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MODEL PEMBELAJARAN HYPOTHETICAL LEARNING TRAJECTORY: DAMPAK KEMAMPUAN REPRESENTASI MATEMATIS BERBASIS GENDER Kiki Ambar Sari; Achi Rinaldi; Siska Andriani
AdMathEdu : Jurnal Ilmiah Pendidikan Matematika, Ilmu Matematika dan Matematika Terapan Vol 11, No 1: Juni 2021
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/admathedu.v11i1.19874

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran HLT (Hypothetical Learning Trajectory) terhadap kemampuan representasi matematis ditinjau dari perbedaan gender. Metode yang digunakan dalam penelitian ini adalah Quasy Experimental Design. Populasi penelitian ini adalah seluruh peserta didik kelas VII SMPN 3 Tumijajar Tulang Bawang Barat. Teknik pengambilan sampel dilakukan dengan teknik acak kelas, sehingga kelas VII E sebagai kelas eksperimen dan kelas VII D sebagai kelas kontrol. Hasil penelitian dan pembahasan perhitungan uji anava dua jalan dengan sel tak sama, diperoleh hasil bahwa terdapat pengaruh model pembelajaran HLT dan model pembelajaran konvensional terhadap representasi matematis peserta didik. Berdasarkan perhitungan analisis data terlihat bahwa tidak terdapat perbedaan kemampuan representasi matematis peserta didik ditinjau dari gender. Berdasarkan perhitungan analisis data terlihat bahwa tidak terdapat intaraksi antara model pembelajaran dan perbedaan gender terhadap kemampuan representasi matematis peserta didik.
Perbandingan FPCA dan FPCR dalam Pemodelan Data Curah Hujan Kabupaten Indramayu Rinaldi, Achi
GRADIEN : Jurnal Ilmiah MIPA Vol 11, No 1 (2015): (Januari 2015)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.699 KB)

Abstract

  This research was aimed to modelling rainfall in Indramayu based on the information from Sukadana rainfall station. Modelling rainfall data were very usefull for some prediction in the future and for government policy which can prevent some disaster like flood. Statistics methods in this paper were Principal Component Analysis (PCA), Principal Component Regression (PCR), Functional Principal Component Analysis (FPCA), and Functional Principal Component Regression (FPCR).Principal Component Regression (PCR) perform a good result compare with Functional Principal Component Regression (FPCR), but without basis function the both method are equal. R2 value for PCR was 50.13 the same with  FPCR without basis function.RMSEP value and correlation were 77.55 and 0.91 and it showed that PCR was better than FPCR with bspline basis function and fourrier which the value were 110.48 and 0.81, also 136,06 and 0.1. For general FPCR model without basis function was showed the best performance especially FPCR central model that give prediction result for rainfall data was better than the other model. 
Geogebra pada Aplikasi Sigil sebagai Pengembangan E-modul Pembelajaran Matematika Riska Fitriana; Achi Rinaldi; Suherman Suherman
PRISMA Vol 10, No 1 (2021): PRISMA Volume 10, No 1 Tahun 2021
Publisher : Universitas Suryakancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35194/jp.v10i1.1118

Abstract

Penelitian pengembangan ini bertujuan untuk mengetahui kelayakan e-modul pembelajaran matematika berbasis aplikasi sigil berbantuan geogebra pada peserta didik SMP/MTs kelas VIII, dan untuk mengetahui respon peserta didik dan pendidik terhadap e-modul pembelajaran matematika berbasis aplikasi sigil berbantuan geogebra. Jenis penelitian yang dilakukan adalah dengan metode penelitian dan pengembangan (R&D) dengan menggunakan model 4D (Define, Design, Development, Disseminate). Instrumen yang digunakan pada penelitian ini, yaitu non tes. Instrumen-instrumen ini diberikan sesuai dengan subjek pada penelitian pengembangan. Teknik analisis data yang dilakukan adalah analisis data kualitatif dan analisis data kuantitatif yang diperoleh dari hasil validasi ahli materi, ahli media, dan ahli bahasa, serta respon peserta didik,dan respon guru terhadap bahan ajar e-modul pembelajaran matematika pada materi lingkaran SMP kelas VIII. Hasil dari kelayakan oleh validator ahli materi, ahli media, dan ahli bahasa terhadap e-modul memperoleh kriteria sangat layak digunakan, dan hasil kemenarikan e-modul yang diperoleh dari  data angket peserta didik dengan jumlah 80 responden, terdiri dari uji kelas kecil, dan kelas besar memperoleh kriteria sangat menarik. Sehingga dapat disimpulkan e-modul pembelajaran matematika berbasis aplikasi sigil berbantuan geogebra pada peserta didik SMP/MTs kelas VIII pada materi lingkaran memberikan hasil yang baik dan layak untuk digunakan
PENGEMBANGAN MEDIA AJAR MATEMATIKA DENGAN MENGGUNAKAN MEDIA MICROSOFT VISUAL BASIC UNTUK MENINGKATKAN KEMAMPUAN MATEMATIS MAHASISWA (Adopsi Langkah Teori Pengembangan Borg & Gall) Rinaldi, Achi
JURNAL e-DuMath Vol 4, No 1 (2018)
Publisher : JURNAL e-DuMath

