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All Journal Civil Engineering Forum Teknik Sipil JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Indonesian Journal of Science and Technology Jurnal Agrotek Tropika Journal of Tropical Crop Science At-tijaroh: Jurnal Ilmu Manajemen dan Bisnis Islam Journal Coaching Education Sports Jurnal Pengabdian Nasional Jurnal Plano Buana Indonesian Journal of Multidiciplinary Research (IJoMR) Applied Research in Science and Technology QISTINA: Jurnal Multidisiplin Indonesia Eduvest - Journal of Universal Studies Jurnal Cendekia : Media Komunikasi Penelitian dan Pengembangan Pendidikan Islam IIJSE Abuya: Jurnal Pendidikan dasar Jurnal Pengabdian dan Pemberdayaan Masyarakat Inovatif Ghulamuna
Ali Rahmat
Staf Sabo Technical Centre, Yogyakarta
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Neuroscience Nursing Physics Social Sciences Transportation Other

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Removal of Methylene Blue by Adsorption onto Activated Carbon From Coconut Shell (Cocous Nucifera L.) Khuluk, Rifki Husnul; Rahmat, Ali; Buhani, Buhani; Suharso, Suharso
Indonesian Journal of Science and Technology Vol 4, No 2 (2019): IJOST: VOLUME 4, ISSUE 2, 2019
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v4i2.18179

Abstract

This research has been conducted on process of production activated carbon from coconut shells, which are activated both physics and chemistry to improve the adsorption of methylene blue. The process of physical activation was done by burning the coconut shell using a furnace at a temperature of 700°C. The chemical activation was done using H3PO4 activator. The result of activated carbon physical activation (CAP) has a greater absorbency than activated carbon chemical activation (CAC) with each of the absorption of methylene blue at 99.42 and 98.64%. Analysis of surface morphology on the adsorbent was performed using a Scanning Electron Microscope (SEM). SEM results indicated that (CAP) has a surface morphology that is relatively similar to commercial activated carbon (CACm). Adsorption test was conducted on the determination of the optimum pH, adsorption rate, and isotherm adsorption of methylene blue. The results of the optimum pH on CAC, CAP, and CACm respectively obtained at pH 8 and the optimum contact time is obtained respectively at 40, 60, and 80 minutes. Adsorption kinetics data of methylene blue on CACm, CAP, and CAC tend to follow the pseudo second order kinetics with a correlation coefficient (R2) is 0.937; 0.950; and 0.999, respectively. Adsorption isotherm of methylene blue on CACm, CAP, and CAC tend to follow the model of Freundlich isotherms.
PENGELOLAAN SEDIMEN KALI GENDOL PASCA ERUPSI MERAPI JUNI 2006 Rahmat, Ali; Legono, Djoko; Kusumosubroto, Haryono
Civil Engineering Forum Teknik Sipil Vol 18, No 2 (2008): MEI 2008
Publisher : Civil Engineering Forum Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (442.364 KB)

Abstract

The Gendol River, with its catchment area of 66 km2 and the river length of about 22 km, originates from the south east of Mount Merapi. Nineteen sabo dams have been built in order to anticipate and control sediment disaster. The most upstream dam is Kaliadem (+1.100 msl) and the most downstream dam is consolidation dam of GE-C0 (+163 msl). Sand mining occurs at several points along the river and cause environmental damage. In order to conserve environment and to maintain sediment balance a proper sediment management is required. The research is conducted based on sediment balance. The analysis of transportable sediment volume (VS) is conducted using empirical formula of Takahashi (1991) and Mizuyama (1977). Over flow sediment volume (VE) was analyzed using empirical equation of Shimoda (1995). Sediment balance was analyzed based on maximum daily rainfall (R24) with 25 years return period. The result of the study shows that the sabo system in Gendol River effectively works to control lahar flow. As a conclusion, the existing sabo dams are able to maintain sediment balance in Gendol River. The possible amount of sand mining is estimated about 1.253.422 m3 and the allowable daily sand mining volume is estimated about 836 m3 per day.
Utilization of Stem Bark and Leaves of Kluwih (Artocarpus Altilis Park) as an Anti-Mosquito Repellent: A Case Study of Total Mosquito Mortality (Anopheles Sp) Kurniawan, Betta; Puspita, Laila; Kurnia, Yogi; Husna, Ismalia; Rahmat, Ali; Umam, Rofiqul; Andriana, Bibin B.; Jermsittiparsert, Kittisak
Indonesian Journal of Science and Technology Vol 5, No 3 (2020): IJOST: VOLUME 5, ISSUE 3, 2020
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v5i3.25370

