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SINTESIS DAN ANALISIS SIFAT FISIK DAN MEKANIK PAPAN KOMPOSIT DARI LIMBAH PELEPAH SAWIT DAN SABUT KELAPA Erwan, Erwan; Faryuni, Irfana Diah; Wahyuni, Dwiria
PRISMA FISIKA Vol. 3 No. 3 (2015)
Publisher : FMIPA, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (339.589 KB) | DOI: 10.26418/pf.v3i3.13893

Abstract

Telah dilakukan sintesis papan komposit dari pelepah sawit dan sabut kelapa menggunakan perekat urea formaldehide (UF), parafin dan katalis. Penelitian ini bertujuan untuk menganalisis sifat fisik dan mekanik pada papan komposit homogen dan berlapis. Variasi komposisi pelepah sawit : sabut kelapa adalah (100:0, 90:10, 80:20, 70:30, 60:40, 50:50, 40:60, 30:70, 20:80, 10:90, 0:100)% dengan nama sampel berturut-turut adalah A, B, C, D, E, F, G, H, I, J dan K. Penelitian diawali dengan pencampuran bahan dengan perekat, kemudian bahan dikempa dengan tekanan 30 kg/cm2 pada suhu 150 °C selama 8 menit. Hasil uji sifat fisis dan mekanis papan komposit mengacu pada standar JIS A 5908-2003. Semua sampel memenuhi standar untuk kerapatan dan kadar air masing-masing dengan rentang nilai 650,2 - 765,3 kg/m3, dan 5,6 - 11,3 %. Empat sampel yang memenuhi standar untuk internal bonding yaitu sampel A, B, C, dan D dengan nilai pada rentang 14,8 x 104 N/m2 - 32,9 x 104 N/m2. Sedangkan untuk uji kuat pegang sekrup dan keteguhan patah, semua sampel memenuhi standar masing-masing rentang nilai 332,2 - 896,7 N, dan 1,03 x 107 - 2,02 x 107 N/m2. Hasil uji pengembangan tebal dan keteguhan elastisitas semua sampel tidak memenuhi standar yang telah ditetapkan. Kata kunci : pelepah sawit, sabut kelapa, urea formaldehyde, dan papan komposit.
HUBUNGAN KERAPATAN VEGETASI DAN STOK KARBON BAGIAN ATAS PERMUKAAN TANAH PADA HUTAN MANGROVE DI DESA SUNGAI KUPAH Erwan, Erwan; Anshari, Gusti Zakaria; Hardiansyah, Gusti
Tengkawang : Jurnal Ilmu Kehutanan Vol 15, No 2 (2025): TENGKAWANG : JURNAL ILMU KEHUTANAN
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jt.v15i2.76990

Abstract

The carbon storage in mangrove forest plays a crucial role in climate change mitigation. Sungai kupah village is an ecotourism village engaged in mangrove forest tourism restoration. Therefore, the government"™s program to preserve mangrove forst aligns with the conservation efforts undertaken by tourism enthusiasts. Hence, a study is needed on carbon stock reserves at several locations in the Sungai kupah mangrove forest. This research utilized non-destructive sampling method and applied available allometric equations. Data collection involved measuring the diameter of breast height of trees within 10 x 10 meter sample plots with a 5 meter plot interval. The research results indicated an average carbon stock production in above ground biomass of 167.05 tons/ha along the entire path. The highest carbon content was found in path three at 96.46 tons/ha, followed by path two at 72.29 tons/ha, and the smallest in path one at 12.94 tons/ha. Based on the growth rate, the highest stored carbon value for trees is found on line 3, with a value of 83.21 tons/ha, while for seedlings on line 3, it is 13.25 tons/ha. The dominant vegetation species in each zone are Sonneratia caseolaris in line I, and Avicennia lanata in both line II and line III. Therefore, the vegetation density in each zone is related to the biomass value obtained and the carbon stock. Keywords: allometric, biomass, carbon, mangroves, mitigation. Abstrak Penyimpan karbon pada hutan mangrove mempengaruhi kinerja mitigasi perubahan iklim. Desa Sungai Kupah merupakan Desa Ekowisata yang bergerak dalam restorasi wisata hutan mangrove. Sehingga program pemerintah dalam melestarikan hutan mangrove bergerak selaras dengan pelestarian yang dilakukan oleh penggiat wisata. Oleh sebab itu perlunya studi penelitian cadangan stok karbon pada sejumlah lokasi di hutan mangrove Sungai Kupah. Penelitian ini menggunakan metode non destruktif sampling dan menerapkan persamaan allometrik yang telah tersedia. Pengumpulan data dilakukan dengan mengukur diameter pohon setengah dada di dalam plot pengambilan sampel berukuran 10 x 10 meter dan jangkauan antara plot sebesar 5 meter. Hasil penelitian menunjukkan rerata produksi stok karbon pada biomassa atas permukaan keseluruhan jalur diperoleh sebesar 167,05 ton/ha. Kandungan karbon tertinggi terdapat pada jalur 3 sebesar 96,46 ton/ha, kemudian jalur 2 sebesar 72,29 ton/ha dan yang terkecil berada pada jalur 1 sebesar 12,94 ton/ha. Berdasarkan tingkat pertumbuhan, untuk pohon nilai karbon tersimpan tertinggi berada pada jalur 3 dengan masing-masing nilai sebesar 83,21 ton/ha dan untuk pancang pada jalur 3 sebesar 13,25 ton/ha. Jenis vegetasi yang mendominasi setiap zonasi yaitu pada jalur I didominasi oleh jenis Sonneratia caseolaris dan jalur II dan Jalur III didominasi oleh jenis Avicennia lanata. Sehingga besar nilai kerapatan pada tiap vegetasi memiliki hubungan dengan nilai biomassa yang diperoleh maupun stok karbon. Kata kunci: allometrik, biomassa, karbon, mangrove, mitigasi
Implementation of Simple and Weighted Moving Average for Forecasting Tela-Tela Production in MSME X Sariati, Sariati; Pratama, Borneo Satria; Albar, Ferdy; Sitio, Dea Yolanda Putri; Riandry, Dimas Dwika; Antonio, Marcho; Januarti, Sri; Aliansyah, Bayu Rimba; Sutignya, Th. Candra Wasis Agung; Solfianti, Maidia; Erwan, Erwan; Sembiring, Loko Jeremia
RIGGS: Journal of Artificial Intelligence and Digital Business Vol. 4 No. 4 (2026): November - January
Publisher : Prodi Bisnis Digital Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/riggs.v4i4.5205

