161,924 research outputs found
Jurataenionema Liu and Ren
No full textGenus Jurataenionema Liu and Ren, gen. nov. Type species. Jurataenionema inornatus Liu and Ren, sp. nov. Etymology. The generic name is taken from the combination of Jura and T aenionema (a genus of Taeniopterygidae) Species included. The type species J. inornatus Liu and Ren, sp. nov. and J. stigmaeus Liu and Ren, sp. nov. Diagnosis. Wings are macropterous, translucent. No additional veinlets on the costal area, c–r present or very faint, sometimes grey pterostigma presents in the terminal space of forewings; Rs with three branches, M and CuA with two long branches, and fork at level of midlength of Rs stem; 5–8 crossveins in the median and cubital areas. Ninth sternite produced, with a median tongue–like erect and then bent forward extension tapering to around or cuspidal tip, tenth tergite transversely wide, sclerotized. Cerci short, eight to ten segments. Remarks. The new genus Jurataenionema differs from the extant genera by the longer cerci and long branches of CuA; differs from the extinct Gurvanopteryx by Rs with three branches and the longer first segment of hind tarsus; differs from the extinct Positopteryx by c–r present, Rs with three branches.Published as part of Liu, Yushuang, Sinitshenkova, Dong Ren Nina D. & Shih, Chung Kun, 2007, The oldest known record of Taeniopterygidae in the Middle Jurassic of Daohugou, Inner Mongolia, China (Insecta: Plecoptera), pp. 1-8 in Zootaxa 1521 on page 2, DOI: 10.5281/zenodo.17745
"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.
?Ren? Depestre, Eros in un treno cinese, trad. di Anna Devoto, Jaca Book?
No full textPresentation of the book "Eros in un treno cinese" of the author Ren? Depestre, translated by Anna Devoto.Presentazione del romanzo "Eros in un treno cinese" dell\u27autore Ren? Depestre, tradotto da Anna Devoto
Praearchitipula abnormis Hao & Ren 2009
No full textPraearchitipula abnormis (Hao & Ren, 2009) —comb. nov. (Fig. 2) Architipula abnormis Hao & Ren, 2009: 172, figs 1–9. Remarks. Architipula abnormis Hao & Ren, 2009 from the late Middle Jurassic Jiulongshan Formation of Daohugou (China) was previously regarded as a member of the Limoniidae. After re-examining the holotype of A. abnormis, we found that the cross-vein sc-r was omitted in the original description (Fig. 2). It has a presectoral position and we propose to transfer this species from Limoniidae to Pediciidae. This species corresponds mostly to the generic characters of Praearchitipula Kalugina, 1985, such as Rs bifurcating into a long R 2 + 3 and a short R 4 + 5; cross-vein r-m between R 5 and M 1 + 2. It differs from other species of Praearchitipula in the shorter length of d-cell, which is about 1 / 13 the length of wing.Published as part of Gao, Jiaqi, Shih, Chungkun, Kopeć, Katarzyna, Krzemiński, Wiesław & Ren, Dong, 2015, New species and revisions of Pediciidae (Diptera) from the Middle Jurassic of northeastern China and Russia, pp. 240-249 in Zootaxa 3963 (2) on page 243, DOI: 10.11646/zootaxa.3963.2.5, http://zenodo.org/record/23628
Phenotypic dissection of the mouse Ren-1(d) knockout by complementation with human renin
No full textNormal renin synthesis and secretion is important for the maintenance of juxtaglomerular apparatus architecture. Mice lacking a functional Ren-1(d) gene are devoid of renal juxtaglomerular cell granules and exhibit an altered macula densa morphology. Due to the species-specificity of renin activity, transgenic mice are ideal models for experimentally investigating and manipulating expression patterns of the human renin gene in a native cellular environment without confounding Renin-angiotensin-system interactions. A 55 kb transgene encompassing the human renin locus was crossed onto the mouse Ren-1(d)-null background, restoring granulation in juxtaglomerular cells. Correct processing of human renin in dense core granules was confirmed by immunogold labelling. After stimulation of the renin-angiotensin system, juxtaglomerular cells contained rhomboid protogranules with paracrystalline contents, dilated rough endoplasmic reticulum and electron-lucent granular structures. However, complementation of Ren-1(d-/-) mice with human renin was unable to rescue the abnormality seen in macula densa structure. The juxtaglomerular apparatus was still able to respond to tubuloglomerular feedback in isolated perfused juxtaglomerular apparatus preparations, although minor differences in glomerular tuft contractility and macula densa cell calcium handling were observed. This study reveals that the human renin protein is able to complement the mouse Ren-1(d-/-) non-granulated defect and suggests that granulopoiesis requires a structural motif that is conserved between the mouse Ren-1(d) and human renin proteins. It also suggests that the altered macula densa phenotype is related to the activity of the renin-1d enzyme in a local juxtaglomerular renin-angiotensin system.</p
Jurataenionema stigmaeus Liu and Ren, sp. nov.
