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All Journal AKSIOMA: Jurnal Program Studi Pendidikan Matematika Jurnal Penelitian Pendidikan IPA (JPPIPA) Numeracy : Jurnal Ilmiah Pendidikan Matematika JURNAL EDUCATION AND DEVELOPMENT Jurnal Mantik MES: Journal of Mathematics Education and Science Jurnal Eduscience (JES) JURNAL PEMBELAJARAN DAN MATEMATIKA SIGMA (JPMS) Bulletin of Information Technology (BIT)

Pasaribu, Rohani

Prodi Pendidikan Matematika, FKIP Universitas Labuhanbatu

Author-ID : 1091300

Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Other

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PERBANDINGAN KEMAMPUAN BERPIKIR KRITIS SISWA DENGAN MENGGUNAKAN MODEL PEMBELAJARAN KOOPERATIF INKUIRI DENGAN KONVENSIONAL PADA POKOK BAHASAN SISTEM PERSAMAAN LINEAR TIGA VARIABEL (SPLTV) DI KELAS X SMA NEGERI 1 BILAH HULU Rohani Pasaribu
JURNAL EDUSCIENCE (JES) Vol 4, No 1 (2017): Jurnal Eduscience (JES)
Publisher : Universitas Labuhanbatu

Penelitian ini bertujuan untuk mengetahui perbandingan model pembelajaran kooperatif inkuiri dengan konvensional terhadap kemampuan berpikir kritis siswa di kelas X SMA Negeri 1 Bilah Hulu tahun pembelajaran 2015/2016. Metode penelitian yang digunakan adalah metode quasi eksperimen. Pada penelitian sampel diambil sebanyak 30 orang untuk masing-masing kelompok dengan menggunakan model pembelajaran kooperatif inkuiri pada kelas eksperimen dan model konvensional pada kelas kontrol. Instrumen yang digunakan dalam penelitian berupa pilihan ganda yang digunakan untuk mengukur kemampuan berpikir kritis siswa pada pokok bahasan sistem persamaan linear tiga variabel (SPLTV). Hasil pengujian hipotesis posttes pada kelas eksperimen dan kontrol diperoleh thitung = 3,060 pada df = 29 taraf nyata = 0,05 dengan ttabel = 2,716. Pada hasil tersebut dapat dinyatakan bahwa thitung > ttabel maka 3,060 > 2,716 sehingga Ho diterima. Jadi dapat disimpulkan bahwa model pembelajaran kooperatif inkuiri lebih baik digunakan dari pada konvensional terhadap kemampuan berpikir kritis siswa. Model konvensional kurang efektif dapat dilihat dari hasil posttes kelas eksperimen dan kontrol diperoleh standar deviasi 7,506 dengan rata-rata nilai pretes kelas eksperimen dengan model pembelajaran inkuiri adalah 71,73. Model pembelajaran kooperatif inkuiri berpengaruh terhadap kemampuan berpikir kritis siswa Pada hasil posttes kelas eksperimen diperoleh rata-rata 71,73 dengan standar devisiasi 7,506 sedangkan pada hasil posttes kelas kontrol diperoleh rata-rata 66,83. Sehingga dikatakan bahwa semua Variabel berpengaruh secara signifikan. Maka Ho ditolak dan Ha diterima.

PENGEMBANGAN PERANGKAT PEMBELAJARAN MENGUNAKAN PENDEKATAN MATEMATIKA REALISTIK UNTUK MENINGKATKAN KEMAMPUAN PEMECAHAN MASALAH DAN DISPOSISI MATEMATIKA SISWA SMP MUHAMMADIYAH-24 AEK KANOPAN Rohani Pasaribu
JURNAL EDUSCIENCE (JES) Vol 2, No 2 (2015): Jurnal Eduscience (JES)
Publisher : Universitas Labuhanbatu

