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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 504 Documents
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Efektifitas Transportasi dan Lokasi Terhadap Distribusi Logistik di Wilayah Komando Armada I TNI-AL Kartikasari, Wahyu; Setiawan, Daniel; Fauziah, Erna
Rekayasa Vol 14, No 2: Agustus 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i2.10968

Abstract

The delays and constraints that distribution centers have in supplying logistics that are often faced are related to transportation and transportation facilities that are not optimal, as well as the location of distribution centers to the remote Koarmada I area. In this study, an analysis of the effectiveness of the implementation of logistics distribution by a logistics distribution agency was carried out and the influence of the implementation of logistics distribution on supply performance to support the Koarmada I Marine Combat Operations. From the measurement model obtained using SEM-AMOS software on the three variables of Location, Transportation and Inventory that builds Logistic Distribution, Location variable has a high value of 0.566. This means that the effectiveness of the implementation of logistics distribution in distributing logistics supplies from the distribution center to Koarmada I is not effective. So that in order to answer the existing problems, the Indonesian Navy needs to plan the formation of a logistics supply distribution organization through organizational validation, building reserve locations that are in strategic positions, building infrastructure and managing logistics supplies in a comprehensive and integrated manner.
Analisis Dampak Kawasan Sentra Budidaya Lele Terpadu (KSBLT) Kabupaten Tuban di Kecamatan Merakurak Terhadap Usaha Budidaya Lele di Kecamatan Tuban Kurniawan, Andi; Pramudia, Zulkisam; Amin, Abdul Aziz; Nurjannah, Nurjannah; Hidayat, Wahyu; Kurniati, Evi; Lusiana, Evellin Dewi; Ardian, Gatot; Amenan, M
Rekayasa Vol 14, No 2: Agustus 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i2.11859

Abstract

As one of the efforts to increase production of catfish culture, the Government of Tuban Regency launched the establishment of The Integrated Catfish Cultivation Center Area (ICACA) in Merakurak Sub-District in 2018. The existence of ICACA makes the program to increase catfish aquaculture more coordinated and increase production of catfish cultivation in Tuban Regency. ICCCA not only has an impact on the aquaculture business in Merakurak District, but also in other sub-districts in Tuban Regency. However, studies that explore the impact of ICACA on aquaculture in other areas are rarely reported. This study analyzes the impact of the existence of ICACA on cultivation business in Tuban District in Tuban Regency. This study uses a descriptive method with a mixed method approach (qualitative and quantitative). The results of this study indicate the factors that are the impact of ICACA in Merakurak District on the development of catfish cultivation in Tuban District. Based on the analysis carried out in this study, the implementation of ICACA in Tuban Regency, especially related to the effect of ICACA on catfish cultivation in Tuban District, needs to be directed to the application of sustainable aquaculture based on the empowerment of local community groups.
Kinerja Pendekatan Convolutional Neural Network dan Dense Network dalam Klasifikasi Citra Malaria Dafid, Achmad; Siwindarto, Ponco; Siswojo, Bambang
Rekayasa Vol 14, No 2: Agustus 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i2.10735

Abstract

Indonesia is an archipelago, which three of its five main island consists mainly, or dense tropical rainforest. This rainforest is main breeding ground for malaria disease that mostly affect regions near said forest. In an effort to treat malaria disease, a diagnostic process is performed to correctly identify the disease. Several image pattern recognition technique been developed and have potential to be utilized as malaria diagnostic tool. In this research, a method is described on designing neural network to detect a blood cell parasitized by malaria. The method consists of utilizing a dense network, and a convolutional neural network, to be trained using publicly available training dataset. Both models’ performance is then compared and analyzed. Before the data is used, a process of padding is performed to resize the input image into 200 x 200 pixels. The resized input data is then used to train both models. From the training and testing, it is found that the dense network achiever 64.78% accuracy. On the other hand, model based on convolutional neural network achiever 94.32%. From analysis, it is found that the size of the model being used is not big enough to achieve better performance. Hence, it is suggested for future research to increase the model size in terms of network width and depth. 
Tingkat Difusi Oksigen Selama Periode Blind Feeding Budidaya Intensif Udang Vaname (Litopenaeus vannamei) Ariadi, Heri; Wafi, Abdul; Supriatna, Supriatna; Musa, Muhammad
Rekayasa Vol 14, No 2: Agustus 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i2.10737

