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All Journal CAUCHY: Jurnal Matematika Murni dan Aplikasi AdMathEdu : Jurnal Ilmiah Pendidikan Matematika, Ilmu Matematika dan Matematika Terapan Kubik Jurnal Sains Matematika dan Statistika Edumatsains NUMERICAL (Jurnal Matematika dan Pendidikan Matematika) Sinkron : Jurnal dan Penelitian Teknik Informatika Desimal: Jurnal Matematika BAREKENG: Jurnal Ilmu Matematika dan Terapan Justek : Jurnal Sains Dan Teknologi JURNAL TEKNIK INFORMATIKA DAN SISTEM INFORMASI Zeta - Math Journal Jurnal Pendidikan Matematika (JUDIKA EDUCATION) NUSANTARA : Jurnal Ilmu Pengetahuan Sosial Zero : Jurnal Sains, Matematika, dan Terapan JISTech (Journal of Islamic Science and Technology) AXIOM : Jurnal Pendidikan dan Matematika JURNAL MathEdu (Mathematic Education Journal) JOURNAL OF SCIENCE AND SOCIAL RESEARCH Saintifik : Jurnal Matematika, Sains, dan Pembelajarannya M A T H L I N E : Jurnal Matematika dan Pendidikan Matematika Math Educa Journal Progresif: Jurnal Ilmiah Komputer JURNAL PEMBELAJARAN DAN MATEMATIKA SIGMA (JPMS) Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika JOURNAL OF INFORMATION SYSTEM RESEARCH (JOSH) SEPREN: Journal of Mathematics Education and Applied Community Development Journal: Jurnal Pengabdian Masyarakat Theta : Jurnal Pendidikan Matematika Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Jurnal Pengabdian kepada Masyarakat Nusantara KUBIK: Jurnal Publikasi Ilmiah Matematika Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi FARABI: Jurnal Matematika dan Pendidikan Matematika Mathematics and Applications (MAp) Journal Humantech : Jurnal Ilmiah Multidisiplin Indonesia Jurnal IPTEK Bagi Masyarakat Journal of Mathematics and Scientific Computing With Applications Relevan Jurnal Informatika Teknologi dan Sains (Jinteks) Edu Society: Jurnal Pendidikan, Ilmu Sosial dan Pengabdian Kepada Masyarakat Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Abdimas Indonesian Journal Bulletin of Applied Mathematics and Mathematics Education International Conference on Sciences Development and Technology JS (Jurnal Sekolah) Jurnal Bayesian : Jurnal Ilmiah Statistika dan Ekonometrika JME APPA : Jurnal Pengabdian Kepada Masyarakat Faedah: Jurnal Hasil Kegiatan Pengabdian Masyarakat Indonesia Jurnal Pengabdian Masyarakat Algebra Indonesia Bergerak: Jurnal Hasil Kegiatan Pengabdian Masyarakat Relevan : Jurnal Pendidikan Matematika Educational Journal
Riri Syafitri Lubis
Universitas Islam Negeri Sumatera Utara, Medan, Indonesia
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PENGARAUH MODEL PEMBELAJARAN TEAMS GAMES TOURNAMENT DAN THINK TALK WRITE TERHADAP KEAKTIFAN DAN HASIL BELAJAR SISWA Sahraini Siregar, Fadilatus; Neliwati; Syafitri Lubis, Riri
Algebra : Jurnal Pendidikan, Sosial dan Sains Vol 3 No 4 (2023): ALGEBRA : JURNAL PENDIDIKAN, SOSIAL DAN SAINS
Publisher : Yayasan Amanah Nur Aman

