We would like to inform you that Volume 14, Number 2, and earlier issues of Energy: Jurnal Ilmiah Ilmu-ilmu Teknik are available on the old system at the following link: https://ejournal.upm.ac.id/index.php/energy/. This is due to technical issues caused by a recent hacker attack, which has prompted us to create a new, more secure system for future publications. As a result, issues from Volume 15, Number 1 onwards will be published on the new system at: https://e-journal.upm.ac.id/index.php/energy/. We appreciate your understanding and cooperation during this transition, and we sincerely apologize for any inconvenience caused.
Design and Implementation of a Web-Based Monthly Health Reporting System for the North Lampung District Health Office
The management of public health data at the district level still faces significant challenges, including manual reporting processes, data redundancy, and delayed information aggregation. These issues are also observed in the North Lampung District Health Office, where monthly health reports are still processed using fragmented and unintegrated systems. This study aims to design and implement a web-based monthly health reporting information system to improve data accuracy, integration, and reporting efficiency. The system was developed using the Rapid Application Development (RAD) method, which emphasizes iterative development and active user involvement. The system integrates health center data, disease classification (ICD-10), and LB1 morbidity reporting into a centralized platform equipped with real-time dashboards. Software evaluation was conducted using black-box testing and white-box testing, including cyclomatic complexity and code coverage analysis. The results indicate that all functional modules operate correctly, with code coverage exceeding 87% across all components. The system successfully reduces reporting time, improves data consistency, and enhances decision-making support for health authorities. Therefore, the proposed system provides an effective and reliable solution for digital transformation in regional health reporting systems.
Copyright (c) 2026 ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK https://creativecommons.org/licenses/by-nc/4.0
Web-based Mobile New Student Admission Information System at Darul Fikri Wattarbiyah Islamic Boarding School
Darul Fikri Wattarbiyah Islamic Boarding School currently faces challenges in the efficient management of new student admissions due to its conventional and manual registration system. This poses a risk of data redundancy, difficulty in quickly validating files, and limited accessibility for prospective guardians outside the region. This study aims to design and build a mobile web-based New Student Admissions Information System (PSB) to digitize the entire registration cycle. The system was developed using the Waterfall method, which includes sequential stages of needs analysis, system design, coding, and testing. The selection of a mobile web platform is intended to allow the system to be accessed flexibly via mobile devices without requiring the installation of additional applications. The result of this study is an integrated platform capable of managing digital forms, uploading required files, administrative validation by the committee, and announcing selection results in real time. The implementation of this system is expected to improve data transparency, accelerate the operational performance of the PSB committee, and provide easy access for the community to reach educational services at Darul Fikri Wattarbiyah Islamic Boarding School in a more professional and efficient manner.
Design and Development of a Web-Based SBMPTN Try-Out Application: A Case Study at SMK N 2 Kotabumi
This research is motivated by the suboptimal state of exam simulation media for students at SMK N 2 Kotabumi in preparing for the Joint Entrance Examination for State Universities (SBMPTN), where conventional tryout processes result in slow and inaccurate data processing. As a solution to these issues, this study designs a web-based tryout application developed using the Waterfall method through the stages of requirement analysis, design, coding, and systematic testing. The application is designed to simulate the Computer Assisted Test (CAT) mechanism in real-time, thereby providing instant and transparent assessment feedback for both students and the school. The results of this research are expected to provide an effective self-simulation platform to enhance academic readiness and the accountability of student learning evaluations at SMK N 2 Kotabumi, ultimately achieving a more competitive graduation quality at the national level.
