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ANALISIS TINDAKAN PREVENTIVE MAINTENANCE PADA ISOLASI TRANSFORMATOR DAYA BERDASARKAN INDEKS POLARISASI DAN TANGEN DELTA (Studi Kasus: PT.PLN Gardu Induk Garuda Sakti Pekanbaru )
Get PDFSYAHRIZAN (2023) : ANALISIS TINDAKAN PREVENTIVE MAINTENANCE PADA
ISOLASI TRANSFORMATOR DAYA BERDASARKAN INDEKS
POLARISASI DAN TANGEN DELTA
(Studi Kasus: PT.PLN Gardu Induk Garuda Sakti Pekanbaru )
Transformator daya adalah suatu alat kelistrikan yang bertugas untuk memindahkan tegangan tinggi ke
tegangan rendah atau sebaliknya (konversi tegangan). Kesalahan pada transformator dapat menyebabkan
pemadaman listrik, sehingga perlu adanya perawatan dan pengujian dilakukan agar transformator daya dapat
beroperasi sesuai masa pemakaiannya. Dalam operasi penyaluran tenaga listrik transformator merupakan
jantung dari transmisi dan distribusi.Untuk meminimalisir kerusakan pada transformator harus dipelihara
dengan menggunakan sistem dan peralatan yang tepat. Preventif Maintenance perlu dilakukan untuk
perawatan dan pengujian pada transformator daya sebagai pencegahan terjadinya kegagalan operasi.
Preventive maintenance sendiri merupakan pemeliharaan yang dilakukan sebagai pencegahan transformator
mengalami kerusakan. Ada beberapa bagian penting pada transformator daya yang membutuhkan
pemeliharaan rutin dan khusus salah satunya adalah sistem isolasi. Menurut statistik, kesalahan isolasi
mencapai 80% dari semua kesalahan transformator.. Pada penelitian ini peneliti melakukan pengujian indeks
polarisasi dan tangen delta di Gardu Induk Garuda Sakti untuk mengetahui bagus atau tidaknya kinerja
tranformator. Pertama, pengujian indeks polarisasi yang dihitung sesuai dengan standar. Hasil pengujian
indeks polarisasi (IP) transformator daya GI garuda sakti didapat nilai yang dinyatakan sudah memenuhi
standar pengujian masih dikatakan baik yaitu rata-rata diatas 2,0. Kedua, pengujian tangen delta yang
bertujuan untuk mengetahui kualitas isolasi suatu perlatan listrik dan untuk mengukur arus bocor kapasitif
padaa transformator. Hasil pengujian Tangen Delta menunjukkan bahwa nilai kondisi tangen delta masih
dalam kategori sangat baik dengan rata - rata tangen delta kecil dari 0,1%.
Kata Kunci : Tranformator daya, Tahanan Isolasi, Indeks Polarisasi (IP), Disipasi Dielektrik (tan ʠ
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
ANALISIS PUTUSAN PENGADILAN NEGERI IDI NOMOR. 169/PID.B/2017/PN-IDI TENTANG PENGANIAYAAN YANG MENYEBABKAN KEMATIAN
Get PDFSYAHRIZAN RIVALDI,2020ANALISIS PUTUSAN PENGADILAN NEGERI IDI NOMOR. 169/PID.B/2017/PN-IDI TENTANG PENGANIAYAAN YANG MENYEBABKAN KEMATIAN.Fakultas Hukum, Universitas Syiah kuala (v,74), pp.,bibl.,app.ABSTRAKNurhafifah, S.H., M.Hum.Putusan Pengadilan Negeri nomor 169/Pid.b/2017/Pn.Idi, terdakwa Rahmad Jaini, Khaidir, dan Ismail Ibrahim terbukti bersalah melakukan penganiayaan yang menyebabkan kematian dan dijerat pidana dengan pasal 170 ayat (2) Ke-3 KUHP Tentang Perusakan atau Pasal 353 ayat (3) KUHP Jo pasal 55 ayat (1) Ke-1 KUHP tentang Penganiayaan atau Pasal 351 ayat (3) KUHP Jo Pasal 55 ayat (1) Ke-1 KUHP. Namun dalam hal ini permasalahan yang didapat yaitu Penuntut Umum tidak tepat dalam menentukan dakwaaan yang digunakan dalam perkara ini. Seharusnya penuntut umum harus membuat surat dakwaan dengan tepat.Tujuan dari penelitian ini ialah untuk menjelaskan tindakan penuntut umum yang kurang tepat dalam menentukan surat dakwaan, yang mana jika melihat pasal yg berkaitan dengan perkara ini, surat dakwaan yang lebih tepat digunakan yaitu surat dakwaan subsidair, dan hakim dalam menjatuhkan putusan belum memenuhi keadilan, kepastian, dan kemanfaatan hukum.penelitian ini bersifat studi kasus apabila dilihat dari tujuannya termasuk dalam bagian penelitian normatif (Normative Legal Research). data yang digunakan melalui studi kasus kepustakaan guna memperoleh data sekunder yaitu melalui serangkaian kegiatan membaca, mengutip, dan menelaah peraturan perundang-undangan yang berkaitan dengan objek penelitian. Alat penelitian yang digunakan adalah studi dokumen berupa putusan pengadilan negeri Idi nomor 169/Pid.b/2017/Pn.Idi selaku putusan pengadilan yang berkaitan dengan kasus yang diteliti.Hasil penelitian ini menunjukkan bahwa penuntut umum kurang tepat dalam menentukan surat dakwaan yang digunakan dalam putusan nomor 169/Pid.B/2017/Pn-Idi, seharusnya penuntut umum menggunakan dakwaan subsidair yang mana jika melihat pasal yang berkaitan dengan perkara ini dakwaan yang lebih tepat yaitu dakwaan subsidair dan hakim dalam menjatuhkan putusan belum memenuhi keadilan, kepastian dan kemanfaatan hukum.Saran bagi Penuntut Umum agar lebih teliti dalam membuat surat dakwaan dan majelis hakim harus lebih memenuhi keadilan, kepastian dan kemanfatan hukum dalam menjatuhkan putusan
Impact of workers’ welfare after MSPO implementation / Nurul Nabilah Mohyidin and Syahrizan Syahlan
