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All Journal MATEMATIKA SAINS DAN MATEMATIKA Unisda Journal of Mathematics and Computer Science (UJMC) Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Journal of Soft Computing Exploration Journal of Fundamental Mathematics and Applications (JFMA) Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya
Bambang Irawanto
Departemen Matematika, Fakultas Sains Dan Matematika Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Mathematics

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DETEKSI DAN KOREKSI ERROR PADA PESAN DIGITAL DENGAN KODE HAMMING Irawanto, Bambang; Widyaningsih, Santi
JURNAL SAINS DAN MATEMATIKA Volume 17 Issue 3 Year 2009
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

ABSTRACT--At digital message delivery process in the form of code may will experience of trouble in couse of  its transmission so that generate the error of accepted message. Hamming Code (n,k,d) is one of method that coald detect error and correct error that happened at one blow. Coding process  of message by Hamming  Code (n,k,d) can be done by multiply of message word delivered with the generator matrix G. Then for the Coding process of codewords accepted can be done with method of vector error, the method started by determined the syndrome, and continued with the error detrection process and also error correetion process. The final step is read the codeword by multiply  codeword accepted with parity check matrix H toget the message such as those which transmissionfrom the beginning. Keyword:  Hamming Code (n,k,d), generator matrix, the parity check matrix, syndrome, error correcting code
PENDEKATAN VALUE BILANGAN TRAPEZOIDAL FUZZY DALAM METODE MAGNITUDE Aulia, Lathifatul; Irawanto, Bambang; Surarso, Bayu
MATEMATIKA Vol 20, No 2 (2017): JURNAL MATEMATIKA
Publisher : MATEMATIKA

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Abstract

Defuzzification is the process to transform fuzzy numbers into real numbers (crisp). There are some defuzzification methods which can be used to confirm the fuzzy numbers. However, different defuzzification methods produce different real numbers (crisp) too. In this paper, we discuss about Magnitude method, that is an approachment method which can be used in the defuzzification of trapezoidal fuzzy numbers. The defuzzification method  in the calculation considers average between the value of trapezoidal fuzzy numbers and the middle point of two defuzzifier trapezoidal fuzzy numbers
PENDAMPINGAN INVENTORY PRODUKSI KOPI DAN PEMANFAATAN LIMBAH KOPI SEBAGAI PENDUKUNG PROGRAM REDUCE FOR ENVIRONMENT Solikhin Solikhin; Bambang Irawanto; Sunarsih Sunarsih; Suryoto Suryoto
Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Vol 4, No 2 (2022)
Publisher : Fakultas Teknik Universitas Diponegoro

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Abstract

Desa Kebondowo Kecamatan Banyubiru Kabupaten Semarang merupakan desa yang mempunyai potensi lokal yang sangat menarik, salah satunya adalah kopi. Salah satu produk olahan kopi yang ada adalah Kopi Pinanggih. Kopi Pinanggih memiliki aroma yang khas dibandingkan kopi-kopi lainnya, yaitu beraroma gula aren. Kopi ini dijadikan sebagai produk unggulan desa oleh masyarakat setempat. Di Tengah pandemi Covid-19 ini, permasalahan yang dihadapi oleh Kopi Pinanggih adalah masalah pemasaran produk olahan kopi dan limbah sisa hasil produksi kopi, yaitu kulit kopi dan hasil sortir. Produksi kopi yang terlalu besar akan memberatkan beban operasional dan menurunkan kualitas kopi, sedangkan produksi kopi yang terlalu kecil juga akan menurunkan atau akan kehilangan konsumen. Oleh karena itu, manajemen inventory-pengendalian stock maupun produksi kopi perlu diterapkan untuk Analisa usaha Kopi Pinanggih dan pemanfaatan limbah kopi menjadi barang atau produk bernilai jual. Kegiatan ini bertujuan untuk mengoptimalkan produksi kopi melalui manajemen inventory dengan tetap mempertimbangkan pada permintaan konsumen akan kopi dan biaya operasional. Selain itu, pemanfaatan limbah kopi sebagai parfum essen kopi. Metode yang diterapkan adalah pelatihan manajemen inventory dan demo pembuatan parfum essen kopi. Hasil yang diperoleh adalah wawasan pengetahuan manajemen inventory dan produk parfum essen kopi.Kata kunci : Kopi Pinanggih, Inventory, Parfum Essen Kopi
JEMBATAN PADA GRAF FUZZY INTUITIONISTIC Siti Alfiatur Rohmaniah; Bayu Surarso; Bambang Irawanto
Unisda Journal of Mathematics and Computer Science (UJMC) Vol 1 No 01 (2015): Unisda Journal of Mathematics and Computer Science
Publisher : Mathematics Department of Mathematics and Natural Sciences Unisda Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1462.553 KB) | DOI: 10.52166/ujmc.v1i01.438