Tujuan penelitian ini adalah untuk: (1) Menemukan perangkat pembelajaran matematika Realistik yang efektif meningkatkan kemampuan pemecahan masalah matematika siswa (2) Mendiskripsikan peningkatan

APLIKASI PEMBELAJARAN CTL (CONTEXTUAL TEACHING AND LEARNING) DALAM PENINGKATAN KEMAMPUAN KONEKSI MATEMATIS SISWA Suriyani Suriyani; Rohani Rohani
JURNAL PEMBELAJARAN DAN MATEMATIKA SIGMA (JPMS) Vol 5, No 1 (2019)
Publisher : Fakultas Keguruan dan Ilmu pendidikan (FKIP) Universitas Labuhan Batu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpms.v5i1.1438

Penelitian ini bertujuan untuk mengetahui apakah terdapat peningkatan kemampuan koneksi matematis siswa melalui model pembelajaran CTL (Contextual Teaching and Learning), dan untuk mengetahui apakah peningkatan kemampuan koneksi matematis siswa melalui model pembelajaran CTL (Contextual Teaching and Learning) lebih baik dari pada model pembelajaran konvensional.. Sampel penelitian di ambil 2 kelas yang ditentukan dengan teknik random cluster sampling, yaitu kelas XI IPA 3 sebanyak 30 siswa sebagai kelas eksperimen dan kelas XI IPA 2 sebanyak 30 siswa sebagai kelas kontrol. Instrument yang digunakan dalam penelitian ini adalah tes kemampuan koneksi matematis siswa dalam bentuk uraian. Data rata-rata pre-test kelas eksperimen yaitu 40,87 dan rata-rata pre-test kelas kontrol yaitu 40,58. Setelah diberikan perlakuan pada masing-masing kelas diperoleh data rata-rata post-test pada kelas eksperimen sebesar 61,70 dan kelas kontrol sebesar 52,40. Berdasarkan hasil pengujian uji t diperoleh nilai sig < taraf sig (α = 0,05) untuk dk = 58 yaitu 0,000 < 0,05 yang artinya bahwa terdapat perbedaan kemampuan koneksi matematis siswa antara kelas eksperimen dan kelas kontrol dengan kata lain terdapat peningkatan kemampuan koneksi matematis siswa yang diajar menggunakan model CTL (Contextual Teaching and Learning). Berdasarkan uji N-gain pada kelas eksperimen diperoleh indeks gain sebesar 0,53 dengan karakteristik sedang dan pada kelas kontrol diperoleh indeks gain sebesar 0,3 dengan karakteristik rendah.

PENGARUH MATHMAGIC DENGAN MODEL PEMBELAJARAN SCRAMBLE TERHADAP HASIL BELAJAR SISWA Natalia Elisabet Marbun; Rohani Rohani; Rahma Muti'ah; Suriyani Suriyani
MES: Journal of Mathematics Education and Science Vol 5, No 1 (2019)
Publisher : Universitas Islam Sumatera Utara

Abstract. Learning outcomes are a measure of the success of students in learning the material delivered by the teacher. Data on students 'mathematics learning outcomes obtained at Bilah Hulu 2 High School showed that students' mathematics learning outcomes were relatively low so it was necessary to improve them, especially on mathematics subjects. The objectives of this research were to find out knowing the effect of mathmagic on the scramble learning model on student learning outcomes in the subject matter of Inverse Functions. This type of research is quantitative research using The One Group Pre-Post Test test Design. The research instruments used tests of student learning outcomes in the form of multiple choices. Data were analyzed by the T-Test, namely Paired Sample T-Test. The results average learning outcomes of class X MIA 1 Bilah Hulu 2 High School before being taught using mathmagic with a scramble learning model of 10.14 and a standard deviation of 3.563 and after being taught using mathmagic with scramble learning model of 16, 72 and standard deviation 2,987. Because the data obtained from the results of the t-test at a significance level of 0.05 is t count t table that is 16.784 2.045 then Ha is accepted. From these results, it can be concluded that there is a mathmagic influence with the scramble learning model on student learning outcomes by matching the question cards and answer cards available in random circumstances.Keywords: Mathmagic, Scramble, Learning Outcomes

