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Rakhmawati, Fibri

Universitas Islam Negeri Sumatera Utara, Indonesia

Author-ID : 3455827

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Estimation of Logistic Regression Model on The Risk of Acute Respiratory Infection Toddlers at Cikampak Torgamba Public Health Center Using The Maximum Likelihood Method Sari, Dian Maya; Rakhmawati, Fibri; Cipta, Hendra
MAJAMATH: Jurnal Matematika dan Pendidikan Matematika Vol. 5 No. 1 (2022): Vol. 5 No. 1 Maret 2022
Publisher : Prodi Pendidikan matematika Universitas Islam Majapahit (UNIM), Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamath.v5i1.1762

According to the World Health Organization (WHO), the incidence of Acute Respiratory Infections (ARI) in the world by number of toddler who died achieve ± 13 million each year. Researchers will estimate the model equations logistic regression using maximum likelihood. The purpose of this study was to determine the logistic regression model against respiratory infection in infants and the test results of the method of maximum likelihood against respiratory infection in infants in the health center Cikampak Torgamba. Logistic regression Model against the toddler obtained results that the model to be used and the test results of the method of maximum likelihood that the model is significant.

SURVIVAL ANALYSIS WITH WEIBULL REGRESSION ON THE RATE OF HEALING OF DIABETES MELLITUS PATIENTS Widya Wahyu Cahyani; Fibri Rakhmawati
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 9 No 2 (2025): January
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v9i2.6490

Survival analysis is a statistical technique used to study survival related to time, starting from the initial time of the study that has been determined until the end time of the study, therefore the purpose of this study was to determine the equation of the Weibull regression model of the clinical condition of patients with diabetes mellitus at the Malahayati Islamic Hospital Medan and what factors affect the rate of recovery of the clinical condition of patients with diabetes mellitus. The type of research used in this paper is Applied Research, from data collection and analysis, the results are obtained based on the Kaplan-Meier curve, visually it can be seen that the longer the coronary heart disease patient recovers (t). the less likely they are not to recover until time t. The Kolmogorov-Smirnov test was used to test the Weibull distribution, which describes the survival time of patients with diabetes mellitus. The partial test results indicate that the variables of gender, age, hyperglycemia, hypertension, and complications significantly impact the model. The following is how the Weibull regression model for the recovery time data of patients with diabetes mellitus was acquired for this study: S (t|x) = exp (-exp (1.42219+ (-0.01018)x1 + 0.03942x2 + (-0.02976)x3 + (-0.01887)x4 ) t ) α

Implementation Of Dynamic Program In Determining The Optimum Path In The Distribution Of Pertamina Chemical & Agrochemical Lubricating Oil With Forward Recursive Equation PT.Pola Raya Jaya Sakti Uswatun Hasanah Nasution; Fibri Rakhmawati
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 9 No 2 (2025): January
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v9i2.6494

Pola Raya Jaya Sakti is a company engaged in the distribution of Pertamina Kimia & Agrochemical Lubricants. In its operations, this company is faced with the challenge of determining the optimum route in the lubricant oil distribution process in order to optimize production efficiency and reduce production costs. Based on research using a dynamic program with a Forward Recursive Equation, namely A → C → D → E → H → I → K → L → N → O → Q → R → S, where the sequence of locations is Jln. Sampali Road No 151 → Jln. Kesuma → Jln.Letda Sujono → Jln. Padang → Jln. Panglima Denai → Flyover Amplas → Tanjung Morawa → Lubuk Pakam → Tebing Tinggi → Ring Road Lima Puluh → Jln.Perintis Kemerdekaaan → Simpang Kawasan Ekonomi Khusus KEK Sei Mangkei → PT. Unilever Oleochemical Indonesia. The total distance is A+ C + E + H + I + L + N + O + Q + R = 0 + 8.5 km + 7.3 km + 4.4 km + 13 km + 70 km + 50 km + 16 km + 9.5 km+ 3 km = 181.7 km.

