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Alfian Qomaruddin
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rekayasa@trunojoyo.ac.id
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Universitas Trunojoyo Madura Jl. Raya Telang - Kamal, Bangkalan Kode Pos 69162
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INDONESIA
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 23 Documents
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Search results for , issue "Vol 15, No 2: Agustus 2022" : 23 Documents clear
Waktu Henti Antibotik Chloramphenicol Terhadap Perubahan Kadar Residu Pada Ikan Bandeng (Chanos Chanos) Didik Budiyanto; Sri Oetami Madyowati; Achmad Kusyairi
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.14135

Abstract

Milkfish is one of the fishery commodities that are in great demand by the Indonesian people, where the obstacle to production decline is disease. Therefore, to prevent disease and treat diseases that attack fish, farmers use the antibiotic Chloramphenicol. However, the use of high doses of antibiotics will cause resistance to pathogenic bacteria and the residue left in the fish's body will have a negative impact on human health who consume them such as allergies, toxicity and even cause death in anemia sufferers which can progress to leukemia. This study aims to determine the length of downtime of the antibiotic Chloramphenicol on changes in residual levels in milkfish (Chanos chanos) aged 30 days decreased to a safe limit for consumption. Residual content test using ELISA at 450 nm wave. Based on the results of the study, milkfish fed with a mixture of chloramphenicol antibiotics at a dose of 1 ppm resulted in the highest residual value of 4.6375 ppb in the first week and a decrease in residue to 0.2363 ppb for 5 weeks. The stopping time of chloramphenicol antibiotics on changes in residual levels in milkfish (Chanos chanos) aged 30 days in treatment F (Milkfish fed with a mixture of chloramphenicol at a dose of 1g/kg of feed for a week, then fed without a mixture of chloramphenicol for 5 weeks) resulted in a safe limit for consumption.
Karakter Kuantitatif Kandidat Melon Hibrida (Cucumis melo L.) Halimatus Sa'diyah; Suhartono Suhartono
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.15130

Abstract

Characterization is the first step in breeding to obtain information about a plant's character. This study aims to determine the character of the hybrid melon candidate. The research was carried out in the experimental garden of the Agrotechnology Study Program, Trunojoyo University, Madura, from September to December 2021. The research used a randomized block design with treatment using six hybrid melon candidates (G1, G2, G3, G4, G5, and G6) and two comparison varieties (Envy and Action 434) with three replications. The results showed that Candidate G2 had higher values of fruit diameter, flesh thickness, number of seeds, and fruit weight than the two comparison varieties. The highest sugar content value is found in candidate G4, which is 13.80%. Heritability values in the broad sense of quantitative characters ranged from 0.62-0.98, and there were correlations between characters (positive and negative) between the observed characters.
Pemanfaatan Analytical Hirarchy Process untuk Penentuan Karakteristik Combat Aircraft dalam Rangka Mendukung Industri Pertahanan Nasional Ahmad Afandi; Dwi Soedianto; Edy Iwan Bangun
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.14154

Abstract

The Indonesian Air Force is the main combat tool in the use of force to defend the sovereignty and territorial integrity of the Unitary State of the Republic of Indonesia as a unit in order to achieve guarantees for the safety of the nation and state. Indonesia only relies on 33 F-16 AM, BM, C and D aircraft, which are more than 30 years old. Then 16 Sukhoi 27 and 30 aircraft with almost 20 years of age as the main fighter aircraft. The limited number of aircraft spare parts as well as the limited types and number of guided missiles also caused the combat readiness of the F16 and Sukhoi 27 and 30 aircraft to be not optimal. The F5 Tiger fighter has fallen out of service in recent years and there has been no replacement to date. Likewise, the Hawk 100/200 aircraft which are more than 25 years old. the obligation of the Ministry of Defense to plan the purchase of fighter aircraft that will operate until 2030 and 2040. This research will use the Analytical Hierarchy Process (AHP) method to determine the choice of Combat Aircraft with predetermined criteria with the alternative choice of Dassault Rafale fighter aircraft from France, the Su 35 Russian-made and US-made F-15 EX aircraft. The highest data processing results are Dassault Rafale 63.7%, Su 35 20.3% and F-15 EX 16%. The result of the Multirole Combat Aircraft selection is that the Dassaut Rafale is selected. with an Inconsistency value of 0.04. This shows that the alternative calculation is still within the inconsistency threshold, which is less than 0.1. With the election of Dassault Rafale, it is hoped that the Transfer of Technology with PT. Indonesian Aerospace in order to increase the capability of the Domestic Defense Industry, especially the Air Force. later PT DI will be directly involved in the Maintenance, Repair, and Overhaul (MRO) process, including the preparation of the supporting infrastructure
Aplikasi Metode Regresi Untuk Analisis Variabel Moderasi pada Personel Organisasi Militer Adi Bandono; Sukmo Hadi Nugroho; Okol Sri Suharyo
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.15505

