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All Journal JSME MIPA UNIMA Kubik BAREKENG: Jurnal Ilmu Matematika dan Terapan Jurnal Cendekia : Jurnal Pendidikan Matematika Journal on Education de Fermat : Jurnal Pendidikan Matematika Jurnal Sains Riset SOSCIED Jurnal Sosial Humaniora Sigli JURNAL AXIOMA : Jurnal Matematika dan Pembelajaran GAUSS: Jurnal Pendidikan Matematika Frontiers Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika KUBIK: Jurnal Publikasi Ilmiah Matematika Jurnal Riset dan Inovasi Pembelajaran MARISEKOLA: Jurnal Matematika Riset Edukasi dan Kolaborasi Edu Cendikia: Jurnal Ilmiah Kependidikan Juwara : Jurnal Wawasan dan Aksara Education Journal: General and Specific Research Jurnal Ilmiah Sains Khatulistiwa: Jurnal Pendidikan dan Sosial Humaniora Innovative: Journal Of Social Science Research Simpati: Jurnal Penelitian Pendidikan dan Bahasa Lemma: Letters of Mathematics Education Jurnal Kendali Teknik dan Sains Jurnal Riset Rumpun Ilmu Pendidikan (JURRIPEN) Jurnal Pendidikan, Bahasa dan Budaya Future Academia : The Journal of Multidisciplinary Research on Scientific and Advanced J-CEKI Jurnal Pendidikan dan Sosial Humaniora Konstanta : Jurnal Matematika dan Ilmu Pengelatuan Alam
James U.L. Mangobi
Universitas Negeri Manado, Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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SEIR MODEL SIMULATION WITH PART OF INFECTED MOSQUITO EGGS Mangobi, James Uriel Livingstone
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 17 No 3 (2023): BAREKENG: Journal of Mathematics and Its Applications
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol17iss3pp1641-1652

Abstract

Dengue hemorrhagic fever (DHF) is an acute febrile disease caused by the dengue virus, which is transmitted by various species of Aedes mosquitoes. The SEIR model is a mathematical model for studying the spread of dengue fever. In this model, it is assumed that some mosquito eggs have been infected because infected mosquitoes can transmit the virus to their eggs. The main vector of this disease is the Aedes albopictus mosquito. Analysis was carried out to assess the stability of the equilibrium point, and numerical simulations were carried out to see changes in population numbers due to changes in parameter values. A disease-free equilibrium (DFE) point, which is stable given the basic reproductive number . An endemic point whose stability is guaranteed if the value . The numerical simulations show that an increasing mosquito mortality rate decreases the number of exposed, susceptible humans. Furthermore, an increase in the average bite of an infected mosquito will increase the number of exposed, susceptible humans. For the mosquito population, increasing mosquitoes’ mortality rate will decrease the number of exposed, susceptible mosquitoes. Finally, an increase in the average bite of an infected mosquito will increase the number of exposed, susceptible mosquitoes.
Optimasi Produksi Roti Di Grace Bakery Dengan Menggunakan Integer Goal Programming Lumanaw, Joshua Apriano; Mangobi, James Uriel Livingstone; Maukar, Marvel Grace
KUBIK Vol 9 No 1 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i1.35051

Abstract

Grace bakery is a home industry in making bread. The problem experienced by Grace Bakery is that Grace Bakery has not planned to optimize bread production, this has caused losses for Grace Bakery and sales have not been maximized. This research aims to formulate a mathematical model for optimizing bread production using integer goal programming and to obtain optimization results for bread production planning using integer goal programming with the help of the Lingo application. The method used to solve this integer goal programming problem is branch and bound. By using integer goal programming, the branch and bound method and with the help of the Lingo application, the research results show that Grace Bakery must produce 3993 chocolate breads, 1334 cheese breads and 4237 mocha breads every month so that Grace Bakery will earn a maximum income of Rp. 17.280.000. Revenue will reach optimal results if all the bread is sold out and there is no increase in raw materials. Grace bakery can also reduce production costs to Rp. 11.670.092,5 every month.
Kemandirian Belajar Siswa dalam Pembelajaran Matematika Secara Online di SMPN 2 Amurang Barat Viki A. Sanggor; Philotheus E. A. Tuerah; James U. L. Mangobi
Khatulistiwa: Jurnal Pendidikan dan Sosial Humaniora Vol. 2 No. 4 (2022): Desember : Jurnal Pendidikan dan Sosial Humaniora
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/khatulistiwa.v2i4.750