Development of Inventory and Goods Lending Systems Using QR Code at Universitas Muhammadiyah Kotabumi
Asset and inventory management in higher education institutions is a crucial aspect of supporting academic operational efficiency. At Universitas Muhammadiyah Kotabumi (UMKO), the current inventory recording system and lending procedures are still conducted conventionally, leading to risks of data inaccuracy, slow information retrieval, and the potential loss of physical lending forms. This study aims to design and develop an integrated inventory and goods lending information system utilizing Quick Response (QR) Code technology. The system development method employed is the Waterfall model. This method was selected based on the characteristics of inventory systems that require structured development stages and comprehensive documentation. QR Code technology is implemented to automate item identification and accelerate lending transactions through mobile device scanning. The result of this research is a web-based application capable of providing real-time asset data, facilitating item tracking, and generating accurate inventory reports. The implementation of this system is expected to minimize human error, increase asset management transparency, and support the modernization of digital infrastructure within Universitas Muhammadiyah Kotabumi for more professional services.
Designing Solar Power Plants as a Source of Electricity for Insect Traps
This study proposes the design and evaluation of a solar-powered insect trapping system as an environmentally friendly solution for pest control in agricultural fields. The system integrates a photovoltaic (PV) module as the primary energy source with a microcontroller-based control unit. A Passive Infrared (PIR) sensor is employed to detect insect movement, while an electric grid mechanism is used for pest eradication. The system is controlled using an Arduino microcontroller to ensure synchronized operation between detection and execution components. The research methodology involves system design, hardware and software implementation, and field testing in rice cultivation areas. Experimental results indicate that the device provides an effective illumination radius of approximately 5 meters and successfully captured 87 insect pests within two days of operation. Furthermore, the system demonstrates stable energy performance, with efficient battery charging during the daytime and reliable operation at night. These findings confirm that the proposed solar-powered insect trap is a viable, sustainable, and eco-friendly alternative to conventional pesticide-based pest control methods. Future work will focus on optimizing light intensity, improving sensor accuracy, and integrating ultraviolet light to enhance insect attraction.
Enzymatic Conversion of Biomass to Biofuels: Process Mechanisms, Enzyme Optimization, and Industrial Challenges
Biomass conversion to biofuels has gained significant attention as a sustainable alternative to fossil-based energy, with enzymes playing a crucial role in enhancing process efficiency and selectivity under mild operating conditions. This review article examines the roles of key enzymes, including cellulases, hemicellulases, amylases, lipases, and laccases, in lignocellulosic hydrolysis, lignin structure disruption, and lipid esterification and transesterification reactions, enabling the production of bioethanol and biodiesel under milder operating conditions with high selectivity. Comparative insights are provided to highlight the relative performance of these enzymes in terms of conversion efficiency, substrate specificity, operational stability, and tolerance to process conditions, as reported in recent studies. The review further examines enzyme optimization strategies, including immobilization techniques, protein and metabolic engineering approaches, and advanced bioreactor configurations, which have been shown to improve enzyme reusability and overall process productivity. Quantitative performance indicators reported in the literature, such as biofuel yields and conversion efficiencies, are critically analyzed to assess the feasibility of enzymatic routes compared to conventional chemical processes. Finally, key industrial challenges related to enzyme cost, stability, and scalability are discussed, along with emerging technological pathways that support the potential industrial implementation of enzymatic biomass conversion for biofuel production.
Nonlinear Trade-Off Between Agitator Speed and Biodiesel Quality in Transesterification: A Lab-Scale Study
The agitator speed controls the intensity of interaction between the immiscible oil and methanol phases during transesterification. This, in turn, shapes the overall reaction environment during the biodiesel production process. While higher agitation rates are often associated with increased mass transfer, their impact on the resulting fuel properties is not always proportional. In a controlled laboratory setting, the effect of agitator speed was examined at 300, 500, 700, and 900 rpm, with particular attention paid to biodiesel yield, density, kinematic viscosity, and flash point. A gradual shift in system behavior became apparent as the agitation rate increased. In the intermediate range of 500–700 rpm, the process tended to stabilize, producing biodiesel with relatively consistent characteristics. The measured kinematic viscosity was between 4.42 and 4.45 cSt, accompanied by a density of approximately 861 kg/m³. However, pushing the system to higher agitation rates led to a different response. At 900 rpm, the yield dropped sharply to 49.53%, and the viscosity increased to 4.92 cSt. This behavior indicates the onset of unfavorable hydrodynamic conditions, where intensive mixing likely disrupts phase separation and promotes the formation of a stable emulsion. Meanwhile, the flash point continued to increase from 124.7 °C to 166.8 °C, indicating a progressive decrease in residual methanol. Overall, these observations suggest that the influence of stirrer speed is governed by competing mechanisms rather than a simple monotonic trend. Operation in the 500–700 rpm range appears to offer a more reliable compromise, where conversion and fuel properties remain balanced. From an engineering perspective, this range provides a useful reference for establishing operating conditions in biodiesel reactors, especially when considering process development beyond the laboratory scale while maintaining consistent product quality.
