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All Journal Jurnal Mahasiswa Matematika AKSIOMA Jurnal Matematika: MANTIK Jurnal Matematika Sains dan Teknologi Jurnal SOLMA Mathvision : Jurnal Matematika Jurnal Abdi Insani MATHunesa: Jurnal Ilmiah Matematika KARANGAN Journal Jurnal Matematika dan Sains (JMS) Jurnal Pendidikan MIPA
Ahmad Khairul Umam
Politeknik Elektronika Negeri Surabaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Physics Other

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BEBERAPA GENERALISASI TEOREMA TITIK TETAP CARISTI UNTUK JARAK-ω Ahmad Khairul Umam; Pukky Tetralian Bantining Ngastiti; Ahmad Isro'il
MathVisioN Vol 6 No 2 (2024): September 2024
Publisher : Prodi Matematika FMIPA Unirow Tuban

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55719/mv.v6i2.1280

Abstract

Caristi’s fixed point theorem is generalization of Banach’s fixed point. Banach’s fixed point theorem guarantee existence and uniqueness fixed point in complete space and contractive function. Caristi’s fixed point uses function f:X→X and lower semicontinuous function ψ:X→[0,∞). In this paper, we discuss some generalization of Caristi’s fixed point theorem. We also use ω-distance as distance function. We discuss function T:X→2^X where 2^X are collection of all nonempty subsets of X. And then we use function c:[0,∞)→(0,∞) that is nondecreasing function.
PERBANDINGAN TRANSFORMASI WAVELET DISKRIT UNTUK DENOISING CITRA MENGGUNAKAN VISUSHRINK, BAYESSHRINK, DAN NORMALSHRINK Umam, Ahmad Khairul; Ngastiti, Pukky Tetralian Bantining; Isro'il, Ahmad; Wahyuni, Zuanita May Tri; Alfiani, Faradillah Siska
MATHunesa: Jurnal Ilmiah Matematika Vol. 12 No. 2 (2024)
Publisher : Universitas Negeri Surabaya

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Abstract

Wavelet topics can be applied for image denoising. Wavelet transform is divided into discrete wavelet transform and continuous wavelet transform. Discrete wavelet transform is useful for image denoising, image compression, etc. In this research, we discuss image denoising using wavelets with hard thresholding and soft thresholding. We will also compare results of image denoising using VisuShrink, BayesShrink, and NormalShrink in determining threshold value. In this research, we use grayscale test image with size pixels. To measure algorithm, peak signal to noise ratio (PSNR) value is used. Image denoising uses hard thresholding: PSNR values of Haar, Daubechies 7, and biorthogonal 3.5 wavelets are same for three methods (VisuShrink, BayesShrink, NormalShrink). PSNR value of symlets 11 wavelet is highest for VisuShrink and NormalShrink methods. Whereas, PSNR value of coiflets 3 wavelet is highest for VisuShrink method. Fastest computing times of Haar, Daubechies 7, biorthogonal 3.5, and symlets 11 wavelets are for VisuShrink method. Whereas, fastest computing time of coiflets 3 wavelet is for NormalShrink method. Image denoising using soft threshoding: PSNR values of Haar, Daubechies 7, biorthogonal 3.5, and coiflets 3 wavelets are same for three methods (VisuShrink, BayesShrink, NormalShrink). Whereas, PSNR value of symlets 11 wavelet is highest for VisuShrink and BayesShrink methods. Fastest computing times of all wavelets (Haar, Daubechies 7, biorthogonal 3.5, symlets 11, and coiflets 3) are for NormalShrink method.
TRANSFORMASI WAVELET DISKRIT UNTUK DENOISING CITRA Umam, Ahmad Khairul; Ngastiti, Pukky Tetralian Bantining; Alfan, Aris; Shahadah, Zaqiyatus; Muamalah, Amanda Fatma
MATHunesa: Jurnal Ilmiah Matematika Vol. 12 No. 2 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/mathunesa.v12n2.p374-380

Abstract

Nowadays, topic of wavelet has many applications including image denoising. Wavelet Transform is divided into discrete wavelet transform and continuous wavelet transform. Besides for image denoising, it can also useful for image compression and others. In this research is discussed about steps image denoising using wavelet. Wavelets that used are Haar, Daubechies, biorthogonal, symlets and coiflets wavelets for hard thresholding and soft thresholding. Program is made according to steps/algorithm that were created. Then, we compare original image and result of image denoising. In this research, we use grayscale test image Lena and cat with size pixels. We use peak signal to noise ratio (PSNR) to measure performance of the algorithm. We also compare computational time.
KAJIAN TEOREMA TITIK TETAP DI RUANG B-METRIK YANG DIPERPANJANG Umam, Ahmad Khairul; Alfan, Aris; Isro'il, Ahmad; Shahadah, Zaqiyatus; Muamalah, Amanda Fatma
MATHunesa: Jurnal Ilmiah Matematika Vol. 12 No. 2 (2024)
Publisher : Universitas Negeri Surabaya

