7,569 research outputs found
Hymenocephalus yamasakiorum Nakayama, Endo & Schwarzhans 2015
No full textHymenocephalus yamasakiorum Nakayama, Endo & Schwarzhans, 2015 [Japanese name: Oguro-sujidara] (Fig. 146; Appendix 3-8F) Hymenocephalus yamasakiorum Nakayama, Endo & Schwarzhans, 2015a:505, figs. 1–4 (original description; holotype: BSKU 113692, from Tosa Bay off Aki, in 320–400 m; new Japanese name: “Oguro-sujidara”); Motomura 2020:39 (listed; Japan). Diagnosis. A species of Hymenocephalus with 9 pelvic-fin rays; barbel very long, length 73% PRL, its tip extending beyond vertical through hind margin of orbit when depressed; snout high, not depressed, length 37% PRL; orbit diameter 43% PRL; interorbital space 31% PRL; first dorsal-fin rays II,10; pectoral-fin rays i16–i17; gill rakers on first arch (outer/inner) 14/20, on second arch 20/19; pyloric caeca 15; trunk blackish dorsally, but the dark area abruptly ending posterior to first dorsal-fin base; dorsal half of tail prominently darker posteriorly, but ventral half completely lacking black melanophores; caudal vertebrae barely visible externally when fresh; ostial and caudal colliculi of otolith not fused. Material examined. 1 specimen. Holotype of Hymenocephalus yamasakiorum: BSKU 113692 (1, 26.5 mm HL, 151+ mm TL), off Aki, Kochi Pref., Tosa Bay, Japan, 320–400 m, F/ V Kosei-maru, bottom trawl, coll. N. Nakayama et al., 8 Apr. 2014. Counts and measurements. Counts: first dorsal-fin rays II,10; pectoral-fin rays i16–i17; pelvic-fin rays 9; gill rakers on first arch (outer/inner) 14/20, on second arch 20/19; pyloric caeca 15. The following measurements are in % of HL, followed by those in % of PRL in parentheses: snout length 28 (37); orbit diameter 33 (43); postorbital length 45 (59); postrostral length 76; orbit–preopercle distance 40 (52); suborbital width 9 (12); upper-jaw length 51 (67); length of rictus 46 (60); length of premaxillary tooth band 42 (55); preoral length 12 (16); distance between tip and lateral angle of snout 16 (21); snout width 26 (35); internasal width 18 (24); interorbital width 24 (31); body width over pectoral-fin bases 46 (61); body depth at first dorsal-fin origin 63 (82); body depth at anal-fin origin 49 (64); prepelvic length 105 (138); preanal length 162 (212); isthmus–pelvic distance 49 (64); isthmus–anal distance 105 (138); pelvic–anal distance 60 (79); pelvicfin length 78 (102); pectoral-fin length 53 (70); predorsal length 102 (133); height of first dorsal fin 82 (107); length of first dorsal-fin base 35 (46); interdorsal length 77 (101); length of gill slit 30 (39); length of posterior nostril 6 (8); barbel length 55 (73); length of pyloric caecum 14 (19). Size. At least 15 cm TL. Distribution. So far known only from Tosa Bay off Aki at a depth of about 320–400 m (Appendix 3-8F). Very rare. Remarks, relationships, and comparisons. Hymenocephalus yamasakiorum was recently described from a single specimen collected from Tosa Bay, Japan (Fig. 146), and it belongs to the H. iwamotoi group as defined by Schwarzhans (2014) (Nakayama et al. 2015a). In Japanese waters, the species might be confused with H. longibarbis by sharing a long chin barbel (73% and 53–72% PRL in H. yamasakiorum and H. longibarbis respectively), but they are readily separable by a difference in physiognomy: in H. yamasakiorum, the tip of the snout is high and moderately protrudes beyond the upper jaw giving a slightly pointed appearance to the snout (Fig. 146A), whereas the snout of H. longibarbis is low and greatly depressed, barely extending beyond the upper jaw (Fig. 139A). Body pigmentation is also different between the two species; in H. yamasakiorum, the dorsal half of the tail is abruptly darker posteriorly, but is uniformly dusky in H. longibarbis. Regarding meristic and morphometric characters, H. yamasakiorum differs from H. longibarbis, in having more pelvic- (9 vs. 8) and pectoral-fin rays (i16– i17 vs. i12–i16), fewer pyloric caeca (15 vs. 18–25), a longer snout (37% PRL vs. 26–33%), a broader interorbital space (31% PRL vs. 18–27%), a shorter pelvic fin (102% PRL vs. 109–153%), and a narrower pelvic–anal distance (79% vs. 87–115%). See the original description given by Nakayama et al. (2015a) for further morphological details and comparisons with other congeners.Published as part of Nakayama, Naohide, 2020, Grenadiers (Teleostei: Gadiformes: Macrouridae) of Japan and adjacent waters, a taxonomic monograph, pp. 1-383 in Megataxa 3 (1) on pages 221-222, DOI: 10.11646/megataxa.3.1.1, http://zenodo.org/record/642277
CHARACTERIZATION OF NAKAYAMA -CLUSTER TILTED ALGEBRAS OF TYPE
No full textAbstract. For any natural natural number m, the m-cluster tilted algebras are generalization of cluster tilted algebras. These algebras are defined as the endomorphism of certain objects in m-cluster category called m-cluster tilting objects. Finding such objectin the m-cluster category has become a combinatorial problem. In this article we charac-terize Nakayama m-cluster tilted algebras of type An by geometric description given byBaur and Marsh.DOI : http://dx.doi.org/10.22342/jims.22.2.213.93-130</jats:p
Neural basis for priming of pop-out during visual search revealed with fMRI
