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All Journal LEMMA: Letters Of Mathematics Education BAREKENG: Jurnal Ilmu Matematika dan Terapan Pelita Eksakta Jurnal Litbang Edusaintech Journal of Mathematics UNP

Riry Sriningsih

Department Of Mathematics, Faculty Of Mathematics And Natural Science, Universitas Negeri Padang, Indonesia

Author-ID : 2756495

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Physics Transportation Other

Published : 24 Documents Claim Missing Document

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Articles

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Pengaruh Hukuman Mati terhadap Dinamika Jumlah Pengguna Narkoba di Indonesia Sriningsih, Riry
JURNAL LEMMA Vol 1, No 2 (2015): LEMMA : Letters of Mathematics Education
Publisher : Universitas PGRI Sumatera Barat

Tulisan ini membahas model matematika dinamika jumlah pengguna narkoba dengan memperhatikan hukuman mati yang sudah diberlakukan pemerintah Indonesia. Tujuannya untuk melihat seberapa besar dampak hukuman mati tersebut terhadap dinamika jumlah pengguna narkoba di Indonesia. Model matematika dari permasalahan ini dinyatakan dalam bentuk sistem persamaan diferensial nonlinierberdasarkan asumsi-asumsi yang digunakan. Selanjutnya model yang sudah dibentuk, dianalisis dan hasilnya diinterpretasikan kembali ke masalah nyata

Eksistensi dan Kestabilan Model SIR dengan Nonlinear Insidence Rate Soleh, Mohammad; Sriningsih, Riry
JURNAL LEMMA Vol 1, No 1 (2014): LEMMA : Letters of Mathematics Education
Publisher : Universitas PGRI Sumatera Barat

Diberikan model epidemi SIR dengan laju insidensi penularan berbentukbI 2 S . Pada model tersebut diselidiki eksistensi dan kestabilan titik ekuilibrium bebas penyakit dan endemik. Berdasarkan hasil penyelidikan didapat bahwa, terdapat satu titik ekuilibrium bebas penyakit dan dua buah titik ekuilibrium endemik. Titk ekuilibrium bebas penyakit stabil global, sedang titik ekuilibrium endemik masing-masing stabil lokal untuk suatu kondisi yang dipersyaratkan

Improved Teacher Scientific Publication Competency Based On Sustainable Professional Development at Tanbisaw Riry Sriningsih
Pelita Eksakta Vol 1 No 02 (2018): Pelita Eksakta Vol. 1 No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol1-iss02/32

Based on observations, the results of questionnaires and discussions with elementary school teachers in Tanbisaw, Kubung Subdistrict, Solok Regency, found two main factors causing the majority of teachers to be heavy and difficult to publish their writings, namely: 1) Motivation and 2) Substance. Most teachers state that procedures for making scientific works and publications have criteria that are too difficult to fulfill or follow. The teacher has not found any material that is worth writing. The teacher stated that they did not have the time to do research and look for reading sources to write. The purpose of this activity is to motivate and improve the competence of teachers in producing scientific publications in carrying out their duties through Sustainable Professional Development. Specifically, the aim is to: 1) direct teachers to produce research ideas, 2) guide teachers in compiling scientific publications, and 3) inform and direct teachers to publish works at national seminars and scientific journals. The activity was held at SDN 02 Tanjung Bingkung, with participants being elementary school teachers consisting of 8 elementary schools, the methods used were: lecture methods, guided training, discussion and direct practice in writing and making scientific papers to be published.

PENINGKATAN KETERAMPILAN GURU SEKOLAH DASAR MENGGUNAKAN MEDIA INTERAKTIF UNTUK MATERI GEOMETRI DAN PECAHAN Riry Sriningsih; Dewi Murni; Helma Helma
Pelita Eksakta Vol 1 No 1 (2018): Pelita Eksakta Vol. 1 No. 1
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol1-iss1/4