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRAK Penelitian ini bertujuan untuk mengetahui Pengaruh Model Pembelajaran Teams Games Tournament Dan Think Talk Write Terhadap Keaktifan Dan Hasil Belajar Matematika Siswa Pada Materi Persamaan Kuadrat Kelas IX MTs Yayasan Cerdas Murni Tahun Ajaran 2020/2021.Penelitian ini adalah penelitian kuantitatif, dengan jenis penelitian quasi eksperimen. Populasinya adalah seluruh kelas IX MTs Cerdas Murni tahun ajaran 2020/2021 yang berjumlah 95 siswa. Sampel yang digunakan oleh peneliti adalah kelas IX 1 dan IX 2 yang masing-masing berjumlah 30 siswa untuk dijadikan kelas eksperimen I dan II yang ditentukan dengan cara sampling jenuh. Hasil temuan ini menunjukkan: 1) Terdapat pengaruh pembelajaran menggunakan model pembelajaran teams games tournament dan think talk write terhadap keaktifan belajar matematika siswa pada materi persamaan kuadrat kelas IX MTs Cerdas Murni dengan Fhitung = 7,813 > Ftabel pada taraf (a=0,05) = 4,043; 2) Tidak terdapat perngaruh model pembelajaran teams games tournament dan think talk write terhadap hasil belajar matematika siswa pada materi persamaan kuadrat kelas IX MTs Cerdas Murni, dengan ????ℎ???????????????????? = 2,157 < ????????????????????????pada taraf (a = 0,05) = 4,043 ; 3) Terdapat pengaruh model pembelajaran teams games tournament dan think talk write terhadap keaktifan dan hasil belajar siswa pada materi persamaan kuadrat kelas IX MTs Cerdas Murni, dengan????ℎ???????????????????? = 1,061 > ???????????????????????? pada taraf (a = 0,05) = 10,004. Kata Kunci : Keaktifan; Hasil Belajar; Model Pembelajaran.   ABSTRACT This research aims to determine the influence of the Teams Games Tournament and Think Talk Write learning models on student activity and mathematics learning outcomes in quadratic equation material for Class IX MTs Smart Murni Foundation for the 2020/2021 academic year. This research is quantitative research, with a quasi-experimental type of research. The population is all class IX of MTs Smart Murni for the 2020/2021 academic year, totaling 95 students. The samples used by researchers were classes IX 1 and IX 2, each with 30 students to be used as experimental classes I and II which were determined using saturated sampling. The results of these findings show: 1) There is an influence of learning using the teams games tournament and think talk write learning models on students' active mathematics learning in quadratic equations material for class IX MTs Smart Murni with Fcount = 7.813 > Ftable at level (a=0.05) = 4,043; 2) There is no influence of the team games tournament and think talk write learning models on students' mathematics learning outcomes in quadratic equations material for class IX MTs Smart Murni, with ????ℎ???????????????????? = 2.157 < ????????????????????????at the level (a = 0.05) = 4.043; 3) There is an influence of the teams games tournament and think talk write learning model on student activity and learning outcomes in quadratic equation material for class IX MTs Smart Murni, with ????ℎ???????????????????? = 1.061 > ???????????????????????? at the level (a = 0.05) = 10.004. Keywords: Activeness; Learning outcomes; Learning model.
Optimasi Kapasitas Biaya Produksi Furniture Menggunakan Heuristik Medhod Siregar, Evi Borliana; Syafitri Lubis, Riri
Progresif: Jurnal Ilmiah Komputer Vol 19, No 2: Agustus 2023
Publisher : STMIK Banjarbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35889/progresif.v19i2.1500

