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<![CDATA[Rekayasa Digitalisasi Pertanian Hidroponik NFT dengan Model Kendali Suhu, pH dan Electrical Conductivity (EC) ]]>
<![CDATA[Wahyuni, Sri]]>;
<![CDATA[Wahyudi, Mujib]]>;
<![CDATA[Rusidy, Amin]]>
<![CDATA[ Rekayasa Vol 14, No 1: April 2021 ]]>
Publisher : <![CDATA[Universitas Trunojoyo Madura ]]>
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DOI: 10.21107/rekayasa.v14i1.9217
<![CDATA[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.]]>
<![CDATA[Pengaruh Konfigurasi Terumbu Buatan Bentuk Heksagonal pada Kemampuan Peredaman Gelombang ]]>
<![CDATA[Wirayuhanto, Harish]]>;
<![CDATA[Armono, Haryo Dwito]]>
<![CDATA[ Rekayasa Vol 14, No 1: April 2021 ]]>
Publisher : <![CDATA[Universitas Trunojoyo Madura ]]>
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DOI: 10.21107/rekayasa.v14i1.10042
<![CDATA[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.]]>
<![CDATA[Pengaruh Perawatan Air Laut dan Air Tawar terhadap Kuat Tekan Beton Geopolymer yang Memadat Sendiri ]]>
<![CDATA[Nurtanto, Dwi]]>;
<![CDATA[Rahayu, Adelia Adyb]]>;
<![CDATA[Wahyuningtyas, Winda Tri]]>
<![CDATA[ Rekayasa Vol 14, No 1: April 2021 ]]>
Publisher : <![CDATA[Universitas Trunojoyo Madura ]]>
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DOI: 10.21107/rekayasa.v14i1.8375
<![CDATA[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.]]>
<![CDATA[Identifikasi Acute Lymphoblastic Leukemia pada Citra Mikroskopis Menggunakan Algoritma Naïve Bayes ]]>
<![CDATA[Syidada, Shofiya]]>;
<![CDATA[Hariyanto, Bagus]]>
<![CDATA[ Rekayasa Vol 14, No 1: April 2021 ]]>
Publisher : <![CDATA[Universitas Trunojoyo Madura ]]>
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DOI: 10.21107/rekayasa.v14i1.9110
<![CDATA[Leukemia is a type of blood cancer that occurs when the body overproduces abnormal white blood cells. Acute Lymphoblastic Leukemia (ALL) is a type of acute leukemia. ALL occurs when the spinal cord is excessively producing young lymphocytes, known as lymphoblasts. Leukemia is difficult to detect because it has the same symptoms as other diseases. One way to detect leukemia is to use a complete blood count test. Blood count test is done by calculating the population of red blood cells, white blood cells and platelets. The health condition of the body is indicated by the number of each blood cell. The small number of erythrocyte and abnormal cell shape is indicative of leukemia. How to identify leukemia still using a microscope. In this study the researchers made a way of identifying acute lymphoblastic leukemia cells by image processing, include cropping, segmentation, feature extraction and identification. The method used in image identification is Naïve Bayes Classifier (NBC). NBC is a classification method which applies simple probability calculations using Bayes theorem. The white blood cell image tested using this application will be evaluated with accurations. The greatest accuracy results from several test scenarios obtained 80% accuracy.]]>
<![CDATA[Analisis Performa Mata Uang Virtual (Cryptocurrency) Menggunakan Preference Ranking Organization Method For Enrichment Evaluation (Promethee) ]]>
<![CDATA[Farida, Yuniar]]>;
<![CDATA[Khasanah, Zhara Shafira Uswatun]]>
<![CDATA[ Rekayasa Vol 14, No 1: April 2021 ]]>
Publisher : <![CDATA[Universitas Trunojoyo Madura ]]>
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DOI: 10.21107/rekayasa.v14i1.8793
<![CDATA[Cryptocurrencies are among the inventions that have caused a stir in the economy of late. Because in its use there are still pros and cons of various countries. Some countries reject the use of cryptocurrencies and others support the use of cryptocurrencies because it is considered a modernization of payment tools. Besides being used for payment instruments, cryptocurrencies can also be one of the options to invest. The number of cryptocurrencies that exist causes investors to be observant in making the right choices. In this study, the Promethee method was used I and II to determine the rank of 7 virtual currencies. Promethee I is a partial assessment method while Promethee II is a complete assessment method. The data used for ranking is obtained from the questionnaire "sentiment on the performance of cryptocurrencies". The results of the cryptocurrency performance analysis showed that the investment commodity of the most recommended in a row is Bitcoin with a net flow value of 0.33267, Cardano 0.14267, Ethereum 0.04800, Ripple 0.04733, Stellar -0.04733, Litecoin -0.04767 and Dogecoin -0.47567.]]>