No full textJurataenionema stigmaeus Liu and Ren, sp. nov. Figs. 3–5 Etymology. From Latin stigmaeus, refers to the presence of a fuscous stigma in the terminal space of forewings. Materials. Holotype, female. CNU, NMDHG 183, a well–preserved body with part of wings, and paratypes (Imagoes) from the same locality: CNU, NMDHG 99, and CNU, NMDHG 184–187. Description. Length of body 14 mm, to tip of wings 18 mm. Head large, triangular, the posterior part not twice as wide as the anterior; antennae long. Prothorax narrow, two–thirds of the mesothorax; mesothorax and metathorax developed, same width. Legs robust. Forewings 15 mm length. Sc connected to R at almost two–thirds total wing length; c–r far from the Sc tip, grey pterostigma present; Rs forks distinctly after the r–rs, and its anterior branch forks again close to the Rs forks. Crossvein r–rs short, almost perpendicular to Rs. M appears 2 –branched, forking from the proximal 1 / 3 of the wing, its branches are nearly twice as long as Rs branches, rs–m straight, connects Rs before r–rs and terminates at the one fifth of MA. Crossvein m–cua S–shaped, connecting M stem or MP, and terminated the stem of CuA. CuA forks close to M forks, with long anterior branch. 4 crossveins at the median area, 7 crossveins at the cubital areas. Abdomen with 10 visible segments, almost 1.7 times as long as thorax. Ninth sternite produced as a subgenital plate, the median tongue upturned, triangular. Cerci short, eight or nine segments. Remarks. The new species J. stigmaeus differs from the type species by the defined pterostigma.Published as part of Liu, Yushuang, Sinitshenkova, Dong Ren Nina D. & Shih, Chung Kun, 2007, The oldest known record of Taeniopterygidae in the Middle Jurassic of Daohugou, Inner Mongolia, China (Insecta: Plecoptera), pp. 1-8 in Zootaxa 1521 on pages 3-4, DOI: 10.5281/zenodo.17745
Constructing a Distance Sensitivity Oracle in O(n^2.5794 M) Time
No full textWe continue the study of distance sensitivity oracles (DSOs). Given a directed graph G with n vertices and edge weights in {1, 2, … , M}, we want to build a data structure such that given any source vertex u, any target vertex v, and any failure f (which is either a vertex or an edge), it outputs the length of the shortest path from u to v not going through f. Our main result is a DSO with preprocessing time O(n^2.5794 M) and constant query time. Previously, the best preprocessing time of DSOs for directed graphs is O(n^2.7233 M), and even in the easier case of undirected graphs, the best preprocessing time is O(n^2.6865 M) [Ren, ESA 2020]. One drawback of our DSOs, though, is that it only supports distance queries but not path queries.
Our main technical ingredient is an algorithm that computes the inverse of a degree-d polynomial matrix (i.e. a matrix whose entries are degree-d univariate polynomials) modulo x^r. The algorithm is adapted from [Zhou, Labahn and Storjohann, Journal of Complexity, 2015], and we replace some of its intermediate steps with faster rectangular matrix multiplication algorithms.
We also show how to compute unique shortest paths in a directed graph with edge weights in {1, 2, … , M}, in O(n^2.5286 M) time. This algorithm is crucial in the preprocessing algorithm of our DSO. Our solution improves the O(n^2.6865 M) time bound in [Ren, ESA 2020], and matches the current best time bound for computing all-pairs shortest paths
Waltz me around again, Willie, around, around, around [first line of chorus]
No full textstrophic with choruspiano and voiceads on inside front, inside back, and on back covers for F.A. Mills stockJohns Hopkins University, Levy Sheet Music Collection, Box
150, Item 120Words by Will D. Cobb. Music by Ren Shields.Successfully Sung by Blanche Ring in Charles Dillingham's Production Miss Dolly Dollarsunattrib. photo of Rin
Blindus curvotibius Ren et Zhang 2010
No full textBlindus curvotibius Ren et Zhang, 2010 (Figs 1–11C) Blindus curvotibius REn & Zhang, 2010: 64. Material – 1 male, 1 female, JigongMountain, HenanProvince, China, 5. viii. 2004, Feng-YanWangleg. (MHBU); 1 female, Baotianman, NeixiangCounty, HenanProvince, China, 22. viii. 2008, Guo-DongRenleg. (MHBU). Distribution – China: Henan.Published as part of Liu, S. - S., G. - D & R, P., 2013, Taxonomy Of The Genus Blindus Mulsant Et Rey From China, With Description Of Two New Species (Coleoptera, Tenebrionidae, Pedinini), pp. 197-211 in Acta Zoologica Academiae Scientiarum Hungaricae 59 (3) on page 206, DOI: 10.5281/zenodo.573617
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
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