Based on observations, questionnaires and discussions with some of teacher of elementary school found many problems geometric and fraction material. The problems are: 1. In general, teachers have not used interactive media in explaining mathematic materials, so students are difficult to understand the subject, 2. Teachers have not yet facilitated various learning styles of students, 3. Students' assumptions on difficult mathematical subjects (full of numbers and symbols), so they are phobic with math, 4. Teachers urgently need the consolidation of geometrical and fraction materials through the creation of interactive media that match the material and characteristics of students, 5. Teachers desperately need training on how to design and create interactive media that can interest students to learn on geometry and fraction materials, so that students are no longer fobs with math and can easily understand the material well, 6. Teachers desperately need training on the use / utilization of interactive media that has been created in teaching the geometry and fraction materials. To solve the problem, team try to provide solutions to these problems by providing training on how to design, create and use interactive media especially plane geometry and fraction. The result of training, teachers are already able to design and make interactive media. They can explain plane geometry and fraction material easily, especially how to find the formula of area for instance rectangle, triangle, trapezium, etc. Further impact, students more easily understand the material well.

Flexibility of Nonparametric Regression Spline Truncated on Data without a Specific Pattern Andrea Tri Rian Dani; Narita Yuri Adrianingsih; Alifta Ainurrochmah; Riry Sriningsih
Jurnal Litbang Edusaintech Vol. 2 No. 1 (2021): Volume 2 No 1 2021
Publisher : Litbang PWM Jawa Tengah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51402/jle.v2i1.30

Bentuk pola hubungan antara variabel prediktor dan variabel respon ada yang diketahui, namun pada nyatanya ada pula yang tidak diketahui. Apabila bentuk pola hubungan antara variabel respon dan variabel prediktor tidak diketahui, pendekatan regresi nonparametrik merupakan pendekatan yang paling sesuai. Pendekatan regresi nonparametrik tidak tergantung pada asumsi bentuk kurva regresi tertentu, sehingga akan memberikan fleksibilitas yang tinggi. Salah satu estimator regresi nonparametrik yang terkenal adalah spline truncated. Spline truncated merupakan potongan-potongan polinomial yang memiliki sifat tersegmen dan kontinu. Pada penelitian ini, akan disimulasikan pola hubungan antara kedua variabel yaitu respon dan prediktor yang tidak memiliki pola tertentu, yang kemudian didekati dengan dua pendekatan regresi, yaitu parametrik dan nonparametrik. Berdasarkan ukuran kebaikan estimasi kurva regresi menggunakan koefisien determinasi diperoleh hasil bahwa pendekatan regresi nonparametrik lebih baik daripada pendekatan regresi parametrik. Hal ini dikarenakan pendekatan regresi nonparametric memiliki fleksibilitas yang tinggi sehingga mampu menyesuaikan sendiri bentuk estimasi kurva regresi.

Pengukuran Efisiensi Komoditi Industri Kerajinan Kabupaten Agam Menggunakan Metode Data Envelopment Analysis (DEA) Nurainun Pulungan; Arnellis Arnellis; Riry Sriningsih
Journal of Mathematics UNP Vol 4, No 1 (2019): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract – Small and medium industries of Agam regency consist of five groups where one of them is craft industry that has a number of business units in Agam regency. To get more profit, measurement of efficiency needs to be done to improve productivity of craft industry. Method to measure level of efficiency is Data Envelopment Analysis (DEA) method. DEA method is linear programming model based on the measurement of efficiency a Decision-Making Unit (DMU) and uses a lot of inputs and outputs. The units will be measured those efficiency are commodities of craft industries with the production capacity of quantity unit. The measurement of efficiency commodities generates efficient and inefficiency DMU by using model of DEA. The level efficiency of inefficient DMU can be improved by utilizing the value of slack variables. After target calculation for improvements inefficient DMU and measurements of efficiency is again so that value of efficiency increases.Keywords – Efficiency, Data Envelopment Analysis, Inefficiency, Slack, Target.

Model Mangsa Pemangsa dengan Pengaruh Musim yudi Arpa; Muhammad Subhan; Riry Sriningsih
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract- Effect of season is one of the factors that need to be noted in the predation. In this study, used the four seasons, summer, winter, spring, and autumn, where the amount of predation different every season. The study began by establishing a mathematical model of predation to the effect of the season. In this model, the population is divided into two, prey populations and predator populations. With useful analysis model using perturbation theory note that the effect of the season had a significant effect on the growth patterns of prey and predator populations, where at any given time pattern of prey and predator population Growth Is changing. Keyword :Predator-Prey, Seasonal effect, Mathematical models, Perturbation theory.