<![CDATA[Rancang Bangun dan Uji Kinerja Mesin Bead Roller untuk Perbaikan Bodi Kendaraan ]]>
<![CDATA[Wisnujati, Andika]]>;
<![CDATA[Yusuf, Mirza]]>
<![CDATA[ Rekayasa Vol 14, No 1: April 2021 ]]>
Publisher : <![CDATA[Universitas Trunojoyo Madura ]]>
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DOI: 10.21107/rekayasa.v14i1.10092
<![CDATA[In developing the 4.0 industrial revolution era, vehicle body repair manufacturing companies are required to carry out technological innovations to support effective and efficient performance. One way is in the metal forming process, namely by changing the metal's shape into a variety of products by the company to increase the selling value of the material. The method of forming metal or these materials uses a bead roller machine with a compressive force to carry out the forming process on sheet metal plates according to the size of the tools' geometry and shape. The design of this bead roller machine is operated by using an electric motor with a power of 0.5 HP, using an Alternating Current (AC) voltage, the thickness of the iron frame dimensions of 1.2 cm, and using a reducer with a ratio of 1: 100. Selection of engine parts such as shafts, bearings, tools, and sprockets using materials that are economical and easy to obtain. The design uses Autocad 2014 Software, starting with designing a bead roller machine design paying attention to the strength of the materials used, then assembling the components and the machine's electrical system. The result of this design will be displayed by performing the bead roller machine performance. This bead roller can increase work productivity efficiently and effectively concerning sheet metal media for vehicle body repair compared to manual roll bending tools.]]>
<![CDATA[The Effect of Sunglint Correction for Estimating Water Depth Using Rationing, Thresholding, and Mean Value Algorithms ]]>
<![CDATA[Prayogo, Luhur Moekti]]>;
<![CDATA[Basith, Abdul]]>
<![CDATA[ Rekayasa Vol 14, No 1: April 2021 ]]>
Publisher : <![CDATA[Universitas Trunojoyo Madura ]]>
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DOI: 10.21107/rekayasa.v14i1.8698
<![CDATA[Satellite-Derived Bathymetry (SDB) is an alternative for obtaining shallow water depth data. The existence of images with various resolutions, the availability of a complete image band can develop the extraction results. This method is based on the principle of the satellite's visible band to estimate water depth. The mapping of shallow water depth is dependent on water conditions, both its brightness and surface. When the sensor senses a water object, the reflected reflection comes from the surface, and some sensors cannot penetrate the water object. The sun's position and the sensor's point of view when sensing it results in interference from the water surface (Sunglint). The sunglint effect on the image can be reduced by performing RGB band correction with NIR Infrared. This study aims to demonstrate the effect of Sunglint's correction on three SDB approaches, namely Thresholding, Rationing, and Mean Value on Worldview 3 imagery in Karimunjawa Islands, Central Java. This study's results indicate that the Sunglint correction on Worldview 3 imagery affects the depth extraction results. The best results are shown by Sunglint's correction using the Thresholding approach (B2-B7), which produces the best correlation with R2 of 0.7364 and (B7-B2) with R2 = 0.7351. Contrastingly, the lowest correlation was generated using the Mean Value ((B2 + B7) / 2) approach without Sunglint's correction with R2 = 0.4015. So this research proves that the Worldview 3 image with Sunglint correction can provide bathymetry data, especially in shallow waters.]]>
<![CDATA[Pembuatan Pupuk Organik Cair dari Urine Kambing Jawa Randu dan Sampah Organik Rumah Tangga ]]>
<![CDATA[Fahlevi, Agam Yogi]]>;
<![CDATA[Purnomo, Zusuf Tri]]>;
<![CDATA[Mulia Shitophyta, Lukhi]]>
<![CDATA[ Rekayasa Vol 14, No 1: April 2021 ]]>
Publisher : <![CDATA[Universitas Trunojoyo Madura ]]>
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DOI: 10.21107/rekayasa.v14i1.7560
