93 research outputs found
Comparison of 1-D and 2-D Tests in Geotextile Dewatering Applications
In this study, two different one-dimensional tests (only vertical flow) (Pressure Filtration Test and Suction Filtration Test) were compared to determine variability in the results due to different forms of pressure application. In addition, an innovative Two-Dimensional Filtration Apparatus (with both vertical and radial flow) was developed in order to determine the effect of radial flow on the results. This apparatus will more accurately imitate the real-life dewatering application of geotextile tubes. Unlike on-site “hanging bag” and “Pressurized Geotextile Dewatering” tests, this laboratory apparatus was designed in a form that will facilitate the studying of dewatering rate vertically and radially separately. It will also be used by mathematicians, as its geometric form will be more conducive to the analysis of dewatering. This will aid in the creation of a simple and fast mathematical model to determine geotextile dewatering rate, which will reduce the need and cost of experimental testing prior to actual dewatering in the site
The Optical Design of CHARIS: An Exoplanet IFS for the Subaru Telescope
High-contrast imaging techniques now make possible both imaging and
spectroscopy of planets around nearby stars. We present the optical design for
the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS), a
lenslet-based, cryogenic integral field spectrograph (IFS) for imaging
exoplanets on the Subaru telescope. The IFS will provide spectral information
for 138x138 spatial elements over a 2.07 arcsec x 2.07 arcsec field of view
(FOV). CHARIS will operate in the near infrared (lambda = 1.15 - 2.5 microns)
and will feature two spectral resolution modes of R = 18 (low-res mode) and R =
73 (high-res mode). Taking advantage of the Subaru telescope adaptive optics
systems and coronagraphs (AO188 and SCExAO), CHARIS will provide sufficient
contrast to obtain spectra of young self-luminous Jupiter-mass exoplanets.
CHARIS will undergo CDR in October 2013 and is projected to have first light by
the end of 2015. We report here on the current optical design of CHARIS and its
unique innovations.Comment: 15 page
Crustal structure across the Grand Banks–Newfoundland Basin Continental Margin – II. Results from a seismic reflection profile
Author Posting. © Blackwell, 2006. This is the author's version of the work. It is posted here by permission of Blackwell for personal use, not for redistribution. The definitive version was published in Geophysical Journal International 167 (2006): 157-170, doi:10.1111/j.1365-246X.2006.02989.x.New multi-channel seismic (MCS) reflection data were collected over a 565km
transect covering the non-volcanic rifted margin of the central eastern Grand Banks and the Newfoundland Basin in the northwestern Atlantic. Three major crustal zones are interpreted from west to east over the seaward 350-km of the profile: (1) continental crust; (2) transitional basement; (3) oceanic crust. Continental crust thins over a wide zone (~160 km) by forming a large rift basin (Carson Basin) and seaward fault block, together with a series of smaller fault blocks eastward beneath the Salar and Newfoundland basins. Analysis of selected previous reflection profiles (Lithoprobe 85-4, 85-2 and Conrad NB-1) indicates that prominent landward-dipping reflections observed under the continental slope are a regional phenomenon. They define the landward edge of a deep serpentinized mantle layer, which underlies both extended continental crust and transitional basement. The 80-km-wide transitional basement is defined landward by a basement high that may consist of serpentinized peridotite and seaward by a pair of basement highs of unknown crustal origin.
Flat and unreflective transitional basement most likely is exhumed, serpentinized mantle,
although our results do not exclude the possibility of anomalously thinned oceanic crust. A Moho reflection below interpreted oceanic crust is first observed landward of magnetic
anomaly M4, 230 km from the shelf break. Extrapolation of ages from chron M0 to the edge of interpreted oceanic crust suggests that the onset of seafloor spreading was ~138Ma (Valanginian) in the south (southern Newfoundland Basin) to ~125Ma (Barremian-Aptian boundary) in the north (Flemish Cap), comparable to those proposed for the conjugate margins.This work was funded by NSF grants OCE-9819053 and OCE-0326714 to
Woods Hole Oceanographic Institution, NSERC (Canada) and the Danish Research Council.
B. Tucholke also acknowledges support from the Henry Bryant Bigelow Chair in
Oceanography at Woods Hole Oceanographic Institution
Student Recital (December 12, 2012)
What Good Would the Moon Be / Kurt Weill Jordan Ennis, soprano
Concerto / Nikolai Rimsky-Korsakov Andante Cantabile Sage Lewis, trombone
Du bist wie eine Blume, Op. 25, No. 24 / Robert Schumann Long Time Ago / Aaron Copland Richard Moran, tenor
Estudios Sencillos / Leo Brouwer Five Studies / Fredric Hand Nolan Driscoll, guitar
Study No. 7 in A minor / Matteo Carcassi Jeremy Place, guitar
Concerto no. 3 in G, K. 216 / Wolfgang Amadeus Mozart Allegro Carla Mason, violin
Etude No. 14 in D Major / M. Carcassi Etude No. 1 in E minor / Heitor Villa-Lobos James Davidson, guitar
Prelude No. 4 / H. Villa-Lobos Mark Gavin, guitar
Bois Epais / Jean-Baptiste Lully The Call / Ralph Vaughan Williams Justine Smigel, mezzo-soprano
Allegro, Op. 20 / Joseph Hector Fiocco Gail Colombo, violin
Improvisation II et III pour Saxophone Alto Seul / Ryo Noda III Chelsea Fisk, alto saxophonehttps://vc.bridgew.edu/student_concerts/1034/thumbnail.jp
The impact of Covid-19 pandemic on hospices : a systematic integrated review and synthesis of recommendations for policy and practice
Background: The Covid-19 pandemic resulted in the development of numerous recommendations for practice and policy for specialist palliative care provided by hospices in United Kingdom (UK), as hospices were significantly affected by the pandemic and protections put in place.
