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All Journal International Journal of Renewable Energy Development JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) International Journal of Renewable Energy Development Kesatria : Jurnal Penerapan Sistem Informasi (Komputer dan Manajemen)
AGUS SULISTIYONO
Renewable Energy Research Centre, Department of Chemical Engineering, Faculty of Engineering, Universitas Muhammadiyah Surakarta, Kartasura
Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering

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Utilization of Iles-Iles and Sorghum Starch for Bioethanol Production Kusmiyati, Kusmiyati; Sulistiyono, Agus
International Journal of Renewable Energy Development Vol 3, No 2 (2014): July 2014
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.3.2.83-89

Abstract

The aims of this study were to convert the starches from iles-iles tubers (Amorphophalus campanulatus) and sorghum grains (Sorghum bicolor L) into bioethanol as an alternative energy. Both of these agricultural products contains a high content starches and they do not use as the major foods in Indonesia. To find out the maximum ethanol concentration and yield, both the raw materials were converted to ethanol on various process variables including the concentration of flour substrate solution (100-300 g/L), β-amylase enzyme concentration (0.8 - 6.4 ml/kg of flour ), the  concentration of dry yeast S. cerevisiae (2-15 g), and fermentation time (72-168 hours). The results showed that at the flour substrate concentration of 250 g/L produced the maximum ethanol contents of 100.29 g/L and 95.11 g/L   for iles-iles and sorghum, respectively. Effect of β-amylase enzyme in the saccharification process showed that at concentration  of 3.2 ml/kg  the maximum reducing sugar content of 204.94 g/L and 193.15 g/L  for iles-iles and sorghum substrate, respectively were generated therefore it was corresponding to the maximum ethanol production. The concentration effect of dry yeast S. cerevisiae in the fermentation stage for the iles-iles and sorghum substrate revealed that the maximum ethanol obtained at 5 g yeast activated in 100 ml medium starter resulted the highest ethanol content 100.29 g/L 95.11 g/L for iles-iles and sorghum substrate, respectively. To determine the effect of fermentation time on ethanol yield from iles-iles and sorghum substrate, the fermentation process were performed at 3, 5, and 7 days. The maximum ethanol fermentation was obtained at 5 days fermentation. The ethanol yield is calculated by weight of ethanol is formed (g) divided by the weight of flour (g). Based on the experiment results, conducted, generally the highest ethanol yield of iles-iles was higher than that of sorghum flour. The highest yield (g/g) iles-iles and sorghum flour were 71.25 and 68.92 respectively
Evaluasi Tata Kelola dan Manajemen Risiko Unit Teknologi Informasi dan Pangkalan Data pada Perguruan Tinggi Keagamaan Islam Negeri XYZ dengan Menggunakan Framework COBIT 2019 Sulistiyono, Agus; Kusrini, K
Kesatria : Jurnal Penerapan Sistem Informasi (Komputer dan Manajemen) Vol 5, No 4 (2024): Edisi Oktober
Publisher : LPPM STIKOM Tunas Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30645/kesatria.v5i4.512

Abstract

The Information Technology and Data Base Unit (UTIPD) is one of the units at the XYZ State Islamic Religious College (PTKIN) which is tasked with managing and developing information system management, network and application maintenance, managing databases, and developing other information technology (IT). This research aims to evaluate governance and risk management at UTIPD at PTKIN XYZ. As a higher education institution that continues to develop, PTKIN XYZ relies heavily on information technology to support its operations, administration and academic activities. However, with the increasing complexity of information systems and associated risks, an in-depth evaluation of how IT governance and risk management is implemented is needed. The COBIT 2019 framework, which is an international standard framework for IT governance and management, is used in this research to assess IT governance and risk management capabilities at UTIPD. The primary focus of this evaluation is to determine the extent to which current IT governance practices meet expected standards, as well as to identify areas requiring improvement. This research includes an analysis of COBIT 2019 domains that are relevant to IT governance and risk management. The results of this research show that the APO07 domain and APO12 domain processes only obtained capability level 2 and obtained a gap value (GAP) of 1 each. In addition, this research also presents recommendations for improving IT governance and risk management at PTKIN XYZ, with the aim of Finally, to ensure that this university can utilize information technology optimally, reduce risks, and support the achievement of its strategic goals. It is hoped that the findings from this research can become a reference for PTKIN XYZ and other higher education institutions in strengthening IT governance and risk management.
Manajemen Risiko Unit Teknologi Informasi dan Pangkalan Data pada Perguruan Tinggi Keagamaan Islam Negeri XYZ dengan Menggunakan Framework COBIT 2019 Sulistiyono, Agus; Kusrini, Kusrini
JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) Vol 10, No 4 (2025)
Publisher : STKIP PGRI Tulungagung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29100/jipi.v10i4.6641