Design and Development of an Automatic T-Shirt Folding Tool Based on the Arduino Uno Microcontroller
One of the household chores that is concerned about this problem is folding the t-shirt from the drying process. When there are lots of stacks of t-shirts, especially for laundry entrepreneurs. Manually folding a t-shirt will certainly look less presentable if done very quickly. The purpose of this study is to accelerate the activity of the laundry entrepreneur, therefore a model of tool that can help in t-shirt folding quickly with a workforce is automatically created. Using six servo motors as a folding drive on the right, left and bottom. To start the process when the tool is used, by utilizing an ultrasonic sensor to start and stop the folding process automatically. The components in this study are controlled by the Arduino UNO microcontroller so that it can work automatically in accordance with the commands that have been applied. There are ten tests using t-shirts of the same size. So the results of the ten testing processes carried out a folding duration of about 3 seconds with 1 t-shirt, 9 seconds by folding 3 t-shirts, 15 seconds by folding 5 t-shirts, 21 seconds by folding 7 t-shirts, and 30 seconds by folding 10 t-shirts. It can be concluded that folding a t-shirt using this tool feels faster and neater than the manual folding process.
Copyright (c) 2022 ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK https://creativecommons.org/licenses/by-nc/4.0
Design of a Portable Tidal Power Plant (PLTPS) Using Static Feet
The potential of marine energy to generate electricity is one of the potentials that is not widely known to the general public. One of the natural phenomena that can be used as a power plant is the tides of sea water. Tidal Power Plant is a power plant using sea water when it is high tide and using estuary water power when the sea water is receding. Tidal Power Plants are generally built permanently using dams, then a Portable Tidal Power Plant is developed that can be placed on the beach when the tide is high and in the estuary when the sea water is receding. The method used in this research is the experiment method on Portable Tidal Power Plant. The Portable Tidal Power Plant uses seawater and estuary water to turn the mill, then the windmill will produce mechanical energy, and the generator will convert the mechanical energy from the wheel into electrical energy. The Portable Tidal Power Plant was tested on the beach when the sea water is high, the highest voltage is 3.3 V and the highest RPM is 413 RPM. When tested on the estuary when the sea water is receding, the highest voltage is 2.6 V and the highest RPM is 284.4 RPM
Design and Build a Web-Based Sumberagung Village Information System Using Php and Sql
The Probolinggo Regency Government encourages every village to have a website page to makeit easier for the community to know broadly about programs and activities, as well as budget realization within the village government. In addition, the existence of a website can be used to promote the potential of the village. Although so far not all villages in Probolinggo Regency have a website, but for villages that already have internet network access, it is an obligation to have a website as a means of sharing information with the community. The purpose of this research is to design and build a system that can help the community to know the news, programs and data of Sumberagung village. This village information system uses the PHP programming language and SQL database that can make it easier for the community to get information related to the village and improve the quality and efficiency of community services. This research was conducted inseveral stages, namely the design of software using flow charts or called flowchats and software development using the waterfall model. From the results of the overall analysis of the tests carried out will determine the feasibility of the system features that have been made. Feature -System features are considered feasible if the overall test results are in accordance with the expected output. And in the tests that have been carried out by this research based on the Black Box test table above, it can be concluded that the features of the system built by the researcher can be concluded that these features have been running well and according to needs.
