Load shedding is a protection scheme to maintain the stability of the electric power system. When there is an imbalance between the power generated and the load power, load shedding will release the load to restore power balance. This research aims to design and analyze the load shedding system at Private Company to see whether it is running well and meets the PRC-006-5 standard regarding the frequency operating limit, which must be in the range of 49.42 Hz to 50.58 Hz. The method that will be used in this research is to carry out testing with software and then analyze the power and frequency response due to the generator being removed from the system. The testing mechanism that will be carried out is to simulate the effect of a lack of power for the load supply on the load shedding system. From the research results, it is known that the existing load shedding scheme needs to be evaluated. Evaluation is carried out on steps 1 and 2, so that the load shedding limit for step 1 becomes 49.5 Hz and the pickup time for step 4 becomes 400 ms.

In this study, an analysis was conducted on a steam power plant system with a capacity of 2 x 7 MW based on coal. The coal fuel used by the majority of refined sizes is not in accordance with the recommendations of the American Society of Mechanical Engineers (ASME). The main objective of the study was to analyze the system components separately and to measure the exergy value of the components, covering the electrical energy so that it is known which equipment experiences the greatest energy loss as well as knowing the efficiency value of the equipment used. Efficiency and exergy are calculated using plant operation data. The results of the study found that the largest exergy destruction occurred in boilers, meaning that there was the largest energy loss in this section with a value of 37.34 MW (16.71%), while the destruction of the smallest exergy occurred in condensers of 0.58 MW (99.24%).

Angkasa Mart Store is currently experiencing a decline in sales for specific products, leading to the implementation of the Apriori Algorithm to create bundled offerings that combine less popular items with top-selling products, aiming to revitalize sales and promote the underperforming inventory. Following the CRISP-DM methodology, the study analyzes sales transaction data from June to July 2022, covering 65,892 purchased items, to extract ten critical association rules essential for devising bundled packages. The study's findings propose two strategies for package composition: first, the development of bundled packages comprising strongly related products, identified through comprehensive data analysis and positively received by the store; second, the introduction of 21 bundled packages consisting of products with a relatively weaker relationship, effectively expanding consumer choices and encouraging additional purchases within the store. By implementing the Apriori Algorithm and adhering to the CRISP-DM methodology, this study effectively formulates bundled product packages for Angkasa Mart Store, addressing the challenge of declining sales and contributing to an overall improvement in business performance and customer satisfaction.

The rapid development of information media in line with the presence of technology increasingly provides convenience for humans so that information or messages can be conveyed properly, quickly, precisely, and usefully. One of the technological developments that support information media is Virtual Reality (VR). Information Media related to Tanjungpinang City Tourism with the object of research in the form of the Gonggong Building as the Tanjungpinang City Tourism Information Center, which has the problem of stopping the function of the Building as a City Tourism Information Center due to damage. The purpose of this research is to implement Virtual Reality on the Gonggong Building with the output of the VR website of the Gonggong Building and the presentation of Tanjungpinang City tourism information content delivered by the Chatbot Tour Guide. The SDLC method used in this research is Prototype. The research results are a VR website for the Gonggong Building, which contains information related to Tanjungpinang City Tourism, namely Typical Culinary Destinations, Nature Tourism, and Melayu Traditional Clothing of the Riau Islands. The result of testing methods with 25010 obtained excellent results with Grade B on performance GTmetrix in testing the efficiency of the system in getting a response time of 5,8s fully loaded time page. From the reliability test results, a summary is obtained in the form of successful session 25964, failed session 0, successful page 25966, failed pages 0, successful hits 51932, failed hits 0, and other errors 0. These results, if expressed in percentage form, amount to 100%.

Inayah's car rental is one of the business sectors in the field of transportation services at Pekanbaru, Riau. Inayah car rental carries out management activities for car rental management that can be rented from daily to monthly. Management of rental transactions is currently done manually by recording customer data and storing customer guarantees in the archives that have been provided. Problems arise when the data is lost or damaged while the car is on the customer's side. In addition, other issues arise when a customer cancels suddenly on that day, or the customer's uncertainty about car rental will impact other customers who are serious about renting a car at that time. From these problems, we need a system that can automatically manage, store, and manage car rental transactions using Android. The development method in this study uses the prototype development method. The Prototype is a development method that involves users in system development. Based on the research results, we get a very good interpretation of the standard quality of the ISO 25010 system test, functional, performance, reliability, maintainability, security, usability, and efficiency.

