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All Journal Pythagoras: Jurnal Matematika dan Pendidikan Matematika Jurnal Pendidikan Matematika Jurnal Edukasi Universitas Jember KADIKMA Saintifika Prosiding Seminar Matematika dan Pendidikan Matematik JINOP (Jurnal Inovasi Pembelajaran) EDU-MAT: Jurnal Pendidikan Matematika Journal of Research and Advances in Mathematics Education Limits: Journal of Mathematics and Its Applications EDUPEDIA Al-Khwarizmi: Jurnal Pendidikan Matematika dan Ilmu Pengetahuan Alam Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika Jurnal Pengabdian Masyarakat Khatulistiwa JURNAL BIOSHELL CGANT JOURNAL OF MATHEMATICS AND APPLICATIONS Pancaran Pendidikan Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya SAINTIFIKA Jurnal Ilmiah NOSI Journal of Digital Literacy and Volunteering
Arif Fatahillah
Universitas Jember
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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PENYEBARAN ALIRAN PANAS PADA OVEN SURYA (3 DIMENSI) Fatahillah, Arif
KadikmA Vol 4, No 1 (2013): April 2013
Publisher : KadikmA

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Abstract. Era industrialisasi yang berkembang sangat cepat membutuhkan sumber daya energi yang cukup besar, dimana sebagian besar sumber daya energi tersebut semakin berkurang dari waktu ke waktu. Untuk itu dibutuhkan suatu sumber daya energi alternatif yang diharapkan bisa menggantikan sumber daya utama yang semakin berkurang tersebut. Salah satu energi alternatif untuk pemanasan ataupun pembakaran adalah menggunakan oven berbantuan surya yang berguna tetapi memiilki dampak yang ramah terhadap lingkungan. Dari penelitian yang sudah dilakukan dengan menggunakan metode volume hingga dan diselesaikan dengan teknik diskritisasi QUICK maka didapatkan bahwa energi surya dapat dimanfaatkan dengan maksimal jika oven berbentuk kubus dan diberi sekat-sekat, hal ini juga berpengaruh terhadap temperatur awal yang masuk, semakin besar energi surya yang terserap maka proses pemanasan akan berlangsung dengan baik. Sedangkan penyebaran temperatur cukup merata dengan temperatur tertinggi pada oven surya berbentuk kubus adalah terletak pada tengah kubus. Key Words :Modelling, Oven Surya, Finite Volume Method
ANALISIS MODEL MATEMATIKA PERTUKARAN PANAS PADA FLUIDA DI HEAT EXCHANGER TIPE SHELL AND TUBE YANG DIGUNAKAN DI PT. PUPUK KALTIM TBK. Qoriatul, Q; Fatahillah, Arif; Dafik, D; Sri Lestari, Nurcholif Diah
KadikmA Vol 4, No 1 (2013): April 2013
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Abstract. Materials to produce fertilizer are NH3 Liquid and CO2 gas. Required CO2 gas should be free from condensation, so CO2 gas is refrigerated in intercooler. In this research, we analyse of mathematic model for heat transfer in fluid with finite volume method. We will review how the CO2 gas cooling process from mathematics model point of view. We will model the equations for CO2 gas cooling process which includes momentum dan energy. After that this model will be discretizatied. For numerical solution, we will use Matlab and Fluent to simulate CO2 gas cooling process. The simulation result using Matlab and Fluent forms will be presented descriptively in charts, tables, and images to show how the distribution process of heat transfer. The result show for error is 0,0087. In conclusion the model accurate for solving heat transfer process in CO2 gas. Key Words : Mathematics Models, Heat transfer, Finite Volume Methode,
ANALISIS MODEL MATEMATIKA PENYEBARAN ASAP PADA KEBAKARAN RUMAH Rahman, Mohammad Fadli; Fatahillah, Arif; Dafik, D; Kristiana, Arika Indah
KadikmA Vol 5, No 1: April 2014
Publisher : KadikmA

