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All Journal BERKALA FISIKA SAINS DAN MATEMATIKA Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) Jurnal Keteknikan Pertanian Tropis dan Biosistem Sasando : Jurnal Bahasa, Sastra Indonesia, dan Pengajarannya Social Science Academic
Agung Cahyono
Physics Department, Faculty of Sciences and Mathematics, Diponegoro University
Religion Agriculture, Biological Sciences & Forestry Humanities Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences Other

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Penggunaan Lindi Hitam Pada Proses Pretreatment Tandan Kosong Kelapa Sawit (Elaeis Guineensis) Cahyono, Agung; Nugroho, Wahyunanto Agung; Kadarisman, Darwin; Muryanto, .
Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol 4, No 1 (2016)
Publisher : Universitas Brawijaya

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Abstract

Untuk mengurangi biaya produksi, larutan alkali bekas (lindi hitam, LH) yang diperoleh dari pretreatment tandan kosong kelapa sawit (TKKS) skala pilot plant pada kondisi optimal (NaOH 2,5 M; 150oC; 4 bar; 30 menit) dimanfaatkan sebagai pelarut pada pretreatment TKKS berikutnya. Penelitian ini bertujuan untuk melakukan pretreatment TKKS berbasis alkaline explosion pretreatment dengan perlakuan penelitian meliputi rasio pelarut LH : NaOH 2,5 M (100% LH, 50% LH: 50% NaOH dan 30% LH: 70% NaOH) dan waktu pretreatment (30 menit, 45 menit dan 60 menit). Perbandingan massa TKKS dan volume pelarut adalah 1:5 (500 gram TKKS dan 2500 mL pelarut). Berdasarkan hasil penelitian, TKKS sebelum pretreatment mengandung 328,0 mg/g selulosa, 137,4 mg/g hemiselulosa, 301,6 mg/g lignin dan 22,3 mg/g abu. Perlakuan optimal didapatkan pada perlakuan 30% LH: 70% NaOH dan waktu pretreatment 30 menit  dengan kadar selulosa sebesar 261,31 mg/g dan kadar hemiselulosa serta lignin masing-masing sebesar 44,74 mg/g dan 55,54 mg/g. Kata kunci : Bioetanol, Delignifikasi, Lignoselulosa, Tandan Kosong Kelapa Sawitnocellulose, Empty Fruit Bunches
Estimasi Arah Strike menggunakan Metode Resistivitas Konfigurasi Persegi Cahyono, Agung; Yulianto, Gatot
BERKALA FISIKA Vol 10, No 1 (2007): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

The sounding square array resistivity method had been used to estimate strike orientation in a sub surface anomaly model. The advantage of square array are more sensitif in an anisotropic medium such as strike than inline array. Strike is an important factor to placed an array configuration in resistivity method. The array commonly lay down paralel or perpendicular with a strike depend on anomaly structure. The mapping square array was used to detect the model anomaly.The sounding square array were measured by rotating array with azimuth ,,, and . The sounding square array had an electrode spacing 1 m, 1,4 m, 2 m and 2,8 m. Azimuthal apparent resistivity was  obtained by calculation and then was plotted into Rossete diagram. The estimation of strike orientation was determined perpendicularly from maximum azimuthal apparent resistivity. The mapping square array used 10 m array spacing with 1 m electrode spacing. The Wenner array used 5 m with 0,5 m electrode spacing.Strike orientation was estimated on N 90 E. This estimation was based on result each electrode spacing on the sounding square array. The existing model anomaly were detected on 5 m until 7 m on mapping square array. The result of Wenner array modeling showed that anomaly model was detected on 2,5 m until 3,5 m on N 40 W. This result showed that the sounding square array can be applied to determine strike orientation which usually exist on geological structure Keywords: square array resistivity, strike,azimuth
The Effect of BaCO3 Compound Changes on the Formation of Magnetic Material BaFe12O19 Priyono, Priyono; Cahyono, Agung; Marhaendrajaya, Indras; Subagio, Agus; Gunawan, Vincensius
JURNAL SAINS DAN MATEMATIKA Volume 23 Issue 4 Year 2015
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

BaFe12O19 is a permanent magnetic material which has superior properties to be excellent until the late of twentieth century. Some of the obstacles in the synthesis of the material using a stoichiometric composition is a difficulty to obtain a single phase and the second phase is always found. This research attempted to make modifications on the initial non-stoichiometric composition by varying the fraction of Ba/Fe through BaCO3 and Fe2O3 compound through solid state reaction mechanism. This solid state reaction was initiated by mixing various fractions of BaCO3 and Fe2O3 powder composition and compacted to produce a homogeneous mixture using a planetary milling. After drying and molding, it was obtained a homogeneous mixture like a cylinder with a diameter of 2:54 cm and a thickness of 0.5 cm. The BaFe12O19 phase was obtained by heating the sample at a temperature of 1200 ° C for 4 hours. To determine changes in the fraction of Ba/Fe before and after sintering, the samples were tested by X-Ray Fluorescence (XRF), while the structure and crystallinity were tested by X-ray diffraction (XRD) and Scanning Electron Microscope (SEM). The results showed that during the heating process, the reduction of barium fractions exceeded 5% from of their initial weight, while changes in the fraction of Fe was not significant. The results of structure and crystallinity measurement showed that the addition a substantial amount of barium carbonate can lead to the decrease of crystallinity from 35.271 nm to 11.265 nm.
PENINGKATAN KEMAMPUAN MENULIS PUISI DENGAN METODE ESTAFET WRITING PADA SISWA KELAS VIII A SMP NEGERI TANJUNG CAHYONO, AGUNG
Sasando Vol 1 No 1 (2018): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24905/sasando.v1i1.7