Abstract

The purpose of this study was to demonstrate an alternative solution as an insecticide from Indonesian natural ingredients. We investigated the potential use of Artocarpus altilis park (known as kluwih plants in Indonesia) for an anti-mosquito repellent because it contains flavonoids and saponins. The use of this type of insecticide is harmless, inexpensive, and largely available in Indonesia. In the experiment, we extracted bark and leaves of kluwih to obtain insecticidal material to repel Anopheles sp. To ensure the precise extraction and insecticidial effect, the experiments were conducted four times with three repetitions. For each experiment, we used 8.4 mL with the concentrations of 20, 30, and 40% of flavonoid. The results showed that the higher the concentrations of bark and leaf extracts of Artocarpus altilis park the higher the mortality rate of Anopheles sp is.
Analisis Tingkat Kehijauan Lahan Daerah Sukarame, Bandar Lampung Dengan Metode Ndvi Berdasarkan Citra Landsat Tahun 2000 dan 2020 Jannah, Anisa Miftakhul; Rahmat, Ali; Ramadhani, Winih Sekaringtyas; Istiawati, Novia Fitri
Jurnal Plano Buana Vol 2 No 1 (2021): Jurnal Plano Buana (Edisi Oktober 2021)
Publisher : Program Studi Perencanaan Wilayah dan Kota, Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (555.684 KB) | DOI: 10.36456/jpb.v2i1.3494

Abstract

Sukarame merupakan salah satu kecamatan yang ada di Kota Bandar Lampung dengan kepadatan penduduk yang tergolong tinggi. Secara administrasi pada tahun 2020, di wilayah Kecamatan Sukarame terdapat 6 kelurahan, 118 RT dan 12 lingkungan berdasarkan data dari kantor Kecamatan Sukarame. Jumlah penduduk di Kecamatan Sukarame yaitu, 66.124 jiwa. Kebutuhan akan tempat tinggal akan meningkat setiap tahunnya, namun tidak dibarengi dengan lahan pemukiman yang tersedia. Terbatasnya lahan pemukiman mendorong terjadinya perubahan penggunaan lahan dan penurunan kualitas lingkungan. Saat ini teknologi penginderaan jauh sudah semakin canggih, sehingga dapat mendeteksi sebaran vegetasi pada suatu wilayah, pola sebaran vegetasi, kerapatan vegetasi serta luas vegetasi. Indeks vegetasi digunakan untuk menggambarkan intensitas tanaman pada suatu wilayah pada citra. Indeks vegetasi yang banyak digunakan adalah NDVI (Normalized Difference Vegetation Index). Jumlah Ground Control Point (GCP) yang digunakan sebanyak 30 titik dengan rincian masing-masing 10 titik wilayah lahan terbuka dengan titik berwarna merah, vegetasi rendah dengan titik berwarna kuning dan vegetasi sedang dengan titik berwarna hijau. Pada tahun 2000 lahan yang memiliki vegetasi masih cukup banyak, namun pada tahun 2020 akibat meningkatnya lahan terbuka menyebabkan berkurangnya jumlah vegetasi. Untuk hasil yang didapat dari groundcek, terdapat beberapa lokasi yang kurang akurat sehingga tingkat keakuratan lokasi pada peta tutupan lahan tahun 2020 sebesar 93,3%.
Analysis of Cassava Peel and Pineapple Peel as Electrolytes in Bio Battery Sitanggang, Julia Elisabeth; Latifah, Nur Zahra; Sopian, Opi; Saputra, Ziyan; Nandiyanto, Asep Bayu Dani; Anggraeni, Sri; Rahmat, Ali
Indonesian Journal of Multidiciplinary Research Vol 1, No 1 (2021): IJOMR: VOLUME 1, ISSUE 1, 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1436.194 KB) | DOI: 10.17509/ijomr.v1i1.33774

