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All Journal Media Statistika Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) Jurnal Sains Matematika dan Statistika BAREKENG: Jurnal Ilmu Matematika dan Terapan JTAM (Jurnal Teori dan Aplikasi Matematika) Zeta - Math Journal QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT International Journal of Engineering, Science and Information Technology Indonesian Journal of Education Methods Development Dirgamaya: Jurnal Manajemen dan Sistem Informasi Kajian Moral dan Kewarganegaraan Madani: Multidisciplinary Scientific Journal Karimah Tauhid Indonesian Culture and Religion Issues JIPSD Progressus Humanitatis Limits: Journal of Mathematics and Its Applications
Dita Amelia, Dita
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Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences Transportation Other

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Reduksi Faktor-Faktor yang Mempengaruhi Kualitas Air Hujan dengan Metode Analisis Komponen Utama Nitasari, Alfi Nur; Salsabila, Fatiha Nadia; Ramadhanty, Devira Thania; Anggriawan, Muhammad Rizal; Amelia, Dita; Mardianto, M. Fariz Fadillah; Ana, Elly
Zeta - Math Journal Vol 8 No 1 (2023): Mei
Publisher : Universitas Islam Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31102/zeta.2023.8.1.7-15

Abstract

The increase in air pollution that occurs due to industrial and economic activities will affect the rainwater content. The vital function of one of the sources of clean, namely rainwater, makes the urgency of research on indications of a decrease in rainwater quality by analyzing the substances contained. The parameters used for the determination of rainwater quality are the degree of acidity, conductivity, calcium, magnesium, sodium, potassium, ammonium, sulfate ions, nitrate ions, chloride ions, total hardness, and acidity. The data source used is data from the Central Statistics Agency (BPS) entitled "Indonesian Environmental Statistics 2022". By using the main component analysis method to reduce the variables of rainwater quality influence factors in 35 city/station samples in Indonesia, results were obtained, namely rainwater quality influence factors that can be formed into three main components with each containing 10 variables consisting of acidity, conductivity, magnesium, sodium, potassium, chloride ions, sulfate ions, nitrate ions, total hardness, and acidity capable of explaining 73.695% of the total variance.
Kolaborasi Guru dan Orang Tua untuk Inovasi Pendidikan Berkualitas di Sekolah Dasar Amelia, Dita; Yuliani, Salma
JIPSD Vol. 1 No. 1 (2024): Jurnal Inovasi Pengajaran Sekolah Dasar (Agustus 2024)
Publisher : Konsorsium Pengetahuan Innoscientia (KOPINNOS)

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Abstract

Penelitian ini bertujuan mengeksplorasi kolaborasi antara guru dan orang tua dalam mendukung inovasi pendidikan berkualitas di SDN 16 Tanjungpandan. Penelitian menggunakan pendekatan kualitatif dengan jenis deskriptif, melibatkan guru sebagai subjek utama. Data dikumpulkan melalui wawancara yang memfokuskan pada komunikasi, bentuk kerja sama, dan dampaknya terhadap pendidikan. Hasil penelitian menunjukkan bahwa kolaborasi diwujudkan melalui paguyuban kelas, diskusi perencanaan pembelajaran, dan partisipasi aktif orang tua dalam kegiatan sekolah. Kolaborasi ini memberikan dampak positif pada perkembangan akademik dan karakter siswa, meskipun terdapat kendala seperti keterbatasan waktu dan komunikasi. Rekomendasi penelitian mencakup penguatan komunikasi, pemanfaatan teknologi, dan pengembangan strategi inovatif untuk meningkatkan keterlibatan orang tua. Penelitian ini diharapkan dapat memberikan kontribusi nyata bagi pengembangan pendidikan dasar di wilayah lokal.
Pengaruh Komunikasi dan Motivasi Kerja Terhadap Kinerja Karyawan Pada PT. Ayara Beauty Indonesia Kabupaten Bogor Amelia, Dita; Kusjono, Gatot
Progressus Humanitatis Vol 1 No 1 (2025): Progressus Humanitatis
Publisher : Yayasan Berkah Abadi Mulia Bersama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70285/y72hcr65

