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All-optical switching and passive mode-locking based on non-linear polarization rotation in a semiconductor quantum well amplifier
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Development of titanium-based scaffolds for spinal prosthesis
No full textThe author was selected to join Assistant Professor Cleo Choong research group together with a collaboration project with Singapore Institute of Manufacturing Technology, Singapore for his Final Year Project with the project title as “Development of Titanium-based Scaffolds for Spinal Prosthesis”. Throughout this project, the author was under the guidance of Assistant Professor Cleo Choong as School of Materials Science & Engineering supervisor, Nanyang Technological University as well as Dr. He Zeming and Dr. Saeed Maleksaeedi as direct institute supervisors.
During this 1-year of research work, the author had been exposed to various types of learning experiences as well as hands-on opportunities for example seeing how the research milestones were planned and taking charged of carrying it out, using different types of characterisation testing machines such as Instron materials characterisation machine, Stylus Profilometer (Taylor-Hobson Form Talysurf Series 2) etc., understanding various process flows required in a research in order to link up all the research data and results via program used for data analysis.
Lastly the experience gained had enabled the author to further enhance his technical knowledge, develop a better safety culture as well as make learning a more enjoyable and fun journey. Besides, the author experienced culture differences as he worked together with exchange students from University of Sydney, Australia, improving his communication skills in the process.Bachelor of Engineering (Materials Engineering
Sertularella pacifica Choong, 2015, sp. nov.
No full text<i>Sertularella pacifica</i> sp. nov. <p>(Figure 6)</p> <p> <i>Sertularella fusiformis</i> — Torrey, 1902: 61, pl. 6, fig. 53–54.— Fraser, 1937: 153, pl. 34, fig. 181 [not <i>Sertularella fusiformis</i> (Hincks, 1861)]</p> <p> <b>Material</b>. <b>Holotype:</b> CANADA: British Columbia. Vancouver Island, Juan de Fuca Strait, Race Rocks, 48˚18’00”N, 123˚32’00”W, 0 5. iv.1986, 6–10 meters, two short hydrocauli, with gonothecae, coll. A. Brinckmann- Voss, ROMIZ B670. <b>Paratype:</b> CANADA: British Columbia. Queen Charlotte Land District. Masset Harbor, 14. ix.1935, without gonothecae, ROMIZ B4065. <b>Other material:</b> CANADA: British Columbia. Queen Charlotte Land District. Masset Harbor, 54˚03’00”N, 132˚13’00”W, 14. ix.1935, colony arising from stolon at the base of <i>Abietinaria pulchra</i> (Nutting, 1904) colony, without gonothecae, ROMIZ B4066. CANADA: British Columbia. Queen Charlotte Land District. Masset Harbor, 14. ix.1935, two short hydrocauli, without gonothecae, ROMIZ B4067. CANADA: British Columbia. Queen Charlotte Land District. Masset Harbor, 14. ix.1935, colony arising from stolon at the base of <i>Sertularia</i> sp.colony, without gonothecae, ROMIZ B4068. CANADA: British Columbia. Queen Charlotte Land District. Masset Harbor, 54˚03’00”N, 132˚13’00”W, 14. ix.1935, hydrocauli, without gonothecae, ROMIZ B4069.</p> <p> <b>Reported distribution</b>. California: San Francisco, as <i>Sertularella fusiformis</i> (Hincks, 1861) (Torrey, 1902). Oregon: Three locations off Heceta Head, 0–113 meters (Fraser, 1937).</p> <p> <b>Description.