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ANALISA FATIGUE KONTRUKSI DOUBLE BOTTOM AKIBAT ALIH FUNGSI FRESH WATER TANK MENJADI RUANG MOORING WINCH PADA KAPAL ACCOMODATION WORK BARGE (AWB) 5640 DWT DENGAN METODE ELEMEN HINGGA Wibowo, Wahyu; Mulyatno, Imam Pujo; Trimulyono, Andi
Jurnal Teknik Perkapalan Vol 3, No 4 (2015): OKTOBER
Publisher : Diponegoro University

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Abstract

Accomodation work barge merupakan jenis kapal tongkang kerja yang tidak memiliki alat penggerak sendiri yang pada prinsipnya dipakai sebagai tempat akomodasi bagi karyawan perusahaan offshore. Kapal ini memiliki 8 jangkar dengan 2 Mooring winch, dimana peletakannya berada di atas double bottom sehingga double bottom menerima beban tarik dan beban tekan. Pada daerah yang mengalami tegangan tersebut dilakukan analisa fatigue untuk meninjau titik paling rawan terjadinya kelelahan material dengan bantuan program numeric Finite element method (FEM) dan MSC software. Analisa yang digunakan adalah analisa beban dinamis yang berasal dari beban total dan gaya tarik mooring winch. Beban mooring winch sebesar 49 ton dan beban gaya tarik sebesar 421,77 KPa, batas lelah baja ? 200 MPa. Hasil analisa fatigue diambil nilai stress terbesar dan diambil nilai siklus terpendek pada setiap variasi pembebanan. Berdasarkan tiga variasi kondisi pembebanan yaitu kondisi muatan penuh dan gaya tarik, kondisi sagging dan kondisi hogging memperoleh nilai stress. Kondisi beban mooring  memperoleh nilai stress sebesar ? 158 Mpa, siklus terpendek sebesar N 0,951 x 108 cycle, fatigue factor of safety 1,72, memiliki umur 27,77 tahun. Kondisi sagging memperoleh nilai stress sebesar ? 158 MPa, siklus terpendek sebesar N 0,951 x 108 cycle,  fatigue factor of safety 1,71, memiliki umur 27,77 tahun. Kondisi hogging memperoleh nilai stress sebesar ? 158 Mpa, siklus terpendek sebesar N 0,951 x 108 cycle,  fatigue factor of safety 1,71, memiliki umur 27,77 tahun.
INTEGRATION OF SYNTHETIC MINORITY OVERSAMPLING TECHNIQUE FOR IMBALANCED CLASS Santoso, Noviyanti; Wibowo, Wahyu; Hikmawati, Hilda
Indonesian Journal of Electrical Engineering and Computer Science Vol 13, No 1: January 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v13.i1.pp102-108

Abstract

In the data mining, a class imbalance is a problematic issue to look for the solutions. It probably because machine learning is constructed by using algorithms with assuming the number of instances in each balanced class, so when using a class imbalance, it is possible that the prediction results are not appropriate. They are solutions offered to solve class imbalance issues, including oversampling, undersampling, and synthetic minority oversampling technique (SMOTE). Both oversampling and undersampling have its disadvantages, so SMOTE is an alternative to overcome it. By integrating SMOTE in the data mining classification method such as Naive Bayes, Support Vector Machine (SVM), and Random Forest (RF) is expected to improve the performance of accuracy. In this research, it was found that the data of SMOTE gave better accuracy than the original data. In addition to the three classification methods used, RF gives the highest average AUC, F-measure, and G-means score.
PENGGUNAAN REGRESI LOGISTIK STEPWISE DAN ALGORITMA GENETIKA DALAM PEMILIHAN RASIO KEUANGAN YANG BERPENGARUH TERHADAP RATING ISSUER wibowo, wahyu; kurniawan, gangsar
MATEMATIKA Vol 10, No 1 (2007): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

 Obligation is one of the financial instruments that can be traded in stock exchange.  To help investors, an obligation has rating that shows its prospect.  Obligation rating is influenced by many factors.  This research will study the effects of financial ratio to rating.  Unfortunately, there are many financial ratios that influence rating, so selection to financial ratio must be done.  For this purpose, two methods will be applied, i.e stepwise logistics regression and genetics algorithm-artificial neural network.  The result shows, that for stepwise logistic regression correctly gives classification 71%, and genetics algorithm 100% training data. For testing data, both methods give the same result, 62% correctly.  Genetics algorithm results selected financial ratio more better than stepwise logistic regression.  
PERANCANGAN SISTEM HIBRID PEMBANGKIT LISTRIK TENAGA SURYA DENGAN JALA-JALA LISTRIK PLN UNTUK RUMAH PERKOTAAN Liem Ek Bien, Liem Ek Bien; Kasim, Ishak; Wibowo, Wahyu
Jurnal Teknik Elektro Vol 8, No 1 (2008)
Publisher : Jurnal Teknik Elektro