Abstract

Increasingly tight and competitive industrial competition in Indonesia requires business people to increase effectiveness and efficiency in all fields. Company PT. Jibta Rimba Djaja is included in the log smelting industry which produces plywood products which have continued to experience an increase in demand in recent years. As demand tends to increase, problems related to production begin to emerge. One of them is about optimizing product capacity and consumers often cancel purchases because currently there are so many obstacles such as a lack of products and a lack of manpower when demand is quite high. This study aims to develop a production plan to meet demand at the right time by using the remaining sources or alternatives with the minimum cost of the entire product. The method used is the Heuristic Method. With Forecasting using the Weight Moving Average Method, the Exponential Smoothing Method and the Somple Moving Average Method. Then the optimization analysis method is carried out using the Labor control method, the Inventory Control Method, the Subcontract Control Method and the Mixed Method. This study concludes that the labor control method is the lowest Heuristic method for optimizing furniture  production cost capacity with the smallest cost of Rp. 1,240,824,057.Keywords: Production; Capacity Optimization; Heuristic method; Forecasting; Cost Efficiency AbstrakSemakin ketat dan kompetitifnya persaingan industri di Indonesia menuntut para pelaku bisnis untuk meningkatkan efektifitas dan efisiensi di segala bidang. Perusahaan PT. Jibta Rimba Djaja termasuk industri peleburan kayu bulat yang menghasilkan produk triplek yang terus mengalami peningkatan permintaan dalam beberapa tahun terakhir. Seiring dengan permintaan yang cenderung meningkat, maka permasalahan yang berkaitan dengan produksi mulai muncul. Salah satunya adalah mengenai pengoptimalan kapasitas produk dan sering konsumen membatalkan pembelian karna saat ini banyak sekali kendala seperti kurangnya produk dan kurangnya tenaga kerja di saat permintaan yang cukup tinggi. Penelitian ini bertujuan untuk menyusun suatu rencana produksi untuk memenuhi permintaan pada waktu yang tepat dengan menggunakan sumber-sumber atau alternatif-alternatif yang tersisa dengan biaya yang paling minimum dari keseluruhan produk. Metode yang digunakan adalah Metode Heuristic. Dengan Forecasting menggunakan Metode Weight Moving Avrage, Metode Exponensial Smoothing dan Metode Somple Moving Avarage. Kemudian cara analisis pengoptimalan dilakukan dengan metode pengendalian Tenaga Kerja, Metode Pengendalian Persediaan, Metode Pengendalian Subkontrak dan Metode Campuran. Penelitian ini menyimpulkan metode pengendalian tenaga kerja merupakan metode heuristik terendah untuk mengoptimalkan kapasitas biaya produksi furniture  dengan biaya terkecil sebesar Rp. 1.240.824.057.Kata kunci: Produksi; Pengoptimalan Kapasitas; Metode Heuristic; Forecasting; Efesiensi Biaya
Penerapan Metode Ensemble K-Nearest Neighbor untuk Memprediksi Indeks Pembangunan Manusia di Provinsi Sumatera Utara Oktaviana, Oktaviana; Lubis, Riri Syafitri; Widyasari, Rina
Justek : Jurnal Sains dan Teknologi Vol 7, No 4 (2024): Desember
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v7i4.27031

Abstract

Abstract:  The Human Development Index is one of the important indicators to illustrate the level of success of a region in trying to build the quality of its population in terms of health, education and others. On the island of Sumatra out of 10 provinces, the Human Development Index in North Sumatra Province is still far behind when compared to Riau Islands Province. This is due to the lack of government role in improving human development in a region. The purpose of this study is to determine the prediction results of the Human Development Index value in North Sumatra Province using the Ensemble K-Nearest Neighbor method and see how much accuracy the Ensemble K-Nearest Neighbor method has to predict the Human Development Index. One method that can be used in predicting the Human Development Index is the Ensemble K-Nearest Neighbor method. K-Nearest Neighbor is a method that determines the label (class) based on distance. To optimize the performance of the K-NN method in making predictions, ensemble techniques are needed. Based on the research conducted, the prediction results obtained using the K-Nearest Neighbor Ensemble method have an average of 72.97 with a MAPE value of 2.1%, which is much better when compared to only using the Single K-NN method which has a MAPE value of 2.38%. Abstrak: Indeks Pembangunan Manusia adalah salah satu indikator penting untuk menggambarkan tingkat keberhasilan suatu daerah dalam usaha membangun kualitas penduduknya baik dari segi kesehatan, pendidikan maupun lainnya. Di pulau Sumatera dari 10 provinsi yang ada, Indeks Pembangunan Manusia di Provinsi Sumatera Utara masih jauh tertinggal jika dibandingkan dengan Provinsi Kepulauan Riau. Hal demikian diakibatkan masih kurangnya peran pemerintah dalam meningkatkan pembangunan manusia disuatu daerah. Tujuan dari penelitian ini yaitu untuk mengetahui hasil prediksi nilai Indeks Pembangunan Manusia di Provinsi Sumatera Utara menggunakan metode Ensemble K-Nearest Neighbor serta melihat seberapa besar tingkat akurasi metode Ensemble K-Nearest Neighbor untuk memprediksi Indeks Pembangunan Manusia. Salah satu metode yang dapat digunakan dalam memprediksi Indeks Pembangunan Manusia  adalah metode Ensemble K-Nearest Neighbor. K-Nearest Neighbor adalah salah satu metode yang menentukan label (class) berdasarkan jarak. Untuk mengoptimalkan kinerja metode K-NN dalam melakukan prediksi diperlukan teknik ensemble. Berdasarkan penelitian yang dilakukan maka diperoleh hasil prediksi menggunakan metode Ensemble K-Nearest Neighbor memiliki rata-rata sebesar 72,97 dengan nilai MAPE 2,1% hal tersebut jauh lebih baik jika dibandingkan hanya menggunakan metode K-NN Tunggal yang memiliki nilai MAPE sebesar 2,38%.
Penerapan Regresi Poisson Inverse Gaussian Pada Faktor Yang Mempengaruhi Jumlah Kasus Demam Berdarah Dengue Di Kabupaten Deli Serdang Wulandari, Mitha; Lubis, Riri Syafitri; Aprilia, Rima
JURNAL PEMBELAJARAN DAN MATEMATIKA SIGMA (JPMS) Vol 10, No 2 (2024)
Publisher : Fakultas Keguruan dan Ilmu pendidikan (FKIP) Universitas Labuhan Batu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpms.v10i2.6406

