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Journal articles on the topic 'Fibred threefold'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Thompson, Alan. "Explicit Models for Threefolds Fibred by K3 Surfaces of Degree Two." Canadian Journal of Mathematics 65, no. 4 (2013): 905–26. http://dx.doi.org/10.4153/cjm-2012-037-2.

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AbstractWe consider threefolds that admit a fibration by K3 surfaces over a nonsingular curve, equipped with a divisorial sheaf that defines a polarization of degree two on the general fibre. Under certain assumptions on the threefold we show that its relative log canonical model exists and can be explicitly reconstructed from a small set of data determined by the original fibration. Finally, we prove a converse to this statement: under certain assumptions, any such set of data determines a threefold that arises as the relative log canonical model of a threefold admitting a fibration by K3 sur

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2

XU, JINSONG. "The third and fourth pluricanonical maps of threefolds of general type." Mathematical Proceedings of the Cambridge Philosophical Society 157, no. 2 (2014): 209–20. http://dx.doi.org/10.1017/s0305004114000267.

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AbstractFor a nonsingular projective threefold of general typeXover the field of complex numbers, we show that the fourth pluricanonical map ϕ4is not birational onto its image if and only ifXis birationally fibred by (1,2)-surfaces, provided that vol(X) ≥ 303. We also have similar characterization of birationality of ϕ3.

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3

Bera, Swagata, Dibya Chakraborty, George K. Leontaris, and Pramod Shukla. "Inflating in perturbative LVS: global embedding and robustness." Journal of Cosmology and Astroparticle Physics 2024, no. 09 (2024): 004. http://dx.doi.org/10.1088/1475-7516/2024/09/004.

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Abstract The perturbative LARGE volume scenario (LVS) is a promising moduli stabilisation scheme in which the overall volume modulus of the compactifying Calabi-Yau (CY) threefold is dynamically stabilised to exponentially large values via using only perturbative corrections. In this article, using an orientifold of a K3-fibred CY threefold, we present the global embedding of an inflationary model proposed in the framework of perturbative LVS, in which the overall volume modulus acts as the inflaton field rolling on a nearly flat potential induced by a combination of the α '3-corrections and t

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4

HUNT, BRUCE. "K3-FIBERED CALABI–YAU THREEFOLDS II: SINGULAR FIBERS." International Journal of Mathematics 10, no. 07 (1999): 871–96. http://dx.doi.org/10.1142/s0129167x99000379.

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5

Duneau, Michel, and Marc Audier. "Quasiperiodic packings of fibres with icosahedral symmetry." Acta Crystallographica Section A Foundations of Crystallography 55, no. 4 (1999): 746–54. http://dx.doi.org/10.1107/s0108767399001142.

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Different icosahedral packings of fibres have been experimentally realized. A packing construction with straight fibres of the same circular cross section, only parallel to fivefold icosahedral axes and respecting the closest packing condition, is reported. Its characteristics of point-group symmetry and related two-dimensional tilings are analysed. But for determining unambiguously all the fibre positions it appears that a mathematical construction has to be made from the cut and projection of a five-dimensional space. Through such a method, the volume fraction of fibrous reinforcement in a c

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6

Colliot-Thélène, Jean-Louis, and Bruno Kahn. "Cycles de codimension 2 et H3 non ramifié pour les variétés sur les corps finis." Journal of K-Theory 11, no. 1 (2013): 1–53. http://dx.doi.org/10.1017/is012009001jkt194.

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AbstractLet X be a smooth projective variety over a finite field $\mathbb{F}$. We discuss the unramified cohomology group H3nr(X, ℚ/ℤ(2)). Several conjectures put together imply that this group is finite. For certain classes of threefolds, H3nr(X, ℚ/ℤ(2)) actually vanishes. It is an open question whether this holds for arbitrary threefolds. For a threefold X equipped with a fibration onto a curve C, the generic fibre of which is a smooth projective surface V over the global field $\mathbb{F}$(C), the vanishing of H3nr(X, ℚ/ℤ(2)) together with the Tate conjecture for divisors on X implies a loc

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7

ANDREAS, BJÖRN, GOTTFRIED CURIO, and ALBRECHT KLEMM. "TOWARDS THE STANDARD MODEL SPECTRUM FROM ELLIPTIC CALABI–YAU MANIFOLDS." International Journal of Modern Physics A 19, no. 12 (2004): 1987–2014. http://dx.doi.org/10.1142/s0217751x04018087.

