54,394 research outputs found
Finite Element Approximations for a linear Cahn-Hilliard-Cook equation driven by the space derivative of a space-time white noise
No full textWe consider an initial- and Dirichlet boundary- value problem for
a linear Cahn-Hilliard-Cook equation, in one space dimension,
forced by the space derivative of a space-time white noise.
First, we propose an approximate regularized stochastic parabolic
problem discretizing the noise using linear splines. Then
fully-discrete approximations to the solution of the
regularized problem are constructed using, for the discretization
in space, a Galerkin finite element method based on
piecewise polynomials, and, for time-stepping, the Backward
Euler method.
Finally, we derive strong a priori estimates for the modeling error and
for the numerical approximation error to the solution of the regularized problem
Metastable Innershell Molecular State (MIMS) IV: Heteronucleus K-shell MIMS with H+ and He+
No full textAbstractThe model of MIMS (Metastable Innershell Molecular State) has been applied to interpreting the Kα X-ray satellite data of target atoms in H+ and He+ ion impact on Al, Ca and Ti targets. The binding energies of the heteronucleus H-K-MIMS (K-shell MIMS formed with H and a target atom) and He-K-MIMS have been obtained. The binding energy trend of the H-K-MIMS shows a Z2 dependency similar to that of the homonucleus K-MIMS, while that of the He-K-MIMS shows a transitional behavior from the former to the latter. These behaviors were interpreted with the Z-expansion theory of heteronucleus molecules
Dallas Rapid Transit, ''Cyclone'' Locomotive No. 1
No full textDate obtained from years manufacturer operated under name listed on item. Source: http://www.pacificng.com/template.php?page=/ref/locobuilders/porter/index.htm Recto: [imprinted] H. K. Porter & Co. Builders of Light Locomotives and Noiseless Steam Motors. [descriptive text not trabscribed] Pitsburgh, Penn'a. Dallas Rapid Transit Cyclone. Windsor Hotel 1 Fair Grounds
Djeboa bomiensis Cook 1966
No full textDjeboa bomiensis (Cook, 1966) (Figs. 10 A–F) Mideopsis (Djeboa) bomiensis Cook 1966: 239. Material examined: Type series: FMC, Liberia; holotype female, Suehn road, approximately four miles north of Bomi Hills Road, 30.xi. 1957 Cook (Coll. 84); paratypes: same site and date as holotype 3 / 3 /0; Coll. 36, 1/0/0; Coll. 41, 1/0/0; Coll. 76, 0/ 1 /0; Coll. 83, 3/ 1 /0; Coll. 88, 1/ 4 /0; Coll. 89, 0/ 2 /0; Coll. 91, 0/ 1 /0; Coll. 93,3/ 2 /0; Coll. 94, 2/ 3 /0; Coll. 95, 1/ 2 /0; Coll. 96, 1/ 2 /0 (see Cook 1966 for more details). General features: Dorsal shield oval (L/W ratio 1.1–1.2), with medial depression (Fig. 10 A); muscle scars with slightly pronounced thickenings, located anterior and posterior to the postocularia; dorsal shield blue in colour except periphery; gnathosomal bay of a modified Y-shape, noticeably narrowing in posterior half; tips of Cx-I ending posterior to frontal margin; medial margin of Cx-IV reduced to a median angle; Cx-III and -IV with a few longitudinal striae (two pairs on Cx-IV). Palp (Fig. 10 D): P- 1 without a dorsal seta; P- 2 with straight ventral and convexly bowed dorsal margin; P- 3 maximum height proximally, ventral margin concave; P- 4 equally narrowing from the base to tip. Legs: I-L (Fig. 10 E) with I-L- 6 L/H ratio 2.6; IV-L: Fig. 10 F. Discussion: In shape and setation of palp (with P- 1 lacking seta), Djeboa bomiensis