Impact of Project-Based Learning on Mathematical Communication and Critical Thinking Skills in Grade VII Statistics Learning Rizka Tri Andini; Fibri Rakhmawati
Journal of General Education and Humanities Vol. 4 No. 4 (2025): November
Publisher : MASI Mandiri Edukasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58421/gehu.v4i4.801

This study addresses the challenge of low levels of mathematical communication and critical thinking among students, often stemming from the widespread use of traditional, teacher-centred instructional methods. The objective of this research is to examine the impact of the Project-Based Learning (PjBL) model on seventh-grade students' mathematical communication and critical thinking skills in statistics. A quasi-experimental design with a Nonequivalent Control Group was applied. Participants included 35 students in the experimental group (Class VII-3, using PjBL) and 35 students in the control group (Class VII-5, using conventional methods) at MTs Al-Jam'iyatul Washliyah Tembung. Data was collected using tests for critical thinking and observation sheets for mathematical communication skills. The results showed significantly higher average scores in the experimental group compared to the control group for both skills. Specifically, the mean scores for mathematical communication were 88.05 (experimental) versus 48.84 (control), and for critical thinking were 74 (experimental) versus 50.28 (control). The Independent-Samples t-Test confirmed significant differences (Sig. 2-tailed = 0.000 < 0.05) for both skills, while ANOVA (F = 43.634, Sig. = 0.000 < 0.05) further confirmed PjBL's significant positive effect on learning outcomes. These findings demonstrate that the Project-Based Learning (PjBL) model is effective in enhancing students' mathematical communication and critical thinking skills.

Ethnomathematical Expolarization of The Portibi Temple Building in North Padang Lawas Regency Mega Utami Hasibuan; Fibri Rakhmawati
Journal of Mathematics Instruction, Social Research and Opinion Vol. 4 No. 3 (2025): September
Publisher : MASI Mandiri Edukasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58421/misro.v4i3.683

This study explores ethnomathematics in the architecture of the Portibi Temple in North Padang Lawas Regency to reveal the relationship between geometric concepts and the symbolic meaning of Hindu-Buddhist culture. A qualitative approach using observation, interviews, and documentation was used to identify mathematical elements in the temple structure. The results show the presence of a cube-shaped solid on the main body of the temple, symbolizing the stability of human life and the connection between the earth and the sky; a cylinder on the roof representing the continuity of life; beams on the stairs and the base of the temple as symbols of sturdiness; and a rectangular pyramid in the interior, reflecting the relationship between humans and the spiritual world. In addition, the rectangular and trapezoidal solid shapes emphasise the principles of proportionality and balance. These findings demonstrate that the geometric forms in the temple serve not only structural functions but are also rich in philosophical values. The implication is that Portibi Temple can be used as an ethnomathematics-based learning resource that links abstract concepts with the local cultural context, thereby making mathematics learning more concrete, meaningful, and fostering students' appreciation of cultural heritage.

Riemann Integral In Minicraft Village Area Calculation With Geogebra Fibri Rakhmawati; Muhammad Fahri Akmal; Nur Nabilah Yusuf Br Nasution
JTMT: Journal Tadris Matematika Vol 7 No 1 (2026): Volume 7, Issue 1, June 2026
Publisher : Universitas Islam Ahmad Dahlan (UIAD)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47435/jtmt.v7i1.4470

This study aims to model and estimate the area of a village in the game Minecraft through a Riemann-sum representation. The research employs a descriptive mathematical modeling approach focusing on a specific village area within the game environment. Spatial data were obtained by collecting the coordinates of boundary blocks, which were then mapped into a Cartesian coordinate system. The modeling and visualization process was carried out using GeoGebra to produce a two-dimensional representation of the analyzed region. The area calculation was performed through the summation of rectangular elements over partitioned intervals. Mathematically, for each fixed value of (y), the horizontal interval length is represented by (L(y)), while the area contribution at each partition is expressed as with ( ) representing the unit height of one block layer. The total area of the region is then approximated using the Riemann-sum formulation For each fixed value of (y), overlapping or adjacent (x)-intervals were first merged, and the interval lengths were multiplied by unit height to obtain the area contribution at each level. The resulting model produced an estimated village area of 232 square units ((m^2) equivalent). This study demonstrates how spatial data from block-based digital environments can be transformed into coordinate-based mathematical representations and analyzed systematically using mathematical modeling techniques. The findings also illustrate that discrete spatial structures in digital games can be interpreted through the concept of Riemann sums for area approximation. However, this study does not examine instructional effectiveness or student learning outcomes; therefore, any educational implications should be interpreted cautiously

PENGEMBANGAN STRATEGI BLENDED LEARNING BERBASIS CONTEXTUAL TEACHING AND LEARNING (CTL) Alfauzan Ramadhanny Simangunsong; Fibri Rakhmawati; Muhammad Nuh
AXIOM : Jurnal Pendidikan dan Matematika Vol 11, No 2 (2022)
Publisher : State Islamic University of North Sumatra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/axiom.v11i2.12593