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We show that it is possible to construct supersymmetric three-generation models with the Standard Model gauge group in the framework of non-simply-connected elliptically fibered Calabi–Yau threefolds, without section but with a bi-section. The fibrations on a cover Calabi–Yau threefold, where the model has six generations of SU(5) and the bundle is given via the spectral cover description, use a different description of the elliptic fiber which leads to more than one global section. We present two examples of a possible cover Calabi–Yau threefold with a free involution: one is a fiber product

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8

BARJA, MIGUEL A. "LOWER BOUNDS OF THE SLOPE OF FIBRED THREEFOLDS." International Journal of Mathematics 11, no. 04 (2000): 461–91. http://dx.doi.org/10.1142/s0129167x00000234.

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We study from a geographical point of view fibrations of threefolds over smooth curves f:T→B such that the general fibre is of general type. We prove the non-negativity of certain relative invariants under general hypotheses and give lower bounds for [Formula: see text] depending on other relative invariants. We also study the influence of the relative irregularity q(T)-g(B) on these bounds. A more detailed study of the lowest cases of the bounds is given.

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9

Szendrői, Balázs. "Sheaves on Fibered Threefolds and Quiver Sheaves." Communications in Mathematical Physics 278, no. 3 (2008): 627–41. http://dx.doi.org/10.1007/s00220-007-0408-y.

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10

Oguiso, Keiji. "On certain rigid fibered Calabi-Yau threefolds." Mathematische Zeitschrift 221, no. 1 (1996): 437–48. http://dx.doi.org/10.1007/bf02622125.

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11

Oguiso, Keiji. "On certain rigid fibered Calabi–Yau threefolds." Mathematische Zeitschrift 221, no. 3 (1996): 437–48. http://dx.doi.org/10.1007/pl00004519.

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12

Doran, C. F., A. Harder, A. Y. Novoseltsev, and A. Thompson. "Calabi–Yau threefolds fibred by mirror quartic K3 surfaces." Advances in Mathematics 298 (August 2016): 369–92. http://dx.doi.org/10.1016/j.aim.2016.03.045.

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13

Pukhlikov, A. V. "Birational automorphisms of algebraic threefolds fibred by cubic surfaces." Russian Mathematical Surveys 52, no. 1 (1997): 230–31. http://dx.doi.org/10.1070/rm1997v052n01abeh001758.

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14

GOTO, YASUHIRO, REMKE KLOOSTERMAN, and NORIKO YUI. "ZETA-FUNCTIONS OF CERTAIN K3-FIBERED CALABI–YAU THREEFOLDS." International Journal of Mathematics 22, no. 01 (2011): 67–129. http://dx.doi.org/10.1142/s0129167x11006726.

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We consider certain K3-fibered Calabi–Yau threefolds. One class of such Calabi–Yau threefolds is constructed by Hunt and Schimmrigk using twist maps. They are realized in weighted projective spaces as orbifolds of hypersurfaces. Our main goal of this paper is to investigate arithmetic properties of these K3-fibered Calabi–Yau threefolds. In particular, we give detailed discussions on the construction of these Calabi–Yau varieties, singularities and their resolutions. We then determine the zeta-functions of these Calabi–Yau varieties. Next we consider deformations of our K3-fibered Calabi–Yau t

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15

Quintero Vélez, Alexander, and Alex Boer. "Noncommutative Resolutions of ADE Fibered Calabi-Yau Threefolds." Communications in Mathematical Physics 297, no. 3 (2010): 597–619. http://dx.doi.org/10.1007/s00220-010-1052-5.

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16

Mazur, Karolina, Stanislaw Kuciel, and Kamila Salasinska. "Mechanical, fire, and smoke behaviour of hybrid composites based on polyamide 6 with basalt/carbon fibres." Journal of Composite Materials 53, no. 28-30 (2019): 3979–91. http://dx.doi.org/10.1177/0021998319853015.