Abstract

Data jumlah kasus DBD berbentuk data cacahan dan pemodelannya menerapkan ilmu matematika yaitu ‎Regresi Poisson Inverse Gaussian dikarenakan data mengalami overdispersi atau ‎nilai variansinya lebih besar dari nilai rata-ratanya. Overdispersi menyebabkan ‎kesimpulan yang diperoleh menjadi tidak valid dikarenakan nilai standar eror ‎menjadi underestimate. Tujuan penelitian yaitu untuk mengidentifikasi faktor-‎faktor yang berperan signifikan terhadap jumlah kasus DBD di Kabupaten Deli ‎Serdang dengan menerapkan Regresi Poisson Inverse Gaussian (RPIG). Adapun ‎variabel prediktor yang digunakan yaitu persentase kepadatan penduduk (X1), ‎persentase penduduk miskin (X2), persentase jumlah tenaga kesehatan (X3), ‎persentase jumlah fasilitas kesehatan (X4) dan persentase rumah tangga dengan ‎kondisi sanitasi tidak layak (X5). Hasil yang diperoleh dari model RPIG yang ‎terbentuk dan model yang terpilih memiliki nilai AIC terendah yaitu 201,7206 dengan variabel ‎prediktor yang berperan signifikan pada model yaitu persentase kepadatan ‎penduduk (X1), persentase jumlah penduduk miskin (X2) dan persentase jumlah ‎tenaga kesehatan (X3)‎. Model tersebut menginterpretasikan bahwa meningkatnya 1 rasio persentase kepadatan penduduk maka akan sejalan dengan naiknya rata-rata jumlah kasus DBD sebesar 1,05571683, apabila meningkatnya 1 rasio persentase jumlah penduduk miskin maka akan sejalan dengan menurunnya rata-rata jumlah kasus DBD sebesar 0,815454217 dan apabila meningkatnya 1 rasio persentase jumlah tenaga kesehatan maka akan sejalan dengan menurunnya rata-rata jumlah kasus DBD sebesar 0,00470273982.
PENERAPAN CRITICAL PATH METHOD (CPM) DALAM MENGANALISIS MANAJEMEN WAKTU PADA PERENCANAAN IKLAN GMS DIGITAL MARKETING Cynthia, Mayang Modelina; Cipta, Hendra; Lubis, Riri Syafitri
Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Vol. 5 No. 2 (2024): Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistik
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/lb.v5i2.627

Abstract

Planning helps monitor activities. to achieve the expected efficiency and effectiveness. In advertising planning at GMS Digital Marketing, there are often losses. The purpose of this study is to find out how to manage good time in advertising planning in GMS Digital Marketing and find out what efforts can be made so that advertising planning has efficient time. A mathematical approach called Critical Path Analysis (CPM) is used to organize the grouping of project operations. The project activities described using the CPM Method are a two-round procedure consisting of a forward and backward approach to setting a schedule when conducting a critical path analysis. ES and EF are set up during the forwarding process. During the transfer, LS and LF are determined. Early Start (ES) is the fastest way to start an activity. CPM is a cost-cutting approach for projects. We can know when costs and schedules need to be negotiated to meet project deadlines while keeping costs as low as possible. When a dimension is used, then CPM is used. (More accurate time estimates). Therefore, from the results of this study, a critical path is obtained that requires additional labor and time in completing the work
Klasifikasi Kabupaten/ Kota Sejahtera dan Tidak Sejahtera dengan Metode Spectral Clustering pada Provinsi Sumatera Utara Batu, Annisa Rajaq Lumban; Lubis, Riri Syafitri; Harleni, Silvia
Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika Vol. 8 No. 1 (2025): Sains Matematika dan Pendidikan Matematika
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/proximal.v8i1.4887

