3,721 research outputs found
Design and analysis of high-speed random access memory with Coulomb blockade charge confinement
No full textA Quantile Based Test of Protection for Sale Model
No full textThis paper proposes a new test of the Protection for Sale (PFS) model by Grossman and Helpman (1994). Unlike existing methods in the literature, our approach does not require any data on political organizations. We formally show that the PFS model provides the following prediction: In the quantile regression of the protection measure on the inverse import penetration ratio divided by the import demand elasticity, its coefficient should be positive at the quantile close to one. We examine this prediction using the data from Gawande and Bandyopadhyay (2000). The results do not provide any evidence favoring the PFS model.Quantile Regression, Protection for Sale, Political Economy
Tosanoides flavofasciatus Katayama & Masuda 1980
No full textTosanoides flavofasciatus Katayama & Masuda, 1980 Holotype: ZUMT 54241, 84 mm SL, male. Type locality: off Izu–Oshima, Japan, 34°47' N, 139°24' E, depth 50 meters. Illustrations: Katayama & Masuda, 1980a:53, figs. 1–3; Kuiter, 2004:91, figs. A–D; Pyle et al., 2016:176, fig. 7. D: X, 17. A: III, 8. P: 13. C: 15. V: 26 (10 + 16). S: 3. GR: 34 or 35 (8 to 10 + 25 or 26). LL: 31 or 32. Distribution: western Pacific.Published as part of William D. Anderson, Jr., 2018, Annotated checklist of anthiadine fishes (Percoidei: Serranidae), pp. 1-62 in Zootaxa 4475 (1) on page 53, DOI: 10.11646/zootaxa.4475.1.1, http://zenodo.org/record/145328
On the Narumi-Katayama Index of Composite Graphs
No full textThe Narumi-Katayama index of a graph G, denoted by N K(G), is equal to the product of degrees
of vertices of G. In this paper we investigate its behavior under several binary operations on graphs. We
present explicit formulas for its values for composite graphs in terms of its values for operands and some
auxiliary invariants. We demonstrate applications of our results to several chemically relevant classes of
graphs and show how the Narumi-Katayama index can be used as a measure of graph irregularity. (doi:
10.5562/cca2329
Imported Katayama fever: clinical and biological features at presentation and during treatment
No full textOBJECTIVES: To investigate the characteristics of imported Katayama fever (acute schistosomiasis) as well as evolution and outcome under treatment. METHODS: Between April 2000 and September 2004, we included prospectively all patients with confirmed diagnosis of Katayama fever. Follow-up was maintained at least until 6 months after symptoms resolved. Praziquantel (PZQ) was given as soon as the diagnosis was probable, most of the time with steroids. RESULTS: Twenty-three patients were diagnosed with Katayama fever by Schistosoma egg detection and/or by seroconversion. Clinical features were non-specific, with mainly respiratory and/or gastrointestinal symptoms. Diagnosis was confirmed at presentation in 17/23 (74%) patients, of whom 15 by serology. Immediate clinical exacerbation occurred in five of nine patients not given steroids concomitantly with PZQ. After initial resolution, fever recurred in five (22%) patients. When compiling initial and recurrent episodes (n=28), respiratory symptoms tended to occur at an earlier stage after exposure, while abdominal complaints were more frequent later. All patients were completely cured, sometimes after repeated treatments. CONCLUSIONS: Clinical presentation of Katayama fever is non-specific and involves respiratory and abdominal symptoms. Recurrence of fever is not unusual despite anti-helminthic treatment. Optimal therapeutic strategy remains to be defined to prevent recurrence
Quasi-isometric embeddings from mapping class groups of nonorientable surfaces (Women in Mathematics)
No full textClassifying finitely generated groups by quasi-isometries is a key issue in geometric group theory: two groups are quasi-isometric if, roughly speaking, their word metrics are the same up to linear functions. It is known that the mapping group Mod(N) of a nonorientable surface N is a subgroup of the mapping group Mod(S) of its double covering orientable surface S. We show that the injective homomorphism is a quasi-isometric embedding. This is a joint work with Takuya Katayama
CHEMICAL STUDTES ON THE RIVER WATERS IN THE INFECTED LOCALITIES WITH KATAYAMA-DISEASE (II)
No full textIn the previous report, one of the authors, T. Sugihara, discussed the results of chemical analysis of waters in the infected localites with Katayama-disease in the whole neighbourllood of Kannabe-cho, Fukayasu-distriict, Hiroshima-Prefecture. In this report, the authors discussed the results obtained in Yamanashi prefecture, and in the area drained by Chikugo River, and found the following facts: 1) The amount of KMnO(4) consumed and the copper content were high as in the previous report. 2) The calcium content was 7.3~22.2 mg/ℓ in the river waters of this report, but it was 18.7~38.2 mg/ℓ in the waters in the places of the previous paper. And in the previous report the author pointed out that the calcium content was fairly higher in the waters in the infected localities with Katayama disease than in the non-infected localities. But as the
calcium content was relatively lower this time than in the previous investigation, more research is intended to reach definite conclusion
Aenictobia siamensis Maruyama 2014, sp. n.