Abstract

This study investigated the effect of the ratio of the electrolyte paste mixture of cassava peel (CP) and pineapple peel (PP) on the voltage and current strength. In the experiments, prior to using, CP and PP biomass waste was cleaned then soaked for 30 minutes. Furthermore, the biomass waste is mashed and put into the test media according to the comparison. In this study, CP/PP compositions were varied with the value of 100: 0; 75:25; 50:50; 25:75; and 0: 100. The results showed that the highest electrolyte obtained by voltage and current strength with a ratio of 100: 0. The more CP comparisons used, the greater the voltage and strong current. This research is potentially used as one of the renewable alternative energies and can utilize existing biomass waste.
DIVERSIFIKASI KOPI MENJADI MASKER SEBAGAI PRODUK UNGGULAN KELOMPOK WANITA TANI DESA MANGGARAI, KECAMATAN AIR HITAM, KABUPATEN LAMPUNG BARAT Rahmat, Ali; Farida, Nurul; Sadikin, Yuni; Ramadhani, Winih Sekaringtyas; Yanfika, Helvi; Mutolib, Abdul; Widyastuti, Raden Ajeng Diana
Jurnal Pengabdian Nasional Vol 1 No 1 (2020)
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jpn.v1i1.1580

Abstract

Pelatihan pembuatan dan pengemasan masker kopi dilatarbelakangi oleh banyaknya produksi kopi di Desa Manggarai, salah satu desa peghasil kopi robusta di Kabupaten Lampung Barat. Namun, karena minimnya infomasi, pengalaman dan edukasi, kopi hanya dijual dalam bentuk mentah atau bubuk kopi saja, oleh sebab itu diperlukan adanya diversivikasi olahan kopi yang dapat meningkatkan nilai jual kopi, salah satunya adalah masker berbahan dasar kopi. Kegiatan ini dilaksanAkan pada 25 Januari 2020 di Desa Manggarai dengan diikuti oleh 24 peserta dari ibu ibu kelompok wanita tani dan BUMDES dengan di pandu dengan mahasiswa KKN Unila. Kegiatan yang dilakukan yaitu dimulai dengan penjelasan mengenai produk turunan dari kopi yang dapat dimanfaatkan sebagai masker yang berfungsi sebagai produk perawatan wajah, kemudian dilanjutkan praktik pembuatan masker. Masker berbahan dasar campuran antara kopi, kunyit dan beras dimana ketiga bahan tersebut masing masing diblender kemudian dicampur menjadi satu, setelah itu dilakukan pengemasan dan ditempel stiker yang telah didesain sebelumnya. Dari kegiatan tersebut diharapkan peserta dapat mengadopsi dan menduplikasi sebagai produk unggulan desa yang dapat di jual melalui BUMDES. Testimoni peserta yang mencoba adalah jerawat menjadi cepat kempes dan adanya rasa lebih baik/segar pada wajah setelah memakai masker.
Pelatihan Manajemen Kelompok dan Kewirausahaan Pada Kelompok Wanita Tani Bunda Jaya di Kecamatan Adiluwih Kabupaten Pringsewu Mutolib, Abdul; Rahmat, Ali; Yanfika, Helvi; Ruslan, Januar Arifin
Jurnal Pengabdian dan Pemberdayaan Masyarakat Inovatif Vol. 1 No. 1 (2022): Jurnal Pengabdian dan Pemberdayaan Masyarakat Inovatif
Publisher : Research and Social Study Institute (RESSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70110/jppmi.v1i1.4