Abstract

Accurate production forecasting is essential for micro, small, and medium enterprises (MSMEs) to support effective production planning, inventory control, and decision-making. This study evaluates the performance of the Simple Moving Average (SMA) and Weighted Moving Average (WMA) methods in forecasting tela-tela production demand at MSME X using different historical period lengths. Production data from November 2023 to October 2024 were analyzed, and forecasting accuracy was assessed using the Mean Absolute Percentage Error (MAPE). The results indicate that forecasting accuracy varies depending on both the length of the moving average period and the weighting scheme applied. The WMA model with a 4-period window (n = 4) achieved the highest accuracy, producing the lowest MAPE value of 8.36%, which is classified as highly accurate. The SMA model with n = 4 also demonstrated good performance, with a MAPE value of 14.40%. Meanwhile, models employing longer historical periods (n = 8) yielded MAPE values of 16.20% for WMA and 19.82% for SMA, both falling within the good forecasting performance category but exhibiting lower responsiveness to recent demand changes. These findings highlight that shorter historical periods, when combined with appropriate weighting, can more effectively capture recent demand patterns in dynamic production environments. Accordingly, the WMA method with a 4-period window is recommended for MSME X as a reliable and accurate approach to support production planning, optimize resource allocation, and reduce the risk of overproduction or stock shortages.  
PENERAPAN SUBSTITUSI PESTISIDA SINTETIS-BIOPESTISIDA PADA BUDIDAYA SAYURAN DI KELOMPOK TANI MAKMUR JAYA, KECAMATAN RASAU JAYA Danie Indra Yama; Zaenal Mutaqin; Muliani; Rista Delyani; Tika Rahma Yunita; Muhammad Ali; Ragil Putri Widyastuti; Okto Ivansyah; Donor Utomo Muhammad Susilo; Agato; Muhammad Rizal; Dwi Isyana Achmad; Kirana Fadhilah; Erwan; Loko Jeremia Sembiring; Maida Solfianti; Ahul Saputra; Kasianus Tomi; Aryan Rahmad Abdillah Abdillah
Jurnal Pengabdian Masyarakat Multidisiplin Vol 9 No 1 (2025): Oktober
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/jpm.v9i1.6572

Abstract

Makmur Jaya Farmers Group is a partner of this PKM program.Teh group still relies on synthetic pesticides and traditional pest control methods due to limited trust in biopesticides. They also lack understanding of vegetable cultivation techniques based on the substitution of synthetis pesticides with biopesticides usingthe 6T principles, have limited skills in proper pesticide application, and require adequate spraying equipment. This PKM activity aims to shift the farmers mindset toward biopesticides, provide knowledge on vegetable cultivation through synthetic to biopesticide substitution appling the 6T principles, enhance their pesticide application skills and provide spraying equipment as assistance. The program began with a needs assessment, followed by socialization, training sessions, hand on practice in environmentally friendly pest and disease control, and the handover of donated sprayers. As aresult, the famers knoeledge and skills in eco-friendly OPT management significantly improved. Participans showed great enthusiasm and expressed commitment to transition from chemical pesticides to biopesticides.
Co-Authors . Agato Ahul Saputra Albar, Ferdy Aliansyah, Bayu Rimba Anshari, Gusti Zakaria Antonio, Marcho Aryan Rahmad Abdillah Abdillah Danie Indra Yama Delyani, Rista Donor Utomo Muhammad Susilo Dwi Isyana Achmad Dwiria Wahyuni Gusti Hardiansyah Irfana Diah Faryuni Januarti, Sri Kasianus Tomi Kirana Fadhilah Maida Solfianti Muhammad Ali Muhammad Rizal Muliani Okto Ivansyah Pratama, Borneo Satria Ragil Putri Widyastuti Riandry, Dimas Dwika Sariati Sariati, Sariati Sembiring, Loko Jeremia Sitio, Dea Yolanda Putri Solfianti, Maidia Th. Candra Wasis Agung Sutignya Tika Rahma Yunita Zaenal Mutaqin