Eni Wulandari
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Penggunaan Model Pembelajaran Kooperatif Tipe NHT untuk Meningkatkan Aktivitas dan Hasil Belajar Matematika Eni Wulandari; Gimin Suyadi; Nur Hanurawati
JURNAL PENDIDIKAN MATEMATIKA UNIVERSITAS LAMPUNG Vol 1, No 4 (2013): Jurnal Pendidikan Matematika Universitas Lampung
Publisher : Universitas Lampung

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Learning  done by the teacher is impacted on students’ learning success. Based on the experienced of learning in VIIIA class of SMP Negeri 1 Natar, the teacher is one of the sole source of information and learning dominate, resulting in low activity and the success of students’ studying mathematics. Action research is done to improve the activity and success of students’ mathematics learning through cooperative learning model type NHT. The measures are implemented in three cycles, each cycle consist of four meetings. The instruments used to collect the data in this study are in the form of students’ sheets activity, field notes, and tests. The tests are conducted each end of the cycle to determine the success of students’ mathematics studying. The analysis showed that the percentage of the activities and mathematics learning outcomes of each cycle are increased from cycle to cycle up to the third cycle. The conclusion of this study is the use of cooperative learning model NHT type can increase the activities and the success of mathematic learning the students of VIIIA SMP Negeri 1 Natar South Lampung.Keywords: Cooperative learning NHT type, activity, learning outcomes.
Performance Evaluation Zeta Converter Using PI Controller for Energy Management in DC Nanogrid Isolated System Farid Dwi Murdianto; Indhana Sudiharto; Eni Wulandari
INTEK: Jurnal Penelitian Vol 8, No 1 (2021): April 2021
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v8i1.2651


Renewable energy is needed as an alternative energy source. One of the implementations of renewable energy is the Solar Power Plant (PLTS). PLTS is a component that uses solar cells to convert solar energy into electrical energy. Unfortunately, the output power of this solar cell depends on the intensity of the light which causes the output power to enter the load to be unstable. Sometimes the PV power decrease because of the shading effect. From this problem a converter is needed to keep the system output voltage. The converter used in this research is the zeta converter. This Zeta converter can operate like a buck boost converter. The output of the system used is not stable. So that to stabilize it requires good control. In this paper using PI controller to control this system in order to keep the output system stable. 3. The error generated using the PI Control on the system is only 0.34%.