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Reducing Ammonia (NH3) Levels in Fish Cage Water Using Activated Carbon Adsorbent Derived from Purple Corn Cob Hamid, Muhammadin; Nasution, Tulus Ikhsan; Elfinita, Revi; Wijoyo, Hadi; Isnaeni, Isnaeni
Science and Technology Indonesia Vol. 9 No. 3 (2024): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.3.669-681

Successfully made adsorbent of activated carbon made from purple corn cob which aims to minimize ammonia (NH3) levels found in water in fish farming with cage ponds. Activated carbon using carbonization method with a change in temperature that is between 550°C, 600°C, and 650°C and activation using Na2CO3 solution as activator. Activated carbon that has been obtained has exceeded the standard of SNI No.06-3730-1995, with characteristics including carbon yield ranging from 79.71% to 89.85%, moisture content ranging from 11.3% to 25.4%, volatile matter content ranging from 10.10% to 24.5%, ash content ranging from 9.7% to 9.9%, and fixed carbon content ranging from 65.7% to 79.7%. Then test results were obtained such as CO2 functional groups were found to enhance the adsorption process. Activated carbon displays the presence of a predominantly amorphous structure but also revealed a crystalline carbon structure. The highest peak was obtained at 29.7° with Miller index (201). The activated carbon displays the presence of pores on the scattered surface with carbon elements dominating. Adsorption mechanism to reduce ammonia (NH3) using activated carbon due to intermolecular interaction process. So that when testing the application for ammonia absorption, the best results were obtained in the sample with an adsorbent mass of 1.50 g at a carbonization temperature of 650°C with an adsorption capacity value of 546.34 mg/g and ammonia reduction of 82%. This research can open up opportunities for the potential development of new materials, especially for fish farming through cage techniques.

Analysis of Land Suitability for Arabica Coffee in Toba Regency, North Sumatra, Indonesia Nora, Silvia; Kuswardani, Retna Astuti; Mawardi, Surip; Wijoyo, Hadi; Gandaseca, Seca; Novita, Aisar
International Journal of Biosciences and Biotechnology Vol 11 No 1 (2023): International Journal of Biosciences and Biotechnology
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/IJBB.2023.v11.i01.p07

Coffee is a mainstay plantation commodity in Toba Regency which is managed independently by the community where the land around the Lake Toba area is one of the potential lands in Toba Regency for developing Arabica coffee commodities because geographically Toba Regency is located at an altitude of 900 meters to 2,200 meters above sea level and directly borders Lake Toba. The strong roots of coffee plants make this plant one of the mainstays in preserving forests, restoring critical land, preventing erosion and flooding during the rainy season. The aim of this research is to analyze the land suitability of Arabica coffee plantations in Toba Regency. The method used to analyses the land suitability by using the matching method which was carried out by matching land characteristics with parameters/ criteria for plants based on Land Map Unit (LMU). The research results show that the area of Toba Regency based on the Geographic Information System (GIS) is 207,518.31 ha. Very suitable (S1) land suitability for Arabica Coffee Plants covering an area of 67,844.68 ha (32.69%), an area of 132,030.09 ha (63.62%) has S2 suitability class and an area of 7,643.54 ha (3.68%) has marginal suitability (S3). The potential land suitability class for coffee plants in Toba Regency becomes very suitable (S1) covering an area of 67,844.68 ha or 32.69%, moderate suitable class (S2) with temperature limitation covering an area of 132,030.09 ha (63.62%) and marginal suitability (S3 with temperature limitation) covering an area of 7,643.54 ha or 3.68%. Nutrient deficiencies were corrected by adding phosphorus (P) fertilizer of 4.19 kg P/ha or 9.31 kg SP36/ha or 11.63 kg TSP/ha. Nitrogen (N) fertilizer is 75 kg N/ha or the equivalent of 166,625 Kg Urea/ha. Potassium (K) fertilizer as much as 3 kg KCl/ha. Compost fertilizer is 10.56 tons of compost/ha.