Leak Monitoring Prototype and Gas Availability in CO2 Type APAR (Light Fire Extinguisher)
Fire safety is an important aspect that must be considered when in a building. A lightweight fire extinguisher (APAR) is a piece of mandatory standard equipment for building safety. Therefore, it requires maintenance operations to ensure the fire extinguisher is functioning properly whenever needed. This monitoring activity is still done manually with human power. Moreover, these standard controls and checks are often neglected. In this study, we propose a prototype of the gas availability monitoring system for CO2-type fire extinguishers. We adopt NodeMCU esp8266 as processor, gas sensor as CO2 reader and buzzer as output. This design serves to detect the level of CO2 concentration around the location of the extinguisher tube placement. The system will also sound a buzzer and send a notification via telegram when the CO2 concentration reading is not within the normal range, which means a gas leak has occurred. Features and services have been validated through two test scenarios
Designing Business Travel Information System (SIMPERNAS) Using the UML
Official travel is a trip made by the State Civil Apparatus from the place of duty to the destination with the aim of carrying out work that must be carried out at different locations. In practice, the administration of official travel is often not well organized so that there are often overlapping trips made by an employee. Not infrequently in the examination by the Examining authority,there are incidents of someone traveling in the same period in two different places. And what often happens is that accountability often goes unnoticed, especially what has passed, because everything is done manually, so it is difficult to find out who has taken official trips and what responsibilities are, both financially and technically, what results are obtained. has been obtained, whether it can be used by the Agency in order to strengthen the competence of the Agency that assigns the trip in question. What often happens is that there are also official trips that have been administratively legalized but in practice, for some reason or other, the person concerned is not actually on an official trip. To avoid things due to manual administrative weaknesses as mentioned above, the department that manages official travel needs to be assisted with an automation system that can record, record and analyze as well as provide all the necessary reports needed both in aggregate and in detail from each trip. which is conducted.
Yilmak Laundry Machine Maintenance Analysis with Reliability Centered Maintenance (RCM) and Risk Based Maintenance (RBM) Methods (Case Study: Laundry Department of PT. Eratex Djaja)
PT. Eratex Djaja is a garment company that produces products in the form of apparel. One of the parts in production is the Washing section. There are several machines in the washing section, including: Tonello Machines, Tolkar, Yilmak, Ramsons, Belly. The problem that was found in the Washing section was that the Yilmak Laundry Machine had a high downtime which reached 9180 minutes. This study aims to analyze the system on these machines using the Reliability Centered Maintenance (RCM) and Risk Based Maintenance (RBM) methods. From the analysis of the RCM method, it is known that the components of the Motor Drive, Pulley + V-belt, and shaft + Bushing are critical components. From the calculation of Total Minimum Downtime (TMD), the optimum replacement interval for the Motor Drive component is 25 days, Pulley + V-belt 32 days, and shaft + Bushing 30 days. From the calculation using the RBM method, the value of risk received by PT. Eratex Djaja if the Yilmak Laundry machine is damaged in the amount of Rp. 412,003,141.
Analysis of Solar Power Plants and Its Application for Power Supply of Screw Pumps in Wastewater PT. POMI
The Cultivation of Domestic wastewater at PT. POMI uses the addition of a screw pump which is carried out to overcome the problem in the storage tank, where the previous submersible pump type cannot work due to changes in the content of wastewater containing fiber, causing the pump impeller get stuck in the waste fiber pump and the pump cannot work. The screw pump is considered to be very powerful and efficient to drain waste containing water, sand, mud and fiber and this pump uses an alternative energy source so that it is more efficient and does not burden the electricity generated by PLN. Utilization of solar energy as a pump resource can reduce the use of fossil fuels used by PLTU as fuel. Measuring the effectiveness of the screw pump is done by sampling to compare the output of waste water entering the reservoir with the screw pump output to the next process. The weather factor is one of the weaknesses of using solar panels. The energy needed to drive a pump of 8.1 kWh requires 21 solar panels with a capacity of 100 Wp which can produce energy of 400 Wh per panel with with parallel 4 configuration with a capacity of 100 Wp per panel.