Abstract

Tujuan penelitian ini adalah untuk mengetahui pengaruh Komunikasi dan Motivasi kerja terhadap Kinerja Karyawan PT Ayara Beauty Indonesia Kabupaten Bogor. Hasil penelitian Komunikasi berpengaruh signifikan terhadap Kinerja Karyawan dengan persamaan regresi Y= 13.864 + 0,655 X1 nilai korelasi sebesar 0,938 artinya kedua variabel memiliki hubungan yang sangat kuat, koefisien determinasi sebesar 87,9% dan uji hipotesis diperoleh t hitung > t tabel (6.306 > 2,002). Dengan demikian Ho ditolak dan H1 diterima artinya terdapat pengaruh signifikan antara Komunikasi terhadap Kinerja Karyawan. Motivasi kerja berpengaruh signifikan terhadap Kinerja Karyawan dengan persamaan regresi Y = 17,145 + 0,479 X2, nilai korelasi sebesar 0,959 artinya kedua variabel memiliki hubungan yang sangat kuat dengan koefisien determinasi sebesar 79,7% dan uji hipotesis diperoleh t hitung > t tabel (0,959 > 2,002). Dengan demikian Ho diterima dan H2 ditolak artinya tidak terdapat pengaruh signifikan antara Motivasi Kerja terhadap Kinerja Karyawan. Komunikasi dan Motivasi Kerja berpengaruh signifikan terhadap Kinerja Karyawan dengan persamaan regresi Y= 13,926 + 0,573 X1 + 0,067 X2, nilai korelasi sebesar 0,939 artinya kedua variabel memiliki hubungan yang kuat dengan koefisien determinasi sebesar 88,1%. Uji hipotesis diperoleh nilai F hitung > F tabel atau (207,441 > 3,16). Dengan demikian Ho ditolak dan H3 diterima. Hal ini berarti Komunikasi dan Motivasi Kerja secara simultan berpengaruh signifikan terhadap Kinerja Karyawan PT Ayara Beauty Indonesia Kabupaten Bogor.
Analisis Survival Distribusi Lomax dengan Estimasi Maximum Likelihood Alexandra, Victoria Anggia; Prastyaningrum, Aprilia; Kurniawan, Ardi; Amelia, Dita
Limits: Journal of Mathematics and Its Applications Vol. 22 No. 1 (2025): Limits: Journal of Mathematics and Its Applications Volume 22 Nomor 1 Edisi Ma
Publisher : Pusat Publikasi Ilmiah LPPM Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/limits.v22i1.3373

Abstract

Survival analysis is a statistical technique used to test the durability and reliability of a component. Life time data obtained from a life test experiment is often in the form of type III censored data, which occurs when observations enter at different times and last for varying durations. In survival analysis, data is expected to follow a certain probability distribution. To determine the characteristics of a population, a point estimate of the probability distribution parameters is conducted. This study aims to obtain parameter estimators of the Lomax distribution on type III censored data with the Maximum Likelihood Estimation (MLE) and Newton Raphson methods. Application of parameter estimation results on post-heart surgery survival data in one of the Jakarta hospitals. The result of estimating the parameter value in the post-heart surgery patient data is 1.552 and the result of estimating the parameter in the post-heart surgery patient data is 20.38. Based on these results, it can be concluded that the estimated probability of survival of a post-heart surgery patient for more than 49 days is 14.94%.
Pengaruh Suplementasi Vitamin D dan BMI terhadap LVEF dengan Pendekatan Generalized Additive Models Longitudinal Amelia, Dita; Suliyanto, Suliyanto; Alexandra, Victoria Anggia; Yosifa, Adelia Frielady; Rakhma , Syavrilia Alfiatur; Julianto, Agnes Happy
Limits: Journal of Mathematics and Its Applications Vol. 22 No. 1 (2025): Limits: Journal of Mathematics and Its Applications Volume 22 Nomor 1 Edisi Ma
Publisher : Pusat Publikasi Ilmiah LPPM Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/limits.v22i1.3378

