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All Journal Journal of the Indonesian Mathematical Society Jurnal Ilmiah Ekonomi Islam Magnetic: Research Journal of Physics and It’s Application Jurnal Pengabdian Pada Masyarakat METHABDI
Yumia, Mega
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Religion Agriculture, Biological Sciences & Forestry Astronomy Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Immunology & microbiology Languange, Linguistic, Communication & Media Mathematics Medicine & Pharmacology Physics Public Health Social Sciences

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Analisis Variasi Spasial dan Temporal Parameter Kualitas Air Sungai Kahayan: Implikasi Terhadap Proses Self-Purification Ayu, Regina Wahyudyah Sonata; Basani, Yuniarta; Adelia, Kadek Ayu Cintya; Yumia, Mega
Magnetic: Research Journal of Physics and It’s Application Vol. 5 No. 1 (2025): Magnetic: Research Journal of Physics and It’s Application
Publisher : Program Studi Fisika - Universitas San Pedro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59632/magnetic.v5i1.491

Abstract

Sungai Kahayan, sebagai salah satu sungai utama di Kalimantan Tengah, memiliki peran krusial dalam kehidupan masyarakat setempat. Namun, aktivitas manusia di sekitar sungai ini, seperti pembuangan limbah rumah tangga dan industri, mengakibatkan potensi pencemaran yang signifikan. Penelitian ini menggali variasi spasial dan temporal dari 11 parameter kualitas air Sungai Kahayan selama periode 2021–2023. Hasil analisis menggunakan teknik statistika multivariat,  Analisis Klaster Hierarki (HCA) dan Analisis Komponen Utama (PCA), mengidentifikasi hubungan kompleks antar parameter. Hasil PCA menunjukkan bahwa parameter kualitas air dapat direduksi menjadi dua komponen utama (PC1 dan PC2), menjelaskan sekitar 84,24% variabilitas data. PC1 merepresentasikan tingkat polusi organik dan anorganik, sementara PC2 mencerminkan aspek-aspek kimia dan keseimbangan kimia dalam air. Analisis spasial menggunakan HCA mengelompokkan lokasi pengambilan sampel ke dalam dua klaster utama, menunjukkan perbedaan signifikan dalam kualitas air. Analisis temporal menggunakan MANOVA mengungkapkan perbedaan yang signifikan setiap tahun, terutama pada parameter pH, DO, BOD, NH3-N, TDS, TSS, dan Fe. Kemampuan self-purification Sungai Kahayan dievaluasi melalui analisis tren dengan melibatkan parameter DO, BOD, dan COD. Meskipun terjadi pemurnian diri, sungai belum mencapai zona air bersih pada titik terakhir pengambilan sampel. Penelitian ini memberikan pemahaman mendalam tentang variasi spasial dan temporal kualitas air Sungai Kahayan, serta implikasinya terhadap proses self-purification. Hasilnya dapat menjadi dasar untuk pengelolaan sumber daya air yang berkelanjutan dan peningkatan pemahaman terhadap kondisi ekosistem sungai.
Sosialisasi Profesi Aktuaris: Referensi Karir Prospektif Yang Menjanjikan bagi Siswa SMA/SMK Wilayah Kota Palangka Raya Basani, Yuniarta; Ayu, Regina Wahyudyah Sonata; Monita, Dita; Afli, Febrianto; Puspitorini, Mega; Yumia, Mega; Arsana, Mu’afa Purwa; Wilda, Robiatul Witari
Jurnal Pengabdian Pada Masyarakat METHABDI Vol 4 No 1 (2024): Jurnal Pengabdian Pada Masyarakat METHABDI
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/methabdi.Vol4No1.pp81-84

Abstract

This profession operates in the insurance sector which has risk management expertise and is needed at this time. The method used is outreach to teachers and high school students in Palangka Raya. The socialization of the actuary profession aims to increase knowledge of the actuarial profession and introduce actuaries as a field of study in mathematics study programs so that it becomes an inspiration for choosing a study program when continuing to college. Through this service activity, there is an increase in understanding of the actuarial profession and job opportunities for an actuary by lecturers from the Mathematics Study Program with the team from the Center for Financial Professional Development, Ministry of Finance of the Republic of Indonesia.
Sosialisasi Profesi Aktuaris: Referensi Karir Prospektif Yang Menjanjikan bagi Siswa SMA/SMK Wilayah Kota Palangka Raya Basani, Yuniarta; Ayu, Regina Wahyudyah Sonata; Monita, Dita; Afli, Febrianto; Puspitorini, Mega; Yumia, Mega; Arsana, Mu’afa Purwa; Wilda, Robiatul Witari
Jurnal Pengabdian Pada Masyarakat METHABDI Vol 4 No 1 (2024): Jurnal Pengabdian Pada Masyarakat METHABDI
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/methabdi.Vol4No1.pp81-84

Abstract

This profession operates in the insurance sector which has risk management expertise and is needed at this time. The method used is outreach to teachers and high school students in Palangka Raya. The socialization of the actuary profession aims to increase knowledge of the actuarial profession and introduce actuaries as a field of study in mathematics study programs so that it becomes an inspiration for choosing a study program when continuing to college. Through this service activity, there is an increase in understanding of the actuarial profession and job opportunities for an actuary by lecturers from the Mathematics Study Program with the team from the Center for Financial Professional Development, Ministry of Finance of the Republic of Indonesia.
Analisis Variasi Spasial dan Temporal Parameter Kualitas Air Sungai Kahayan: Implikasi Terhadap Proses Self-Purification Ayu, Regina Wahyudyah Sonata; Basani, Yuniarta; Adelia, Kadek Ayu Cintya; Yumia, Mega
Magnetic: Research Journal of Physics and It’s Application Vol. 5 No. 1 (2025): Magnetic: Research Journal of Physics and It’s Application
Publisher : Program Studi Fisika - Universitas San Pedro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59632/magnetic.v5i1.491