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This paper describes the hybridization of basalt and carbon fibres in polyamide 6 by injection moulding method and the analyses of the mechanical, morphological, fire, and smoke properties of the obtained materials. The content of basalt/carbon fibres in hybrid composites amounted to 5/5 wt%, 7/7 wt%, and 10/10 wt%. The addition of fibres resulted in an increase in mechanical properties of the examined materials, was reflected by the threefold increase of Young modulus for the composites containing 10/10 wt% of fibres. To investigate the aging, the samples were stored in distilled water for 1,

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17

Audier, Marc, and Michel Duneau. "Icosahedral quasiperiodic packing of fibres parallel to fivefold and threefold axes." Acta Crystallographica Section A Foundations of Crystallography 56, no. 1 (2000): 49–61. http://dx.doi.org/10.1107/s0108767399010533.

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18

HUNT, BRUCE, and ROLF SCHIMMRIGK. "K3-FIBERED CALABI–YAU THREEFOLDS I: THE TWIST MAP." International Journal of Mathematics 10, no. 07 (1999): 833–69. http://dx.doi.org/10.1142/s0129167x99000367.

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19

Turchet, Amos. "Fibered threefolds and Lang-Vojta’s conjecture over function fields." Transactions of the American Mathematical Society 369, no. 12 (2017): 8537–58. http://dx.doi.org/10.1090/tran/6968.

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20

Braun, A. P., S. Gerigk, A. Hebecker, and H. Triendl. "D7-brane moduli vs. F-theory cycles in elliptically fibred threefolds." Nuclear Physics B 836, no. 1-2 (2010): 1–36. http://dx.doi.org/10.1016/j.nuclphysb.2010.04.008.

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21

Doran, Charles F., Andrew Harder, Andrey Y. Novoseltsev, and Alan Thompson. "Calabi–Yau threefolds fibred by high rank lattice polarized K3 surfaces." Mathematische Zeitschrift 294, no. 1-2 (2019): 783–815. http://dx.doi.org/10.1007/s00209-019-02279-9.

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22

Catanese, Fabrizio, and Frédéric Mangolte. "Real singular Del Pezzo surfaces and threefolds fibred by rational curves, I." Michigan Mathematical Journal 56, no. 2 (2008): 357–73. http://dx.doi.org/10.1307/mmj/1224783518.

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23

Ovrut, Burt A., René Reinbacher, and Tony Pantev. "Torus-Fibered Calabi-Yau threefolds with non-trivial fundamental group." Journal of High Energy Physics 2003, no. 05 (2003): 040. http://dx.doi.org/10.1088/1126-6708/2003/05/040.

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24

Ekedahl, Torsten, Trygve Johnsen, and Dag Einar Sommervoll. "Isolated rational curves on K 3-fibered Calabi-Yau threefolds." manuscripta mathematica 99, no. 1 (1999): 111–33. http://dx.doi.org/10.1007/s002290050165.

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25

CHEN, MENG, and ZHIJIE J. CHEN. "Irregularity of canonical pencils for a threefold of general type." Mathematical Proceedings of the Cambridge Philosophical Society 125, no. 1 (1999): 83–87. http://dx.doi.org/10.1017/s0305004198002734.

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Let X be a complex nonsingular projective threefold of general type. Suppose the canonical system of X is composed of a pencil, i.e. dimΦ∼KX∼(X)=1. It is often important to understand birational invariants of X such as pg(X), q(X), h2(OX) and χ(OX) etc. In this paper, we mainly study the irregularity of X.We may suppose that ∼KX∼ is free of base points. There is a natural fibration f[ratio ]X→C onto a nonsingular curve after the Stein factorization of Φ∼KX∼. Let F be a general fibre of f, then we know that F is a nonsingular projective surface of general type. Set b[ratio ]=g(C) and pg(F), q(F

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26

NAKASHIMA, TOHRU. "MODULI SPACES OF STABLE BUNDLES ON K3 FIBERED CALABI–YAU THREEFOLDS." Communications in Contemporary Mathematics 05, no. 01 (2003): 119–26. http://dx.doi.org/10.1142/s0219199703000884.

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In this paper we study stable rank two bundles on a Calabi–Yau threefold. For hypersurfaces in a ℙ3-bundle over ℙ1, we show that their moduli spaces have irreducible components which are birational to projective spaces.

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27

Wilson, P. M. H. "The existence of elliptic fibre space structures on Calabi-Yau threefolds." Mathematische Annalen 300, no. 1 (1994): 693–703. http://dx.doi.org/10.1007/bf01450510.

