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All Journal Jurnal Teknik Industri J@TI (TEKNIK INDUSTRI) REKA INTEGRA Forum Ilmu Sosial Prosiding SNATIF Jurnal Teknologi Pertanian Unnes Civic Education Journal Integritas: Jurnal Antikorupsi Rainbow : Journal of Literature, Linguistics and Cultural Studies
Suprayogi Suprayogi
Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences

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Development of Small Scale Tape Industry through Composting Its Solid Waste Suprayogi, Suprayogi; Hidayat, Nur; Santoso, E.F. Sri Maryani; L., Endah Rahayu; Siswanto, Aris
Jurnal Teknologi Pertanian Vol 9, No 1 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The cassava husk is solid waste of production process of cassava, the cassava husk have big enough potency of amount side. This study aimed to exploit the solid waste of cassava husk become compost, so that can improve economic value of the waste and to know the starter concentration of Aspergillus niger sp and the appropriate time of incubation so that get quality compost of cassava husk, and for the eligibility of small industrial scale cassava husk compostThe process of composting Windrow open system uses starter of Aspergillus niger sp 10, 20 and 30 % with time of incubation during 6, 9, 12, 15, 18, 21, 24, 27, 30 days. Elections of the best treatment pursuant to compost parameter standard show that treatment of K7 that is addition of starter rate 0% with time of incubation 24 days are the best treatment. The best treatment result have rate of C 22.87%, Total N 11.23%, C/N 18.60%, P2O5 0.82%, K2O 0.92%, KA 18.50%, pH 7.05, yield 41.04%, temperature 27 0C and amount of spores 144.543 (x104)/g. From the result analyses eligibility of effort making of competent cassava husk compost to be run calculation of criterion eligibility of effort, mount advantage of investment is competent. Economically asses from waste can mount because can become an valuable product cell.Key words: cassava husk, compost, Aspergillus niger sp
EVALUASI KETEPATAN SASARAN ROKET MENGGUNAKAN METODE POLAR Waskito, Arga Gladi; Nachrowie, Nachrowie; Suprayogi, Suprayogi
Prosiding SNATIF 2017: Prosiding Seminar Nasional Teknologi dan informatika (BUKU 1)
Publisher : Prosiding SNATIF

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Abstrak Pada saat ini pengembangan roket sudah mulai pesat dan banyak negara–negara yang mengembangkan teknologi roket namun kebanyakan masih belum memperhatikan faktor perkenaan pada roket. Dalam tugas akhir ini akan dibahas mengenai pengujian ketepatan sasaran roket menggunakan metode polar. Pengujian ini berfungsi untuk mendeteksi dan menguji ketepatan roket menggunakan GPS/GPRS/GSM Module V3.0 dan diproses oleh Mikrokontroler Arduino Uno R3, lalu dikirim menggunakan modul GSM/GPRS SIMCOM SIM908 kemudian dikirim ke HP via sms (Short Message Service). Tanpa GPS tidak akan tahu dimana titik perkenaan roket yang telah diluncurkan, kemudian data yang diperoleh akan dianalisa menggunakan metode polar dengan parameter jarak dan eror, sehingga dari data yang diperoleh dapat diketahui data yang akurat dan digunakan untuk menganalisa perkenaan sebuah roket.  Kata kunci: GPS, Polar, Roket, SMS
ESTIMASI JARAK DAN KECEPATAN PADA ALAT UJI STATIS ROKET LATIH EXPERIMENT DENGAN PEDEKATAN GAYA DORONG OPTIMAL Hurmuzi, Erik Roma; Prasetya, Dwi Arman; Suprayogi, Suprayogi
Prosiding SNATIF 2017: Prosiding Seminar Nasional Teknologi dan informatika (BUKU 1)
Publisher : Prosiding SNATIF

