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All Journal Statistika Jurnal Infinity Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam EurekaMatika (Jurnal Online Matematika S1) Kubik Prosiding SI MaNIs (Seminar Nasional Integrasi Matematika dan Nilai-Nilai Islami) Jurnal Penelitian Sains Jurnal Pendidikan (Teori dan Praktik) Jurnal Cendekia : Jurnal Pendidikan Matematika Majalah Ilmiah Matematika dan Statistika (MIMS) KUBIK: Jurnal Publikasi Ilmiah Matematika ABDI MOESTOPO: Jurnal Pengabdian pada Masyarakat These proceedings represent the work of researchers participating in The International Conference on Elementary Education (ICEE) which is being hosted by the Elementary Education Study Programme School of Postgraduate Studies, Universitas Pendidikan Jurnal Eurekamatika JP (Jurnal Pendidikan) : Teori dan Praktik Indonesian Journal of Applied Mathematics JIPI (Jurnal IPA dan Pembelajaran IPA) JMT (Jurnal Matematika dan Terapan) Jurnal Infinity
Dewi Rachmatin
Universtitas Pendidikan Indonesia
Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Physics Social Sciences Other

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APLIKASI METODE-METODE AGGLOMERATIVE DALAM ANALISIS KLASTER PADA DATA TINGKAT POLUSI UDARA Dewi Rachmatin
Jurnal Infinity Vol 3 No 2 (2014): Jurnal Infinity Vol 3 No. 2 September 2014
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v3i2.p133-149

Abstract

ABSTRAK Analisis Klaster merupakan analisis pengelompokkan data yang mengelompokkan data berdasarkan informasi yang ditemukan pada data. Tujuan dari analisis klaster adalah agar objek-objek di dalam satu kelompok memiliki kesamaan satu sama lain sedangkan dengan objek-objek yang berbeda kelompok memiliki perbedaan. Analisis klaster dibagi menjadi dua metode yaitu metode hirarki dan metode non-hirarki. Metode hirarki dibagi menjadi dua, yaitu metode agglomerative (pemusatan) dan metode divisive (penyebaran). Metode-metode yang termasuk dalam metode agglomerative adalah Single Linkage Method, Complete Linkage Method, Average Linkage Method, Ward’s Method, Centroid Method dan Median Method. Pada artikel ini dibahas metode-metode agglomerative tersebut yang diterapkan pada data tingkat polusi udara. Masing-masing metode tersebut memberikan jumlah klaster yang berbeda. Kata Kunci : Analisis Klaster, Single Linkage Method, Complete Linkage Method, Average Linkage Method, Ward’s Method, Centroid Method dan Median Method.  ABSTRACTCluster analysis is an analysis of the data classification based on information found in the data.The objective of cluster analysis is that the objects in the group have in common with each other, while the different objects have different groups. Cluster analysis is divided into two methods : the method of non-hierarchical and hierarchical methods.Hierarchical method is divided into two methods, namely agglomerative methods (concentration) and divisive methods (deployment). The methods included in the agglomerative method is Single Linkage Method, Complete Linkage Method, Average Linkage Method, Ward 's Method, Method and Median Centroid Method. In this article discussed the agglomerative methods were applied to the data rate of air pollution. Each of these methods provides a different number of clusters. Keywords: Cluster Analysis , Single Linkage Method, Complete Linkage Method, Average Linkage Method, Ward 's Method, Method and Median Centroid Method.
Implementasi Kombinasi Secret Sharing dan Steganografi Citra Least Significant Bit dengan QR Code Marwati, Rini; Pebriani, Dwi Putri; Rachmatin, Dewi
Indonesian Journal of Applied Mathematics Vol. 5 No. 1 (2025): Indonesian Journal of Applied Mathematics Vol. 5 No. 1 April Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/indojam.v5i1.1887

Abstract

Information security becomes very important as long as information technology continues to develop. This research combines Shamir Secret Sharing (Scheme ( , )) cryptography and Least Significant Bit (LSB) steganography to improve information security in the aspect of confidentiality. The need to collect a minimum number of shares, Scheme ( , ) method makes it more difficult for hackers to reconstruct the message. The implementation of the combination of cryptography and steganography produces an application program created with Python programming languange version 3.11.2, where the Scheme (t,w) used is and RGB image as the cover object of LSB method. In determining the location of image pixels that will be inserted into the message, random numbers generated by the Linear Congruential Generator (LCG) algorithm is used. The program can create a share of text messages with a maximum of 8 characters contained in ASCII characters 32 to 126. The result obtained from the share construction program is QR codes that refers to the stego image that has been inserted by the share, so that the existence of information in the QR code is difficult to know. The program can also reconstruct the message back from QR codes.
Improving Students' Sustainable Environmental Awareness Using the Read-Answer-Discuss-Explain-Create Learning Model with Greenhouse Effect Animation Video: A Stacking Analysis Sujana*, Atep; Ramadany, Lisa Dewi; Hidayat, Febrian Andi; Rachmatin, Dewi; Yunus, Sitti Rahma
Jurnal IPA & Pembelajaran IPA Vol 9, No 3 (2025): SEPTEMBER 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jipi.v9i3.48165

