12,684 research outputs found
Patsy Sand/David Bloch Student Sonata Recital, August 3, 1960
No full textConcert program for Patsy Sand/David Bloch Student Sonata Recital,
August 3, 196
Map shewing routes of the exploring & prospecting expedition between Coolgardie and Kimberley, Western Australia [cartographic material] : equipped and led by the Hon. David W. Carnegie 1896-1897.
No full textMap shows country from approximately 18°S to 31°S and from 121°E to 129°E.; Includes views and sections of significant landmarks.; Other members of the expedition: Joseph A. Breaden, Godfrey E. Massie, Charles W. Stansmore (Died Nov. 30 /96) and Warri (Aboriginal).; Signed: David W. Carnegie, Oct. 23 1897.; With: Spinifex & sand : a narrative of five years' pioneering and exploration in Western Australia / by David W. Carnegie. London : C. Arthur Pearson Limited , Henrietta Street W.C., 1898.; Ferguson, J.A. Bibliography of Australia, 7960; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-rm1796.Spinifex and san
Monitoring sand particle concentration in multiphase flow using acoustic emission technology
No full textMultiphase flow is the simultaneous flow of two or several phases through a
system such as a pipe. This common phenomenon can be found in the
petroleum and chemical engineering industrial fields. Transport of sand particles
in multiphase production has attracted considerable attention given sand
production is a common problem especially to the oil and gas industry. The
sand production causes loss of pipe wall thickness which can lead to expensive
failures and loss of production time. Build-up of sand in the system can result in
blockage and further hamper production. Monitoring of multiphase flow is a
process that has been established over several decades.
This thesis reports an assessment of the application of Acoustic Emission (AE)
technology as an alternative online technique to monitoring of sand particles
under multiphase flow conditions in a horizontal pipe. The research was
conducted on a purpose built test rig with the purpose of establishing a relation
between AE activity and sand concentration under different multiphase flow
conditions.
The investigation consisted of five experimental tests. The initial experiment
was performed to provide a basis for the application of AE technology to detect
sand particle impact prior to performing tests in multiphase flow conditions.
Further investigations are reported on two phase air-sand, water-sand and air-
water-sand three-phase flows in a horizontal pipe for different superficial gas
velocities (VSG), superficial liquid velocities (VSL) and sand concentrations (SC).
The experimental findings clearly showed a correlation exists between AE
energy levels and multiphase flow parameters, such as superficial liquid velocity
(VSL), superficial gas velocity (VSG), sand concentration and sand minimum
transport condition (MTC)
LIPIcs, Volume 257, SAND 2023, Complete Volume
No full textLIPIcs, Volume 257, SAND 2023, Complete Volum
North Carolina’s Barrier Islands: Wonders of Sand, Sea, and Sky: Book Review
No full textIn North Carolina’s Barrier Islands: Wonders of Sand, Sea, and Sky, author David Blevins offers readers a glimpse into the fragile ecosystems which make up the barrier islands off the North Carolina coastline. As the islands have been formed by rising seas and moving continental shelves, different types of wildlife have been able to survive for many years. Despite the existence of the islands, the author is careful to point out that human beings must do all in their power to preserve these natural treasures for future generations to enjoy. Essentially, the book takes readers on a tour from the North Carolina/Virginia border all the way down to the North Carolina/South Carolina border. Throughout the pages of the book, the author depicts the distinctive wildlife or ecological features to be found on each North Carolina barrier island
Initial Plant Growth in Sand Mine Spoil Amended with Peat Moss and Fertilizer Under Greenhouse Conditions: Potential Species for Use in Reclamation
No full textThe Great Lakes Basin exhibits the largest collection of freshwater sand dunes in the world. Sand dunes are ecologically important and support a unique assemblage of flora and fauna. Sand dunes are also economically valuable. However, when sand dunes are mined, soil quality is drastically reduced. Therefore, soil quality improvements followed by revegetation maybe necessary for successful reclamation. This study evaluates the germination and initial growth of 2 legume species, sundial lupine (Lupinus perennis) and Illinois bundleflower (Desmanthus illinoensis), and 2 warm-season grass species, Indian grass (Sorghastrum nutans) and little bluestem (Schizachyrium scoparium), in the presence of 2 soil amendments (inorganic fertilizer and sphagnum peat moss) added to spoil from a local sand mine. We sowed species in pots and propagated them under greenhouse conditions. Results indicate that sundial lupine and Illinois bundleflower exhibited the greatest germination and growth among species. Peat moss had the greatest overall impact on germination and growth while the addition of fertilizer positively affected initial growth. Based on these results, sundial lupine is recognized as a primary candidate for sand mine reclamation, while Illinois bundleflower is also recommended as an appropriate species for revegetation efforts. We recommend using soil amendments that are functionally equivalent to peat in increasing soil water holding capacity. We further suggest that fertilization may be accomplished by including legumes in plant species mixes used for revegetation. Results presented here may help to identify appropriate species and soil amendments for the reclamation of former sand mines or restoration of freshwater sand dunes
Map shewing country traversed by the author 1894-1895 [cartographic material] : May 1895.