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AbstrakDalam proses pengujian kerja roket, salah satu cara dapat dilakukan dengan uji statis roket. Istilah “uji statis” mengandung pengertian pengujian dalam keadaan statis/diam. Hasil yang didapat dari proses pengujian tersebut salah satunya adalah gaya dorong roket (thrust). Sehingga perlu dirancang sebuah alat ukur tekanan gaya dorong (thrust) dengan menggunakan sensor loadcell yang kemudian ditampilkan ke laptop berupa data grafik dan tabel yang dapat dilihat secara realtime,sehingga bisa dihitung estimasi atau perkiraan jarak dan kecepatan roket menggunakan metode pedekatan gaya dorong optimal, kemudian data tersebut disimpan didalam database menggunakan microsoft access dan juga tersimpang pada micro SD agar memudahkan dalam fleksibilitas pemindahan data ke perangkat lain Kata kunci: sensor loadcell, thrust, uji statis
PEMBINAAN NILAI TOLERANSI BERAGAMA DI PONDOK PESANTREN ANNURIYYAH SOKO TUNGGAL SEMARANG Jamaluddin, Eko Wahyu; Suprayogi, Suprayogi; Munandar, Aris
Unnes Civic Education Journal Vol 1 No 1 (2015)
Publisher : Civic Education Program, Universitas Negeri Semarang

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SokoTunggal Islamic Boarding School Semarang has a very important role as a place to nurture religious tolerance for its students. The need for religious tolerance education is urgent because various conflicts in Indonesia are sourced from inter-religious issues. Religious tolerance education in Soko Sole Boarding School aims at nurturing mental and morals of the students in order to become a person with ahlakul karimah showed by tolerance to differences in people’s lives, especially religious differences. The results suggest the pesantren sucesfully conducts such program because the background of the Kyai , who is very tolerant, and the vision, mission and purpose of boarding school to teach the value of tolerance. Religious tolerance value is fostered through the habituation of students in interaction with people of other religions, the example of Kyai, and through learning, especially the books of morals. The factors that asupport the development of tolerance in the boarding school include: the competence of management, and the high motivation of the students. While inhibiting factor is the caretaker and students who also have other jobs so they are not always able to follow the activities of the boarding school and the damage of some infrastructure.
PELAKSANAAN PERJANJIAN BAGI HASIL DI DESA KALIGLAGAH KECAMATAN LOANO KABUPATEN PURWOREJO Kumalasari, Sulistyawati; Sigalingging, Hamonang; Suprayogi, Suprayogi
Unnes Civic Education Journal Vol 1 No 1 (2015)
Publisher : Civic Education Program, Universitas Negeri Semarang

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Community Kaliglagah use customary law on sharing agreements, a tradition that have been passed down through generations. This study aims at knowing the implementation of the agreements. The research method used was qualitative research methods. The research indicates that the implementation of agreements on production sharing agreements for the Village Kaliglagah is only based on an agreement between the owners of fields and tenants, a verbal agreement in nature, based on trust, without witnesses, and not done in the presence of the authority. The people use “maro” system for rice grown in paddy fields and “mertelu” for rice grown in non-paddy fields. Production costs for the system “maro” such as seed, fertilizer, and harvest wage rates are shared. Other costs are borne by farmers themselves. For mertelu system, the cost of production are borne by farmers except the expenses for fertilizer costs are shared harvest labor wages. Term of the agreement is not clear and unequivocal.
Teknik Relaksasi Lagrange untuk Penjadwalan Pekerjaan Majemuk dengan Penggunaan Sumberdaya Simultan Suprayogi, Suprayogi; Valentine, Valentine
Jurnal Teknik Industri Vol 17, No 2 (2015): DECEMBER 2015
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (425.416 KB) | DOI: 10.9744/jti.17.2.71-80