Abstract

Penelitian ini bertujuan untuk mengetahui dan mendeskripsikan bagaimana efektivitas kemandirian belajar siswa dalam pembelajaran matematika secara. Penelitian ini menggunakan metode kualitatif yaitu kualitatif deskriptif. Sampel penelitian terdiri dari 3 kelas yaitu kelas VII 10 siswa, kelas VIII 12 siswa, kelas IX 19 siswa SMPN 2 Amurang Barat. Instrumen dalam penelitian ini menggunakan angket dan wawancara kepada 41 siswa. Data angket dalam penelitian ini memiliki 3 indikator yang terdiri dari inisiatif belajar, mendiagnosis pelaksanaan pembelajaran, dan kesulitan faktor eksternal. Hasil yang diperoleh antara lain pada indikator inisiatif belajar, siswa tidak bersemangat belajar matematika secara daring 51%, kurang bertanya kepada guru 41%, hanya menggunakan buku dari guru untuk belajar di rumah 37%, tidak semangat belajar walaupun dapat nilai rendah 51%, dan jarang hadir 20%. Indikator mendiagnosis pelaksanaan proses pembelajaran, penjelasan guru kurang menarik 73%, penjelasan guru sulit dipahami 32%, kurang mandiri dalam pembelajaran daring 61%, Pasif dalam kegiatan belajar 54%, pembelajaran membosankan 51%. Kesulitan faktor eksternal, tidak punya kuota internet 39%, tidak ada orang yang membantu mengerjakan tugas 20%, koneksi jaringan buruk 27%, lingkungan berisik 17%, tidak memiliki telepon genggam 27%. Wawancara kepada 3 siswa/siswi bahwa mereka mengalami kesulitan dalam proses pembelajaran daring sehingga tingkat keefektifan dalam belajar mandiri tergolong rendah. Wawancara dengan guru matematika SMPN 2 Amurang barat bahwa siswa sering terlambat memasukkan tugas karena internet dan kurang aktif dalam pembelajaran. Efektivitas kemandirian siswa dalam pembelajaran daring masih tergolong rendah.
Effectiveness of Using the Independent Curriculum Based Problem Based Learning Model in Learning Trigonometry Material in Class X State High School 8 Manado Andra Christine Tombokan; James U. L. Mangobi; Jorry Ferry Monoarfa
Konstanta : Jurnal Matematika dan Ilmu Pengetahuan Alam Vol. 2 No. 1 (2024): Maret : Jurnal Matematika dan Ilmu Pengetahuan Alam
Publisher : International Forum of Researchers and Lecturers

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/konstanta.v2i1.2083

Abstract

The objective of this study is to assess the efficacy of employing the Problem-Based Learning approach in the acquisition of Trigonometry concepts. This study examines four metrics of learning efficacy: student learning outcomes, student engagement during the learning process, student feedback on learning, and the teacher's aptitude in facilitating learning. This research falls under the category of quantitative descriptive research. The research was conducted at SMA Negeri 8 Manado during the odd semester of the 2023/2024 academic year. The study included a sample of 38 students from class X-I. The employed data collection approaches include testing, observation, and administering questionnaires. The study determined that the utilization of the Problem-Based Learning (PBL) approach in teaching Trigonometry content yielded positive results. This is exemplified by the attainment of the four metrics that measure the efficacy of utilizing the learning model: (1) Student learning results in the subject matter are classified as thoroughly comprehensive. (2) Student activities during the learning process are classified as satisfactory. (3) Students exhibit a favorable attitude towards the learning process. (4) The teacher's aptitude for overseeing the learning process is exceptional.
Problem-Based Learning Model: Its Influence on Learning Straight Line Equations Asti, Asti; Mangobi, James Uriel Livingstone; Regar, Vivivan Eleonara
Juwara: Jurnal Wawasan dan Aksara Vol. 4 No. 1 (2024)
Publisher : Yayasan Pendidikan dan Pengembangan Harapan Ananda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58740/juwara.v4i1.102

Abstract

ABSTRAK Inovasi dalam pembelajaran matematika telah dilakukan oleh banyak peneliti dan pengajar matematika. Akan tetapi, masih terdapat banyak kendala yang dihadapi oleh guru bahkan siswa itu sendiri, terutama terkait hasil belajar pada materi persamaan garis lurus. Studi ini bertujuan untuk mengetahui perbedaan hasil belajar siswa yang diajarkan dengan menggunakan model problem-based learning dan model direct instruction pada materi persamaan garis lurus. Metode yang digunakan adalah metode kuantitatif dengan desain posttest only-control group design. Subjek penelitian adalah siswa kelas VIIIB dan siswa kelas VIIIC SMP Negeri 3 Tondano. Instrumen yang digunakan berupa tes berbentuk uraian untuk menilai hasil belajar siswa pada materi persamaan garis lurus. Hasil perhitungan statistic menunjukkan bahwa diperoleh thitung = 3,808 dan ttabel = 1,682 untuk db = 42 dan a = 0.05. Sehingga thitung > ttabel dengan demikian berdasarkan kriteria pengujian, jika thitung > ttabel maka tolak H0, artinya rata-rata hasil belajar siswa pada materi PGL yang diajar menggunakan model PBL lebih dari rata-rata hasil belajar PGL siswa yang diajar menggunakan model DI.Oleh karena itu, model PBL dapat dijadikan rujukan utama bagi guru dalam mengembangkan pembelajaran matematika khususnya pada materi PGL. ABSTRACT Many mathematics researchers and teachers have carried out innovations in mathematics learning. However, there are still many obstacles faced by teachers and even students themselves, especially regarding learning outcomes in straight-line equations. This study aims to determine the differences in student learning outcomes taught using the problem-based learning model and the direct instruction model on straight-line equation material. The method used is a quantitative method with a posttest-only-control group design. The research subjects were class VIIIB students and class VIIIC students at SMP Negeri 3 Tondano. The instrument used is a test in a description to assess student learning outcomes in straight-line equation material. The results of statistical calculations show that t_count=3.808 and t_table=1.682 for db=42 and ?=0.05. So that t_count>t_tabel is thus based on the testing criteria, if t_count>t_tabel, then reject H_0, meaning that the average student learning outcomes in PGL material taught using the PBL model are more than the average PGL learning outcomes for students taught using the IN models. Therefore, the PBL model can be used as the primary reference for teachers in developing mathematics learning, especially in PGL material.
Optimasi Produksi Roti Di Grace Bakery Dengan Menggunakan Integer Goal Programming Lumanaw, Joshua Apriano; Mangobi, James Uriel Livingstone; Maukar, Marvel Grace
KUBIK Vol 9 No 1 (2024): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v9i1.35051

