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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 EDU-MAT: Jurnal Pendidikan Matematika Journal of Research and Advances in Mathematics Education 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 Limits: Journal of Mathematics and Its Applications
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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OPTIMASI HASIL PRODUKSI GENTENG MENGGUNAKAN GOAL PROGRAMMING SEBAGAI MONOGRAF Nisa, Choirotun; Setiawan, Susi; Fatahillah, Arif
Kadikma Vol 10 No 1 (2019): April 2019
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v10i1.11812

Abstract

Optimization is the best decision making activity that can be carried out by the company related to the industry in question within existing limitations by involving limiting determinant variables. The problems faced by UD Pastijaya are the limitations that exist in an effort to maximize the production of roof tiles by optimally using the variable variables available to obtain an increase in tile production. The solution that can be done is to use the Goal Programming method which is the development of the Linear programming method. This method is used to solve the problem of determining the amount of optimal production with limited resources as targets to be achieved. The optimization results are carried out by using the POM-QM assistance application. The number of tile production has increased in several types of tiles including coral reefs as many as 52425 units, press as many as 51955 units, morando as many as 12441 units, and wuwung as many as 9310 units. Keywords: Production optimization, tile, Goal Programming
ANALISIS DESKRIPTIF LEVEL PERTANYAAN PADA SOAL CERITA DI BUKU TEKS MATEMATIKA SMK PROGRAM KEAHLIAN RUMPUN SENI, PARIWISATA, DAN TEKNOLOGI KERUMAHTANGGAAN KELAS XI PENERBIT PUSAT PERBUKUAN DEPARTEMEN PENDIDIKAN NASIONAL BERDASARKAN TAKSONOMI SOLO Septriana, Maharani Dewi; Hobri, Hobri; Fatahillah, Arif
Kadikma Vol 7 No 2 (2016): Agustus 2016
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v7i2.22864

Abstract

The goal of this research aims to describe the percentage of each level question about the narrative question on mathematics textbook for second class of SMK for art, tourism, and household technology skill program based on SOLO taxonomy. The data used in the research is form of narrative questions on the mathematics textbook. To analyze the data, we use descriptive approach. The result of this research was precentage of level question based Taxonomy SOLO. Therefore, the percentage of Unistructural Level are 0%; Multistruktural Level are 49,52%; Relasional level are 50,48%; and Extended Abstrack Level are 0%.
PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF ONLINE BERBANTUAN DESMOS PADA KELASKITA MATERI PROGRAM LINIER KELAS XI SMA Kusumaningtyas, Nastiti; Trapsilasiwi, Dinawati; Fatahillah, Arif
Kadikma Vol 9 No 3 (2018): Desember 2018
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v9i3.11003

Abstract

This research aims to develop a Desmos-assisted interactive online instructional media using “Kelas Kita” on Linier Program material. The instructional media being developed is Desmos-assisted “Kelas Kita”. The research was conducted at SMA 3 Muhammadiyah Jember on eleventh grade students of IPA 2. This research is a developmental research. This research applied Thiagarajan model which consists of 4 stages namely: 1) Defining stage 2) Designing stage 3) Developing stage 4) Disseminating stage. The development results of this research includes validity test of validation sheet analysis from 3 validation tools. The assessment results from the validation tools showed the very high category in details of an average value of 0.89. The practicality test based on the user response questionnaire showed the very practical category with an average value of 1.7 or at a percentage level of 85%. This media achieved the very effective category 28 from 34 students acquired scores more than or equivalent to the minimum criteria of mastery learning. The results of the effectiveness showed that the eleventh grade students of IPA 2 who completed the test were about 82.85% of the students. Based on the research result, it showed that the media used have met the validation, practicality, and effectiveness criteria. Therefore, it is assumed that this media is feasible to be used as an instructional media. Keywords: Kelaskita, Desmos, Learning Media
PEMODELAN MATEMATIKA ALIRAN UDARA PADA BRONKUS AKIBAT PENYAKIT BRONKITIS KRONIS Permatasari, Devi; Fatahillah, Arif; Setiawani, Susi
Kadikma Vol 11 No 1 (2020): April 2020
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v11i1.17914

Abstract

Chronic bronchitis is a disease that attacks the respiratory tract and is one of the dangerous diseases that can cause death in the world. This study builds a mathematical model of airflow velocity in the bronchi due to chronic bronchitis which is influenced by mucus thickness and initial velocity. The type of research used is simulation research to find a picture of a simple system that will be manipulated or controlled to get an effect similar to the actual situation. The mathematical model is built on the reduction of the momentum equation and the mass continuity equation which is solved using the finite volume method and the QUICK discretization technique. The volume method is used because the fluid flow studied is O2 gas which is classified as unstructured. So by using the volume method, it will be easier to discretize to determine the values ​​that will be sought in the discretization process.
PEMODELAN MATEMATIKA ALIRAN UDARA PADA BRONKUS AKIBAT PENYAKIT ASMA BRONKIAL Madinda, Diah Putri; Fatahillah, Arif; Setiawani, Susi
Kadikma Vol 10 No 2 (2019): Agustus 2019
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v10i2.17397