Portofolio Mean Variance Efficient Dua Konstrain Pada 15 Saham Indeks LQ45 Fariz Rivalno; Dewi Murni; Riry Sriningsih
Journal of Mathematics UNP Vol 4, No 1 (2019): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract – Portfolio is an investment tool in stocks that divide capital into a number of stocks according to the weight or percentage determined by the investor. For that, investors need to establish an optimal portfolio. One of the optimal portfolio methods is Mean Variance Efficient Two Constraints Portfolio. The purpose of this study is to obtain a formula for determining the investment weight and its application onMean Variance Efficient Two Constraints Portfolio to obtain minimal investment risk from 15 LQ45 Index stocks. The type of this research is applied research. The type of data is secondary data, in the form of closing pricestocks on the LQ45 Index period of November 9th, 2016 - March 2nd, 2017. Steps in the establishment of a portfolio is calculate the return, average return, variance return, covariance return, and find weight investment through formula on the portfolio. The result of this research is obtained a formula for determining the investment weight on Mean Variance Efficient Two Constraints Portfolio and formed an optimal portfolio on 15 LQ45 Index stocks. The portfolio provides 0.07% average return and 0.01% risk. Keywords –Constraint, LQ45 Index, Portfolio, Return, Stocks

Analisis Korelasi Kanonik Hubungan Lingkungan Pendidikan terhadap Prestasi Belajar Riski Dwi Rianto Putra; Atus Armadi Purta; Riry Sriningsih
Journal of Mathematics UNP Vol 6, No 2 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract – The learning achievement is the result of learning achieved in the form of value. Environmental education is one of the factors that influence learning achievement. To see the relationship between environmental education with student achievement SMP Lanud Padang used statistical analysis canonical correlation analysis. Canonical correlation analysis is used to see the relationship between dependent variables with independent variables. The results showed that the relationship between environmental education with student achievement class VII Space Lanud Padang can not be known, because the analysis could not proceed to the stage interpretation of the canonical variables. However, based on the value of the P-Value between environmental variables and the variables education learning achievement can be seen learning achievement is affected by a significant educational environment, including PAI, PKN, Indonesian and English. And school environments have the most impact on student learning in junior high presatasi Space Lanud Padang. Keywords – Learning achievement, environmental education, canonical correlation analysis

Model Matematika Jumlah Pemakai Narkoba dengan Program Rehabilitasi Eli Yuliza; Media Rosha; Riry Sriningsih
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract–In the number of drug users in Indonesia each year has increased very significantly, so this problem should be addressed immediately.Currently, the government has organized rehabilitation program that is expected to reduce the number of drug users in the future. To predict the number of drug users, can be done by creating a mathematical model of the number of drug users. Mathematical model number of drug users in rehabilitation programs dividing the population into four groups of individuals: the group of susceptible individuals for drug use, drug user groups of individuals, groups of individuals are rehabilitated, and a group of individuals who have stopped using drugs. Mathematical model that formed were analyzed by looking at the stability, the analysis of mathematical models obtained two types of fixed points. In the number of drug users is affected by four parameters: the level of interaction between individuals prone to drug use by individual drug users, the level of individual drug users to be individuals who stop using drugs, and individual level drug offenders to be rehabilitated individuals. Keywords–Drugs, mathematical model, fixed point.

Co-Authors Alifta Ainurrochmah Annisya Annisya Arnellis Arnellis Athifah Rahmi Atus Armadi Purta Dani, Andrea Tri Rian Dewi Murni Dony Permana Eli Yuliza Ermawati Ermawati Fariz Rivalno Helma Helma Helma Helma Hendra Syarifuddin Idhia Sriliana Iswarnedi Iswarnedi Jamhari Jamhari Khairil Amri Media Rosha Media Rosha Meri Mulyani Minora Longgom Nasution Mirna Mirna Mohammad Soleh Muhammad Subhan MUHAMMAD SUBHAN Mulyadi Mulyadi NARITA YURI ADRIANINGSIH Nurainun Pulungan Randy Rahayu Melta Raudhatul Jannah A.M Resti Indrawati Utami Riski Dwi Rianto Putra rizky hamdanih Rozi Wahyudi Vhinasy Andari Yoga Perdana yudi Arpa

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