1,720,954 research outputs found
Optimasi Penggunaan Sediment Trap Pada Alur Pelayaran Barat Surabaya Menggunakan Pemodelan Transpor Sedimen (Studi Kasus: Alur Pelayaran Barat Surabaya, Jawa Timur)
Get PDFPelabuhan Tanjung Perak merupakan salah satu pelabuhan terbesar di Indonesia. Merupakan pelabuhan yang cukup strategis baik itu menuju, atau dari wilayah timur Indonesia bagi perkembangan ekonomi dan transportasi laut. Karena hal tersebut, diperlukan penanganan dan monitoring bagi alur pelayaran agar lalu lintas kapal yang menuju dan dari Pelabuhan Tanjung Perak tidak terganggu dan tetap stabil. Lokasi penelitian ini berada pada wilayah Alur Pelayaran Barat Surabaya, Jawa Timur dengan 3 kondisi berbeda yaitu Pre-Survey, Post-Survey kondisi 1 yang memiliki sediment trap dan Post-Survey kondisi 2 yang tidak memiliki sediment trap. Penelitian ini menggunakan pemodelan 3D untuk melihat aktifitas hidrodinamika yang terjadi dan mempengaruhi perairan tersebut. Hasil dari pemodelan ini adalah pola arus, yang akan mempengaruhi pola sebaran sedimen pada area Alur Pelayaran Barat Surabaya. Model 3D dibentuk berdasarkan input parameter berupa pasang surut, debit sungai, dan angin yang ada di daerah penelitian. Pasang surut yang dimodelkan pada Pre-Survey memiliki nilai RMSE dan MAE sebesar 0,0307 meter dan 0,0244 meter. Post-Survey kondisi 1 memiliki nilai sebesar 0,0336 meter dan 0,0276 meter. Post-Survey kondisi 2 memiliki nilai sebesar 0,0563 meter dan 0,0289 meter. Serta arus pada Pre-Survey sebesar 0,3 m/s, pada Post-Survey kondisi 1 sebesar 0,2 m/s, dan pada Post-Survey kondisi 2 sebesar 0,4 m/s. Pola sebaran sedimen yang terbentuk dapat dilihat dari adanya perbedaan antara Post-Survey kondisi 1 dan kondisi 2 dimulai dari awal pemodelan hingga akhir pemodelan. Pada area alur pelayaran memiliki nilai yang dominan hampir sama dimulai dari -0,005 meter hingga 0,0175 meter. Nilai penambahan maksimal yang dimiliki oleh kondisi 1 senilai 0,072 meter sedangkan pada kondisi 2 senilai 0,062 meter pada area sediment trap. Walaupun kondisi 1 memiliki nilai maksimal yang lebih besar dari kondisi 2, hal tersebut hanya terjadi di beberapa titik saja, dan dikarenakan pada kondisi 1 memiliki sediment trap sehingga kenaikan dasar laut lebih terpusat ke beberapa titik dan tidak tersebar seperti yang terjadi pada kondisi 2.
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Tanjung Perak Port is one of the largest ports in Indonesia. It is a strategic port that either leads to, or from eastern Indonesia for economic development and sea transportation. Because of this, it is necessary to handle and monitor the shipping channel so that ship traffic to and from Tanjung Perak Port is not disturbed and remains stable. The location of this study is in the West Shipping Channel of Surabaya, East Java, with 3 different conditions namely Pre-Survey, Post-Survey condition 1 which has sediment traps and Post-Survey condition 2 that does not have sediment traps. This research uses 3D modeling to see the hydrodynamic activities that occur and affect these waters. The results of this modeling are current patterns, which will affect the pattern of sediment distribution in the Surabaya West Shipping Channel. The 3D model is formed based on input parameters in the form of tides, river discharge, and wind in the research area. The tide modeled on the Pre-Survey has a value of RMSE and MAE of 0.0307 meters and 0.0244 meters. Post-Survey condition 1 has a value of 0.0336 meters and 0.0276 meters. Post-Survey condition 2 has a value of 0.0563 meters and 0.0289 meters. The Pre-Survey current is 0.3 m / s, in Post-Survey condition 1 is 0.2 m / s, and Post-Survey condition 2 is 0.4 m / s. The pattern of distribution of sediments formed can be seen from the difference between Post-Survey conditions 1 and condition 2 starting from the beginning of modeling to the end of the modeling. In the shipping channel area, the dominant value is almost the same starting from -0.005 meters to 0.0175 meters. The maximum addition value owned by condition 1 is 0.072 meters while in condition 2 is 0.062 meters in the sediment trap area. Even though condition 1 has a maximum value greater than condition 2, it only occurs at a few points, and because in condition 1 it has a sediment trap so that the rise of the seabed is more concentrated to several points and not spread like what happened in condition 2
OPTIMASI PENGGUNAAN SEDIMENT TRAP PADA ALUR PELAYARAN BARAT SURABAYA MENGGUNAKAN PEMODELAN TRANSPOR SEDIMEN (STUDI KASUS: ALUR PELAYARAN BARAT SURABAYA, JAWA TIMUR)
No full textTanjung Perak Port is one of the largest ports in Indonesia that is quite strategic for economic development and sea transportation. The handling of shipping lanes is needed so that ship traffic remains stable. The research location in Alur Pelayaran Barat Surabaya with 3 different conditions namely Pre-Survey, Post-Survey condition 1 has a sediment trap and Post-Survey condition 2 has no sediment trap. Research uses 3D modeling to see hydrodynamic activity. The results of modeling are current patterns, which will influence the pattern of sediment distribution in the study area. The model is formed based on the parameters of tides, river discharge, and wind in the study area. Tidal Pre-Survey has a value of RMSE and MAE of 0.0307 meters and 0.0244 meters with a current of 0.3 m/s. Post-Survey condition 1 has a value of 0.0336 meters and 0.0276 meters with a current of 0.2 m/s. Post-Survey condition 2 has a value of 0.0563 meters and 0.0289 meters with a current of 0.4 m/s. The pattern of sediment distribution between Post-Survey conditions 1 and condition 2 has the same dominant value starting from -0.005 meters to 0.0175 meters. Maximum value of condition 1 is 0.072 meters while condition 2 is 0.062 meters in sediment trap area. Even though condition 1 has a maximum value greater than condition 2, it occurs at just a few points
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
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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