This journal outlines a QoE network analysis conducted through both subjective and objective methods. The subjective approach involved the distribution of questionnaires via Google Forms to Riau University students using open access network, while the objective method utilized open access network in the Engineering Faculty Lobby and the Riau University Library, facilitated by the Google LightHouse tool. This analysis extended over a span of five days, encompassing morning, afternoon, and evening measurements, focusing on five web-based applications: YouTube, Facebook, WhatsApp, Instagram, and the Riau University Portal. The parameters assessed included Performance, Accessibility, Best Practices, and SEO. The QoE measurement results were presented in both tabular and graphical formats. The subjective method yielded a MOS value of 3.45, classifying it as "quite good." Meanwhile, when using the objective method in the open access network in the Lobby of the Faculty of Engineering, the average performance was 46.86, placing it in the "bad" category. In the UNRI Library location, the average performance was 48.2, also categorized as "bad." However, for other parameters, the average scores exceeded 50, falling into the "Fair" and "Good" categories.

This study investigates the conversion of mangrove wood charcoal into graphene using high voltage plasma technology through arc discharge. The experiment involves heating carbon with high voltage plasma generated from rod and plate electrodes. The variables examined are the electrode distance and carbon treatment time. The results demonstrate the successful conversion of mangrove wood charcoal into graphene. The generated plasma is influenced by the electrode distance, with a 1 cm gap producing stronger bluish-orange plasma. Varying the treatment time also affects the graphene yield, with a 3-minute treatment generating more graphene compared to 2 minutes, and 2 minutes yielding more graphene than 1 minute. XRD analysis reveals characteristic peak shifts indicative of graphene presence. SEM analysis confirms the graphene structure with porous features and sub-micrometer sizes. SEM images and diameter data further validate the successful conversion of carbon into graphene. These findings provide a foundation for the development of high voltage plasma-based production of graphene from mangrove wood charcoal. The utilization of a 10kV Neon Power Supply transformer enables the generation of high voltage plasma for the carbon-to-graphene conversion process. The electrode distance in the transformer plays a crucial role, as greater distances result in higher voltages, while shorter distances lead to lower voltages. This research significantly contributes to expanding the knowledge and application of graphene in various scientific and engineering fields. Moreover, the understanding of how electrode distance affects the generated voltage using a Neon Power Supply transformer is an important finding for optimizing the performance of this type of transformer.

An elevator or elevator is a means of conveyance found in high-rise buildings to make it easier for people to move quickly to the desired floor. Currently, the motor that is widely used as an elevator driver is a three-phase induction motor. The output of this three-phase induction motor is in the form of torque to drive the elevator. Of course, the number of passengers carried by the elevator has a different weight so that it will affect the power and torque generated by the motor to transport these passengers. The method used in this study was to collect data in the form of data on the number of passengers and data on lift motors at Madani Hospital by observation. Then after the data is obtained, measurements and calculations are carried out to obtain the torque, power and speed of the elevator motor. The results of this study are with a passenger load of 0 kg, 196 kg, 678 kg, 891 kg and 1,122 kg, when the elevator goes up the more the number of passengers, the greater the power and torque of the motor. The magnitude of the motor mechanical torque needed to move between floors is the same, if the distance between the floors is the same. The addition of passengers does not affect the speed of the elevator motor because the elevator moves constantly.

Laboratories usually have different tools, materials, documents, and a lot of other content. At the University of Riau, especially the Faculty of Engineering, it is filled with many laboratories. Starting with a computer network laboratory and chemical laboratory, machine laboratory, and many more. Currently information about laboratories cannot be found on the internet, and it is still difficult to access information about laboratories. This research focuses on creating a back-end system that can later be implemented in the development of a laboratory information system. This development process uses the V-Shaped model as a reference in the manufacturing stages. The system that has been made will be tested using the unit testing, integration testing, and system testing methods with ISO 25010 as a reference standard in determining the quality of the tests carried out. The results of testing the system obtained very good results with A results on reliability, maintainability, and security testing. In testing the efficiency of the system in getting a response time 80ms average on each page. White box testing also obtained results that all the features and data in the system were functioning and matched as they should.

QoS (Quality of Service) measurement of LTE (Long Term Evolution) networks is carried out using the Telkomsel provider. Measurements were made in Perawang, Riau at night. QoS measurements are carried out at Perawang to evaluate and monitor network quality in accessing vidio streaming services provided by the Telkomsel network in the Perawang, Riau. Measurements were aimed at 5 streaming applications, namely YouTube, RCTI+, Online Radio, Twitch, and Vidio. The reason 5 applications are used for QoS measurement is that these applications are popular applications used in the category of Vidio streaming applications. Measurements were carried out for 160 seconds. The measurement results will be analyzed for quality based on the TIPHON standard. The results were obtained by calculating the data that has been obtained by Wireshark. The data will be calculated using the existing equations. Twitch is the only application that has a value of four in the QoS parameter index category and has a QoS value with an excellent index category. 4 other applications have a QoS value with a good index category. This is due to the low value of the throughput index category. Online Radio and Vidio applications have an index category value of 0. YouTube and RCTI+ applications have a throughput index category value of 1 and 2 respectively. For jitter, packet loss, and delay values, 5 streaming applications have an excellent index category with a value of 4. The measurement results that have been obtained would be displayed in the form of tables and graphs.