is similar to D. rotundata K. Viets, 1914. The latter differs most noticeably in the rounded shape of the idiosoma, and also in a more slender P- 3 and P- 4 (Cook 1966). A re-examination of type material shows that the statement of Cook (1966) that swimming hairs are absent in D. bomiensis (followed later in the key of K.O.Viets 1970) is erroneous. Distribution: Liberia, widely distributed and numerous.Published as part of Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, pp. 1-75 in Zootaxa 3720 (1) on page 22, DOI: 10.11646/zootaxa.3720.1.1, http://zenodo.org/record/28502
Djeboa unimaculata Cook 1966
No full textDjeboa unimaculata (Cook, 1966) (Figs. 34 A–F, 40 K–L) Mideopsis (Djeboa) unimaculata Cook, 1966: 236. Material examined: Type series: FMC, Liberia; holotype female, one mile north of Suehn, stream, 30.vi. 1958, Cook (Coll. 99); paratypes: same site as holotype, 20.ii. 1958 (Coll. 96); Coll. 88, 2/0/0 (details see Cook 1966). New records: Côte d’Ivoire, River N’zi near Fetekro (F), drift day, 13.i. 1977 Statzner 0/ 1 /0 (mounted); Ghana: Namini stream, Kakum NP, 5 º 23.396 N, 1 º 23.294 W, 12.ii. 2013 Smit 1 /0/0; Ankasa River, Ankasa NP, 5 º 13.011 N, 2 º 39.126 W, 13.ii. 2013 Smit 1 /0/0; tributary of Oguntwe, Ankasa NP, 5 º 16.563 N, 2 º 38.733 W, 78 m asl., 14.ii. 2013 Smit 0/ 1 /0; Ankasa Exploration Base stream, Ankasa NP, 5 º 16.413 N, 2 º 38.810 W, 81 m asl., 14.ii. 2013 Smit 1 / 1 /0; Ankasa Exploration Base trail stream, Ankasa NP, 5 º 16.415 N, 2 º 38.751 W, 80 m asl., 14.ii. 2013 Smit 1 / 1 /0; Plunge pool, Tsatsudo Falls, 7 º 07.390 N, 0º 23.365 E, 179 m asl., 22.ii. 2013 Smit 0/ 2 /0. General features: Dorsal shield oval (L/W ratio 1.1), with medial depression; muscle scars with little pronounced thickenings, located anterior and posterior to the postocularia; colour pattern consisting of an anterior blue patch (Figs. 40 K–L); gnathosomal bay Y-shaped, noticeably narrowing in posterior half; tips of Cx-I ending posterior to frontal margin; medial margin of Cx-IV reduced to a median angle; Cx-III and -IV with a series of longitudinal striae (four or five pairs on Cx-IV). Palp (Fig. 34 D): P- 1 with a dorsal seta; P- 2 with straight ventral and convexly bowed dorsal margin; P- 3 proximally thicker than distally, ventral margin concave; P- 4 slender, equally narrowing from the base to tip. Legs: I-L (Fig. 34 E) with I-L- 6 L/H ratio 2.0– 2.3, ventral margin strongly protruding; IV-L: Fig. 34 F. Remarks: The dorsal colour pattern of D. unimaculata resembles that of D. multidentata K. Viets, 1911, but in the latter the patch is violet in colour. Furthermore, the idiosoma of D. multidentata is much smaller and proportionally narrower and the palp segments are proportionally much shorter (Cook 1966). Distribution: Liberia (Cook 1966), Côte d’Ivoire (first record), Ghana (first record).Published as part of Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, pp. 1-75 in Zootaxa 3720 (1) on page 58, DOI: 10.11646/zootaxa.3720.1.1, http://zenodo.org/record/28502
Djeboa liberiensis Cook 1966
