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Medan is one of the metropolitan cities that has many offices, schools and colleges, this has resulted in most residents of Medan City being required to sit continuously and be less mobile in working and studying. Sport is one activity that can be done to overcome this. Therefore it is necessary to build a recreational sports arena in the city of Medan which can be used every day according to the user's schedule and which can accommodate activities or matches held by certain communities or parties. This sports arena was designed with a metaphorical architectural approach, to show an attractive building visual and increase the interest of the people of Medan City to exercise in this building.      

Overhead cranes are an important device in the manufacturing and construction industry that functions to move heavy loads efficiently and safely. However, human error often occurs which can cause work accidents, equipment damage, and decreased productivity. Therefore, this research aims to design and build an Arduino-based automatic overhead crane system that can increase work efficiency and safety. This system is designed using an Arduino microcontroller as a control center, equipped with an ultrasonic sensor to detect the position and distance of the load, as well as a servo motor to regulate crane movement automatically. The system also features a wireless communication module to monitor and control the crane remotely. The research method used is Research and Development (R&D), which includes the stages of needs analysis, system design, hardware and software implementation, and performance testing. Test results show that this automatic overhead crane is capable of moving loads with high accuracy and a speed that can be adjusted according to needs. The system also succeeded in reducing manual intervention, thereby increasing work safety and reducing the risk of accidents by up to 30% compared to manual systems. The Arduino-based automatic overhead crane design succeeded in meeting the research objectives, increasing work efficiency and safety. Routine maintenance and periodic checks on mechanical and electronic components need to be carried out to ensure the system continues to function optimally and reduces the risk of damage.

The Medan city is one of the largest cities in Indonesia with many economic and tourist activities. The Medan city is one of the gateways for Indonesian businessmen and tourists, especially in North Sumatra. This requires an accommodation that can be a lodging solution for business people and tourists who are doing temporary interests in the city of Medan. This has the potential to design a hotel as a temporary lodging solution for business people and tourists in the city of Medan. The hotel design uses problem solving methods that are focused on solving existing problems, starting from the formulation stage, data collection, analysis to synthesis using survey techniques, literature studies and comparative studies. So that through the design of this hotel, it can be the right lodging solution in the city of Medan with a Tropical Architecture approach that is able to provide comfort for users. Hotel design pays attention to the availability of infrastructure and utilities to support human needs in a design that is able to adapt to the surrounding environment.

The reliability of a data center is highly dependent on its air conditioning and cooling system. This research evaluates the existing cooling system of Universitas Krisnadwipayana’s data center using the PPDIOO Network Life-Cycle approach. The study finds that the current cooling system, which relies on AC Split, fails to meet TIA-942 standards, posing significant overheating risks and increasing downtime probability. Observational analysis shows that the cooling distribution is inefficient due to inadequate airflow and the absence of a structured cooling layout. To address these issues, this research proposes an optimized cooling system design that incorporates Computer Room Air Conditioning (CRAC), hot aisle-cold aisle arrangement, and raised floor implementation. The recommended improvements also include installing temperature and humidity sensors for real-time environmental monitoring and implementing N+1 redundancy for enhanced system reliability. These solutions are expected to improve cooling efficiency, reduce energy consumption, and mitigate downtime risks. Future research should focus on evaluating the practical impact of this design by conducting real-world trials and exploring liquid cooling technology as a potential alternative for further efficiency improvements.

Flood disaster is the most frequent disaster in Indonesia. Based on BNPB records throughout 2021, flood disasters have occurred 1,279 times. Poor drainage system can be one of the factors causing flood disasters. Way Mhorock Village, Abepura District is one of the areas that has poor drainage network quality. This is because Way Mhorock Village is one of the centers of community activities, so it has the potential to cause flooding. This study examines the quality of the drainage system against disasters in Abepura District by focusing on Way Mhorock Village. The research methods used to achieve the objectives in this research are qualitative methods, spatial analysis, and analytical hierarchy process. Qualitative descriptive analysis method to assist and describe the actual drainage problems in the field in the form of pictures. Spatial analysis method using GPS by recording problematic drainage points then processed using ArcGIS software. Analytical Hierarchy Process method by capture the perspective of stakeholders from the agency to determine the assessment of the quality level of the drainage system that has the potential to cause flooding in Way Mhorock Village. The results showed that there are 4 problems that affect the quality of drainage in Way Mhorock Village, namely drainage sedimentation, land use change, drainage cross section, and the volume of waste found at 33 points in Way Mhorock Village. Based on the results of the analytical hierarchy process using an expert choice application, drainage sedimentation is the most influential criterion on improving drainage quality with alternative handling provided in the form of law enforcement policies against environmental violations by the community.  