Abstract

This paper discusses the multiple jobs scheduling problem with simultaneous resources. The problem involves one or more jobs with each job consist of a set of operations. Each operation is performed by more than one resource simultaneously. Number of units of each resource used for performing an operation is one or more units. The problem deals with determining a schedule of operations minimizing total weighted tardiness. In this paper, solution techniques based on Lagrangian relaxation are proposed. In general, the Lagrangian relaxation technique consists of three parts run iteratively, i.e., (1) solving individual job problems, (2) obtaining a feasible solution, and (3) solving a Lagrangian dual problem. For solving the individual job problems, two approaches are applied, i.e., enumeration and dynamic program¬ming. In this paper, the Lagrangian relaxation technique using the enumeration and dynamic programming approaches are called RL1 and RL2, respectively. The solution techniques proposed are examined using a set of hypothetical instances. Numerical experiments are carried out to compare the performance of RL1, RL2, and two others solution techniques (optimal and genetic algorithm techniques). Numerical experiments show that RL2 is more efficient than RL1. In terms of the solution quality, it is shown that RL2 gives same results compared to the optimal technique and genetic algorithm. However, both RL2 and genetic algorithm can handle larger problems efficiently.
Tabu Search for the Vehicle Routing Problem with Multiple Trips, Time Windows, and Simultaneous Delivery-Pickup Suprayogi, Suprayogi; Priyandari, Yusuf
Jurnal Teknik Industri Vol 19, No 2 (2017): Desember 2017
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (330.633 KB) | DOI: 10.9744/jti.19.2.75-82

Abstract

This paper discusses a vehicle routing problem with multiple trips, time windows, and simultaneous delivery-pickup (VRPMTTWSDP). This problem is a variant of the basic vehicle routing problem (VRP) including the following characteristics: multiple trips, time windows, and simultaneous delivery-pickup.  In this paper, a solution approach based on tabu search (TS) is proposed. In the proposed TS, the sequential insertion (SI) algorithm is used to construct an initial solution. A neighbor structure is generated by applying an operator order consisting of eleven operators of relocation, exchange, and crossover operators. A tabu solution code (TSC) method is applied as a tabu restriction mechanism. Computational experiments are carried out to examine the performance of the proposed TS using hypothetical instances. The performance of the proposed TS is compared to the local search (LS) and the genetic algorithm (GA). The comparison shows that the proposed TS is better in terms of the objective function value.
MODEL PENJADWALAN BATCH PADA SATU MESIN YANG MENGALAMI DETERIORASI UNTUK MINIMASI TOTAL BIAYA SIMPAN DAN BIAYA KUALITAS S. Indrapriyatna, Ahmad; Suprayogi, Suprayogi; P. Iskandar, Bermawi; Halim, A. Hakim
Jurnal Teknik Industri Vol 10, No 1 (2008): JUNE 2008
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (209.043 KB) | DOI: 10.9744/jti.10.1.pp. 26-37

Abstract

This research discusses batch scheduling model accommodating the condition of machine deterioration. The proposed model has changed the formulation of quality cost from that discussed in Indrapriyatna et al. (2007a), especially in the internal and external failure costs. It is assumed that the distribution of time between out-of-control conditions follows the exponential distribution. An algorithm has been proposed. This research concludes that, for continue batch size, the greater the sample size proportion of the batch size, the greater the total cost and number of batches. In addition, the greater the probability of producing nonconforming products, the greater the total cost. For any values of the probability, the number of batches will be the same, but the batch sizes are different. On the other hand, for model with discrete batch sizes, we used Indrapriyatna et al. (2007b) approach to solve the problem. Abstract in Bahasa Indonesia: Penelitian ini membahas model penjadwalan batch yang mengakomodasikan kondisi mesin terdeteriorasi, yang akan menyebabkan produk menjadi nonconforming. Pengembangan ini mengubah formulasi biaya kualitas yang telah dirumuskan pada model Indrapriyatna et al. (2007a), khususnya untuk Biaya Kegagalan Internal dan Biaya Kegagalan Eksternal. Dalam model usulan, waktu antar kondisi out-of-control diasumsikan berdistribusi eksponensial. Sebuah algoritma penyelesaian dirancang untuk model usulan tersebut. Studi ini menunjukkan bahwa, untuk model dengan ukuran batch kontinu, semakin besar proporsi ukuran sampel menyebabkan biaya total dan jumlah batch yang semakin besar. Selain itu, semakin besar peluang produk nonconforming dihasilkan maka akan menyebabkan semakin besar total biaya. Observasi lain menunjukkan bahwa jumlah batch selalu sama untuk sebarang nilai peluang; walaupun ukuran masing-masing batch berbeda. Pada model dengan ukuran batch diskrit digunakan 3 buah metode untuk mengubah ukuran batch menjadi integer yang diusulkan oleh Indrapriyatna et al. (2007b) dan menghasilkan kesimpulan yang sama. Kata kunci: mesin terdeteriorasi, produk nonconforming, ukuran batch kontinu, ukuran batch diskrit.
INTEGRASI KEBIJAKAN PERSEDIAAN-TRANSPORTASI (PENGIRIMAN LANGSUNG DAN BERBAGI) DI SISTEM RANTAI PASOK 4-ESELON Santoso, Amelia; Bahagia, Senator Nur; Suprayogi, Suprayogi; Sasongko, Dwiwahju
Jurnal Teknik Industri Vol 11, No 1 (2009): JUNE 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (251.806 KB) | DOI: 10.9744/jti.11.1.pp. 15-32

