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All Journal Matematika: Jurnal Teori dan Terapan TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Ilmiah Kursor Al Ishlah Jurnal Pendidikan BAREKENG: Jurnal Ilmu Matematika dan Terapan International Journal of Supply Chain Management MAJAMATH: Jurnal Matematika dan Pendidikan Matematika Jurnal Maps (Manajemen Perbankan Syariah) Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences Jurnal ComunitA Servizio International Journal of Global Operations Research International Journal of Quantitative Research and Modeling Kontigensi: Jurnal Ilmiah Manajemen SisInfo : Jurnal Sistem Informasi dan Informatika Economics Professional in Action (E-Profit) Jurnal Matematika Integratif Jurnal Maps (Manajemen Perbankan Syariah) In Search (Informatic, Science, Entrepreneur, Applied Art, Research, Humanism) Mathematical Sciences and Applications Journal
Muhammad Deni Johansyah
Departemen Matematika, Fakultas MIPA,Universitas Padjajaran
Religion Arts Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Mathematics Mechanical Engineering Nursing Physics Social Sciences Transportation Other

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GAMPIL : Upaya Penguatan Daya Saing Ritel Mikro di Era COVID-19 dan Peningkatan Minat Memiliki Legalitas Usaha Foster, Bob; Johansyah, Muhamad Deni
Jurnal Maps (Manajemen Perbankan Syariah) Vol. 5 No. 1 (2021)
Publisher : Universitas Ma'soem

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32483/maps.v5i1.94

Abstract

In micro-scale retail, there are problems with the cost of legality management, the high costs and complicated rules are obstacles and the cause of the decrease in the number of legality ownership of micro-scale retailers. Based on this, the Bandung City Government, West Java, innovated using application technology and the internet for legality management, which was called the Gadget Application Mobile for License abbreviated as GAMPIL. This study is intended to determine whether efforts to strengthen internet-based applications can reduce the number of micro retailers that do not yet have legality and create a competitive power for micro-scale retailers in Indonesia, especially the city of Bandung. With a quantitative approach and explanatory research methods, 300 retailers from the city of Bandung, East Bandung to be exact, were taken randomly as a sample in the hope that the research can provide input for the government regarding strengthening the competitiveness of MSMEs in Bandung City through licensing. The results obtained are that the presence of GAMPIL as an application-based business license management innovation is able to increase the competitiveness of micro-scale retailers and their interest in having legality increases by 49.1%.
Rikitake dynamo system, its circuit simulation and chaotic synchronization via quasi-sliding mode control Yi-You Hou; Cheng-Shun Fang; Chang-Hua Lien; Sundarapandian Vaidyanathan; Aceng Sambas; Mustafa Mamat; Muhamad Deni Johansyah
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 19, No 4: August 2021
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v19i4.17700

Abstract

Rikitake dynamo system (1958) is a famous two-disk dynamo model that is capable of executing nonlinear chaotic oscillations similar to the chaotic oscillations as revealed by palaeomagnetic study. First, we detail the Rikitake dynamo system, its signal plots and important dynamic properties. Then a circuit design using Multisim is carried out for the Rikitake dynamo system. New synchronous quasi-sliding mode control (QSMC) for Rikitake chaotic system is studied in this paper. Furthermore, the selection on switching surface and the existence of QSMC scheme is also designed in this paper. The efficiency of the QSMC scheme is illustrated with MATLAB plots.
The Impact of University Uniqueness on Indonesian Universities' Competitiveness in the New Normal Education System Bob Foster; Muhamad Deni Johansyah
AL-ISHLAH: Jurnal Pendidikan Vol 13, No 3 (2021): AL-ISHLAH: Jurnal Pendidikan
Publisher : STAI Hubbulwathan Duri

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.227 KB) | DOI: 10.35445/alishlah.v13i3.1437

