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IDENTIFIKASI PARAMETER MODAL DENGAN MENGGUNAKAN METODE SIMULASI NUMERIK - FREQUENCY DOMAIN DECOMPOSITION
Get PDFKomunitas peneliti dibidang rekayasa ketekniksipilan kini berinovasi dengan
melakukan penelitian berupa rekayasa berkebalikan (inverse engineering).
Munculnya rekayasa berkebalikan ini mengindikasikan bahwa para desainer (ahli
struktur) sudah saatnya tidak hanya berorientasi pada desain struktur semata, namun
harus mampu mendeteksi dan atau memonitor kesehatan struktur berdasarkan
parameter modal dari struktur. Dalam mengidentifikasi parameter modal tersebut
maka ditinjau dua model struktur yaitu struktur frame dan struktur kantilever.
Tujuan dari penelitian ini adalah mengidentifikasi parameter modal (frekuensi
alami struktur (ωn), periode getar (T) dan mode getar (ɸ)) berdasarkan metode
simulasi numerik dengan bantuan software - Matlab yang dikembangkan dalam
Arfiadi (1996) dan membandingkannya dengan metode frequency domain
decomposition (FDD) yang dikembangkan oleh Brincker (2000) dengan mengikuti
program Schanke (2015). Kelebihan metode FDD adalah bahwa metode ini bersifat
sistem output (output only) sehingga hanya memerlukan respon dari struktur baik
respon percepatan maupun respon perpindahan.
Berdasarkan hasil analisis dari kedua model struktur tersebut, baik dengan
menggunakan metode simulasi numerik dengan bantuan software - Matlab yang
dikembangkan dalam Arfiadi (1996) maupun dengan metode FDD yang
dikembangkan oleh Brincker (2000) dengan mengikuti program Schanke (2015)
menunjukkan hasil identifikasi cukup memuaskan. Adapun perbandingan hasil
identifikasi parameter modal antara metode simulasi numerik dengan metode FDD
yaitu :frekuensi alami struktur (ωn) untuk struktur frame sebesar 5,21 % untuk
mode satu ; 3,38 % untuk mode dua dan 3,01 % untuk mode tiga. Sedangkan pada
struktur kantilever sebesar 2,98 %. Periode getar (T) untuk struktur frame sebesar
5,17 % untuk mode satu ; 3,35 % untuk mode dua dan 2,95 % untuk mode tiga
sedangkan pada struktur kantilever sebesar 2,93 %.
Hasil perbandingan parameter modal tersebut mengindikasikan bahwa metode
FDD yang dikembangkan oleh Brincker (2000) dengan mengikuti program
Schanke (2015) berhasil dengan sangat baik untuk diaplikasikan pada struktur
frame dan struktur kantilever dalam mengidentifikasi parameter modal
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
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
Strategi Pengelolaan Terpadu Fasilitas Pejalan Kaki
Get PDFAbstrakKetiadaan dan/atau buruknya kualitas layanan fasilitas pejalan kaki tidak saja berdampak pada gangguan kelancaran aktivitas pejalan kaki tetapi juga dapat memicu terjadinya kecelakaan lalu lintas. Di lokasi studi sesungguhnya sudah terdapat sejumlah fasilitas yaitu trotoar, zebra cross, Zona Selamat Sekolah (ZoSS), halte dan jembatan penyeberangan; namun hasil observasi menunjukkan bahwa selain terjadi kemacetan akibat pola parkir kendaraan dan penyeberangan pejalan kaki yang tidak teratur, juga terindikasi adanya risiko kecelakaan akibat perilaku speeding pengendara sepeda motor. Studi ini tidak saja bertujuan untuk mengidentifikasi aspek ketersediaan (jumlah), dimensi dan tata letak, namun juga kebutuhan pengembangannya secara berkelanjutan. Penilaian kinerja dilakukan berdasarkan pertimbangan akan aspek ketersediaan dan aspek fungsionalnya yaitu dengan membandingkannya terhadap kriteria penyediaan maupun kriteria desain tiap fasilitas dimaksud. Hasil penelitian menunjukkan bahwa diperlukan tidak saja perbaikan fisik dan tambahan fasilitas namun juga dimensi dan tata letaknya.AbstractThe absence and/or lack of pedestrian facilities' performance is not only affect the mobility of pedestrian activities but also could trigger traffic accident. Although there are some pedestrian facilities built at the study location such as kerb, zebra cross, school safety zone, bus stop and crossing bridge, but the result of visual observation shown that there was a traffic congestion, caused by uncontrolled parking and pedestrian crossing pattern, and high level of accident risk due to speeding behaviour of motorcyclists. The aim of this study is not only to identify the presence of number, dimension and the suitable site of the existing pedestrian facilities but also and the needs of new facilities sustainably. The assessment of those facilities' performance was conducted based on the consideration about on the presence and functional aspects, i.e by comparing them to their available and design criteria. The result of the study showed that it is needed not only physical reconstruction and new additional facility but also improvement of dimension and/or lay out of those facilities.
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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