Abstract

The diffusion process is a limiting factor that key plays for the oxygen transfer mechanism in the pond water column. The purpose of this study was to determine of oxygen diffusion rate during the blind feeding period of intensive shrimp culture of vaname (L. vannamei). This research was conducted for 30 days blind feeding period of intensive vaname shrimp culture, the research using concept of ex-pose facto causal design. Furthermore, the oxygen diffusion rate is calculated mathematically and a regression test is carried out on the associated water quality parameters. During the blind feeding period, the oxygen diffusion rate fluctuates and dynamically, with a diffusion rate ranging from 0.015-0.028 mgO2/L/hour. This condition is followed by a stabilizing and optimum condition of pond water quality parameter values throughout in the aquaculture. Diurnal periodically, the oxygen diffusion mechanism has an influence on the level of oxygen solubility in ponds. This relationship is modeled by the equation Y = 0.006 + 0.002x. This means that for each diffusion transfer increase of 1 mgO2/L/hour, there will be an oxygen increase in the ponds of 0.002 mg/L. The conclusion of this study is that the oxygen diffusion rate during the blind feeding period of intensive vaname shrimp culture obtained an average at 0.020 mgO2/L/hour, ranging from 0.018-0.023 mgO2/L/hour for 30 days of culture. From the results of this study, it is hoped that research can be developed study regarding of mechanisms, dynamics, and the effect of oxygen diffusion on the intensive shrimp farming ecology.
The Effect of Curing Pressure and Duration on Mechanical Strength of Ultrahigh Molecular Weight Polyethylene/High-Density Polyethylene Composite as An Alternative Material for Windmill Turbine Febrianti Nurul Hidayah; Johan Boss
Rekayasa Vol 13, No 3: December 2020
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v13i3.8703

Abstract

The use of steel in building or construction manufacture continues to decrease, owing in part to the sustainability and mechanical properties of fibers which have higher strength in minimum weight than steel. This preliminary study was defined to evaluate the mechanical properties of high-performance fibers, especially ultrahigh molecular weight polyethylene (UHMWPE), in terms of the composite to be the main material of windmill turbines. It was UHMWPE as reinforcement and high-density polyethylene (HDPE) as a matrix in this composite system. The composites were processed in a variety of pressure and duration (50 to 165 bar and 10 minutes to 48 hours). The mechanical strength was tested by 3-point bending tests to measure the interlaminar shear strength, shear modulus, and bending strength. The result showed a significant difference in properties of the composite which is higher pressure and longer duration obtained a higher value of mechanical strength.
Rekayasa Digitalisasi Pertanian Hidroponik NFT dengan Model Kendali Suhu, pH dan Electrical Conductivity (EC) Wahyuni, Sri; Wahyudi, Mujib; Rusidy, Amin
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.9217

Abstract

Madura, which is nicknamed the island of salt, began to develop hydroponics, especially for the fulfillment of vegetables. So far, hydroponic practitioners have always checked the nutrients on their hydroponic plants twice every day to ensure that the plant's nutritional needs are met, besides that the temperature and pH of the water must also be maintained according to plant needs so that plants can grow and develop properly as expected. Controlling the temperature and pH of the water as well as the nutritional needs that are carried out routinely every day by manual method on hydroponic growing media is considered a hassle. Not everyone understands the technical details of care for the ideal conditions of plants that must be maintained, especially for hydroponic beginners. It is necessary to digitize agriculture, through controlling the plant media automatically based on temperature settings, the measurement of nutritional needs and the pH adjusting the types of vegetables planted. Temperature conditions are monitored using a DS18B20 waterproof sensor with a thermoelectric cooler as a temperature stabilizer actuator in ideal conditions. Meanwhile, the nutritional requirements are calculated based on the type of plant, the reading of potential hydrogen (pH) levels by the pH sensor and the electrical conductivity (EC) value by the EC and TDS sensors are continuously responded by the peristaltic pump to determine the amount of solution and ideal nutritional requirements for plant. The control method (PID) which is implemented in active / non-peristaltic pump activities to control temperature, pH of the solution and nutritional needs based on the EC value of the solution is more precise and only a few times an error with an error value ranging from 1 - 2 ml.
Karakteristik Kondisi Mangrove di Desa Taddan Kabupaten Sampang Firman Farid Muhsoni
Rekayasa Vol 13, No 3: December 2020
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v13i3.9146