Abstract

Bronchial asthma is a disease of the narrowing of the airways located in the human bronchi. One of the factors causing this narrowing is Particulate Matter 2.5. Particulate Matter 2.5 is a kind of particle with dust that can cause narrowing of the airways. These particles are very small, ie less than 2.5 micrometer and can enter the lungs. Mathematical modeling is a way of solving problems that describe a mathematical solution in the real world. Mathematical modeling can form a mathematical model that describes the flow of air on the bronchi due to bronchial asthma according to actual conditions and important influences in them. In this study formed a mathematical model of bronchial air flow due to bronchial asthma. Mathematical models are obtained from the momentum and mass equations which are solved using the finite volume method. Keywords: Asthma, Mathematical modeling, Finite volume
ANALISIS NUMERIK PROFIL SEDIMENTASI PASIR PADA PERTEMUAN DUA SUNGAI BERBANTUAN SOFTWARE FLUENT Fatahillah, Arif
Kadikma Vol 5 No 3 (2014): Desember 2014
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v5i3.1385

Abstract

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
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
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v4i1.1050

Abstract

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,
PEMODELAN MATEMATIKA ALIRAN DARAH PADA ARTERI KORONER AKIBAT PEMASANGAN STENT Amirullah, Iqbal; Fatahillah, Arif; Setiawan, Toto Bara
Kadikma Vol 10 No 1 (2019): April 2019
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v10i1.11726

Abstract

Coronary heart disease is a disease caused by accumulation of cholesterol that forms plaques on artery walls for a considerable period of time. Over time, this disease can cause the heart muscle to weaken, and cause complications such as heart failure. One of ways to treat coronary heart disease is the stent installation (rings) or commonly called angioplasty. Angioplasty aims to make the blood vessels narrow to open so that blood flow flows better. The emergence of mathematical modeling as a new science is one alternative to solve these problems. With mathematical modeling, practitioners can make a form of a formula that describes the state of blood flow in the coronary arteries according to actual conditions without ignoring important factors in the system. In this study a mathematical model was built based on the above problems to determine the effectiveness of stent installation or angioplasty in the process that occurs in coronary arteries. Keywords: Coronary heart disease, Mathematical modeling, Stent
PEMODELAN MATEMATIKA PADA PROSES PEMBEKUAN ES DI RUANG BRINE TANK PABRIK ES BALOK TALANGSARI JEMBER Sholihin, Akhmad; Fatahillah, Arif; Setiawan, Toto' Bara
Kadikma Vol 10 No 3 (2019): Desember 2019
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v10i3.17404

Abstract

One of the main activities of block ice production is the process of freezing ice blocks in the brine tank. Brine Tank is a tank that functions to freeze ice blocks. Brine Tank contains salt water. Mathematical modeling is a formulation of mathematical models that describe how to get a solution to a mathematical problem in a natural event. Mathematical modeling can form mathematical models that describe the process of ice freezing in brine tanks in accordance with actual conditions without ignoring important factors in the system. The mathematical model in the process of ice freezing in the Brine Tank is obtained from the momentum equation and the energy equation which is solved using the finite volume method. In this study a mathematical model was built to determine the effectiveness of time in the ice freezing process in the brane tank.
PEMODELAN WIND TURBINE ROTOR TIPE HAWT (HORIZONTAL AXIS WIND TURBINE) MENGGUNAKAN METODE VOLUME HINGGA Zahroh, Millatuz; Dafik, D; Fatahillah, Arif
Kadikma Vol 6 No 2 (2015): Agustus 2015
Publisher : Department of Mathematics Education , University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/kdma.v6i2.1983

Abstract

Abstract. A Wind turbine is a wind energy converters tool into electrical energy. To optimize the electrical energy converted, it needs for further research on wind turbine process. In this research, the analysis part of wind turbine is rotor, which is the contacted part to the wind. Type of wind turbine that will be analyzed in this study is HAWT (Horizontal Axis Wind Turbine) type because this model is the most often used type and can produce great electrical energy. This research construct a model of the air flow field form of wind turbine rotor and solve these problems by using the finite volume method. Model simulation process will be done by using MATLAB and FLUENT software. The analysis was performed with the variation initial velocity level of wind. It is 3 m/s, 5 m/s, and 7 m/s. The simulation results showed that the velocity of rotation wind turbine rotor blade higher when the initial wind velocity increases. Beside that, the result is when the initial wind velocity of 7 m/s and 5 m/s, the velocity of rotation wind turbine rotor blade tend to be more stable. With 5 m/s of wind velocity to wind turbine rotor, The difference between an average direct calculation and a SOR iterative calculation is obtained the value of relative error less than 0.1%. it is 0.079%. So the finite volume method of numerical methods is effective to solve this problem. Key Words : Electrical Energy, Finite Volume Method, Velocity, Wind Turbine,.
Co-Authors Adelia Putri Liowardani Ahmad Syaiful Rizal, Ahmad Syaiful Aiyunin, Qurrota Amirullah, Iqbal 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 Fatoni, Muhamad Faizal Fauziyah, Faridah Flavia Aurelia Hidajat, Flavia Aurelia Girlda Elynikie B, Girlda Elynikie Hobri Irsalina Dwi Puspitasari Isni Qothrunnada Joni Susanto, Joni Kamalia Fikri Kusumaningtyas, Nastiti Latifah, Izza Wardatul Lestari, Harin Tripuji Lioni Anka Monalisa 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 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 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