137,568 research outputs found
Crystal morphology and surface reactivity studies of calcium hydroxide
No full textThis thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Calcium hydroxide samples, obtained as a precipitate from the mixing of solutions of sodium hydroxide with a variety of calcium salts in the optional presence of ethanol and a silylating agent, have been characterised by the techniques of nitrogen adsorption, water vapour adsorption , thermogravimetric analysis, Fourier-transform infra-red spectroscopy, ultra-violet spectroscopy and electron microscopy. The morphology of the samples varied from octahedral crystals to hexagonal prisms to sheets. The individual morphology depends on the conditions of precipitation, the nature and concentration of the calcium salt(s) and the nature of the precipitation medium. It has been shown that a large excess of sodium hydroxide results in octahedral forms, calcium salt(s) in approximate equimolar amount or in large excess to the sodium hydroxide results in hexagonal forms, and sheets are formed in the presence of ethanolic precipitation medium. A poisoning mechanism has been suggested in terms of the morphological properties of the samples. It has been found that the sheet forms of calcium hydroxide can be stabilised by reaction with a silylating agent, resulting in greater thermal stability and chemical stability of the surface. Silylation was found not to occur by direct contact between the precipitated calcium hydroxide samples and silylating agents. Silylation only occurred when precipitation was carried out in the presence of a solution of the silylating agent in absolute ethanol. The silylation of the surface of calcium hydroxide has been found to stabilise the material. Reaction of this with 3-aminopropyltriethoxysilane formed an intermediate which subsequently reacted with p-nitrobenzoyl chloride to form an inorganic - organic composite. The technique of thermogravimetric analysis has been employed to measure the thermal stability of the samples. It has been found that the samples exhibit major weight losses at around 688K for the non-silylated samples and around 918K for the silylated samples. The BETnitrogen and the BET-H20 surface areas of the samples range typically from --1 to 43 m2g-1 , and from 9 to 798 m2g-1 respectively. On the basis of this evidence, taken together with the isotherm shapes it has been shown that: the samples are non-porous; non-silylated calcium hydroxide samples are more hydrophobic than the silylated samples, but upon heat-treatment in air below the decomposition temperature the silylated samples became more hydrophobic, whereas the non-silylated samples became more hydrophilic; samples heated in air at above the decomposition temperature exhibit a dramatic increase in hydrophilicity, the H 20-BET surface areas becoming —800 m2g-1 for non silylated samples, compared to 368 - 600 m 2g-1 for silylated samples, indicative of chemisorption following decomposition of the calcium hydroxide to form calcium oxide
Sing-Along - Souvenir d\u27un Vieillard
No full textFrom our monthly sing-along series: sisters Irène and Helène Sylvaine sing a touching rendition of \u27Souvenir d\u27un Vieillard\u27 (An Old Man\u27s Memory)https://digitalcommons.usm.maine.edu/fac-music-performances/1015/thumbnail.jp
Sing Kate, sing
No full textGift of Dr. Mary Jane Esplen.Piano vocal [instrumentation]Miss Katie O 'Shane was a plain looking dame [first line]Sing Kate sing sing about lovers and love in the spring [first line of chorus]D major [key]Waltz time [tempo]Popular song [form/genre]Parrot, music notes [illustration]De Takacs [engraver]Publisher's advertisement on front inside cover & back cover [note
Sing, Kate, sing
No full textGift of Dr. Mary Jane Esplen.Piano vocal [instrumentation]Miss Katie O'Shane was a plain looking dame [first line]Sing, Kate, sing [first line of chorus]D [key]Waltz time [tempo]Popular song ; waltz [form/genre]Red parrot woman music notes [illustration]De Takacs [graphic artist]Publisher's advertisement on inside front and back cover [note
We sing from experience
No full textSermon, We sing from experience by J. Ellsworth Kalas together with a dramatic presentation Wesley on Wesley by Charles D. Killian.https://place.asburyseminary.edu/atsconferences/3198/thumbnail.jp
Why the Amish Sing
No full textAn intimate portrait of the diverse music-making at the center of Amish faith and life.Singing occurs in nearly every setting of Amish life. It is a sanctioned pleasure that frames all Amish rituals and one that enlivens and sanctifies both routine and special events, from household chores, road trips by buggy, and family prayer to baptisms, youth group gatherings, weddings, and “single girl” sings. But because Amish worship is performed in private homes instead of public churches, few outsiders get the chance to hear Amish people sing. Amish music also remains largely unexplored in the field of ethnomusicology. In Why the Amish Sing, D. Rose Elder introduces readers to the ways that Amish music both reinforces and advances spiritual life, delving deep into the Ausbund, the oldest hymnal in continuous use. This illuminating ethnomusicological study demonstrates how Amish groups in Wayne and Holmes Counties, Ohio—the largest concentration of Amish in the world—sing to praise God and, at the same time, remind themselves of their 450-year history of devotion. Singing instructs Amish children in community ways and unites the group through common participation. As they sing in unison to the weighty words of their ancestors, the Amish confirm their love and support for the community. Their singing delineates their common journey—a journey that demands separation from the world and yielding to God's will.By making school visits, attending worship services and youth sings, and visiting private homes, Elder has been given the rare opportunity to listen to Amish singing in its natural social and familial context. She combines one-on-one interviews with detailed observations of how song provides a window into Amish cultural beliefs, values, and norms
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Come, sing to me : song /
No full textE. & S. 4185 (Publisher number). Duet for medium or low voices... in D. For voice and piano.; Cover title.; "Answer to "Come, sing to me", "I'll sing to you", C (A to C) E-flat F... by Jack Thompson"--At top of cover.; Plate number: E. & S. 4185.; Also available online http://nla.gov.au/nla.mus-vn6504155; Cover: 1909 by Enoch & Sons.; Caption page: 1911 by Enoch & Sons (duet arrangement).Come, sing to me : due
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
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