Abstract

Menulis secara berantai (estafet writing) termasuk salah satu metode active learning atau learning by doing bertujuan agar siswa mengasosiasikan belajar sebagai kegiatan yang menyenangkan. Para siswa diberi kebebasan mengekspresikan imajinasinya melalui tulisan-tulisan yang dihasilkan seperti menulis puisi. Kegiatan menulis puisi dengan menggunakan metode estafet writing ini juga dapat dimanfaatkan untuk menguji kompetensi siswa dalam membangun kalimat dalam sebuah paragraf.
PENERAPAN METODE PEMBELAJARAN QUANTUM TIPE TEKNIK PETA KONSEP DALAM RANGKA MENINGKATKAN KEMAMPUAN BERPIKIR KREATIF DAN HASIL BELAJAR SISWA Cahyono, Agung
Jurnal Pendidikan dan Pembelajaran Khatulistiwa Vol 6, No 9 (2017): September 2017
Publisher : Jurnal Pendidikan dan Pembelajaran Khatulistiwa

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Abstract

AbstractThis study reviews the application of learning methods of quantum type of concept maps in order to improve the ability to think creatively and student learning outcomes on economic subjects in vocational Kubu Raya Development. The method used in this study is a research method True Experiment Experiment with the shape and the experimental design used is pretest - posttest control group design. The population in this study is a class XI student of SMK AKT Development amounted to 96 students with a sample of 64 students. The data collection tool in this study a test sheet and observation sheet. Data was analyzed using quantitative data analysis and descriptive statistics. The results showed that the application of quantum learning method in class experiment goes well. Application of quantum learning methods can enhance students' ability to think creatively on economic subjects in vocational Kubu Raya Development. Through t test, t known at 37.185 and Sig. (2-tailed) 0.000 (0.000 <0.005) showed an increase of quantum methods in creative thinking abilities.Keywords: Quantum Learning Method, Creative Thinking Skills, Learning Outcome
Kurikulum dan Pola Ilmu Pengetahuan Pada Masa Orde Lama dan Orde Baru Anitasari, Lia; Cahyono, Agung
Social Science Academic Vol 1 No 2 (2023)
Publisher : Institut Agama Islam Sunan Giri Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37680/ssa.v1i2.3390

Abstract

This article aims to describe the history of the development of the Indonesian education curriculum during the Old Order, New Order and Reformation periods. Curriculum changes are made at least once every ten years. Because in the past ten years, it is very likely that there will be changes in various fields such as information communication technology and science. The method used in this research is historical as used in data collection techniques in library research. The object of study in this article focuses on tracing the history of curriculum development in Indonesia from the Old Order to the Reformation. The results of this study indicate that the curriculum in Indonesia has been developed twelve times, namely in 1947, 1952, 1964, 1968, 1973, 1975, 1984, 1994, 1999, 2004, 2006 and 2013. From this article it is hoped that it can educate the history of development existing curriculum in Indonesia.
Enhanced Cellulose Content in Microwave-Assisted Sulfuric Acid Pretreatment of Java Grass Cahyono, Agung; Khotimah, Mujaroh; Ashabi, Arman
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 12 No. 2 (2024): August 2024
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2024.012.02.06

Abstract

This study investigated the enhancement of cellulose content in Java grass (Cyperus rotundus) through microwave-assisted sulfuric acid pretreatment. The research involved soaking Java grass in varying concentrations of H2SO4 (1.5%, 3%, and 4.5%) and subjecting it to microwave irradiation at 2450 MHz for different durations (25, 35, and 45 minutes). The results showed that the highest cellulose content of 43.61% was achieved with a 1.5% H2SO4 solution for 45 minutes, representing a 90.3% increase from the pre-treatment level of 22.91%. The microwave-assisted pretreatment effectively disrupted the lignocellulosic structure, reduced cellulose crystallinity, and increased biomass surface area, thereby enhancing enzymatic hydrolysis. However, an anomaly was observed in the lignin content, which increased from 14.3% to 36.65% post-treatment, likely due to errors in lignin determination and the formation of pseudo-lignin.
Kurikulum dan Pola Ilmu Pengetahuan Pada Masa Orde Lama dan Orde Baru Anitasari, Lia; Cahyono, Agung
Social Science Academic Vol. 1 No. 2 (2023)
Publisher : Institut Agama Islam Sunan Giri Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37680/ssa.v1i2.3390

Abstract

This article aims to describe the history of the development of the Indonesian education curriculum during the Old Order, New Order and Reformation periods. Curriculum changes are made at least once every ten years. Because in the past ten years, it is very likely that there will be changes in various fields such as information communication technology and science. The method used in this research is historical as used in data collection techniques in library research. The object of study in this article focuses on tracing the history of curriculum development in Indonesia from the Old Order to the Reformation. The results of this study indicate that the curriculum in Indonesia has been developed twelve times, namely in 1947, 1952, 1964, 1968, 1973, 1975, 1984, 1994, 1999, 2004, 2006 and 2013. From this article it is hoped that it can educate the history of development existing curriculum in Indonesia.
Co-Authors . Muryanto, . Agus Subagio Anitasari, Lia Ashabi, Arman Darwin Kadarisman Gatot Yulianto Indras Marhaendrajaya Mujaroh Khotimah, Mujaroh Priyono Priyono Vincensius Gunawan S.K. Wahyunanto Agung Nugroho