Hasil untuk "hep-ex"

S. Holmes, R. Alber, B. Chase et al.

Part 1 of "Project X: Accelerator Reference Design, Physics Opportunities, Broader Impacts". Part 1 contains the volume Preface and a description of the conceptual design for a high-intensity proton accelerator facility being developed to support a world-leading program of Intensity Frontier physics over the next two decades at Fermilab. Subjects covered include performance goals, the accelerator physics design, and the technological basis for such a facility. Part 2 is available as arXiv:1306.5009 [hep-ex] and Part 3 is available as arXiv:1306.5024 [physics.acc-ph].

T. Araki

Liu Jin-hu

Nibir Bora, B. P. Mishra, Satchidananda Dehuri

Abstract Document clustering deals with assigning documents to groups (called clusters) in accordance with the general clustering rule, ‘high intra-cluster document similarity and low inter-cluster document similarity’. In this study, we propose a novel heuristics for clustering news headlines. News headlines are grammatically and semantically different from larger bodies of text, like blog posts and reviews. Based on the heuristics, we implemented versions of the frequent term-based and frequent noun-based clustering algorithms. Both these algorithms, along with k-means, regular frequent term and frequent noun clustering were evaluated using five datasets -Reuters343, Reuters2388 (news headlines), CICLing-2002, Hep-ex and KnCr (scientific abstracts). On interpreting the results based on common external cluster quality evaluation measures (purity, entropy and F measure), it was found that the heuristics performed at par with, or even better than, traditional clustering algorithms and few other intuitive algorithms, when tested using the datasets comprising of news headlines. However, on using the datasets comprising of scientific abstracts, the results were not favorable.

J. Julius, A. Gaikwad, A. Lowry et al.

Seong-youl Choi

B. Zhuikov

S. Fang

L. Ding, Qian Hou, Qi-yin Zhou et al.

D. Fang, Han-Cheng Liu, Sun Yang et al.

L. Risegari, M. Barucci, L. Lolli et al.

Gui-Jun Ding, R. Ping, M. Yan

Abstract.X(1835) has been treated as a baryonium with sizable gluon content, and to be almost flavor singlet. This picture allows us to rationally understand X(1835) production in J/ψ radiative decays, and its large couplings with p¯, η′ππ. The processes ϒ(1S) → γX(1835) and J/ψ → ωX(1835) have been examined. It has been found that Br(ϒ(1S) → γX(1835))Br(X(1835) → p¯) < 6.45×10-7, which is compatible with CLEO's recent experimental result (Phys. Rev. D 73, 032001 (2006) hep-ex/0510015). The branching fractions Br(J/ψ → ωX(1835)), Br(J/ψ → ρX(1835)) with X(1835) → p¯ and X(1835) → η′π+π- have been estimated by the quark-pair creation model. We show that they are heavily suppressed, so the signal of X(1835) is very difficult, if not impossible, to be observed in these processes. The experimental checks for these estimations are expected. The existence of the baryonium nonet is conjectured, and a model-independent derivation of their production branching fractions is presented.

