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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Korelasi pekali kekasaran kekar (JRC) dengan sudut geseran puncak satah ketakselanjaran batuan granit, semenanjung Malaysia
No full textKekasaran permukaan satah ketakselanjaran adalah parameter penting untuk penilaian kestabilan struktur pengorekan dalam jasad batuan kerana ia mempengaruhi tingkah-laku ricihan dan nilai sudut geseran puncak satah tersebut. Beberapa kaedah boleh digunakan untuk menentukan kekasaran permukaan ketakselanjaran. Kertas ini memperkenalkan satu pendekatan yang mudah dalam bentuk tiga (3) persamaan polinominal untuk mengkorelasikan sudut geseran puncak ketakselanjaran (fp) batuan granit segar, terluluhawa sedikit dan terluluhawa sederhana dengan pekali kekasaran kekar, (JRC). Persamaan polinominal ketakselanjaran batuan granit segar ialah fp1 = -0.071JRC2 + 3.56JRC + 35.6. Persamaan polinominal ketakselanjaran batuan granit terluluhawa sedikit dan terluluhawa sederhana masing-masing ialah fp2 = -0.087JRC2 + 4.32JRC + 34.1 dan fp3 = -0.133JRC2 + 5.08JRC + 29. Hasil kajian ini memberikan satu kaedah alternatif penganggaran nilai fp satah ketakselanjaran daripada penentuan nilai PKK pada permukaan ketakselanjaran batuan granit di lapangan
Pencirian geomekanik jasad batuan dengan menggunakan kaedah seismos: nisbah poisson
No full textParameter mekanik seperti nisbah Poisson merupakan parameter input kejuruteraan batuan terutamanya dalam perisian komputer model berangka. Kaedah seismos digunakan untuk menentukan nisbah Poisson jasad batuan segar (gred I), terluluhawa sedikit (gred II), terluluhawa sederhana (gred III) dan tinggi (gred IV). Nisbah Poisson setiap lapisan jasad batuan dikira berdasarkan nilai purata halaju gelombang mampatan (Vp) dan gelombang ricih (Vs) pada kedalaman tertentu. Halaju gelombang mampatan (Vp) diperoleh daripada survei seismos biasan dan halaju gelombang ricih (Vs) diperoleh daripada survei analisis spektral gelombang permukaan (SASW) atau analisis gelombang permukaan berbilang saluran (MASW). Sebanyak 66 ujian seismos telah dijalankan pada 9 cerun jasad batuan iaitu 6 ujian di atas 1 cerun jasad batuan granit di JKR kuari Bukit Penggorak, Kuantan, Pahang26 ujian di atas 4 cerun jasad batuan granit di Kuari Kajang Rock, Semenyih, Ulu Langat, Selangor12 ujian di atas 1 cerun jasad batuan granit di Lebuhraya Silk Kajang (km 14.6) Selangor14 ujian di atas 2 cerun jasad batuan syis di Jalan Kuala Kubu Baru-Bukit Fraser (km 15), Selangor dan 8 ujian di atas 1 cerun jasad batuan kuarzit di Section U10, Bukit Cherakah, Shah Alam, Selangor. Daripada ujian seismos, nilai maksimum nisbah Poisson jasad batuan yang bergred I, II, III dan IV ialah 0.295, 0.335, 0.355 dan 0.364. Nilai minimum nisbah Poisson jasad batuan yang mempunyai gred I, II, III dan IV ialah 0.215, 0.299, 0.334 dan 0.337. Nilai purata nisbah Poisson untuk jasad batuan bergred I, II, III dan IV ialah 0.274, 0.320, 0.345 dan 0.345. Nilai nisbah Poisson jasad batuan menjadi semakin besar apabila gred terluluhawa menjadi semakin besar. Nilai purata nisbah Poisson jasad batuan gred II, III dan IV bertambah sebanyak 16.8%, 25.9% dan 25.9% jika dibandingkan dengan jasad batuan gred I. Keadaan ini berlaku kerana perubahan retakan pada jasad batuan gred I adalah lebih besar apabila mengalami proses terluluhawa. Perubahan retakan menjadi semakin kecil apabila mengalami proses terluluhawa seterusnya. Tiada perubahan retakan berlaku pada jasad batuan gred III apabila menjadi jasad batuan gred IV
Application of spectral analysis of surface waves (SASW) method: rock mass characterization
No full textA geotechnical study needs to be carried out to determine the engineering parameters of the rock mass at the project site in executing construction projects such as tunnels, dams, highways and buildings. Design and safety factor of the construction are highly dependent on soil and rock engineering parameters which are usually determined by in-situ test such as Standard Penetration Test (SPT) and seismic tests. The SPT test which normally involves drilling and laboratory works always incur high operating cost, while seismic tests on the other hand are fast, cheap, non-destructive and an easy to operate method for rock mass characterization. The spectral analysis of surface waves (SASW) method is an in situ and non-destructive measurement that is rapid and cost effective. The aims of this study were to determine Rock Quality Designation (RQD) value, excavation classification analysis as well as site characterization by using the SASW method. WinSASW 3.1.3 was used for inversion processing of the SASW data to produce shear wave velocity (Vs) versus depth profiles. The profiles were then analyzed and correlated with rock mass engineering geological parameters such as RQD and site characterization as well as excavation classification of rock mass. Twenty (20) SASW tests were conducted on the granitic rock mass and four (4) SASW tests were conducted on a cut hill slope of metasedimentary rocks. RQD values were computed based on shear wave velocities and ultrasonic velocities of intact (fresh) rock. The differences between RQD obtained from SASW method and those from discontinuity survey were found to be less than 10%. Excavation classification for granitic rock mass at JKR Quarry was empirically determined using both SASW and ultrasonic velocities as well as RQD value of the rock mass. Site characterization for metasedimentary rocks mass at Bukit Tampoi was determined based on shear wave velocities from SASW method
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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
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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