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Abstract. The house fire will produce smoke and hot gas. When we are trapped inside the house fire, we need a secured evacuation path to escape. In this research talk about mathematical model analysis on the spread of house fire by using a finite volume method. Researcher will study the simulation of smoke and hot gas by utilising a mathematical model. We will also model the spread of hot smoke equations based on momentum and energy models. We used Matlab to analyse the spread of smoke and hot gas and use Fluent software to have a graphic animation. The result of simulation with Matlab and Fluent are chart, tables, and images spread of smoke and hot gas. The result shows that te spread of the smoke and hot gas depends on the epicentrum of fire. Key Words: finite volume method, house fire, mathematical model
ANALISIS ALIRAN UDARA PADA JEMBATAN SURAMADU DENGAN MENGGUNAKAN METODE VOLUME HINGGA Aprianto, Dody Dwi; Fatahillah, Arif; Setiawani, Susi
KadikmA Vol 5, No 3: Desember 2014
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Abstract.This study was aimed to determine the air flow on the Suramadu bridge during extreme conditions. Computational Fluid Dynamics (CFD) is the science study of the flow fluida where air flow is one of them. The wind velocity data that will be examined in this study derived from the previous research. The other data, namely density, viscosity, gravity and pressure obtained from Wikipedia etc. The results of this study in the form of the mathematical model for air flow in the Suramadu bridge obtained using the vinite volume methods. The model was discretized by using upwind Quadratic Interpolation Convective Kinematics (QUICK) to obtain a matrix of size n x n that will be solved by using iterative cojugate gradient methods using MATLAB and Fluent programs. The resulth show that air velocity of Suramadu bridge is extreamly high. It dengerous for any vehicles through the bridge. Key Words: Mathematical Models, Finite Volume Methode, Computational Fluid Dynamics (CFD), Fluent, MATLAB, Discretization.
ANALISIS NUMERIK PROFIL SEDIMENTASI PASIR PADA PERTEMUAN DUA SUNGAI BERBANTUAN SOFTWARE FLUENT Fatahillah, Arif
KadikmA Vol 5, No 3: Desember 2014
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Abstract.Sand is one material that is very useful for human life that is often used to build a house that will be used as a human habitation. But not all areas of the river containing sand stored below the surface of the water, it depends on various factors such as the speed of the river flow, pressure, and position of the area of the river (curves, straight or it could be a meeting between the two rivers). In this study constructed a model of the shape of sand sedimentation analysis of the problems and solve the problem by using the volume up (finite volume method). The model is constructed based on the pressure and flow rate of the river, which is expected to know about the profile picture of sand sedimentation on a wide range of pressure and flow velocity pattern of the river. Based on the results of the simulation it was concluded that if both channels of the river has a flow rate of pressure and speed the same then the area of sand sedimentation areas potentially occur before the second meeting of the river, whereas if it has a level of pressure and velocity will be different after the confluence area with ideal conditions ie pressure and velocity of the river branch is higher than the main river. Keywords :Sedimentation, Finite Volume Method
Analisa Himpunan Dominasi pada Graf-Graf Khusus Alfarisi, Ridho; Dafik, Dafik; Fatahillah, Arif
Prosiding Seminar Matematika dan Pendidikan Matematik Vol 1, No 1 (2014): Prosiding Seminar Nasional Matematika 2014
Publisher : Prosiding Seminar Matematika dan Pendidikan Matematik

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The advance of science and technology increases proportionally to the development of era. Today era tends to the raise to the advance of ICT. One research interest which supports the ICT development is a graph theory. A dominating set theory is one of a graph theory which has a wide range of applications mainly in communication network and space syntax theory. A set $D$ of vertices of a simple graph $G$, that is a graph without loops and multiple edges, is called a dominating set if every vertex $uin V(G)-D$ is adjacent to some vertex $vin D$. The domination number of a graph $G$, denoted by $gamma_{k}{G}$; $kin{{1,2}}$, is the order of a smallest dominating set of $G$. This research aims to find the domination number of some families of special graphs, disc brake graph $Db_{n,m}$, lampion graph $pounds_{n,m}$, prism graph $D_{n,m}$, and staked ladder graph $Dt_{n,m}$.
The Air Flow Analysis of Coffee Plantation Based on the Initial Velocity of Air and Crops Planting Pattern of the Triangular Grid Graphs by Using Finite Volume Method Rizal, Ahmad Syaiful; Dafik, Dafik; Fatahillah, Arif
Prosiding Seminar Matematika dan Pendidikan Matematik Vol 1, No 1 (2014): Prosiding Seminar Nasional Matematika 2014
Publisher : Prosiding Seminar Matematika dan Pendidikan Matematik

