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Methanol plant from glycerol is a good prospect in Indonesia. Until 2021, methanol is only supplied by one methanol producer located in East Kalimantan, namely PT. Kalimantan Timur with a production capacity of 660,000 tons/year. Therefore, the methanol plant from glycerol has a very important meaning for the acquisition of foreign exchange as well as employment. This article presents an economic evaluation of a methanol plant from glycerol with a capacity of 40,000 tons/year. Profitability analysis calculation is done by two methods, the method that do not consider the time value of money and the method that consider the time value of money. The results of the method that do not consider the time value of money obtained ROI value (before tax) 34.62%, ROI value (after tax) 24.24%, and the value of PBP 2.98 years. Using the method that consider the time value of money, the NPW value was Rp. 1,458 billion and the DCFRR / IRR was 39.25%. The sensitivity analysis also deserves to see the effect of the factor that influence the economic viability, and provide more information for the optimization of Methanol production.

Recognizing outstanding students is an essential strategy to encourage learners to improve their academic performance and overall learning quality. However, the process of selecting the best students at SMK Negeri 1 Raman Utara still encounters significant challenges due to the complexity of the evaluation criteria, which include academic achievement, attendance, participation in extracurricular activities, and student behavior. The current manual selection method is considered less effective because it is time-consuming and susceptible to subjectivity in decision-making. This study aims to address these issues by developing a technology-based Decision Support System utilizing the Simple Additive Weighting (SAW) method. SAW was chosen for its efficiency in solving multi-criteria problems through matrix normalization and preference weighting for each alternative. The development process includes requirement analysis, system design, and the implementation of an automated ranking mechanism for student candidates. Based on the testing results, the implemented system can process assessment data rapidly and produce accurate and objective rankings of high-achieving students. The system offers a practical solution for the school by enhancing transparency and validity in the selection process, minimizing human calculation errors, and supporting more equitable and data-driven decision-making.

Bookkeeping administration is an important aspect in waste bank activities because it has the benefit of recording and carrying out complete and detailed reporting within a certain time period, so that there are no differences in calculations between customers and the Waste Bank management. The importance of bookkeeping administration in managing the Waste Bank (recording the entry and exit of each type of waste managed by the Waste Bank), can help optimize waste management and increase the effectiveness of waste management. Simple bookkeeping (in the form of Socialization) was introduced in the transaction cycle at the Bank Sampah "Sami Berkah", Kelurahan Meteseh, Kecamatan Tembalang, Semarang (making a Chart of Account, Journal from proof of transactions, posting to the ledger and subsidiary books, up to making Financial Reports). The administrative management of the Bank Sampah Sami Berkah has met the minimum requirements of the Dinas Lingkungan Hidup, starting from books, officers, waste reception schedules, until the waste deposited has been sorted by customers/members. Likewise, the duties and responsibilities of waste bank management officers are in accordance with the job and description of the organizational structure. The proposed use of the information system at the "Sami Berkah" Waste Bank is the use of an Android-based application or web system (mobile web access) in order to accommodate the need for faster and easier information access for customers/Members and Waste Bank managers, as well as being able to overcome the Bank's operational problems. Waste starts from customer registration, savings transaction processes to reporting, efficiently and with integrity. and easy to manage by admins and monitored by users directly.

There are many taxpayers who have not paid their motor vehicle tax, even though the aim of the motor vehicle tax reduction program in Riau Province is so that taxpayers pay their motor vehicle tax after the tax payment period has passed. This research aims to see how effectively the motor vehicle tax reduction program in Riau Province has been running. The research method this time is using a qualitative research method. The reason the researcher used a qualitative research method was so that the researcher could see and analyze the extent to which the effectiveness of the motor vehicle tax reduction program in Riau Province was running. The theory in this research uses Mahmudi's effectiveness theory which consists of quality, quantity and time. The results of this research are that the motor vehicle tax whitening program that is already underway in Riau Province cannot be said to be effective. According to calculations, the number of vehicles that are in arrears in their motor vehicle tax payments is around 1 million vehicles and so far those who have utilized the motor vehicle tax whitening program in Riau Province are around 390 thousand motor vehicles. With this number of vehicles, researchers can conclude that less than half of the number of motorized vehicles in Riau Province have paid their motor vehicle tax which is in arrears. Of course, the hope is that the vehicle tax reduction program in Riau Province can make people aware of their tax obligations, where this program also exists to relieve people because they no longer need to pay administrative tax fines, they just have to pay the principal tax.