No full textAenictobia siamensis Maruyama, sp. n. (Figs. 1 – 9) Type series. Holotype, ♂, " THAI: Nakhon Ratchasima, / Khao Yai National Park, / Heaw Suwat (750 m), / 30 IX 2007, Maruyama M., / Komatsu T. & Katayama Y. / MM-AE029 // HOLOTYPE / Aenictoxenides / mirabilis / det. Maruyama, 2014" (male 8th abdominal segment and aedeagus dissected and mounted in Euparal) (KUM). Paratypes, 1♀, 7 sex?, same data as holotype (KUM, DNP); 8 sex?, " THAI: Nakhon Ratchasima, / Khao Yai National Park, / Kong Kaew (700 m), / 1 X 2007, Maruyama M. / MM-AE032" (KUM, DNP); 2♂, 2♀, 25 sex?, " THAI: Nakhon Nayok, / Khao Yai National Park, / near Cafeteria (700 m), / 3 X 2007, Maruyama M., / Komatsu T. & Katayama Y. / MM-AE036" (KUM). Description. Body (Figs. 1–3) small. Light reddish brown, but head, elytra and posterior part of abdomen darker; sometimes elytra dark brown. Head (Figs. 1–3) with process between antennal cavities strongly projected; eyes large, more prominent than temples. Antennae (Figs. 1–3) slender, with all segments longer than wide; segment I as long as II and III combined; segment IV–X gradually becoming longer and wider toward apex; segment XI slightly longer than X. Pronotum (Figs. 1–3) almost circular, narrower than elytra, with postero-lateral corners indistinct, slightly depressed behind anterior margin. Elytra (Figs. 1–3) longer than pronotum, Abdomen with tergite VIII (Fig. 4) shallowly emarginate at apex, with 4 short macrosetae; sternite VIII (Fig. 5) with 5 macrosetae. Male: Median lobe of aedeagus (Figs. 6, 7) crista apicalis acutely prominent; apical lobe of paramere (Fig. 8) oblong oval, with 2 large setae near base. Female: Spermatheca (Fig. 9) with apical part strongly swollen. Measurements. BL, ca. 2.0 – 2.3; FBL, ca. 1.0 – 1.2; HW, 0.33 – 0.37; AL, 1.42 – 1.55; PL, 0.38 – 0.43; PW, 0.44 – 0.54; HTL, 0.36 – 0.41 (N=5). Differential diagnosis. This species is similar to A. longicornis and A. thoi in the slender antennae but distinguished from them by the body being clearly bicolored, the smaller body length, the more circular pronotum, and the eyes being more prominent. Etymology. Named after Siam, an old exonym of Thailand. Symbiotic host. Aenictus hodgsoni. Distribution. Central Thailand.Published as part of Maruyama, Munetoshi, Komatsu, Takashi, Katayama, Yuji, Song, Xiao-Bin & Sakchoowong, Watana, 2014, Myrmecophilous rove beetles (Coleoptera: Staphylinidae) associated with Aenictus hodgsoni (Hymenoptera: Formicidae) from Thailand, with description of two new genera and three new species, pp. 361-373 in Zootaxa 3796 (2) on pages 362-363, DOI: 10.11646/zootaxa.3796.2.8, http://zenodo.org/record/491524
Aenictoxenides mirabilis Maruyama 2014, sp. n.
