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SCHEDULING FLEXIBLE MANUFACTURING SYSTEM WITH STACKER CRANE USING COLOURED PETRI NETS Setiawan, Ari; Sitepu, Teguh Ersada Natail
Jurnal Teknik Industri Vol 20, No 2 (2018): December 2018
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1484.83 KB) | DOI: 10.9744/jti.20.2.113-126

Abstract

Scheduling Flexible Manufacturing System (FMS) can increase production speed and accuracy. It because FMS has an ability to process various variety of product at same work station. However, FMS need efficient allocation of resources, for example: allocation of material handling equipment. This paper presents production scheduling FMS modelling to 24 jobs and 4 machines considering stacker crane. Coloured Petri Nets (CP-Nets) is the programming language which used to simulate model because it?s simplicity. This model consists two main model activities. The first one is Physical Activity (PA) which related to every activity that involve physical movement, including stacker crane processes. PA consist five CP-Nets models: loading/unloading station, stacker crane, machine, picking mechanism, and pallet stocker. The second activity is Logical Expression (LE) which related to the rules on how FMS should operate. LE consist three CP-Nets models: machine selection, pick-up request, and stage two procedure.  A simulation and numerical report show utilization level of all machines around 80-84% and stacker crane 8,74%. 
FACTORS THAT DETERMINE THE CREDIT-LENDING FEASIBILITY ON KOPAAS HIPPATAS Mukodim, Didin; Setiawan, Ari
Jurnal Ilmiah Ekonomi Bisnis Vol 13, No 3 (2008): ENGLISH
Publisher : Universitas Gunadarma

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Abstract

Banking and non-banking financial institutions entrench within their credit-lending policy the feasibility standards for their debtor candidates. Standards and procedures are established to avoid upcoming problematic credits, for example happened when a debtor is unable to pay the credit. The objective of this research is to identify factors that affect debtor’s feasibility in getting a loan/credit. For its study focus, this research uses Kopaas Hippatas a cooperative in Tasikmalaya. The influential factors are acquired using discriminant analysis. Discriminant analysis enables the authors to clearly identify the differences and to classify debtor candidates into potential non-problematic and problematic in the term of paying the loan. The analysis corroborates four factors in determining credit lending of Kopaas Hippatas, i.e. credit amount, debtor age, number of dependant and settled installments; also affirmed in this study are two predictors, i.e. number of dependant and proposed credit amount. Credit amount is confirmed as the most dominant and significant factor in categorizing the debtor behavior in term of paying the credit.Keywords: credit lending, postponed debtor, budget and installment
Perbandingan Antara Multi Atribut Seismik Regresi Linier dan Multi Atribut Seismik Probabilistic Neural Network Untuk Estimasi Porositas Reservoir Batu Pasir Pada Lapangan Minyak Teapot Dome Aziz, Zulfani; Setiawan, Ari
Jurnal Fisika Indonesia Vol 20, No 1 (2016)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1713.557 KB) | DOI: 10.22146/jfi.28006

