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All Journal Jurnal Ilmiah Poli Rekayasa Elektron Jurnal Ilmiah JOIV : International Journal on Informatics Visualization Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Teknik Mesin International Journal of Research in Community Services Prosiding Seminar Nasional Sisfotek (Sistem Informasi dan Teknologi Informasi) IJIS Edu : Indonesian Journal of Integrated Science Education JAPEPAM, Jurnal Pengabdian kepada Masyarakat
-, Nasrullah -
Politeknik Negeri Padang
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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The Design of Temperature and Soil Humidity Control with Fuzzy Method on Greenhouse for Red Chilli Pepper Seedling Anton Hidayat Hidayat; - Nasrullah; Darma Putra; - Ramiati
JOIV : International Journal on Informatics Visualization Vol 3, No 3 (2019)
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1094.159 KB) | DOI: 10.30630/joiv.3.3.168

Abstract

The ideal soil temperature and humidity in red chilli pepper seedling is very important in the growth of the plant. The cultivation of red chili plants in greenhouses is very good, because the environment in greenhouses can be manipulated according to the needs of the plants. The ideal temperature for red chili breeding is 25oC to 27oC, for soil moisture drainage and aeration must be maintained during growth. Red pepper plants can grow well in moisture 50% to 70%, irregular soil moisture can cause rooting disease and root decay in plants. Cultivation of plants in greenhouses can maintain the nursery process, because the plants can be cultivated in accordance with the Operational Procedure Standards (SOP). Generally the farmers in breeding of red pepper is done in a trational way. In the process of temperature control and soil moisture using fuzzy method where the system can work automatically, which can facilitate the work of farmers in seeding plants from uncertain environmental conditions outside. In the measurements that have been done can be taken conclusion percentage error mean temperature from setpoint which have been set at the time in the morning equal to 2,48%, at noon equal to 9,79% and at night equal to 1,93%. Then each addition of 1 second watering, soil humidity rise up to 0.067%.
Rancang Bangun Mesin Penggulung Tali Rafia Rahman Fauzi; Nasrullah Nasrullah; Feidihal Feidihal; Hendra Hendra
Jurnal Teknik Mesin Vol 12 No 1 (2019): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Raffia rope is very popular because of its many uses, in other words it is a versatile tool. In general, raffia ropes are widely used for various matters such as business in agriculture, as a binder, as a decoration for crafts, as hangers for clothes, sewing sacks, as reinforcement materials, and many others. Raffia straps are available in the form of rolls. At this time, there are still many processes of rolling raffia still using manual methods such as direct hand rolling or using traditional methods that still use a lot of human power so that it is considered ineffective and inefficient. Because there is still a lot of traditional process of rolling the rope or using hands, the idea arises to make a raffia rope rolling machine using a motorbike and transmission. Technically appropriate technology is a bridge between traditional technology and advanced technology, therefore socio-cultural and economic aspects are also dimensions that must be taken into account in managing appropriate technology. From the desired goals, appropriate technology must apply methods that are resource-efficient, easy to maintain, and have minimal minimalistic impact. The aim of this research is to design, make and test rapia rope rollers so that they are suitable to be used to help facilitate the work of the community in the process of rolling rapia. From the results of design design. From the results of the testing obtained the tool is able to produce rolls as much as an average of 58 rolls per hour
Kaji Eksperimental Pengunaan R22 dan R410A Berdasarkan Variasi Laku Aliran Massa Pada Mesin AC Dian Wahyu -; Nasrullah - -; Khairul Amri -
Jurnal Ilmiah Poli Rekayasa Vol 9, No 2 (2014)
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (290.432 KB) | DOI: 10.30630/jipr.9.2.60

