dwarfs must have masses close to the Chandrasekhar limit. The most reliable means of determining white dwarf masses in recurrent novae is dynamically, via radial-velocity and rotational-broadening measurements of the companion star. Such measurements require the system to be both eclipsing and to show...

Remarkable spectral variability on the spin period of the accreting white dwarf in V455 And

We present spin-resolved spectroscopy of the accreting white dwarf binary V455 And. With a suggested spin period of only 67 s, it has one of the fastest spinning white dwarfs known. To study the spectral variability on the spin period of the white dwarf, we observed V455 And with 2 s integration times, which is significantly shorter than the spin rate of the white dwarf. To...

A stellar prominence in the white dwarf/red dwarf binary QS Vir: evidence for a detached system

Using high-resolution Ultraviolet and Visual Echelle Spectrograph (UVES) spectra of the eclipsing post-common envelope binary QS Vir, we detect material along the line of sight to the white dwarf at orbital phase ϕ= 0.16. We ascribe this to a stellar prominence originating from the M dwarf secondary star which passes in front of the white dwarf at this phase. This creates sharp...

Spin-resolved spectroscopy of the intermediate polar DQ Her

We present high-speed spectroscopic observations of the intermediate polar (IP) DQ Herculis. Doppler tomography of two He i lines reveals a spiral density structure in the accretion disc around the white dwarf (WD) primary. The spirals look very similar to the spirals seen in dwarf novae during outburst. DQ Her is the first well-established IP in which spirals are seen, which are...