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Tanaman Kopi adalah salah satu komoditi ekspor utama Indonesia. Berdasarkan data dari tahun 2013, Indonesia menempati peringkat empat besar sebagai pengekspor biji kopi di dunia setelah Columbia, Vietnam, dan Brasil. Perluasan lahan tanaman kopi telah dilakukan untuk  meningkatkan produktifitas biji kopi, namun masih belum efektif. Salah satu faktor yang mempengaruhi produktifitas biji kopi adalah pola tanam. Pola tanam yang baik akan mengakibatkan sirkulasi udara yang baik dan akhirnya mempengaruhi produktifitas biji kopi. Kami akan menggunakan metode volume hingga untuk menganalisis aliran udara dari penanaman kopi berdasarkan kecepatan awal udara dan pola tanam graf tangga segitiga. Proses simulasi dilakukan menggunakan software MATLAB dan FLUENT. Hasil analisis menunjukan bahwa pola tanam graf tangga segitiga mengakibatkan proses sirkulasi udara yang lebih baik pada penanaman kopi.
Analisis Sirkulasi Udara Berdasarkan Kecepatan Awal Udara Pada Tanaman Pelindung Kopi Dan Pola Tanam Graf Tangga Permata Dengan Metode Volume Hingga Trisnani, Didin; Dafik, Dafik; Fatahillah, Arif
Prosiding Seminar Matematika dan Pendidikan Matematik Vol 1, No 1 (2014): Prosiding Seminar Nasional Matematika 2014
Publisher : Prosiding Seminar Matematika dan Pendidikan Matematik

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Kopi adalah minuman yang popular di Indonesia. Kopi merupakan salah satu komoditas unggulan dalam subsektor perkebunan di Indonesia karena memiliki peluang pasar yang baik di dalam negeri maupun luar negeri. Namun demikian ditinjau dari tingkat produktivitas dan mutu hasil belum seperti yang diharapkan, ada banyak hal yang mempengaruhi penurunan produksi kopi. Salah satu diantaranya ialah pola tanam dari tanaman kopi dan sirkulasi udaranya.  Dalam penelitian ini, kami menganalisis sirkulasi udara dan  mensimulasikannya untuk menemukan solusi dari  permasalahan sirkulasi udara pada tanaman kopi dan pola tanamnya. Simulasi didesain berdasarkan pada kecapatan awal udara,dan graf tangga permata dengan menggunakan metode volume hingga. Hasil penelitian ini merupakan model matematika dari sirkulasi udara pada tanaman kopi berdasarkan kecepatan awal udara tanaman pelindung dan pola tanam graf tangga permata. Model diaplikasikan dengan metode volume hingga
ANALISIS SIRKULASI UDARA PADA TANAMAN KOPI BERDASARKAN TINGKAT KEKASARAN TUMBUHAN DAN POLA TANAM GRAF TANGGA PERMATA MENGGUNAKAN METODE VOLUME HINGGA Riastutik, Ervin Eka; Dafik, D; Fatahillah, Arif
KadikmA Vol 6, No 1: April 2015
Publisher : KadikmA

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Abstract. Coffee beans are one of Indonesian main export commodities. It can be seen from the amount of coffee exported to other countries, especially Europe. However, the vast area of coffee plantation does not make the productivity of the coffee beans become maximum. There are several factors which influence this condition. One of them is the cropping pattern of coffee plant and the air circulation that affect the pollination process of coffee flower. In this research, an air condition models was designed to solve the problem by employing Volume Hingga method. The models were designed based on the level of plant roughness, distance between coffee plants, and the cropping pattern of coffee (Diamond Ladder Graph). The results of the research is the mathematical models that influenced the level of plant roughness and the cropping pattern of coffee with angle. The symbol of plant roughness in this model is . Coefficient is limited at 0 until 1 (0< <1). The high value of plant roughness coefficient shows the high level of plant roughness. Key Words: coffee plant, air circulation, level of plant roughness, Volume Hingga Method, Diamond Ladder Graph.
ANALISIS KECEPATAN ALIRAN HIDROGEN PEROKSIDA (H2O2) PADA STERILISASI SALURAN AKAR GIGI MENGGUNAKAN METODE NUMERIK VOLUME HINGGA Hardiyanti, Siska Aprilia; Dafik, D; Fatahillah, Arif
KadikmA Vol 6, No 2 (2015)
Publisher : KadikmA