The aim of this review is to identify and synthesise recommendations or implications for policy and practice that have been generated for adult hospice specialist palliative care during the first 24 months of the Covid-19 pandemic.
Methods: AMED, BNI, CINAHL, EMBASE, EMCARE, HMIC, Medline, PsycINFO, PubMed databases were searched for peer-reviewed papers, as well as hand searchers for grey literature. Literature relating to hospices and Covid-19 in the UK were included and a thematic synthesis of recommendations for hospice policy and practice was undertaken.
Results: 858 articles were identified with 12 meeting the inclusion criteria. Fifty-eight recommendations or implications were identified: 31 for policy, 27 for practice, and 10 covering both. Recommendations were organised under ten themes. There were several recommendations seeking to secure hospice resources to mitigate the short-term impact of the pandemic, as well as those focused on longer-term implications such as core funding. The impact of the pandemic on the quality of hospice care was the focus for numerous recommendations around improving integration of hospice care in the community, provision of bereavement support and better use of Advance Care Plans (ACP). However, there were significant gaps related to carer visitation in hospices, inequities of palliative care, or hospice-at-home services.
Conclusion: The Covid-19 pandemic and protections exposed several ongoing policy and practice needs, especially around hospice resources, while generating novel issues for hospices to address. Significant policy gaps remain to be addressed to mitigate the impact of the pandemic on the quality of hospice specialist palliative care
Tectono-stratigraphic evolution and crustal architecture of the Orphan Basin during North Atlantic rifting
The Orphan Basin is located in the deep offshore of the Newfoundland margin, and it is bounded by the continental shelf to the west, the Grand Banks to the south, and the continental blocks of Orphan Knoll and Flemish Cap to the east. The Orphan Basin formed in Mesozoic time during the opening of the North Atlantic Ocean between eastern Canada and western Iberia–Europe. This work, based on well data and regional seismic reflection profiles across the basin, indicates that the continental crust was affected by several extensional episodes between the Jurassic and the Early Cretaceous, separated by events of uplift and erosion. The preserved tectono-stratigraphic sequences in the basin reveal that deformation initiated in the eastern part of the Orphan Basin in the Jurassic and spread towards the west in the Early Cretaceous, resulting in numerous rift structures filled with a Jurassic–Lower Cretaceous syn-rift succession and overlain by thick Upper Cretaceous to Cenozoic post-rift sediments. The seismic data show an extremely thinned crust (4–16 km thick) underneath the eastern and western parts of the Orphan Basin, forming two sub-basins separated by a wide structural high with a relatively thick crust (17 km thick). Quantifying the crustal architecture in the basin highlights the large discrepancy between brittle extension localized in the upper crust and the overall crustal thinning. This suggests that continental deformation in the Orphan Basin involved, in addition to the documented Jurassic and Early Cretaceous rifting, an earlier brittle rift phase which is unidentifiable in seismic data and a depth-dependent thinning of the crust driven by localized lower crust ductile flow
Ecological implications of fine-scale fire patchiness and severity in tropical savannas of northern Australia
Research ArticleUnderstanding fine-scale fire patchiness
has significant implications for
ecological processes and biodiversity
conservation. It can affect local
extinction of and recolonisation by
relatively immobile fauna and poorly
seed-dispersed flora in fire-affected
areas. This study assesses fine-scale fire
patchiness and severity, and associated
implications for biodiversity, in north
Australian tropical savanna systems.
We used line transects to sample
burning patterns of ground layer
vegetation in different seasons and
vegetation structure types, within the
perimeter of 35 fires that occurred
between 2009 and 2011. We evaluated
two main fire characteristics: patchiness
(patch density and mean patch length)
and severity (inferred from char and
scorch heights, and char and ash
proportions). The mean burned area of ground vegetation was 83 % in the
early dry season (EDS: May to July)
and 93 % in the late dry season (LDS:
August to November). LDS fires were
less patchy (smaller and fewer
unburned patches), and had higher fire
severity (higher mean char and scorch
heights, and twice the proportion of
ash) than EDS fires. Fire patchiness
varied among vegetation types,
declining under more open canopy
structure. The relationship between
burned area and fire severity depended
on season, being strongly correlated in
the EDS and uncorrelated in the LDS.
Simulations performed to understand
the implications of patchiness on the
population dynamics of fire-interval
sensitive plant species showed that
small amounts of patchiness
substantially enhance survival. Our
results indicate that the ecological
impacts of high frequency fires on firesensitive
regional biodiversity
elements are likely to be lower than
has been predicted from remotely
sensed studies that are based on
assumptions of homogeneous burninginfo:eu-repo/semantics/publishedVersio
Asymmetric Price Responses of Gasoline Stations: Evidence for Heterogeneity of Retailers
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