Abstract

The achievement of the vision, mission and also the target of a military institution is strongly influenced by soldiers or personnel who are human resource capital. In terms of human resources or personnel, of course, they have work motivation that must be maintained in order to survive in military organizations. Potential human resources and in accordance with their field of work will support the achievement of the organization if they are utilized optimally. This study aims to find answers about how the influence of organizational culture (X1) and job satisfaction (X2) on the work motivation of military personnel (Y) with work facilities as moderating variables (X3). The scientific method used in this research is survey research using a quantitative approach, the data analysis carried out in this study by analysis using statistical model tests. The results obtained in this study are (a) Organizational culture (X1) has a significant effect on work motivation (Y) in Institutions or Military Organizations, (b) Job satisfaction (X2) has a significant effect on work motivation (Y) in Institutions or Organizations. Military, and (c) Work facilities (X3) have a significant effect on work motivation (Y) in Military Institutions or Organizations. Based on the test results, it is also known that there is an effect of these variables after interacting with the work facilities variable as a moderating variable, the results obtained that have a significant effect on the work motivation of personnel. So it can be concluded that work facilities moderate organizational culture and job satisfaction so that it affects the increase in work motivation in military institutions or organizations.
Review Aktivitas Fotosintesis pada Tanaman Sorgum (Sorghum bicolor) dalam Kondisi Cekaman Kekeringan Mukhamad Su'udi; Arsetyo Rahardianto; Miatin Alvin Septianasari; Veren Yuliana Saputri; Dwi Setyati; Fuad Bahrul Ulum
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.9799

Abstract

Sorghum (Sorghum bicolor L. Moench) is a cereal crop that has the potential to be developed in Indonesia as a food, feed and industrial crop. Sorghum is a C4 plant that has the advantage of efficiency in hot and dry environments. Drought stress is one of the most limiting environmental factors for crop productivity worldwide, and can be caused by water deficits in the soil and in the atmosphere. On the decreasing leaf water status, the rate of CO2 assimilation and the conductance of stomata decreased rapidly. The CO2 concentration mechanism is able to saturate C4 photosynthesis under the relatively low intercellular CO2 concentration. In addition, CO2 photorespiration is likely to be repaired before it exits the bundle sheat cells. The effects of non-stomatal factors include reduced activity of photosynthetic enzymes, inhibition of nitrate assimilation, induction of premature aging, and changes in leaf anatomy. Photosynthesis in C4 plants, including sorghum, involves, others, the PEPC and Rubisco enzymes. Drought can also trigger oxidative stress, which is an environmental condition that has increased Reactive Oxygen Species (ROS) due to an over reduction of the photosynthesis process.
Pemilihan Multirole Maritime Patrol Aircraft Anti Kapal Selam dan Anti Kapal Permukaan Sebagai Benchmark Industri Pertahanan Udara Eko Yulianto; Tunggul Puliwarna; Jumino Jumino
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.14153

Abstract

The Indonesian Navy (TNI AL) is required to have a persistently broad Maritime Domain Awareness (MDA). In meeting its MDA demands, apart from using the KRI Radar, the Indonesian Navy needs to be supported by other airborne surveillance sensors and sensing satellites in outer space. For airborne sensors, Puspenerbal has been equipped with a fleet of maritime patrol aircraft  (MPA) based on Casa NC 212-200 MPA and CN 235-220 MPA. However, all of these MPAs have a low detection capacity (less than 100 Km) and are not equipped with weapons to respond to threats on the surface or under the sea. For this reason, it is necessary to carry out research on the Long Range MPA requirement to support the tasks of the Navy with the aim of providing information and input to the Leaders in making decisions related to the plan to procure weapons and the strategic policies of the Navy to enforce defense and maintain security in the marine area of national jurisdiction. Indonesia This research will use the Analytical Hierarchy Process (AHP) method to determine the choice of maritime reconnaissance aircraft with predetermined criteria with alternative options, namely P-8A Poseidon, SAAB 6000 MPA, Kawasaki P-1, and ATR 72 MPA. The selected alternative was based on a combination of 3 criteria, namely P-8A Poseidon 58.3%, SAAB 6000 MPA 20.4%, Kawasaki P-1 14.4%, and ATR 72 MPA 6.8%. the result of the selection of the Tactical Reconnaissance Maritime Patrol Aircraft is that the P-8A Poseidon is the right alternative to choose. with an Inconsistency value of 0.06. This shows that the calculation of the alternative is still within the inconsistency threshold, which cannot be more than 0.1.
Implementasi Inverter Berbasis Square Wave dan Sinusoidal PWM Menggunakan Arduino Uno R Dwiki Rachwanto; Saidah Saidah; Amirullah Amirullah
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.13454