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26638/je.547.2064

Abstract

AbstractThe purpose of this study is to determine the development of mathematics teaching materials on matrix materials using Microsoft Visual Basic media that is easy to understand learners and quality according to expert materials and programming experts. Based on the assessment of material experts, these teaching materials are included in the criteria very well, with a feasibility level of 87%. Based on the assessment of media experts, this resource is included in very good criteria, with a degree of eligibility of 88%. Based on the results of the test on the learners, this instructional material is included in the criteria very well, with a feasibility level of 86%. Based on the assessment of educational practitioners, these teaching materials are included in very good criteria, with a feasibility level of 86%. So it can be concluded that the end result of the development of this resource is suitable to be used as teaching material of Algebra Liner on matrix material. The final product of this resource is a product that has passed the first and second revision stage. This resource is software that runs on Windows XP, Seven, 77 and Windows 8 and the name "SolusiMatrix".Keywords: Matrix, programming, Microsoft Visual Basic.. 
Pemahaman Konsep Peserta Didik dengan Menggunakan Graded Response Models (GRM) Tama, Arfani Manda; Rinaldi, Achi; Andriani, Siska
Desimal: Jurnal Matematika Vol 1, No 1 (2018): Desimal: Jurnal Matematika
Publisher : UIN Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (884.071 KB) | DOI: 10.24042/djm.v1i1.2041

Abstract

The objective of the study was to analyze the students comprehension ability concept by using Graded Response Models (GRM). This research is a type of qualitative research with descriptive approach. The subjects of the study were students of class VIII of 6 people by purposive sampling. Technique of collecting data is done by written test (essay) and interview. Data analysis technique is using Graded Response Models (GRM) test, which is then combined with data reduction, data presentation, and conclusion. The results showed that students who have high ability category of 18.19%, 60.6% moderate students, and low-ability students 21.21%. This can be seen from the scores obtained from the students ability to comprehend the concept of mathematical concepts, and obtained the graph of parameter estimation results by using Graded Response Models can be increased from the lowest ability of learners that is θ (-4) to the highest ability of learners ie θ (4) for each item item category.
Pengembangan Modul Pembelajaran Matematika Berbasis Etnomatematika Menggunakan Metode Inkuiri Mardiah, Siti; widyastuti, Rany; Rinaldi, Achi
Desimal: Jurnal Matematika Vol 1, No 2 (2018): Desimal : Jurnal Matematika
Publisher : UIN Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (823.185 KB) | DOI: 10.24042/djm.v1i2.2228

Abstract

This research entitled Development of Mathematics Based Module of Ethnomathematics using Inkuiri method. This study aims to find out how the development of mathematics learning module based on ethnomathematics using inquiry method, and to know the teacher and student response to the development of mathematics learning module based on ethnomathematics using inquiry method. This research method is Research and Development (R&D) using 4D model. Based on the results of the validation of stage 1 by the material experts obtained a cumulative average of 65.36% with the criteria of "good enough" which means that there is an improvement of some aspects contained in the module. After performing a series of revisions, the average score of cumulative of 84.02% validation with "good" criterion was obtained, so there is no revision of the module. The average score of cumulative validation of stage 1 by a media expert is 60% with a "good enough" code which means that it needs to be revised in some parts of the module. In the second stage of validation, the average cultivation is 86.66% with "very good" criteria so that the module is valid and ready for a field trial. From the results of research teacher response to the module obtained an average of 86.15% with the criteria "very interesting". In the small group trial, the average of 85% was obtained with interesting criteria and large group trial obtained an average of 87.28% with very interesting criteria so that the module is feasible and ready to be used as teaching materials.
Sebaran Generalized Extreme Value (GEV) Dan Generalized Pareto (GP) untuk Pendugaan Curah Hujan Ekstrim di Wilayah DKI Jakarta Achi Rinaldi
Al-Jabar: Jurnal Pendidikan Matematika Vol 7, No 1 (2016): Al-Jabar: Jurnal Pendidikan Matematika
Publisher : Universitas Islam Raden Intan Lampung, INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (811.148 KB) | DOI: 10.24042/ajpm.v7i1.137