Abstract

The new normal learning process remains extremely difficult to implement due to changing one's mentality. Educators are not agents of knowledge dissemination. Nonetheless, it must fundamentally transform into motivators, inspirations, and collaborators in the process of developing the capacity to ask critical questions about the information contained in cyberspace and the general dearth of universities. It can organize online higher education programs properly is still a small number and coupled with students' lack of comprehension of the material provided by the lecturer online, which is significantly different from the face-to-face learning method. This research was conducted descriptively by employing a quantitative approach. This research aims to ascertain the capabilities of universities and their impact on the results achieved by universities in terms of competitiveness. The study's findings indicate that the university's unique capability significantly impacts its competitiveness.
Peranan Desain Kemasan dan Branding dalam Peningkatan Citra Merek Produk Usaha Unggulan Bandung Selatan Bob Foster; Fitriani Reyta; Muhamad Deni Johansyah; Bernadetha Nadeak; Elferida Sormin
JURNAL Comunità Servizio : Jurnal Terkait Kegiatan Pengabdian kepada Masyarakat, terkhusus bidang Teknologi, Kewirausahaan dan Sosial Kemasyarakatan Vol. 2 No. 2 (2020): OKTOBER
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM), Univesitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/cs.v3i1.2898

Abstract

Keunikan kemasan dan bahan kemasa yang berkualitas seringkali menjadikan produk tertentu dinilai memiliki citra merek yang baik di benak konsumen, sebaliknya produk yang di kemas seadanya dan bahan kemasan yang berkualitas rendah menjadikan suatu produk dinilai memiliki citra merek yang rendah. White tea merupakan salah satu produk unggulan yang diproduksi oleh usaha mikro di Bandung selatan tepatnya desa Gambung, Pangalengan. Perkebunan teh Gambung berada di Desa Cisondari, Kecamatan Pasir Jambu, Pangalengan, Kabupaten Bandung menjadi salah satu daerah dengan komoditas teh terbaik di Indonesia, bahkan sampai ke pasar mancanegara yaitu ke pasar komoditas teh di Inggris dan Amsterdam, dirintis oleh Rudolph Eduard Kerkhoven, warga Belanda pada abad 18. Kepemilikan perkebunan teh beragam di Gambung, milik pemerintah, swasta dan masyarakat lokal. Salah satu usaha yang berkembang dikarenakan permintaan tinggi adalah produk white tea. Kemasan produk teh asal Gambung masih dirata ratakan sederhana dan berbahan dasar dus atau kertas dan branding sederhana sehingga produk mahal menjadi terkesan murah, dan menurunkan citra merek juga permintaan produk. Penelitian ini merupakan hasil pengabdian masyarakat yang dilakukan oleh akademisi Universitas Informatika dan Bisnis Indonesia bekerja sama dengan Universitas Padjajaran Bandung, tujuan penelitian adalah untuk mengetahui faktor kemasan dan branding sebagai pendorong penningkatan citra yang dibentuk oleh kemasan dan branding tersebut, 100 responden diambil secara acak dari bagian populasi konsumen loyal di café di kota Bandung. Hasil pengolahan kuisioner menggunakan partial least square menyatakan ada pengaruh desain dan bahan kemasan juga branding terhadap citra merek produk teh putih yang diproduksi oleh usaha Menengah asal Gambung, Kab Bandung, Jabar. Kata Kunci : Desain kemasan, Branding, White tea, Pangalengan, Usaha Unggulan
Intelligent Imaging Technology Implementation as Terrorism Prevention in Retail Sectors in 21st Century Bob Foster; Muhamad Deni Johansyah
Jurnal Ilmiah Kursor Vol 10 No 2 (2019)
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/kursor.v10i2.188