Abstract

People's welfare is basically a condition whose form is dynamic or in other words its quantitative value will never stop because it will continue to change along with the development of human life needs. In the Regional Medium Term Development Plan (RPJMD) of North Sumatra Province, the government is trying to realize an advanced and prosperous community life. Law No. 11 of 2019 article 3 paragraph 1, it is also written that the purpose of administering social welfare is to increase the level of welfare, quality and survival. As according to the Central Statistics Agency for North Sumatra in 2021 regarding indicators of people's welfare, namely, population, health, education, employment, household consumption and expenditure, housing and the environment, and participation in social activities. To make a strategy to improve the welfare of the people of North Sumatra, the Government needs to determine which districts or cities are prosperous and which are not. This study uses the spectral clustering method in which this method forms clusters obtained according to data taken at the Central Bureau of Statistics which will be carried out in 2022 data taken in 2021. The results of this study indicate the application of the spectral clustering method for classifying prosperous and less prosperous city districts in North Sumatra province and clusters obtained as many as 2 clusters from data from 33 urban districts in North Sumatra province, namely cluster 1 is a prosperous district or city, namely Medan and Deli Serdang, and cluster 2 is a district or city that is not prosperous, namely, apart from Medan and Deli Serdang.
Ant Colony Optimization Algorithm for Traveling Salesman Problem in Distributing Fertilizer Hazizah, Salsabillah; Lubis, Riri Syafitri; Cipta, Hendra
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 8 No. 2 (2023): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v8i2.388

Abstract

Fertilization sometimes takes a long time due to the selection of mileage traveled in fertilizer distribution and coupled with the condition of  plantation roads that are partially damaged. The path taken is usually only a path that is memorized and is considered the shortest and optimal. The journey from one location to another by considering the shortest path is included in the problem of graph theory. To determine the shortest path to be traversed, you can use the Ant Colony algorithm, because it is optimal in determining short distances and can measure the minimum accumulated travel time close to optimal. This is a Traveling Salesman Problem (TSP) problem, which is visiting all location points starting from the starting point and ending at the starting point again. This research was conducted on oil palm plantations of PT. Socfindo Bangun Bandar in fertilizer distribution. The sample used is 6 location points which are then solved using the Ant Colony algorithm where this algorithm adopts the workings of ants to get the shortest route. The use of the Ant Colony algorithm in this case is limited to one cycle or one iteration (NC=1) so that the best route is obtained while the first cycle is the fertilizer warehouse (V1) to block 55 (V4) then block 63 (V6) to block 61 (V5) then block 51 (V2) to block 52 (V3) and back again to the fertilizer warehouse (V1), and from this route can be modified again to the opposite route with a distance of 15.71 km. Because the resulting distance is shorter than the usual route, this can speed up the time used by trucks to distribute fertilizer so that trucks can be used by workers to transport harvested palm fruit.
Survival Analysis of Patient Healing in Mental Disorders Using Kaplan Meier’s Method and Log-Rank Test Darmawan, Rahmat; Lubis, Riri Syafitri
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 8 No. 2 (2023): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v8i2.428