No full textDepths and relief shown by contours.; Shows routes of prospecting expeditions of Carnegie and Luck (1894); Carnegie, Conly and Egan (1895) and other explorers.; Covers East Murchison, North Coolgardie, and East Coolgardie regions.; Numbered blocks denote land held by The Hampton Plains Land Company.; Bears annolation: "This plan has been adopted by the Department of Mines, Perth W.A., for temporary use until further Government detailed surveys are performed. Henry C. Princip, Under Secretary for Mines".; Published with: Spinifex & sand. London : C. Arthur Pearson Ltd., 1895. (Ferguson no. 7960); Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-rm2356.Spinifex and san
The role of leishmania proteophosphoglycans in sand fly transmission and infection of the Mammalian host.
No full textLeishmania are transmitted by the bite of their sand fly vector and this has a significant influence on the virulence of the resulting infection. From our studies into the interaction between parasite, vector, and host we have uncovered an important missing ingredient during Leishmania transmission. Leishmania actively adapt their sand fly hosts into efficient vectors by secreting Promastigote Secretory Gel (PSG), a proteophosphoglycan (PPG)-rich, mucin-like gel which accumulates in sand fly gut and mouthparts. This has the effect of blocking the fly, such that during bloodfeeding both parasites and gel are co-transmitted in an act of regurgitation. We are discovering that this has further implications for the mammalian infection, again, in favor of the parasite. Experimentally, PSG exacerbates cutaneous and visceral leishmaniasis and can promote the chronicity of Leishmania infection, even in mouse strains normally capable of controlling leishmaniasis. The underlying mechanism of PSG's action is a major focus of our ongoing work. This review aims to synthesize what is known about the role and action of PSG and its constituent proteophosphoglycans, for parasite colonization of the sand fly, transmission, and mammalian infection. Lastly, we discuss potential exploitation of this important vector-transmitted product and future avenues of research
First report of phlebotomine sand flies (Diptera: Psychodidae) in Kansas and Missouri, and a PCR method to distinguish Lutzomyia shannoni from Lutzomyia vexator
No full textCitation: Weng, Ju-Lin, Samantha L. Young, David M. Gordon, David Claborn, Christine Petersen, and Marcelo Ramalho-Ortigao. 2012. “First Report of Phlebotomine Sand Flies (Diptera: Psychodidae) in Kansas and Missouri, and a PCR Method to Distinguish Lutzomyia Shannoni From Lutzomyia Vexator.” Journal of Medical Entomology 49 (6): 1460–65. https://doi.org/10.1603/ME12105.Sand flies Lutzomyia (Psathyromyia) shannoni (Dyar) and Lu. (Helcocyrtomyia) vexator (Coquillet) were collected for the first time in southwest Missouri and southeast Kansas, expanding the known range of these species in North America. Altogether, 680 sand flies (356 males and 324 females) were collected during trapping from May through October 2011 and identified using morphological characters. Of the total sand flies collected, 315 were identified as Lu. shannoni, with 181 individuals (or 26.6% of all sand flies) trapped in Missouri and 134 individuals (or 19.7%) trapped in Kansas. Whereas 358 Lu. vexator were identified from southwest Missouri, only a single specimen was trapped in southeast Kansas. One male Lu. vexator with asymmetric gonostyli was trapped in Missouri. We also developed a polymerase chain reaction protocol to consistently and accurately distinguish Lu. shannoni from Lu. vexator based on presence or absence of a 416 bp fragment from the cytochrome oxidase c subunit 1 gene
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