1,720,957 research outputs found
The Application of Lamda-Mu-Rho Seismic Inversion for Conglomerate Reservoir Characterization in Melandong Field, Northwest Java Basin
Full text linkLamda () Mu () Rho () seismic inversion method has been applied to identify the distribution ofconglomerate reservoir in Melandong Field, Northwest Java Basin. This research used 3D pre-stack timemigration seismic dataset with one well data and a checkshot data. A sensitivity test analysis was done tosee the validity of the dataset and well seismic tie has been applied before generating a background modelfor the inversion processes. The outcomes of this research show that Lamda Rho ( ) inversion can be usedto detect the presence of hydrocarbon in a conglomerate rock and it is shown by value ranging between 33-39 (GPA*(Gr/cc)). Besides that, Mu Rho () inversion can indicate the rock type and it shows thatconglomerate has higher value (26 32 (GPA*(Gr/cc)) than claystone (20-26 (GPA*(Gr/cc)). By combiningboth Lamda-Rho and Mu-Rho inversion results, the distribution of the reservoir rock and hydrocarbon caneasily be detected and mapped
PENYULUHAN KONSEP KETEKNIKAN GEOLOGI DI AKADEMI DAKWAH INDONESIA, PROVINSI ACEH, UNTUK MENUNJANG PELAKSANAAN DAKWAH ISLAMIYAH
Full text linkIlmu geologi mempunyai peranan penting dalam berbagai lingkup kehidupan masyarakat termasuk dalam hal eksplorasi dan eksploitasi sumberdaya alam (minyak dan gas bumi, mineral, batubara), dan juga dalam hal mitigasi bencana alam kebumian (gempa bumi, tsunami, gunung meletus). Disamping itu, pengetahuan geologi juga berguna untuk keperluan kegiatan dakwah islamiyah. Berbagai macam fenomena geologi tertulis di dalam Al-Qur’an, namun banyak sekali para pendakwah (da’i) yang masih belum mampu menjelaskan hal tersebut secara keilmuan ilmiah. Untuk mengatasi permasalahan tersebut, maka dirasa perlu untuk diadakan kegiatan pengabdian ini. Materi keilmuan geologi yang diajarkan dalam kegiatan ini dikombinasikan dengan pemahaman keilmuan islamiyah untuk menjelaskan fenomena alam yang tercantum dalam Al-Qur’an. Kegiatan pengabdian ini memberikan manfaat yang cukup besar terutama untuk para peserta yang telah ikut berpartisipasi. Diantara dampak langsung yang dirasakan oleh para peserta yaitu adanya peningkatan wawasan, dan pengetahuan dasar geologi serta adanya peningkatan kompetensi para peserta dalam mengaitkan pemahaman keagamaan dengan keilmuan geologi dalam rangka pelaksanaan dakwah islamiyah. Dengan adanya kegiatan pengabdian masyarakat ini, diharapkan peningkatan kompetensi para peserta bisa digunakan semaksimal mungkin dalam melakukan kegiatan dakwah islamiyah.
Kata kunci: Fenomena Geologi, Al-Qur’an, Keilmuan Geologi.
ABSTRACT
Geology plays an important role in various spheres of human life, including in the exploration and exploitation of natural resources (oil and gas, minerals, coal), and also in the mitigation of natural disasters (earthquakes, tsunamis, mountain eruptions). Besides, geological knowledge is also useful for the purposes of Islamic activities. Geological phenomena are written in the Al-Qur’an, but many preachers are still unable to explain these scientifically. In order to solve this problem, it is considered necessary to hold training in the application of geological science to support the activities of Islamic teaching. The geological materials taught in this activity was combined with the understanding of Islamic science to explain some of the natural phenomena listed in the Al-Qur’an. This activity has been very beneficial, and among the direct impact felt by the participants is the improvement of insight, and basic knowledge of geology as well as the increased competence of the participants in linking the understanding of religion with geological science in the implementation of Islamic teaching. With this activity, it is expected that the increased competence of the participants can be used as much as possible in carrying out Islamic activities.
Keywords: Geological Phenomena, Al-Qur’an, Geological Science
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
Estimation of density log and sonic log using artificial intelligence: an example from the Perth Basin, Australia
Full text linkIt is well understood that with a large number of data, an excellent interpretation of the subsurface condition can be produced, and also our understandings of the subsurface conditions can be improved significantly. However, having abundant subsurface geological and petrophysical data sometimes may not be possible, mainly due to budget issues. This situation can generate issues during hydrocarbon exploration and/or development activities.
In this paper, the authors tried to apply artificial intelligence (AI) techniques to estimate outcomes values of particular wireline log data, using available petrophysic data. Two types of AI were selected and these are artificial neural network (ANN), and multiple linear regression (MLR). This research aims to advance our understanding of AI and its application in geology. There are three objectives of this study: (1) to estimate sonic log (DT) and density log (RhoB) using different types of AI (ANN and MLR); (2) to assess the best AI technique that can be used to estimate certain wireline log data; and (3) to compare the estimated wireline log values with the real, recorded values from the subsurface.
Findings from this study show that ANN consistently provided a better accuracy percentage compared to MLR when estimating density log (RhoB). While using different set of data and technique, estimation of sonic log (DT) produced different accuracy level. Moreover, crossplot validation of the results show that the results from ANN analysis produced higher trendline reliability (R2) and correlation coefficient (R) than the results from MLR analysis. Comparison of the estimated RhoB and DT log data with the original recorded data shows minor mismatch. This is evident that AI technique can be a reliable solution to estimate particular outcomes of wireline log data, due to limited availability of the original recorded subsurface petrophysic data. It is expected that these findings would provide new insights into the application of AI in geology, and encourage the readers to explore and expand the many possibilities of the application of AI in geology
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
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