Abstract

The development of the use of air conditioning machines (AC machines) is very high , due to the increased consumption of electricity for household needs are also increasing . Based on field observations of R22 refrigerant is still widely used in commercial air conditioning machines , where the refrigerant has properties that are not friendly to the environment . R410A refrigerant has been recommended to replace worn R22 . It became one of the rationale for conducting the assessment directly to efforts to reduce electricity consumption due to the use of air conditioning machines in the household and the efforts to preserve the environment . The research was conducted on a commercial air conditioning machines by testing the engine for both types of refrigerant ( R22 and R410A ) . Testing the engine characteristics , tested by varying the refrigerant mass flow rate for both refrigerants . The test results showed , electricity consumption ( compressor power ) for the use of both types of refrigerants is similar but uses R410A refrigerant produces a greater cooling effect than by using refrigerant R22 . In Overall effect of the variation of mass flow rate for both refrigerants clearly evident , the increase in mass flow rate causes enhancement of several variables such as the increase in compressor power , cooling effect , the effect of heat release , but for the coeficient of perfomance ( COP ) , the addition of the mass flow rate after COP The optimum value of the COP does not increase anymore . In this study, the highest COP values obtained in the refrigerant mass flow rate 3.4 g / s for R410A and R22 for 1.9 has the highest COP of 1.7 at a flow rate of refrigerant mass 3 g / s . For maximum cooling impact , generated by 0.502 kW to 0.572 kW usage for R22 and R410A.
Mengatur Kecepatan Motor DC dengan menggunakan Metode Fuzzy pada Alat Perontok Padi Anton Hidayat -; Nasrullah - -; Ramiati - -
Jurnal Ilmiah Poli Rekayasa Vol 11, No 2 (2016)
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.4 KB) | DOI: 10.30630/jipr.11.2.23

Abstract

In designing this device, the rice thresher will be lighter, so it will be easier in lifting, simpler in using so farmers as main users will easier in operating this instrument with featuring speed controllable by applying fuzzy method, and also no fossil fuels used because it utilize sunshine as green energy to drive DC motor. Solar cells are used to absorb sunshine in rice thresher machine because it easier in maintenance. The test results of the rice thresher machine is the reduction of the avarage motor speed by 195 rpm every each five rice straws, in the other hand the maximum electric current is needed to spin the rice threser  is 6 ampere and minimum electric current is 2.2 ampere. Furthermore, to stabilize motor speed at 2000 rpm, the avarage time required is 6 seconds when this machine loaded with rice straws. The eficiency of the rice thresher machine is 96%, it mean the avarage time to thresh the rice is 9 rice straws every each seconds.
Rancang Bangun Generator PWM Berbasis Mikrokontroler AVR ATmega Firdaus firdaus; Rivanol Chadri; Nasrullah Nasrullah
Elektron : Jurnal Ilmiah Volume 12 Nomor 2 Tahun 2020
Publisher : Teknik Elektro Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/eji.12.2.171

Abstract

PWM is widely used in the fields of automatic control, power electronics and cellular communications. Previous research designed a PWM generator using the OMAP-L138 chip to produce a simple, high-precision, flexible and portable circuit. Another generator uses a single board computer FEZ Panda III and an Arduino board for power inverters. While the FPGA Spartan 3 is also used to generate PWM signals that can vary the duty cycle. In this paper, the PWM signal generator is made using the AVR ATmega8535 microcontroller where the frequency parameters and the output signal duty cycle can be adjusted via the keypad. The signal is tested using a measuring instrument for its accuracy. The ATmega AVR microcontroller family has a timer / counter with one of its operating modes, namely fast PWM. In order to change the frequency and duty cycle as desired, the ICR register is used to store the TOP value and the OCR register for the MAX value. The OCR value determine the duty cycle and the ICR value specify the frequency. The results are the higher the PWM frequency, the greater the value of the measured and desired frequency difference, this is because the large frequency makes ICR register value becomes small even though the frequency divider at minimum value. The difference between measurements and calculations on the Duty Cycle gives the result under 1%. This difference also occurs due to the rounding of the ICR and OCR values, but at a frequency of 20 kHz and a 25% Duty Cycle where the ICR value is 599 and OCR is 116 resulting in the minimum difference in frequency and Duty Cycle. From the experiments that have been carried out, the design of the PWM generator based on the AVR ATmega microcontroller has been successfully realized
Rancangan Pemetaan Sebaran Covid-19 di Kota Padang Berbasis Web Geospasial Yuhefizar; Ervan Asri; Nasrullah
Prosiding SISFOTEK Vol 4 No 1 (2020): Vol 4 No 1 (2020): SISFOTEK 2020
Publisher : Ikatan Ahli Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (420.185 KB)