Heat Transfer Experiments on Electric Aircraft Battery Minichannels with Ethylene Glycol-Air Fluid
The aviation industry has changed the mass and private transportation industry, thus making aircraft more and more varied, this type of air transportation has a very high adverse effect on the atmosphere because of its very high fuel consumption and emitting so many pollutants that aircraft for the future will lead There are 2 types of aircraft, namely Hybrid-Electric Aircraft and All-Electric Aircraft. Both have the same electric power drive, but there are weaknesses in this transportation. Namely on the battery used. In general, the battery used is Lithium-ion. Lithium-ion has the characteristics of being lightweight and more durable than the others. The battery itself also has a weakness, if it is used for too long or continuously the battery will heat up and reduce battery life. Therefore, cooling the battery is also needed to reduce battery heat and maintain battery life. The results obtained in this study are the use of working fluid 75% Ethylene Glycol –25% Water is better than 75% Water –25% Ethylene Glycol.
The Influence of the Number of Threads on the Archimedes Screw Turbine Prototype for Green and Renewable Energy Generation
Energy needs in Indonesia are currently still dominated by energy based on fossil fuels, such as oil and coal. The disadvantage of fossil fuels is that they are not environmentally friendly. Water is an alternative energy source that can replace fossil-based energy sources and is a renewable energy. The Archimedes Screw turbine is a turbine suitable for use in Indonesia which has a low head river flow.This research uses an experimental method, namely designing and manufacturing an Archimedes Screw turbine. The results of the 180 minute test of the three Archimedes screw turbine models, namely threads screw type 1 produces a voltage of 2.83 volts, screw type 2 produces a voltage of 3.16 volts and screw type 3 produces a voltage of 2.49 volts. Thread type 2 which can produce a greater voltage for 180 minutes, which is 3.16 volts.
Emotional Design Analysis in Online Multimedia Learning
Online learning utilizes multimedia as a learning medium. Emotional factors are often ignored in multimedia learning research. Several studies have stated that emotional factors have a small effect on learning outcomes but have a large effect on student motivation and willingness to learn. Therefore, the emotional factor deserves further investigation of its influence on multimedia learning. Multimedia learning used in the research is in the form of powerpoint (PPT) and video. Emotional factors were measured using the PANAVA-KS method. The best multimedia learning design is a design that can help find a multimedia learning design that can evoke positive emotions so that it can be used as a good learning medium.
Prototype of Control System for Watering and Spraying Pesticide on Shallot Plants Based on Microcontroller
Shallots are one type of annual plant that belongs to the Liliaceae family. This plant is useful as a seasoning for cooking, as well as a source of much-needed vitamin C, protein, fat, and carbohydrates. On onion plants, there are several things that need to be considered, including watering and spraying pesticides. In watering and spraying pesticides, it is still done manually. Sometimes onion farmers spend too much time and are less efficient in their work, so a water irrigation and pesticide spraying system is made on onion plants on a scheduled basis. This system uses a soil moisture sensor to read data on the amount of water content in the soil, when the sensor detects the soil, the sensor will read moist or dry data. And the Real Time Clock (RTC) functions as a timer, where the specified time has arrived, the RTC will turn on the DC Motor and DC Pump. The DC motor functions as a driving force for the spraying device, and the DC Pump functions as pumping water according to a specified schedule. This system uses an Arduino Uno microcontroller as a controller of the soil moisture sensor and RTC. The result of this research is the formation of watering and spraying pesticides that make it easier for farmers to water and spray pesticides on shallot plants.
Registration Information System for Real Work Practices (PKN) and Thesis Faculty of Engineering, University of Pancamarga
A website is a collection of pages containing certain information and can be accessed easily by anyone, anytime, and anywhere through the internet. In an educational institution, of course, it is very necessary for information systems in regulating academic activities that are fast, effective, efficient, accurate to improve the quality standards of education in these educational institutions.Faculty of Engineering, Panca Marga University is one of the private universities in Probolinggo Regency with 3 (three) study programs, namely electrical engineering, mechanical engineering and industrial engineering. Final projects such as Real Work Practice (PKN) and thesis are the final tasks that must be completed by a student who will graduate from the level of undergraduate education or diploma in college.Currently, the final project administration process at the Faculty of Engineering, Panca Marga University is still computerized simply where the final task implementation data is still stored in folders made by academic staff themselves, there is no final project reporting system. This is felt inappropriate so it takes a long time to process the final project data with a large number of students. Based on this, researchers created a pkn final project information system and web-based thesis. In this study, the authors used the Waterfall Method as an application development method. The Waterfall method is a sequential development model. In the process of creating the waterfall method, it starts with analysis, design, coding, testing and maintenance.