Abstract

Extreme event such as extreme rainfall have been analyzed and most concern for the country all around the world. There are two common distribution for extreme value which are Generalized Extreme Value distribution and Generalized Pareto distribution. These two distribution have shown good performace to estimate the parameter of  extreme value. This research was aim to estimate parameter of extreme value using GEV distribution and GP distribution, and also to characterized effect of extreme event such as flood. The rainfall data was taken from BMKG for 5 location in DKI Jakarta. Both of distribution shown a good perfromance. The resut showed that Tanjung Priok station has biggest location parameter for GEV and also the biggest scale parameter for GP, that mean the biggest probability to take flood effect of the extreme rainfall.
Penerapan Sebaran Generalized Extreme Value (Gev) untuk Menduga Kejadian Ekstrim Rinaldi, Achi
Prosiding Seminar Nasional Matematika dan Pendidikan Matematika Vol 2, No 1 (2019): Prosiding Seminar Nasional Matematika dan Pendidikan Matematika 2019
Publisher : Prodi Pendidikan Matematika UIN Raden Intan Lampung

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

Abstract

The Generalized Extreme Value (GEV) is a distribution that can describe extreme values. Modeling for extreme values is very useful in estimating extreme events, such as extreme rainfall that can cause flooding. This study aims to make extreme rainfall models through the spatial effect that succeed in forming special zones. In addition,  it is also studied on time series patterns that can be explained through extremogram. The effect of spatial and time series are then modeled spatiotemporally by the Bayes hierarchy method through the concept of Integrated Laplace Approximation (INLA). The application of models for extreme values with GEV is expected to be a reference for policymakers, especially in the context of disaster mitigation due to extreme events.
Pemahaman Konsep Peserta Didik dengan Menggunakan Graded Response Models (GRM) Arfani Manda Tama; Achi Rinaldi; Siska Andriani
Desimal: Jurnal Matematika Vol 1, No 1 (2018): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (884.071 KB) | DOI: 10.24042/djm.v1i1.2041

Abstract

The objective of the study was to analyze the students' comprehension ability concept by using Graded Response Models (GRM). This research is a type of qualitative research with descriptive approach. The subjects of the study were students of class VIII of 6 people by purposive sampling. Technique of collecting data is done by written test (essay) and interview. Data analysis technique is using Graded Response Models (GRM) test, which is then combined with data reduction, data presentation, and conclusion. The results showed that students who have high ability category of 18.19%, 60.6% moderate students, and low-ability students 21.21%. This can be seen from the scores obtained from the students' ability to comprehend the concept of mathematical concepts, and obtained the graph of parameter estimation results by using Graded Response Models can be increased from the lowest ability of learners that is θ (-4) to the highest ability of learners ie θ (4) for each item item category.
GENELARIZED PARETO UNTUK PENDUGAAN CURAH HUJAN EKSTRIM DI 4 STASIUN BMKG PROVINSI LAMPUNG Nurrasiah, Nurrasiah; Anggraini, Dian; Meriyati, Meriyati; Rinaldi, Achi
TRANSFORMASI Vol 3 No 02 (2019): Transformasi: Jurnal Pendidikan Matematika dan Matematika
Publisher : Pendidikan Matematika FMIPA Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/tr.v3i02.749

Abstract

Curah hujan ekstrim adalah satuan yang menggambarkan besarnya air yang turun melebihi kapasitas. Dampak yang dapat ditimbulkan dari curah hujan ekstrim salah satunya adalah banjir. Salah satu distribusi umum untuk nilai ekstrim yaitu distribusi Generalized Pareto (GP). Tujuan dari penelitian ini adalah mendapatkan estimasi parameter bentuk dan skala dari distribusi Generalized Pareto (GP) dan dari kedua parameter tersebut dapat diketahui karakter curah hujan di 4 Kabupaten Provinsi Lampung. Metode penelitian ini adalah Peaks Over Threshold (POT), dalam hal ini peneliti melakukan studi literatur yang berkaitan dengan curah hujan ekstrim. Hasil penelitian menunjukkan nilai dugaan parameter skala (σ) tertinggi di miliki oleh Kabupaten Pesawaran, sedangkan yang terendah di Kabupaten Mesuji. Parameter bentuk (θ)nilai tertinggi di Kabupaten Mesuji dan yang terendah di Kabupaten Pesawaran. Dapat disimpulkan bahwa daerah yang paling rawan terhadap banjir adalah Kabupaten Pesawaran, sedangkan yang berpeluang kecil terjadinya banjir adalah Kabupaten Mesuji.