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All Journal PROSIDING SEMINAR NASIONAL Journal of Natural Sciences and Mathematics Research BAREKENG: Jurnal Ilmu Matematika dan Terapan Biosel: Biologi Science and Education Gorontalo Journal of Public Health Jurnal Darma Agung Journal of Educational Chemistry (JEC) Cendikia : Media Jurnal Ilmiah Pendidikan JURNAL INOVASI DAN PENGABDIAN MASYARAKAT INDONESIA Journal of Learning Improvement and Lesson Study Science Education and Development Journal Archives Journal of Multidisciplinary Research and Innovation (JMRI) Prosiding Seminar Nasional Unimus
Endang Tri Wahyuni Maharani
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Improving high school students understanding through cooperative learning on atomic structure material Prasetyo, Muhammad Hadi; Maharani, Endang Tri Wahyuni
Cendikia : Media Jurnal Ilmiah Pendidikan Vol 14 No 6 (2024): July: Education Science
Publisher : Institute of Computer Science (IOCS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/cendikia.v14i6.5320

Abstract

The learning of high school chemistry is divided into two phases, E and F. One of the materials in phase E that is difficult for students to understand is atomic structure. The objective of this study is to ascertain the impact of cooperative learning on students' comprehension. The comprehension of learners can be gauged by the outcomes of their learning during cooperative learning. The research was conducted at SMA Negeri 15, Semarang City, Central Java on 10 February 2024. The subject of the research was the entire X2 class of SMAN 15 Semarang in the academic year 2023-2024, comprising 36 students: 18 male and 18 female.  The study employed a one-group pretest-posttest design. The objective of this study was to assess the impact of cooperative learning on students' learning outcomes. The study comprised three stages: a pre-test, a treatment period, and a post-test. The students' scores on the pretest ranged from 40.00 to 75.00, while their scores on the posttest ranged from 60.00 to 90.00. The values obtained from the pre-test and post-test were added to the data set and analysed using the normalised gain (N-Gain) test. The N-Gain test results indicated a value of 0.48, which signifies that the students' perception of their understanding of chemical concepts increased when they were taught using a cooperative learning model. Consequently, the endeavour to enhance students' comprehension of chemical concepts pertaining to atomic structure through the utilisation of a cooperative learning model was a resounding success.
Implementation of STEM-Integrated PjBL Based on Lesson Study: Improving Students' Critical Thinking Skills Nurdiana, Lizza; Winaryati, Eny; Maharani, Endang Tri Wahyuni; Ikhsan, Zanaton H; Rauf, Rose Amnah Abd; Salaffudin, Affan
JEC Vol. 6 No. 2 (2024)
Publisher : Department of Chemistry Education, Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jec.2024.6.2.22640

Abstract

This study aims to examine the application of lesson study design on chemistry material in improving critical thinking skills of students in class XI-2 SMA Negeri 2 Semarang. The research was conducted for three meetings involving the implementation of Project-Based Learning (PjBL) learning model with STEM (Science, Technology, Engineering, Mathematics) approach. The lesson study stages included planning, implementation, and reflection focusing on reaction rate material, involving students in collaborative activities such as designing and testing simple tools. The results showed that the application of the STEM-based PjBL model significantly improved students' critical thinking skills. This improvement can be seen from students' ability to identify, analyse, and solve problems based on relevant theories. The learning activities implemented, such as group discussions and windows shopping activities, also play an important role in improving interaction and collaboration between students. The implementation of STEM in PjBL not only deepens students‘ understanding of chemical concepts, but also increases students’ interest and active participation in the learning process. This study concludes that the application of STEM-based PjBL learning model, collaborated with lesson study, is able to improve critical thinking skills and the quality of chemistry learning on reaction rate material.
Analisis Efektivitas Ecoenzym Dari Limbah Organik Kulit Mentimun Sebagai Pengawet Tomat Mahmudah, Ninda Aulia; Maharani, Endang Tri Wahyuni; Astuti, Andari Puji
Biosel Biology Science and Education Vol. 10 No. 2 (2021): BIOSEL (Biology Science and Education: Jurnal Penelitian Sains dan Pendidikan)
Publisher : INSTITUT AGAMA ISLAM NEGERI AMBON

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (283.751 KB) | DOI: 10.33477/bs.v10i2.2218