The aviation industryhas changed the mass and private transportation industry, thus making aircraft more and more varied, this type of air transportation has a very high adverse effect on the atmosphere because of its very high fuel consumption and emitting so many pollutantsthat aircraft for the future will lead to There are 2 types of aircraft, namely Hybrid-Electric Aircraft and All-Electric Aircraft. Both have the same electric power drive, but there are weaknesses in this transportation. Namely on the battery used. The method used is the experimental method. While this type of research uses an electric aircraft battery prototype where the temperature of the working fluid will be measured with a thermocouple 1 (T1) and flowed by a pump from tank 1 to the minichannel in thebattery pack. For the battery, the temperature will be measured by thermocouple 2 (T2), thermocouple 3 (T3), and thermocouple 4 (T4) then the working fluid from the minichannel will be flowed into tank 2 where the temperature will be measured using thermocouple 5 (T5). The results obtained in this study are the use of working fluid 75% Ethylene Glycol –25% Water is better than 75% Water –25% Ethylene Glycol in terms of pressure drop, temperature value, and heat transfer convection itself. Meanwhile, for the working fluid flow velocity and Reynolds Number, the working fluid is 75% Ethylene Glycol –25% Water better than 75% Water –25% Ethylene Glycol
Working Load Analysis at Administration Office of Public Health Center Probolinggo Using WLA Methode
Analysis of the workload on the office and administration of a Probolinggo city health center needs to be done. Some officers seem to work relaxed while others do not, and some workers do not start work on time and end work early. It appears that in certain sections there is a buildup of work and not in other sections, this seems to be because workers cannot organize work according to a predetermined work schedule. By using workload analysis it can be ascertained that workers have worked well or not. From the results of the analysis it is known that some workers have worked beyond their proper work capacity (overload) and some workers are still working casually.
Digital Image Processing for Identification of Types of Skin Diseases Using the Convolutional Neural Network (CNN) Method
Skin disease is the most common disease and the fastest to infect the human body. This happens because the skin is the first organ to receive stimulation from the outside in the form of touch, temperature and other stimuli. Skin disease consists of several types that have a color texture that is almost the same by naked eye. Thus, an approach is needed to recognize the types of skin diseases with the help of image processing systems and artificial neural networks. The identification method used in this study is the Convolutional Neural Network (CNN). The infected skin image is used as an input image for image processing. Prior to identification, image pre-processing was carried out, namely resizing, grayscaling, using the Convolutional Neural Network method. The testing process in this study used 70 types of skin disease images for validation data and 35 types of skin disease images for data testing. The results of this study the Convolutional Neural Network method can recognize each image of a type of skin disease with anaccuracy of 98% in the validation testing process and 85% in the testing process.
Document Signature Image Recognition System Using the CNN (Convolutional Neural Network) Method
A signature is a marker or identity in a document. Signatures have an essential role in verifying and legalizing documents. The signature is not just any sign but is a legal one and is the original image of the owner. With the development of today's technology, signature pattern identification can not only be done manually but can also be done with the help of a computer. However, computers cannot immediately carry out the identification process, instead, a pattern recognition process is needed beforehand which can be done by extracting signature features. This research aims to determine signature ownership, so identification is required. Identification of signature patterns is needed to recognize and distinguish the signatures of each individual based on the characteristics of the signature. Therefore this research is expected to be an alternative to minimize signature recognition errors using the CNN (convolutional neural network) method. then taken with a scanner. The results of this research are that the Convolutional Neural Network method can recognize each signature image with an accuracy of 100% in the validation testing process and 85% in the testing process.
