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All Journal Journal on Education MAJU : Jurnal Ilmiah Pendidikan Matematika JOURNAL OF SCIENCE AND SOCIAL RESEARCH Majalah Ilmiah Warta Dharmawangsa Genta Mulia : Jurnal Ilmiah Pendidikan Best Journal (Biology Education, Sains and Technology) Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Abdidas Jurnal Scientia Journal Mathematics Education Sigma [JMES] ELIPS: Jurnal Pendidikan Matematika Indo-MathEdu Intellectuals Journal Journal Of Human And Education (JAHE) Educate: Journal of Community Service in Education Jurnal MathEducation Nusantara Journal Liaison Academia and Society Hanif Journal of Information Systems
Rizka Fahruza Siregar
Universitas Pembinaan Masyarakat Indonesia
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Application of Fuzzy C-Means Algorithm for Clustering Customers Oktaviana Nirmala Purba; Dian Novianti Sitompul; Tua Holomoan Harahap; Sri Rahmah Dewi Saragih; Rizka Fahruza Siregar
Hanif Journal of Information Systems Vol. 1 No. 1 (2023): August Edition
Publisher : Ilmu Bersama Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56211/hanif.v1i1.8

Abstract

Today's fierce business competition requires companies to focus on the needs desired by consumers.This makes companies have to think about how to manage customer data so that it can be utilized properly for the development of marketing strategies.And Grouping (cluster) customers based on their respective characteristics can be an alternative in solving these problems.In clustering (cluster) customers there are several data mining clustering methods that can be used, one of which is the Fuzzy C-Means (FCM) method. FCM is a clustering algorithm where one object can be a member of several clusters and FCM cluster boundaries are vague. The output of FCM is a row of cluster centers and several degrees of membership for each data point. In this clustering, customers will be divided into 4 customer clusters namely Golden, Silver, Bronze, and Iron with the variables used as a reference are the final purchase date, purchase frequency and total purchase. The data used is customer transaction data for the period September - December 2015. The total data is 709 transactions from 75 customers. After the data is processed with the Fuzzy C-Means method, the final results show that the iteration ends at the 30th iteration with a change in the objective function of 9.8. The resulting customer clusters are Golden: 27, Silver: 15, and Bronze: 33 with a cluster validity of 0.596277.
Analisis Pengaruh Mata Kuliah Statistik Untuk Penelitian Tugas Akhir Mahasiswa Rini Ramadhani; Rizka Fahruza Siregar; Hetty Elfina
Journal on Education Vol 6 No 2 (2024): Journal on Education: Volume 6 Nomor 2 Tahun 2024
Publisher : Departement of Mathematics Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joe.v6i2.5293

Abstract

This research aims to analyze whether or not there is an influence of statistics courses on final assignment research in the sharia accounting department. The sampling technique used was a purposive sampling technique with the population being study syariah accounting at the North Sumatra State Islamic University (UINSU). This research uses a quantitative research method with primary data in the form of a questionnaire. Hypothesis testing uses simple linear regression analysis techniques. So the results obtained in the research show, with a significance level of 0.000 <0.05, (probability) meaning that the Statistics Subject has a significant effect on the final assignment research student university..
Implementasi Kegiatan Projek Penguatan Profil Pelajar Pancasila (P5) pada Kurikulum Merdeka dalam Mencegah Perilaku Bullying Pelajar di SMKN 6 Medan Ramadhani, Rini; Siregar, Rizka Fahruza; Elfina, Hetty
Indo-MathEdu Intellectuals Journal Vol. 5 No. 4 (2024): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v5i4.1721

