1,720,957 research outputs found
STUDI IDENTIFIKASI DASAR LAUT DALAM PENDETEKSIAN PIPA BAWAH LAUT (STUDI KASUS PIPA PERTAMINA BALIKPAPAN)
No full textPada tanggal 31 Maret 2018 telah terjadi pencemaran laut yang diakibatkan oleh tumpahnya minyak bumi di perairan Balikpapan. Hasil survei ditemukan bahwa tumpahan minyak di perairan tersebut terjadi karena patahnya pipa bawah laut milik Pertamina. Dalam upaya identifikasi pipa tersebut, digunakan 3 peralatan survei bawah laut yakni Multibeam echosunder (MBES), Side Scan Sonar (SSS) dan Magnetometer. Peralatan survei yang digunakan, berbeda pada tahap akusisi maupun tahap analisis dalam memperoleh informasi yang akan disajikan, oleh karena itu, diperlukan metode serta analisis tertentu untuk mempercepat identifikasi suatu objek dibawah laut. Selain menyediakan informasi batimetri, MBES memiliki fitur informasi hambur balik (backscatter) yang dapat digunakan untuk memperoleh nilai intensitas akustik yang dapat digunakan untuk mengidentifikasi jenis sedimen (substrat dasar laut) dan objek dasar laut lain berdasarkan tingkatan nilai intensitas akustik. Dengan nilai intensitas akustik tersebut suatu objek bawah laut dapat segera diidentifikasi di lapangan. Hasil identifikasi dengan nilai intensitas akustik di area perairan Balikpapan diperoleh material pipa bawah laut memiliki intensitas akustik sebesar 24,1 dB dan sedimensi berupa Lanau sedang (Medium Silt) dan Pasir sangat halus (Very Fine Sand)
ANALYSIS OF THE EFFECTIVENESS OF JOINT HYDROGRAPHIC SURVEY INDONESIA - SINGAPORE - MALAYSIA TO ENHANCE SAFETY NAVIGATION IN THE STRAIT OF MALACCA AND SINGAPORE
Get PDFThe purpose of the Joint Hydrographic Survey (JHS) implementation in Straits of Malacca and Singapore (SOMS) is to improve navigation safety in TSS by using Multibeam Echosounder (MBES) technology. This is especially important given the increasing number of ships carrying out cross-transit through SOMS from year to year, while hydrographic information has not been updated since 1998. This study aims to analyze the effectiveness of JHS activities at SOMS conducted by Indonesia, Malaysia, and Singaporerelated to Indonesia's interests, specifications, and procedures, as well as the use of force in JHS activities. This study uses qualitative methods with an exploratory approach and used the NVivo Plus 12 application to find themes from field interviews and used the Soft System Methodology (SSM). Based on the results of the study can be concluded that the effectiveness of JHS activities has been following what is expected by the three coastal countries, but the Indonesian Navy Hydrographic and Oceanography Center or Pusat Hidrografi dan Oseanografi TNI AL (Pushidrosal) as a learning organization is required to continue to be able to improve its capabilities in the implementation of JHS. From the gap of research results obtained several activities that can be carried out by Pushidrosal to increase the effectiveness of JHS in SOMS namely by evaluating the implementation of Security Officer (SO) and Technical Officer (TO) as well as preparing SOP that can be used as a standard in the implementation of JHS activitie
Pengembangan Aplikasi Sistem Informasi Geografis Berbasis Web untuk Manajemen Data di Dishidros: Development of Web-Based Geographic Information System Applications for Data Management at Dishidros
No full textPerkembangan teknologi di bidang sistem informasi yang didukung oleh perkembangan teknologi jaringan membuat sistem informasi geografis terus berkembang dengan menawarkan berbagai kemudahan yang dapat meningkatkan kinerja dari suatu organisasi yang memanfaatkannya. Aplikasi berbasis web dipilih dalam skripsi ini disebabkan karena adanya tingkat perawatan aplikasi yang lebih mudah bila dibandingkan dengan aplikasi berbasis desktop.
Dalam penanganan data dalam aplikasi ini dibagi kedalam dua jenis data yaitu data yang mengandung informasi geografis (data spasial), dan data atribut.Dalam penanganan kedua jenis data ini terdapat perbedaan dalam hal pembuatan basisdata dan pengembangan aplikasi yang menggunakan basisdata tersebut.
Dishidros sebagai lembaga yang mengelola data spatial dalam hal ini penyediaan peta laut, sangatlah tepat memilih teknologi ini untuk meningkatkan kinerja dari organisasi.Dengan teknologi ini, maka kecepatan distribusi data/informasi yang diperlukan untuk membuat produk dishidros dapat meningkat, begitu juga biaya operasional, keamanan data, dapat lebih baik dari pada sistem konvensional
Perbandingan Koreksi Pasang Surut Terhadap Chart Datum Menggunakan Gnss Tide dan Tide Gauge (Studi Kasus Perairan Ancol Teluk Jakarta): Comparison of Tidal Corection Against Chart Datum Using GNSS Tide (Case Study of Ancol Waters, Jakarta Bay)
Get PDFBatimetri adalah ukuran dari tinggi rendahnya dasar laut yang merupakan sumber informasi utama mengenai dasar laut. Dalam pengolahan data batimetri diperlukan beberapa koreksi, salah satunya adalah koreksi pasang surut. Data pasang surut selama ini diperoleh dari pengamatan pasang surut yang dilakukan di stasiun pasang surut selama dilaksanakannya pemeruman. Perkembangan teknologi memberikan metode perekaman data pasang surut menggunakan Global Navigation Satelltie System (GNSS). Dalam tugas akhir ini dilaksanakan perekaman data GNSS yang dipasang pada sounding boat dengan metode Post-Processing Kinematic (PPK). Data yang diperoleh merupakan data tinggi permukaan air dari elipsoid yang kemudian dikurangkan dengan tinggi chart datum terhadap elipsoid. Hasil yang diperoleh kemudian digunakan untuk mereduksi kedalaman pada pengolahan data Multibeam Echosounder (MBES). Hasil dari penelitian ini berupa grafik perbandingan pasang surut GNSS tide dengan tide gauge dan perbandingan angka kedalaman pengolahan data MBES dengan koreksi pasang surut GNSS tide dan tide gauge
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
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