Using The Development Life Cycle (SDLC) System As A Retail Sales Information System
This study aims to solve problems experienced at the Six Store Probolinggo Store where data recording and investigation of sales and purchase transactions still use manual goods receipts. When checking the size or stock of goods for each product when purchasing at offline user sales, the user still has to wait to find out whether stock is still there or not and the high error rate that occurs.The Six Store store needs a way to solve the problems that occur, so the researchers created a system design using the System Development Life Cycle (SDLC) method. This method was chosen because SDLC can measure and improve the sales process more effectively, minimize operational costs and increase revenue throughout the day. While programmers use VB 6.0-based applications and Ms. Access. It can be concluded if there is progress produced by the news system. This proves that regular financial bookkeeping can affect the results of the sale itself.This News System is able to obtain sales reports per note, per item variant, per item and inventory reports in such a short time according to user needs. The results of the application of the Information System show an increase in turnover of 75% every year at the Six Store Probolinggo Store.
Copyright (c) 2023 ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK https://creativecommons.org/licenses/by-nc/4.0
Design Of “Our Market” Sales Information System In The Web-Based Dringu Traditional Market
As technology advances and people's needs for shopping, considering that currently shopping can be accessed through applications. The Probolinggo District Office of Industry and Trade facilitates buying and selling without entering the market, shopping online through the WhattsApp and Instagram applications with the "Mak Blonjo" icon, the Dringu traditional market is the program's main pilot project, the lack of informationabout products is an obstacle in marketing. The aim of this research is to produce an application in the form of a website with the "Our Market" icon which is used as a sales information system in the Dringu traditional market so that it can make it easier for various parties to carry out fast and precise interactions and transactions. The software development method uses the waterfall method. The system created uses the PHP programming language with the CodeIgniter framework and MYSQL database. System testing is carried out using the black box testing method. While testing the satisfaction of the application uses the UAT (user acceptance test) test in the form of a questionnaire and performs a Likert scale calculation. It can be concluded that the level ofsatisfaction with users of the web-based "Pasar Kita" sales application reached 84.1% with 15 consumer respondents, 73.1% with 3 admin/market clerk respondents and 76.1% with 15 merchant respondents. The final result of this research is that the website-based “Pasar Kita” sales information system design can be implemented in Dringu traditional markets as a form of ordering process service.
Omron PLC Automation Control System for Souvenir Conveyors
Souvenirs are relatively small objects and the price is not expensive, forgifts or purchased as a memento from a place visited, for example from a relative's or relative's wedding. Initially, souvenir products were part of the handicrafts produced by the creativity of the craftsmen who were able to turn worthless objects into attractive handicraft products, and were in great demand by many people, especially tourists. Souvenirs are not only handicrafts for souvenirs from a place, but have penetrated into the industry which are widely used and used in events, activities and ceremonies so that they are mass produced. In everyday life, souvenirs are still using a manual system. PLC system development is relatively easy, has much better resistance, is cheaper, consumes less power, detects errors more easily and quickly, fewer cablingsystems, and easy maintenance. PLCs are widely used in industrial applications such as packaging processes, material handling, automated assembly, etc. PLCs produce an output to control goods counter conveyors. A ladder diagram program that uses the CX Programmer application can be applied as commands in the PLC and produces an output that is used to drive and control the pneumatic control system on souvenirs.
Goods Movement Arm Robot Based On Color Image Processing
The process of sending goods by humans can consider several factors, namely the weight of the goods, the amount of goods, the length of the trip and the required human labor. The heavier and more goods or the farther the distance that must be traveled, the more human power is needed to move the goods. In addition, the impossibility of human work for 24 hours is also a factor that affects the efficiency and quality of the operation. From these problems, we need a robotic arm for moving goods based on image processing. Where in the early stages it starts with collecting color data on objects using a Raspberry Pi camera which will be processed by the Raspberry Pi 3b for data to be sent to Esp32 and will be forwarded to the servo control as a tool that drives the servo motor as the main mover on the robot arm.