<![CDATA[Waste from processed household activities that do not experience good management can cause environmental pollution. The rubbish in the form of vegetable and fruit waste still contains waste that can be further processed to be more useful. Liquid organic fertilizer is fertilizer whose basic ingredients come from animals, plants, or both that have undergone a process of fermentation and its final form is liquid. The making of liquid organic fertilizer from javanese goat urine and household organic waste with the addition of EM4 bioactivators (effective microorganisms) aims to determine the effect of fermentation time length, the effect of adding EM4 bioactivators, and the effect of adding the javanese goat urine with household organic waste compared to household organic waste without the addition of javanese goat urine to the pH, N, P, and K contents in liquid organic fertilizer. The results showed that for the analysis of pH obtained in samples of 4.5 to 8.5, while for the analysis of nitrogen, phosphorus, and potassium the best nitrogen (N) content was 2.3672% in 10 mL EM4 samples with a fermentation time of 21 days. The best phosphorus (P) content was 0.6857% in the 15 mL EM4 samples with a fermentation time of 14 days. And the best potassium (K) content was obtained at 1.0559% in the EM4 samples of 10 mL with a fermentation time of 7 days.]]>
<![CDATA[Evaluasi Desain Bejana Bertekanan pada Radiator Cooling System Menggunakan Material SPCC-SD ]]>
<![CDATA[Sukarman, Sukarman]]>;
<![CDATA[Khoirudin, Khoirudin]]>;
<![CDATA[Murtalim, Murtalim]]>;
<![CDATA[Mulyadi, Dodi]]>;
<![CDATA[Rahdiana, Nana]]>
<![CDATA[ Rekayasa Vol 14, No 1: April 2021 ]]>
Publisher : <![CDATA[Universitas Trunojoyo Madura ]]>
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DOI: 10.21107/rekayasa.v14i1.9570
<![CDATA[This study discusses the analysis of a pressure vessel's design in the Radiator Cooling 1000 (RC-1000) system, which operates at a design temperature of 110oC. A pressure vessel is a container of gaseous, solid, or liquid material subjected to internal or external pressure and can withstand various other load variations. The pressure vessel on the RC-1000 system has a outer diameter of 87.8 mm or 3.46 inches and will experience an internal pressure of about 20.84 psi or 143.7 kPa, so it must be designed safely. This research method uses analytical and experimental methods. The analytical method is used to calculate the thickness of the pressure vessel material, the maximum allowable working pressure, and the hydrostatic test calculation. While the experimental method was carried out on the hydrostatic test process, the evaluation was based on the prevailing regulations in the Republic of Indonesia. Using the SPCC-SD material (JIS 3141), it was found that the minimum thickness of this pressure vessel is 0.0453 inches on the shell side and 0.0435 inches on the head/head side. The thickness of the material used on the shell side and head/head is 0.0472 inches in practice. This pressure vessel has passed the hydrostatic test at 232.1 psi or 1600 kPa.]]>
<![CDATA[Peningkatan Produksi Pangan melalui Sistem Integrasi Teknologi Aquaponics-Recirculating Aquaculture System (A-RAS) pada Budidaya Ikan Lele di Desa Kaliuntu Kabupaten Tuban ]]>
<![CDATA[Yogita Ayu Dwi Susanti]]>;
<![CDATA[Zulkisam Pramudia]]>;
<![CDATA[Abdul Azis Amin]]>;
<![CDATA[Lutfi Ni’matus Salamah]]>;
<![CDATA[Adi Tiya Yanuar]]>;
<![CDATA[Andi Kurniawan]]>
<![CDATA[ Rekayasa Vol 14, No 1: April 2021 ]]>
Publisher : <![CDATA[Universitas Trunojoyo Madura ]]>
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DOI: 10.21107/rekayasa.v14i1.10254
<![CDATA[Aquaponics-Recirculation Aquaculture System (A-RAS) technology combines recirculation systems in aquaculture with aquaponics technology. A-RAS technology can reduce water use in the aquaculture system and maintain water quality to fulfill aquaculture standards. The application of this system makes pond water that has been used for fish farming can be reused. This research used a descriptive analysis method to analyze A-RAS's application to improve food production through A-RAS in Kaliuntu, Tuban, East Java. This study's results showed that temperature during the study ranged from 27.5-30 °C, pH value ranged from 6.8-8.7, and the dissolved oxygen was around 3.1 mg/l. The content of nitrate, nitrite, and ammonia in the A-RAS technology was around 12.5 mg/l, 0-0.5 mg/l, and 0.003-0.09 mg/l, respectively. The application of A-RAS technology can increase the capacity and quality of the harvest of catfish cultivation. Harvest capacity increased from 100 kg to 180-190 kg / pond, the Food Convention Ratio (FCR) decreased from less than 1.0 to 0.705 and the Survival Rate (SR) increased from less than 75% to more than 95%. The results showed that the application of A-RAS technology could increase food production in Kaliuntu Village, Tuban Regency.]]>
