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All Journal agriTECH Jurnal Teknologi Agro-Industri Journal of Artificial Intelligence and Digital Business Journal of Digital Community Services
Maria Magdalena Sinaga
Politeknik Negeri Pontianak
Religion Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Social Sciences Other

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Application of Liquid Smoke from Rubber Wood Clone PB-340 as Latex Coagulant and Preservation of Natural Rubber Coagulum Maria Magdalena Sinaga; Djagal Wiseso Marseno; Manikharda Manikharda
agriTECH Vol 43, No 1 (2023)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.70487

Abstract

The utilization of rubber wood waste in the form of liquid smoke has the potential to overcome environmental problems caused by the industry. Therefore, this study aimed to determine the potential of liquid smoke from rubberwood clone PB 340 to be used as a coagulant and preservative. Rubber wood waste was processed into liquid smoke using the pyrolysis method with a temperature of 400°C. Determination of the composition of liquid smoke was carried out using gas chromatography-mass spectrometry (GC-MS) analysis. The results showed that the rubber wood clone PB 340 contained 57.78% cellulose, 12.16% hemicellulose, and 19.01% lignin. Furthermore, volatile analysis with GC-MS showed that liquid smoke from rubber wood clone PB 340 contained 58 organic compounds. Some compounds in liquid smoke were phenols, furans, furfurals, acetic acid, and cyclopentene. The product was then tested for its performance as a latex coagulant at several concentrations of 5%, 10%, 15%, 20%, and 25% v/v, as well as storage time of 1, 7, and 14 days. The treated latex samples that had turned into coagulums were examined for their sheet quality parameters, including initial plasticity (P0), plasticity retention index (PRI), total volatile compounds, impurity, and ash content. The outcomes from all comparisons of pure liquid smoke concentrations and storage time of up to 14 days of the coagulum samples showed that in the initial plasticity value (P0), the plasticity retention index (PRI), volatile matter, ash content, and dirt content had met the applied Standard Indonesian Rubber (SIR).
Pengaruh Green Marketing dan Brand Image terhadap Keputusan Pembelian Produk Susu Cair Kemasan Annisa, Warastra Nur; Brilian, Chintia Agrefina; Sinaga, Maria Magdalena; Kasih, Avicenna Nur; Pratama, Rahmat Tata
RIGGS: Journal of Artificial Intelligence and Digital Business Vol. 5 No. 1 (2026): Februari - April
Publisher : Prodi Bisnis Digital Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/riggs.v5i1.5508

Abstract

Susu memiliki karakteristik mudah rusak dan tidak tahan lama sehingga perlakuan pascapanen penting untuk diperhatikan sehingga susu sapi mulai diolah agar tahan lama ketika disimpan seperti susu pasteurisasi dan susu UHT (Ultra High Temperature). Kesadaran masyarakat dalam memenuhi kebutuhan gizi juga telah mengalami peningkatan dilihat dari masyarakat mulai mengkonsumsi susu sapi. Hal ini mempengaruhi semakin banyak industri pengolahan susu yang memproduksi susu cair kemasan sehingga menyebabkan adanya persaingan antar industri. Oleh karena itu, penelitian ini bertujuan untuk menganalisis pengaruh green marketing (green product, green price, dan green promotion) dan brand image terhadap keputusan pembelian produk susu cair kemasan. Pengumpulan data pada penelitian ini dilakukan dengan kuesioner menggunakan teknik purposive sampling. Total sampel yang digunakan yaitu 126 orang. Metode yang digunakan untuk melakukan analisis data yaitu metode regresi linear berganda dengan green marketing (green product, green price, dan green promotion) dan brand image sebagai variabel bebas sedangkan keputusan pembelian sebagai variabel terikat. Hasil penelitian menunjukkan bahwa secara simultan green product, green price, green promotion, dan brand image secara bersama-sama berpengaruh positif signifikan terhadap keputusan pembelian produk susu cair kemasan. Sementara pengujian secara parsial dari empat variabel yang digunakan, hanya terdapat satu variabel yang berpengaruh positif terhadap keputusan pembelian yaitu green promotion. 
Analysis of Robusta Coffee Production Forecasting and Financial Feasibility of Home Industry Spice Coffee Businesses in Sukarame District, Bandar Lampung City Chintia Agrefina Brilian; Warastra Nur Annisa; Ahmad Fitri; Maria Magdalena Sinaga
Jurnal Teknologi Agro-Industri Vol. 12 No. 2 (2025): Jurnal Teknologi Agro-Industri
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat, Politeknik Negeri Tanah Laut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/jtai.v12i2.243