An Analysis of the Surface Wind Data at Budiarto Airport by Using Wind Rose Method to Improve Cadets' Fly Safety
Wind conditions affect the stages of take-off, cruising, and landing in flight. To find out the wind conditions, it is necessary to analyze the surface winds, as well as at Budiarto Airport, which is the location of the flying training for several flight schools. One of them is the Politeknik Penerbangan Indonesia Curug (PPIC). For efficiency and optimalization of the flight training schedules and for the safety of flight cadets, this research is important to do. This study aims to determine the effect of surface winds at Budiarto Airport on flight training activities for PPIC cadets, to determine the ideal wind conditions for cadets' flight training activities with solo and mutual phases, and to obtain the results of monthly surface wind trends analysis. For this reason, the wind rose method is used. This analytical descriptive study was conducted with stages of observation, problem formulation, data collection, data tabulation, and data processing. Data were collected by calculating and making tables of relative frequency of wind direction and speed. Data processing is done by making a diagram of the direction and speed of the wind using the wind rose method with the help of the WRPLOT application. The result is that the surface wind at Budiarto Airport can be categorized as safe for PPIC cadet flight training. The wind speed with the highest percentage is wind with a speed below 10 knots (94.6%). The wind direction with the highest percentage is from 225° to 255° (13.15%). The recommended time for solo and mutual flight training for PPIC cadets is April to October.
Implementation of the Ziegler-Nichols Proportional Integral Derivative (PID) Method on Coffee Bean Roasting Machine Controls
PID control has been used in simple or complex machine control. Coffee is an agricultural commodity that is widely used as a food and beverage ingredient. Coffee bean roasting is required before it can be further processed (consumed). This research was conducted to create an automatically controlled coffee bean roaster using the Ziegler-Nichols type-1 PID method. This coffee bean roaster is made with a series of roasters, DC motors, servo motors, ESP32, thermocouple sensors, load cell sensors, ceramic stoves, and other supporting components. The bitterness variations of the coffee beans produced are "light" (3-5% moisture content), "medium" (5-8% moisture content), and "dark" (8-12% moisture content). The Ziegler-Nichols PID control is implemented on this machine to control the degree of rotation of the gas faucet servo motor on the stove so that the temperature in the roasting pan matches the specified set point. Based on the results of the research that has been done, the implementation of PID control was successfully carried out at the temperature set point used, 145 ̊C with a 7,2 KP value, a 0.034 KI value, and a 413.6 KD value. The research tools measurement’s average error was 0.32% for temperature, and 0.24% for weight.
Design and Development of Student Attendance Application Using Viola-Jones Methodand Haar Cascade Algorithm at UIM
The recognition of human facial images is one of the key technologies that continues to be developed. In the field of Computer Vision, it finds its applications in biometric recognition systems, search and indexing in digital video databases, restricted area access control systems, video conferences, human-computer interaction, and more. The Viola-Jones method is an object detection method known for its high accuracy of approximately 93.7%, and it is 15 times faster than the Rowley Baluja-Kanade detector and around 600 times faster than the Schneiderman-Kanade detector. The Haar Cascade Classifier algorithm is one of the algorithms used to detect a face. The Cascade Classifier is utilized in attendance recording with real-time face recognition, enabling the real-time recording of students.To enhance the abstract, it could be mentioned that to further improve the effectiveness and accuracy of face recognition systems, researchershave explored combining the Viola-Jones method with other techniques. For instance, the Haar Cascade Classifier algorithm can be combined with the Local Binary Pattern (LBP) algorithm, which preserves important information in images and performs well under low lighting conditions. By integrating these techniques, face recognition systems can achieve better results in classifying human heads, which are often the primary objects of interest in face recognition. Additionally, in conducting photo capture experiments using a camera, it is important to employ grayscale coloration, which retains the grayscale information in the images. Furthermore, capturing six photos during the process ensures more effective results and facilitates the assignment of unique IDs for easier data differentiation.