10,675 research outputs found
Analysis of Reentrant Hybrid Tee
No full textThe conventional hybrid tee, which is symmetrical and reciprocal, has been used exclusively in mixer and impedance bridges in microwave engineering. The interconnection of the E-arm and H-arm of the hybrid tee through a 90-degree twist and a phase-shifter by Ishii and Jenners has turned the magic tee into a reentrant hybrid tee with different properties. Ishii and Jenners\u27 paper on the different attenuation levels of port 1 and port 2 of the reentrant hybrid tee has aroused the public interest about the characteristics of the reentrant hybrid tee. It is intended in this study to investigate the characteristics of the reentrant hybrid tee experimentally and theoretically. In the experiment, the author has done the measurements about attenuation, VSWR and impedance against the variation of frequency or phase-shifter setting of the reentrant loop. In theory, the author has derived a general equation for the reentrant hybrid tee, in terms of the scattering parameters of a basic hybrid tee. Conclusions were made about the reentrant hybrid tee by combining the experimental results and theoretical equations
Odontofroggatia Ishii
No full textOdontofroggatia Ishii Odontofroggatia Ishii, 1934: 95. Type species: Odontofroggatia gajimaru Ishii, by original designation. Diagnosis. Both sexes: occipital carina absent; malar sulcus absent; three ocelli arranged in an obtuse-angled triangle (Figs 1 C, G, K); scrobes very shallow; notauli complete and reaching transscutal suture, anterior margin of scutellum pointed at posterior margin of mid lobe of mesoscutum (Figs 1 B, F, J, K), tarsi tetramerous. Female: antennal formula 11063 (Figs 1 E, M) or 11053 (Fig. 1 A), funicular segments subequal in length and width; scutellum with 2 pairs of long setae on dorsal surface, one pair mediolaterally and one pair apically (Figs 1 B, F, J); fore wing with marginal cilia and membrane ciliated except for the basal third, postmarginal vein extremely short (Fig. 3 b); hypopygium wide and short (Wiebes 1980, fig. 9). Male: antennal formula 11053, both funicular segments and club without plate sensilla but with many hairs (Figs 1 C, G, K, O); mouth opening very broad, mandibles long and falcate in most species; pronotum much longer than mesoscutum (Fig. 3 d); petiole often armed with lateral teeth (Figs 1 D, H) or a ventral hook (Fig. 1 P); gaster much shorter than thorax and dorsoventrally flattened (Fig. 2 C). Biology. Odontofroggatia gajimaru and our new species are currently known only from F. microcarpa, whereas the other three species have been reared from both F. microcarpa and F. prasinicarpa, though the latter fig host record is based on just a single collection of material from Papua, New Guinea (Bouček 1988).Published as part of Feng, Gui & Huang, Da-Wei, 2010, Description of a new species of Odontofroggatia (Chalcidoidea, Epichrysomallinae) associated with Ficus microcarpa (Moraceae) with a key to species of the genus, pp. 40-48 in Zootaxa 2335 on page 41, DOI: 10.5281/zenodo.19318
Outcome of ureteroscopy for stone disease in patients with horseshoe kidney: Review of world literature
No full textIntroduction and Objectives: The management of urolithiasis in patients with horseshoe kidney (HSK) is difficult. Stone formation occurred in 1:5 patients with HSK due to impaired urinary drainage and infections. Percutaneous nephrolithotomy and shock wave lithotripsy can be technically challenging due to altered anatomy.
Materials and Methods: We conducted a systematic review of the literature to look at the role of ureteroscopy for stone management in these patients. We searched MEDLINE, PubMed and the Cochrane Library from January 1990 to April 2013 for results of ureteroscopy and stone treatment in HSK patients. Inclusion criteria were all English language articles reporting on ureteroscopy in patients with HSK. Data were extracted on the outcomes and complications.
Results: A total of 3 studies was identified during this period. Forty-one patients with HSK underwent flexible ureteroscopy and stone treatment. The mean age was 42 with a male:female ratio nearly 3:1. The mean stone size was 16 mm (range: 3-35 mm). The mean operating time was 86 min with multiple stones seen in 15 patients. All 41 patients had a ureteral access sheath used and flexible ureteroscopy and holmium laser fragmentation done. Thirty-two (78%) patients were stone-free with a mean hospital stay of 1-day. Minor complications (Clavien I or II) were seen in 13 (32%) of which 6 had stent discomfort, 3 needed intravenous antibiotics for <24 h, 3 had hematuria of which 2 needed blood transfusion and one had pyelonephritis needing re-admission and antibiotics. There were no major complications found in the review.
