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Alfian Qomaruddin
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REKAYASA
Published by Universitas Trunojoyo Madura
ISSN : 02169495     EISSN : 25025325     DOI : https://doi.org/10.21107/rekayasa
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Computer Science & IT Electrical & Electronics Engineering Engineering Physics
This journal encompasses original research articles, review articles, and short communications, including: Science and Technology, In the the next year publication, Rekayasa will publish in two times issues: April and Oktober.
Arjuna Subject : -
Articles 15 Documents
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Search results for , issue "Vol 16, No 1: April 2023" : 15 Documents clear
Pembelajaran Mendalam Pengklasifikasi Ekspresi Wajah Manusia dengan Model Arsitektur Xception pada Metode Convolutional Neural Network Purnawarman Musa; Wahid Khairul Anam; Saiful Bahri Musa; Witari Aryunani; Remi Senjaya; Puji Sularsih
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.16974

Abstract

Deep learning is a neural network that creates innovations that give computer-implanted problem-solving expertise. One of the principles of computer vision is a detection system with a vision framework that can identify things encountered in the same manner as a human vision system. Using an artificial intelligence-based Convolutional Neural Network (CNN) model with deep learning techniques, we present a face emotion identification system. The categorization of facial expressions will be utilized as the basis for a face recognition system trained using CNN. The applications are intended to use the OpenCV, Keras, and TensorFlow libraries as the backend. We were discussing the study on the best use of xception architectural models in facial expression recognition systems. Based on the results of these tests, the study obtained an increased accuracy value in training and data testing on an xception architecture model trained for facial expressions using the FER-2013 dataset, resulting in an accuracy value of 66% as well as the value of each average for precision (76%), recall (65%), and F1 score (63%).
Spatio-Temporal Annual Changes of Mangrove Vegetation Coverages in Porong Estuary Based on Sentinel-2 Imagery Herlambang Aulia Rachman; Abd Rahman As-Syakur
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.18882

Abstract

Mangrove is a typical coastal ecosystem with high productivity and has a number of ecosystem services. However this ecosystem is vulnerable particularly in urban areas due to land use change and illegal logging. Sidoarjo is one of the most developed urban area in the East Java Province, with mangrove ecpsystem scattered along the Porong estuary. This estuary is also the location of mudflow from the famous Lapindo mud disaster since 2006. This study aims to analyze the changes of mangrove coverages around the Porong estuary using satellite imagery data. Fractional Vegetation Coverage (Fv) was used to quantify the changes of mangrove vegetation coverage of Mangrove Forest from 2015 – 2021. The results show that there is a change in mangrove coverages in the area of study. The high change from lo vegetation coverage (LVC) to Full Vegetation Covarege (FCV) as found in the mouth of Porong River. This condition maybe caused by sedimentation process due to mudflow from volcanic disasters. 
Pengaruh Manipulasi Ploidi Terhadap Efektivitas Pertumbuhan dan Hasil Tanaman Labu Kuning (Cucurbita moschene Dutchene) Reza Prakoso Dwi Julianto; I Made Indra Agastya; Wahyu Fikrinda
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.11895

Abstract

Pumpkin (Cucurbita moschene Duthene) is plant sources of food that has high nutrition content. Increasing the productivity of pumpkin can be done through programs, which is the ploidy manipulation technique, the technique using a mutagen, namely colchicine. Application of colchicine in the wrong dose and soaking time can be toxic to plants. The research aim to gain recommendations for the right concentration of colchicine immersion to increase the growth and yield of pumpkin plants. Research was done by using a split plot design with subplots with colchicine concentration and the main plots of local Malang pumpkin varieties. The research results that application of colchicine immersion in several local pumpkin varieties showed a significant relationship at fruit quantity parameter. Application of colchicine with 3 dose ppm on local pumpkin variety Malang 1 (P3V1) showed the highest average fruit quantity compared to other treatments, which was 4 pieces. Optimal concentration of colchicine to increase the yield of local pumpkin plants is with 3 dose ppm can be seen from the highest average value on several parameters among others fruit number, fruit weight, and fruit diameter, but not significantly different from the colchicine concentration of 2 ppm and 4 ppm. The colchicine concentration of 2 ppm showed the highest average value of the sex ratio parameter was 25.51%.
Pemodelan Pola Transport Sedimen di Perairan Desa Berakit dan Pengudang Kabupaten Bintan Rahma Sarita; Mario Putra Suhana; Harish Wirayuhanto
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.18386