</b> Colonies erect, hydrorhiza stolonal, occasionally anastomosing. Hydrocaulus geniculate, unbranched. Perisarc thickened throughout, up to 60 mm thick. Hydrocaulus monosiphonic, unfascicled, divided into internodes. Internodes 1003–1530 mm long, with one to three (usually two) complete annulations basally; proximal-most annulation often spirally twisted (Fig. 3 A,B). Internode has tendency to spiral relative to main axis. Single hydrotheca distal to internode. Hydrothecae alternate, often not on same plane (Fig. 3 A). Hydrotheca tubular, walls asymmetrical; abcauline and adcauline wall slightly swollen basally, swelling on abcauline wall more proximal. Perisarc of hydrothecae thickened, up to 60 mm thick. Distal half of hydrotheca narrowed towards aperture, greater narrowing on abcauline side. Adcauline hydrothecal wall adnate for approximately 1/4–1/2 of length. Hydrothecal margin dentate with four equally-developed cusps; one adcauline, one abcauline, and two laterals. Opercular flaps triangular, four present; when closed forms roof extending slightly beyond opercular margin. Intrathecal cusps present, three in number, occasionally missing; two small intrathecal cusps proximal to and flanking adcauline marginal cusp, one long and narrow intrathecal cusp on abcauline side (Fig 3 A).</p> <p>Gonothecae (♂) few, attached to internode or directly below base of hydrotheca; large, up to three-times longer than hydrothecae, spindle-shaped, widest medially, longer than wide, flexed or bent mid-axis. Gonothecal body strongly annulated throughout; 10–12 complete, well-developed annulations. Neck short or barely discernible, four low rounded cusps around gonothecal aperture. Occasionally, one of the four cusps may be more developed than other three.</p> <p> <b>Differential diagnosis</b>. The records from the west coast of North America (Torrey 1902; Fraser 1937) seem to be morphologically distinct from descriptions of <i>S. fusiformis</i> elsewhere as shown by the absence of four intrathecal cusps and the presence of two annulations at the base of the internodes. These descriptions correspond to the specimens examined by the author in this study. Given the variability of the species included in the <i>S. fusiformis</i> / <i>S.ellisii</i> complex, this species was most likely misidentified as <i>S. fusiformis</i>. Measurements of the internodes, hydrothecae, and gonothecae (Table 4) show that these specimens are much larger than <i>S. fusiformis</i>. The intrathecal cusps are never as well-developed as in <i>S. fusiformis.</i> Moreover, the hydrothecae of <i>Sertularella pacifica</i> <b>sp. nov.</b> lack the considerably swollen basal portion and strongly tapered upper portion characteristic of the fusiform hydrothecal shape, and the gonothecae are distinct from those belonging to <i>S. fusiformis</i> in being spindle-shaped and bent around their mid-axis.</p> <p> <b>Remarks</b>. This material agrees with the hydroids attributed to <i>Sertularella fusiformis</i> (Hincks, 1861) from the west coast of North America by Torrey (1902), and subsequently included in reports by Fraser (1911, 1937). <i>Sertularella fusiformis</i> is well distributed in temperate and subtropical parts of the Atlantic as well as in the Mediterranean, but records of occurrences elsewhere are few and dispersed (Ramil <i>et al</i>. 1992). The latter are from the Indian Ocean coast of South Africa (Millard 1975) and from the Pacific coast of North America: Californian Pacific coast (Fraser 1911); off Heceta Head, Oregon (Fraser 1937). I consider the reports of <i>Sertularella fusiformis</i> from the Pacific coast of North America to be erroneous. Its biogeographic distribution, and the distinct morphological characteristics of <i>Sertularella pacifica</i> set this species apart from its congeners. Even within the Atlantic, it is probable that the nominal species <i>Sertularella fusiformis</i> is part of a species complex. <i>Sertularella fusiformis</i>, along with <i>S. mediterranea</i>, <i>S. ellisii</i>, <i>S. ornata</i>, and <i>S. polyzonias</i> are morphologically similar and so have been variously kept separate or synonymised with other taxa (Cornelius 1979; Ramil <i>et al.</i> 1992; Medel & Vervoort 1998). Millard (1958) considered <i>S. fusiformis</i> to be a variable species, but accepted the diagnostic value of the presence of 4 intrathecal cusps that alternate with the marginal cusps in this species, a view shared by Corrales <i>et al.</i> (1980). Others, such as Picard (1956) considered <i>S. fusiformis</i> to be an extreme, Atlantic form of <i>S. ellisii</i>. 