Abstract

A mental disorder is a mental dysfunction that can interfere with everyday activities. Based on the characteristics of the area of the City of Medan there are problems with mental disorders, the high number of ODGJ cases is very dangerous for society. To this end, a survival analysis of the ODGJ patient’s lifespan time was carried out at the Karsa Medan Soul Hospital with the Kaplan-Meier test as a calculation of the estimate of the healing time and the Log-Rank test to test the differences in the survival function of the treatment time of ODGJ patients. The conclusion of the test results obtained with the help of the R Studio software program version 2022.02.1+461 was that the survival function curve in ODGJ patients had an estimate of survival functions at ODGJ from a 2-day recovery time with a value of 0.99759 to 92 days with the value of 0,00000. Based on the results of the Log-Rank test with α = 0.05, obtained the test results for gender is 4.40 ˃ 3.84, then rejected , so there is a significant difference, and the results of survival estimation on the first day of male survival opportunities of 0.9931 (99.31%) are greater than women, namely 0.9919 (99. 19%), so that male patients recover longer than female patients; then the result of the Age-based Log-rank test is 2.44 ˂ 3.84, there is no rejection , so there are no significant differences, and the results of survival estimation on the first day of survival opportunities for patients aged  years is 0. 992 (99.2%) is greater than the patient aged  years is 0.986 (98.6%), so that patients aged  years recover faster than patients aged  years; and last Log-Rank results for comorbid and non-comorbid is 27.21 ˃ 3.84, there are rejections , so there is a significant difference, and the results of survival estimation on the first day the survival chance of comorbid patients is 0.9961 (99.61%) greater than that of non-comorbid patients which is 0.9937 (99.37%), so that non-comorbid patients recover faster than comorbid patients.
Implementation of A-Star Algorithm In Finding The Shortest Route of Cooking Oil Distribution in Karo Regency Using Graph Ropiqoh, Ropiqoh; Lubis, Riri Syafitri
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 8 No. 2 (2023): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v8i2.442

Abstract

PT. XYZ is a company that distributes cooking oil in Karo Regency. Based on what has been observed at PT. XYZ, the distribution of goods has not contained standard provisions in determining the route of delivery of goods, large areas cause great difficulties in the distribution of goods because they require greater transportation costs. To overcome the distribution problem, a workable solution is the A-Star algorithm using graphs. The A-Star algorithm has two points, namely Open List and Close List.  Where conceptually open list means a point that can be skipped while close list means a point that cannot be passed. And usability the Close List is needed so that the algorithm does not need to check the points it passes, so that it can more quickly complete the search process and the checking process at each point can be less, In general, the concept of determining the closest path in an algorithm is that it can stop when the open list is not found and the endpoint has been obtained. while the company's route was 30.95 km. Then the percentage of mileage savings is 62.16%. This shows that the A-Star algorithm can minimize distance and also save companies costs.
Estimated Sulfur Dioxide Pollutant Concentrations In Medan City Using Ordinary Kriging and Inverse Distance Weighting Approaches Fatmawati, Ayu Isnaini; Lubis, Riri Syafitri
Mathline : Jurnal Matematika dan Pendidikan Matematika Vol. 9 No. 1 (2024): Mathline: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/mathline.v9i1.548