Penerapan Good Agriculture Practices (GAP) Terhadap Serapan Hara Fosfor (P) pada Daun Tanaman Kopi Arabika (Coffea arabica L.) di Provinsi Sumatera Utara Wijoyo, Hadi; Nora, Silvia; Yusuf, Mukhtar
JURNAL AGROPLASMA Vol 11, No 2 (2024): JURNAL AGROPLASMA VOLUME 11 NO 2 TAHUN 2024
Publisher : UNIVERSITAS LABUHANBATU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/agroplasma.v11i2.6301

This research aims to analyze the application of Good Agriculture Practices (GAP) to nutrient absorption in the leaves of Arabica coffee plants (Coffea arabica L.) in North Sumatra Province. Data analysis method is quantitative method. The data analysis technique used in this research is descriptive analysis technique to describe the data that has been collected through field surveys which include field observations, leaf sampling and laboratory analysis results to measure nutrient content. The results showed that the application of GAP, including good soil management, planned fertilization significantly increased nutrient uptake in the leaves. The GAP managed crops showed increased levels of phosphorus compared to those managed conventionally. The application of GAP therefore not only improves soil chemical characteristics, but also increases coffee plant productivity through optimizing nutrient uptake, which can contribute to the sustainability of coffee plantations in North Sumatra. Keywords: GAP, leaf nutrient absorption, arabica coffee, north sumatra

OPTIMALISASI KERJASAMA PENTAHELIX BERBASIS LOCAL WISDOM UNTUK MENINGKATKAN JIWA BISNIS “KAUM SARUNGAN” DI RAJABASA Suroto, Suroto; Winatha, I Komang; Rizal, Yon; Rahmawati, Fanni; Amanah, Rizki Nur; Wijoyo, Hadi; Turnip, Samuel; Rahmanto, Andi Adam
Jurnal Pengabdian Sosial Indonesia Vol 4, No 4 (2024): Jurnal Pengabdian Sosial Indonesia (JPSI)
Publisher : Universitas Lampung

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Kaum sarungan di Rajabasa, menghadapi tantangan serius dalam mengembangkan usaha mereka karena kurangnya pengetahuan dan keterampilan bisnis, akses terbatas ke modal dan pasar, serta kurangnya pemanfaatan kearifan lokal. Untuk mengatasi masalah ini, kegiatan pengabdian kepada masyarakat mengusulkan optimalisasi kerjasama Pentahelix berbasis Local Wisdom. Urgensi kegiatan ini terletak pada kebutuhan mendesak untuk memberdayakan kaum sarungan dan memperkuat ekonomi lokal, Solusi yang ditawarkan meliputi pelatihan keterampilan bisnis, fasilitasi akses ke modal, pengembangan jaringan pasar, dan integrasi kearifan lokal dalam pengembangan produk. Metode pengabdian ini mencakup penyelenggaraan Penyuluhan, Pelatihan, Diskusi dan Tanya jawab. Hasil kegiatan ini membuktikan peningkatan pemahaman jiwa bisnis kaum sarungan dan penguatan identitas budaya lokal. Keseluruhan, kegiatan ini bertujuan untuk meningkatkan jiwa bisnis kaum sarungan dan mengembangkan ekonomi Iokal Rajabasa melalui pendekatan kolaboratif yang inklusif dan berkelanjutan.Kata Kunci : Jiwa Bisnis, Local Wisdom, Pentahelix.

PENINGKATAN KEMAMPUAN INFERENSIAL STATISTIKA MELALUI PENDEKATAN MENTORING MAHASISWA PENDIDIKAN IPS FKIP UNILA Rusman, Tedi; Wulan, Mutiasari Nur; Rahmawati, Fanni; Sandi, Galuh; Turnip, Samuel; Wijoyo, Hadi; Yuliyanto, Riyan
Jurnal Pengabdian Sosial Indonesia Vol 4, No 3 (2024): Jurnal Pengabdian Sosial Indonesia (JPSI)
Publisher : Universitas Lampung