16S genetic data has provided evidence that nominal species of <i>Sertularella fusiformis</i> from Madeira and the Azores in the North Atlantic fall into distinct clades likely corresponding to different species (Moura <i>et al.</i> 2011).</p> <p> <b>Etymology</b>. The species name refers to the Pacific Ocean and emphasizes its distinctiveness from its congeners elsewhere.</p>Published as part of <i>Choong, Henry H. C., 2015, Hydroids of the genus Sertularella (Cnidaria: Hydrozoa: Sertulariidae) from the Pacific coast of Canada in the collection of the Royal Ontario Museum, with descriptions of four new species, pp. 387-408 in Zootaxa 3925 (3)</i> on pages 399-400, DOI: 10.11646/zootaxa.3925.3.4, <a href="http://zenodo.org/record/236318">http://zenodo.org/record/236318</a>
Correction to: International Alliance of Urolithiasis (IAU) consensus on miniaturized percutaneous nephrolithotomy (Military Medical Research, (2024), 11, 1, (70), 10.1186/s40779-024-00562-3)
No full textAfter publication of the article, it was brought to our attention that the author name Otas Durutovic was duplicated in the author list and the second one should be replaced by the author Chu Ann Chai, and the affiliations of Ji-Wen Cheng and Chu Ann Chai are incorrect, the correct author list with correct affiliations is shown below: Guo-Hua Zeng, Wen Zhong, Giorgio Mazzon, Wei Zhu, Sven Lahme, Sanjay Khadgi, Janak Desai, Madhu Agrawal, David Schulsinger, Mantu Gupta, Emanuele Montanari, Juan Manuel Lopez Martinez, Shabir Almousawi, Vincent Emanuel F. Malonzo, Seshadri Sriprasad, Otas Durutovic, Vimoshan Arumuham, Stefania Ferretti, Wissam Kamal, Ke-Wei Xu, Fan Cheng, Xiao-Feng Gao, Ji-Wen Cheng, Bhaskar Somani, Mordechai Duvdevani, Kah Ann Git, Christian Seitz, Norberto Bernardo, Tarek Ahmed Amin Ibrahim, Albert Aquino, Takahiro Yasui, Cristian Fiori, Thomas Knoll, Athanasios Papatsoris, Nariman Gadzhiev, Ulanbek Zhanbyrbekuly, Oriol Angerri, Hugo Lopez Ramos, Iliya Saltirov, Mohamad Moussa, Guido Giusti, Fabio Vicentini, Edgar Beltran Suarez, Margaret Pearle, Glenn M. Preminger, Qing-Hui Wu, Chu Ann Chai, Khurshid Ghani, Marcus Maroccolo, Marianne Brehmer, Palle J. Osther, Marek Zawadzki, Azimdjon Tursunkulov, Monolov Nurbek Kytaibekovich, Abdusamad Abdukakhorovich Abuvohidov, Cesar Antonio Recalde Lara, Zamari Noori, Stefano Paolo Zanetti, Sunil Shrestha, Jean de la Rosette, John Denstedt, Zhang-Qun Ye, Kemal Sarica & Simon Choong. The original publication has been updated. © The Author(s) 2024
Correction: International Alliance of Urolithiasis (IAU) consensus on miniaturized percutaneous nephrolithotomy
Get PDFAfter publication of the article, it was brought to our attention that the author name Otas Durutovic was duplicated in the author list and the second one should be replaced by the author Chu Ann Chai, and the affiliations of Ji-Wen Cheng and Chu Ann Chai are incorrect, the correct author list with correct affiliations is shown below: Guo-Hua Zeng, Wen Zhong, Giorgio Mazzon, Wei Zhu, Sven Lahme, Sanjay Khadgi, Janak Desai, Madhu Agrawal, David Schulsinger, Mantu Gupta, Emanuele Montanari, Juan Manuel Lopez Martinez, Shabir Almousawi, Vincent Emanuel F. Malonzo, Seshadri Sriprasad, Otas Durutovic, Vimoshan Arumuham, Stefania Ferretti, Wissam Kamal, Ke-Wei Xu, Fan Cheng, Xiao-Feng Gao, Ji-Wen Cheng, Bhaskar Somani, Mordechai Duvdevani, Kah Ann Git, Christian Seitz, Norberto Bernardo, Tarek Ahmed Amin Ibrahim, Albert Aquino, Takahiro Yasui, Cristian Fiori, Thomas Knoll, Athanasios Papatsoris, Nariman Gadzhiev, Ulanbek Zhanbyrbekuly, Oriol Angerri, Hugo Lopez Ramos, Iliya Saltirov, Mohamad Moussa, Guido Giusti, Fabio Vicentini, Edgar Beltran Suarez, Margaret Pearle, Glenn M. Preminger, Qing-Hui Wu, Chu Ann Chai, Khurshid Ghani, Marcus Maroccolo, Marianne Brehmer, Palle J. Osther, Marek Zawadzki, Azimdjon Tursunkulov, Monolov Nurbek Kytaibekovich, Abdusamad Abdukakhorovich Abuvohidov, Cesar Antonio Recalde Lara, Zamari Noori, Stefano Paolo Zanetti, Sunil Shrestha, Jean de la Rosette, John Denstedt, Zhang-Qun Ye, Kemal Sarica & Simon Choong. The original publication has been updated.</p
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