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28

Schütt, Matthias. "On the Modularity of Three Calabi–Yau Threefolds With Bad Reduction at 11." Canadian Mathematical Bulletin 49, no. 2 (2006): 296–312. http://dx.doi.org/10.4153/cmb-2006-031-9.

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AbstractThis paper investigates the modularity of three non-rigid Calabi–Yau threefolds with bad reduction at 11. They are constructed as fibre products of rational elliptic surfaces, involving the modular elliptic surface of level 5. Their middle ℓ-adic cohomology groups are shown to split into two-dimensional pieces, all but one of which can be interpreted in terms of elliptic curves. The remaining pieces are associated to newforms of weight 4 and level 22 or 55, respectively. For this purpose, we develop a method by Serre to compare the corresponding two-dimensional 2-adic Galois representa

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29

Grassi, Antonella, and David R. Morrison. "Group representations and the Euler characteristic of elliptically fibered Calabi--Yau threefolds." Journal of Algebraic Geometry 12, no. 2 (2003): 321–56. http://dx.doi.org/10.1090/s1056-3911-02-00337-5.

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30

WILSON, P. M. H. "The existence of elliptic fibre space structures on Calabi–Yau threefolds, II." Mathematical Proceedings of the Cambridge Philosophical Society 123, no. 2 (1998): 259–62. http://dx.doi.org/10.1017/s030500419700220x.

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31

Mikołajczyk, Zbigniew, Katarzyna Pieklak, and Aleksandra Roszak. "Knitted Meshes for Reinforcing Building Composites." Fibres and Textiles in Eastern Europe 27, no. 4(136) (2019): 102–11. http://dx.doi.org/10.5604/01.3001.0013.1826.

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Modern technical textiles, including knitted fabrics, are widely used in the construction industry. Regarding textiles in concrete reinforcement, methods based on shredded fibres, meshes, reinforcing mats, woven textiles and knitted DOStapes are frequently used as underlays of concrete constructions. Textiles are also used in the reinforcement of fibrous FRP composites. The research presented focused on producing composites made of MapeiMapefill concrete mass with reinforcement in the form of three variants of knitted meshes made of 228 tex polyamide threads, polypropylene threads of 6.3 tex a

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32

Pinto, Rochele, Tatjana Glaskova-Kuzmina, Kristina Zukiene, et al. "Effect of Star-like Polymer on Mechanical Properties of Novel Basalt Fibre-Reinforced Composite with Bio-Based Matrix." Polymers 16, no. 20 (2024): 2909. http://dx.doi.org/10.3390/polym16202909.

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This study is aimed at developing a fibre-reinforced polymer composite with a high bio-based content and to investigate its mechanical properties. A novel basalt fibre-reinforced polymer (BFRP) composite with bio-based matrix modified with different contents of star-like n-butyl methacrylate (n-BMA) block glycidyl methacrylate (GMA) copolymer has been developed. n-BMA blocks have flexible butyl units, while the epoxide group of GMA makes it miscible with the epoxy resin and is involved in the crosslinking network. The effect of the star-like polymer on the rheological behaviour of the epoxy wa

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33

Braun, Volker. "Discrete Wilson Lines in F-Theory." Advances in High Energy Physics 2011 (2011): 1–18. http://dx.doi.org/10.1155/2011/404691.

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F-theory models are constructed where the7-brane has a nontrivial fundamental group. The base manifolds used are a toric Fano variety and a smooth toric threefold coming from a reflexive polyhedron. The discriminant locus of the elliptically fibered Calabi-Yau fourfold can be chosen such that one irreducible component is not simply connected (namely, an Enriques surface) and supports a non-Abelian gauge theory.

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34

Maltin, C. A., M. I. Delday, S. M. Hay, G. M. Innes та P. E. V. Williams. "Effects of bovine pituitary growth hormone alone or in combination with the β-agonist clenbuterol on muscle growth and composition in veal calves". British Journal of Nutrition 63, № 3 (1990): 535–45. http://dx.doi.org/10.1079/bjn19900140.