Abstract

Tujuan kegiatan Pengabdian Kepada Masyarakat adalah meningkatkan pengetahuan anggota KWT Bunda Jaya pada aspek keuangan kelompok dan ketahanan pangan rumah tangga, dan mendukung pengembangan usaha KWT Bunda Jaya untuk meningkatkan pendapatan kelompok.   Kegiatan Pengabdian Kepada Masyarakat akan dilaksanakan selama empat bulan dari bulan Juli hingga September 2020. Kegiatan pengabdian dilakukan dengan dua metode, yaitu metode pelatihan dan pendampingan.  Kegiatan pelatihan dilakukan dengan ceramah (peyampaian materi).  Kegiatan pendampingan dilakukan setelah pelatihan untuk memastikan KWT dapat lebih produktif dan berkembang sesuai tujuan pengabdian yaitu meningkatkan kesejahteraan anggota KWT.  Tingkat pengetahuan anggota KWT terhadap ketahanan pangan rumah tangga meningkat dari 35,00% menjadi 80,00%.  Tingkat pengetahuan tentang  manajemen keuangan kelompok meningkat dari 45,00% menjadi 90,00%, dan tingkat pengetahuan tentang usaha kreatif/kewirausahaan meningkat dari 40,00% menjadi 85,00 %.  Kegiatan Pengabdian telah meningkatkan pengetahuan anggota KWT Bunda Jaya pada aspek tahanan pangan, manajemen keuangan kelompok dan kewirausahaan/usaha kreatif. Modal yang diberikan kepada Warung Kewairausahaan KWT Bunda Jaya adalah sebesar Rp. 3.000.000,- dan pada bulan ketiga (September 2020) modal usaha telah berkembang menajdi Rp. 3.450.000.  Keuntungan Warung Kewirausahaan yang dikelola KWT Bunda Jaya telah meningkat sebesar 15% dari modal usaha yang diberikan.  Total aset KWT Bunda Jaya pada awal pengabdian adalah Rp. 6.180.000 dan menjadi Rp. 9.630.000 setelah kegiatan pengabdian kepada masyarakat.
Quality analysis of coffee waste compost with the addition of cassava tapai local microorganism (LMO) bioactivator Sukmawati, Fitria Nugraheni; Irna, Afifah; Pramudya, Yudhi; Sukarji, Sukarji; Pamungkas, Saktiyono Sigit Tri; Rahmat, Ali; Rozaki, Zuhud; Hanum, Farrah Fadhillah
Applied Research in Science and Technology Vol. 3 No. 2 (2023): Applied Research in Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/areste.v3i2.46

Abstract

Coffee waste contains a large amount of nutrients, making it a potential raw material for compost fertilizer. The nutrients contained in coffee waste include N, P, K, Mg, and Ca. Utilization of coffee waste as compost requires bioactivators to accelerate the decomposition process. This study aims to determine the difference in compost quality from coffee waste by using bioactivators in the form of local microorganisms (LMO) of cassava tapai. This study was conducted from April to May 2023 at the greenhouse of LPP Polytechnic Yogyakarta, consisting of two stages: making the LMO and making the compost. Cassava tapai LMO was prepared as a treatment for composting coffee waste. Each treatment was repeated three times. After that, the fermentation results in the form of compost were tested, then the results were compared with the standards of the Decree of the Minister of Agriculture No. 261/KPTS/SR.310/M/4/2019 on the minimum technical requirements for organic fertilizers, biological fertilizers, and soil conditioners. The results reveal that the provision of cassava tapai LMO bioactivator affected the quality of coffee waste compost produced. The quality of composts produced from control, cassava tapai LMO of 90 ml, and EM-4 treatment does not meet the standards of the Decree of the Minister of Agriculture in the parameter of chemical properties, namely the C/N ratio. The quality of compost produced from cassava tapai LMO of 120 ml meets the standards of the Decree of the Minister of Agriculture and SNI 2004 in all parameters of physical properties, chemical properties, and nutrient content.
Belajar Moderasi Beragama dari Pesantren Rahmat, Ali
CENDEKIA Vol. 16 No. 01 (2024): Cendekia March 2024
Publisher : Fakultas Agama Islam Universitas Billfath

