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All Journal CAUCHY: Jurnal Matematika Murni dan Aplikasi Jurnal Pengabdian Masyarakat Khatulistiwa Jurnal Riset Mahasiswa Matematika
Juhari Juhari
Universitas Islam Negeri Maulana Malik Ibrahim Malang
Arts Humanities Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Public Health Social Sciences Other

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PEMANFAATAN LAHAN KOSONG DALAM UPAYA KETAHAN PANGAN MASYARAKAT LOKAL DI RW 13 PURWODADI BLIMBING MALANG Juhari Juhari
Jurnal Pengabdian Masyarakat Khatulistiwa Vol 4, No 2 (2021): NOPEMBER
Publisher : STKIP Persada Khatulistiwa Sintang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31932/jpmk.v4i2.1398

Abstract

ABSTRAKWilayah di RW 13 kelurahan Purwodadi Blimbing kota Malang mengalami perubahan sangat pesat terutama pada lahan pertanian yang telah berubah menjadi area perumahan dan komplek. Namun adapula tanah yang dibiarkan kosong, terbengkalai, dan tidak terawat dengan baik. Selain terlihat kumuh dan kotor, tanah kosong ini dikhawatirkan menjadi sarang ular, nyamuk, dan lebih sering menjadi tempat pembuangan sampah. Tujuan artikel ini untuk memaparkan pemanfaatan lahan kosong di wilayah RW 13 kelurahan Purwodadi Blimbing kota Malang sebagai salah satu upaya membangun perilaku ketahanan pangan dalam keseharian masyarakat lokal. Metode yang digunakan adalah eksperimen. Warga memanfaatkan lahan kosong untuk ditanami dengan tanaman yang di konsumsi sehari-hari, seperti sayuran dan Lombok. Hasil dari eksperimen memperlihatkan bahwa pemanfaatan lahan kosong memberikan dampak yang positif bagi masyarakat sekitar yaitu terpeliharanya lingkungan yang bersih dan menghasilkan sayuran yang dapat dikonsumsi warga secara langsung.Kata Kunci: Purwodadi Blimbing Malang: Lahan Kosong; Ketahanan Pangan ABSTRACTThe area in RW 13, Purwodadi Blimbing, Malang has experienced very rapid changes, especially on agricultural land which has turned into a residential area and complex. However, there are also lands that are left empty, neglected, and not properly maintained. Apart from looking shabby and dirty, there are concerns that this empty land will become a nest for snakes, mosquitoes, and more often it becomes a garbage dump. The purpose of this article is to describe the use of vacant land in the area of RW 13, Purwodadi Blimbing, Malang as an effort to build food security behavior in the daily lives of local communities. The method used is experimental. The residents use the vacant land to be planted with crops for daily consumption, such as vegetables and chili. The results of the experiment show that the use of vacant land has a positive impact on the surrounding community, namely maintaining a clean environment and producing vegetables that can be consumed directly by residents.Keywords: Purwodadi Blimbing Malang; Wasteland; Food Security
On the Application of Noiseless Steganography and Elliptic Curves Cryptography Digital Signature Algorithm Methods in Securing Text Messages Juhari Juhari; Mohamad Febry Andrean
CAUCHY: Jurnal Matematika Murni dan Aplikasi Vol 7, No 3 (2022): CAUCHY: JURNAL MATEMATIKA MURNI DAN APLIKASI
Publisher : Mathematics Department, Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/ca.v7i3.17358

Abstract

Elliptic curve cryptography includes symmetric key cryptography systems that base their security on mathematical problems of elliptic curves. There are several ways that can be used to define the elliptic curve equation that depends on the infinite field used, one of which is the infinite field prima (  where ). Elliptic curve cryptography can be used for multiple protocol purposes, digital signatures, and encryption schemes.The purpose of this study is to determine the process of hiding encrypted messages using the Noiseless Steganography method  as well as the generation of private keys and public keys and the process of verifying the validity of the Elliptic Curves Cryptography Digital Signature Algorithm (ECDSA).  The result of this thesis is that a line graph is obtained that store or hides a message using the steganography method and a message authenticity from the process of key generation and verification of validity using the ECDSA method. By selecting three samples consisting of one test sample and two differentiating samples, a line graph,  an MD5 hash value, and a value at the point are obtained  different. Successively obtained values  to message “Matematika 2018”, “MATEMATIKA 2018”, and “2018 matematika” are and . The discussion in this thesis only covers the elliptic curves on prime finite field. So, for the next thesis, the next researcher can do a discussion about the elliptic curve on the finite field  or the application of elliptic curve cryptography and other steganographic methods
Analisis Dinamik Model Matematika Penyebaran COVID-19 Pada Populasi SEIR Ester Meyliana; Ari Kusumastuti; Juhari Juhari
Jurnal Riset Mahasiswa Matematika Vol 1, No 4 (2022): Jurnal Riset Mahasiswa Matematika
Publisher : Mathematics Department, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.545 KB) | DOI: 10.18860/jrmm.v1i4.14458

Abstract

This study discusses the dynamic analysis of the mathematical model of the spread of COVID-19 using daily cases in Indonesia which are classified into four variables, namely, Susceptible (S), Exposed (E), Infected (I), and Recovered (R) which are then analyzed dynamically by calculate the equilibrium point and look for stability properties. The two equilibrium points of this model are the disease-free equilibrium point  and the endemic equilibrium point . Then, it is linearized around the equilibrium point using the given parameters. Linearization around the equilibrium point  produces four eigenvalues, one of which is positive. Linearization around the equilibrium point  yields two negative real eigenvalues and a pair of complex eigenvalues with negative real parts. Phase portraits and numerical simulations have shown that all variables S, E, I, and R will be asymptotically stable locally towards the equilibrium point, namely the endemic equilibrium point . Thus, based on the dynamic analysis obtained, it is shown that the disease-free equilibrium point  is unstable and the endemic equilibrium point is locally asymptotically stable.
Prosedur Fuzzy Tahani Menggunakan Fungsi Representatif Kurva Segitiga dan Trapesium Wise Ahmad Sofia; Juhari Juhari
Jurnal Riset Mahasiswa Matematika Vol 1, No 1 (2021): Jurnal Riset Mahasiswa Matematika
Publisher : Mathematics Department, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (853.738 KB) | DOI: 10.18860/jrmm.v1i1.13819

Abstract

Fuzzy Tahani is one of the developments of fuzzy logic applications. This study will explain the fuzzy Tahani procedure using representative membership functions of triangular and trapezoidal curves with fuzzification steps, determining fuzzy domains, membership functions and degrees, compiling criteria, determining fire strength values, and determining recommendation results. The fuzzy Tahani method uses the AND operation so as to produce a minimum fire strength value that affects the recommendation results. Then the research variables used are price, dimensions, weight, battery capacity, and screen display variables. For the triangular curve there are 3 fuzzy sets, namely small, medium, and large, while the trapezoidal curve consists of 4 fuzzy sets, namely small, medium, large, and very large. The data used in this study is secondary smartphone data, branded Oppo, Xiaomi, Samsung, Vivo, and Asus. From the results of smartphone data analysis according to the Fuzzy Tahani method used, these variables are processed by entering the rules, amounting to 243 for triangular curves and 1,024 for trapezoidal curves and then processed using AND operation and the conclusion is that triangular curves are better than trapezoidal curves. in recommending the purchase of a smartphone
Co-Authors Ari Kusumastuti Ester Meyliana Mohamad Febry Andrean Wise Ahmad Sofia