Abstract

Dalam eksplorasi minyak bumi, informasi tentang batuan di bawah permukaan bumi sangat diperlukan untuk mengetahui zona reservoir target eksplorasi yang salah satunya adalah porositas batuan. Untuk mendapatkan informasi porositas batuan digunakan metode multiatribut seismik yang dapat mengestimasi porositas dari atribut-atribut seismik. Metode multiatribut seismik memiliki dua jenis yaitu regresi linier dan probabilistic neural network (PNN). Penelitian ini bertujuan untuk mengetahui metode multiatribut seismik mana yang memberikan hasil yang lebih baik dalam mengestimasi nilai porositas batu pasir di lapangan minyak Teapot Dome. Pada penelitian ini digunakan tiga atribut seismik yaitu atribut impedansi akustik, integrate, dan amplitude weighted frequency. Multiatribut seismik regresi linier menganggap hubungan ketiga atribut seismik dan porositas adalah linier sedangkan multiatribut seismik probabilistic neural network menganggap hubungannya non linier. Hasil penelitian menunjukan bahwa metode multiatribut seismik regresi linier memberikan estimasi porositas dengan nilai korelasi 0,701 dan validasi 0,649, sedangkan metode multiatribut seismik probabilistic neural network memberikan estimasi porositas lebih baik dengan nilai korelasi 0,920 dan validasi 0,683. Hasil lain juga memperlihatkan bahwa bentuk kurva log porositas hasil estimasi probabilistic neural network lebih cocok dengan log porositas asli dibandingkan log porositas hasil estimasi regresi linier. 
FAKTOR-FAKTOR YANG MENENTUKAN KELAYAKAN PEMBERIAN KREDIT PADA KOPAAS HIPPATAS Mukodim, Didin; Setiawan, Ari
Jurnal Ilmiah Ekonomi Bisnis Vol 13, No 3 (2008)
Publisher : Universitas Gunadarma

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Abstract

Dalam memberikan kredit, lembaga keuangan perbankan dan bukan perbankanmenetapkan standar kelayakan seorang calon debitur mendapatkan pinjaman.Penetapkan standar dan prosedur ini dilakukan untuk menghindari kredit bermasalahyang mungkin akan terjadi dikemudian hari, seperti debitur tidak mampu melunasihutangnya dikarenakan satu atau lain hal. Tujuan dari penelitian ini adalah untukmengidentifikasi faktor apa yang berpengaruh dalam pemilihan layak tidaknyaseorang debitur mendapatkan pinjaman. Objek dalam penelitian ini adalah Koperasiyang terletak di Kota Tasikmalaya yaitu Kopaas Hippatas. Untuk mengetahui faktorfaktoryang berpengaruh, dapat menggunakan analisis diskriminan. Dengan analisisdiskriminan dapat membuat model yang secara jelas dapat menunjukkan perbedaandan mengklasifikasikan kasus ke dalam grup debitur yang lancar maupun tidak lancardalam pembayaran kredit. Hasil analisis dari empat faktor yang menentukankelayakan pemberian kredit pada Kopaas Hippatas yang terdiri dari besarnyapinjaman, umur debitur, tanggungan yang dimiliki dan angsuran yang diberikan,terdapat dua prediktor yang paling signifikan pengaruhnya. Dua prediktor tersebutadalah tanggungan yang dimiliki dan pinjaman yang diajukan. Besarnya pinjamanyang diberikan merupakan hal yang paling dominan atau signifikan dalammembedakan perilaku debitur dalam membayar kreditnya.
PEMODELAN ANOMALI GRAVITASI SESAR DENGAN PENDEKATAN MODEL SHEET (MODELLING GRAVITY ANOMALIES OF FAULT BY SHEET MODEL APPROACH) Nurwidyanto, M Irham; Setiawan, Ari
BERKALA FISIKA Vol 14, No 4 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (237.697 KB)

Abstract

AbstractThe modelling gravity anomaly of fault model with a model sheet approach with the aim to study the response of gravity anomalies of faults was done.Modelling is done by modelling approaches bedding with a thickness t and density contrastwith surrounding Δρ. The  gravity anomaly at a point are formulated and  the calculation andvisualization program created in matlab8RS. From the modelling is made it can be concluded that the fault position is generally locatedbetween the gravity anomaly minimum and maximum gravity anomaly. When thetypes of fault arevertical normal fault then the fault position precisely located on the horizontal gradient  maximumvalue, whereas when the fault are not vertical, the location of fault are  to be near (around) themaximum horizontal gradient.Key words: modelling, gravity anomalies, faults, model sheets.
Pemodelan Struktur Bawah Permukaan 3D Purwokerto dan Sekitarnya Berdasarkan Data Anomali Gravitasi Bouguer Lengkap Indrarini Wulandari, Feni; Setiawan, Ari
Jurnal Fisika Indonesia Vol 19, No 57 (2015)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2412.603 KB) | DOI: 10.22146/jfi.27089