No full textMalikovic and Nakayama first showed that visual search efficiency can be influenced by priming effects. Even "pop-out" targets (defined by unique color) are judged quicker if they appear at the same location and/or in the same color as on the preceding trial, in an unpredictable sequence. Here, we studied the potential neural correlates of such priming in human visual search using functional magnetic resonance imaging (fMRI). We found that repeating either the location or the color of a singleton target led to repetition suppression of blood oxygen level-dependent (BOLD) activity in brain regions traditionally linked with attentional control, including bilateral intraparietal sulci. This indicates that the attention system of the human brain can be "primed," in apparent analogy to repetition-suppression effects on activity in other neural systems. For repetition of target color but not location, we also found repetition suppression in inferior temporal areas that may be associated with color processing, whereas repetition of target location led to greater reduction of activation in contralateral inferior parietal and frontal areas, relative to color repetition. The frontal eye fields were also implicated, notably when both target properties (color and location) were repeated together, which also led to further BOLD decreases in anterior fusiform cortex not seen when either property was repeated alone. These findings reveal the neural correlates for priming of pop-out search, including commonalities, differences, and interactions between location and color repetition. fMRI repetition-suppression effects may arise in components of the attention network because these settle into a stable 1. attractor state" more readily when the same target property is repeated than when a different attentional state is required
Michi Weglyn was noted activist who wrote redress 'bible'
No full textAn obituary of Michi Weglyn written by Takeshi Nakayama and published in the Japanese American newspaper "Rafu Shimpo" on April 27, 1999.These materials are from box 73 and 74 of the Frank Chin Papers. The Frank Chin Papers contain personal and professional correspondence between Frank Chin and Michi Weglyn relating to particular projects on which either author was working as well as files related to the Day of Remembrance Tribute to Michi Weglyn
nZ-cluster tilting subcategories for Nakayama algebras
No full textnZ-cluster tilting subcategories are an ideal setting for higher dimensional Auslander–Reiten theory. We give a complete classification of nZ-cluster tilting subcategories of module categories of Nakayama algebras given by quivers with relations. In particular, we show that there are three kinds of Nakayama algebras that admit nZ-cluster tilting subcategories: finite global dimension, selfinjective and non-Iwanaga–Gorenstein. Only the selfinjective ones can admit more than one nZ-cluster tilting subcategory. It has been shown by the second author, that each such nZ-cluster tilting subcategory induces an nZ-cluster tilting subcategory of the corresponding singularity category. For each Nakayama algebra in our classification, we describe its singularity category, the canonical functor from its module category to its singularity category, and provide a complete comparison of nZ-cluster tilting subcategories in the module category and the singularity category. This relies heavily on results by Shen, who described the singularity categories of all Nakayama algebras
On bounds of homological dimensions in Nakayama algebras
No full textLet be a Nakayama algebra with simple modules and a simple module of even projective dimension. Choose minimal such that a simple -module with projective dimension exists. Then we show that the global dimension of is bounded by . This gives a combined generalisation of results of Gustafson [J. Algebra 97 (1985), pp. 14-16] and Madsen [Projective dimensions and Nakayama algebras, Amer. Math. Soc., Providence, RI, 2005]. In [Comm. Algebra 22 (1994), pp. 1271-1280], Brown proved that the global dimension of quasi-hereditary Nakayama algebras with simple modules is bounded by . Using our result on the bounds of global dimensions of Nakayama algebras, we give a short new proof of this result and generalise Brown's result from quasi-hereditary to standardly stratified Nakayama algebras, where the global dimension is replaced with the finitistic dimension
Can ChatGPT Be Considered an Author of a Medical Article?
No full textKazuki Ide, Philip Hawke, Takeo Nakayama, Can ChatGPT Be Considered an Author of a Medical Article?, Journal of Epidemiology, 2023, Volume 33, Issue 7, Pages 381-382, Released on J-STAGE July 05, 2023, Advance online publication April 08, 2023, Online ISSN 1349-9092, Print ISSN 0917-5040, https://doi.org/10.2188/jea.JE20230030, https://www.jstage.jst.go.jp/article/jea/33/7/33_JE20230030/_article/-char/e
Selfextensions of modules for Nakayama and Brauer tree algebras
No full textFor Nakayama algebras , we prove that in case for an
indecomposable -module , we have that the projective dimension of is
infinite. As an application we give a new proof of a classical result from
\cite{Gus} on bounds of the Loewy length for Nakayama algebras with finite
global dimension. For Brauer tree algebras with an indecomposable module
, we prove that implies for all
.Comment: This article is not intended for publication and the main results
will be soon generalised in a new projec
Nakayama automorphisms of Frobenius cellular algebras
No full textLet be a finite dimensional Frobenius cellular algebra with cell datum . Take a non-degenerate bilinear form on . In this paper, we study the relationship among , and certain Nakayama automorphism . In particular, we prove that the matrix associated with with respect to the cellular basis is uni-triangular under certain condition.
10.1017/S000497271200044
The consequences of subtracting the mean pattern in fMRI multivariate correlation analyses
No full textCopyright © 2013 Garrido, Vaziri-Pashkam, Nakayama and Wilmer. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.No abstract available.National Institutes of Healt
- …