J. Kaspar, M. Ryšavý, A. Špalek et al.

T. Shiraga, T. Niwa, Y. Teramura et al.

C. Nojiri, T. Okano, K. Park et al.

I. Vulić, T. Okano, F. J. Gaag et al.

A. Mackiewicz, M. Sobieska, M. Kapcinska et al.

Arturo Montejo-Ráez, L. A. U. López

H. Simgen

J. Engel, G. L. Merrill

Telaranea consobrina, T fragilis, and T palmata, new species from Australasia, are described and illustrated. Telaranea clatritexta (Stephani) Engel & Merrill and T quadricilia (Stephani) Engel & Merrill of Australasia and T. fernandeziensis (Stephani) Engel & Merrill from Juan Fernmindez are new combinations. Frullania neocaledonica of New Caledonia is proposed as a new name for Frullania caledonica (Schuster) Schuster, an illegitimate name. The following new taxa and new combinations, together with those previously published (Engel & Merrill, 1995), are the result of a phylogenetic study of the genus Telaranea, which is currently in preparation by the authors. The names are here published separately to make them immediately available for use. Studies on Australasian Hepaticae have also revealed a nomenclatural change required in the genus Frullania. Telaranea clatritexta (Stephani) Engel & Merrill, comb. nov. Basionym: Lepidozia clatritexta Stephani, Spec. Hep. 3: 583. 1909. TYPE: Australia. Western Australia: Swan River, Drummond, ex Herb. Kew (G). Lepidozia complanata Herzog, Memoranda Soc. Fauna F1. Fenn. 27(1950-1951): 92. fig. 39. 1952. Syn. nov. Telaranea complanata (Herzog) Engel & Merrill, Phytologia 79: 251. 1995 [June 1996]. TYPE: Australia. Western Australia: without specific loc., Goebel (holotype, not seen). In a previous paper (Engel & Merrill, 1995), we published the combination Telaranea complanata (Herzog) Engel & Merrill. Further studies have revealed that Lepidozia clatritexta Stephani is the same taxon, and a transfer to Telaranea is therefore required. Telaranea consobrina Engel & Merrill, sp. nov. TYPE: Tasmania. Eastern slope of Black Bluff just below summit, S of Bumrnie, 1250 m, 21 Mar. 1977, Engel 15799 (holotype, F; isotype, HO). Figure 1. Species nova T. meridianae affinis disco folii basin versus 8 cellulis lato, lobis angustioribus, amphigastriis latioribus brevioribusque, hyalodermate conspicuo differt. Plants soft and flexuous, ascending to suberect, pale green, medium in size, to 6 mm wide, including branches. Branching rather regularly 1-pinnate, the branches of the Frullania-type, at times becoming flagelliform; first branch underleaf undivided (very rarely bilobed), broadly acuminate to lanceolate. Ventral-intercalary branches not seen. Stems with cortical cells distinctly differentiated, thinwalled, in 13-14 rows; cortical cells in section slightly to distinctly larger than the numerous (4953) medullary cells. Leaves on main shoot obliquely spreading, contiguous, the disc plane or weakly convex, the lobes ventrally decurved, the insertion distinctly incubous, the disc broader than high; leaves 475-600 /m wide x 440-525 /m long, the leaves 4(5)-lobed to 0.4-0.5, the lobes straight to moderately divergent. Lobes narrowly acute to acuminate, 4-5 cells wide at base, often 4 cells wide in basal sector, then biseriate for 2-3 tiers, terminating in a short uniseriate row of 2-3 cells (or sporadically a single cell or 2 laterally juxtaposed cells); lobe cells ? isodiametric to short rectangular, thin-walled. Leaf disc somewhat asymmetrically cuneate, the disc (5)6-7(8) cells high (from median sinus base to leaf base), 13-16 cells wide in distal portion narrowing to 8(9) cells wide in basal portion. Cells of disc thin-walled, median cells short rectangular, 24-38(42) /m wide x 42-49 /m long, the cells in + irregular rows; cuticle smooth. Underleaves somewhat smaller than leaves, 1.7-2.3x stem width, 4(5)-lobed to 0.4-0.45, the lobes narrowly acut , 3-4 cells wide at base and biseriate for 1-2 tiers, ending in a uniseriate row of 2-3 short cells; disc symmetrically broadly cuneate (wider than high), 4-5 cells high (median sinus), 14-18 cells wide. Asexual reproduction lacking. Androecia and gynoecia not seen. Taxonomy. This species strongly resembles T meridiana of New Zealand, with broad, almost lonNOVON 9: 339-344. 1999. This content downloaded from 207.46.13.110 on Fri, 09 Dec 2016 05:48:26 UTC All use subject to http://about.jstor.org/terms