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Abstract

Solar cell is one of renewable energy. Solar cell can convert directly sunlight dissociationenergy of diatomic to become electric energy. Electric energy yielded by solar cell hardlyinfluenced by the sun intensity of light received, so that solar cell can only yield electricenergy if there are sunlight. Supply of electric energy should be able to be applied everytime. Hybrid of solar energy alternator (PLTS) with electrical grid of PLN will yieldcontinuous supply of electric energy. At this hybrid system, electrical supply from PLTS isdesigned to be around 30% from overall load of electrical equipment in household, the restload around 70% is fulfilled by PLN.Hybrid process of PLTS with the electrical grid iscontrolled by a switch controller which its working principal based on one way direction;when PLTS works (on), hence electric supply from PLN is disconnected and so vice versa.Keywords: solar cell, hybrid system, switch controller
PENINGKATAN AKTIVITAS DAN HASIL BELAJAR MATEMATIKA MENGGUNAKAN MODEL COOPERATIVE LEARNING TIPE MAKE A MATCH Wibowo, Wahyu; Ambarita, Alben; Astuti, Nelly
Jurnal Pedagogik Vol 1, No 6 (2013): Jurnal Pedagogi
Publisher : Jurnal Pedagogik

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Abstract

The purpose of this research is to increase the activity and student mathematics learning outcomes in fourth grades of elementary school 02 Sindang Agung academic years 2012/2013 by using cooperative learning model type make a match. A method was used in this research is classroom action research. It consists of three cycles and each cycle consists of 4 steps; planning, acting, observing and reflecting. A data collecting tool were used in research is observation paper for student activity and teacher’s performance and student learning test. A result of data collecting were analyzed by using a qualitative and quantitative analysis. A result showed an increase in student activity and mathematics learning outcomes. It can be seen from the average student activity in cycle I is 54,48% with enough active category, increase in cycle II to be 66,67% with enough active category, and increase in cycle III to be 79,58% with active category.Tujuan penelitian adalah meningkatkan aktivitas dan hasil belajar matematika siswa kelas IV SDN 02 Sindang Agung tahun pelajaran 2012/2013 dengan menerapkan model cooperative learning tipe make a match. metode yang digunakan dalam penelitian adalah penelitian tindakan kelas. Penelitian terdiri tiga siklus yang setiap siklusnya terdiri atas 4 tahapan yaitu perencanaan, pelaksanaan, observasi, dan refleksi. Alat pengumpul data aktivitas dan kinerja guru adalah lembar observasi, dan tes untuk data hasil belajar. Data penelitian dianalisis dengan analisis kualitatif dan kuantitatif. Hasil penelitian menunjukkan adanya peningkatan aktivitas dan hasil belajar matematika. Hal ini didukung data aktivitas pada siklus I dengan rata-rata sebesar 54,48% (kategori cukup aktif), pada siklus II meningkat menjadi 66,67% (kategori cukup aktif), dan siklus III meningkat menjadi 79,58% (kategori aktif). Kata kunci: aktivitas, cooperative  learning, hasil, make a match
Konspirasi Media Massa Dan Pengembalian Bahasa Pada Hakikatnya : Sebuah Penerapan Metode Analisis Tindak Tutur Komunikasi Wibowo, Wahyu
Kanz Philosophia : A Journal for Islamic Philosophy and Mysticism Volume 4 Number 2, December 2014
Publisher : Sekolah Tinggi Filsafat Islam (STFI) Sadra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20871/kpjipm.v4i2.66

Abstract

Abstrak : Abad ke-21 dapat disebut sebagai Abad Bahasa, mengingat kehidupan manusia dewasa ini tidak dapat dilepaskan dari pelbagai bentuk media massa. Akan tetapi, terkait dengan pengonstruksian fakta dan realitas, apalagi jika dilumuri oleh ego-sentris subjek-subjek di balik media massa tersebut, kerap terjadi bias pemberitaan yang memicu problem etis. Artinya, terjadi konspirasi di balik pemberitaan yang berdampak pada pengerdilan fungsi media massa sebagai wadah pendidikan politik bagi rakyat dalam kehidupan berbangsa dan bernegara. Demi membongkar konspirasi tersebut dibutuhkan metode analisis teks media yang baru, yang di dalam tulisan ini disebut metode analisis tindak tutur komunikasi. Metode ini dilahirkan secara hereustik, kritis, dan kontekstual melalui prinsip-prinsip kontemporer aliran Filsafat Bahasa Sehari-hari. Dengan demikian, metode ini selain hendak menegaskan bahwa komunikasi massa harus dilakukan secara etis dan emansipatoris, sekaligus hendak mengoreksi eksistensi metode analisis teks media lainnya yang selama ini sudah dikenal, namun tidak berdaya ketika harus membongkar konspirasi di balik pemberitaan media massa.Kata kunci : problem etis, metode analisis tindak tutur komunikasi, filsafat bahasa sehari-hari, analisis teks media. Abstract : The twenty-first century may be referred toas the century of language, considering how human life is inseparable from the various forms of mass media. However, concerning the construction of facts and reality, especially whenever mass-media becomes colored by ego-centric tendencies, biases in reporting frequently occur that raise ethical problems. It follows that there has been a conspiracy behind mass-media that has impact inobstructing the function of media as a forum for political education for the people. Therefore, in order to reveal the conspiracy a new media text analysis method -- which in this paper is called speech-act analysis method of communication -- is required. The method is heuristically, critically and contextually brought about through contemporary principles of Ordinary Language Philosophy. Thereby, in addition asserting that mass communication should be used ethically and with emancipation, this method will also examine the other media text analysis methods which have been known but may not be useful to discover conspiracy behind mass-media reports.Keywords : ethic problem, speech-act analysis method of communication, ordinary language philosophy, analysis of media texts.
Transportation and Its Ethical Problem Wibowo, Wahyu; A. Silalahi, Siska; Lestari Ningrum, Selli
JURNAL MANAJEMEN TRANSPORTASI & LOGISTIK Vol 1, No 2 (2014): JURNAL MANAJEMEN TRANSPORTASI & LOGISTIK
Publisher : STMT Trisakti