Push Up is a physical activity carried out by individuals that aims to strengthen the muscles of the body, namely the muscles of the arms, shoulders and chest. Designing an IOT-based detection and monitoring system with the aim of making it easier for tool users to know the number of repetitions and the number of calories used automatically. Detectoring with the help of four proximity sensors to detect motion when doing push-ups and monitoring using an android application made specifically for the device. The component used is NodeMCU ESP8266 as a microcontroller. The parameters displayed in the application include a column of push-up repetitions, a column for the number of calories used, and a graph of increasing push-up repetitions. The tool testing method was carried out 15 times for data collection with 20 push-up repetitions for each data collection. The results of the test, obtained an error percentage of 1.33%. So that this tool can help users to monitor the repetitions that have been done and find out the amount of calories used.

This study aims to analyze the community's preparedness in facing natural disasters in Tegaltirto Village through indicators that include preparedness, vulnerability, and social resilience. Based on data collected through surveys and field observations in several hamlets, the analysis is conducted using data on preparedness values, vulnerability, and social resilience to provide an overview of how ready the community is to face natural disasters. The results of this study are expected to provide recommendations for improving community preparedness for natural disasters and contribute to disaster mitigation planning in the field of civil engineering.

During the field work practice, the author observed that there were obstacles in placing pedis examinations on non-cooperative patients so that the examination was not optimal. This obstacle resulted in radiologists not being able to carry out their expertise properly. In addition, if the referring doctor asks for a repeat photo, it will give the patient an excessive radiation dose. With such patient conditions, a fixation device is needed so that the examination produced optimal results. Innovation efforts are needed to overcome this in order to improve services and prioritize patient safety. In addition, according to Lampignano & Kendrick, (2018), it is not permissible to force injured limbs or body parts into a certain position, the position must be adjusted according to needs. So that patients with multiple fractures require special treatment that is different from patients in general. The researcher designed a fixation device that can be used in the patient's supine and sitting positions without having to lift the patient's thigh, genu, and cruris bones and also without looking at the size of the patient's feet.

In the digital era, online buying and selling transactions are increasing, so that shipping services have an important role. However, there are various problems in package delivery, such as loss or damage due to the absence of the recipient at the location. This study aims to design and build an IoT-based Smart Box that allows safe package receipt. This system is equipped with a keypad, ultrasonic sensor, load cell sensor, and ESP32-CAM for automatic image capture and sending notifications to users via Telegram. Tests were carried out on various aspects of the system, including sensors, IoT connectivity, and package storage security. The test results show that the tool can function well in securing packages and providing real-time notifications to recipients.

Socks are essential daily wear that require special care, including an effective drying process to prevent unpleasant odors and the growth of bacteria and fungi. Conventional drying methods often face challenges, especially in high-humidity environments or during unfavorable weather conditions. This study aims to design and develop a prototype sock dryer that is more efficient and hygienic. The prototype utilizes a combination of a heater, UV lamp, and humidity and temperature sensors to ensure optimal drying without damaging fabric fibers. A microcontroller-based control system using Arduino Uno is implemented to regulate device operation and monitor sock conditions during drying. Testing results indicate that the device effectively dries cotton socks in damp conditions faster than conventional methods. Additionally, the sterilization feature with a UV lamp helps reduce the risk of microbial growth. This innovation is expected to provide users with a practical, hygienic, and efficient way to dry socks without depending on weather conditions. Further development can be carried out to enhance drying capacity and energy efficiency.