Penelitian ini merupakan penelitian pengembangan dengan produk pengembangan berupa strategi Blended Learning berbasis Contextual Teaching And Learning (CTL). Prosedur penelitian mengacu pada desain penelitian pengembangan level 1 Sugiyono yaitu: (1) mencari potensi dan masalah, (2) studi literatur yang sejalan dengan pengumpulan informasi, (3) desain produk, (4) validasi desain, (5) desain teruji. Penelitian dilaksanakan di SMP Muhammadiah 61 Tanjung Selamat pada tahun ajaran 2021/2022. Validasi produk melibatkan ahli perangkat pembelajaran seperti RPP, buku panduan belajar dan buku panduan mengajar, ahli konten dan ahli desain instruksional. Keakuratan validasi di uji kepada responden sebagai pengguna produk pengembangan yang melibatkan siswa kelas IXA sebanyak 10 orang dan seorang guru matematika. Efektifitas pengembangan di uji kepada peserta didik dengan melihat hasil belajar siswa dan melibatkan kelas VIIIA sebanyak 30 orang. Berdasarkan hasil analisis yang dilakukan, mulai dari analisis validasi desain instruksional, konten, RPP, panduan belajar dan mengajar, desain dinyatakan valid. Validasi desain instruksional memperoleh poin rata-rata penilaian 4.38 dari skor rata-rata maksimal 5.00. Validasi konten memperoleh poin rata-rata penilaian 4.19 dari skor rata-rata maksimal 5.00. Validasi dan penilaian RPP memperoleh poin rata-rata penilaian 4.24 dari skor rata-rata maksimal 5.00. Validasi Panduan Belajar memperoleh poin rata-rata penilaian 4.59 dari skor rata-rata maksimal 5.00. Panduan Mengajar memperoleh poin rata-rata penilaian 4.35 dari skor rata-rata maksimal 5.00. Selanjutnya penilaian keterlaksanaan pembelajaran berdasarkan observasi yang dilakukan menunjukkan bahwa pembelajaran terlaksana dengan sangat baik. Pembelajaran juga dinilai layak berdasarkan respon pengguna dengan presentase 100% dan dari uji efektifitas menggunakan N-Gain memiliki efektifitas yang tinggi dengan N-Gain (%) bernilai 72.809.

Estimation of Logistic Regression Model on The Risk of Acute Respiratory Infection Toddlers at Cikampak Torgamba Public Health Center Using The Maximum Likelihood Method Dian Maya Sari; Fibri Rakhmawati; Hendra Cipta
MAJAMATH: Jurnal Matematika dan Pendidikan Matematika Vol. 5 No. 1 (2022): Vol. 5 No. 1 Maret 2022
Publisher : Prodi Pendidikan matematika Universitas Islam Majapahit (UNIM), Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamath.v5i1.1762

Optimasi Waktu dan Biaya Pembangunan Box Underpass Proyek Jalan Tol Ruas Sigli-Banda Aceh dengan Menggunakan Metode PERT dan EVM Muhammad Iqbal Fahri; Fibri Rakhmawati; Dedy Juliandri Panjaitan
MAJAMATH: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 1 (2024): Vol 7 No 1 Maret 2024
Publisher : Prodi Pendidikan matematika Universitas Islam Majapahit (UNIM), Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamath.v7i1.3166

Peningkatan efisiensi dalam proyek konstruksi infrastruktur jalan tol adalah suatu keharusan dalam upaya meminimalkan biaya dan mempercepat waktu penyelesaian. Tujuan dari penelitian ini untuk mengoptimalkan waktu dan biaya pembangunan Box Underpass dalam proyek jalan tol ruas Sigli-Banda Aceh dengan menggunakan Metode PERT (Program Evaluation and Review Technique) dan EVM (Earned Value Management). PeneIitian ini menggunakan jenis peneIitian terapan, jenis data yang digunakan adaIah data sekunder yang diambil dan dikumpulkan secara langsung dari tempat penelitian. Hasil peneIitian ini menunjukkan bahwa integrasi Metode PERT dan EVM dapat menghasilkan perencanaan yang lebih baik dan pengendalian yang lebih efektif terhadap waktu dan biaya proyek. Dengan pemantauan yang cermat dan analisis terus-menerus, proyek ini dapat diselesaikan lebih cepat dan dengan biaya yang Iebih efisien, sehingga memberikan manfaat signifikan bagi pemangku kepentingan proyek dan masyarakat yang akan menggunakan jalan tol ini. Proyek ini memiliki probabilitas sebesar 98,46% dengan estimasi waktu penyelesaian adalah 70 hari. Adapun perkiraan total biaya akhir proyek jika tren berkelanjutan adalah Rp 2.844.277.455.