Abstract

Bullying is one of the serious problems in the world, where it can damage the physical and mental well-being of the parties involved. The problem of bullying cannot be ignored, especially in a school environment where at those ages a person is experiencing growth that is very important for their future. Prevention of bullying can also be done through activities in schools, one of which is the Pancasila Student Strengthening Project (P5) program. This research was conducted by describing findings in the field related to P5 activities in preventing bullying behavior. This research is descriptive research with a qualitative approach. Data collection through socialization (workshops), field observations, provision of diagnostic and formative assessments, and in-depth interviews with informants of research objects. Data analysis is carried out in stages of data reduction, data presentation, and conclusion drawing. Build their mind and body to be able to provide information about bullying so that participants can respond wisely in the future. The methods used are socialization (workshop), observation, discussion, brainstorming, challenges and project benefits. The selection of students at vocational schools as the object of research is due to the rampant bullying of students in schools
Pelatihan Penggunaan Autograph Pada Materi Program Linier Di Mas Plus Al Ulum Medan Elfina, Hetty; Muthawali, Dede Ibrahim; Marito, Winanda; Ramadhani, Rini; Siregar, Rizka Fahruza; Riani, Nova
Journal Of Human And Education (JAHE) Vol. 5 No. 1 (2025): Journal of Human And Education (JAHE)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jh.v5i1.2215

Abstract

Matematika merupakan pelajaran yang membosankan di kelas jika tidak menggunakan media pembelajaran berbasis teknologi. Maka diperlukan suatu aplikasi pembelajaran yang mendukung siswa dalam belajar, salah satunya adalah aplikasi autograph. Autograph merupakan aplikasi khusus yang dikembangkan untuk pembelajaran matematika. Saat pelatihan berlangsung, siswa diberi kebebasan untuk mencoba berbagai sistem pertidaksamaan, mengamati gambar grafik, memperhatikan arah arsiran, dan bagaimana memperoleh titik potong yang terbentuk dari dua garis atau lebih. Metode yang dilakukan dalam pelatihan ini adalah metode praktik langsung dan pendampingan. Berdasarkan hasil tes setelah dilakukan pelatihan, diperoleh 82% siswa mampu menggunakan aplikasi autograph. Hasil angket diperoleh data 85,3% menyatakan bahwa pelatihan penggunaan aplikasi autograph sangat bagus untuk pembelajaran di kelas. Pelatihan ini memberikan pengalaman baru bagi siswa dalam belajar matematika dan mempermudah siswa dalam memahami konsep materi yang diajarkan.
PENGARUH PEMBELAJARAN BERBASIS MASALAH BERBANTUAN MODUL DIGITAL TRIGONOMETRI DALAM MENINGKATKAN KEMAMPUAN LITERASI MATEMATIK DAN MINAT BELAJAR Purba, Oktaviana Nirmala; Mapilindo, Mapilindo; Nasution, Atikah Rahmah; Siregar, Rizka Fahruza
JOURNAL OF SCIENCE AND SOCIAL RESEARCH Vol 8, No 1 (2025): February 2025
Publisher : Smart Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54314/jssr.v8i1.2720

Abstract

Abstract: This research aims to identify the increase in students' mathematical literacy skills and interest in learning after using problem-based learning assisted by digital trigonometry modules, as well as to see the interaction between problem-based learning assisted by digital trigonometry modules and gender on increasing students' mathematical literacy abilities and interest in learning. This research is a quasiexperimental research with a research sample of 69 students with class X-4 as many as 34 students as the experimental class and class X-3 as many as 35 students as the control class. The data obtained from this research are pretest and posttest data on students' mathematical literacy abilities and a questionnaire on students' learning interest. The instruments used to collect this data were tests of students' mathematical literacy skills and interest in learning. The collected data was then analyzed using two-way ANOVA in the SPSS program. Based on the results of data analysis, it was found that the increase in mathematical literacy skills and interest in learning for students who received problem-based learning assisted by digital trigonometry modules was higher than the increase in mathematical literacy skills and interest in learning for students who received regular learning. There is no interaction between the problem-based learning model assisted by digital trigonometry modules and gender on increasing students' mathematical literacy skills and interest in learning. Keyword: Gander, Mathematical Literacy, Interest in Learning, Digital Trigonometry Module, Problem Based Learning. Abstrak: Penelitian ini bertujuan untuk mengidentifikasi peningkatan kemampuan literasi matematik dan minat belajar siswa setelah menggunakan pembelajaran berbasis masalah berbantuan modul digital trigonometri, serta untuk melihat interaksi antara pembelajaran berbasis masalah berbantuan modul digital trigonometri dan gender terhadap peningkatan kemampuan literasi matematik dan minat belajar siswa. Penelitian ini merupakan penelitian eksperimen semu dengan sampel penelitian sebanyak 69 siswa dengan kelas X-4 sebanyak 34 siswa sebagai kelas eksperimen dan kelas X-3 sebanyak 35 siswa sebagai kelas kontrol. Data yang diperoleh dari penelitian ini adalah data pretest dan posttest kemampuan literasi matematik siswa dan angket minat belajar siswa. Instrumen yang digunakan untuk mengumpulkan data tersebut adalah tes kemampuan literasi matematik dan minat belajar siswa. Data yang dikumpulkan tersebut kemudian dianalisis dengan menggunakan anava dua jalur pada program SPSS. Berdasarkan hasil analisis data diperoleh bahwa peningkatan kemampuan literasi matematik dan minat belajar siswa yang mendapat pembelajaran berbasis masalah berbantuan modul digital trigonometri lebih tinggi daripada peningkatan kemampuan literasi matematik dan minat belajar siswa yang mendapat pembelajaran biasa. Tidak terdapat interaksi antara model pembelajaran berbasis masalah berbantuan modul digital trigonometri dan gender terhadap peningkatan kemampuan literasi matematik dan minat belajar siswa. Kata kunci: Gander, Literasi Matematik, Minat Belajar, Modul Digital Trigonometri, Pembelajaran Berbasis Masalah.
Pengaruh Aktivitas Diskusi Kelas Terhadap Kemampuan Penguasaan Materi Pembelajaran Statistik pada Mahasiswa Akuntansi Syariah Siregar, Rizka Fahruza; Ramadhani, Rini
Indo-MathEdu Intellectuals Journal Vol. 6 No. 1 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i1.2737