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Abstract. The sterilization of tooth root canal is one of phases at treatment of endodontic or pulp treatment or commonly called tooth root canal treatment. This treatment is necessary because over the years many doctors assumed cavities tooth that cause pain and can not cure, should be pulled out. Endodontic treatment is the appropriate treatment for patient. Endodontic treatment is one of the measures to maintain the tooth in the mouth as long as possible when the pulp tissue has been infected. This research construct a model of tooth root canal and solve sterilization problem by using the finite volume method. Model of simulation process is solved using MATLAB and FLUENT software. The model which is constructed based on direction syringe spray and impeller pressure. Based on the result of the research, if angle of syringe spray is getting greater then the velocity is getting lower, if the angle of syringe spray is getting smaller then the velocity is getting higher. If the value of impeller pressure is more than 6 Pa then velocity is higher, if the value of impeller pressure is less than 6 Pa then velocity is negative value, whereas if the value of impeller pressure is 6 Pa then velocity is moderate value and the change of domain length of tooth root canal is not to great, so the spreading of velocity is evenly. Key Words : Treatment of endodontically, Sterilization of Root Canals, Angle of Syringe Spray, Impeller Pressure, Finite Volume Method.
Co-Authors Adelia Putri Liowardani Ahmad Syaiful Rizal, Ahmad Syaiful Aiyunin, Qurrota Amirullah, Iqbal Anka Monalisa, Lioni Antonius Cahya Prihandoko Arif Wicaksono Arif Wicaksono Arika Indah Kristiana Arnasyitha Yulianti Soelistya Ayu Lestari,, Lisa Azza Liarista Anggraini Brahmanto, Juanda D. Dafik Devi Permatasari Didin Trisnani, Didin Dinawati Trapsilasiwi Diona Amelia, Diona Dody Dwi Aprianto Elsa Yuli Kurniawati Ervin Eka Riastutik, Ervin Eka Excelsa Suli Wildhatul Jannah Faruq, Fathulloh Fatimah, Laila Nurul Fatoni, Muhamad Faizal Fauziyah, Faridah Flavia Aurelia Hidajat, Flavia Aurelia Girlda Elynikie B, Girlda Elynikie Hobri Irsalina Dwi Puspitasari Joni Susanto, Joni Kamalia Fikri Kusumaningtyas, Nastiti Latifah, Izza Wardatul Lestari, Harin Tripuji Lioni Anka Monalisa, Lioni Anka Liowardani, Adelia Putri Lusia Dewi Minarti Lusia Dewi Minarti Madinda, Diah Putri Maharani, Dewi Masyhudi, Muhammad Ali Maulina Syamsu Widyaharti, Maulina Syamsu Maya Margaretha, Puspita Millatuz Zahroh, Millatuz Moch. Avel Romanza P, Moch. Avel Romanza Mochammad Ulin Nuha Mohammad Fadli Rahman Nafisa Afwa Sania Nisa, Choirotun Niswatul Imsiyah Nisyak, Robiatun Novian Nur Fatihah Nur Alfiyantiningsih Nurcholif Diah Sri Lestari Permatasari, Putri Ayu Pradista, Vyke Triawilly Prisma Brilliana Priyanti, Nanda Rahma Purwati, Ratna Puspitasari, Irsalina Dwi Putra, Andhi Septian Hadi Putri, Chika Ramadhanty Twine Ayu Q Qoriatul Qothrunnada, Isni R. Azmil Musthafa, R. Azmil Rafiantika Megahnia Prihandini Randi Pratama Murtikusuma Randi Pratama Murtikusuma Ridho Alfarisi Ridho Alfarisi, Ridho Robiatul Adawiyah S Slamin S Suharto S Sunardi S Susanto Saddam Hussen Saddam Hussen Safira Izza Ghafrina Safira Izza Ghafrina Safitri, Fihrin Luqiyya Septiyan Roby Pratama, Septiyan Roby Setiawan, Renal Heldi Setiawan, Susi Setiawan, Toto’ Bara Setyowati, Henny sholihin, akhmad Siska Aprilia Hardiyanti Siska Binastuti Slamet Hariyadi Soleh Chudin Sufirman Sufirman Suharto Suharto Susanto Susanto Susi Setiawani Susi Setiawani Swasono Rahardjo Theriq Azis Al Husein Titik Sugiarti Titin Kartini Toto Bara Setiawan Trapsilasiswi, Dinawati Umi Azizah Anwar Vahad Agil Liyandri Viantasari, Erwinda Vutikatul Nur Rohmah Wati, Yuli Fajar WIHARDJO, EDY Wiharjo, Edy Yafi, M. Ali Yuli Kurniawati, Elsa Zainul Arifin