PENGARUH PEMBELAJARAN PROBLEM POSING BERKELOMPOK TERHADAP KEMAMPUAN BERPIKIR ABSTRAK MATEMATIKA SISWA SMP Lily Rohanita Hasibuan; Rohani .
Jurnal Education and Development Vol 7 No 4 (2019): Vol.7.No.4.2019
Publisher : Institut Pendidikan Tapanuli Selatan

Penelitian ini bertujuan untuk: 1) mendeskripsikan kemampuan berpikir abstrak peserta didik yang diajar dengan pembelajaran problem posing berkelompok, 2) mendeskripsikan kemampuan berpikir abstrak peserta didik yang diajar dengan pembelajaran konvensional, 3) menganalisis guna menentukan peserta didik yang memiliki kemampuan berpikir abstrak lebih tinggi. Jenis penelitian adalah penelitian eksperimen dengan postestest only control group design., penelitian ini menggunakan dua kelas yaitu kelas eksperimen yang diajar dengan pembelajaran problem posing berkelompok dan kelas kontrol dengan pembelajaran konvensional. Populasi penelitian ini seluruh peserta didik kelas VII SMP Negeri 2 Rantau Selatan Kabupatan Labuhanbatu yang terdiri dari Sembilan kelas dengan jumlah keseluruhan peserta didik 288 orang. Sedangkan sampel diambil dengan teknik pengacakan kelas sehingga terpilih kelas VII2 sebagai kelas eksperimen dan kelas VII6 sebagai kelas kontrol yang masing-masing terdiri dari 32 orang. Hasil penelitian menunjukkan bahwa (1) kemampuan berpikir abstrak peserta didik dalam pembelajaran matematika melalui pembelajaran problem posing berkelompok berada pada kategori sedang skor rata-rata 39,22, (2) kemampuan berpikir abstrak peserta didik dalam pembelajaran matematika melalui pembelajaran konvensional berada pada kategori sedang skor rata-rata 28,59, (3) kemampuan berpikir abstrak peserta didik kelas VII SMP Negeri 2 Rantau Selatan dengan pembelajaran problem posing berkelompok lebih tinggi daripada peserta didik yang diajar dengan pembelajaran konvensional.

ANALISIS KEMAMPUAN MENYELESAIKAN SOAL CERITA DITINJAU DARI KEMAMPUAN PENALARAN DAN KOMUNIKASI MATEMATIS SISWA Irmayanti; Rohani; Laili Habibah Pasaribu; Indah Fitria Rahma; Rahmi Nazliah
Jurnal Numeracy Vol 7 No 2 (2020)
Publisher : Program Studi Pendidikan Matematika, STKIP Bina Bangsa Getsempena