Abstract

Tomat (Solanum Lycopersicum) merupakan salah satu sayuran serta buah-buahan yang di gemari oleh masyarakat di Indonesia. Masa simpan tomat saat sudah matang memerah hanya membutuhkan waktu 1-2 hari ditempat terbuka hingga membusuk. Oleh sebab itu untuk mencegah pembusukan pada tomat dapat dilakukan cara pengawetan. Metode pengawetan buah yang paling baik adalah pengawetan alami secara biologis dengan larutan ecoenzym. Salah satu bahan alami untuk mengawetkan tomat adalah dengan memanfaatkan ecoenzym dari limbah organik kulit mentimun. Sehingga tujuan dari penelitian ini adalah untuk mengetahui persentase volume produksi ecoenzym dengan variasi gula, perubahan tekstur pengawetan tomat setelah di semprot ecoenzym, dan perubahan aroma pengawetan tomat setelah di semprot ecoenzym. Ecoenzym yang menggunakan gula merah menghasilkan cairan ecoenzym dengan jumlah lebih banyak yaitu 3,2 liter dengan persentase volume ecoenzym adalah 95%. Ecoenzym yang menggunakan gula pasir menghasilkan cairan ecoenzym dengan jumlah volume lebih sedikit yaitu 2 liter dengan persentase volume ecoenzym adalah 61% Ecoenzym dari limbah kulit mentimun terbukti dapat menghambat pertumbuhan mikroorganisme penyebab kebusukan pada tomat. Pada pengawetan tomat yang disemprot menggunakan cairan ecoenzym gula merah mengalami kemunduran mutu pada hari ke-7, tomat yang disemprot cairan ecoenzym gula pasir mengalami kemunduran mutu pada hari ke-5, dan tomat yang tidak disemprot cairan ecoenzym mengalami kemunduran mutu pada hari ke-4. Kemunduran mutu tomat ditandai dengan tekstur empuk, lembek dan berair, serta aroma masam dan menyengat pada tomat.Kata Kunci: Tomat, Ecoenzym, Limbah organik
MODELING DHF IN CENTRAL JAVA USING HYBRID NONPARAMETRIC SPLINE TRUNCATED-FOURIER SERIES APPROACH Utami, Tiani Wahyu; Maharani, Endang Tri Wahyuni; Fadlurohman, Alwan
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 18 No 3 (2024): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol18iss3pp1459-1470

Abstract

Regression analysis aims to determine the relationship and influence of predictor variables on response variables through regression curve. The problem with nonparametric regression research so far is that it only uses one approach, causing the estimation results to be biased, even though each data sub-pattern has its own suitability depending on the approach method used. Therefore, the hybrid method emerged as a development of nonparametric regression. Hybrid models are models that combine approach methods, with the hope of increasing accuracy in modeling analysis. This research was carried out using two non-parametric approaches, namely Spline Truncated and Fourier Series. Dengue Hemorrhagic Fever (DHF) is a disease caused by the dengue virus. DHF is endemic and occurs throughout the year, especially during the rainy season because mosquitoes reproduce optimally. The aim of this research is to estimate the Hybrid Nonparametric Spline Truncated -Fourier Series model and apply the estimation results to data on DHF cases in Central Java. The data used to apply the hybrid nonparametric Spline Truncated-Fourier series regression model is DHF in the city/districts of Central Java. Estimation smoothing parameters uses the GCV (Generalized Cross Validation) method. The best model is selected based on largest R-Square and the smallest MSE. Modeling the disease of DHF cases in Central Java using the Spline Truncated-Fourier Series hybrid estimator produced the best model from the Spline Truncated model with two knot points for each predictor and the Fourier Series model with value of 9. Based on the results obtained, it can be compared that the Truncated Spline-Fourier Series hybrid model is better than the Spline Truncated model, this can be seen from the largest R-square, namely 99.94% and the smallest MSE.
Implementation of STEM-Integrated PjBL Based on Lesson Study: Improving Students' Critical Thinking Skills Nurdiana, Lizza; Winaryati, Eny; Maharani, Endang Tri Wahyuni; Ikhsan, Zanaton H; Rauf, Rose Amnah Abd; Salaffudin, Affan
Journal of Educational Chemistry (JEC) Vol. 6 No. 2 (2024)
Publisher : Department of Chemistry Education, Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jec.2024.6.2.22640

Abstract

This study aims to examine the application of lesson study design on chemistry material in improving critical thinking skills of students in class XI-2 SMA Negeri 2 Semarang. The research was conducted for three meetings involving the implementation of Project-Based Learning (PjBL) learning model with STEM (Science, Technology, Engineering, Mathematics) approach. The lesson study stages included planning, implementation, and reflection focusing on reaction rate material, involving students in collaborative activities such as designing and testing simple tools. The results showed that the application of the STEM-based PjBL model significantly improved students' critical thinking skills. This improvement can be seen from students' ability to identify, analyse, and solve problems based on relevant theories. The learning activities implemented, such as group discussions and windows shopping activities, also play an important role in improving interaction and collaboration between students. The implementation of STEM in PjBL not only deepens students‘ understanding of chemical concepts, but also increases students’ interest and active participation in the learning process. This study concludes that the application of STEM-based PjBL learning model, collaborated with lesson study, is able to improve critical thinking skills and the quality of chemistry learning on reaction rate material.
Co-Authors Adhimah, Dewi Rokhmatul Alwan Fadlurohman Ana Hidayati Mukaromah Andari Puji Astuti Andari Puji Astuti, Andari Puji Arifiani Agustin Amalia Dwi Pamaya Eko Yuliyanto Eny Winaryati Falah Nabila Febriansyah, Moch. Rizky Fitria Fatichatul Hidayah Hikmah, Annisa Nurul Ikhsan, Zanaton H Iksan, Zanaton Haji Jatmiko Susilo Lutfiana Kartika Dewi Mahmudah, Ninda Aulia Maryam Ulfah Wael Meka Zainal Farabi Nisa Pramudya Nurdiana, Lizza Pramesti, Novia Eka Prasetyawan Aji Sugiharto Prasetyo, Muhammad Hadi Purnomo - Rauf, Rose Amnah Abd Riska Novia Sari Rita Dewi Lukitasari Rizki Permata Sari Sakti Imam Muchlissin Salaffudin, Affan Sari, Sintia Sazuana, Yumi Sri Darmawati Sri Darmawati Sri Sinto Dewi Stalis Norma Ethica Susanti, A.Meryam Sylmi Pramiana Tiani Wahyu Utami Triyono Triyono Wahyudi, Riky Yusrin - Yusrin, Yusrin