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Twenty-three British Friesian bull calves at approximately 7 d of age were allocated to one of four treatments: controls untreated (five calves), a group (Clen) given 1 mg clenbuterol/kg diet (five calves), a group (GH) given a daily subcutaneous injection of 3.5 mg bovine pituitary growth hormone (GH) (five calves) and a group (Clen + GH) given a combination of clenbuterol as in the Clen group with GH as in the GH group (seven calves). All calves were given milk-substitute at levels adjusted weekly according to metabolic live weight. The animals were slaughtered over the weight range 150–170

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35

Johnston, I. A., N. J. Cole, M. Abercromby, and V. L. A. Vierira. "Embryonic temperature modulates muscle growth characteristics in larval and juvenile herring." Journal of Experimental Biology 201, no. 5 (1998): 623–46. http://dx.doi.org/10.1242/jeb.201.5.623.

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The influence of embryonic and larval temperature regime on muscle growth was investigated in Atlantic herring (Clupea harengus L.). Eggs of spring-spawning Clyde herring were incubated at 5 degrees C, 8 degrees C or 12 degrees C until hatching and then reared until after metamorphosis at rising temperatures to simulate a seasonal warming. Metamorphosis to the juvenile stage was complete at 37 mm total length (TL), after an estimated 177 days as a larva at 5 degrees C, 117 days at 8 degrees C and 101 days at 12 degrees C. Growth rate and the development of median fins were retarded in relation

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36

Martin, W. H., A. R. Coggan, R. J. Spina, and J. E. Saffitz. "Effects of fiber type and training on beta-adrenoceptor density in human skeletal muscle." American Journal of Physiology-Endocrinology and Metabolism 257, no. 5 (1989): E736—E742. http://dx.doi.org/10.1152/ajpendo.1989.257.5.e736.

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The density and distribution of beta-adrenergic receptors in type I and II fibers of human gastrocnemius and quadriceps muscles were characterized in ten healthy sedentary subjects and in a subgroup of six subjects before and after 12 wk of endurance exercise training. Total tissue content of beta-receptors was measured in frozen sections of skeletal muscle biopsies incubated with 125I-labeled cyanopindolol in the presence and absence of 10(-5) M L-propranolol. The relative beta-receptor densities of type I and II fibers were delineated autoradiographically. Muscle fiber types were identified

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37

Prince, Thomas. "Smoothing Calabi–Yau toric hypersurfaces using the Gross–Siebert algorithm." Compositio Mathematica 157, no. 7 (2021): 1441–91. http://dx.doi.org/10.1112/s0010437x21007132.

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We explain how to form a novel dataset of Calabi–Yau threefolds via the Gross–Siebert algorithm. We expect these to degenerate to Calabi–Yau toric hypersurfaces with certain Gorenstein (not necessarily isolated) singularities. In particular, we explain how to ‘smooth the boundary’ of a class of four-dimensional reflexive polytopes to obtain polarised tropical manifolds. We compute topological invariants of a compactified torus fibration over each such tropical manifold, expected to be homeomorphic to the general fibre of the Gross–Siebert smoothing. We consider a family of examples related to

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38

Mäkinen, Harri, Pekka Saranpää, and Sune Linder. "Wood-density variation of Norway spruce in relation to nutrient optimization and fibre dimensions." Canadian Journal of Forest Research 32, no. 2 (2002): 185–94. http://dx.doi.org/10.1139/x01-186.

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The effect of fertilization on wood density, fibre length, fibre diameter, lumen diameter, proportion of cell wall area, and cell wall thickness of Norway spruce (Picea abies (L.) Karst.) were studied in a nutrient optimization experiment in northern Sweden. On the fertilized plots, all essential macronutrients and micronutrients were supplied in irrigation water every second day during the growing season. After 12 years' treatment, data were collected from 24 trees (40 years old) on the fertilized and control plots. Fertilization increased radial growth more than threefold, especially earlywo

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39

Lanteri, Antonio. "Vertically of (-1)-Lines in Scrolls Over Smooth Surfaces." Canadian Mathematical Bulletin 34, no. 2 (1991): 236–39. http://dx.doi.org/10.4153/cmb-1991-038-3.

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AbstractLet S be a smooth surface contained as an ample divisor in a smooth complex projective threefold X, which is a P1 -bundle, and assume that induces OP1 (1) on the fibres of X. The following fact is proven. The restriction to S of the bundle projection of X is exactly the reduction morphism of the pair provided that this one is not a conic bundle. The proof is very simple and does not involve any consideration on the nefness of the adjoint bundle Some applications of the proof are given.