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46244/numeracy.v7i2.1205

This research is a descriptive qualitative research which aims to describe the students 'ability in solving story problems in terms of students' mathematical reasoning and communication abilities. Reasoning and communication abilities can be identified by solving story problems on two-variable linear equation material based on reasoning and communication indicators in research, namely (1) proposing conjectures, (2) stating everyday events in language or mathematical symbols, (3) estimating answer and solution process, (4) draw conclusions, compile evidence and provide reasons for the correctness of the solution. The selection of the research subjects used a purposive sampling technique. The data collection method was the test method through 3 steps of analysis, namely data reduction, data presentation and conclusion drawing. The results showed that the students' ability in solving story problems in terms of mathematical reasoning and communication abilities was classified as moderate with the average percentage of each indicator, namely: 77% of the indicators proposed a guess; 73% of indicators represent everyday events in language or mathematical symbols; 66% on indicators predicted the answer and solution process; and 50% on indicators draw logical conclusions. Overall, the percentage results obtained an average of 66% in the medium category. From these results it can be concluded that the ability to solve story problems of class X students of SMK Dwi Guna Kampung Pajak in terms of mathematical reasoning and communication abilities of students is classified as moderate. Abstrak Penelitian ini merupakan penelitian kualitatif deskriptif yang bertujuan untuk mendeskripsikan kemampuan siswa dalam menyelesaikan soal cerita ditinjau dari kemampuan penalaran dan komunikasi matematis siswa. Kemampuan penalaran dan komunikasi dapat diidentifikasi dagan menyelesaikan soal cerita pada materi persamaan linier dua variable yang dibuat berdasarkan indikator penalaran dan komunikasi dalam penelitian yaitu (1) mengajukan dugaan, (2) menyatakan peristiwa sehari-hari dalam bahasa atau simbol matematika, (3) memperkirakan jawaban dan proses solusi, (4) menarik kesimpulan, menyusun bukti dan memberikan alasan terhadap kebenaran solusi. Pemilihan subjek penelitian ini menggunakan teknik purposive sampling. Metode pengumpulan data dengan metode tes melalui 3 langkah analisis yaitu reduksi data, penyajian data dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa kemampuan siswa dalam menyelesaikan soal cerita ditinjau dari kemampuan penalaran dan komunikasi matematis tergolong sedang dengan hasil rata-rata persentase tiap indikator yaitu: 77% pada indikator mengajukan dugaan; 73% pada indikator menyatakan peristiwa sehari-hari dalam bahasa atau simbol matematika; 66% pada indikator memperkirakan jawaban dan proses solusi; dan 50% pada indikator menarik kesimpulan yang logis. Secara keseluruhan hasil persentase didapat rata-rata sebesar 66% masuk kategori sedang. Dari hasil tersebut disimpulkan bahwa kemampuan menyelesaikan soal cerita siswa kelas X SMK Dwi Guna Kampung Pajak ditinjau dari kemampuan penalaran dan komunikasi matematis siswa tergolong berkemampuan sedang. Kata Kunci: Kemampuan Penalaran dan Komunikasi, Kualitatif Deskriptif, Menyelesaikan Soal Cerita, Dwi Guna Kampung Pajak

Design a Web-Based Covid 19 Assistance Information System Rudi Ardiansyah Siregar; Muhammad Halmidar; Rohani
Jurnal Mantik Vol. 5 No. 1 (2021): May: Manajemen, Teknologi Informatika dan Komunikasi (Mantik)
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/mantik.Vol5.2021.1267.pp70-77

Covid-19 assistance is a difficult challenge to solve since it is affected by various intertwined variables, including income status, health, education, and living conditions. Beneficiary data collection must be performed correctly. As a result, the Labuhanbatu Regency Social Service should have a computerized system to monitor Covid-19 recipients based on income and living conditions. Waterfall models are used in the development of Information Systems to help the study, and the UML used is PHP programming language, MySql Database, Boostrap, and Sublime Document. As a consequence of the study's findings, Covid-19 Beneficiary Community Data Collection Based on Income and Home Conditions was implemented. This method will provide complete and correct information based on the covid-19 beneficiary community's requirements, presented in pdf format.

KEMAMPUAN BERPIKIR KRITIS MATEMATIKA SISWA MELALUI MODEL PEMBELAJARAN KOOPERATIF TIPE THINK PAIR SHARE Rohani Rohani; Marzuki Ahmad; Ilham Sahdi Lubis; Dwi Putria Nasution
AKSIOMA: Jurnal Program Studi Pendidikan Matematika Vol 11, No 1 (2022)
Publisher : UNIVERSITAS MUHAMMADIYAH METRO