Abstract

Coordination among manufacturers, distributors and retailers is a key of success in supply chain management. Moreover, coordination is also needed in distributing product (managing inventory and transportation) from an echelon to its successive echelons. The transportation policy and inventory policy affect each others so the inventory and transportation policy should be integrated. This paper develops model of integrated inventory-transportation policies in 4-echelons supply chain systems that consist of a manufacturer, a distribution center, distributors and retailers. This model considers continuous production process as well as time-dependent demand. We consider direct and sharing shipping at distributor when we only consider direct shipping at manufacturer and distribution center. The production policy at the manufacturer, replenishment policies at the distribution center, distributors and retailers, and transportation policies at the manufacturer, distribution center and distributors will be determined in order to minimize system cost. The system cost consists of total costs at the manufacturer, distribution centers, distributors and retailers. Due to the model is classified as NP-hard model, the model is solved using genetic algorithm. From the result of genetic algorithm, the total system cost if the distributors who use sharing shipping as well as direct shipping, is lower stasitiscally than the distributors who only use direct shipping for delivering produk to their retailers. Abstract in Bahasa Indonesia: Koordinasi antar pabrik, distributor dan pengecer merupakan kunci keberhasilan dalam sistem rantai pasok. Koordinasi diperlukan saat pendistribusian produk (pengaturan persediaan dan transportasi) dari satu eselon ke eselon di bawahnya. Kebijakan transportasi mempengaruhi kebijakan persediaan dan sebaliknya oleh karena itu kedua kebijakan tersebut seharusnya ditetapkan secara terintegrasi. Paper ini mengembangkan model integrasi kebijakan persediaan-transportasi di sistem rantai pasok 4-eselon yang terdiri dari sebuah pabrik dengan proses produksi kontinu, sebuah gudang penyangga, multi distributor dan multi pengecer. Model ini mempertimbangkan permintaan yang bergantung pada waktu, pengiriman langsung di pabrik dan gudang penyangga serta pengiriman langsung dan berbagi di distributor. Paper ini menetapkan kebijakan produksi di pabrik, kebijakan pemesanan di gudang penyangga, distributor dan pengecer serta kebijakan transportasi di pabrik, gudang penyangga dan distributor untuk meminimumkan ongkos sistem. Ongkos sistem terdiri atas ongkos total di pabrik, gudang penyangga, distributor dan pengecer. Model yang dikembangkan termasuk dalam kategori NP-hard sehingga dikembangkan metode solusi yang berbasis pada algoritma genetika. Kesimpulan yang diperoleh dari hasil algoritma genetika menyatakan bahwa ongkos total sistem lebih kecil secara statistik jika pengiriman langsung dan berbagi dipergunakan di distributor dibandingkan hanya menggunakan pengiriman langsung. Kata kunci: integrasi, kebijakan persediaan, kebijakan transportasi, multi eselon
PENENTUAN RUTE TRUK PENGUMPULAN DAN PENGANGKUTAN SAMPAH DI BANDUNG Fitria, Lisye; Susanty, Susy; Suprayogi, Suprayogi
Jurnal Teknik Industri Vol 11, No 1 (2009): JUNE 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (92.146 KB) | DOI: 10.9744/jti.11.1.pp. 51-60