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Mahasiswa tingkat akhir sering menghadapi kendala yang cukup berarti dalam proses penyusunan tugas akhirnya, terutama pada tahap interpretasi dan pengolahan data penelitian. Kendala utama yang ditemukan adalah keterbatasan pengalaman penelitian, minimnya pengetahuan tentang program statistika, dan kesulitan dalam mengoperasikan perangkat lunak statistika. Layanan ini bertujuan untuk memberikan pendampingan guna meningkatkan kemampuan inferensial statistika mahasiswa Pendidikan Ilmu Pengetahuan Sosial Universitas Lampung. Metode yang digunakan adalah brainstorming yang dilakukan melalui tiga tahap yaitu persiapan, pelaksanaan, dan pelaporan. Kegiatan pendampingan dirancang untuk memberikan pengetahuan dan keterampilan praktis dalam penerapan statistika inferensia dan penggunaan program statistika. Evaluasi dilakukan dengan mengukur tingkat kemampuan peserta dalam memahami teknis pelaksanaan program pendampingan dan kesiapan melakukan penelitian lapangan. Hasil layanan menunjukkan bahwa pendekatan pendampingan efektif dalam membangun pemahaman, keterampilan, dan sikap profesional mahasiswa dalam mengolah data penelitian. Luaran yang diharapkan adalah meningkatnya kompetensi mahasiswa dalam mengintegrasikan pengetahuan statistika dengan praktik penelitian yang lebih komprehensif dan akurat.Kata Kunci: Kemampuan Inferensial Statistika, Pendekatan Mentoring, Pengolahan Data Penelitian

PENERAPAN KOMUNIKASI INTERPERSONAL BERBASIS LOCAL WISDOM UNTUK MENINGKATKAN KOMITMEN BERORGANISASI “KAUM SANTRI” DI RAJABASA Rusman, Tedi; Nurdin, Nurdin; Wulan, Mutiasari Nur; Karim, Rahmad Nur; Wijoyo, Hadi; Turnip, Samuel; Yuliyanto, Riyan
Jurnal Pengabdian Sosial Indonesia Vol 4, No 4 (2024): Jurnal Pengabdian Sosial Indonesia (JPSI)
Publisher : Universitas Lampung

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Pengabdian kepada masyarakat yang dilaksanakan di MWCNU Rajabasa bertujuan untuk meningkatkan komitmen berorganisasi kaum santri melalui penerapan komunikasi interpersonal berbasis kearifan lokal (Local Wisdom). Program ini dirancang untuk mengatasi masalah komunikasi interpersonal dan rendahnya komitmen berorganisasi yang teridentifikasi sebagai penghambat utama dinamika organisasi. Kegiatan ini melibatkan pelatihan komunikasi interpersonal, penggunaan teknologi komunikasi, dan proyek kolaboratif berbasis komunitas. Hasil pelatihan menunjukkan peningkatan signifikan dalam pemahaman dan penerapan nilai-nilai kearifan lokal, yang berdampak positif pada komitmen berorganisasi peserta. Skor rata-rata komitmen berorganisasi peserta meningkat dari 65 menjadi 87 setelah pelatihan. Pendekatan berbasis local wisdom ini terbukti efektif dalam memperkuat ikatan emosional dan komitmen afektif peserta terhadap organisasi, yang diharapkan dapat berkontribusi pada keberlanjutan dan kesuksesan organisasi dalam jangka panjang. Kata Kunci : Kaum Santri, Komitmen Berorganisasi, Komunikasi Interpersonal, Local Wisdom, Pelatihan

MODUL PEMBELAJARAN DIGITAL BERBASIS CASE METHOD DAN TEAM BASED PROJECT UNTUK MENINGKATKAN KREATIVITAS SISWA Winatha, I Komang; Rusman, Tedi; Suroto, Suroto; Rahmawati, Fanni; Wijoyo, Hadi; Fitriani, Nur; Afriyanto, Verdyan Nur
Jurnal Pengabdian Sosial Indonesia Vol 4, No 4 (2024): Jurnal Pengabdian Sosial Indonesia (JPSI)
Publisher : Universitas Lampung

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Pengabdian kepada masyarakat ini bertujuan untuk meningkatkan kemampuan guru dalam meningkatkan kreativitas siswa melalui penerapan modul pembelajaran digital berbasis Case Method dan Team Based Project. Kegiatan ini dilaksanakan di MTs Al Hidayah Rajabasa dengan melibatkan 22 guru sebagai peserta. Modul pembelajaran yang diterapkan dirancang untuk memberikan pengalaman belajar yang interaktif dan kolaboratif, sehingga mampu mendorong pengembangan kreativitas siswa secara efektif. Hasil dari pengabdian ini menunjukkan adanya peningkatan yang signifikan pada kemampuan guru dalam meningkatkan kreativitas siswa, yang tercermin dari perbandingan skor pre-test dan post-test. Peningkatan ini menunjukkan bahwa pendekatan pembelajaran digital berbasis Case Method dan Team Based Project efektif dalam meningkatkan kemampuan guru dalam meningkatkan kreativitas siswa. Dengan demikian, modul pembelajaran ini diharapkan dapat menjadi salah satu alternatif yang dapat diimplementasikan dalam upaya peningkatan kualitas pendidikan di era digital.Kata Kunci: Case Method, Modul Digital, Modul Pembelajaran, Kreativitas Siswa, Team Based Project.

