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All Journal Jurnal Pendidikan IPA Indonesia Tropical Animal Science Journal
I. Wahyudi, I.
Program Studi Pendidikan Fisika FKIP Universitas Lampung, Indonesia
Agriculture, Biological Sciences & Forestry Education Energy

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INCREASING TEACHERS INQUIRY ABILITY WITH TRAINING INQUIRY ABILITY PROGRAMME AND TEACHING SCIENCE Ertikanto, C.; Wahyudi, I.; Viyanti, V.
Jurnal Pendidikan IPA Indonesia Vol 4, No 2 (2015): October 2015
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v4i2.4183

Abstract

This research aims to produce training program inquiry ability and in teaching science through inquiry approach (is called Program). This study used the methods of research and development. Program design began with a training needs analysis, conducted through field studies and literature, then validated and tested on a limited basis for program design. The implemented programs that have been revised in the main try out in KKGSD Bandar Lampung, by using quasi- experimental design, pretest-posttest control group design. Subjects in this study is the number of elementary school teachers in the city of Bandar Lampung, which involved teachers from primary schools located in the centre of the town, suburb, and remote area in Bandar Lampung. The instrument used was the initial test and final test, questionnaire, assessment of product format, and the observation sheet. The results showed: (1) The inquiry ability of the teacher with PPKIMS through inquiry approach it was higher than with conventional PPKIMS; (2) The inquiry ability of the teacher to teaching with PPKIMS through inquiry approach and conventional PPKIMS after training program was different, and significant improvement towards teachers inquiry ability of PPKIMS through inquiry approach, and it was higher than the conventional PPKIMS.
INCREASING TEACHERS INQUIRY ABILITY WITH TRAINING INQUIRY ABILITY PROGRAMME AND TEACHING SCIENCE Ertikanto, C.; Wahyudi, I.; Viyanti, V.
Jurnal Pendidikan IPA Indonesia Vol 4, No 2 (2015): October 2015
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v4i2.4183

Abstract

This research aims to produce training program inquiry ability and in teaching science through inquiry approach (is called Program). This study used the methods of research and development. Program design began with a training needs analysis, conducted through field studies and literature, then validated and tested on a limited basis for program design. The implemented programs that have been revised in the main try out in KKGSD Bandar Lampung, by using quasi- experimental design, pretest-posttest control group design. Subjects in this study is the number of elementary school teachers in the city of Bandar Lampung, which involved teachers from primary schools located in the centre of the town, suburb, and remote area in Bandar Lampung. The instrument used was the initial test and final test, questionnaire, assessment of product format, and the observation sheet. The results showed: (1) The inquiry ability of the teacher with PPKIMS through inquiry approach it was higher than with conventional PPKIMS; (2) The inquiry ability of the teacher to teaching with PPKIMS through inquiry approach and conventional PPKIMS after training program was different, and significant improvement towards teachers inquiry ability of PPKIMS through inquiry approach, and it was higher than the conventional PPKIMS.
Enhancing the Accuracy of NIRS Prediction with Adaptive Machine Learning for Assessing Fermented Citronella Feed Quality Samadi, S.; Kaloudis, E.; Wahyudi, I.; Wajizah, S.; Munawar, A. A.
Tropical Animal Science Journal Vol. 48 No. 5 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.5.440

Abstract

The valorization of agricultural residues as alternative feed resources is increasingly critical for enhancing livestock sustainability. This study investigates the potential of sequential fermentation to improve the nutritional quality of citronella (Cymbopogon nardus L.) residues and evaluates the use of near-infrared spectroscopy (NIRS) combined with machine learning (ML) models for rapid feed quality assessment. Citronella residues were subjected to sequential fungal and lactic acid bacterial fermentation, and their feed quality attributes, including moisture, crude protein, crude fiber, ether extract, and ash content, were measured using standard laboratory methods. NIR spectra were acquired from 1000 to 2500 nm and analyzed using partial least squares regression (PLSR), ridge regression, adaptive boosting (AdaBoost), and support vector machine regression (SVMR). Principal component analysis (PCA) revealed a high degree of spectral homogeneity with sufficient underlying variability to enable robust modeling. Among the models evaluated, AdaBoost and SVMR consistently outperformed linear models, achieving high coefficients of determination (R² ≥ 0.99) and low root mean square errors (RMSE). Particularly, SVMR and AdaBoost achieved high predictive accuracy for moisture, crude protein, and ether extract content, with residual predictive deviation (RPD) values far exceeding standard thresholds. The integration of sequential fermentation, NIRS, and advanced ML algorithms presents a rapid, non-destructive, and sustainable approach to upgrading and monitoring alternative fibrous feed sources, supporting broader initiatives in circular bioeconomy and sustainable animal production.
Co-Authors C. Ertikanto, C. Kaloudis, E. Munawar, A. A. Samadi, S. V. Viyanti, V. Wajizah, S.