Abstract

Forecasting analysis was used to predict the availability of Robusta coffee in Lampung as a basis for developing innovative coffee-based products, such as spiced coffee. Furthermore, financial analysis was conducted to assess the feasibility of processing spiced coffee as a regional flagship product. This research was conducted through a literature study from various sources, and data analysis was performed using POM-QM for Windows Version 3 software. The results of the study show that Robusta coffee production in Lampung tends to be stable from 2022 to 2026. In 2026, Robusta coffee production in Lampung will reach 116,272 tons. Financial analysis shows feasibility with an NPV of IDR 167,473,835.26, IRR of 222%, Net B/C of 2.76, Gross B/C of 1.26, and a PBP of 1 year. The investment can be recouped in 2 years, making the spice coffee home industry a viable venture to develop.
Analysis of Robusta Coffee Production Forecasting and Financial Feasibility of Home Industry Spice Coffee Businesses in Sukarame District, Bandar Lampung City Chintia Agrefina Brilian; Warastra Nur Annisa; Ahmad Fitri; Maria Magdalena Sinaga
Jurnal Teknologi Agro-Industri Vol. 12 No. 2 (2025): Jurnal Teknologi Agro-Industri
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat, Politeknik Negeri Tanah Laut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/jtai.v12i2.243

Abstract

Forecasting analysis was used to predict the availability of Robusta coffee in Lampung as a basis for developing innovative coffee-based products, such as spiced coffee. Furthermore, financial analysis was conducted to assess the feasibility of processing spiced coffee as a regional flagship product. This research was conducted through a literature study from various sources, and data analysis was performed using POM-QM for Windows Version 3 software. The results of the study show that Robusta coffee production in Lampung tends to be stable from 2022 to 2026. In 2026, Robusta coffee production in Lampung will reach 116,272 tons. Financial analysis shows feasibility with an NPV of IDR 167,473,835.26, IRR of 222%, Net B/C of 2.76, Gross B/C of 1.26, and a PBP of 1 year. The investment can be recouped in 2 years, making the spice coffee home industry a viable venture to develop.
Sosialisasi Sistem Pendukung Keputusan ROC-SAW Berbasis Web sebagai Instrumen Navigasi Karir dan Pemilihan Jurusan Kuliah bagi Siswa SMK SMTI Pontianak Borneo Satria Pratama; Setyo Widayanti; Donor Utomo Muhammad Susilo; Libertus Darus; Agato Agato; Chintia Agrefina Brilian; Maria Magdalena Sinaga; Lidia Chronika Simanjuntak; Aulia Hana Pertiwi; Khairunnisa Arika Lestianti
Journal of Digital Community Services Vol. 3 No. 2 (2026): July-Desember
Publisher : Institute Of Advanced Knowledge and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69693/dcs.v3i2.82

Abstract

Pemilihan jurusan kuliah dan perencanaan karir merupakan proses penting yang memerlukan pemahaman diri serta informasi yang memadai. Namun, banyak siswa masih mengalami kesulitan dalam menentukan pilihan yang sesuai dengan minat, bakat, dan tujuan karir mereka. Kegiatan Pengabdian kepada Masyarakat (PKM) ini bertujuan mengenalkan dan mengimplementasikan Sistem Pendukung Keputusan (SPK) berbasis web sebagai instrumen navigasi karir dan pemilihan jurusan kuliah bagi siswa SMK SMTI Pontianak. Sistem yang dikembangkan, yaitu COMPASS (Career Orientation and Major Preference Assistance Support System), menggunakan kombinasi metode Rank Order Centroid (ROC) untuk pembobotan kriteria dan Simple Additive Weighting (SAW) untuk perangkingan alternatif. Sebelum diterapkan, aplikasi diuji menggunakan metode Black-Box Testing dan menunjukkan bahwa seluruh fungsi sistem berjalan sesuai dengan kebutuhan. Kegiatan melibatkan 171 siswa kelas XI melalui penyampaian materi, sharing pengalaman mahasiswa, demonstrasi aplikasi, dan praktik penggunaan sistem. Evaluasi dilakukan menggunakan kuesioner pre-test dan post-test yang terdiri atas lima pertanyaan dengan pilihan jawaban “Ya” dan “Tidak”. Hasil evaluasi menunjukkan peningkatan pemahaman siswa pada seluruh indikator yang diukur, meliputi pentingnya perencanaan karir, pemanfaatan teknologi dalam pengambilan keputusan, pengenalan Sistem Pendukung Keputusan, kemampuan menentukan pilihan pendidikan dan karir secara lebih terarah, serta pengetahuan mengenai Program Studi D-IV Pengolahan Hasil Perkebunan Terpadu pada Jurusan Teknologi Pertanian secara khusus dan Politeknik Negeri Pontianak secara umum. Hasil tersebut menunjukkan bahwa sosialisasi dan penggunaan aplikasi COMPASS dapat mendukung perencanaan pemilihan jurusan pada pendidikan lanjut (kuliah) dan karir siswa.
Co-Authors . Agato Ahmad Fitri Aulia Hana Pertiwi Borneo Satria Pratama Chintia Agrefina Brilian Djagal Wiseso Marseno Donor Utomo Muhammad Susilo Kasih, Avicenna Nur Khairunnisa Arika Lestianti Libertus Darus Lidia Chronika Simanjuntak Manikharda Manikharda Pratama, Rahmat Tata Setyo Widayanti Warastra Nur Annisa