Abstract

Unit Teknologi Informasi dan Pangkalan Data (UTIPD) adalah salah satu unit di Perguruan Tinggi Keagamaan Islam Negeri (PTKIN) XYZ yang bertugas mengelola dan mengembangkan manajemen sistem informasi, perawatan jaringan dan aplikasi, mengelola basis data, serta mengembangkan teknologi informasi lainnya. Dalam pelaksanaan tugasnya, UTIPD memerlukan adanya manajemen risiko. Manajemen risiko mempunyai peranan penting supaya UTIPD pada PTKIN XYZ mampu mengatasi dan juga meminimalisir ancaman yang ada di era digital saat ini. Penelitian ini menjelaskan penerapan Framework COBIT 2019 sebagai dasar untuk mengelola risiko yang mungkin timbul dalam operasional UTIPD pada PTKIN XYZ menggunakan 2 domain, yaitu EDM03 dan APO12. Selain itu, penelitian ini diharapakan mampu memberikan kerangka kerja komprehensif untuk mengidentifikasi, mengevaluasi, dan mengelola risiko terkait dengan ketersediaan layanan, integritas data, dan kepatuhan terhadap regulasi. Hasil penelitian ini menunjukkan proses domain EDM03 dan domain APO12 hanya memperoleh capability level 2 dan didapat nilai kesenjangan (GAP) masing-masing sebesar 1. Untuk dapat meningkatkan perolehan capability level, maka diusulkan rekomendasinya adalah menetapkan, memetakan, mengembangkan manajemen risiko dan mengadopsi teknologi informasi untuk mendukung manajemen risiko.
Utilization of Iles-Iles and Sorghum Starch for Bioethanol Production Kusmiyati, Kusmiyati; Sulistiyono, Agus
International Journal of Renewable Energy Development Vol 3, No 2 (2014): July 2014
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.3.2.83-89

Abstract

The aims of this study were to convert the starches from iles-iles tubers (Amorphophalus campanulatus) and sorghum grains (Sorghum bicolor L) into bioethanol as an alternative energy. Both of these agricultural products contains a high content starches and they do not use as the major foods in Indonesia. To find out the maximum ethanol concentration and yield, both the raw materials were converted to ethanol on various process variables including the concentration of flour substrate solution (100-300 g/L), β-amylase enzyme concentration (0.8 - 6.4 ml/kg of flour ), the  concentration of dry yeast S. cerevisiae (2-15 g), and fermentation time (72-168 hours). The results showed that at the flour substrate concentration of 250 g/L produced the maximum ethanol contents of 100.29 g/L and 95.11 g/L   for iles-iles and sorghum, respectively. Effect of β-amylase enzyme in the saccharification process showed that at concentration  of 3.2 ml/kg  the maximum reducing sugar content of 204.94 g/L and 193.15 g/L  for iles-iles and sorghum substrate, respectively were generated therefore it was corresponding to the maximum ethanol production. The concentration effect of dry yeast S. cerevisiae in the fermentation stage for the iles-iles and sorghum substrate revealed that the maximum ethanol obtained at 5 g yeast activated in 100 ml medium starter resulted the highest ethanol content 100.29 g/L 95.11 g/L for iles-iles and sorghum substrate, respectively. To determine the effect of fermentation time on ethanol yield from iles-iles and sorghum substrate, the fermentation process were performed at 3, 5, and 7 days. The maximum ethanol fermentation was obtained at 5 days fermentation. The ethanol yield is calculated by weight of ethanol is formed (g) divided by the weight of flour (g). Based on the experiment results, conducted, generally the highest ethanol yield of iles-iles was higher than that of sorghum flour. The highest yield (g/g) iles-iles and sorghum flour were 71.25 and 68.92 respectively
Co-Authors Kusmiyati Kusmiyati Kusrini Kusrini, K