2,128 research outputs found
Bassozetus levistomatus Machida 1989
No full textBassozetus levistomatus Machida, 1989. 80.5 cm (31.7 in) SL. Circumglobal; western Pacific Ocean north to Izu-Ogasawara Trench (Nakabo in Nakabo 2002); central California (34°40’N, 125°05’W). Depth: 3,965 –5,200 m (13,005 –17,056 ft). All in Nielsen and Merrett (2000).Published as part of Love, Milton S., Bizzarro, Joseph J., Cornthwaite, Maria, Frable, Benjamin W. & Maslenikov, Katherine P., 2021, Checklist of marine and estuarine fishes from the Alaska-Yukon Border, Beaufort Sea, to Cabo San Lucas, Mexico, pp. 1-285 in Zootaxa 5053 (1) on page 81, DOI: 10.11646/zootaxa.5053.1.1, http://zenodo.org/record/557800
Multitestis elongatus Machida 1982
No full textMultitestis elongatus Machida, 1982 (Figs 5–6) New material. Host: Platax pinnatus (Linnaeus), Ephippidae, dusky batfish (Ephippidae). Site: Intestine. Locality: Lizard Island (14°40’S, 145°28’E, April, 2008). Prevalence: 1 of 5. Voucher specimen: QM G 231061. Discussion. Measurements of the single specimen have been included in Table 1. According to Bray et al. (1994), Machida in a personal communication said he considered this species a synonym of Multitestis pyriformis. Having found one specimen that appears to us to be very distinct from M. pyriformis and which generally agrees with Machida’s (1982) description, we believe that Machida was correct originally to describe this form as a new species from Platax orbicularis off Palau. It differs from M. pyriformis in bodyshape (elongate oval vs pyriform; width 29% of body length (new specimen) to 39% (Machida’s data) vs 37– 73% - Machida (1982) fixed his worms under cover glass pressure which may (?) have exaggerated the width somewhat, so the higher figures relating to both species may be result of this fixation technique), sucker width ratio (1:0.97 (new), 0.97–1.00 (original) vs 1:1.01–1.40) and pre-testicular distance (49% (new), 52% (Machida’s data) of body-length vs 30–42%). In addition, the bulk of the cirrus-sac in M. elongatus is oriented antero-posteriorly versus mostly transverse in M. pyriformis.Published as part of Bray, Rodney A., Cribb, Thomas H. & Justine, Jean-Lou, 2010, Multitestis Manter 1931 (Digenea: Lepocreadiidae) in ephippid and chaetodontid fishes (Perciformes) in the south-western Pacific Ocean and the Indian Ocean off Western Australia, pp. 36-46 in Zootaxa 2427 on pages 40-42, DOI: 10.5281/zenodo.29425
S. Kaizuka, Y. Ota, T. Koaze, K. Koike, M. Nogami, H. Machida et N. Yonekura, Géomorphologie illustrée (en japonais)
No full textPaskoff Roland. S. Kaizuka, Y. Ota, T. Koaze, K. Koike, M. Nogami, H. Machida et N. Yonekura, Géomorphologie illustrée (en japonais). In: Annales de Géographie, t. 96, n°536, 1987. p. 490
Determination Of Local Temporal Electron Density And Temperature Using Visible Spectroscopy Of Carbon Emissions
No full text[No abstract available]212981301Nascimento, F., Machida, M., (2012) Journal of Physics: Conference Series, 370, p. 012053. , OnlineDaltrini, A.M., Machida, M., (2002) Brazilian J. of Physics, 32, p. 26Atomic Data and Analysis Structure, , http://www.adas.ac.uk/Behringer, K., (1989) Plasma Physics and Controled Fusion, 31, p. 2059Menmuir, S., (2006) Physica Scripta, 74, p. 439NIST Atomic Spectra Database, , http://physics.nist.gov/asd/Monteiro, M.J.R., Machida, M., (2005) Japanese Journal of Applied Physics, 44, p. 38
Hastatobythites Machida 1997
No full textHastatobythites Machida, 1997 Hastatobythites Machida 1997: 385, type species by original designation Hastatobythites arafurensis Machida, 1997. Hastatobythites: Nielsen et al. 1999: 105. Diagnosis. A monotypic genus of the subfamily Bythitinae (Cohen & Nielsen 1978: 42) with the following characters: two spines placed in midline of head, one anteriorly directed on frontal above eye and another upward directed, weak and thin on ethmoid, three bony ridges on dorsum behind frontal spine; maximum width of head 5.6 –6.0% SL and of body 3.5–3.9 % SL. Also the following combination of characters is diagnostic: Elongate body with joined vertical fins; head naked and anterior part of body with scattered scales in midline and posterior half of body almost fully