Abstract

Terrorism is a very dangerous thing and has become a threat both on a national and international scale. Understanding terrorism seeks to instill the seeds of hostility towards a group, government agencies and even the state. Before entering the 21st century terror attacks are blatant in the business sector by sabotaging and damaging public facilities and vital objects. These physical attacks can be prevented by recording personal identities or conducting regular security patrols and placing a large number of security personnel in places of business and places that are considered strategic. However, this is still not optimal where the level of security and the number of personnel are limited in monitoring the place for a long time and are sustainable. The terrorist attacks in the 21st century are different and require different handling. Attacks can be physical or non-physical. On non-physical objects attacks are usually carried out by hacking networks that can damage internet network connections in one area and even one country. Ways to prevent attacks that are physical in nature by utilizing computer vision technology capabilities that are used to record all civil society. An additional feature in this technology lies in the face recognition and pattern matching techniques where a person's face will be searched for unique features. Then from these data will be biometric data, namely data that will not change and disappear. Computer vision algorithms can detect a person's face or object even though it has been modified or changed in physical and color conditions. The advantages of these algorithms are effectively used to record visitor identities and are optimal in recognizing an object with an accuracy of up to 90%. This system is able to help and improve a security feature of a business and tourist area.
Solusi Persamaan Diferensial Fraksional Riccati Menggunakan Adomian Decomposition Method dan Variational Iteration Method Muhamad Deni Johansyah; Herlina Napitupulu; Erwin Harahap; Ira Sumiati; Asep K. Supriatna
Matematika Vol 18, No 1 (2019): Jurnal Matematika
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jmtm.v18i1.4931

Abstract

Abstrak. Pada umumnya orde dari persamaan diferensial adalah bilangan asli, namun orde pada persamaan diferensial dapat dibentuk menjadi orde pecahan yang disebut persamaan diferensial fraksional. Paper ini membahas persamaan diferensial fraksional Riccati dengan orde diantara nol dan satu, dan koefisien konstan. Metode numerik yang digunakan untuk mendapatkan solusi dari persamaan diferensial fraksional Riccati adalah Adomian Decomposition Method (ADM) dan Variational Iteration Method (VIM). Tujuan dari paper ini adalah untuk memperluas penerapan ADM dan VIM dalam menyelesaikan persamaan diferensial fraksional Riccati nonlinear dengan turunan Caputo. Perbandingan solusi yang diperoleh menunjukkan bahwa VIM adalah metode yang lebih sederhana untuk mencari solusi persamaan diferensial fraksional Riccati nonlinier dengan orde antara nol dan satu, kemudian hasil yang diperoleh disajikan dalam bentuk grafik.Kata kunci: diferensial, fraksional, riccati, adomian dekomposisiThe solution of Riccati Fractional Differential Equation using Adomian Decomposition methodAbstract. Generally, the order of differential equations is a natural numbers, but this order can be formed into fractional, called as fractional differential equations.  In this paper, the Riccati fractional differential equations with order between zero and one, and constant coefficient is discussed.  The numerical methods used to obtain solutions from Riccati fractional differential equations are the Adomian Decomposition Method (ADM) and Variational Iteration Method (VIM).  The aim of this paper is to expand the application of ADM and VIM in solving nonlinear Riccati fractional differential equations with Caputo derivatives.  The comparison of the obtained solutions shows that VIM is simpler method for finding solutions to Riccati nonlinear fractional differential equations with order between zero and one. The obtained results are presented graphically.Keywords: riccati, fractional, differential, adomian, decomposition
Analisis Turunan dan Integral Fraksional Fungsi Pangkat Tiga dan Fungsi Eksponensial Muhamad Deni Johansyah; Julita Nahar; Farid H. Badruzzaman
Matematika Vol 16, No 2 (2017): Jurnal Matematika
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jmtm.v16i2.3357