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40

Armstrong, Elizabeth F., Martin A. Eastwood, Christine A. Edwards, W. Gordon Brydon, and Cecilia C. A. MacIntyre. "The effect of weaning diet on the subsequent colonic metabolism of dietary fibre in the adult rat." British Journal of Nutrition 68, no. 3 (1992): 741–51. http://dx.doi.org/10.1079/bjn19920130.

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The effect of the weaning diet on the subsequent colonic metabolism of bran and pectin in the adult rat has been investigated. Feeding a fibre-reduced diet on its own or supplemented with bran (WB) and pectin (P) from weaning (fibre-reduced (weaning)) was compared with introducing the same diet to age-matched rats reared on a standard laboratory diet from weaning (fibre-reduced (6 weeks)). The effects of the diets on colonic metabolism were measured by wet and dry caecal contents and stool weights, caecal sac weight, and caecal and faecal short-chain fatty acids (SCFA). Final body-weights were

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41

Ribeiro, M. C. S., L. F. P. Juvandes, J. D. Rodrigues, António J. M. Ferreira, and António Torres Marques. "Behaviour of Cement and Polymer Mortar Materials to Rapid Freeze-Thaw Cycling." Materials Science Forum 636-637 (January 2010): 1329–35. http://dx.doi.org/10.4028/www.scientific.net/msf.636-637.1329.

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The aim of this investigation work is threefold: 1) To analyse and quantify freeze-thaw resistance of glass fibre reinforced epoxy polymer mortars, comparatively to both normal cement mortars and plain epoxy polymer mortars; 2) To determine glass fibre reinforcement effect on freeze-thaw behaviour; and 3) To evaluate the reliability of ASTM C666M-03 test methodology for the assessment of freeze-thaw resistance of polymer concrete materials. For this purpose several test specimens, normal cement mortars, plain and glass-fibre reinforced epoxy polymer mortars were submitted to freeze-thaw cyclin

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42

Yu, Xiong-jie, J. David Dickman, Gregory C. DeAngelis, and Dora E. Angelaki. "Neuronal thresholds and choice-related activity of otolith afferent fibers during heading perception." Proceedings of the National Academy of Sciences 112, no. 20 (2015): 6467–72. http://dx.doi.org/10.1073/pnas.1507402112.

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How activity of sensory neurons leads to perceptual decisions remains a challenge to understand. Correlations between choices and single neuron firing rates have been found early in vestibular processing, in the brainstem and cerebellum. To investigate the origins of choice-related activity, we have recorded from otolith afferent fibers while animals performed a fine heading discrimination task. We find that afferent fibers have similar discrimination thresholds as central cells, and the most sensitive fibers have thresholds that are only twofold or threefold greater than perceptual thresholds

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43

BOCHKAREV, E. S., V. V. KLIMOV, YU D. GRIGORIEVA, et al. "INFLUENCE OF OLIGOMERS ON THE QUALITY OF IMPREGNATION OF CONTINUOUS CARBON FIBER." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 12(295) (December 2024): 125–36. https://doi.org/10.35211/1990-5297-2024-12-295-125-136.

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The results of the experimental data on the influence of oligourethane methacrylates 2002T and MIFM, as well as epoxy dianic and oil polymer resins, on the values of the contact angle of wetting with a polymer solution on the surface of carbon fibers and the adhesion strength during peel testing of finished prepregs have been obtained. The results indicate that with the presence of oil polymer resin in the impregnating solution, the adhesion strength during peel testing increases threefold (1.68 MPa), while the contact angle of wetting decreases by 28°. The preliminary data obtained allow for

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44

He, Yang-Hui, John McKay, and James Read. "Modular subgroups, dessins d’enfants and elliptic K3 surfaces." LMS Journal of Computation and Mathematics 16 (2013): 271–318. http://dx.doi.org/10.1112/s1461157013000119.

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AbstractWe consider the 33 conjugacy classes of genus zero, torsion-free modular subgroups, computing ramification data and Grothendieck’s dessins d’enfants. In the particular case of the index 36 subgroups, the corresponding Calabi–Yau threefolds are identified, in analogy with the index 24 cases being associated to K3 surfaces. In a parallel vein, we study the 112 semi-stable elliptic fibrations over ${ \mathbb{P} }^{1} $ as extremal K3 surfaces with six singular fibres. In each case, a representative of the corresponding class of subgroups is identified by specifying a generating set for th

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45

ANDREAS, B., D. HERNÁNDEZ RUIPÉREZ, and D. SÁNCHEZ GÓMEZ. "STABLE SHEAVES OVER K3 FIBRATIONS." International Journal of Mathematics 21, no. 01 (2010): 25–46. http://dx.doi.org/10.1142/s0129167x10005908.