Abstract

Despite increasing global attention to environmental issues, many elementary school students still lack adequate awareness and understanding of sustainable environmental practices. This low level of awareness poses a significant challenge to achieving long-term environmental sustainability, as early education plays a critical role in shaping pro-environmental attitudes and behaviors. This study aims to examine the effect of RADEC learning model assisted by greenhouse effect animation video on improving elementary school students' sustainable environmental awareness. Using a quasi-experimental design and pretest-posttest approach, data were collected through tests measured by logit scores before and after the intervention, which included aspects of knowledge, attitudes, behaviors, and practices related to the environment. The analysis technique used was Rasch analysis with the stacking method to evaluate changes in students' environmental awareness. The results showed that the RADEC learning model with the greenhouse effect animation video successfully improved students' sustainable environmental awareness in all measured dimensions, especially in the emotional, attitudinal and behavioral, and practice dimensions. In contrast, the control class using conventional learning showed only limited improvement, with some students even experiencing a decline in ability. These findings suggest that the use of visual media and an inquiry-based approach in RADEC is more effective in improving students' environmental awareness compared to traditional learning. Therefore, this study makes an important contribution to the development of inquiry-based learning methods and visual media in sustainability education in primary schools
Seminar Multimedia Interaktif Tim Dosen Multimedia dan Mahasiswa untuk Guru Matematika Sudihartinih, Eyus; Purniati, Tia; Marwati, Rini; Rachmatin, Dewi; Usdiyana, Dian; Muftiyah, Salma; Sari, Asyifa Anggun; Fophin, Theodore Dwivaland; Novianingsih, Khusnul; Haryanto, Dwi
ABDI MOESTOPO: Jurnal Pengabdian Pada Masyarakat Vol 7, No 2 (2024): Juli 2024
Publisher : Universitas Prof. Dr. Moestopo (Beragama)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32509/abdimoestopo.v7i2.4231

Abstract

Tujuan penulisan artikel ini yaitu untuk mendeskripsikan kegiatan PkM berjudul Seminar Multimedia Interaktif untuk Guru Matematika. PkM ini menggunakan model pelatihan Goad, yaitu 1) analisis kebutuhan pelatihan, 2) desain pendekatan pelatihan, 3) pengembangan materi pelatihan, 4) pelaksanaan pelatihan, dan 5) evaluasi dan pemutakhiran pelatihan. Bentuk kegiatan PkM ini, yaitu seminar untuk guru matematika SMP di Kota Bandung dan implementasi pada siswa kelas VIII. Tempat pelaksanaan PkM adalah SMP LabSchool UPI dan Program studi Pendidikan Matematika Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam di Universitas Pendidikan Indonesia. Instrumen yang digunakan pada seminar dalam rangka PkM ini adalah angket guru. PkM telah dilakukan melalui implementasi media pembelajaran Scratch pada siswa kelas 8 SMP dan seminar dengan 6 buah pengembangan materi, yakni Scratch, Google Form, model-model pembelajaran, Kahoot, Quizizz, dan Liveworksheets yang diikuti oleh kurang lebih 100 peserta. Hasil dari PkM ini, yaitu kegiatan berjalan baik dan bermanfaat bagi guru matematika serta diharapkan dapat diadakan secara rutin. Dengan demikian, perlunya program lanjutan untuk meningkatkan pengetahuan dan keterampilan guru.
Co-Authors Anisa Bella Fathia, Anisa Bella Atep Sujana Azzahra, Khairunnisa Aulia Budhiprameswari, Tania Dianda Desya Salwa Ramadhianti Dian Usdiyana Diva, Destiara Rahma Dwi Haryanto Elah Nurlaelah Entit puspita Eyus Sudihartinih Febrian Andi Hidayat Fitriani agustina Fophin, Theodore Dwivaland Gita Alfa, Alodya Ann Gita Novita Hafizha, Zahra Ridha Hakim, Rakhmat Nurul Herhyanto, Nar Husty Serviana Husain Ilyas, Isti Agustia Indra Hardiyana, Indra Indriany Rahayu Jarnawi Afgani Dahlan Jarnawi Afgani Dahlan Khusnul Novianingsih Lukman Lukman Muftiyah, Salma Nar Herrhyanto Pebriani, Dwi Putri Rahman, Dany Ramadany, Lisa Dewi Rini Marwati Sabila, Salma Salsabila Ayu Pratiwi Sari, Asyifa Anggun Sekar Wilujeng Sihombing, Rika Elizabet Siti Kania Sujana*, Atep Tia Purniati Titia Ningsih Yukeu S Febriani Yunus, Sitti Rahma