ANALISIS PERSAINGAN E-COMMERCE MENGGUNAKAN METODE GAME THEORY DAN MARKOV CHAIN DALAM PENENTUAN STRATEGI PEMASARAN OPTIMAL Devy Rahmadani; Fibri Rakhmawati
KUBIK Vol 9 No 2 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Department of Mathematics, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i2.40273

Dalam dunia teknologi yang terus berkembang, penjualan barang melalui media sosial (e-commerce) sudah banyak dilakukan oleh banyak orang. Platform e-commerce telah menjadi bagian penting dalam perdagangan global. Penelitian ini bertujuan untuk menganalisis persaingan antara Shopee dan TikTok Shop menggunakan metode Game Theory dan Markov Chain guna menemukan strategi pemasaran yang optimal. Penelitian ini menggunakan pendekatan kuantitatif dengan pengumpulan data melalui kuesioner yang disebarkan kepada 82 responden di Kota Medan, Sumatera Utara. Analisis data yang digunakan pada penelitian ini menggunakan uji validitas dan uji reabilitas serta melihat nilai maksimum dan minimum dari data yang didapat. Hasil penelitian menunjukkan bahwa probabilitas pergeseran aplikasi Shopee meningkat selama empat minggu sebesar 0,78 (78%) dimana strategi optimalnya adalah voucher. Sebaliknya, TikTok Shop hanya mengalami peningkatan sebesar 0,22 (22%) dimana strategi optimal berupa promo. Penelitian ini menyimpulkan bahwa strategi pemasaran berbasis voucher dan promo dapat meningkatkan daya saing kedua platform, dengan implikasi signifikan bagi pengembangan strategi pemasaran berbasis data dalam e-commerce.