Abstract

Sedimentation and erosion processes can be influenced by hydro-oceanographic factors. These factors include waves, currents, and tides because they interact directly with the coastal/coastal area. Related to these problems, sedimentation and erosion is one thing that needs to be studied. One way that is used in providing information about these that is widely used is to use a hydrodynamic model. Based on this, it can be seen that it is important to conduct research to determine sediment properties such as the type and type of sediment with sediment transportt modeling in Berakit and Pengudang villages. This research was carried out using the MIKE21 Software hydrodynamic modeling for one month in June 2021 using hydrodynamic modeling, the Flow Model FM Sand Transportt module. Sediment transportt observed is bottom sediment or bed load. The research results are shown in 4 conditions, namely towards high tide, highest tide, towards low tide and lowest tide. Sediment transportt at high tide with erosion of -0.10 and sedimentation of 0.25 m/day and at the highest tide shows an erosion value of -0.24 and sedimentation of 0.32 m/day. Sediment transportt towards low tide with erosion of -0.15 and sedimentation of 0.20 m/day and at the lowest ebb erosion occurs with a value of -0.36 and sedimentation of 0.20 m/day.
Optimalisasi Penggunaan Energi Terbarukan untuk Desa Mandiri Energi dan Ramah Lingkungan Nizar Amir; Makhfud Efendy; Sabarudin Akhmad; Fiki Milatul Wahyu; Rafly Firman Surya Putra
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.19119

Abstract

The residents of West Waru Village, Pamekasan, are renowned for their high numbers of cows, leading to a steadily increasing amount of cow dung that contaminates the environment. To combat this problem, we must find ways to utilize cow manure. There is a potential solution in the form of biogas generator technology, which can convert cow manure into energy. This research seeks to develop and optimize its design in order to provide renewable electricity for Waru Barat Village, Pamekasan. It involves the use of HOMER software to simulate and determine the optimal design. Technical, economic and environmental indicators are used as the main parameters in this research's output. The cost per kWh of generated energy stands at Rp. 1,076/kWh - a far cheaper alternative than electricity from PLN (Rp. 1,500/kWh) - making it highly beneficial for all stakeholders when constructing renewable energy power plants in rural Indonesia.
Rancang Bangun Sistem Monitoring Arus, Tegangan, Kecepatan Putar Turbin dan Suhu Berbasis IoT Pada Pembangkit Listrik Tenaga Uap Mini Skala Laboratorium Muhammad Ibrahim Alfitroh; Humaidillah Kurniadi Wardana
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.16580

Abstract

The PLTU monitoring system developed in this study will be in the form of a monitoring system for temperature, current, voltage, turbine speed on a laboratory scale mini PLTU created using the blynk application and displayed on a smartphone. The research method used is in the form of testing a monitoring system comparing the prototype with standard gauges to determine the percentage of the measurement error, readings of type K and MAX6675 thermocouples, Lm393 sensors, DC voltage sensors, ACS712 sensors. The results of the measurement of the steam temperature sensor have an average percentage error of 0.03%, the turbine rotation sensor has an average percentage error rate of 0.01%, DC voltage sensor has an average error percentage rate of 0.07%, DC current sensors have an average percentage error rate of 0.10%.
Spatial-Temporal Variation of Land Use Changes In Ambon City Mohammad Amin Lasaiba
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.18799

Abstract

Changes in land use have caused various spatial consequences that occur substantially in an area. This study examines the pattern of land use changes from different room variations. The research was at a location in Ambon City. The materials in this study are Landsat 8 OLI/TIRS in 2010 and 2020, DEM SRTM, administrative maps, and development center maps. Research data were analyzed descriptively analytical, spatial, and temporal from the overlay results. The study results in show changes over ten years (2010-2020), indicating an increase in settlements covering an area of 23,810 ha per year. Differences in spatial variations based on administrative site, additional blocks in Sirimau District covering an area of 76,880 ha, and withdrawal of the most significant land in mixed gardens surrounding an area of 58,859 ha. In addition, there was additional weaponry on steep slopes (15 -30%) covering an area of 38,503 ha and a protected area of 16,505 ha by converting the use of forest land covering an area of 17,366 ha, and most of it took place in the city center. The addition of settlements also occurred in an accessibility (less than 3 km) area of 116,370 ha, most scattered in the secondary center of 86,520 ha.
Pengaruh Penambahan Chemical Agent Terhadap Angka Gula Reduksi Nira Perahan Pertama (NPP) Siska Nuri Fadilah; Reswara Musyafa; Lutfi Nanda Putri; Dirgantara Syahril; Achri Isnan Khamil; Maktum Muharja
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.17200