Abstract

Cardiovascular diseases (CVD) are the leading cause of global mortality, with Left Ventricular Ejection Fraction (LVEF) being a key indicator of heart function. This study explores the impact of vitamin D supplementation and Body Mass Index (BMI) on LVEF using Generalized Additive Models (GAM) in longitudinal data from 47 elderly patients with hypovitaminosis D undergoing orthopedic surgery. LVEF was measured before surgery and at 1, 3, and 6 months post-intervention. GAM was employed to capture nonlinear relationships between variables with working correlation structures such as Independence, Exchangeable, Unstructured, and Autoregressive-1 (AR-1). The findings revealed a significant increase in vitamin D levels and LVEF following supplementation, while BMI remained relatively stable throughout the observation period. The best GAM model with AR-1 correlation structure achieved the lowest Quasi Information Criterion (QIC) score of 443.47, indicating a complex relationship between vitamin D and LVEF and a linear relationship between BMI and LVEF. Vitamin D demonstrated a significant nonlinear effect on LVEF improvement, whereas a 1-point increase in BMI raised LVEF by 0.291%. This study underscores the importance of vitamin D supplementation in enhancing heart function among elderly patients with hypovitaminosis D, supporting the development of evidence-based health policies
MODELING OF WORLD CRUDE OIL PRICE BASED ON PULSE FUNCTION INTERVENTION ANALYSIS APPROACH Aliffia, Netha; Sediono, Sediono; Suliyanto, Suliyanto; Mardianto, M. Fariz Fadillah; Amelia, Dita
MEDIA STATISTIKA Vol 16, No 2 (2023): Media Statistika
Publisher : Department of Statistics, Faculty of Science and Mathematics, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/medstat.16.2.136-147

Abstract

Crude oil has important role in global economy, including Indonesia with considerable dependence on crude oil energy consumption. The increase in crude oil prices can be triggered by several factors, one of which is geopolitical conflict that occurred due to Russia's invasion of Ukraine on February 24, 2022. As the result, world crude oil prices rose above US$100 per barrel for the first time since 2014. Therefore, this study uses pulse function intervention analysis approach to evaluate the impact of certain events in predicting data over the next few periods. The pulse function is used because the intervention occurs at the moment t only. The data used starts from June 8, 2020 to September 19, 2022 on weekly basis with the proportion of training and testing data is 90:10. The best intervention model obtained is ARIMA (3,2,0) with b=0, s=1, r=2, and intervention point at T=91. The prediction results for the next 12 periods obtained MAPE value of 2.8982% and MSE of 10.2687. This study is expected to help reduce risks due to uncertainty in world crude oil prices and in line with the goals of the Sustainable Development Goals (SDGs) to ensure access to reliable, sustainable, and affordable energy.
Co-Authors Abidin, Qumadha Zaenal Aisyah, Arlisya Shafwan Alexandra, Victoria Anggia Aliffia, Netha Anggriawan, Muhammad Rizal Apit Priatna Ardi Kurniawan Arif Maulana Yusuf Asfar Muniir, Asfar Awaludin, Dudi Azzahra, Shakilla Dahlan Abdullah Darmawan, Kezia Eunike Dewi, Berlianti Alisa Dimas Pratomo Dwitya, Shabrina Nareswari Elly Ana Evelyn, Jennifer Faizah, Atikah Fatyra, Adisa Fauziah, Nathania Febriani, Regina Firmanda, Ahmad Wahyu Fitria Eka Wulandari Fitriyani, Mubadi’ul Handayani, Nida Nabilah Harsanti, Dwika Maya Indrasta, Irma Ayu Ismunandar Julianto, Agnes Happy Kalista, Yovita Karin Kamil, M. Aqil Zaidan Khairunnisa, Nur Shabrina Kusjono, Gatot Larasati, Berliani M. Fariz Fadillah Mardianto Marisa Rifada Mediani, Andini Putri Mustika Kartika Sari Nafaisah, Lulu Nitasari, Alfi Nur Nugraha, Galuh Cahya Nur Chamidah Prasetyo, Juan Krisfigo Prastyaningrum, Aprilia Pratiwi, Rosidun Nindyo Putra, Mochamad Rasyid Aditya Putri, Riski Dwi Rahma, Alma Khalisa Rahmah , Ade Rakhma , Syavrilia Alfiatur Ramadhanty, Devira Thania Raya, Kezya Bato Salsabila, Fatiha Nadia salsabila, safira Sa’idah, Andini Sediono, Sediono Septia Sari, Ni Wayan Widya Septiandini, Niswah Sesrita, Afridha Setyaningrum, Jeny Praesti Shabira , Syahla Malika Shabira, Syahla Malika Soewignjo, Steven Sri Utami, Irma Inesia Suliyanto Suliyanto Suyono, Billy Christandy Syahfitri, Nabila Syahputra, Bimo Okta Tantry Widiyanarti, Tantry Taufiqur Rahman Teguh Prasetyo Toha Saifudin Uljanah, Lulu Urbach, Verina Widiyanti, Julia Wijayawati, Evi Yosifa, Adelia Frielady Yuliani, Salma Zah, Alfian Iqbal Zahratul Fitri, Zahratul Zuleika, Talitha