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All Journal Buletin Peternakan NUSRA: Jurnal Penelitian dan Ilmu Pendidikan
Maryati, Tutik
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Education Languange, Linguistic, Communication & Media Mathematics Veterinary Other

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Implementasi Model Pembelajaran Cooperative Learning Tipe Jigsaw dalam Meningkatkan Aktivitas dan Hasil Belajar Matematika Maryati, Tutik; Sujiono, Sujiono; Purnomo, Danang Try; Sudarto, Sudarto; Shadikah, Arina Afiyati; Harto, Sugik; Rispatiningsih, Dwi Maryani
NUSRA : Jurnal Penelitian dan Ilmu Pendidikan Vol. 5 No. 1 (2024): NUSRA: Jurnal Penelitian dan Ilmu Pendidikan, Februari 2024
Publisher : LPPM Institut Pendidikan Nusantara Global

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55681/nusra.v5i1.2134

Abstract

The aim of this research is to determine the increase in students' Mathematics learning activities and outcomes by implementing the Jigsaw type cooperative learning model in class XI IPA.1 of SMA Negeri 1 Ampel for the 2021/2022 academic year. The research was carried out in the even semester of the 2021/2022 academic year for 2 months, namely from April to May 2022. The data collection method in this research used the test method and observation method. Data collection tools include test items, observation guidelines, and test results sheets. The research results are presented as follows: (1) Implementation of the Jigsaw type cooperative learning model can increase the mathematics learning activities of class XI IPA.1 students at SMA Negeri 1 Ampel for the 2021/2022 academic year. The student activity score in cycle I was 6.86 (fair), cycle II was 7.43 (good) and cycle III was 8.29. (2) Implementation of the Jigsaw type cooperative learning model can improve the mathematics learning outcomes of class XI IPA.1 students at SMA Negeri 1 Ampel for the 2021/2022 academic year. The number of students who achieved the KKM score in cycle I to cycle III was 18 people or 95%. Apart from that, the average class score in cycle I was 73.46; in cycle II was 74.62; and in cycle III it was 77.31.
Influence of Retanning Agents on Physical Characteristics of Snow-White Glove Leather from Goat Skin Yuliatmo, Ragil; Maryati, Tutik; Rahmawati, Atiqa; Adamu, Dahiru J M; Mizan, Al
Buletin Peternakan Vol 48, No 2 (2024): BULETIN PETERNAKAN VOL. 48 (2) MAY 2024
Publisher : Faculty of Animal Science, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21059/buletinpeternak.v48i2.95274

Abstract

The quality of leather is subject to various elements, such as the specific raw material used, and the processing techniques implemented throughout the production process. Goatskin, renowned for its exceptional softness and durability, is frequently employed in the production of gloves owing to its desired attributes, notably its capacity to produce snow-white gloves. Retanning is an essential step in the leather manufacturing process as it significantly improves the characteristics of the leather. Through an investigation into the impacts of distinct retanning agents on goatskin leather gloves, this research endeavor seeks to offer significant knowledge regarding the most effective retanning procedures that can augment the tactile attributes of snow- white leather gloves. In this study, formaldehyde, alum, chromium, and chromium alum were employed as retanning agents. The retanned leathers were assessed by physical parameters, Principal Component Analysis (PCA), and Fourier Transform Infrared spectroscopy (FTIR), then compared to a commercially available snow-white leather glove. The physical characteristics of chrome alum retanned leather showed a high degree of softness (6.60±0.02 mm), good tear strength (1.530±117 N/cm), and tensile strength (1.500±100 N/cm 2 ). The principal component analysis (PCA) also supported that the properties of chrome alum retanned snow-white glove leather closely resemble commercial leather and the result from this study suggested that all factors notably impact the skin's physical quality, except for thickness. Additionally, the FTIR analysis reveals similar functional groups from the different retanned leathers indicated by comparable peaks and stretching patterns. Therefore, chrome-alum could be a well alternative retanning agent for the production of snow-white glove leather.
Co-Authors Adamu, Dahiru J M Danang Try Purnomo Harto, Sugik Mizan, Al Rahmawati, Atiqa Rispatiningsih, Dwi Maryani Shadikah, Arina Afiyati Sudarto Sudarto Sujiono Sujiono, Sujiono Yuliatmo, Ragil