No full textDjeboa liberiensis (Cook, 1966) (Figs. 25 A–F) Mideopsis (Djeboa) liberiensis Cook, 1966: 234. Material examined: Type series: FMC, Liberia; holotype female, Bomi Hills road, stream at bridge 19, 8.xii. 1957, Cook (Coll. 85); paratypes: same date and site, 3 / 1 /0; same site, 6.i. 1957 (Coll. 27), 3 / 9 /0; same site, 23.i. 1957 (Coll. 36), 7 / 7 /0; Coll. 40, 1/0(0; Coll. 41, 8/ 8 /0; Coll. 42, 9/ 23 /0; Coll. 50, 0/ 3 /0; Coll. 51, 1/0/0; Coll. 74, 1/0/0; Coll. 76, 1/ 9 /0; Coll. 83, 0/ 2 /0; Coll. 84, 1/ 2 /0; Coll. 87, 2/ 2 /0; Coll. 88, 6/ 3 /0; Coll. 91, 6/ 5 /0; Coll. 92, 4/ 3 /0; Coll. 93, 1/ 13 /0; Coll. 94, 4/ 3 /0; Coll. 95, 1/0/0; Coll. 96, 1/ 2 /0; Coll. 98, 0/ 1 /0 (for details see Cook 1966). General features: Dorsal shield almost perfectly circular (L/W ratio 1.0), with extended medial depression occupying most of the shield (Fig. 25 A); muscle scars located anterior and posterior to the postocularia, with moderately pronounced thickenings; anterior and central portion of dorsal shield blue; edges of ventral shield with large serrations; gnathosomal bay Y-shaped, noticeably narrowing in posterior half; tips of Cx-I ending posterior to frontal margin; medial margin of Cx-IV reduced to a little more than median angle; Cx-III and -IV with a series of longitudinal striae (three pairs of on Cx-IV). Palp as shown in Fig. 25 D: P- 1 with a dorsal seta; P- 2 with straight ventral and convexly bowed dorsal margin; P- 3 proximally thicker than distally, ventral margin with an proximal inflation, distally slightly concave; P- 4 slender, equally narrowing from the base to tip. Legs: I-L (Fig. 25 E) with I- L- 6 dL/H ratio 2.6–2.7, ventral margin distally convexly protruding; IV-L: Fig. 25 F. Remarks: In the round idiosoma shape, D. liberiensis resembles D. multidentata (K. Viets, 1911) which differs in possessing a patch violet in colour on the anterior dorsum and larger dimensions (Cook 1966). Distribution: Obviously the most frequently collected and most widely distributed species in Liberia.Published as part of Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, pp. 1-75 in Zootaxa 3720 (1) on page 45, DOI: 10.11646/zootaxa.3720.1.1, http://zenodo.org/record/28502
Comparison of several author indices for gauging academic productivity
No full textBackground
Many author indices exist to gauge academic productivity. Several of these indices are calculated based upon an author's scholarly publication record, but the measurement methodology to calculate each index varies considerably, and the precise function being used, as well as the end result, is often complex and difficult to assess.
Method
Two straightforward methods to weigh author productivity from the publication and citation record were evaluated as possible means for providing a clearer assessment of scholarly activity. The author characteristic index (termed c-index) assigns author rank for each publication based upon author position. The characteristic prime (c') -index normalizes author rank from author position, so that the total weight per publication is unity. The top 10 scholars with keyword 'celiac disease' in the Google Scholar database were then assessed using these metrics. Rankings according to total number of publications, h-index, and c- and c'-indices were compared, then tabulated along with total papers included for assessment, and mean values per paper for author position, number of authors, citations, and year of publication.
Results
The order of the top ten authors with keyword 'celiac disease' varied substantially depending upon whether the h-index, c-index, or c'-index was used as a gauge. The characteristic indices assign credit to authors according to their position in an author list. The affiliated metrics provided a more complete picture of scholarly activity.
