1,721,007 research outputs found
Multi-point high temperature optical fiber sensor
Full text linkANZCOP, 2019, Melbourne, AustraliaAbstract not availableErik P. Schartner, Linh V. Nguyen, Dale Otten, Zheng Yu, David G. Lancaster, and Heike Ebendorff-Heidepriem, and Stephen C. Warren-Smit
Picoliter real-time quantitative polymerase chain reaction (qPCR) in an all-fiber system
No full textFrom the session: Optical Monitoring and Sensing (S4G).
Abstract - © 2019 The Author(s).We demonstrate an all-fiber, all-optical, real-time quantitative polymerase chain reaction system with ultra-fast temperature response, real-time temperature feedback, picoliter scale reaction volume and high fluorescence sensitivity.Xuegang Li, Linh V. Nguyen, Kelly Hill, Heike Ebendorff-Heidepriem, Erik Schartner, Yong Zhao, Xue Zhou, Yanan Zhang, and Stephen C. Warren-Smit
Active beam shaping in a 1.5 micrometers pulsed single-frequency multimode fibre amplifier
No full textPaper STu4D.1 . From the session: Fiber Lasers and Amplifiers (STu4D).Abstract not availableOri Henderson Sapir, Shuen Wei, Caleb Holme, Darcy Smith, Stephen C. Warren Smith, Linh V. Nguyen, Heike Ebendorff-Heidepriem, and David J. Ottawa
High temperature sensing with single material silica optical fibers
Full text linkWe present recent developments in high temperature sensing using single material silica optical fibers. By using a single material fiber, in this case a suspended-core fiber, we avoid effects due to dopant diffusion at high temperature. This allows the measurement of temperatures up to the dilatometric softening temperature at approximately 1300°C. We demonstrate and compare high temperature sensing in two configurations. The first exploits a small section of single material fiber spliced onto a length of conventional single mode fiber, which operates through multimode interference. The second utilizes a type II fiber Bragg grating written via femtosecond laser ablation.Stephen C. Warren-Smith, Linh V. Nguyen, Heike Ebendorff-Heidepriem, and Tanya M. Monr
High-sensitivity Sagnac-interferometer biosensor based on exposed core microstructured optical fiber
Full text linkLink to a related website: https://unpaywall.org/10.1016/j.snb.2018.04.165, Open Access via UnpaywallA novel, high sensitivity Sagnac-interferometer biosensor based on exposed core microstructured optical fiber (ECF) has been designed and implemented in this paper. The exposed core fiber has noncircular symmetry and thus exhibits birefringence and can form a sensing element within a Sagnac loop interferometer. The exposed-core fiber design provides direct access to the evanescent field, allowing the measurement of bulk refractive index (RI) with a sensitivity of up to −3137 nm/RIU while maintaining the fiber’s robustness. The sensor can also detect the localized refractive index changes at the fiber core’s surface as the result of a biological binding event. We demonstrate the use of this sensor for label-free sensing of biological molecules by immobilizing biotin onto the fiber core as the probe to capture the target molecule streptavidin.Xuegang Li, Linh V. Nguyen, Yong Zhao, Heike Ebendorff-Heidepriem, Stephen C. Warren-Smit
Label-free quantitative polymerase chain reaction in an optical fibre microcavity
No full textpaper C11D_1We demonstrate quantitative polymerase chain reaction (qPCR) using an all-fibre all-optical device. Through direct optical measurement of the sample refractive index, we show the potential of the system to operate as a label-free qPCR system.Xuegang Li, Linh V. Nguyen, Kelly Hill, Heike Ebendorff-Heidepriem, Erik P. Schartner, Yong Zhao ... et al
Microstructured optical fiber high-temperature sensors
Full text linkFrom the session Feelin' the Heat, Seeing the Light (T3A)
Link to a related website: https://unpaywall.org/10.1364/AIO.2019.T3A.2, Open Access via UnpaywallAt the University of Adelaide and the University of South Australia, we are utilizing the unique optical and material properties of microstructured optical fibers for new and challenging sensing applications. I will present our recent progress in using pure-silica microstructured optical fibers with femtosecond laser ablation fiber Bragg gratings (FBGs) for high temperature sensing up to and beyond 1000°C. In this project we are working with our industry partner, local engineering company SJ Cheesman, to develop multipoint sensors for pyrometallurgical applications.Stephen C. Warren-Smith, Erik P. Schartner, Linh V. Nguyen, Dale E. Otten, Zheng Yu, David G. Lancaster, and Heike Ebendorff-Heideprie
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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