125,636 research outputs found
Nonlinear fibre design for broadband phase sensitive amplification
No full textWe present a soft glass fibre design for high nonlinearity and broadband, low dis-persion and simulate its performance as a phase sensitive amplifier for high bit rate signals at 1 T b/s. We use a degenerate, two pump four wave mixing scheme and show that with a fibre length of less than 1 m we are able to achieve 14 dB discrimination between the amplified and deamplified signal quadratures with 1 W pump power.H. Tilanka Munasinghe, Shahraam Afshar V., David J. Richardson, and Tanya M. Monrohttp://www.iqec-cleopr2011.com/http://www.opticsinfobase.org/abstract.cfm?uri=CLEOPR-2011-C70
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Self-formed dipolefibre cavities
No full textAfshar V., S.; Henderson, M.; Greentree, A. D.; Gibson, B.; Monro, T. M.http://www.aomevents.com/ACMMICON
Highly birefringent, low loss and low dispersion THz waveguides with sub-wavelength porous structure
No full textS. Atakaramians, S. Afshar V., B. M. Fischer, D. Abbott and T. M. Monr
Analytical and clinical evaluation of a new method for the automatic identification of Biphasic waveform on APTT analysis
No full textPorous fibre: A novel THz waveguide
No full textWe propose a novel class of fibre with a porous core transverse crosssection that can offer a combination of low transmission loss and high mode confinement in the THz regime.Shaghik Atakaramians, Shahraam Afshar V., Bernd M. Fischer, Derek Abbott and Tanya M. Monr
Porous fibers: Low loss, low dispersion waveguides for terahertz transmission
No full textWe demonstrate that porous fibers can offer both broadband low loss guidance and flattened group velocity, and thus that they are a promising new range of dielectric waveguide structures for the terahertz regime.S. Atakaramians, S. Afshar V., B. M. Fischer, D. Abbott and T. M. Monr
Pragmatic Case Studies as a Source of Unity in Applied Psychology
No full textTo unify or not to unify applied psychology: that is the question. In this article we review pendulum swings in the historical efforts to answer this question—from a comprehensive, positivist, “top-down,” deductive yes between the 1930s and the early 60s, to a postmodern no since then. A rationale and proposal for a limited, “bottom-up,” inductive yes in applied psychology is then presented, employing a case-based paradigm that integrates both positivist and postmodern themes and components. This paradigm is labeled “pragmatic psychology” and, its specific use of case studies, the “Pragmatic Case Study Method” (“PCS Method”). We call for the creation of peer-reviewed journal-databases of pragmatic case studies as a foundational source of unifying applied knowledge in our discipline. As one example, the potential of the PCS Method for unifying different angles of theoretical regard is illustrated in an area of applied psychology, psychotherapy, via the case of Mrs. B. The article then turns to the broader historical and epistemological arguments for the unifying nature of the PCS Method in both applied and basic psychology.Peer reviewe
Low loss, low dispersion T-ray transmission in Microwires
No full text©2007 Optical Society of AmericaWe present low loss, < 0.01 1/cm, and dispersion, < 10 ps/(km.nm), properties of microwires for terahertz transmission. These wires have diameters smaller than the operating wavelength, resulting in the propagation of enhanced evanescent fields. © 2007 Optical Society of America.S. Afshar, S. Atakaramians, B. M. Fischer, H. Ebendorff-Heidepriem, T. Monro, and D. Abbot
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