196,317 research outputs found
The picture superiority effect in recognition memory: A developmental study using the response signal procedure
No full textItems studied as pictures are better remembered than items studied as words even when test items are presented as words. The present study examined the development of this picture superiority effect in recognition memory. Four groups ranging in age from 7 to 20 years participated. They studied words and pictures, with test stimuli always presented as words, and time to respond to test stimuli was manipulated. The picture superiority effect showed a clear developmental trend. In the condition in which participants had ample response time, a significant picture superiority effect appeared in all but the youngest group. With short response time, a significant picture superiority effect appeared only among 11- and 20-year-old groups, while a significant reverse of the picture superiority effect was detected in the youngest group. These results were interpreted as suggesting that different memory processes (familiarity and recollection) contribute differently to the picture superiority effect at different stages of development. © 2009 Elsevier Inc. All rights reserved
The synthesis and x-ray structure analysis of Os6(CO) 17(NC5H5)2: A cluster compound with an unusual mode of metal-CO bonding
No full textReaction of the neutral hexaosmium cluster Os6(CO)18 with excess of pyridine (py) gives the pentanuclear dianion [Os 5(CO)15]2- together with small amounts of a neutral hexanuclear cluster Os6(CO)17(py)2 (1); X-ray analysis shows that (1) exhibits an unusual type of metal-carbonyl linkage
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
A new type of decaosmium cluster geometry : The synthesis and x-ray structure analysis of Os10(S)2(CO)23
No full textPyrolysis of Os3(CO)12 with elemental sulphur gives a range of clusters including Os3(S)2(CO)9, Os5S(CO)15, Os6(CO)18, Os 7(S)2(CO)20, and Os10(S) 2(CO)23 (1); X-ray analysis shows that (1) has a new type of Os10 metal core geometry
Synthesis of the cluster dianion [Os11C(CO)27]2- by pyrolysis and its reactions with electrophiles; X-ray structure analysis of the mixed-metal derivative [PMePh3][Os11C(CO)27Cu(NCMe)]·CH 2Cl2 and the hydrido derivative [PMePh3][Os11C(CO)27H]
No full textThe new cluster species [Os11C(CO)27]2- (2) has been identified as one of the products resulting from the pyrolysis of [Os3(CO)12]. It reacts with [Cu(NCMe)4] BF4 to yield the monoanion [Os11C(CO)27Cu(NCMe)]- (4) and [Os11C(CO)27Cu(NCMe)2] (5). The reaction of (2) with iodine-iodide produces a series of iodo-clusters [Os11C(CO)27I]- (8) and [Os11C(CO)27I2] (9) which are converted back into (2) by addition of halide ions. The unstable monoanionic species [Os11C(CO)27M(PMe2Ph)]- [M = Au (3) or Cu (7)] are obtained on reaction of (2) with [M(PMe2Ph)]+, and further reaction of (3) yields [Os11C(CO)27Au(PMe2Ph)2] (6). The dianionic cluster (2) reacts with acid to give the monoanion [Os11C(CO)27H]- (10) and [Os11C(CO)27H2] (11). The reaction with Hg(C6Cl5) (O2CCF3) yields initially the unstable monoanion [Os11C(CO)27Hg(C6Cl5)]- (12) which is rapidly converted into the known cluster dianion [Os20Hg(C)2(CO)48]2-. X-Ray analysis of the [PMePh3]+ salts of (4) and (10) reveal identical Os11 core geometries, but in (4) the copper ligand occupies a μ3-bridging position, while the hydride in (10) appears to be located in an interstitial site
The first nona-osmium cluster species; synthesis and x-ray structure analysis of [Os9(CO)21CHC(R)CH]- (R = Me or Et)
No full textWhen Os3(CO)12 is heated under reflux in isobutyl alcohol or 2-methylbutan-1-ol the novel cluster monoanions [Os 9(CO)21CHC(R)CH]- (R = Me or Et respectively) are produced in low yield; X-ray analyses of the [N(Ph3P) 2]+ salts of both monoanions show that they both have the same unusual Os9 core with 2 cluster valence-electrons less than the number predicted by the effective atomic number (E.A.N.) rule
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Synthesis, photophysical properties, and nanocrystal formation of a new class of tetra-n-substituted perylenes
No full textA new class of perylene-derived dyes, tetra (carboxamido) perylenes, has been obtained by a generally applicable synthetic method. Derivative A is shown to form nanocrystalline aggregates in DMSO which display significantly modified photophysical behavior with respect to the monomer and were studied by using atomic force microscopy techniques
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