The research was conducted with the aim of knowing the effect of serialized image media on the achievement of cognitive development of children aged 5-6 years at TK Harapan Kita Yadika, Labuhanbatu Selatan Regency. His study used a type of experimental research with a Quasi Experiment design in the form of The Equivalent Time Sample Design. The study population consisted of all children aged 5-6 years at TK Harapan Kita Yadika Kindergarten as many as 2 classes. The sampling technique used simple random sampling technique with the consideration of taking one group randomly, namely Melati 1 class which amounted to 18 children. This research variable consists of independent variables, namely serialized images and dependent variables, namely the achievement of children's cognitive development. Data collection techniques using observation with observation sheet instrument. The data were analyzed using non-parametric statistics by means of the wilcoxon test with a real level of α = 0.05 with a critical value of 40. The results showed that there was a significant effect of serialized image media on the cognitive development outcomes of children aged 5-6 years at TK Harapan Kita Yadika South Labuhanbatu Regency. With the results of statistical calculations where the hypothesis test results show Jcount of 54.5. The hypothesis testing criteria used are the real rate α = 0.05, with dk = n-1 obtained Jtable of 40, so it can be concluded that Jcount (54.5) > Jtable (40). This means that Ha is accepted and Ho is rejected or means that serialized image media has a significant effect on the achievement of cognitive development of children aged 5-6 years at TK Harapan Kita Yadika Kindergarten, Labuhanbatu Selatan Regency.

Infrastructure development in Jombang Regency has increased, after the city returned to normal from the Covid outbreak over time. The natural gem subsidized housing project was built on an area of ​​7,410 m2. This landed house was built with Type 30/60 with a total of 71 housing units. This project was built by PT SAMI KARYA. In this research, data collection was obtained from developers such as weekly reports, daily reports, work schedules, RAB, and actual costs. In 2023, demand for houses in Jombang Regency will increase drastically because there are still many people who need a place to live. The methods used are Return of investment, Internal rate of return and Benefit cost ratio. The ROI calculation method is concluded to be still in profitable status as a long-term investment and can be used to invest in subsidized housing development projects with an ROI value above 16.19% as a return on investment parameter, but after carrying out a trial calculation, a profit value of 389 is obtained. % and of course achieve, even exceed the target.

Sanoi Village and Ronggaiwa Beach are villages that are located in Waropen District and are part of the province of Papua. Along the Sanoi Village Road and Ronggaiwa Beach is a road that runs along the coastline and is an accessibility route between villages and the logistics of maritime transportation which is an economic route of the Waropen District Government so abrasion handling must be carried out immediately. The study examines the extensive calculations and advance backward coastline and also the exploitation of the local wisdom of the community as an abrasion countermeasures.The research methods used to the objectives of the study are quantitative descriptive methods, spatial analysis, time series analysis and analysis of local intelligence indicators. Quantitative deskriptive analysis is by displaying field images and presenting width changes in coastlines and coastline backward velocities throughout 2012, until 2022. Spatial analyses using ArcGIS software and field observations. Time series analysis to observe the changes in the width and backward speed of coasts by looking at the 2012 image, up to 2022. Local intelligence indikator analysis is an analysis that identifies the local abilities that communities use in performing abrasion backwardness. The results of the research showed that there was a wide change of coastline and the rate of reversal of the coastal line along the year 2012 to 2022, in which four years once counted the area of blood abrasion and the speed of retrocession of coastal lines. Based on the results of observations found that the change in coastalline occurred due to the magnitude of abrasions that occurred in Sanoi Village and Ronggaiwa Beach. However, with the knowledge of local wisdom that the community possesses, it can prevent and control abrasion by using the environment to form the traditional talud that is often referred to as the local community with the name Talud Rufia.

Artificial food additives pose significant health risks to Gulf Cooperation Council (GCC) citizens despite regional authorities' extensive medical, legislative, and technological efforts. Literature highlights the detrimental impacts of these additives, including malnutrition, digestive disorders, respiratory problems, skin issues, hives, nausea, diarrhea, shortness of breath, allergic reactions, high blood pressure, and tumors. The research project at hand aims at becoming the first official and comprehensive mobile application of its own in the GCC region that manages the calculation and demonstration of an up-to-date health and legal knowledge base of the impacts of artificial additives, enhances the awareness, automatically recognizes the artificial additives, and provides alternative solutions, for both android and IOS mobile platforms. This research project introduces "Weqaya," a pioneering mobile application designed to manage, educate, and raise awareness about the effects of artificial additives. Weqaya provides real-time health and legal information, identifies additives, and suggests alternative solutions for Android and iOS platforms. The project employs an Agile-based SDLC model to explore, develop, and evaluate the food additive phenomena in Weqaya. The application's usability evaluation scores a promising 95.21%, indicating its potential utility for GCC health ministries, dietitians, academics, researchers, and food producers in enhancing knowledge and promoting non-artificial food options.