WebGIS is a web-based Geographic Information System consisting of several interrelated components. WebGIS is a combination of graphic mapping design, digital maps with geographic analysis, computer programming, and a database that are interconnected into one part of web design and mapping web. WebGIS is a GIS application distributed in a computer network to integrate and disseminate geographic information visually on the world wide web. The objectives achieved in this study are to identify the types of tourism distribution on Sipora Island, Mentawai Islands Regency and to design and build a tourism object information system on Sipora Island, Mentawai Islands Regency based on webGIS. From the research conducted, it can be concluded that based on the survey results, there are 22 points. Waterfall tourism consists of 7 tours, cultural tourism consists of 2, beach tourism consists of 8 and marine tourism consists of 5. Where the tourism is spread across 2 sub-districts. Where in the North Sipora sub-district there are 15 points and South Sipora 7 points. Design and Build a tourism information system for Sipora Island, Mentawai Islands Regency using Quantum GIS as initial data processing. Then combined with a website that has been designed using the Visual Studio Code application.    

To meet the needs of safety and comfort within the Faculty of Engineering, Cenderawasih University, the campus has provided a fairly adequate parking area. With the parking area that is already available, it is necessary to conduct an analysis of the need for parking areas within the Faculty of Engineering, in order to arrange vehicles that are neater, safer and more comfortable. The formulation of this research problem is in the form of existing parking conditions, parking characteristics, and ideal parking lot capacity. This research aims to identify problems, analyze characteristics, and determine the size of Parking Lot Units. The benefits of research for reference materials, input to local governments related to parking solutions. Make a calculation of the parking lot capacity. The limitations of the research problem, which was carried out in the parking lot of the Faculty of Engineering, Cenderawasih University and the number of parking lot capacity, Calculating the capacity of the type of motorcycle and car vehicles, the survey was carried out on 3 (three) active working days, namely Monday. Wednesday, and Friday for 3 (three) weeks. This research method uses a quantitative approach with a survey type of research. With this research, it is hoped that the Faculty of Engineering, Cenderawasih University can provide adequate parking lots.

PT X, one of the state-owned enterprises to support the country's food security, is the largest and most comprehensive fertilizer producer in Indonesia that generates various wastes, including industrial liquid waste. Liquid waste has no economic value, so it is very important to treat it. PT X Company uses potential Hydrogen (pH)ysical and chemical treatment. There are two effluent treatment units, setting, line injection, and sludge treatment. All parameters evaluated include chemical requirements for oxygen (COD), zat padat yang tersuspensi(TSS), ammonia (NH3), total kjehdal nitrogen (TKN), fluorine, degree of acidity (potential of hydrogen (pH)), oil, and fat. According to the results after the analysis conducted in the study, it was found that the air pollution data after wastewater treatment was carried out showed that the quality of wastewater every month had met the quality standards of the rules and could be discharged into water bodies / seas. This shows the effectiveness of the treatment process implemented by the company.

PT X is one of the industries located in East Java that produces liquid waste. The industrial sector is indeed a large producer of liquid waste. One of the liquid wastes produced is domestic liquid waste. The industry has the responsibility to manage domestic liquid waste in accordance with Government Regulation Number 22 of 2021 which requires industries to carry out domestic wastewater management before being discharged into water bodies. One of the efforts made by the industry to manage the domestic wastewater produced is to use a Domestic Wastewater Treatment Plant. The quality of the treated water has met the domestic wastewater quality standards to be discharged into river and does not pollute the environment.

PT X is an iron industry in Sidoarjo that produces Hazardous and Toxic Material waste. This industry has several Temporary Shelters (TPS) for B3 waste to store its waste. However, supervision based on the regulation of Permen LHK no. 6 of 2021 shows that there are several inconsistencies in B3 waste management and waste storage procedures. This study was conducted to evaluate and determine the correct management of B3 waste, as well as to correct the inconsistencies identified in the SKPL supervision program.

Management of Hazardous and Toxic Waste (B3) is an important aspect in supporting sustainable development while minimizing negative impacts on the environment. This research evaluates B3 waste management at PT. Z, a construction company that plays an important role in the production and maintenance. Evaluations are carried out on technical and non-technical aspects, including waste identification, temporary storage, transportation, and compliance with regulations such as PP Number 22 of 2021 and other related regulations. The research method uses a quantitative and qualitative approach, with primary data obtained through field observations, interviews and documentation, while secondary data includes SOPs, waste balances and logbooks. The analysis was carried out using a checklist and scoring method based on the Guttman scale to assess the level of compliance of B3 waste management with regulations. The research results show that B3 waste management at PT. The Z already meets most technical and regulatory standards with some aspects requiring improvement. This research is expected to provide an overview of the conditions of B3 waste management at PT. Z as well as relevant recommendations to increase management effectiveness, support regulatory compliance, and encourage the achievement of sustainable development goals.