This study aims to describe the improvement of students' Mathematical Critical Thinking Ability (MCTA) through the Think Pair Share (TPS) Cooperative learning model. This type of research is a quasi-experimental with Nonequivalent Control Group Design. The population in this study were students of class X SMA Negeri 2 Padangsidimpuan. Through purposive sampling, research samples were taken from class X IIS 2 as the experimental group and class X IIS 1 as the control group. The research instrument includes an observation sheet on learning activities and student MCTA tests which include pretest and posttest questions. Data analysis using N-gain score, t-test. Analysis of the observational data showed the average value of learning management with a score of 4.48. Obtaining N-Gain with t-test on student MCTA data obtained a significance of <0.05. The average acquisition of the N-gain MCTA index of students in the experimental class was 0.42 and in the control class was 0.29. Through two-way ANOVA at the gender level with a learning model to improve students' MCTA, a significance of 0.736>0.05 was obtained. It was concluded that the application of TPS-type cooperative learning in improving students' MCTA was good. The TPS-type cooperative learning model's improvement was better than the regular MCTA of students.

Rancang Alat Pengukur Tinggi Badan Dengan Output Suara Berbasis Arduino Uno Yandri Lesmana Yandri Lesmana; Iwan Purnama; Rohani
Bulletin of Information Technology (BIT) Vol 4 No 2: Juni 2023
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/bit.v4i2.697

In every health test, of course, there is a measurement of height, so that a person's height can be measured, starting from the soles of the feet to the head, the height measuring device used is still manual, which uses a meter and the measurement process in done by someone to measure the height of someone who wants to know his height so that the results of these measurements require more time when the number of people measured is more than 20 people in other words the manual height meter is less effective when used during the recruitment period of new employees started. With these constraints, the authors created a tool that can measure height automatically by utilizing an Ultrasonic sensor as a measuring tool and an Arduino Uno microcontroller as a control center by displaying measurement results on a 16x2 LCD screen. In this result it can replace the manual height measuring device so that it helps the activities of workers in carrying out their noble duties to provide health services to the general public.

Implementation of Convolutional Neural Network (CNN) Method in Determining the Level of Ripeness of Mango Fruit Based on Image Mei Wita Sari; Sahat Parulian Sitorus; Rohani; Rahmadani Pane
Jurnal Penelitian Pendidikan IPA Vol 11 No 5 (2025): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i5.11436

This study aims to classify the ripeness level of mango fruit using a Convolutional Neural Network (CNN) model based on digital images. This classification is important to help the automatic sorting process in the agricultural industry that relies on accuracy in determining fruit quality. Based on the literature review, CNN has been widely used in image-based object recognition because of its ability to extract visual features automatically. Previous studies have shown that CNN is effective in image classification, but the results are highly dependent on the quality of the data and the model parameters used. This research method involves collecting mango fruit images at three levels of ripeness (raw, half-ripe, ripe), which are then processed and analyzed using the Orange application with CNN architecture. Model evaluation was carried out using accuracy metrics, AUC, confusion matrix, and visualization through box plots and scatter plots to see the distribution and differences in data between classes. The results showed that the CNN model obtained an accuracy of 53.3% and an AUC value of 0.717, which indicates the model's initial ability to distinguish ripeness categories but with a fairly high level of misclassification. There is still overlapping data between classes, especially between the raw and half-ripe classes, which indicates the need for additional features and parameter refinement. In conclusion, CNN has the potential to be used in classifying the ripeness level of mango fruit, but its performance can be improved through feature development and deeper model tuning.

Co-Authors Indah Fitria Rahma Irmayanti Iwan Purnama Laili Habibah Pasaribu Lily Rohanita Hasibuan lubis, ilham sahdi Marzuki Ahmad Mei Wita Sari Muhammad Halmi Dar Nasution, Dwi Putria Natalia Elisabet Marbun Pane, Rahmadani Rahma Muti’ah Rahmi Nazliah Rudi Ardiansyah Siregar Sitorus, Sahat Parulian Suriyani Suriyani Suriyani Suriyani Yandri Lesmana Yandri Lesmana

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