Transfer From Print to Electronic Serials

Comparing the average cost per download for electronic journal packages to the average Interlibrary Loan cost can be both grossly inaccurate and wildly misleading. If forces one to accept the following assumptions: 1) aggregate online use can be compared with print use, 2) all journals cost the same and are used the same, and 3) the set of journals requested by Interlibrary Loan are similar to the set of journals subscribed by a library. This letter to the editor refutes each of these assumptions

Article duplication in Emerald/MCB journals is more extensive than first reported: Possible conflicts of financial and functional interests are uncovered

Article duplication within Emerald/MCB publications is more extensive than first reported. It has now been identified in 73 journals spanning a period from 1975 to 2003. This letter will address updates to the initial findings and react to Emerald?s response. It will investigate the relationships between Emerald, MCB and Barmarick Publications, and shed light on possible conflicts of interest in management functioning simultaneously as owners, editors and authors. Is this a case where commercial interests have outweighed editorial independence

Characterization of Monomethyihydrazine (MMH) Non-Volatile Residue

The Space Shuttle program has a unique propellant purity requirement for determination of nonvolatile residue (NVR) in monomethylhydrazine (MMH). TIis requirement differs from the Military Specification procurement specification by requiring a NVR analysis with a limit of less than or equal to 10 milligrams per liter. In June 2008, a routine MMH replenishment delivery was transferred into a NASA KSC owned tanker for future delivery to the Space Shuffle pad MMH storage tank. Per Shuffle standard operating procedure, the receiving tanker was sampled and analyzed for purity and surprisingly it failed the Shuttle use NVR specification limit. Detailed examination of the NVR revealed that it was fundamentally different than the typical MMH NVR. This paper will examine various aspects of NVR determination in MMH and the analytical characterization processes used to identify the NVR

Institutional Repositories: Evaluating the reasons for non-use of Cornell University's installation of DSpace

This article reports on a three-part evaluative study of institutional repositories. We describe the contents and participation in Cornell's DSpace and compare these results with seven university DSpace installations. Through in-depth interviews with eleven faculty members in the sciences, social sciences and humanities, we explore their attitudes, motivations, and behaviors for non-participation in institutional repositories

Structure Of 18'-Epivinblastine

Methyl {3aR-[3a-alpha,4-beta,5-beta,5a-beta,9(3R*,-5S*,7R*,9R*),10bR,13a-alpha]}-4-(acetyloxy)-3a-ethyl-9-[5-ethyl-1,4,5,6,7,8,9,10-octahydro-5-hydroxy-9-(methoxycarbonyl)-2H-3,7-methanoazacycloundecino[5,4-b]indol-9-yl]-3a,4,5,5a,6,11,12,13a-octahydro-5-hydroxy-8-methoxy-6-methyl-lH-indolizino-[8,1-c,d]carbazole-5-carboxy?? late methanol solvate, C46H58N4O9.2CH3OH (1), M(r) = 875.07, monoclinic, P2(1), a = 10.2759 (12), b = 22.353 (3), c = 10.4051 (12) angstrom, beta = 106.502 (9)-degrees, V = 2291.6 (5) angstrom 3, Z = 2, D(x) = 1.27 g cm-3, Mo K-alpha radiation, lambda = 0.7107 angstrom, mu = 0.8397 cm-1, F(000) = 940, T = 198 K, R = 0.0470 for 2751 reflections, F(o) greater-than-or-equal-to 4-sigma-(F(o)). The C ring of the vindoline moiety is in the boat conformation with the hydroxy group and the tertiary N in the bowsprit positions resulting in a fairly short intramolecular hydrogen-bonding interaction. The relevant parameters for O3-H3...N9 are O...N 2.651 (6), H...N 1.94 (5) angstrom and O-H...N 147 (5)-degrees. The D and E rings are in the sofa and envelope conformations, respectively. The piperidine ring of the catharanthine portion of the molecule assumes the chair conformation while the conformation of the azacyclononene ring is a boat-chair. An intramolecular hydrogen bond between the indolino NH of the catharanthine moiety and methoxy O (O25) of the vindoline moiety is also observed. The relevant parameters for N16'-H16'...O25 are N...O 2.827 (6), H...N2.14 (6) angstrom and O-H...N 136 (5)-degrees.National Institutes of Health (GM 29801)ChemistryBiochemistr

Why do spatial abilities predict mathematical performance?

Spatial ability predicts performance in mathematics and eventual expertise in science, technology and engineering. Spatial skills have also been shown to rely on neuronal networks partially shared with mathematics. Understanding the nature of this association can inform educational practices and intervention for mathematical underperformance. Using data on two aspects of spatial ability and three domains of mathematical ability from 4174 pairs of 12-year-old twins, we examined the relative genetic and environmental contributions to variation in spatial ability and to its relationship with different aspects of mathematics. Environmental effects explained most of the variation in spatial ability (~70%) and in mathematical ability (~60%) at this age, and the effects were the same for boys and girls. Genetic factors explained about 60% of the observed relationship between spatial ability and mathematics, with a substantial portion of the relationship explained by common environmental influences (26% and 14% by shared and non-shared environments respectively). These findings call for further research aimed at identifying specific environmental mediators of the spatial–mathematics relationship