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Abstract

Transportation problem is a common problem in modern life. The impact of increasingly severe traffic congestion, for example, shows the transport problems are inevitable. However, when the problem is transformed into an ethical problem, it can be said that the ethos of the nation is in danger of experiencing a slump. Phenomenological method of research through language is used with the basis of the speech act theory of communication, after tracing automotive advertising published by newspaper in Jakarta (from March 2013 to March 2014), the result shows that Indonesian transportation latest ethical problem leads to a conspiracy carried out by the newspapers and the advertisers. Keywords: transportation, phenomenological language, speech act theory of communication, advertising.
PEMANTAPAN PRINSIP FILSAFAT BAHASA BIASA SEBAGAI UPAYA PEMUTAKHIRAN METODE ANALISIS PESAN KOMUNIKASI Wibowo, Wahyu
Kajian Linguistik dan Sastra Vol 23, No 1 (2011)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/kls.v23i1.4317

Abstract

Filsafat Bahasa Biasa berkembang pesat di Inggris pada awal abad ke-20. Ludwig Wittgenstein, pendirinya, menggarisbawahi bahwa di dalam kehidupan ini banyak sekali tata permainan bahasa yang mencerminkan nilai-nilai kehidupan masyarakat penggunanya. Aliran Filsafat Bahasa Biasa kemudian memengaruhi kelahiran fenomenologi Husserl, Aliran Kritis Habermas, dan Postmodernisme Lyotard. Sebagaimana diperlihatkan oleh tulisan ini, Filsafat Bahasa Biasa dijadikan tulang punggung metode analisis pesan komunikasi yang mutakhir, yang disebut dalam istilah metode analisis tindak tutur komunikasi. Metode tindak tutur komunikasi, atau metode analisis isi pesan komunikasi, pada dasarnya lebih berdaya guna untuk menganalisis media massa, sekalipun dapat pula digunakan untuk menganalisis pelbagai wujud wacana lainnya. Secara ontologis dan kritis, metode tindak tutur komunikasi merupakan pemutakhiran dari sejumlah metode analisis wacana yang sudah dikenal umum, seperti metode semiotika, metode analisis wacana kritis, dan metode pembingkaian.Kata Kunci: Filsafat Bahasa Biasa, analisis wacana, metode isi pesan komunikasi,metode tindak tutur komunikasi.
Transportation and Its Ethical Problems Wibowo, Wahyu; Silalahi, Siska A.; Ningrum, Selli Lestari
JURNAL MANAJEMEN TRANSPORTASI & LOGISTIK Vol 1, No 2 (2014): JULI
Publisher : Sekolah Tinggi Manajemen Transportasi (STMT) Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25292/j.mtl.v1i2.10

Abstract

Transportation problem is a common problem in modern life. The impact of increasingly severe traffic congestion, for example, shows the transport problems are inevitable. However, when the problem is transformed into an ethical problem, it can be said that the ethos of the nation is in danger of experiencing a slump. Phenomenological method of research through language is used with the basis of the speech act theory of communication, after tracing automotive advertising published by newspaper in Jakarta (from March 2013 to March 2014), the result shows that Indonesian transportation latest ethical problem leads to a conspiracy carried out by the newspapers and the advertisers.
KEMARITIMAN INDONESIA: SEBUAH KAJIAN KRITIS Wibowo, Wahyu
JURNAL MANAJEMEN TRANSPORTASI & LOGISTIK Vol 4, No 2 (2017): JULI
Publisher : Sekolah Tinggi Manajemen Transportasi (STMT) Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25292/j.mtl.v4i2.75

Abstract

The purpose of this paper is to examine the vision of Indonesia as a maritime axis of the world. This vision is important, in addition to its worldwide scale content, and also directly addressed by the President of the Republic of Indonesia Joko Widodo at the East Asia Summit in Nay Pyi Taw, Myanmar on November 13, 2015. This vision is increasingly important because there are still many of our marine problems, particularly those relating to security and economic issues, are suspected to weaken that vision. Using heuristic technique and eclectic method, philosophical study of this qualitative descriptive type will center on the Presidents speech and the national newspaper coverage of maritime problems, which likely raises the ethical problems of nation and state. As a result, Indonesias vision as a maritime axis of the world should be manifested with a critical note.