scaled; skin thin, translucent; eye diameter less than snout-length; opercular spine covered by skin; posterior part of maxilla greatly expanded vertically; dentigerous bones with granular teeth; palatines with 2–3 tooth rows; pectoral peduncle slightly longer than broad, not adnate; gill opening extending well above opercular spine; anterior gill arch with three long rakers; precaudal vertebrae 15 and total vertebrae 57–58; fin rays in dorsal 99–100, caudal 12, anal 64–65 and pectoral 16–17; otolith length to height = 2.5, sulcus undivided, placed in central part of inner face, otolith length to sulcus length = 2.7. Similarity. Hastatobythites is most similar to Saccogaster in having more or less prolonged pectoral radials, naked head, teeth on palatines and thin skin. Hastatobythites differs from Saccogaster by having one median spine on frontal plate (vs. a pair or none), very narrow head (5.6 –6.0 % SL vs. 10.5 –15.0 % SL) and body (3.5–3.9 % SL vs. 4.2–9.5 % SL) and three median bony ridges behind frontal spine (absent or one in Saccogaster). Hastatobythites differs from Parasaccogaster n. gen. in the very narrow head, three median bony ridges behind frontal spine, prolonged free pectoral radials (vs. adnate) and the thin, tight head skin (vs. thick and loose). Pectoral Dorsal Anal Species 75 77 79 81 83 85 87 89 91 93 95 97 99 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 12 13 14 15 16 17 18 19 20 21 22 23 – 74 – 76 78 – 80 – 82 – 84 – – 86 – 88 – 90 92 – – 94 96 – 98 – 100 – 36 – 38 – 40 42 – – 44 46– 48 – 50 – – 52 54– 56 – 58 – 60 – 62 – 64 – H. arafurensis + + + + + P. melanomycter + + + P. normae + + + + + + + + P. rhamphidognatha + + + S. brayi + + + S. hawaii + + + S. horrida + + + S. maculata + + + + + + + S. nikoliviae + + + + + + + + S. parva + + + S. staigeri + + + + + + + S. tuberculata + + + + + + + + + + + + + +Published as part of Nielsen, Jørgen G., Schwarzhans, Werner & Cohen, Daniel M., 2012, Revision of Hastatobythites and Saccogaster (Teleostei, Bythitidae) with three new species and a new genus, pp. 1-36 in Zootaxa 3579 on pages 3-4, DOI: 10.5281/zenodo.20867
Reflection and transmission in a neutron-spin test of the quantum Zeno effect
No full textThe dynamics of a quantum system undergoing frequent "measurements," leading to the so-called quantum Zeno effect, is examined on the basis of a neutron-spin experiment recently proposed for its demonstration. Unlike in all previous studies, the spatial degrees of freedom of the neutron are duly taken into account. Their inclusion in the analysis is important for two reasons: first, neutron-reflection effects are shown to be very important; second, the evolution may rum out to be totally different from the ideal case. Our results can be interpreted in terms of a rigorous theorem due to Misra and Sudarshan: indeed we clarify that, in contrast with a widespread belief, a quantum Zeno effect does not halt the evolution of a quantum system; it rather modifies it, by forcing the system to remain in a certain subspace, defined by the very measurement performed. [S1050-2947(99)00811-2]
Extension of Fill's perfect rejection sampling algorithm to general chains (Extended Abstract)
No full text. We provide an extension of the perfect sampling algorithm of Fill (1998) to general chains, and describe how use of bounding processes can ease computational burden. Along the way, we unearth a simple connection between the Coupling From The Past (CFTP) algorithm originated by Propp and Wilson (1996) and our extension of Fill's algorithm. 1 Introduction Markov chain Monte Carlo (MCMC) methods have become extremely popular for Bayesian inference problems (consult, e.g., Gelfand and Smith [16], Smith 1991 Mathematics Subject Classification. Primary 60J10, 68U20; Secondary 60G40, 62D05, 62E25. The first and second authors have been supported in part by NSF grants DMS--9626756 and DMS--9803780, and by the Acheson J. Duncan Fund for the Advancement of Research in Statistics. The third and fourth authors have been supported in part by NSERC. c fl0000 American Mathematical Society 2 James Allen Fill, Motoya Machida, Duncan J. Murdoch, and Jeffrey S. Rosenthal and Roberts [36], Tierne..