Abstract

One of the critical problems in the sugar industry is the high number of reducing sugars due to the inversion of sucrose in sugarcane due to the presence of Leuconostoc sp. This study aims to determine the effect and the optimum conditions for adding chemical agents to the number of reducing sugars in the first milking juice (NPP). The chemical agents used were benzalkonium chloride, sodium metabisulfite, and calcium hypochlorite with variations of 1, 2, 3, and 4 g/L. Analysis of reducing sugar (%GR) using the Lane-Eynon test method. The results showed that the addition of chemical agents had an effect on decreasing %GR of NPP, but at low doses there was an increase in %GR. The optimum point was reached when the addition of 3g/L benzalkonium chloride + sodium metabisulfite (BKC+SMB) was able to reduce %GR up to 2.16%. This condition has the potential to provide a net profit of sugar production of ±Rp. 14,056,000.00 per day. The use of BKC+SMB is a solution to reduce the number of reducing sugars and increase the yield value of the sugar industry.
Studi Pemanfaataan Teknologi Hydrogen Fuel Cells (HFCs) pada Kapal Peti Kemas Muhammad Dihan Ramadhan Pradana; Setyo Nugroho; Eka Ardhi
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.16269

Abstract

International Maritime Organization has previously issued an ambitious strategy to decrease maritime carbon emission by by 70% in 2050. There are lots of alternatives in reducing carbon emission, with hydrogen fuel cells being one considered. Hydrogen fuel cells (HFCs) is projected to decrease maritime carbon emission up to 80% and has larger engine efficiency, roughly 10-20% higher than of diesel engine. In this research, feasibility analysis of HFCs was conducted through life cycle analysis and simple additive weighting by considering 4 types of fuel (green/blue/gray hydrogen and LNG) and 3 types of HFCs (PEMFC, MCFC and SOFC). Life cycle analysis showed that combination of Solid Oxide Fuel Cells and blue hydrogen came out as the best solution to reduce carbon emission up to 82% for hybrid-powered vessels. From financial perspective however, hybrid-engine option may reduce overall gross income by 27% since it requires higher engine space. Furthermore, utilization of fuel cell resulted in a lower net present value as a result of higher investment cost compared to diesel-powered vessels.
Bakteri Bacillus Sebagai Agen Kontrol Hayati dan Biostimulan Tanaman Arkan Setiaji; Raden Roro Rifka Annisa; Deris Trian Rahmandhias
Rekayasa Vol 16, No 1: April 2023
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v16i1.17207

Abstract

One of the long-term constraints in agricultural productivity is the dependence of farmers on synthetic pesticides. The application of pesticides has a negative impact on ecosystems and human health. Utilization of microorganisms such as bacteria Bacillus as a biological control agent is an alternative to reduce the use of synthetic pesticides. A simpler discussion of the interaction between Bacillus and plants is important to carry out. This article aims to review the mechanism of the role of Bacillus as a biological control agent and growth stimulant in plants. Bacillus is a genus of bacteria that can be used as biological control agents because it is adaptive, capable of forming endospores and tolerant of various environmental conditions. These properties are advantageous in competition with phytopathogens through an antibiosis mechanism in the form of toxin production. Bacillus infection of plants is able to stimulate the emergence of systemic resistance as an initial defense mechanism in plants. Bacillus associated with plants can provide a growth stimulation effect because the metabolites produced are able to trigger the sensitivity of the root system for nutrient absorption and stimulate the regulation of growth regulators such as the synthesis of auxin, gibberellins, and cytokinins. Based on these reviews, the use of based biological agents and biostimulants Bacillus is expected to be able to support global efforts to achieve sustainable development targets, especially in the agricultural sector

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