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37850/cendekia.v16i01.614

Abstract

Currently, we are faced with a reality of social life that has the potential to undermine the ideology of the nation and state. This is caused by several factors, such as: the emergence of subjective truths regarding religious understanding and the growth of excessive religious thought patterns and attitudes. The aim of this research is to find out that the concept of religious moderation exists at the Annuqayah Islamic boarding school. The approach used in this research is a qualitative approach. The type of research is a case study. Data and information collection techniques use interview, observation, FGD and documentation methods. Meanwhile, the data analysis method uses descriptive analysis. The research results show that the concept of religious moderation found in the Annuqayah Islamic boarding school is in the form of concepts, principles, values ​​and practices that reflect moderation. Annuqayah Islamic Boarding School understands Islam as a religion that stands in the middle. This moderate attitude also means keeping oneself from acting ifrath and tafrith. The principles of religious moderation in Annuqayah are tawassuth (middle), i'tidal (upright and proportional), tasamuh (tolerant), tawazun (balance); musawah (egalitarian). Kiai Annuqayah's strategy in establishing religious moderation is as follows; amaliyah ubudiyah, amaliyah diniyah, amaliyah ijtimaiyyah, and amaliyah siyasiyyah.
Assesing Flood Discharge Dynamics in Surakarta Through Land Cover Mapping with Sentinel-2A Ikafitri N, Fridya; Hadiani, Rr Rintis; Rahmat, Ali
Eduvest - Journal of Universal Studies Vol. 5 No. 5 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i5.51126

Abstract

Rapid urbanization in Surakarta, Central Java, has transformed land cover, reducing water absorption capacity and increasing flood frequency. While global studies link land cover changes to flood risks, localized analyses in Surakarta remain scarce. This study aims to (1) map land cover changes (2019–2023) using Sentinel-2A imagery, (2) quantify their impact on runoff coefficients and flood discharge, and (3) evaluate classification accuracy against government data. Land cover was classified via MLC (97% accuracy) and validated against BPS and Ministry of Environment and Forestry data. Hydrological modeling combined HSS Gama I and SCS methods in HEC-HMS, with rainfall data analyzed using Thiessen polygons and Gumbel distribution. Urbanization increased the runoff coefficient by 23.12%, raising flood discharge by 23.47% (Gajah Putih) and 23.33% (Pepe Hulu). Sentinel-2A outperformed government data (79% accuracy) in land cover mapping. The findings underscore the urgency of integrating high-accuracy remote sensing into urban planning. Future research should explore machine learning for real-time flood prediction and policy-driven mitigation strategies.
Co-Authors Abdul Mutolib Aimmatul Umami Andriana, Bibin B. Asep Bayu Dani Nandiyanto Betta Kurniawan, Betta Buhani Buhani Damayanti, Faiz Diah Permata Dikpride Despa Djoko Legono Fitria Nugraheni Sukmawati, Fitria Nugraheni Ginting, Ega Akia Fadila Br Habibi, M. Arya Hadiani, Rr Rintis Hanum, Farrah Fadhillah Haryono Kusumosubroto Hasan, Asya Hayane Adeline Warganegara, Hayane Adeline Hayati, PK Dewi Helvi Yanfika Husna, Ismalia Husni, Muhammad Rizky Ibrahim Ibrahim Ikafitri N, Fridya Indah Listiana Indra Dwipa Irna, Afifah Istiawati, Novia Fitri Jannah, Anisa Miftakhul Jermsittiparsert, Kittisak Kaban, Ika Oktarina Br Khuluk, Rifki Husnul Kurnia, Yogi Kus Hendarto, Kus Laila Puspita Latifah, Nur Zahra Marwansyah, Marwansyah Muhammad Taufiq Ramadhan Nehe, Revan Nando Nurmina, Nur Nurul Farida Pramudya, Yudhi Purba, Ilham Ari Affandi Raden Ajeng Diana Widyastuti Ramadhani, Winih Sekaringtyas Rofiqotul Musyarrofah Rofiqul Umam Rozaki, Zuhud Ruslan, Januar Arifin S. Nur Karimah Sadikin, Yuni Saktiyono Sigit Tri Pamungkas, Saktiyono Sigit Tri Sandi Asmara Saputra, Ziyan Sinaga, Boy Fernando Sitanggang, Julia Elisabeth situmorang, michael Sobar Sutisna Sofyan Rizal, Sofyan Sopian, Opi Sri Anggraeni Suharso Suharso Sukarji, Sukarji Syafiq, Muhammad Nabil Shal Ulya, Annisa Wilopo Wilopo, Wilopo Yul Martin