Wasp sting of the cornea
No full textTetsuya Muto, Shigeki Machida Department of Ophthalmology, Dokkyo Medical University Saitama Medical Center, Koshigaya, Japan Purpose: Many treatments, such as conservative management or penetrating keratoplasty, exist for corneal wasp sting. Here, we report a case of paper wasp sting of the cornea treated by anterior chamber wash immediately following admission, which soon resolved the inflammation.Case: A healthy 9-year-old boy who had been stung by a paper wasp on his left eye 2 days prior to presentation at Dokkyo Medical University Saitama Medical Center was found to have corneal opacity accompanied by ciliary injection. The boy had difficulty opening his left eye due to pain. His left corneal endothelial cell density was 2,789 cells/mm2, which was relatively lesser than that in the right eye. We diagnosed a paper wasp sting of the cornea based on both the patient’s clinical findings and sting history. The anterior chamber was promptly irrigated using a balanced salt solution; the inflammation resolved in a few hours, and the patient could open his left eye easily the following day. One day after the operation, the visual acuity improved to 1.2, and only slight corneal opacity remained at the original wasp sting site.Conclusion: The positive outcome of the current case suggested that anterior chamber irrigation leads to rapid resolution of the inflammation. Keywords: anterior chamber, endothelial cell density, paper was
Corneal Perforation Associated with the Oral Anticancer Drug S-1：A Case Report
No full textPurpose：S-1 is an oral anticancer drug containing tegafur, a prodrug of 5-fluorouracil（5-FU）. We present a patient who experienced corneal perforation that appeared to be caused by S-1 administration．
Case：A 67-year-old woman was presented to our hospital because of corneal perforation in her left eye. She had been administrated S-1 for 17 months from gastroenterological surgeon at another hospital for treating pancreatic cancer. The best-corrected visual acuity was 0.4 in the right eye and 0.1 in the left eye at the initial visit. Convoluted subepithelial opacity was present in the cornea of the right eye, and corneal perforation was observed in the left eye. Anterior chamber formation was very poor, and iris incarceration was present in the left eye. Although anterior chamber formation was attempted with the use of soft contact lens wear, the condition remained unchanged. We requested to discontinue S-1 administration to gastroenterological surgery at another hospital. The patient was presented to the department of ophthalmology at another hospital because her eye condition and pancreatic cancer could be treated at the same institution.