Conclusions
Academic achievement by scholars, based upon quantitative publication characteristics, has recently become of interest for evaluating job candidates, for determining work performance, and for bestowing awards and honors. The characteristic indices as described herein are readily calculated and interpreted, and may improve the assessment of scholarly activity
Djeboa expansipalpis Cook 1966
No full textDjeboa expansipalpis (Cook, 1966) (Figs. 19 A–F, 37 F) Mideopsis (Djeboa) expansipalpis Cook 1966: 232. Material examined: Type series: FMC, Liberia; holotype female, Bomi Hills Road, stream at bridge 132, 31.i. 1958, Cook (Coll. 93); paratypes: same data as holotype, 2 / 2 /0; Coll. 50, 0/ 1 /0; Coll. 74, 0/ 1 /0; Coll. 86, 0/ 1 /0; Coll. 88 0/ 1 /0; Coll.92, 1/ 2 /0; Coll. 95, 1/0/0 (for details see Cook 1966). New records: Côte d’Ivoire, River N’zi near Tinbé, (T) drift day, 11.vii. 1977 Statzner 0/ 1 /0 (mounted). General features: Dorsal shield oval (L/W ratio 1.1–1.2), with medial depression; muscle scars anterior and posterior to postocularia with well pronounced thickenings; second pair of muscle scars extending to the edge of dorsal depression (Fig. 37 F); central portion of dorsal shield purple; gnathosomal bay V-shaped; tips of Cx-I ending slightly posterior to frontal margin; medial margins of Cx-IV reduced to a median angle and well separated from each other; posterior margin of Cx-IV extending posterolaterally. Palp (Fig. 19 D): P- 1 with a dorsal seta; P- 2 strongly inflated, with straight ventral and convexly bowed dorsal margin; P- 3 much higher proximally than ventrally, ventral margin slightly concave, dorsal margin strongly convex; P- 4 slender, basally thickened, from here to anterior tip equally narrowed. Legs: I-L (Fig. 19 E) with I-L- 6 L/H ratio 2.0, ventral margin distally convexly protruding; IV-L: Fig. 19 F. Discussion: The present species is similar to Djeboa compressa K. Viets, 1914 in shape of idiosoma and palp (P- 1 with dorsal seta, P- 4 slender, much longer than high) but differs in dorsal muscle scars, more pronounced and purple rather than blue, central portion of dorsal shield, the medial margins of Cx-IV more distanced from each other, and P- 3 even more expanded and lacking the characteristic dorsal indentation. Distribution: Liberia; first record from Côte d’Ivoire.Published as part of Pešić, Vladimir, Cook, David, Gerecke, Reinhard & Smit, Harry, 2013, The water mite family Mideopsidae (Acari: Hydrachnidia): a contribution to the diversity in the Afrotropical region and taxonomic changes above species level, pp. 1-75 in Zootaxa 3720 (1) on page 35, DOI: 10.11646/zootaxa.3720.1.1, http://zenodo.org/record/28502
Export Performance in South Pacific Countries With Inadequate Endowments of Natural Resources: Cook Islands, Kiribati, Niue and Tuvalu, 1960 to 1999
No full textStochastic dominance analysis was used to assess export performance in four South Pacific island countries with very limited natural resources: Cook Islands; Kiribati; Niue; and Tuvalu. Total export values declined significantly over the study period in all four countries, brought about by a significant decline in the value of agricultural exports while non-agricultural exports showed only small increases. Results seem to confirm the view that these countries have insufficient natural resource endowments for sustainable economic development without outside support. The fisheries sector holds the key to whether the economies under study (bar Niue) can transform themselves into productive ones by exploiting further the fishery resources within their EEZs to develop domestic fishing industries.export performance, Cook Islands, Kiribati, Niue, stochastic dominance, Tuvalu, International Relations/Trade,
Semantic evaluation of syntactic structure. Evidence from eye movements
No full textFrazier L, Carminati MN, Cook A, Majewski H, Rayner K. Semantic evaluation of syntactic structure. Evidence from eye movements. Cognition. 2006;99(2):B53-B62
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