Abstract

Sungai Kahayan, sebagai salah satu sungai utama di Kalimantan Tengah, memiliki peran krusial dalam kehidupan masyarakat setempat. Namun, aktivitas manusia di sekitar sungai ini, seperti pembuangan limbah rumah tangga dan industri, mengakibatkan potensi pencemaran yang signifikan. Penelitian ini menggali variasi spasial dan temporal dari 11 parameter kualitas air Sungai Kahayan selama periode 2021–2023. Hasil analisis menggunakan teknik statistika multivariat,  Analisis Klaster Hierarki (HCA) dan Analisis Komponen Utama (PCA), mengidentifikasi hubungan kompleks antar parameter. Hasil PCA menunjukkan bahwa parameter kualitas air dapat direduksi menjadi dua komponen utama (PC1 dan PC2), menjelaskan sekitar 84,24% variabilitas data. PC1 merepresentasikan tingkat polusi organik dan anorganik, sementara PC2 mencerminkan aspek-aspek kimia dan keseimbangan kimia dalam air. Analisis spasial menggunakan HCA mengelompokkan lokasi pengambilan sampel ke dalam dua klaster utama, menunjukkan perbedaan signifikan dalam kualitas air. Analisis temporal menggunakan MANOVA mengungkapkan perbedaan yang signifikan setiap tahun, terutama pada parameter pH, DO, BOD, NH3-N, TDS, TSS, dan Fe. Kemampuan self-purification Sungai Kahayan dievaluasi melalui analisis tren dengan melibatkan parameter DO, BOD, dan COD. Meskipun terjadi pemurnian diri, sungai belum mencapai zona air bersih pada titik terakhir pengambilan sampel. Penelitian ini memberikan pemahaman mendalam tentang variasi spasial dan temporal kualitas air Sungai Kahayan, serta implikasinya terhadap proses self-purification. Hasilnya dapat menjadi dasar untuk pengelolaan sumber daya air yang berkelanjutan dan peningkatan pemahaman terhadap kondisi ekosistem sungai.
Optimal Control of HIV/AIDS Epidemics: Integrating Media Awareness and Antiviral Treatment Ayu, Regina Wahyudyah Sonata; Wilda, Robiatul Witari; Rizka, Sailah Ar; Yumia, Mega; Afli, Febrianto
Journal of the Indonesian Mathematical Society Vol. 31 No. 4 (2025): DECEMBER
Publisher : IndoMS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jims.v31i4.1918

Abstract

This paper investigates an optimal control strategy to mitigate the spread of HIV/AIDS by integrating media awareness campaigns and antiviral treatment efforts. A modified SI-type model is developed, dividing the population into five subgroups: unaware susceptible individuals, aware susceptible individuals, unaware infected individuals, aware infected individuals, and individuals undergoing treatment. Additionally, a separate compartment representing the level of media awareness is included to model the dynamics of awareness campaigns over time. Three control variables are introduced: the success of media awareness programs aimed at reducing contact between susceptible and infected individuals and encouraging infected individuals to seek and receive treatment; the effort to provide antiretroviral treatment; and the effort to strengthen the intensity of media awareness programs. The objective is to minimize the number of unaware susceptible and infected individuals while maximizing the number of individuals receiving treatment, and to reduce implementation costs. The model employs optimal control theory to identify the best combination of strategies by minimizing a cost functional. Numerical simulations explore seven control strategy combinations, ranging from single to multiple controls. The results indicate that combining all control variables yields the most significant reduction in unaware and infected individuals, a substantial increase in the number of individuals receiving treatment, and effective minimization of costs.
Analisis Proyeksi Harapan Lama Sekolah dalam Perspektif Maslahah: Studi Komputasi Grey GM(1,1) di Kota Palangka Raya Desmita, Zulya; Afli, Febrianto; Wilda, Robiatul Witari; Yumia, Mega
Jurnal Ilmiah Ekonomi Islam Vol. 12 No. 2 (2026): Jurnal Ilmiah Ekonomi Islam
Publisher : ITB AAS INDONESIA Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/jiei.v12i2.19644

Abstract

This research aims to analyze and project the direction of human capital accumulation in Palangka Raya City through the School Expectancy Length (SEL) indicator. Within the framework of Islamic economics, human capital accumulation is viewed as a fundamental instrument for achieving maslahah through the reinforcement of intellectual capacity (Hifdz al-Aql). This study employs a descriptive quantitative approach using secondary time-series data from the Central Bureau of Statistics for the period 2010–2025. Data analysis was conducted using the mathematical modeling of the Grey Forecasting Model GM(1,1), which is superior in predicting trends with limited data without relying on strict statistical distribution assumptions. The results indicate that this model has a very high level of accuracy with a Mean Absolute Percentage Error (MAPE) of 0.865%. Based on the projection results, the School Expectancy Length in Palangka Raya City is predicted to continue rising, reaching 15.47 years by 2030. Substantively, these findings confirm a consistent expansion of human capital, where the future school-age population is projected to be capable of attaining a Bachelor's degree level of education. The implications of this study emphasize the importance of policy synchronization between enhancing human resource capacity and providing strategic employment opportunities to ensure inclusive and sustainable economic welfare in Palangka Raya City.
Co-Authors Afli, Febrianto Arsana, Mu’afa Purwa Ayu, Regina Wahyudyah Sonata Basani, Yuniarta Desmita, Zulya Kadek Ayu Cintya Adelia Monita, Dita Puspitorini, Mega Regina Wahyudyah Sonata Ayu Rizka, Sailah Ar Wilda, Robiatul Witari