Conclusion：Patients treated with S-1 should be carefully followed up for ocular complications because corneal perforation may occur.journal articl
Hastatobythites arafurensis Machida 1997
No full textHastatobythites arafurensis Machida, 1997 Figs. 1, 2, 25, Tables 1–3 Hastatobythites arafurensis Machida 1997: 386, figs. 1–2 (type locality: Arafura Sea, 9 ° 18 ’S, 133 ° 25 ’E). Material examined (1 specimen and photo and radiograph of holotype NTM S. 12904 -011): Paratype: NTM S. 12904 -018, female, 57 mm SL, NNE of Money Shoal, Arafura Sea. 9 ° 18 ’S, 133 ° 25 ’E, otter trawl, 146 m, 7 Nov. 1990. Remarks on material: Two specimens known from the same locality. A specimen (AMS I. 29749 -002) caught off New South Wales was originally identified as H. arafurensis and cited by Nielsen et al. (1999: 105). It is now correctly referred to Saccogaster tuberculata (Chan, 1966). Diagnosis. See diagnosis for Hastatobythites Description. The major meristic and morphometric characters are shown in Table 3. Head and body elongate and strongly compressed with tapering caudal part and blunt snout. Posterior part of body fully scaled, anterior part with a few scales in midline and head naked. No visible lateral line. Dorsal fin origin above proximal part of pectoral fin and anal fin origin well behind midpoint of fish. Pectoral fin ending less than halfway to anus with peduncle a little longer than broad. Anterior gill arch (Fig. 2 D) with 4–5 knobs on upper branch, a developed raker in angle and lower branch with two developed rakers with a knob between followed by 11 knobs; all rakers and knobs with small, densely placed spines. Long rakers about twice the length of gill filaments. Two small pseudobranchial filaments. Head pores on paratype difficult to observe. Axial skeleton (based on radiographs): Number of precaudal vertebrae 15. Anterior neural spine one fifth the length of second spine. Neural spines 4–5 to 6–7 gradually decreasing in length. Pointed tips on neural spines 1–2 to 4–5, blunt tips on spines 6 to 9 – 11 and remaining vertebrae with neural and haemal spines pointed. Vertebrae 3–4 to 6 with depressed tips and vertebrae 3–7 with enlarged basal parts. Parapophyses developed on vertebrae 6–15. Pleural and epipleural ribs show up so poorly on radiographs that counts are questionable. Dentition (based on paratype): Vomer and palatines with granular dentition in irregular rows and no fangs. Dentaries with 15–20 fangs in inner row and many small, pointed teeth in irregular outer rows. Premaxillaries with many small, pointed teeth in irregular rows and a few fangs near symphysis. Head morphology (Fig. 2 A–C): Head profile with minor concavity above eyes. Two spines in midline of head; a larger, free, forward-directed frontal spine placed above eyes and a smaller, ethmoidal spine partly covered by skin in front of eyes. Three median bony ridges on dorsum behind frontal spine (length 6.5 % SL). Anterior nostril placed close to upper lip and larger posterior nostril placed close to eye. Head pores: 1 supraorbital pore at tip of snout, 2 anterior infraorbital pores below and in front of eye, 1 anterior mandibular pore at tip of jaw. Head skin thin, tight. No neuromasts visible. No head pigmentation visible. Upper jaw ends well behind eye with posterior margin vertically expanded. Opercular spine flat but pointed not reaching hind margin of opercle. No spine at lower angle of preoperculum. Otolith (Fig. 2 E–F): Otolith elongate, thin; otolith length to height = 2.5, otolith height to thickness = 2.1. Dorsal and ventral rims regularly and shallow curved, dorsal rim with slight predorsal lobe. Anterior and posterior tips regularly rounded resulting in an oval appearance of the otolith. Inner face flat with centrally positioned, undivided small, oval, shallow sulcus; otolith length to colliculum length = 2.7. Outer face flat. Coloration. Paratype uniformly lightbrown, dorsal part of head darker and eyes bluish with light lens. Biology and distribution (Fig. 25). A viviparous species occurring on the lower continental shelf. Holotype a male with simple intromittant organ. Paratype a female with 4 embryos (4–5 mm long) with red-brown eyes, up to 20 scattered, red-brown spots on body and a short, brown stripe above abdomen (Fig. 1 C). Known from two specimens caught in the same trawl haul in the Arafura Sea from a depth of 146 m.Published as part of Nielsen, Jørgen G., Schwarzhans, Werner & Cohen, Daniel M., 2012, Revision of Hastatobythites and Saccogaster (Teleostei, Bythitidae) with three new species and a new genus, pp. 1-36 in Zootaxa 3579 on pages 4-7, DOI: 10.5281/zenodo.20867
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