No full textAenictoxenides mirabilis Maruyama, sp. n. (Figs. 33–52) Type series. Holotype, ♂, " THAI: Nakhon Ratchasima, / Khao Yai National Park, / Heaw Suwat (750 m), / 30 IX 2007, Maruyama M., / Komatsu T. & Katayama Y. / MM-AE029 // HOLOTYPE / Aenictoxenides / mirabilis / det. Maruyama, 2014" (male 8th abdominal segment and aedeagus dissected and mounted in Euparal) (KUM). Paratypes, 2♂, 2♀, 7 sex?, same data as holotype (KUM, DNP); 2 sex?, " THAI: Nakhon Nayok, / Khao Yai National Park, / near Cafeteria (700 m), / 3 X 2007, Maruyama M., / Komatsu T. & Katayama Y. / MM-AE036" (KUM, DNP). Description. Body (Figs. 33–35) small. Light reddish brown overall. Head (Figs. 33–36) sparsely covered with short, recumbent setae, with 9 or 10 macrosetae. Antenna (Figs. 37) short, with some erecting setae on each segment; segment III shortest, 1/2 as long as IV; segment V widest; segment VI longest, narrowed apicad; segment VII conical.. Pronotum (Figs. 33–35, 43) with anterior margin shallowly emarginate; posterior margin convex medially; disc glabrous, with 12 macrosetae around mesal area and 6 short macrosetae along lateral margin; hypomera sparsely covered with setae, with 7 macrosetae. Metasternum (Fig. 44) with 2 macrosetae antero-medially. Elytra (Figs. 33–35, 45) glabrous; disc with 6 macrosetae around mesal area and 4 short macrosetae along lateral margin; hypomera sparsely covered with setae, with 5 macrosetae along lateral margin. Abdomen (Figs. 33–35, 49, 50): tergites II–VIII with following numbers of macrosetae: 0–3–3–3–3–2–2; sternites III–VIII with those: 10–10–10–8–3–3 (III – VI with variation, ± 1). Male: Median lobe of aedeagus (Figs. 52) with crista apicalis truncate at apex in lateral view; sclerites of internal sac small; apical lobe of paramere (Fig. 53) covered with pores, with 4 setae. Female: Spermatheca (Fig. 54) with basal part coiled at middle. Measurements. BL, ca. 1.8‒2.0; FBL, ca. 0.9‒1.1; HW, 0.64‒0.70; AL, 0.25‒0.27; PL, 0.33‒0.36; PW, 0.80‒0.88 (N=3). Differential diagnosis. This species is similar to Aenictoxenus species but easily distinguished from them by the more elongate body, and the temples of head which strongly extend laterally. See also Diagnosis of the genus. Etymology. The Latin adjective mirabilis meaning "amazing", "strange", for the amazingly beautiful and strange habitus of this species. Symbiotic host. Aenictus hodgsoni. Distribution. Central Thailand.Published as part of Maruyama, Munetoshi, Komatsu, Takashi, Katayama, Yuji, Song, Xiao-Bin & Sakchoowong, Watana, 2014, Myrmecophilous rove beetles (Coleoptera: Staphylinidae) associated with Aenictus hodgsoni (Hymenoptera: Formicidae) from Thailand, with description of two new genera and three new species, pp. 361-373 in Zootaxa 3796 (2) on pages 372-373, DOI: 10.11646/zootaxa.3796.2.8, http://zenodo.org/record/491524
Parascombrops analis Katayama 1957
No full text<i>Parascombrops analis</i> (Katayama, 1957) <p>Figs. 6H, 7A, 9A, 11B, 13A, 14F–G, 16, 35, Tables 2–7</p> <p> <i>Neoscombrops analis</i> Katayama 1957: 153, fig. 1 (holotype: NSMT [ex Katayama Fish Coll. 2447]; type-location off Owase, Mie Prefecture, Japan).</p> <p> <i>Synagrops analis</i>: Mochizuki 1984: 125; Hatooka 2002: 686; Fricke <i>et al.</i> 2014: 57.</p> <p> <b>Material examined</b> (18 specimens). AMS I.20919-038, 2 specimens, 91–107.5 mm SL, off Queensland, Australia, 11°58’S, 144°07’E, 400–420 m; ASIZP 72163, 2 specimens, 62–82 mm SL, Dong-gang, southwestern Taiwan; BSKU 50683, 70 mm SL, BSKU 73676, 51 mm SL, BSKU 94342, 74.5 mm SL, BSKU 94343, 74.5 mm SL, BSKU 94426, 63.5 mm SL, BSKU 94525, 82.5 mm SL, BSKU 101383, 29 mm SL, all Mimase fish market, Kochi, Japan; MNHN 1998-1056, 3 specimens, 77–82 mm SL, off Vanuatu, 16°52’S, 168°10’E, 486–494 m; MNHN 2011-0160, 43 mm SL, off Vanuatu, 15°52’S, 167°27’E, 944–956 m; NSMT P59841, 2 specimens, 72.5 and 74 mm SL, Mimase fish market, Kochi, Japan; NSMT P65718, 76.5 mm SL, off Honshu, Japan, 36°N, 148°E, 148– 167 m.</p> <p> <b>Diagnosis.</b> Deep-bodied species with convex dorsal head profile. Anal fin III + 6 in specimens> 65 mm SL. Pectoral fin with 16–18 rays, pectoral length 21.5–27% SL. Gill rakers 15–18. Pseudobranchial filaments 16–23, increasing with size. First anal-fin pterygiophore long, slightly forward bent, with very broad tip and hollow. Ectopterygoid with single row of denticles. Orbit diameter 11.7–13.3% SL. Otolith compressed (OL:OH = 1.45–1.55).</p> <p> <b>Description.