Abstract

The garbage collection constitutes the main contributor in terms of the garbage cost management. Garbage collection scheduling model is a variable that determine cost center. Regarding to the existing condition, scheduling model could be designed concerning to the constraints, such as: amount of vehicles, transportation time, and transport system. This research develops a Vehicle Routing Problem (VRP) model for determining the optimal route in garbage gathering collection. The VRP model utilizes intermediate facility. This model is called the Vehicle Routing Problem with Multiple Trips and Intermediate Facility (VRPMTIF). The VRPMTIF is solved by using a Sequential Insertion Algorithm. The algorithm applied to the determine garbage collections routes in Bandung with result as follows: 28 vehicles for West Bandung, 41 vehicles for Central Bandung, and 68 vehicles for East Bandung where there are different accomplishment time for each scenario. Abstract in Bahasa Indonesia: Proses pengumpulan sampah merupakan kontributor terbesar dalam biaya pengelolaan sampah. Rute pengumpulan sampah adalah faktor penentu biaya pengelolaan sampah. Rute pengumpulan sampah dapat dibuat dengan memperhatikan keterbatasan yang ada seperti: jumlah kendaraan, waktu angkut dan sistem pengangkutan yang dilakukan. Penelitian ini bertujuan untuk menentukan rute pengumpulan dan pengangkutan sampah. Kondisi pengumpulan sampah dapat dianalogikan dengan model Vehicle Routing Problem dengan menambahkan intermediate facility pada akhir rute, yakni tempat pembuangan sampah akhir. Model ini disebut Vehicle Routing Problem with Multiple Trips and Intermediate Facility (VRPMTIF). Penentuan rute pengumpulan sampah VRPMTIF diselesaikan dengan menggunakan algoritma sequential insertion. Algoritma tersebut diterapkan pada penentuan rute pengumpulan sampah di Kota Bandung dengan hasil sebagai berikut: 28 tur untuk Bandung Barat, 41 tur untuk Bandung Tengah, dan 68 tur untuk Bandung Timur dengan waktu penyelesaian yang berbeda untuk setiap skenario. Kata kunci: Vehicle Routing Problem, multiple trips, intermediate facility, algoritma sequential insertion
Co-Authors A. Hakim Halim Ahmad S. Indrapriyatna Amelia Santoso Aris Munandar Aris Siswanto Avisenna, Hikmat Bermawi P. Iskandar Dian Puspita Dwi Arman Prasetya Dwi Indriastuti, Dwi Dwiwahju Sasongko E.F. Sri Maryani Santoso Eko Wahyu Jamaluddin, Eko Wahyu Endah Rahayu L. Ferdinand, Julius Firdausyi, Izzati Ardhan Hamonang Sigalingging, Hamonang Hery Ramdhani, Hery Hurmuzi, Erik Roma Ibnu Syabri Isdaryanto, Noorochmat Ismail, Khosid Mahendra Lestari, Eta Yuni Lisye Fitria Mochamad Verza, Mochamad Muhammad Syamsul Hadi, Muhammad Syamsul Nachrowie, Nachrowie Nimas Mayang sabrina, Nimas Mayang Nur Bahagia, Senator Nur Hidayat Nurdiansyah, Isnan One, Ferdyandika Putra Aprilia Paillin, Daniel Bunga Saragih, Nova Senator Nur Bahagia Sulistyawati Kumalasari, Sulistyawati Susy Susanty Thaddeus, Yudi Toha, Muhamad Valentine Valentine, Valentine Waskito, Arga Gladi Winda, Syahdu Yusuf Priyandari