Co-Authors Abiy Muhanna Adawiyah Ritonga Ade Al Khairun Ni’mah Br. Sitorus Afri, Lisa Dwi Aisyah Aisyah Akbar, Sabila Ammamiarihta Ammamiarihta Ana Uzla Batubara Andhany, Ella Anggi Maulida Anggi Reviani Pulungan Anggini Hasanah Anggriany, Nabila Angraini, Rini Anjelina, Repina Aprillia, Rima Arianti, Mei Yunina Arifta, Ega Arini Arini Aslam, Fazri Asrianti, Maulidya Asrianti Asrun Dabutar Astuti, Safariah Aulia Herdiyanti Aulia Rahma Tambusai Azura, Fatma Mayzatul Batubara, Misbah Bella Syahrani Nasution Bella Syahrani Nasution Cahyani, Widya Wahyu Cellia Clara, Nur Dalimunthe, Sri Wahyuni Daulay, Lily Sardiani Dedy Juliandri Panjaitan Deva Rezky Ramadhani Devi Umi Solehah Devika Muhyar Ritonga Devy Rahmadani Dian Maya Sari Dian Maya Sari Ditta Arsyilviasari Dwi Agustin, Susan Dwi Ardy Dermawan Dwita Sari, Venny Eka Khairani Hasibuan Ella Budi Lestari Erdisyah Yusuf, Kinanti Eva Yuliani Fadhillah, Nurul Fakhraini Zahra Afifa Fakhrur Rozi Nasution Farhan, luthfi Fauza, Gita Dwi Fauziah Azzahra Fauziyyah, Sari Fetrisia Siregar Fikri Nur Ardiansyah Fitri Handayani Fitri Handayani Fitri Hidayah Friska Putri Ariyati Hasibuan, Eka Khairani hasibuan, Seri minta uba Hendra Cipta Heni Pujiastuti Huda Prasetya, Nurul Husnul Fadhillah Ika Milia Wahyuni Siregar Ika Regitami Siregar IMRAN SINAGA, ALI Indriyani Indriyani Irawan, Dandi Ismail Husein, Ismail Isnani Nurul Deva Isnanita, Nur Jumianti Ritonga Juwita, Jenni Kamalia, Lailatun Nur Kania Utari Khadijah Khadijah Khairul Annas, Muhammad Latifah Marhamah Harahap Lestari, Devi Tri Lili Anjar Wati Lubis, Nur Ainun Luthfi, Hannia Mangunsong, Elvira Yolanda Marwiyah, Masringgit Masganti Sit Masriah Nasution Maulidya Asrianti Maulidya Khairani Mega Utami Hasibuan Mei Yunina Arianti Mery Fittria Mery Fittria Mesiono, Mesiono Mhd Ikhsan Rifki Mhd. Siddik Sinaga Misbah Batubara Muhammad Fahri Akmal Muhammad Fery Prayoga Muhammad Husen Ritonga Muhammad Ilham Syahputra Muhammad Iqbal Fahri Muhammad Khairul Annas Muhammad Nuh Muhammad Reja Sinaga Muhammad Ridwan Muhammad Yasir Mukminah Mardiah Mutiara Amanda Nabilla, Sofia Nahar, Syamsu Nanda Maylany Akbar Nasution, Ainil Hafizha Nasution, Masriah Nasution, Pauziah Neliwati Neliwati Nenna Irsa Syahputri Nenna Irsa Syahputri Ningsih, Titik Ni’mah Br. Sitorus, Ade Al Khairun Nur Aini Tarigan Nur Lela Nur Leli Nur Nabilah Yusuf Br Nasution Nur Nasution, Wahyudin Nur Syahidah Ayu Nurhajizah, Nurhajizah Nurjanah Nurjanna Nurjanna Nurjannah Nasution Nurma Indah Sari Nurma Sari Nurmadani, Nurmadani Nurmawati Nurmawati Nurmawati Nurmawati Nursalum, Raisa NURUL QOMARIYAH Perli Pujiana Prayetno, Rafika Sari Puji Syahputri Putra, Fani Darmawan Putri Miranti Harahap Putri Rahma Novia Putri, Dinda Kusuma Rahmadani, Devy Rahmaini Rahmaini Rahmaini Rahmi, Yulia Rahmita, Nelly Ramadhani, Rika Rambe, Dwi Wahyuni Rambe, Muhammad Vikry Rezki Rambe, Siti Rahmi Rangkuti, Abriadi Rangkuti, Robiatul Adawiyah Rani Endriani Rani Nurisa Tanjung Ratri Nurfitriah Reflina Rhama Desvitha Sari Rima Aprilia Rima Aprilia Rima Aprilia Rina Filia Sari Rina Filia Sari Rina Filia Sari, Rina Filia Rina Widyasari Rina Widyasari Rini Ade Willana Riri Syafitri Lubis Ritonga, Devika Muhyar Ritonga, Muhammad Husen Rizka Tri Andini Rora Rizky Wandini RR. Ella Evrita Hestiandari Rully Rumaida Rusi Ulfa Hasanah Rustam Ruth Mayasari Simanjuntak Sabrina, Ladia safitri, yayang Sajaratud Dur Sajaratud Dur Sajaratud Dur Sajaratud Dur, Sajaratud Salasa Riana, Dwi Salminawati Sari Fauziyyah Sari, Atika Mayang Sari, Dinda Sekar Ayu Irawan Selly Madela Br Ginting Seprina, Dita Septia Handayani Silvia Harleni Simamora, Hasna Ulpa Ujiah Simangunsong, Alfauzan Ramadhanny Siregar, Ika Milia Wahyuni Siregar, Machrani Adi Putri Sit, Masganti Siti Chatijah Siti Maysarah Siti Nurhaliza Sri Fatimah Sri Wahyuni Sri Wahyuni Dalimunthe Suaibah Aslamiyah Harahap SULASTRI Surayya Aulia Susan Dwi Agustin Sutarman Sutarman Sutarman Sutarman Sutarman, Sutarman Syahfitri, Fadila Inka Syahfitri, Siska Diah Syahputra, Fakhri Ananda Syahputra, Mario Syamsu Nahar Syamsu Nahar Syamsu Nahar Syamsu Nahar Syaputri Batubara, Fauziyah Syilviani Syilviani Tambusai, Aulia Rahma Tanjung, Rani Nurisa Thoibah Thoibah titin anisa tanjung Trima Lestari Uswatun Hasanah Nasution Wahono, Sielve Suwanda Wahyudin Nur Nasution Wahyudin Nur Nasution, Wahyudin Nur Widya Afriani Widya Wahyu Cahyani Widyasar, Rina Widyasari, Rina Winda, Tamara windi veber yanti sembiring Wisnu Syahputra Wulan Dari, Wulan Yahfizam Yahfizam Yahfizam Yahfizham Yahfizham Yumna, Yaumi Yuni Kartika Kartika Yusnita Nurul Azzahra Yusra Habibah Laily Zahwa Syah Putri

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