1,721,121 research outputs found

    ANALISIS TERJADINYA KERETAKAN TORAK PADA DIESEL GENERATOR DI MT. FERY XVI

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    INTISARI Subandriyo, 2020, NIT : 52155787.T, “Analisis Terjadinya Keretakan Torak Pada Diesel Generator Di MT. Fery XVI”, skripsi Program Studi Teknika, Progran Diploma IV, Politeknik Ilmu Pelayaran Semarang, Pembimbing I: Dwi Prasetyo, M.M, M.Mar.E. dan Pembimbing II: Janny Adriani Djari, S.ST, M.M Torak adalah bagian dari mesin diesel yaitu penekan udara masuk dan penerima tekanan yang menghasilkan pembakaran pada ruang bakar yang menghasilkan tenaga atau usaha dengan memanfaatkan udara dan suhu yang tinggi. Pada penulisan penelitian ini terjadi masalah pada diesel generator yang ditemukan yaitu terjadi keretakan pada keretakan torak pada diesel generator. Kemudian dilakukan penelitian untuk mencari faktor penyebab terjadi keretakan pada torak tersebut, mengetahui dampak yang disebabkan terjadi keretakan torak pada diesel generator, dan mengetahui upaya yang dilakukan terjadi keretakan torak pada diesel generator tersebut, supaya dapat mencegah terjadi kerusakan yang sama pada diesel generator khususnya torak yang retak.. Jenis metode penelitian yang peneliti gunakan dalam penyusunan skripsi ini adalah deskriptif kualitaf dengan menggunakan pendekatan fishbone analysis dan SHELL untuk mempermudah dalam teknik analisis data. Peneliti juga menggunakan metode pengumpulan data yang peneliti lakukan adalah dengan cara observasi, dokumentasi dan wawancara untuk memperkuat dalam analisis data dan pembahasan. Tujuan dari penelitian ini adalah untuk mengetahui faktor penyebab terjadinya keretakan torak pada diesel generator, dampak dari faktor penyebab terjadinya keretakan torak pada diesel generator dan upaya yang dilakukan untuk mencegah faktor penyebab terjadinya keretakan torak pada diesel generator di MT. Fery XVI. Berdasarkan hasil penelitian peneliti, dapat disimpulkan bahwa faktor penyebab terjadinya keretakan torak pada diesel generator di MT. Fery XVI adalah, 1)Tidak terlaksananya perawatan sesuai PMS 2) Kurang optimalnya pendingin dan pelumasan pada torak. 3) Masuknya air pada ruang bakar.4) kurangnya pengetahun terhadap torak. Dampak yang ditimbulkan adalah 1). Kinerja diesel generator menurun 2) Terjadinya overheat 3). Terjadi water hummer Upaya mencegah terjadinya keretakan torak pada diesel generator yang harus dilakukan adalah dengan, 1) Melaksanakan perawatan diesel genrator sesuai dengan PMS. 2) Melakukan perawatan sitem pelumasan. 3) Penggantian busing injector. 4) Memastikan spare part sesuai manual book. ABSTRACT Subandriyo, 2020, NIT: 52155787.T, "Analysis of the occurrence of piston cracks in diesel generators in MT. Fery XVI ", thesis of Engineering Study Program, Diploma IV Program, Semarang Shipping Polytechnic, Advisor I: Dwi Prasetyo, M.M, M.Mar.E. and Advisor II: Janny Adriani Djari, S.ST, M.M The piston is part of a diesel engine that is the inlet air pressure and pressure receiver that produces combustion in the combustion chamber that produces power or effort by utilizing high air and temperature. At the writing of this research, there was a problem in the diesel generator which was found that there was a crack in the piston crack in the diesel generator. Then a study was conducted to find the causes of cracks in the piston, to find out the impact caused by cracks in the diesel generator, and to find out the efforts made for cracks to occur in the diesel generator, so as to prevent the same damage to the diesel generator especially the piston cracked. The type of research method used by researchers in the preparation of this thesis is descriptive quality using fishbone analysis and SHELL approaches to facilitate data analysis techniques. Researchers also use data collection methods that researchers do is by observation, documentation and interviews to strengthen the data analysis and discussion. The purpose of this study was to determine the factors causing piston cracks in diesel generators, the impact of the factors causing piston cracks in diesel generators and efforts made to prevent factors causing piston cracks in diesel generators in MT. Fery XVI. Based on the research results of researchers, it can be concluded that the factors causing the black out of diesel generators in MT. Fery XVI is, 1) The maintenance is not in accordance with PMS 2) Less optimal cooling and piston lubrication. 3) Entry of water in the combustion chamber.4) lack of knowledge of the piston. The resulting impact is 1). Diesel generator performance decreases 2) Overheating occurs 3). Water hummer occurs Efforts to prevent cracks in the piston generator that must be done is by, 1) Carrying out diesel genrator maintenance in accordance with PMS. 2) Perform lubrication system maintenance. 3) Replacement of injector bushings. 4) Make sure the spare parts match the manual book

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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

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    “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

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    We 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

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    We 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

    Author Index

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    koamabayili/VECTRON-author-checklist: VECTRON author checklist

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    We 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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