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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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Pengaruh Product, Price, Place, Promotion, dan Proccess terhadap Mahasiswa dalam Menentukan Pilihan Prodi Manajemen di FEB UNIBI Anang Bambang Pujianto; Aggi Panigoro; Muhamad Deni Johansyah
Economics Professional in Action (E-Profit) Vol 6 No 1 (2024): Economic Professional in Action (E-PROFIT)
Publisher : LPPM Universitas Informatika dan Bisnis Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37278/eprofit.v6i1.823

Abstract

This study identifies the influence and measures the influence of marketing mix on student decisions to choose management study programs. The sample selected is random sampling of 76 respondents using multiple linear regression analysis. Partial results of Product, Price, Place & Promotion have no influence on student decisions in determining the choice of management study programs it can from the t-count < t-table. Proccess has a positive influence on the student decision in choosing management study programs from the t-count > t-table. The simultaneous results of Product, Price, Place, Promotion & Process, simultaneously have a positive influence on student decisions in determining the choice of management study program from the f-count > f-table. Adjusted R2 value is 0.184 or 18.4$, it means the marketing mix component affects the component of student decisions in choosing management study programs is 18.4%, while the remaining 81.6% of other things have not been studied.
Aplikasi Teorema Fermat dalam Kriptografi Al Affiani, Hanifah; Johansyah, Muhammad Deni; Sylviani, Sisilia
Mathematical Sciences and Applications Journal Vol. 5 No. 1 (2024): Mathematical Sciences and Applications Journal
Publisher : Department of Mathematics, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/msa.v5i1.38094

Abstract

Cryptography is the science and technique of disguising messages in a unique form so that they can only be read and processed by the intended recipient. Many studies have been conducted to develop algorithms that can be used to encode information in a way that is difficult to crack and cannot be recognized by adversaries. One example of the most popular algorithms is the Rivest-Shamir-Adleman (RSA), which uses different key pairs for the encryption and decryption process of messages, usually known as the public key and private key. In public key-based encryption systems such as RSA, Fermat's theorem plays an important role because it enables modular exponential calculations on key pairs to be performed efficiently and provides a security basis for the RSA algorithm. Thus, this research aims to describe the application of Fermat's theorem in the RSA algorithm, where the encryption and decryption process involves modular exponentiation with public and private keys. As a result, using the properties of modular exponentiation in Fermat's theorem, this system ensures information remains secure from attacks by third parties without access to the private key, even if they succeed in intercepting encrypted messages. It can be concluded that Fermat's theorem plays a crucial role in establishing a solid mathematical foundation for creating secure and efficient cryptographic systems.
Hospital Safety Box Monitoring: Building Brand Trust in Healthcare Business During Covid -19 Wave Johansyah, Muhamad Deni; Purnama, Susan
International Journal of Global Operations Research Vol. 2 No. 1 (2021): International Journal of Global Operations Research (IJGOR), February 2021
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v2i1.64

Abstract

The health business is adjusting to a new reality where bargaining power has shifted to consumers. Consumers are now playing a key role in the commercialization process, making them important stakeholders to fulfill their needs. Health business reforms have convinced consumers to give protection a greater priority than ever since the COVID-19 pandemic escalated around the world. Health care businesses in Indonesia are no exception, should increase their brand trust, because of the huge responsibility to protect consumers from the prevention of COVID-19, and brand trust also gives added value to the hospital's own brand. A brand with the right value proposition can "prove" the true value of its product or service to patients in the minds of consumers, one of which is from medical waste management. Hospital waste is usually a contagious and toxic chemical that can affect human health and environmental impacts if not treated properly. Medical waste including sharp objects, infectious waste, pharmaceutical waste, and other waste is mostly generated in health facilities such as health centers and hospitals. such as intravenous lines, syringes, gloves, which after use must be handled and destroyed in such a way that they do not fall into the hands of the public or even injure medical personnel. The Smart Waste concept is here to answer the challenges of trust in hospital brands in Indonesia, especially in the city of Bandung, increasing the sense of security of consumers is the main goal of this concept where hospital safety boxes work together with sensors and microcontrollers, disposal of syringes can be done more intelligently. , safe and the risk of medical personnel punctured by infected needle waste can be reduced.
CHAOS CONTROL IN PERMANENT MAGNET SYNCHRONOUS MOTOR BY SLIDING MODEL CONTROLLER WITH LYAPUNOV OBSERVER UNDER UNKNOWN INPUTS Hamidzadeh, Seyed Mohamad; Aziz, Amiral; Mohamed, Mohamad Afendee; Vaidyanathan, Sundarapandian; Johansyah, Muhamad Deni
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 20 No 1 (2026): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol20iss1pp0541-0556

Abstract

The control of chaotic and hyper-chaotic systems represents a crucial area of research in the field of nonlinear dynamic systems. In this study, we focus on applying chaos control techniques to a permanent magnet synchronous motor (PMSM), a system known to exhibit chaotic behavior under certain conditions. To achieve this, a sliding mode control (SMC) strategy integrated with a Lyapunov-based observer is proposed. The core concept involves designing a candidate Lyapunov function that governs the application of the control law, ensuring system stability while effectively suppressing chaotic dynamics. Through numerical simulations, the proposed sliding mode controller demonstrates its effectiveness in rapidly eliminating chaotic behavior and stabilizing the PMSM system toward a predefined reference trajectory. Notably, the system achieves error convergence within approximately 0.7 seconds under full control (four channels). When control channels are reduced to two, the system still maintains stability, showing flexibility and cost efficiency. In a further simulation, the chaotic PMSM is subjected to two unknown external disturbances, and the proposed controller continues to maintain stability with only a slight increase in convergence time. These quantitative results affirm the robustness, accuracy, and practicality of the proposed control method. This research confirms that integrating sliding mode control with a Lyapunov observer is an effective approach for chaos suppression in PMSMs, offering promising insights for the development of advanced control strategies in nonlinear electromechanical 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