Abstract

Abstrak. Ide dari konsep turunan fraksional adalah bagaimana menentukan turunan yang berorde suatu bilangan pecahan (fraksional) yaitu bilangan rasional atau bahkan bilangan real. Dalam makalah ini dikaji tentang definisi, teorema, dan karakteristik serta contoh turunan fraksional pada fungsi pangkat tiga dan fungsi eksponen yang dikembangkan oleh matematikawan Riemann dan Liouville. Metode penelitian yang ditempuh adalah melalui studi literatur primer, yaitu dengan mengembangkan teori yang telah dikerjakan peneliti terdahulu, sehingga metode tersebut dapat diterapkan untuk penyelesain masalah yang dapat diaplikasikan dan dikembangkan secara lebih luas. Hasil dari makalah ini berupa analisis dari turunan fraksional fungsi pangkat sederhana dan fungsi eksponensial.Keywords: turunan fraksional, fungsi pangkat tiga, fungsi eksponenAbstract. The idea of the fractional derivative concept is how to determine the derivation with fractional order, that is a rational number or even a real number. In this paper, we examine the definitions, theorems, and the characteristics as well as fractional derivatives example of the cubic and exponential functions in which developed by mathematician Riemann and Liouville. This research is done by primary literature review, that is by developing the theory that has been done by the previous researcher, so that the method of problem solving can be applied and developed widely. The results of this paper are the analysis of fractional derivatives from simple-order and exponential functions.Keywords: fractional derivatives, cubic functions, exponential functions
Analisis Jumlah Produksi Kerudung Pada RAR Azkia Bandung Dengan Metode Economic Production Quantity (EPQ) Farid H Badruzzaman; Erwin Harahap; Eti Kurniati; M. Deni Johansyah
Matematika Vol 16, No 2 (2017): Jurnal Matematika
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jmtm.v16i2.3506

Abstract

Abstrak. Permasalahan dari persediaan adalah bagaimana menentukan jumlah produksi optimal dengan biaya total persediaan yang minimum. Sebuah persediaan dilakukan tidak lain dengan maksud mengantisipasi dan memenuhi permintaan yang akan datang. Penyimpanan persediaan dalam jangka waktu yang lama akan berdampak pada keusangan dan menurunnya kualitas, sehingga diperlukan perhitungan jumlah persediaan yang optimal. Model persediaan Economic Production Quantity (EPQ) merupakan suatu metode yang digunakan untuk mempertimbangkan jumlah produksi dan jumlah permintaan hasil produksi. Tujuannya adalah dengan menentukan banyaknya produksi yang meminimumkan total biaya persediaan. Penelitian ini bertujuan untuk menghitung jumlah produksi optimum pada perusahaan kerudung. Selama ini, jumlah produksi pada tahun 2017 dan sebelumnya berpedoman pada jumlah pesanan pelanggan ditambah 17,5% dari jumlah permintaan untuk cadangan persediaan. Hasil solusi optimum dengan model EPQ memiliki perbedaan yang signifikan dibandingkan dengan yang selama ini berlaku.Kata Kunci: economic production quantity, persediaan, produksiAbstract. The problem of inventory is how to determine the optimal amount of production with minimum total inventory cost. An inventory is carried out with no other intent to anticipate and meet future demand. Storage of inventory over a long period of time will have an impact on obsolescence and declining quality, so it is necessary to calculate the optimal amount of inventory. Model inventory Economic Production Quantity (EPQ) is a method used to consider the number of production and the number of production demand. The goal is to determine the amount of production that minimizes the total cost of inventory. This study aims to calculate the number of optimum production on the company's hood. So far, the number of production in 2017 and previously guided by the number of customer orders plus 17.5% of the total demand for inventory reserves. The results of the optimum solution with the EPQ model have significant differences compared to those currently in force.Keywords: economic production quantity, inventory, production
Teknik Penentuan Solusi Sistem Persamaan Diferensial Linear Non-Homogen Orde Satu Ahmad Nurul Hadi; Eddy Djauhari; Asep K Supriatna; Muhamad Deni Johansyah
Matematika Vol 18, No 1 (2019): Jurnal Matematika
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jmtm.v18i1.5079

