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All Journal Jurnal Statistika dan Matematika (Statmat) Jurnal Natural Jurnal Suara Pengabdian 45
Esther Ria Matulessy
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Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Mathematics Physics Social Sciences Other

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KAJIAN METODE FUZZY K-RATAAN DAN FUZZY K-MEDOIDS (STUDI KASUS: PENGELOMPOKAN DESA DI KABUPATEN SORONG TAHUN 2016 BERDASARKAN STATUS KETERTINGGALAN) Indah Ratih Anggriyani; Dariani Matualage; Esther Ria Matulessy
Jurnal Natural Vol. 14 No. 1 (2018)
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v14i1.3

Abstract

The developments research in the cluster analysis using the fuzzy method. The fuzzy method allocates to each group with membership value located at interval [0, 1], showing the magnitude of the possibility of an object being a member into a particular group. Outlier in data very important known before grouping, because affect the final result. Grouping by using the mean value as the center of the group will be more sensitive than using the median value, so this research applies fuzzy c-means and fuzzy c-medoid method to the grouping of villages in Sorong Regency Year 2016 based on the underdevelopment status and examine the goodness of both methods. There are 23.2% of villages that do not change when done grouping with both methods. Overall average distance of group center object and varians in the resulting group the two methods are the same, the varins between groups of fuzzy c-means is greater than the fuzzy c-medoid method.
Pendekatan Kreatif dalam Meningkatkan Kemampuan Numerasi dan Membaca Anak di Pondok Baca Senja Papua Cerdas Manokwari Randa, Trigarcia Maleachi; Loria Amisah Lubis; Esther Ria Matulessy; Chrisaria Palungan; Dahlia Gladiola Rurina Menufandu; Rium Hilum
Jurnal Suara Pengabdian 45 Vol. 4 No. 4 (2025): Desember: Jurnal Suara Pengabdian 45
Publisher : LPPM Universitas 17 Agustus 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/32mtwd41

Abstract

Penelitian ini bertujuan untuk mengetahui efektivitas pendekatan kreatif dalam meningkatkan kemampuan numerasi, membaca, dan menulis anak di Pondok Baca Senja Papua Cerdas, Manokwari. Sasaran kegiatan adalah anak-anak usia sekolah dasar dan prasekolah yang aktif mengikuti kegiatan belajar di pondok baca tersebut. Metode yang digunakan adalah pendekatan kreatif melalui aktivitas bermain sambil belajar, media visual interaktif, serta kegiatan membaca dan menulis bersama yang menyenangkan. Data dikumpulkan melalui observasi langsung, catatan kegiatan, dan dokumentasi aktivitas belajar. Hasil pengabdian menunjukkan peningkatan kemampuan numerasi, membaca, dan menulis anak serta antusiasme yang lebih tinggi dalam mengikuti kegiatan. Temuan ini menunjukkan bahwa pendekatan kreatif efektif mendukung perkembangan numerasi dan literasi anak secara simultan.
Clinic of Mathematics with the PPLAM Approach: Efforts to Improve Students’ Mathematics Learning in Manokwari Lubis, Loria Amisah; Trigarcia Maleachi Randa; Esther Ria Matulessy; Chrisaria Palungan; Dahlia Gladiola Rurina Menufandu
STATMAT : JURNAL STATISTIKA DAN MATEMATIKA Vol 8 No 1 (2026)
Publisher : Department of Mathematics, Faculty of Mathematics and Natural Sciences, Universitas Pamulang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/sm.v8i1.54979

Abstract

This study aims to analyze the effectiveness of the Mathematics Clinic in overcoming the difficulties of seventh-grade junior high school students in integer operations. The research focused on improving students’ learning outcomes through a short learning intervention consisting of a pretest, structured practice, and a posttest conducted within a single day. The method employed was a quasi-experimental design with a one-group pretest–posttest dengan Embedded Learning Analytics (PPLAM). The subjects were 25 seventh-grade students purposively selected based on their identified difficulties in learning mathematics. Data were collected through achievement tests (pretest and posttest) and students’ practice records. The data analysis included a paired t-test to measure the difference between pretest and posttest scores, the calculation of Normalized Gain (N-Gain) to assess the effectiveness of improvement, and effect size to determine the magnitude of the intervention’s impact. In addition, a simple learning analytics approach was applied to examine the relationship between practice quality and posttest results. The findings revealed a significant improvement in students’ learning outcomes with . The mean N-Gain score of 0.578 indicated a medium level of improvement, while the effect size (Cohen’s d = 2.164) was categorized as very large. Furthermore, learning analytics analysis showed an R2 = 0,70 suggesting that practice quality positively contributed to students’ posttest performance. It can be concluded that the Mathematics Clinic is effective as an alternative learning strategy to address difficulties in integer operations, even when implemented within a short time frame.
Co-Authors Chrisaria Palungan Dahlia Gladiola Rurina Menufandu Indah Ratih Anggriyani Loria Amisah Lubis Lubis, Loria Amisah Matualage, Dariani Rium Hilum Trigarcia Maleachi Randa Trigarcia Maleachi Randa