Conclusions: Retrograde stone treatment using ureteroscopy and lasertripsy in HSK patients can be performed with good stone clearance rate, but with a slightly higher complication rate. This procedure should, therefore, be done in high volume stone center with an experienced stone surgeon/team
Psyllaephagus iwayaensis Ishii 1928
No full textPsyllaephagus iwayaensis Ishii, 1928 Psyllaephagus iwayaensis Ishii, 1928: 128. Type material examined. LECTOTYPE: ♀ (here designated), (No. 145), Mountain Iwaya near Nagasaki, from psyllid found on Cinnamomum sp., 3.vi.1925, T. Ishii lgt. PARALECTOTYPES: 5 ♀♀, same data as lectotype. Additional material examined. 3 ♀♀, Matsuyama, ex Trioza cinnamomi, 1.–5.v.1956, T. Tachikawa lgt. & det.; 1 ♀ (on slide), Matsuyama, ex T. cinnamomi, 1.v.1956, T. Tachikawa lgt. & det. (ELKU). Distribution. Japan: Kyushu, Shikoku (TACHIKAWA 1963a). Endemic. Comments. It is worth noting that the mesoscutum of the type specimens has a metallic blue-violet to golden lustre which contrasts with the green-bronze and golden lustre of the scutellum and gaster. In the TRJAPITZIN’ s (1989) key to species of Psyllaephagus, couplet 63 is erroneous in that the marginal and postmarginal veins are both shorter than the stigmal vein, the ocelli form an 80° angle and AOL is less than POL. The same author incorrectly states that the mesoscutum and scutellum are with light purple-green metallic reflection, the postmarginal and marginal veins are as long as stigmal vein, the ocelli form a 60° angle and AOL is as long as POL.Published as part of Japoshvili, George, Higashiura, Yoshimitsu & Kamitani, Satoshi, 2016, A review of Japanese Encyrtidae (Hymenoptera), with descriptions of new species, new records and comments on the types described by Japanese authors, pp. 345-401 in Acta Entomologica Musei Nationalis Pragae 56 (1) on page 390, DOI: 10.5281/zenodo.530683
Examining Cultural Drifts in Artworks through History and Development: Cultural Comparisons between Japanese and Western Landscape Paintings and Drawings.
No full textNand, K., Masuda, T., Senzaki, S., & Ishii, K. (2014). Examining cultural drifts in artworks through development and history: Cultural comparisons between Japanese and Western landscape paintings and drawings. Frontiers in Psychology: Cultural Psychology, 5, 1041. doi: 10.3389/fpsyg.2014.0104
Encyrtus sasakii Ishii 1928
No full textEncyrtus sasakii Ishii, 1928 Encyrtus sasakii Ishii, 1928: 99. Type material examined. LECTOTYPE: ♀ (here designated), Nagasaki, ex Kermes sp. on Celtis sinensis, 23.v.1924 or 1926, T. Ishii lgt. (NIAES). PARALECTOTYPES: 6 ♀♀, same data as lectotype (1 ♀ head on slide) (NIAES). Additional material examined. 10 ♀♀, Matsuyama, 28.v.1955, T. Tachikawa lgt. & det.; slides: 1 ♀, Tsukumi, Oita Pref. 16.v.1955, T. Tachikawa lgt. & det., only wings; 1 ♀, Matsuyama, 28.v.1955, T. Tachikawa lgt. & det. Labelled as paratypes of E. hokkaidonis: 2 ♀♀, Mt. Yuo, Hokkaido, swept, 17.vii.1955, K. Morimoto lgt., T. Tachikawa det.; 1 ♀, Mt. Yuo, Akan. Nat. Park, Hokkaido, swept, 17.vii.1955, Y. Murakami lgt., T. Tachikawa det. (ELKU). Distribution. Japan: Kyushu, Shikoku (TACHIKAWA 1963a). China (NOYES 2016).Published as part of Japoshvili, George, Higashiura, Yoshimitsu & Kamitani, Satoshi, 2016, A review of Japanese Encyrtidae (Hymenoptera), with descriptions of new species, new records and comments on the types described by Japanese authors, pp. 345-401 in Acta Entomologica Musei Nationalis Pragae 56 (1) on page 371, DOI: 10.5281/zenodo.530683
Voices to Truth America! Exploring Hapa-ish
No full textIn his narrative, author Jonathan Ishii delves into the experience of growing up as a hapa. This narrative reflects on some past building events and realizations, as well as his search for identity and drive for success. Ishii provides a glimpse into his life through various experiences and his discovery of identities in Los Angeles and abroad
Ureteroscopy for stone disease in the paediatric population: a systematic review
No full textThe aim of the present review was to look at the role of ureteroscopy (URS) for treatment of paediatric stone disease. We conducted a systematic review using studies identified by a literature search between January 1990 and May 2013. All English-language articles reporting on a minimum of 50 patients aged ≤ 18 years treated with URS for stone disease were included. Two reviewers independently extracted the data from each study. A total of 14 studies (1718 procedures) were reported in patients with a mean (range) age of 7.8 (0.25-18.0) years. The mean (range) stone burden was 9.8 (1-30) mm and the mean (range) stone-free rate (SFR) 87.5 (58-100)% with initial therapeutic URS. The majority of these stones were in the ureter (n = 1427, 83.4%). There were 180 (10.5%) Clavien I-III complications and 38 cases (2.2%) where there was a failure to complete the initial ureteroscopic procedure and an alternative procedure was performed. To assess the impact of age on failure rate and complications, studies were subcategorized into those that included children with either a mean age <6 years (four studies, 341 procedures) or a mean age >6 years. (10 studies, 1377 procedures). A higher failure rate (4.4 vs 1.7%) and a higher complication rate (24.0 vs 7.1%) were observed in children whose mean age was <6 years. URS for paediatric stone disease is a relatively safe procedure with a reasonably good SFR, but there seems to be a higher failure and complication rate in children aged <6 years.</p
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