Abstract

Mangroves are intertidal plants found along tropical and non-tropical coastlines which  is flooded by tides in brackish areas. Mangroves ecosystems  have experienced a very large decrease in area especially in Madura region. This research was conducted in Taddan Village, Camplong District, Sampang. The objectives of this research were to identify mangrove vegetation, mangrove area and mangrove characteristics. The area of mangroves in the research location was 48 ha. There were 7 types of mangroves found, e.g Rhizophora apiculata, Rhizophora stylosa, Rhizophora mucronata, Sonneratia alba, Sonneratia caseolaris, Avicennia marina and Avicennia alba. The type of substrate in the mangrove research location was mainly mud. The distribution pattern of mangroves at the research location tends to spread in groups, with a low level of mangrove diversity. The uniformity index value is balanced, or in other words, there are individuals who dominate. The average sediment depth is 24.7 cm, the average salinity is 36.7 ppt, the average water pH is 5.3, the average DO is 5.9 mg / l, the average water temperature is 31, 70C, the average soil pH is 6.4. Further analysis concluded that  environmental parameters in the area was  unsuitable for marine tourism.
Pengaruh Konfigurasi Terumbu Buatan Bentuk Heksagonal pada Kemampuan Peredaman Gelombang Wirayuhanto, Harish; Armono, Haryo Dwito
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.10042

Abstract

An artificial reef is a structure that is placed underwater and functions as a natural coral reef. Apart from being an artificial reef, the function of artificial reefs is also as a submerged breakwater. As a breakwater, it is necessary to know the level of effectiveness in reducing waves and the impact of scouring arising from the laying of artificial reef structures. This research was conducted to determine the correlation between the ability of wave attenuation to the depth of scouring due to variations in laying (structure gap distance) and variations in waves on artificial reefs in hexagonal shape with a scale model of 1:10. From the results of research conducted at the Marine Energy Laboratory of the Department of Marine Engineering, FTK ITS obtained, for laying structures with a gap of 1D, they have better wave attenuation capabilities with a small maximum scouring depth, namely with a Kt value of 0.844 and a scouring depth of 3 cm. For the laying of the structure with a distance of 0D, it has a greater value of transmission coefficient (Kt), which is 0.911 with a greater value of the maximum scouring depth, which is 3.5 cm.
Pengaruh Perawatan Air Laut dan Air Tawar terhadap Kuat Tekan Beton Geopolymer yang Memadat Sendiri Nurtanto, Dwi; Rahayu, Adelia Adyb; Wahyuningtyas, Winda Tri
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.8375

Abstract

The replacement of 10% cement as pozzolan material with cementitious materials such as fly ash and rice husk ash aims to improve the quality and durability of concrete to aggressive environments, under normal environmental conditions fly ash and rice husk ash are able to improve the quality of concrete. Based on the review was conducted research on the influence of curing sea water and fresh water to strong press self-compacting concrete with fly ash and rice husk ash as a substitute for cement. Cylindrical test objects measuring 10 x 20 cm with strong concrete press testing at the age of 28 and 56 days to determine the durability of concrete to aggressive environments. The process of curing sea water affects the compressive strength as well as the durability of concrete at the age of 28 and 56 days. The highest average compressive strength increases by 19-24% from normal concrete.
Analisis Kekuatan Rangka Pada Mesin Transverse Ducting Flange (TDF) Menggunakan Software Solidworks Eko Prasetyo; Rudi Hermawan; Muhammad Naufal Ibnu Ridho; Istihara Ibnu Hajar; Hasan Hariri; Erlanda Augupta Pane
Rekayasa Vol 13, No 3: December 2020
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v13i3.8872

Abstract

In the industrial world, companies are required to be more effective and creative with the development of today's technology. Transverse ducting flange (TDF) machine is a machine that functions to make ducting flange products and form ducting connections, where there are several components in large quantities, so the design of the frame construction made must be strong to support these components. Responding to the cases that occurred, with the aims and objectives of this study, namely to determine the level of efficiency in the use of the design on a hollow galvanized steel frame measuring (100 × 50 × 3,2) mm, by performing simulations using SolidWorks Premium 2019 software with static analysis features. using the finite element method. So with this research, we can find out whether the frame is receiving loads that exceed the yield strength limit or vice versa. The results of the research are three load-bearing areas received, with load values in a row, namely 11693,809 N, 266 N, and 598,206 N. From the results of the three, it shows that the design of the frame construction that has been made is safe to use, because the calculation of the analysis meets the value requirements safety factor and the maximum stress simulation that occurs does not exceed the yield strength limit of the frame material.

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