Abstract

Zona subduksi di selatan Jawa Timur merupakan bagian dari subduksi panjang yang terbentuk akibat tumbukan lempeng Indo-Australia dan Eurasia. Keberadaan subduksi tersebut menjadi menarik untuk dikaji karena turut mempengaruhi aktivitas gunungapi dan potensi bencana alam di daerah tersebut. Pengkajian zona subduksi dan gunungapi dilakukan dengan melakukan pemodelan struktur bawah permukaan menggunakan anomali gravitasi dengan bantuan program Grablox dan Bloxer. Pemodelan dilakukan terhadap data sekunder anomali regional, dan anomali lokal. Data anomali gravitasi diperoleh dari Bureau Gravimetrique Internationale (BGI). Pembuatan model dilakukan dengan teknik inversi menggunakan metode Singular Value Decomposition (SVD) dan optimasi Occam. Hasil penelitian menunjukkan adanya penipisan kerak samudera rata-rata dari 20 km menjadi 15 km ke arah utara. Penipisan tersebut disebabkan adanya lapisan mantel atas yang menonjol dan mendesak kerak yang disebut flexural bulge. Ketebalan batuan sedimen pada cekungan busur belakang sebesar 4; 50 km, dan semakin ke timur nilainya semakin berkurang. Keberadaan dapur magma pada busur gunungapi di Jawa Timur pada umumnya diperkirakan pada kedalaman 6 km.kata kunci: anomali gravitasi; zona subduksi dan gunung api, Grablox ;Bloxer; pemodelan anomaligravitasi
Pemodelan Struktur Bawah Permukaan Zona Subduksi dan Busur Gunungapi Jawa Timur berdasarkan Analisis Data Gravitasi Ragil Setiawan, Muhammad; Setiawan, Ari
Jurnal Fisika Indonesia Vol 19, No 57 (2015)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1791.641 KB) | DOI: 10.22146/jfi.27092

Abstract

Zona subduksi di selatan Jawa Timur merupakan bagian dari subduksi panjang yang terbentuk akibat tumbukan lempeng Indo-Australia dan Eurasia. Keberadaan subduksi tersebut menjadi menarik untuk dikaji karena turut mempengaruhi aktivitas gunungapi dan potensi bencana alam di daerah tersebut. Pengkajian zona subduksi dan gunungapi dilakukan dengan melakukan pemodelan struktur bawah permukaan menggunakan anomali gravitasi dengan bantuan program Grablox dan Bloxer. Pemodelan dilakukan terhadap data sekunder anomali regional, dan anomali lokal. Data anomali gravitasi diperoleh dari Bureau Gravimetrique Internationale (BGI). Pembuatan model dilakukan dengan teknik inversi menggunakan metode Singular Value Decomposition (SVD) dan optimasi Occam. Hasil penelitian menunjukkan adanya penipisan kerak samudera rata-rata dari 20 km menjadi 15 km ke arah utara. Penipisan tersebut disebabkan adanya lapisan mantel atas yang menonjol dan mendesak kerak yang disebut flexural bulge. Ketebalan batuan sedimen pada cekungan busur belakang sebesar ~ 4,50 km, dan semakin ke timur nilainya semakin berkurang. Keberadaan dapur magma pada busur gunungapi di Jawa Timur pada umumnya diperkirakan pada kedalaman ~6 km.kata kunci: anomali gravitasi; zona subduksi dan gunung api, Grablox ;Bloxer; pemodelan anomali gravitasi
Pengaruh Lokasi dan Kualitas Pelayanan terhadap Keputusan Nasabah untuk Menabung di BMT Sumber Mulia Tuntang Tyas, Rizqa Ramadhaning; Setiawan, Ari
Muqtasid: Jurnal Ekonomi dan Perbankan Syariah Vol 3, No 2 (2012): MUQTASID: Jurnal Ekonomi dan Perbankan Syariah
Publisher : IAIN Salatiga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18326/muqtasid.v3i2.277-297

