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All Journal Pendidikan Bahasa dan Sastra Indonesia Jurnal Ilmiah Poli Rekayasa Jurnal Fisika Unand
Safitri, Ramadani
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Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics

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KETERAMPILAN MENULIS TEKS CERPEN MENGGUNAKAN TEKNIK COPY THE MASTER DAN TEKNIK MIND MAPPING SISWA KELAS XI SMA NEGERI 2 PADANG PANJANG Safitri, Ramadani; Zulfikarni, Zulfikarni
Jurnal Pendidikan Bahasa dan Sastra Indonesia Vol 8 No 3 (2019)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.845 KB) | DOI: 10.24036/108219-019883

Abstract

ABSTRACT This study aims to describe students short story writing skills using the master copy technique and mind mapping techniques. This type of research is quantitative with analytical descriptive method. Research sampling is done by purposive sampling technique. The instrument used to collect data in this study is the performance test, which is writing short story texts. The research data ini the form of short story writing skills using the master copy technique and mind mapping technique. The research data collection technique is by analyzing students short story writing skills by apllying the master copy technique and mind mapping technique. Indicators used to assess short story writing skills, namely structure, instrinsic elements, and linguistic elements. Based on the result of the study, it can be concluded that. First, short story writing skills using the master copy the technique of the eleventh grade students of Padang Panjang public high school 2 are in good qualification because the average value of short story text writing skills using the master copy technique is 82.07. Second, short story writing skills using mind mapping techniques of the eleventh grade students of Padang Panjang 2 high school are in excellent qualifications because the average value of short story writing skills using mind mapping technique is 88.26. Third, based on the calculated average values for the two texts, there is a significant different between the short story writing skills using the master copy technique of the eleventh grade students of Padang Panjang 2 high school.Kata kunci : keterampilan menulis, teks cerpen, copy the master, mind mapping
Analisis Dampak Perubahan Tutupan Lahan di Kalimantan Terhadap Temperatur Permukaan Safitri, Ramadani; Vonnisa, Mutya; Marzuki, Marzuki
Jurnal Fisika Unand Vol 11 No 2 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.11.2.173-179.2022

Abstract

Penelitian ini membahas tentang perubahan tutupan lahan di Kalimantan terhadap temperatur permukaan. Identifikasi perubahan tutupan lahan dilakukan dengan metode analisa data satelit landsat pada setiap kelas tutupan lahan  yang bertujun untuk melihat kenaikan suhu permukaan. Klasifikasi tutupan lahan dan suhu permukaan didapatkan dari data landsat 5 dan 8 yang diolah dengan menggunakan ENVI 5.3 dan Arcgis 10.6 1. Klasifikasi tutupan lahan dibagi atas 3 kelas secara garis besar yaitu lahan terbangun, badan air, dan lahan non terbangun. Penelitian ini menemukan bahwa suhu permukaan pada setiap kelas tutupan lahan berbeda-beda. Perubahan pada tahun 1999 ke 2014 sebesar 7 % pada wilayah Kalimatan Timur, Kalimantan Selatan dan Kalimantan Barat. Hasil yang didapatkan menunjukkan perubahan tutupan lahan berbanding lurus dengan temperatur permukaan
PENINGKATAN KINERJA MESIN PRESS BAGLOG JAMUR TIRAM MELALUI MODIFIKASI SISTEM KONTROL TEKANAN SILINDER MENGGUNAKAN MAGNET CLUTCH -, Junaidi; Rahman, Riki; Anderson, Sir; Priyanda, Eko; Safitri, Ramadani
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.422

Abstract

Manual and semi-mechanical baglog production for oyster mushrooms in Indonesia, particularly in Padang West Sumatra, has suffered from low capacity, inconsistent quality, and operator fatigue. In this study evaluated performance improvements of a baglog pressing machine through modification of magnetic clutch integration and cylinder pressure control mechanism. The modification included installing a magnet clutch with supporting components (bushing, plate disk, clutch housing), motor and gearbox shafts, redesign of the pressing plate, and dual-opening chamber. Several technique was employed such as reducer speeds (30 to 90 rpm) and threaded rod adjustments distance (1.5 to 6.5 cm). Production capacity, cycle time, efficiency, and baglog density were investigated. Based on results, the  production capacity increased from approximately ±20 baglogs/hour (manually)to 120–270 baglogs/hour after modification, while the pressing cycle time decreased to as low as 13.33 s/baglog. The baglog density increased from about ±0.65 g/cm³ to ~0.709–0.900 g/cm³, with 80–90% process efficiency. Therefore, the magnetic clutch enabled precise engagement/disengagement control, enhancing safety and cycle precision. Overall, the modified machine provided an efficient for improving productivity, quality, and ergonomics for for SME’s sector mushroom production.
PERANCANGAN ALAT PEMECAH KULIT KEMIRI TIPE DOUBLE ROLL DENGAN BAHAN ST37 KAPASITAS 82 KG/JAM Anderson, Sir; Zulhendri, Zulhendri; Nasirwan, Nasirwan; Safitri, Ramadani; Salam, Pandu Abdi
Jurnal Ilmiah Poli Rekayasa Vol 21, No 1 (2025): Oktober
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.1.429

Abstract

Candlenut (Aleurites moluccana L. Wild) is an economically valuable plantation commodity in Indonesia; however, post-harvest handling is largely conducted using conventional shelling methods, which are inefficient and often cause seed damage, reducing quality and market value. Previous studies have investigated operational parameters of double roll shellers, such as rotational speed, roll spacing, and hopper width, yet most focused on one or two parameters in isolation, without comprehensively assessing the relationship between production capacity, shelling effectiveness, and kernel quality, nor comparing machine performance with traditional methods used by farmers. This research addresses that gap by designing and evaluating a double roll candlenut sheller made of ST37 steel with a target capacity of 82 kg/hour, considering production capacity, shelling efficiency, and kernel quality simultaneously. The design process included literature review, physical and mechanical characterization of candlenuts, structural and transmission system design, and calculations for power requirements and component safety. Results indicated that the maximum force required to shell two candlenuts simultaneously is 3,418.46 N, with a total machine power of 4,012.80 W (≈5.38 hp); applying a service factor of 1.2, a 6.5 hp gasoline engine was selected. Shafts, pulleys, V-belts, and gears were designed to ensure torque, shear stress, and deflection remain within safe limits. The machine operates at a roll speed of 150 rpm, achieves the targeted production capacity, and reduces kernel damage, thereby increasing the value of candlenuts for farmers. This integrated design approach provides a practical and efficient alternative to conventional shelling methods.
Co-Authors Junaidi Junaidi Marzuki Marzuki Mutya Vonnisa Nasirwan Nasirwan Priyanda, Eko Riki Rahman Salam, Pandu Abdi Sir Anderson Zulfikarni Zulfikarni Zulhendri Zulhendri