Abstract

This study aims to analyze the influence of classroom discussion activities on the ability to master statistical learning materials in sharia accounting students. The method used in this study is quantitative, with data collection through a questionnaire distributed to 19 respondents. The data analysis technique used is multiple linear regression. The results of the analysis showed that there was a significant positive relationship between class discussion activities and material mastery ability. This study indicates that the application of the discussion method can improve students' understanding of statistical materials, as well as encourage critical and analytical thinking skills. These findings make an important contribution to the development of more effective learning strategies in the academic environment.  
Pengaruh Peranan Kepemimpinan Dalam Peningkatan Kerja Pegawai Melalui Program Kesejahteraan Pegawai Dan Peningkatan Jabatan Pada Dinas Pencatatan Sipil Kabupaten Nias Barat Gulo, Wince Kristiany; Parinduri, Ramadha Yanti; Siregar, Rizka Fahruza
BEST Journal (Biology Education, Sains and Technology) Vol 7, No 2 (2024): September 2024
Publisher : Program Studi Pendidikan Biologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/best.v7i2.11031

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh peranan kepemimpinan dalam peningkatan kinerja pegawai melalui program kesejahteraan pegawai dan peningkatan jabatan pada Dinas Pencatatan Sipil Kabupaten Nias Barat. Metodologi yang digunakan adalah Penelitian kuantitatif. Analisis ini menggunakan variabel independen yaitu kepemimpinan, variabel dependen yaitu kesejahteraan pegawai dan peningkatan jabatan, variabel intervening yaitu kinerja pegawai. Sampel penelitian ini adalah seluruh pegawai yang bekerja pada Dinas Pencatatan Sipil Kabupaten Nias Barat. Sampel dilakukan dengan teknik sampling random. Pengumpulan data dilakukan dengan kuesioner disebarkan ke pegawai sebanyak 40 kuesioner. Metode analisis data menggunakan uji validitas, uji relibialitas, uji normalitas, uji t, uji F, dan uji koefesien determinasi. Hasil penelitian ini menunjukkan bahwa kepemimpinan secara signifikan positif mempengaruhi kinerja pegawai, kesejahteraan pegawai dan peningkatan jabatan, dengan nilai signifikan lebih kecil dari 0,05. Kontribusi variabel independen terhadap variabel dependen melalui variabel intervening adalah kuat
Hubungan Antara Tingkat Kehadiran dan Partisipasi Aktif Terhadap Minat Belajar Mahasiswa Akuntansi Syariah pada Mata Kuliah Statistika Siregar, Rizka Fahruza
Indo-MathEdu Intellectuals Journal Vol. 6 No. 3 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i3.3121