Abstract

Grace bakery is a home industry in making bread. The problem experienced by Grace Bakery is that Grace Bakery has not planned to optimize bread production, this has caused losses for Grace Bakery and sales have not been maximized. This research aims to formulate a mathematical model for optimizing bread production using integer goal programming and to obtain optimization results for bread production planning using integer goal programming with the help of the Lingo application. The method used to solve this integer goal programming problem is branch and bound. By using integer goal programming, the branch and bound method and with the help of the Lingo application, the research results show that Grace Bakery must produce 3993 chocolate breads, 1334 cheese breads and 4237 mocha breads every month so that Grace Bakery will earn a maximum income of Rp. 17.280.000. Revenue will reach optimal results if all the bread is sold out and there is no increase in raw materials. Grace bakery can also reduce production costs to Rp. 11.670.092,5 every month.
Co-Authors Alfraldo Lahaube Andra Christine Tombokan Anetha L.F. Tilaar Annisa Ibrahim Arlen R. Maneking Asti Asti Ayu F. Nikiulu Bangki, Nindy Titania Benidiktus Tanujaya Beslar, Janet Friska Bimbanaung, Sofian S. Christy Genoveva Matialo Damai, I W. Derel Filandy Kaunang Deyvita Tanor Diawang, Meilani A. Dollydia Mart Sasauw Ermita Ermita Eunike Priskila Lisade Fauzi Virgiawan Lahinta Fera Sumodiharjo Fernando Febrianto Kawatu Fernando Febrianto Kawatu Gabriel E. W. Mosey Gia Mokoginta Goguyu, Irfan Gosal, Militia Jeane Jenifer Grafi Lonto Gunawan, Shintia D. Harmelita Halean Imanuel Supit Watung Imanuel Supit Watung Jorry F Monoarfa Kaawoan, Lyke Kaunang, Derel F Kaunang, Josua Joseph Bergkam Kenny E. F. Bawoleh Kodongan, Gidieon Romario Kondoahi, Riani Christina Lakumani, Novlin A. Lasut, Meicy Maria Lumanaw, Joshua Apriano Lumansi, Frids M. Makasudede, Yesika Dian Natasya Mandagi, Rinai Zita Mandey, Amelia Luisa Maningide, Meivilia Inke Mardino M. Maloky Marvel G. Maukar Maukar, Marvel Grace Meifi Anjelina Rumenta Millenia Cruisita Lukas Misel Tambariki Modeong, Masni Momongan, Jeremia Momongan, Novita Murni Sulistyaningsih Natalia C. Tumbel Nelwan, Julivky Nofanti Yustina Noper Pamula Pangemanan, Altje S. Pantow, Tesalonika Angely Pascoal, Arantica Vellycia Jesica Philotheus E. A. Tuerah Philotheus E. A. Tuerah Pilendatu, Citra Pitoy, Cori Poluan, Marsela M. Regar, Vivivan Eleonara Rori, Deais Nadya Debora Rosiah J. Pulukadang Rotti, Helga V. Runtu, V. J. Sambuaga, O T Sania Veolina Br Ginting Santje M. Salajang Sasamira, Indriyani Selfie L. Kumesan Sengkey, Dwi Jeanita Siby, Rishadewi Stevanli Tatia Suliasti Nevaria Martelu Sumendap, Yohana F. Sundah, Andrew G. Temo, Falentino Varlina Fani Rantung Victor R. Sulangi victor Sulangi Viki A. Sanggor Viki A. Sanggor Vivian E. Regar Vivian E. Regar Wuwumbene, Megi E. Yunike Manopo Yustika Sariamas