Get PDFSustainable palm oil is an approach to oil palm agriculture that aims to produce palm oil without causing deforestation or harming people. The Malaysian Sustainable Palm Oil (MSPO) standard has been made mandatory by the end 2019. In the context of palm oil sustainability, the similar type of scheme been implemented are Roundtable Sustainable Palm Oil (RSPO) and Indonesia Sustainable Palm Oil (ISPO). Most of the research on MSPO implementation are focus more on awareness and factors but a very lack of study was conducted to identify the impact of MSPO. This study is to identify the impacts of worker’s welfare after MSPO implementation. This study covers knowledge, perceived benefits and government support as independent variables. A total 52 respondents were at Syarikat Perladangan Peserta Kundang Ulu, Tangkak, Johor. All the variables are positive relationship. In addition, knowledge (0.730) shows a very strong relationship towards the dependent variable. The results shows that the R² is 0.610 which indicate that 61% of the independent variables have been identified in this study. However, result of regression shows that there is no significant relationship between government support and the impacts of MSPO. Hence, it can be concluded that the most dominant impact of workers’ welfare after MSPO implementation is knowledge. From these three impacts, perceived benefits and knowledge gave influence towards worker’s welfare after MSPO implementation
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
Worker’s acceptance towards Malaysian Sustainable Palm Oil / Mohammad Zulkeflie Zakaria and Syahrizan Syahlan
Get PDFAcceptance towards something is really crucial especially those who involve in plantation industry. The implementation of Malaysian Sustainable Palm Oil (MSPO) will give a huge impact to company as well as the workers. Acceptance of workers towards MSPO should be noted as it can affect plantation operation and also the daily operation in estate. The objective of this study is to investigate the factors of workers acceptance towards MSPO and also to study the most dominant factor that will influence workers acceptance towards MSPO. A questionnaire was used to collect primary data about worker’s communication, training, estate support, attitude, knowledge and benefit towards their acceptance to MSPO. The surveys conducted at Syarikat Perladangan Peserta Kundang Sendirian Berhad (SPPK Sdn. Bhd.) There were 60 population of workers and only samples of 52 respondents were randomly selected based on Krejcie and Morgan table. Cronbach’s Alpha shows value more than 0.7 for all variables which indicates all the questions is consistent. Keiser-Meyer-Olkin (KMO) value is 0.690 near to 0.7 which means the sample is nearly adequate. The results show that the R Square is 0.770 which indicates 77% of workers acceptance being explained by the independent variables. Knowledge and communication have a strongly positive relationship while estate support has moderate positive relationship between acceptance. These correlation shows that these three factors are affecting the acceptance of workers. Result of regression shows that knowledge is the most dominant factor towards workers acceptance followed by communication and estate support. Hence, it can be concluded that all the objectives being answered
The best efficacy in herbicides application towards oil palm seedling management / Muhammad Fakhruddin Kamarul and Syahrizan Syahlan
Get PDFThe spray application of agrochemical is effective but inefficient. Generally, the performance of the pesticides will be effective in consistence with the decrease of droplets sizes. The field study was carried out to compare pesticide equipment which are the conventional knapsack sprayer (CKS) and motorised mistblower. It was also carried out to discover the interaction of seedlings with systemic pesticide and non-systemic pesticide. This theory, as tested at the field experiment, was done with oil palm seedlings at the age of 5 months before the first culling process occurs. The pesticides application was performed once per month to eradicate pests and diseases in the oil palm nursery. The conventional knapsack sprayer was recorded to produce medium sized droplets (≥150 μm). Meanwhile, motorised mistblower was seen to produce fine sized droplets (≤150μm). A significant difference was identified when using the conventional knapsack sprayer and the motorised mistblower. However, there were no variances discovered between the use of systemic and non-systemic pesticide. The effectiveness of spraying application factors in the droplets size in order to find the correct choices and the best use of different pesticide equipment. The result of this study measures the number of oil palm seedlings that have been culled as indicators to make the comparison between conventional knapsack sprayer and motorised mistblower. The estimation of total loss and total cost per hectare were calculated to find the highest loss of oil palm seedling. Each seedling was recorded at a price of RM12.00
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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