Abstract

This study discusses the influence of the quality of services consisting ofreliability, responsiveness, assurance, empathy and tangibles as well as thelocation of BMT and variables are the most significant influence on thecustomer’s decision to save in BMT Sumber Mulia. The method used in thisstudy is a quantitative approach, with the amount of the sample was 30respondents. The sampling technique used accidential sampling by applyingis linear regression analysis, which previously conducted validity and reliability. Based on these results, we can conclude. First, there was a significant effect of the quality of service which consists of reliability, responsiveness, assurance, empathy, and tangibles on saving decisions. This is evident from the results of the t test with a value of t count t table at the 5% significance level reliability (3.838 1.7011), responsiveness (2.121 1.7011), assurance (3.062 1.7011), empathy (4.760 1.7011), and tangibles (3.290 1.7011). There is a significant influence on the customer decision to save their money in BMT. Based on it location as the t test results are t count t table (3.480 1.7011), with a significance level of 5%. Third, empathy variables are variables that provide the dominant influence on the customer’s decision to saving. It can be seen from the significance value (0.000) is more significant than other variables. Then proceed with the reliability variables with a significance value (0.001), the variable of location (0,002), tangibles (.003), assurance (0.005) and responsiveness with a significance value (0.043). This means that the willingness of employees and managers are more concerned with to draw customer attention on saving their money 
INVERSI LINIER LEASTSQUARE DENGAN MATLAB ( Studi Kasus Model Gravitasi Bola Berlapis) Nurwidyanto, Irham; Setiawan, Ari
BERKALA FISIKA Vol 14, No 3 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (289.088 KB)

Abstract

The linear  least square Inversion have been made with matlab8 for a case study of layered ball with the aim to study the response of the gravitational field of a layered ball.The gravitational field of layered ball formulation described later the value  is calculated by programming in matlab. As the validation data is computed on the surface of the earth'sgravitational field with a case of six layers with different density and radius. The value aresuitable  to the real slate. After the results are appropriate, the results of  programming was made is used to calculate the gravitation field  of another layered ball object, the data is then used assynthetic data (considered as a data field) which is an inversion of input data on the program aremade.The results obtained in this modeling can be concluded that there are ambiguity from theinversion results, which means that the parameters which be obtained from the invertion methodare  very different to the riil parameter if not given early predictive value as the limit of theexpected value. By providing a limit value (the value of the initial estimate) the expected results ofthe inverse can provide results that correspond (nearly) true value.Key words: Inversion, Linier leastquare, layered ball
Pre and post Mount Merapi eruption of free air anomaly in 2010 Indriana, Rina Dwi; Brotopuspito, Kirbani Sri; Setiawan, Ari; Soenantyo, Tarcisius Aris
International journal of physical sciences and engineering Vol. 2 No. 3: December 2018
Publisher : Universidad Tecnica de Manabi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (987.047 KB) | DOI: 10.29332/ijpse.v2n3.231

Abstract

Mount Merapi eruption in 2010 was one type of eruption with large scale during the last 100 years. Eruptions that was occurred resulting topographic changes in the peak of Mount Merapi, and the possibility of changing the subsurface structure. The research was part of a large study that has been conducted to assess the subsurface changes of pre-and post-eruption of Mount Merapi in 2010. The study discussed observations of free air anomalies pre and after the 2010 eruption. There were grouped into three periods. Processing of air anomalies was free to use using the 2nd orde calculation method. The results obtained were the changes in the contours of the FAA Mount Merapi in 1988, 1998, and 2011 as a result of topographic changes that occurred in the peak area and the alleged dynamics of the surface. The dynamics at Mount Merapi in the 1988 to 2011 period occurred in the northwest, southeast, east, and northeast of the study area and southeast of the peak of Mount Merapi.