Abstract

Sulfur dioxide (SO2) pollution is a serious problem that negatively affects air quality and human health. So2 is generated by various human activities, especially the combustion of fossil fuels, as well as from natural sources such as volcanic eruptions. The emission of SO2 in urban areas, including Medan, Indonesia, has raised concerns as it is associated with respiratory diseases and the formation of acid rain. This research aimed to estimate comparative SO2 concentrations in Medan City using geostatistical methods, specifically ordinary kriging and inverse distance weighted (IDW). Air quality monitoring data from the Dinas Lingkungan Hidup Kota Medan were collected during a certain period. The collected data were analyzed and then interpolated using ordinary kriging and IDW methods. Furthermore, the Ordinary Kriging method involves testing the OK assumption, calculation of the experimental semivariogram, calculation of the theoretical semivariogram, structural analysis, and calculation of Root Mean Square Error (RMSE). Meanwhile, the Inverse Distance Weighted method involves calculating the Euclidean distance, determining the weights based on the power parameter, calculating the RMSE value, and estimating the SO2 concentration. The comparison results show that the OK method is more accurate in determining SO2 concentration compared to the IDW method in Medan City. In the estimation of sulfur dioxide (SO2) concentration, the OK method used the best theoretical semivariogram model, namely the exponential model, and in the estimation process of the IDW method, the power parameter 1 was used.
Co-Authors Adisty, Fahliza Ahmad Sugarda Ainun Palihah Almira Amir Ananda, Lyra Anggi Pranata Annisa, Nur Alvi Aprilia, Rima Arjuna, Dimas Bagus Aslam, Fazri Aulia Turrizqiya Auliya Ramadhani, Dhea Batu, Annisa Rajaq Lumban Bella Syahrani Nasution Blaster, Irena Br Siahaan, Erika Handayani Cynthia, Mayang Modelina Dara Nurul Hasnah dewi, mutia hatina Dian Darmawan Didik Santoso Didik Santoso Dinda Renata Cecilia Dwi Haprida Ningsih Elma Dwi Ariana Aprilia Zam Elpita Sari Hasibuan Evi Borliana Siregar Fachrur Rozi Fadhliyah, Annisa Fadilatus Sahraini Siregar Fadillah, Yanna Rezki Fajriana, Fajriana Farwansyah, Mhd Rio Fatmawati, Ayu Isnaini Fernando, Anjas Fikri Husin Batubara Fuja Nauli Pasaribu Giawa, Freddy Gishela Agra Moukia Gurusinga, Ditha Aulia Harleni, Harleni Harleni, Silvia Hasibuan, Hani Maulida Hazizah, Salsabillah Hendra Cipta Heni Pujiastuti Ilham Salim Siregar Ilham Syaputra Indah Kholila Indah, Windi Rezeki Ir Zulkarnain, Ayu Najmita Binti Irena Blaster Ismail Husein, Ismail Kartika , Dinda Khairun Nikmah Kurahman, Panca Taufik Latersia, Egya Dora Lisa Setia Ningsih M Agung Pradana Manurung, Silvi Khairiyah Maudya Nur Azura Mhd Ikhsan Rifki Mohammad Badri Muhamar Chaniago, Febri Muhammad Arfie Munawar Muhammad Farhan Mingka Muhammad Vikry Rezky Rambe Muliawan, Hari Nabilla, Widi Ihdina Nadhila, Nurul Nasution, Alfina Febriani Nasution, Dafa Al Qifti Nasution, Fakhrur Rozi Nasution, Hamidah . Neliwati Neliwati Nenna Irsa Syahputri Nina Amanda Nova Audry Utami Nurmadani Nurmawati Nurmawati Nurmawati Nurul Nadhila Nusantara, Badai Charamsar Oktaviana Oktaviana Palihah, Ainun Pertiwi, Fina Nur Pohan, Ahmad Syahrial Pohan, Siti Rolizah Pradana, M Agung Prasetya, Nurul Huda Pratiwi, Miftah Pulungan, Ahmad Fauzan Putri Harahap, Rahmelia Rahayu, Sri Ulfa Rahmat Darmawan, Rahmat Rakhmawati, Fibri Riani Dwi Lestari Ricka Afriani Rima Aprilia Rima Aprilia Rina Filia Sari Rina Filia Sari, Rina Filia Rina Sari Filia Rina Widyasari Ritonga, Nurhalimah Rivani Kabrina Br Surbakti Rizkina, Ayu Rizky Mulyani Ropiqoh, Ropiqoh Ropiqoh, Ropiqoh Rusydi Ananda Ruth Mayasari Simanjuntak Sahraini Siregar, Fadilatus Sajaratud Dur Samsudin, Samsudin Sari, Evi Indah Serdano, Akbar Simamora, Devitasari Sintia Agustina Siregar Siregar, Evi Borliana Siregar, Fadilatus Sahraini Siregar, Tanti Jumaisyaroh Siti Jubaidah Siti Zunaida Nasution Suci Dahlya Narpila, Suci Dahlya Suci Permata Sari Suendri, Suendri Sulaiman Ananda Harahap Supiah Supiah Susanti, Komaria Susilowati, Rahmi Suzana, Yenny Syafitri, Ellysa Syahfitri, Fatharani Syahputra, Bayu Teza Syahputri, Linna Syahputri, Nenna Irsa Syarah, Fatmah Tanjung, Aida Febriana Tanti Jumaisyaroh Siregar Tri Amisri, Nurul Hasanah Tri Handayani Tri Lutfiah Wardah Turrizqiya, Aulia Utami, Destia Nada Utami, Ristika Dian Vani Hajari Wenny Marta Dolok Saribu Widyasari, Rina Widyasari, Rina Windi Rezeki Indah Wulandari Wulandari Wulandari, Mitha Yahfizham Yahfizham Yoffa Sunita Yulanda Novita Zebua Yulinda, Jeni Zahedi . Zakaria Alfikri Sirait Zam, Elma Dwi Ariana Aprilia