Abstract

The purpose of this study is to determine the relationship between attendance levels and active participation towards the interest and learning of students in Islamic accounting in the statistics course. This research is descriptive with a quantitative approach. Data collection was obtained through the completion of questionnaires given to respondents. Data analysis was conducted through data reduction, data presentation, and drawing conclusions. The results showed a significant relationship between attendance levels, active participation, and interest in learning in the statistics course. The higher the students' attendance in class, the greater their interest in learning. This indicates that regular and active student attendance in the teaching and learning process has a positive impact on their interest in learning
Pengaruh Mata Kuliah Statistik Terhadap Kualitas Penelitian Mahasiswa Tingkat Akhir Siregar, Rizka Fahruza; Rahim, Rani; Purba, Oktaviana Nirmala; Rizqi, Nur Rahmi; Azis, Zainal
Indo-MathEdu Intellectuals Journal Vol. 6 No. 4 (2025): Indo-MathEdu Intellectuals Journal
Publisher : Lembaga Intelektual Muda (LIM) Maluku

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54373/imeij.v6i4.3517

Abstract

Statistics is an important basic subject in data processing and analysis, especially for academic research. This course is the main foundation for students to develop analytical skills to produce quality research. This research evaluates the contribution of statistics courses to the quality of final year student research at the State Islamic University of North Sumatra. The method used is quantitative with descriptive statistical analysis to see the relationship between mastery of statistics and research quality. Data was obtained through a questionnaire. The analysis technique used is quantitative descriptive with statistical tests. The results show a significant positive correlation between mastery of statistics and research quality, especially in preparation of proposals, data analysis, and interpretation of results. Students with a good understanding of statistics tend to produce higher quality research. These findings emphasize the importance of quality statistics learning to increase student research success through enriching material and data analysis practices.
Pelatihan Penggunaan Aplikasi Mendeley bagi Mahasiswa dalam Penulisan Skripsi di UPMI Medan Marito, Winanda; Riani, Nova; Elfina, Hetty; Siregar, Rizka Fahruza; Ramadhani, Rini
Journal Liaison Academia and Society Vol 2, No 3 (2022): September 2022
Publisher : Lembaga Komunikasi dan Informasi Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (312.539 KB) | DOI: 10.58939/j-las.v2i3.333

Abstract

Penulisan skripsi merupakan salah satu persyaratan untuk mendapatkan gelar sarjana di Univesritas Pembinaan Masyarakat Indonesia (UPMI) Medan. Tujuan kegiatan ini memberikan pelatihan penulisan sitasi dan daftar pustaka bagi mahasiswa tingkat akhir dalam penulisan skripsi menggunakan aplikasi mendeley. Kegiatan ini dilakukan di Universitas Pembinaan Masyarakat Indonesia (UPMI) Medan. Metode yang dilakukan dalam kegiatan ini adalah mencakup ceramah variatif disertai dengan tutorial. Hasil dari kegiatan ini adalah berupa kemampuan mahasiswa dalam menulis sitasi dengan benar menggunkan aplikasi mendeley sehingga dapat menghindari plagiarism dalam penulisan skripsi, sebelumnya mahasiswa masih menulis sitasi dan daftar pustaka secara manual, plagiarism juga masih ditemukan pada skripsi. Dengan diberikan pelatiahan ini mahasiswa memiliki kemampuan menulis sitasi dan daftar pustaka dengan aplikasi mendeley. Kata Kunci: Pelatihan; Mendeley; Penulisan; Skripsi
Co-Authors Azis, Zainal Dian Novianti Sitompul Gulo, Wince Kristiany Hetty Elfina Karsim, Karsim MAPILINDO Marito, Winanda Muthawali, Dede Ibrahim Nasution, Asrindah Nasution, Atikah Rahmah Nova Riani Oktaviana Nirmala Purba Parinduri, Ramadha Yanti purba, oktaviana nirmala Rahim, Rani Ramadhani, Rini Rani Rahim Riani, Nova Rini Ramadhani Rini Ramadhani Sri Rahma Dewi Saragih St Rahmah Tua Holomoan Harahap Winanda Marito Yuan Anisa Z, Zahlimar