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All Journal International Journal of Computing Science and Applied Mathematics Jurnal Teknologi Dirgantara GUYUB: Journal of Community Engagement Jurnal Kajian Matematika dan Aplikasinya Journal Focus Action of Research Mathematic (Factor M)
Hamid, Nur
Nurul Jadid University
Religion Aerospace Engineering Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Physics Social Sciences Other

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BASIS UNTUK SKEMA ASOSIASI GRUP MATRIKS ATAS Z3 Nur Hamid; Cahyu Guswita; Saiful Islam; M. Faiz Nailun Ni'am
Jurnal Kajian Matematika dan Aplikasinya (JKMA) Vol 2, No 2 (2021): July
Publisher : UNIVERSITAS NEGERI MALANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um055v2i22021p21-25

Abstract

Some combinatorial problems in Mathematics can be studied via association scheme. By this scheme, algebra structure called Bose-Mesner algebra can be obtained. In this article, we show the explicit forms of the idempotent primitive of an association scheme for the group of order 48. Keywords: Association scheme, idempotent primitif
Structure Relaxation Disruption on Temperature-dependence of Polymerization of HTPB-based Polyurethane Afni Restasari; Nur Hamid; Leonard Marpaung; Andi Rusnaenah; Adi Sukma; Rahmawati Sukma
Jurnal Teknologi Dirgantara Vol 19, No 2 (2021)
Publisher : National Institute of Aeronautics and Space - LAPAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2021.v19.a3654

Abstract

The temperature-dependence of polymerization rate of hydroxyl-terminated polybutadiene (HTPB)-based polyurethane can be disrupted by a structure relaxation of polymer.  Objective of the study is to investigate the disruption on the polyurethane (PU) formed of various molecular weight of HTPB. The study was carried out by applying temperature of 50, 60 and 70 oC in measuring viscosity until 80 minutes of reaction. The sample that were used is HTPB with various molecular weight and Toluene diisocyanate (TDI). Based on decreasing value of viscosity, it is obtained that relaxation temperature of HTPB-based PU is around 60 – 70 oC. By applying Eyring equation of flow, it is found that relaxation of structure causes the existence of relaxation dominant-time (RDT). RDT is the reaction time at which molar volume reaches the maximum value. Furthermore, by determining activation entropy, the RDT was revealed to be a borderline between two type of polymerization. Linear reaction occurs before RDT, while cross-link reaction occurs after RDT. From structure point of view, PU-polymerization type of HTPB with low molecular weight tend to be more sensitive towards structure relaxation which is originated from hard segment.  
PKM Pendampingan Pembelajaran Materi Bangun Datar dengan Billingual LED Running Text di Madrasah Ibtidaiyah (MI) Az-Zainiyah II Paiton Probolinggo Nur Hamid; Muhammad Faiz Nailun Ni'am; Cahyu Guswita; Saiful Islam; Silviana Qomariyah; Siti Fatimah; Siti Khoifah
GUYUB: Journal of Community Engagement Vol 2, No 2 (2021): Pendampingan Lembaga Pendidikan dan Media Pembelajaran Teknologi di Masa Covid-1
Publisher : Universitas Nurul Jadid

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33650/guyub.v2i2.2403

Abstract

Siswa sekolah dasar kebanyakan belum mengetahui dan memahami bentuk-bentuk bangun datar. Selain itu, para guru juga jarang menggunakan media dalam menjelaskan materi bangun datar kepada siswanya. Keadaan ini membuat pembelajaran terkesan kurang menarik bagi siswa. Dalam hal ini, media pembelajaran dapat dijadikan alternatif agar pembelajaran lebih menarik. PKM ini bertujuan memberikan pendampingan pembelajaran melalui media LED Running Text. Subjek dampingan PKM adalah para siswa kelas 4 MI Azzainiyah II Paiton Probolinggo. Metode yang diterapkan adalah metode partisipatoris. Hasil PKM adalah meningkatnya minat belajar siswa dan pemahaman siswa terhadap materi bangun datar, dan meningkatnya kreativitas siswa dalam menyelesaikan masalah dan mempresentasikannya dengan baik di depan kelas.
Implementation of Coding Theory with The Extended Hamming Code in Steganography Jannah, Nurul; Hamid, Nur
Journal Focus Action of Research Mathematic (Factor M) Vol. 6 No. 2 (2023)
Publisher : IAIN Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30762/f_m.v6i2.1678

Abstract

Data security needs to be considered to avoid noise when sending data or data breaches by hackers. In this article, we implement data security using a combination of coding theory and steganography. The code used is an extended Hamming code [8.4]. The media used is a grayscale image of size  of lengths 50,100,150,200,250 and 300 characters with 6 attempts. In addition, we show the PSNR result obtained and also the computation time.
Terwilliger Algebras of Group Association Schemes of Matrix Groups Hamid, Nur
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol 11, No 1 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24775401.v11i1.21470

Abstract

This paper investigates the Terwilliger algebras of some group association schemes related to matrix groups. We obtain the structure of the Terwilliger algebras for the general and the special linear group of 2 × 2 matrices over the field of order 5. In particular, we determine the Wedderburn decomposition of these algebras.
Co-Authors Adi Sukma Afni Restasari Andi Rusnaenah Cahyu Guswita Cahyu Guswita Leonard Marpaung M. Faiz Nailun Ni'am Muhammad Faiz Nailun Ni'am Nurul Jannah Rahmawati Sukma Saiful Islam Saiful Islam Silviana Qomariyah Siti Fatimah Siti Khoifah