1,720,963 research outputs found
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
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
Analysis Of Sar Main Parameters For Sar Sensor Design on LSA
No full textLAPAN plans to conduct a flight test of LSA (LAPAN Surveillance Aircraft). LSA STEMME-S15 is capable of carrying sensor payloads up to 160 kg that are mounted on both sides of the wings with altitude between 400-2000 m. LSA can be designed to perform imaging by using optical sensors and SAR (Synthetic Aperture Radar). Compared to imaging using optical sensors, SAR sensor has advantages such as it can operate all day and night, able to penetrate clouds, and able to see objects from side looking, while optical sensors generally see the object perpendicular to the ground. Therefore the use of SAR imaging technology can complement optical imaging technology. To design SAR system imagers on LSA, it is necessary to simulate the primary parameters SAR i.e. altitude and look angle of sensor, speed of LSA, SAR frequency and signals power shot to object to calculate the resolution of azimuth and ground range values that can be obtained. This SAR parameters simulation used MATLAB which have been designed with two approaches; the first approach where the SAR sensor is ideal and in which all the fundamental parameters (such as polarization, frequency, etc.) are used to generate the desired sensitivity and resolution of azimuth and ground range, and the second approach is where SAR sensor is designed in a limited antenna size (constraint case), with the assumption that the dimensions of the antenna and the average available power are fixed. The data used in this simulation is a pseudo-data obtained from LSA technical spesification and SAR sensor. The simulation results with the first approach shows that if LSA is flying at an altitude of 1000 m, with speed of 36.11 m/s, and SAR frequency of 5.3 GHz, then to get resolution of azimuth, slant range and ground range of 1 m, 1.2 m and 3 m, it is necessary to design the length and width of SAR antenna at 2 m and 13.5 cm, with look angle of 23.5 degrees. While the result of second approach simulation is that if LSA is flying on the same altitude and speed, on the same look angle and SAR frequency, with a particular design of antenna length and width of 2 m and 13.5 cm, then azimuth, slant range and ground range resolution of 1 m, 1.87 and 4.79 m will be obtained. Form both simulations, it can be concluded that limited SAR system on LSA, especially on the technical aspects of mounting and space as in the simulation with the second approach, will produce slightly lower slant range and ground range resolution when compared with SAR system in the first simulation. This shows that space limitation on LSA will affect decrease the value of spatial ground range resolution. The simulation results are expected to be inputs on designing SAR imaging system on LSA.p.85-96 : ilus. ; 28 c
Modifikasi Muffler Untuk Menurunkan Tingkat Kebisingan, Emisi Gas Buang CO dan HC
No full textABSTRAK Soleh, Muchammad. 2017. Modifikasi Muffler Untuk Menurunkan Tingkat Kebisingan, Emisi Gas Buang CO dan HC. Skripsi, Jurusan Teknik Mesin, Fakultas Teknik, Universitas Negeri Malang. Pembimbing: (I) Prof. Dr. Mardji, M. Kes., (II) Drs. Ir. Eko Edi Purwanto, S.E., M.pd., M.M. Kata Kunci : Modifikasi Muffler, Kebisingan, CO, HC.Modifikasi muffler adalah suatu kegiatan yang dilakukan pada konstruksi muffler dengan tujuan agar menghasilkan suara yang berbeda akibat dari peredaman gas buang hasil pembakaran yang akan mempengaruhi performa kerja mesin pada kendaraan bermotor.Penelitian ini bertujuan : (1) Menemukan pengaruh modifikasi muffler untuk menurunkan tingkat kebisingan. (2) Menemukan pengaruh modifikasi muffler untuk menurunkan kadar CO. (3) Menemukan pengaruh modifikasi muffler untuk menurunkan kadar HC.Penelitian ini menggunakan jenis eksperimen dengan menggunakan tiga variabel. Dimana variabel bebasnya adalah variasi bahan muffler, yaitu: standart, muffler berbasis arang, muffler berbasis air dan muffler berbasis steel wool. Sedangkan variabel terikatnya adalah tingkat kebisingan, dan masing-masing kadar kandungan CO dan HC pada gas buang diperoleh dengan menggunakan sound level meter dan gas analyzer . Data yang diambil mulai dari 1500 rpm hingga 4000 rpm dengan kenaikan 500 rpm, kemudian statistik parametrik dengan menggunakan metode one way anova digunakan untuk menganalisis data yang dibantu oleh SPSS 18 untuk windows.Berdasarkan data variasi tingkat kebisingan muffler yang berbeda, perbedaan yang signifikan dari tingkat kebisingan/penyerapan antara muffler standard dan muffler berbasis air sehingga p = 0.002. Perbedaan yang signifikan antara muffler berbasis arang dan muffler berbasis air sehingga p = 0.005. Terakhir, perbedaan yang signifikan antara muffler berbasis steel wool dan muffler berbasis air sehingga p = 0.009, oleh karena itu, muffler berbasis air memiliki kemampuan menyerap suara terbaik di antara muffler berbasis lainnya. Di sisi lain, tidak ada perbedaan yang signifikan pada penyerapan kadar CO dan HC yang diperoleh antara semua jenis muffler, karena menurut perhitungan dengan menggunakan SPSS, nilai p =0,697 < 0,05 dan p = 0,603 < 0,05 dapat disimpulkan untuk masing-masing kadar emisi gas buang CO dan HC
Analisis Parameter-Parameter Utama Untuk Desain Sensor SAR Pada LSA (Lapan Surveillance Aircraft
No full textHal. 49-5
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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