Project Based Learning Business Communication Teaching Materials To Improve Vocational School Students' Work Readiness Winatha, I Komang; Rusman, Tedi; Suroto, Suroto; Turnip, Samuel; Wijoyo, Hadi; Rahmanto, Andi Adam
Economic Education and Entrepreneurship Journal Vol 7, No 2 (2024): Economic Education and Entrepreneurship Journal (E3J)
Publisher : FKIP Universitas Lampung

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This research aims to develop business-based communication teaching materials Project Based Learning (PjBL) which is valid and tests its effectiveness in increasing the work readiness of Vocational High School (VHS) students. This research uses the ADDIE development model which includes stages Analysis, Design, Development, Implementation, and Evaluation. The development of teaching materials is carried out based on analysis of student and industry needs, as well as validation by material experts, learning media and practitioners. The research results show that the teaching materials developed are valid and effective in improving students' business communication skills. The test results show a significant increase in pretest and posttest scores, which indicates that students are better prepared to face the world of work after using this teaching material. Apart from that, this research also found that the integration of technology in PjBL learning and collaborative learning can help students develop soft skills that are important for success in the world of work. Based on the research results, it is hoped that this teaching material can be implemented more widely in vocational schools to improve the quality of vocational education in Indonesia.DOI: http://dx.doi.org/10.23960/E3J/v7.i2.224-229

Liquid Fertilizer Solution Stirring Tool Using Arduino Uno Microcontroller Muhammadin Hamid; Aritonang, Endah Sharon; Cholillah, Putri; Afdila, Ryandika; Wijoyo, Hadi
Journal of Technomaterial Physics Vol. 7 No. 1 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i1.19854

Automatic fertilizer mixing is required to minimize fertilizer and water mixing time because manual liquid mixing takes a long time. The fertilizer used is liquid, often known as effective microorganisms 4 (EM4) solution. To perfect the stirrer, which is still rotated manually, the DC motor provides speed control for the automatic liquid fertilizer mixer. The speed can be reduced by utilizing the Arduino Uno microcontroller so that the motor rotates according to the required speed. The main mechanical components consist of a DC motor, Arduino Uno as a microcontroller, a power supply as a source of electric current, and a container for mixing liquid fertilizer. The infrared (IR) sensor achieved high accuracy in measuring mixer rotational speed for EM4 fertilizer, with percentage errors ranging from 0.2% to 1.8% compared to tachometer readings. However, when applied to green fertilizer, the error rates varied widely, from 0.03% up to 28.05%, indicating significant fluctuations. These results highlight that the IR sensor is quantitatively reliable for EM4 fertilizer applications but requires further calibration to ensure consistent performance with other fertilizer types

Project Based Learning Business Communication Teaching Materials To Improve Vocational School Students' Work Readiness Winatha, I Komang; Rusman, Tedi; Suroto, Suroto; Turnip, Samuel; Wijoyo, Hadi; Rahmanto, Andi Adam
Economic Education and Entrepreneurship Journal Vol 7, No 2 (2024): Economic Education and Entrepreneurship Journal (E3J)
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

This research aims to develop business-based communication teaching materials Project Based Learning (PjBL) which is valid and tests its effectiveness in increasing the work readiness of Vocational High School (VHS) students. This research uses the ADDIE development model which includes stages Analysis, Design, Development, Implementation, and Evaluation. The development of teaching materials is carried out based on analysis of student and industry needs, as well as validation by material experts, learning media and practitioners. The research results show that the teaching materials developed are valid and effective in improving students' business communication skills. The test results show a significant increase in pretest and posttest scores, which indicates that students are better prepared to face the world of work after using this teaching material. Apart from that, this research also found that the integration of technology in PjBL learning and collaborative learning can help students develop soft skills that are important for success in the world of work. Based on the research results, it is hoped that this teaching material can be implemented more widely in vocational schools to improve the quality of vocational education in Indonesia.DOI: http://dx.doi.org/10.23960/E3J/v7.i2.224-229

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