Abstract

Starting from Wuhan in China, the new type of corona virus (SARS-CoV-2) has spread to various countries in the world, including Indonesia, which is known as the COVID-19 disease. On March 11, 2020, WHO declared COVID-19 a pandemic, which is an epidemic that has spread to several countries or continents, and generally affects many people. The President of the Republic of Indonesia has issued Presidential Decree No. 12/2020 concerning the determination of COVID 19 as a non-natural national disaster. This indicates that the Covid 19 Pandemic is increasingly widespread in Indonesia, including the city of Padang and that strategic steps are needed to fight its spread, one of which is in providing information that is easy to read and understand by the public. For this reason, in this study we utilize geospatial web technology to disseminate Covid 19 information to urban villages in Padang City. Geospatial Web is part of WebGis which is able to provide location-based information in more detail and in map form and is presented using web technology so that it can be accessed by the wider community easily. There are five types of geospatial web services used, namely Web Map Service, Web Feature Service, Web Coverage Service, Web Map Tile Service, and Web Processing Service. It is hoped that the results of this study can contribute to the Padang city government and its community regarding the information on the spread of Covid-19 in more detail and location-based.
Analisis Kinerja Turbin Hidrokinetik Dengan Selubung Diffuser Pada Kondisi Yaw Misalignment Berdasarkan Variasi Kecepatan Aliran Air ., Nasrullah; ., Nofriadi; ., Nasirwan; Leni, Desmarita; Kesuma, Dytchia Septi
Rekayasa Material, Manufaktur dan Energi Vol 6, No 2: September 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i2.16190

Abstract

Yaw Misalignment condition has detrimental effects on the performance and efficiency of hydrokinetic turbines. This phenomenon occurs when the direction of water flow hitting the turbine blades is not aligned with the turbine's movement direction. In this research, an analysis is conducted on the performance of a hydrokinetic turbine equipped with a diffuser shroud under Yaw Misalignment conditions, considering variations in water flow velocity. The dataset used in this study consists of water flow velocity data, yaw angles, tip speed ratio (TSR), and power coefficient (Cp) of a 19.8 cm diameter horizontal-axis hydrokinetic turbine operating under Yaw Misalignment conditions. Experiments were conducted at three water flow velocity levels: 0.7 m/s, 0.9 m/s, and 1.1 m/s. Additionally, yaw angle variations were applied ranging from 0° to 25° at 5° intervals. Data analysis involved the application of Pearson correlation analysis and descriptive statistical analysis to identify the maximum Cp values. The analysis results indicate that the highest maximum Cp value is 0.711, with a tip speed ratio (TSR) of 4.33, achieved at a yaw angle of 0° and a water flow velocity of 0.9 m/s. This indicates that under these conditions, the turbine reaches its peak performance in converting water flow energy into mechanical power.
Optimizing Students' Understanding of the Mechanical Properties of Stainless Steel through Interactive Learning Media based on Machine Learning Karudin, Arwizet; Leni, Desmarita; Nasrullah, Nasrullah; Sumiati, Ruzita; Haris, Haris
IJIS Edu : Indonesian Journal of Integrated Science Education Vol 6, No 2 (2024): July 2024
Publisher : UIN Fatmawati Sukarno Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29300/ijisedu.v6i2.3114

Abstract

Traditional learning media tends to have limitations in providing interactive experiences that can stimulate better understanding. This is supported by changes in learning styles among students, influenced by extensive exposure to computers and the internet, leading students to prefer learning with the aid of visualizations. This research designs, develops, and tests a machine learning-based visualization tool integrated with the Streamlit framework to enhance students' understanding of the mechanical properties of materials. This visualization tool consists of four main features: data analysis, correlation analysis, 3D visualization, and prediction models using machine learning. The data used for training the machine learning model includes tensile test data of low-alloy steel, comprising mechanical properties, chemical elements, and heat treatment temperatures. The research results indicate that the visualization tool can illustrate the cause-and-effect relationships of parameters influencing the changes in the mechanical properties of low-alloy steel. Each feature in this visualization tool can be utilized to support the analysis of mechanical properties and improve students' understanding of material mechanical properties. Additionally, the visualization tool is evaluated by experts, with information accuracy scoring 4 in the good category, visualization quality at 4.25 in the good category, suitability for learning at 4 in the good category, and ease of use at 4.5 in the good category. Nevertheless, further research and development are needed to test and expand the use of this visualization tool in various learning contexts and other material fields.
Pengabdian Kepada Masyarakat Penyerahan Mesin Lemang Untuk Home Indutri Pada Usaha Lemang Tapai Barokah Sumiati, Ruzita; Adriansyah, Adriansyah; Leni, Desmarita; Yetri, Yuli; Haris, Haris; Nasirwan, Nasirwan; Mayana, Hendri Candra; Nasrullah, Nasrullah
JAPEPAM, Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 1 (2023): JAPEPAM
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/japepam.v2i1.13