Abstract

An intuitionistic fuzzy graph consist of a couples of node sets V and set of edges E which the sum of degree membership and degree non membership each of nodes and each of edges in closed interval [0,1], the degree membership each of edges is less than or equal with the minimum of degree membership each of related nodes, and degree non membership each of edges is less than or equal with the maximum degree non membership each of related nodes. An intuitionistic fuzzy graph H can be said as intuitionistic fuzzy subgraph from intuitionistic fuzzy graph G if node set V of H is subset of node set V of G and edge set E of H is subset of edge set E of G. If there is an intuitionistic fuzzy graph G with nodes set of V and if each of edge has degree membership and non membership unconstantly, then G has at least one bridge. The theorem is proven to hold if the intuitionistic fuzzy graph has cycle.
PELABELAN TOTAL SUPER TRIMAGIC SISI PADA BEBERAPA GRAF Robertus Heri Utomo; Heru Tjahjana; Bambang Irawanto; Lucia Ratnasari
Journal of Fundamental Mathematics and Applications (JFMA) Vol 1, No 1 (2018)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (981.812 KB) | DOI: 10.14710/jfma.v1i1.4

Abstract

This paper is addressed to discuss the edge super trimagic total labeling on some graphs which are corona, double ladder, quadrilateral snake and alternate triangular snake. The main results are the edge super trimagic total label for these graphs. Furthermore, it was prove that corona is a graph with edge super trimagic total labeling, a double ladder with odd ladder is graph with edge super trimagic total labeling, quadrilateral snake is a graph with edge super trimagic total labeling and finally an alternate triangular snake with odd ladder is graph with edge super trimagic total labeling.
The forecasting of palm oil based on fuzzy time series-two factor Wulandari, Ratri; Surarso, Bayu; Irawanto, Bambang; Farikhin, Farikhin
Journal of Soft Computing Exploration Vol. 2 No. 1 (2021): March 2021
Publisher : SHM Publisher

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Abstract

Palm oil is a vegetable oil obtained from the mesocarp fruit of the palm tree, generally, from the species, Elaeis guineensis, and slightly from the species Elaeis oleifera and Attalea maripa. Palm oil is naturally red due to its high alpha and beta-carotenoid content. Palm kernel oil is different from palm kernel oil produced from the same fruit core. Planning for palm oil production is necessary because it greatly affects to the level of the country’s economy. Forecasting can reduce uncertainty in planning. Forecasting used in the palm oil problem is two-factor forecasting using the Kumar method with uama factors in the form of palm oil production and supporting factors in the form of land area. The forecasting is evaluated using AFER and MSE, from the acquisition of AFER value of 1.212% <10%, then the forecasting has very good criteria.
Pendekatan Momen untuk Metode Magnitude pada Bilangan Trapezoidal Fuzzy Aulia, Lathifatul; Irawanto, Bambang; Surarso, Bayu
Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya 2018: Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Teori himpunan fuzzy banyak diterapkan dalam berbagai disiplin ilmu. Para ahli telah banyak yang mengusulkan beberapa pendekatan untuk memecahkan masalah yang menggunakan himpunan bilangan fuzzy. Hal utama yang perlu dilakukan dalam menyelesaikan suatu permasalahan yang menggunakan bilangan fuzzy yaitu defuzzifikasi. Defuzzifikasi merupakan proses mentransformasikan bilangan fuzzy menjadi bilangan riil tegas atau disebut dengan penegasan bilangan fuzzy. Ada beberapa metode yang dapat digunakan untuk menegaskan suatu bilangan fuzzy. Setiap metode penegasan bilangan fuzzy yang berbeda akan menghasilkan bilangan tegas (crisp) yang berbeda pula. Pada tulisan ini, dibahas metode Magnitude yaitu merupakan metode pendekatan yang ditunjukkan dengan perhitungan momen daerah rata-rata yang mempertimbangkan fungsi keanggotaan bilangan fuzzy, penyebaran fungsi kenggotaan kanan, dan fungsi keanggotaan kiri pada beberapa potongan –
Co-Authors A, Nunung Amalia Alifiani, Amalia Ambar Puspasari, Ambar Aulia, Lathifatul Aurora Nur Aini Bambang Supriyadi Bayu Surarso Desfri Kurniawan Djuwandi Djuwandi Eddy Prianto Handayani, Rizky Ikhsan Rizki K. Jiwangga, Sesar Sukma Juwanda, Farikhin Lucia Ratnasari Lucia Ratnasari Mohammad Ervan S, Mohammad Ervan Mohammad Ervan S., Mohammad Ervan Nanda Puspitasari, Nanda Nikken Prima Puspita Ratri Wulandari Redemtus Heru Tjahjana rizki, ikhsan Robertus Heri Sulistyo Utomo Santi Widyaningsih Shintia Devi Wahyudy, Shintia Devi Siti Alfiatur Rohmaniah Solikhin Solikhin Sulastri Daruni Sunarsih . Sunarsih Sunarsih Suryoto ., Suryoto Suryoto Suryoto Utomo, R. Heri Soelistyo Utomo, R. Heri Soelistyo Widowati ., Widowati Yuni Hidayati