</b> Counts and measurements are summarized in Tables 2–7. Snout rounded; interorbital space strongly convex. Posterior edge of maxillary more or less concave with postero-dorsal and postero-ventral angles sharp and postero-ventral angle somewhat extended downward, but positioned on the same level with posterodorsal angle resulting in an almost vertical posterior rim of the maxillary. Preopercular lobe without longitudinal ridges, but denticles of hind margin serration extending onto preopercular lobe; inner edge of preopercle with 2–5 long denticles not extending along ventral branch. Three anal-fin spines, second and third spines almost equal in length, but third spine always less stiff than second; in specimens <65 mm SL the third spine sometimes not completely ossified, weak or transitional from soft ray to spine and then not counted as spine. First anal fin pterygiophore long, curved, broadened at tip, hollow, reaching last pair of pleural ribs. First haemal spine with a narrow posterior expansion. Pelvic-fin spine serrated along its outer edge; all other fin spines smooth. About 28 scales along lateral line.</p> <p>Dentition. Premaxillary with a pair of canines near symphysis, followed posteriorly by a wide band of tiny conical teeth. Dentary with a pair of canines and a band of minute conical teeth near symphysis, followed posteriorly by a row of several small conical teeth and three to four enlarged canine-like teeth on each side. Vomer with a triangular to V-shaped patch of small conical teeth, usually with one row of longer teeth at rear margin. Palatines with one row of sharp conical teeth anteriorly and two rows of granular teeth posteriorly; ectopterygoid with single row of denticles. Tongue toothless.</p> <p>Otolith morphology (n = 7). Otolith compressed, thin; OL:OH = 1.45–1.55; OL:OT about 5–6. Dorsal rim moderately high, broad, rounded pre- and postdorsal angles of nearly equal height, postdorsal angle shifted far backwards. Ventral deep, regularly curved, deepest anterior of the middle. Anterior tip with massive, somewhat pointed rostrum; weak antirostrum and excisura. Posterior rim broadly rounded, its tip located slightly below tip of cauda. Rims smooth or slightly undulating. Inner face slightly convex with shallow, slightly supramedian sulcus. Ostium shallow, about twice as wide as cauda, oval in shape, with distinct colliculum, tip of rostrum being positioned above mid-level. Cauda slightly deepened, narrow, almost straight with very slightly swung, rounded tip. CaL:OsL = 1.1–1.2. Dorsal depression shallow, large, well marked above crista superior. Ventral furrow moderately distinct, anteriorly very close to anterior rim of otolith, posteriorly slightly turned upward from ventral otolith rim and terminating close to tip of cauda. Outer face slightly concave, smooth with few weak radial furrows near ventral rim.</p> <p> <b>Size.</b> Attain about 110 mm SL.</p> <p> <b>Discussion.</b> This species can be distinguished from all other species of <i>Parascombrops</i> by the presence of three (vs two) anal-fin spines (specimens> 65 mm SL). The development of the third anal-fin spine is a secondary transformation of the first soft ray with growth, as demonstrated by the reduced number of soft rays in adults (6). It also has the deepest body (27.9–33.8% SL) of all species, and a distinctly convex dorsal head profile together with <i>P. madagascariensis</i> n. sp. and <i>P. yamanouei</i> n. sp. <i>Parascombrops analis</i> can be distinguished from both species by the vomerine tooth patch which is wider and more intensely covered by granular teeth, by a single row of denticles on the ectopterygoid (vs 2–4), and the first anal-fin pterygiophore being very broad, with a widened tipped and hollow (vs moderately broad, without widened tip and hollow).</p> <p> <b>Geographic and bathymetric distribution.</b> <i>Parascombrops analis</i> has a disjunctive distribution in the northwestern Pacific off southern Japan, Taiwan and the northern Philippines and in the southwestern Pacific from the Coral Sea to Vanuatu, but is absent from the tropical low latitudes. Specimens examined have been caught in a wide depth range between 148 and 956 m.</p>Published as part of <i>Schwarzhans, Werner W. & Prokofiev, Artem M., 2017, Reappraisal of Synagrops Günther, 1887 with rehabilitation and revision of Parascombrops Alcock, 1889 including description of seven new species and two new genera (Perciformes: Acropomatidae), pp. 1-74 in Zootaxa 4260 (1)</i> on pages 27-31, DOI: <a href="http://zenodo.org/record/571305">10.5281/zenodo.571305</a>
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