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We construct stable sheaves over K3 fibrations using a relative Fourier-Mukai transform which describes the sheaves in terms of spectral data similar to the construction for elliptic fibrations. On K3 fibered Calabi–Yau threefolds we show that the Fourier-Mukai transform induces an embedding of the relative Jacobian of spectral line bundles on spectral covers into the moduli space of sheaves of given invariants. This makes the moduli space of spectral sheaves a generic torus fibration over the moduli space of curves of the given arithmetic genus on the Calabi–Yau manifold.

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Mori, Shigefumi, and Yuri Gennadievich Prokhorov. "Remark on the paper "General elephants for threefold extremal contractions with one-dimensional fibres: exceptional case", Sbornik: Mathematics, 212:3 (2021), 351-373." Sbornik: Mathematics 216, no. 4 (2025): 578–80. https://doi.org/10.4213/sm10194e.

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Allen, D. L., S. R. Monke, R. J. Talmadge, R. R. Roy, and V. R. Edgerton. "Plasticity of myonuclear number in hypertrophied and atrophied mammalian skeletal muscle fibers." Journal of Applied Physiology 78, no. 5 (1995): 1969–76. http://dx.doi.org/10.1152/jappl.1995.78.5.1969.

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Although a mammalian skeletal muscle fiber may contain thousands of myonuclei, the importance of this number or the potential to modulate it in adult muscle has not been clearly demonstrated. Using immunohistochemistry and confocal microscopy, we examined the plasticity of myonuclear number and fiber size in isolated fast and slow fiber segments from adult cat hindlimb muscles in response to chronic alterations in neuromuscular activity and loading. Compared with slow fibers in the soleus of control cats, myonuclear number in presumably transformed fast fibers was 32% lower and fiber size was

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Špoljarić, Branimira, Maja Popović, Josip Crnjac, et al. "Gleaning a Human DNA Profile from Trace Swabs Collected from Animal Hairs." Acta Veterinaria 66, no. 2 (2016): 187–202. http://dx.doi.org/10.1515/acve-2016-0016.

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Abstract Animal hairs are an apt surface for retention of forensic trace epithelial samples. The aim of this study was threefold: to evaluate different methods of sample collection (moistened and dry swabs) and DNA extraction (Chelex® 100 method, Qiagen EZ1® DNA Investigator Kit), as well as to examine the morphological differences of hair fibres between two species (dog, sheep) and their ultimate impact on sample collection and processing. Our preliminary findings suggest that the use of EZ1® DNA Investigator Kit yields donor DNA profiles of higher quality. The results of different sample col

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Matthäus, Carla, Nadine Kofler, Thomas Kränkel, Daniel Weger, and Christoph Gehlen. "Interlayer Reinforcement Combined with Fiber Reinforcement for Extruded Lightweight Mortar Elements." Materials 13, no. 21 (2020): 4778. http://dx.doi.org/10.3390/ma13214778.

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Lightweight mortar extrusion enables the production of monolithic exterior wall components with improved thermal insulation by installing air chambers and reduced material demand compared to conventional construction techniques. However, without reinforcement, the systems are not capable of bearing high flexural forces and, thus, the application possibilities are limited. Furthermore, the layer bonding is a weak spot in the system. We investigate a reinforcement strategy combining fibers in the mortar matrix with vertically inserted elements to compensate the layer bonding. By implementing fib

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Gorumlu, Serdar, and Burak Aksak. "Sticking to rough surfaces using functionally graded bio-inspired microfibres." Royal Society Open Science 4, no. 6 (2017): 161105. http://dx.doi.org/10.1098/rsos.161105.

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Synthetic fibrillar adhesives inspired by nature, most commonly by the gecko lizard, have been shown to strongly and repeatedly attach to smooth surfaces. These adhesives, mostly of monolithic construction, perform on par with their natural analogues on smooth surfaces but exhibit far inferior adhesive performance on rough surfaces. In this paper, we report on the adhesive performance of functionally graded microfibrillar adhesives based on a microfibre with a divergent end and a thin soft distal layer on rough surfaces. Monolithic and functionally graded fibre arrays were fabricated from poly

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