Abstract

Abstrak. Penentuan solusi sistem persamaan diferensial linear non-homogen orde satu dengan koefisien konstanta, dilakukan dengan mengubah sistem persamaan tersebut menjadi persamaan diferensial linear non homogen tunggal. Dari persamaan diferensial linear non homogen tunggal tersebut kemudian dicari solusi homogennya menggunakan akar-akar karakteristiknya, dan mencari solusi partikularnya dengan metode variasi parameter. Solusi umum dari persamaan diferensial linear tersebut adalah jumlah dari solusi homogen dan solusi partikularnya. Persamaan diferensial linear tunggal tersebut berorde- , yang solusi umumnya berbentuk . Selanjutnya dicari solusi umum berebentuk  yang berkaitan dengan , solusi umum berbentuk  yang berkaitan dengan  dan , solusi umum berbentuk  yang berkaitan dengan , , dan , demikian seterusnya sampai mencari solusi umum berbentuk  yang berkaitan dengan , , , , . Kumpulan solusi umum yang berbentuk  merupakan solusi umum dari sistem persamaan diferensial linear non homogen orde satu tersebut.Kata kunci:  Diferensial, Linear, Non-Homogen, Orde, Satu. Technical to Find The System of Linear Non-Homogen Differential Equation of First OrderAbstract. Determination of first-order non-homogeneous linear differential equation system solutions with constant coefficients, carried out by changing the system of equations into a single non-homogeneous linear differential equation. From a single non-homogeneous differential equation, a homogeneous solution is then used using its characteristic roots, and looking for a particular solution with the parameter variation method. The general solution of these linear differential equations is the number of homogeneous solutions and their particular solutions. The single linear differential equation is n-order, the solution being in the form of  . Then look for a general solution in the form of  related to , a general solution in the form of related to  and , general solutions in the form of related to  ,  and , and so on until looking for a general solution in the form of  related to , , ,  ..., . A collection of general solutions in the form of , , , ...,  is the general solution of the first-order non-homogeneous linear differential equation system.Keywords: Linear, Differential, First, Order, Non-Homogeneous
A New 3-D Multistable Chaotic System with Line Equilibrium: Dynamic Analysis and Synchronization Muhamad Deni Johansyah
International Journal of Quantitative Research and Modeling Vol 2, No 1 (2021)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (707.682 KB) | DOI: 10.46336/ijqrm.v2i1.126

Abstract

This work introduces a new 3-D chaotic system with a line of equilibrium points. We carry out a detailed dynamic analysis of the proposed chaotic system with five nonlinear terms. We show that the chaotic system exhibits multistability with two coexisting chaotic attractors. We apply integral sliding mode control for the complete synchronization of the new chaotic system with itself as leader-follower systems.
Co-Authors Aceng Sambas Adrizal Boby Rachman Afif Haekal Ismoyo Aggi Panigoro Sarifiyono Agus Supriatna Ahmad Nurul Hadi Al Affiani, Hanifah Amiral Aziz Anang Bambang Pujianto Ari Utami Asep K Supriatna Asep K. Supriatna Badrulfalah Badrulfalah Bernadetha Nadeak Bob Foster Chang-Hua Lien Cheng-Shun Fang Deny I. Rakhmatullah Dwi Susanti Dwi Susanti Dwi Susanti Eddy Djauhari Eddy Djauhari Elferida Sormin Ema Carnia Endang Rusyaman Erwin Harahap Eti Kurniati Farid H Badruzzaman Farid H. Badruzzaman Fitri Reyta Gilar Sundara Hamidzadeh, Seyed Mohamad Hasna Muti Andini Herlina Napitupulu Iin Irianingsih Iin Irianingsih Ira Sumiati Iwan Sidharta Julita Nahar Julita Nahar Julita Nahar Julita Nahar, Julita Mohamed, Mohamad Afendee Mustafa Mamat Nabil . Nibros Komara Purnama, Susan Qurrotun A’yun A R. Sudrajat Reyta, Fitriani Riaman . Salma Az-Zahra Sheila Najla Syahirah Sisilia Sylviani Siti Aizal Yasni Ellena Sundarapandian Vaidyanathan Susan Purnama Susan Purnama Vaidyanathan, Sundarapandian Yi-You Hou