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Abstract

This research gives more explaination in proof of theorem. The theorem is about existence and uniqueness a point is called fixed point in an extended b-metric space. Beside that, also we give example about extended b-metric space.
EKSISTENSI DAN KETUNGGALAN TITIK TETAP HARDY DI RUANG B-METRIK LENGKAP Ahmad Khairul Umam; Pukky Tetralian Bantining Ngastiti; Krisna Adilia Daniswara; Zaqiyatus Shahadah; Amanda Fatma Muamalah
MathVisioN Vol 7 No 1 (2025): Maret 2025
Publisher : Prodi Matematika FMIPA Unirow Tuban

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55719/mv.v7i1.1496

Abstract

The fixed point is useful not only to solve problems in linear equation and differential equation, but also integral equation. The fixed point theorem of Hardy is generalization of the fixed point theorem of Reich. The metric space can be generalized to other spaces. b-metric space is one of generalization of metric space. Axiom of triangle inequality in metric space is not the same as axiom of triangle inequality in b-metric space. In this research, we discuss about fixed point theorem of Hardy in metric space. Besides that, we also discuss about fixed point of Hardy in complete b-metric space. Before proving that theorem, we prove lemma that supports the proof of theorem. We prove not only existance, but also uniqueness of fixed point from a function defined in complete b-metric space.
PERBANDINGAN TRANSFORMASI WAVELET DISKRIT DAN TRANSFORMASI WAVELET STASIONER UNTUK DENOISING CITRA Ahmad Khairul Umam; Irma Wulandari; Agung Teguh Setyadi; Hasnah Aulia Zahra; Khansa Nadhif Shafa
MATHunesa: Jurnal Ilmiah Matematika Vol. 13 No. 2 (2025)
Publisher : Universitas Negeri Surabaya

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Abstract

The wavelet transform is an improvement of the Fourier transform. Discrete Wavelet Transform (DWT) and Stationary Wavelet Transform (SWT) are part of the wavelet transform. DWT and SWT can be used to reduce noise in images. In this research, DWT and SWT methods are compared for image denoising process. The PSNR value and computation time for level 1 and 2 wavelets are compared. A grayscale test image of Lena and the cat measuring 512×512 pixels are used. We use Haar, Daubechies, biorthogonal, symlets, and coiflets wavelets. From this research results, the highest PSNR value is for the SWT method. As for the fastest computation time, it is all for DWT method.
PERBANDINGAN LEVEL 1 DAN 2 TRANSFORMASI WAVELET DISKRIT UNTUK DENOISING CITRA Umam, Ahmad Khairul; Nirwana Haidar Hari; Joko Prasetyo; Richa Latifatin Nisa'; Elisa Dwi Aprilia
MATHunesa: Jurnal Ilmiah Matematika Vol. 13 No. 2 (2025)
Publisher : Universitas Negeri Surabaya

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Abstract

The wavelet transform is an improvement of the Fourier transform. The Fourier transform changes the domain from the signal domain to the frequency domain, while the wavelet transform changes the signal domain to the scale (dilation) and translation domains. Discrete wavelet transformation (DWT) can be used to reduce noise in images. In this study, level 1 and 2 DWT methods for image denoising are compared. Lena and Mandrill grayscale test images of 512×512 pixels were used. The wavelets used are Haar, symlets, biorthogonal, coiflets, and Daubechies wavelets. We compare the PSNR value and computation time for Lena and Mandrill images using DWT level 1 and 2. From the research results, the highest PSNR values are for DWT level 2. As for the fastest computation times, they are for DWT level 1.
Using Augmented Reality-Based e-Book for Improving Students’ Learning Motivation in Analytical Geometry Course Ngastiti, Pukky Tetralian Bantining; Umam, Ahmad Khairul; Alfan, Aris
Jurnal Pendidikan MIPA Vol 23, No 2 (2022): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

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Abstract

In the development of science and technology in the world of education, students need to be introduced to a variety of varied learning media, one of which is the use of augmented reality-based e-books. The ability to learn analytic geometry requires systematic, logical and critical thinking that can be developed through learning. The purpose of this study is to test the increase in learning motivation using augmented reality based e-book media in analytic geometry course. The method in this study using ADDIE which consists of five stages which include analysis, design, development, implementation and evaluation. The result of the research is that the average result of the questionnaire given by students from various aspects of the assessment is 86%. Meanwhile, based on learning outcomes, there is a difference in learning outcomes between midterm exam score and the e-book score, which is 9.18 and based on the results of the analysis using SPSS on the t-test, it is found that tcount = 4.768 > ttable = 2.015. From these results, it can be concluded that augmented reality-based e-book media in analytic geometry courses can motivate students as a technology based learning medium for students of mathematics study program at Universitas Billfath. Keywords: augmented reality, geometry analytic, e-book DOI: http://dx.doi.org/10.23960/jpmipa/v23i2.pp486-495
PEMANFAATAN PYTHON DASAR BAGI CIVITAS AKADEMIKA UNIVERSITAS BILLFATH Yaqin, Ainul; Anggita, Sharazita Dyah; Umam, Ahmad Khairul; Daniswara, Krisna Adilia
Jurnal Abdi Insani Vol 11 No 1 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i1.1342