Abstract

Ciri khas makanan tradisional di minangkabau salah satunya adalah lemang tapai dengan proses pembuatan lemang tapai terbilang panjang dan rumit, sehingga sangat di perlukan sentuhan teknologi untuk mempercepat pengerjaan membakarannya. Usaha home indusri lemang tapai sudah berlangsung sejak lama dan bisnis keluarga bagi pengusaha barokah lemang tapai mereka mempunyai karakteristik tradisional. Untuk memulai pengabdian kepada masyarakat tim pelaksana terlebih dahulu mengadakan survey ke tempat mitra yang bersangkutan dan meninjau proses pembuatan lemang. Setelah mendapatkan gambaran tim pengabdian langsung membuat Mesin teknnologi tepat guna untuk membantu usaha lemang tapai barokah. Mesin pembakaran lemang ini diserahkan kepada mitra sebagai bentuk kepedulian tim untuk pengembangan usaha home industri lemang tapai barokah. Mesin lemang bekerja sebagai Mesin bantu pembakaran lemang dengan teknologi tepat guna memberikan peningkatan produktivitas dari produksi dalam pembuatan lemang tapai pada usaha home industri barokah.
Spreading Love in Fitra Qaseh Refuge Home Malaysia: A Community Service Activity Sumiati, Ruzita; Fardinal, Fardinal; Menhendry, Menhendry; Nofriadi, Nofriadi; Nasrullah, Nasrullah; Abdullah, Irinah binti; Lim, Hooi Peng
International Journal of Research in Community Services Vol. 5 No. 2 (2024)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v5i2.595

Abstract

Fitra Qaseh Orphanage is a shelter for children who have been abandoned by their parents due to social problems within the family. Fitra Qaseh Orphanage which is known as the Fitra Qaseh Refuge Home is located in Johor Bahru City, Malaysia. Fitra Qaseh currently currently accommodates 53 children ranging from 1 month to 17 years old. The problem that faced by Fitra Qaseh is the development of facilities for the residents' outdoor play and activities. Fitra Qaseh outdoor activities, providing motivation for residents of Fitra Qaseh shelter homes in the form of in the form of education, religious knowledge, protection and affection, Providing assistance to fulfil the daily needs of residents both food and fulfil the daily needs of residents both food and clothing for daily needs residents of the Fitra Qaseh protection house. For this reason, Ibrahim Sultan Polytechnic (PIS) and Politeknik Negeri Padang (PNP) collaborate in the context of international community service International. The aim of this collaborative community Service activity is to address issues that arise at the orphanage. The community service is implemented using the applicative method, which directly solves the problems that exist in partners. The step of activity is survey, collecting data, plan resolve the problem and action. The result of this program are The results of this activity are that the facilities and infrastructure of the orphanage have been repaired, assistance has been provided and children have been motivated to keep learning to reach their goals. 
Co-Authors ., Nasirwan ., Nofriadi Abdullah, Irinah binti Adriansyah Adriansyah Anak Agung Gede Sugianthara Anton Hidayat Arwizet Arwizet, Arwizet Candra Mayana, Hendri Darma Putra Desmarita Leni Dian Wahyu Fardinal, Fardinal Feidihal Feidihal Haris Haris, Haris Hendra Hendra Kesuma, Dytchia Septi Khairul Amri Lim, Hooi Peng Menhendry Nasirwan Nasirwan Nofriadi Nofriadi Rahman Fauzi Ramiati Ramiati Rivanol Chadri Ruzita Sumiati Yuhefizar Yuhefizar Yuli Yetri