Abstract

Inverters with square waves and sinusoidal output signal waves have different efficiency values. The difference is very visible, especially when the inverter is used to drive an electric device that uses a motor. In a sinusoidal wave type inverter, electricity consumption will be more efficient than the use of a square wave type inverter. This study aims to determine the efficiency value of the square wave and sinusoidal inverter wave output in supplying the load. Square wave and sinusoidal inverters require a controller, the controller uses an Arduino Uno which acts as an SPWM signal generator and a square wave signal is used to drive the MOSFET with push-pulls topology. Based on the results of the inverter test to determine the efficiency, it shows that the inverter with sinusoidal output is 96.40% better, while the inverter with square wave output is only 83.34%, this test is carried out using a 50W LED lamp load.
Pengaruh Tinggi Puncak Struktur Hexagonal Artificial Reef Terhadap Kemampuan Redamanan Gelombang Muhammad Baharudin Fahmi; Haryo Dwito Armono; Muhammad Zikra; Harish Wirayuhanto
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.14848

Abstract

Generally, the purpose of artificial reefs is to rebuild naturally occurring coral reefs that have been destroyed. Without sacrificing the attractiveness of the protected beach, these manmade reefs functioned as new habitats for marine life and protected coasts by reducing wave energy. on the other side man-made artificial reefs can perform as submerged breakwaters, their ability to dampen incoming waves must be investigated. In this paper, the researchers present a new shape in the form of a hexagonal artificial reef. The wave attenuation performance index is calculated using the wave attenuation performance rating. The research focuses on the effect of structural height (h/d) on transmission wave value using a physical testing method on a scale of 1:10 at the wave flume of the Department of Marine Engineering, Sepuluh Nopember Institute of Technology, Surabaya. The test results indicate that the smallest transmission coefficient (KT) was produced on artificial reefs Configuration A-3 with the greatest submerged depth (h/d=0.75). The parameter results indicate that the greater the wave steepness (H/gT2) and the significantly larger the immersion depth (h/d), the better the wave reduction.
Analisis Tekno-Ekonomi Produksi Pupuk Cair Ramah Lingkungan dari Limbah Air Budidaya Ikan Berbasis Masyarakat Nizar Amir; Hakam Muzakki; Hoomzah Nur Alisiyah; Raden Apriyanto
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.15494

Abstract

There are two important aspects of the implementation of this research, namely the technical aspect, which includes the production and analysis of the quality of liquid fertilizer products from fish farming wastewater, and the economic aspect, which includes an economic analysis on an industrial scale. Liquid fertilizer is made from fish farming wastewater obtained from Bangkalan Regency, East Java Province, Indonesia. The process of producing liquid fertilizer from fish farming wastewater includes various processes, from mixing to fermentation. The physical characteristics of liquid fertilizer from fish farming wastewater are in accordance with existing standards. Without the addition of nutrients, liquid fertilizer from fish farming wastewater has nitrogen (N) 1.33%, phosphorus (P) 0.44%, and potassium (K) 0.38%. Although the nutrient content of liquid fertilizer from fish farming wastewater is still below the standard of SNI 02-4958-2006, in industrial-scale production processes, adding nutrients is very necessary. In the economic analysis, all economic parameters are declared feasible and profitable, with an NPV value of Rp. 5,524,899,840, IRR 31,79%, PP 3.15 years and B/C ratio 3.1. This study shows a positive value on the technical and economic aspects. Finally, this research can be used as a reference by academics, government, and entrepreneurs in the technical and economic aspects of producing liquid fertilizer from fish farming wastewater.
Uji Toksisitas Ekstrak Daun Sirih (Piper betle) Terhadap Benih Ikan Kakap Putih (Lates calcarifer) Leni Mardiana; Nunik Cokrowati; Alis Mukhlis
Rekayasa Vol 15, No 2: Agustus 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i2.10137

Abstract

White snapper (Lates calcarifer) is a type of seawater fish that is in great demand by the public. This study aims to determine the 48-hour LC50 value and the effect of using betel leaf extract on the health status of white snapper. This research was conducted in July 2020 which took place at the Sekotong Coastal Aquaculture Development Center (BPBPP), West Lombok Regency, West Nusa Tenggara. This research was conducted using experimental methods. This study used 5 treatments and three replications, to obtain 15 experimental units with doses of 0 ppm, 80 ppm, 90 ppm, 100 ppm and 200 ppm. Data analysis was performed using a linear regression test, namely probit analysis by testing the mortality of tested animals and calculated through statistical data using Microsoft Excel. The higher the betel leaf extract concentration, the higher the number of white snapper seed deaths. This happens because the betel leaf extract contains active antimicrobial compounds, but at high concentrations, it can poison the white snapper seeds. For further research, it is recommended to test the toxicity of betel leaf extract on the mortality of white snapper with variations in water quality. 

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