1,720,982 research outputs found
New insights into submarine geohazard and sediment transport revealed by repeat seafloor surveys
No full textThe prevalence of submarine geohazards poses significant threats to coastal communities and global economies. This thesis investigates three main types of submarine geohazards: submarine landslides, submarine channel evolution, and volcaniclastic density currents triggered by volcanic eruptions. Utilizing innovative repeat seafloor surveys, the research aims to elucidate the processes behind these hazards and their implications for hazard assessment, sediment transport pathways, and depositional fate. The survey compare seafloor changes as long as between 13 years (Knight inlet) as well as daily changes (Squamish prodelta). The study examines various settings prone to different submarine geohazards, including a submarine prodelta linked to a seasonally active meltwater-fed river (Squamish Prodelta), a confined fjord’s submarine channel system (Knight Inlet), and a remote volcanic island affected by a massive eruption (Hunga Tonga Volcano). The research seeks to enhance understanding of seafloor evolution, its effects on coastal infrastructure, and the interpretation of past sediment transport events from seafloor and depositional archives. Each chapter addresses a specific aspect of submarine geohazards, highlighting the central role of sediment dynamics. For instance, in the submarine channels of Knight Inlet, it is demonstrated for the first time that channel curvature significantly influences dominant processes and the rate of channel migration, with a threshold normalized radius of curvature of 1.54. The investigation of delta slope failures in Squamish Prodelta reveals that sediment loading and slope geometry are critical factors affecting the occurrence and magnitude of these failures. The study of seafloor changes following the Hunga Tonga volcanic eruption underscores the diverse scales of bedforms shaped on the seafloor and their impact on density flow pathways, ranging from zero to forty kilometres from the caldera. The identified hazards span a wide spatial and temporal spectrum, from events recurring over centuries (Hunga Tonga eruption) to daily occurrences (upstream-migrating bedforms in Squamish Prodelta). This thesis offers a nuanced understanding of the processes leading to submarine geohazards, emphasizing sediment dynamics' pivotal role. It advocates for continuous reassessment based on new empirical evidence. The implications extend beyond the specific geological phenomena studied, offering valuable insights for geological studies, environmental management, and risk assessment in submarine environments. The thesis concludes with a call for further exploration, emphasizing the need for ongoing monitoring, data acquisition, and interdisciplinary studies. This approach is essential to enhance understanding of submarine geohazards, contributing to the development of resilient infrastructure and improved hazard mitigation strategies.<br/
Perpustakaan Digital: Pembangunan sumber secara kolaboratif (fokus kepada tempat-tempat bersejarah di Malaysia) / Zulkifli Muhamad
Full text linkMalaysian History Online (MHO) merupakan sebuah sistem perpustakaan digital yang mana sumber-sumber bagi sistem ini dibangunkan secara kolaboratif dan memfokuskan kepada tempat-tempat bersejarah di Malaysia. MHO direkabentuk bagi menyediakan fungsi-fungsi seperti fungsi carian, rujukan pe!bandingan dan sistem antaramuka ramah pengguna. Salah satu ciri khas yang terdapat di dalam sistem ini adalah menyokong penghantaran bahan secara atas talian oleh para pengguna terutamanya oleh pengguna
yang ingin berkongsi bahan dengan pengguna lain dengan cara memuatnaik bahan tersebut ke dalam sistem. Selain itu, terdapat juga papan bulletin yang akan menyiarkan
berita-berita semasa dan dikemaskini oleh pentadbir. Sistem MHO ini terdiri daripada sepuluh modul utama iaitu Modul Penyelenggaraan, Modul Pengesahan, Modul Pendaftaran, Modul Carian, Modul Pengindeksan, Modul Muatnaik, Modul Laporan dan Modul Pengurusan Maklumat.
Modul Penyelenggaraan dan Modul Muatnaik merupakan dua buah modul yang menyokong pembangunan sumber secara kolaboratif MHO ini akan dibangunkan dengan menggunakan Active Server Page sebagai bahasa pengaturcaraan utama dan Microsoft Access 2000 sebagai Sistem Pengurusan Pangkalan Data. Windows 2000 dan Internet Information Server 5.0 pula digunakan sebagai pelayan web. Sistem MHO ini merupakan peralatan yang boleh digunakan bagi meningkatkan kualiti pembelajaran dan pengajaran semasa serta akan menjadi sebuah pembangunan sumber tempatan secara kolaboratif untuk para guru, para pelajar dan para peminat sejarah tempatan. Sistem ini juga akan mendedahkan kepada para pelajar mengenai teknologi perpustakaan digital
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
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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