1,721,018 research outputs found
A ratiometric wavelength measurement based on a silicon-on-insulator directional coupler integrated device
Full text linkA ratiometric wavelength measurement based on a Silicon-on-Insulator (SOI) integrated device is proposed and designed, which consists of directional couplers acting as two edge filters with opposite spectral responses. The optimal separation distance between two parallel silicon waveguides and the interaction length of the directional coupler are designed to meet the desired spectral response by using local supermodes. The wavelength discrimination ability of the designed ratiometric structure is demonstrated by a beam propagation method numerically and then is verified experimentally. The experimental results have shown a general agreement with the theoretical models. The ratiometric wavelength system demonstrates a resolution of better than 50 pm at a wavelength around 1550 nm with ease of assembly and calibration
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Passive photonic integrated ratiometric wavelength monitor with resolution better than 15 pm
Full text linkThis paper presents a compact and low-loss photonic integrated device consistingof a Y-branch and a pair of multimode interferometers (MMI) for a ratiometric wavelength monitoring around 1550 nm on silicon-on-insulator (SOI) technique. Two MMIs are designed in terms of width and length to achieve overlapping but opposite slope spectral responses used as two edge filters over a wavelength measurement range from 1500 nm to 1600 nm. The developed integrated photonic ratiometric structure demonstrates a suitable discrimination range for a high-speed passive wavelength measurement, with a high resolution better than 15 pm over a 100 nm wavelength range
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
Pengaruh Informasi Gerombol terhadap Hasil Prediksi Area Nircontoh pada Data Binomial (Studi Kasus Proporsi Pengangguran di Sulawesi Tenggara).
No full textData ketenagakerjaan merupakan salah satu indikator penting terkait
kemajuan pembangunan suatu negara. Kondisi ketenagakerjaan di wilayah
Indonesia hanya dapat diperbandingkan antar waktu melalui data Survei Angkatan
Kerja Nasional (Sakernas). Data yang dihasilkan dari Sakernas dan dipublikasikan
oleh BPS adalah jumlah yang bekerja dan menganggur. Kendala dalam
melakukan pendugaan angka pengangguran semesteran pada tingkat
kabupaten/kota adalah kurangnya jumlah contoh, untuk itu diperlukan suatu
metode pendugaan tidak langsung yang mampu meningkatkan efektifitas ukuran
contoh, sehingga pendugaan parameter dapat dilakukan. Salah satu pendugaan
tidak langsung yang sedang berkembang saat ini adalah pendugaan area kecil
(small area estimation/SAE). Model pendugaan area kecil merupakan alternatif
yang dapat digunakan untuk menduga parameter pada suatu area ketika ukuran
contoh pada area tersebut terlalu kecil untuk mendapatkan presisi yang memadai
dibandingkan ketika dilakukan pendugaan secara langsung.
Penelitian ini mengembangkan model linier campuran terampat (MLCT)
dengan menambahkan informasi gerombol dan mengkaji pengembangan dengan
beberapa skenario model. Tujuan dari penelitian ini adalah mengembangkan
model prediksi MLCT dasar pendekatan area kecil dengan menambahkan
informasi gerombol sebagai pengaruh tetap maupun pengaruh acak.
Hasil simulasi menunjukkan bahwa Model-2, model yang menambahkan
pengaruh tetap gerombol ke-k dan nilai tengah dari pendugaan pengaruh acak area
pada area nircontoh, merupakan model terbaik dengan nilai relative bias (RB) dan
relative root mean squares error (RRMSE) terkecil. Model ini lebih baik daripada
model MLCT dasar (Model-0) dan Model-1 (model yang hanya menambahkan
nilai tengah dari pendugaan pengaruh acak area pada area nircontoh).
Model-2 diterapkan untuk menduga proporsi pengangguran tingkat
kecamatan di Provinsi Sulawesi Tenggara. Pendugaan proporsi pengangguran
dengan Model-2 kalibrasi menghasilkan agregasi dugaan proporsi pengangguran
Provinsi Sulawesi Tenggara sebesar 0.0272. Hasil tersebut serupa dengan angka
publikasi BPS (0.0272). Dengan demikian, hasil dugaan proporsi pengangguran
tingkat kecamatan dengan Model-2 kalibrasi dapat dikatakan layak digunakan
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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