Abstract

In an increasingly advanced digital era, academic institutions around the world face large amounts of data that can be used to improve performance effectiveness. Through Data Science, data types, assumptions and analysis will be visible using one of the languages that is considered easy to learn, namely Python. The aim of this activity is to provide education and training to the Billfath University academic community regarding the use of Data Science using the Python programming language. This community service activity was carried out with an online webinar Introduction to Basic Python for Beginners. The webinar that will be held will discuss the basics of using tools using Jupyter for participants. Based on the priority problems found, activities were carried out to educate the Billfath University academic community about the importance of implementing data science in their respective fields of study. The basic material provided includes how to install and run the tools. The various libraries contained in it are also explained. Other basic materials provided are Data Profiling, Data Scaling, Data Correlation, Data Visualization and Training. The feedback given by the participants was quite positive as evidenced by the enthusiasm in the question and answer session accounting for more than 25% of the total participants. Community service activities in the form of a Python Training Webinar for Beginners were able to educate the Billfath University academic community about the importance of implementing data science in their respective fields of study. In the future, it is hoped that Billfath University will be able to increase the skills of its resources in the field of data science by holding more technical workshops for participants.
Optimasi Identitas Visual Empu Keris melalui Totem signage untuk Meningkatkan Daya Tarik Desa Wisata Keris Aeng Tong Tong Sumenep Putra, Deni Fardiansyah; Hujairi, Ahmad Walid; Umam, Ahmad Khairul; Prasetyo, Joko; Hari, Nirwana Haidar; Agustien, Lusiana; Khoironi, Khoironi; Kurli, Anis
Jurnal SOLMA Vol. 14 No. 3 (2025)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v14i3.20135

Abstract

Background: Aeng Tong-Tong Village in Sumenep Regency is widely recognized as a center for traditional kris craftsmanship. It is the only area in Indonesia with the largest number of kris masters (Empu), with approximately 600 practitioners officially acknowledged by UNESCO. Despite this cultural richness, the village still lacks a well-developed visual identity and information system, particularly in aspects such as directional signage, visual branding, and overall appeal to tourists and visitors. This community engagement initiative aims to design, enhance, and implement a strong visual identity for the Empu Keris, serving both as a means of cultural preservation and promotional media. Method: Methodology: The activities were carried out through several stages, including workshops on preservation and conservation techniques, digital marketing and visual promotion training, and a cultural festival culminating in the official unveiling of totem signage. These efforts were specifically directed at Through a strategic and collaborative design process, the program successfully produced visual elements that function as distinctive markers, helping visitors easily identify the kris artisans and masters in Aeng Tong-Tong Village. Conclusion: The installation of kris-shaped totem signage in Aeng Tong-Tong serves as a meaningful step toward strengthening the village’s visual identity as a cultural tourism destination, while actively preserving and honoring the ancestral heritage of the Indonesian archipelago.
Co-Authors Agung Teguh Setyadi Agustien, Lusiana Ahmad Isro'il Ahmad Isro'il Ahmad Isroil Ahmad Walid Hujairi Ainul Yaqin Alfan, Aris Alfiani, Faradillah Siska Amanda Fatma Muamalah Amanda Fatma Muamalah Anggita, Sharazita Dyah Anis Kurli, Anis Aris Alfan Daniswara, Krisna Adilia Elisa Dwi Aprilia Hari, Nirwana Haidar Hasnah Aulia Zahra Imro’atun Najiyah Indah Saniatur Rohma Irma Wulandari Isro'il, Ahmad Joko Prasetyo Joko Prasetyo Khansa Nadhif Shafa Khoironi, Khoironi Krisna Adilia Daniswara Krisna Adilia Daniswara Muamalah, Amanda Fatma Nihaya Alivia C. Dewi Pukky Tetralian B. N. Pukky Tetralian Bantining Ngastiti Pukky Tetralian Bantining Ngastiti Putra, Deni Fardiansyah Richa Latifatin Nisa' Shahadah, Zaqiyatus Supriyanto Wahyuni, Zuanita May Tri Zaqiyatus Shahadah Zaqiyatus Shahadah