This study explores the potential utilization of phosphoric acid sludge and ZA II lime waste as raw materials for the production of SP-15 fertilizer, which is essential for enhancing agricultural productivity and addressing environmental issues related to waste disposal. The research aims to analyze the phosphorus content (P₂O₅), moisture levels, sulfur (S), and calcium oxide (CaO) in the raw materials and the final fertilizer product. Methods employed include sampling, gravimetric analysis, and spectrophotometry. The findings indicate that phosphoric acid sludge contains an average P₂O₅ content of 33.05%, making it a potential phosphorus source for fertilizer production. Additionally, ZA II lime demonstrates good hygroscopic properties. This research concludes that utilizing these two wastes can not only reduce reliance on chemical fertilizers but also provide economic benefits to farmers and support sustainable agriculture. The implications of this study highlight the need for further research to optimize waste processing techniques and enhance community awareness regarding waste management.

The purpose of this study is to determine the handling of b3 waste by the soft drink industry. The research method used is to compare the local situation with current regulations. The comparison is carried out using a guttman scale where if it is appropriate, a score of 1 is given and if it is not appropriate, a score of 0 is given. The source of B3 waste generated by the soft drink industry comes from maintenance activities, laboratories, offices, and transportation. The type of hazardous waste comes from category 1 general specific sources, namely expired chemicals from laboratories, while from non-specific sources in the form of hazardous contaminated waste, waste from laboratories containing hazardous substances, and used batteries. Then there are category 2 general specific sources in the form of used toner, while from non-specific sources in the form of electronic waste, used B3 packaging, used cloth, used lubricating oil, and residual ink. The characteristics of B3 waste produced include toxic, flammable, and corrosive. In the transportation of B3 waste, the Sidoarjo Regency Soft Drink Industry has collaborated with third parties. Based on the results of the analysis of B3 waste management in soft drink industry companies classified in the “good” category. However, there are still things that need to be improved in the management of B3 waste in the form of applying symbols and labels, packaging, and storage.

Leaf springs are one of the suspension systems that are still widely used in various modes of transport such as cars and trucks. The spring functions to support the load and reduce vibration from operational activities. This study aims to analyse the bending strength and hardness of steel leaf springs of trucks and cars resulting from tempering heat treatment. The three point bending method was used as the flexural strength testing method and the Rockwell C Hardness method testing was used for hardness testing with leaf springs in raw, tempered 460°C, and tempered 510°C conditions. From the results of the study, the highest average bending strength value of 3733,55 MPa was obtained and an average roughness value of 31,8 HR was obtained for the 510°C tempered truck leaf springs. This also applies to the 510°C tempered car leaf springs, where the average bending strength value obtained is 3392,65 MPa and the average hardness value obtained is 29,5 HR. Thus, it is recommended that tempering heat treatment that can be applied to truck and car leaf springs be carried out at 510°C to increase the bending strength and ductility of the leaf springs.

A lifter is a device used to lift and move objects or materials from one place to another. Lifters are commonly used in the industrial world, examples of lifters are forklifts, cranes, stackers, drum lifters and hydraulic lifters. A lifter is a device used to lift and move heavy objects such as wooden pallets, boxes, or other industrial goods. One of the important components of a lifter is the handle which functions as a hand grip to move the lifter. A lifter handle is a handle or hand grip to push a lifter. The right material to use as a handle lifter is SS400. SS400 (Structural Steel) is a low carbon steel (mild steel) that complies with ASTM (American Society for Testing Materials) A36 or JIS (Japanese Industrial Standards) G3101 standards. The Handle Lifter manufacturing process includes the cutting process, namely cutting from an initial length of 6 meters to 150mm. The milling process is cutting lengths and thicknesses with a length of 135mm with a first thickness of 13mm, a second thickness of 15mm and a third thickness of 13mm. Drilling process, where this process involves making a hole with a diameter of 10mm. The grinding process is a finishing process that aims to smooth uneven surfaces. And finally, Quality Control is carried out to check whether or not the goods being produced are suitable. Based on the calculation results, the productivity value for making Handle Lifters in 1 day was obtained, where the working hours used were 8 hours, resulting in 17 Handle Lifters.