At this time technology can no longer be avoided, various sectors can take advantage of it, including the education sector. The way that can be utilized is by using learning media during the learning process because it will create a comfortable, enjoyable and interesting atmosphere to obtain maximum results. The aim of this research is to explain and identify the influence of using audio-visual learning media on vocational school student learning outcomes. This research aims to determine the effect of audio-visual learning media on vocational school student learning outcomes. To get what is desired, a quantitative research approach is used with experimental types and a Quasi Experimental research design. Data is calculated using statistical calculations (SPSS). In this research, simple linear regression analysis and t test were used. Testing the hypothesis with the t test obtained a t count value of 10.733 it means t hitung > t table (10.733 > 1.699) and significance (0.000 < 0.05) so it can be concluded that there is an influence of Audio Visual Learning Media on Vocational School Student Learning Outcomes.

The WISN method is a resource management tool that calculates staff needs based on workload for certain staff categories and clearly the facility and type of health facility. This tool can be applied nationally, regionally, in health facilities, namely it is easy to use both technically, comprehensive, realistic and makes it easy to determine variations in human resource needs in various types of health services such as community health centers and hospitals. The aim of this research is to analyze the need for nursing staff based on workload using the Workload Indicator Staff Need (WISN) method in the Inpatient Room at RSUD dr. R.M. Djoelham Binjai in 2023. The research design used was descriptive research using observational techniques. The population in this study were all nurses in the Inpatient Room at RSUD dr. R.M. Djoelham Binjai, numbering 61 nurses, this population sampling was carried out using purposive sampling. The number of samples to be studied was 61 people. Data analysis was carried out using the WISN analysis. After the data was obtained from filling out the questionnaire by the researcher based on observations, recording and adjustments were made to the work documentation carried out by the nursing staff in the Inpatient Room. The results of research based on WISN method calculations show that the need for nursing staff in the Inpatient Room at RSUD dr. R.M. Djoelham Binjai still lacks 3 nursing staff. The conclusion was that there was an influence between working time, activities of nursing staff, workload standards, slack factors and calculations of nursing staff needs for nursing staff on the need for nursing staff in the Inpatient Room at RSUD dr. R.M. Djoelham Binjai, it is recommended that the Head of the Inpatient Room need to evaluate the division of tasks so that the nursing service process can be carried out well and improve the quality of service in the Inpatient Room at RSUD dr. R.M. Djoelham Binjai

PT KHI is a company operating in the food and beverage industry in Indonesia. In production activities there are many factors that can hinder performance productivity. Worker productivity is a value that cannot be seen directly except through a calculation process, so the worker productivity value is calculated from the company PT KHI. This research was carried out in the Production department using the Time and Motion Study method with a Lean Manufacturing approach, namely waste or extravagance to increase labor productivity in the Production department area. This time it was carried out directly by means of field observation. So that primary data is obtained. The results were obtained in the form of recommendations for improvement, namely: adjusting the total headcount in the line F area from previously 7 headcounts to 6 headcounts and moving several tasks from the carton sealer operator to each operator in the packing area of ​​line F, then classifying them into 3 headcounts for the packing section and 3 headcounts for the packing section. . It can be concluded from the results of this research that one type of waste is eliminated, namely adjusting the number of operators in the packing line F area so that before the improvements, labor productivity is 71.71% on line F and after labor productivity is 83.63%. By making improvements, cost savings of IDR 4,515,133 were obtained for 26 working days.  

Sprite drink is a soda drink that is very popular among all groups. Demand is uncertain and always changes from time to time, making product availability difficult to control and often causes overstock or stockout problems. Therefore, inventory control is needed, which can be done by forecasting, determining safety stock and good re-order points. To obtain effective and efficient planning, the number of orders must be based on the number of past mass requests so as to reduce the occurrence of overstock or stockouts. With the problems experienced by PT. XYZ, the forecasting method used is the time series forecasting method. In this case, the time series methods used are Simple Average, Single Moving Average and also Single Exponential Smoothing. After carrying out several calculations, we obtained a Mean Absolute Centage Error (MAPE) value of 49.379%, a Mean Absolute Deviation (MAD) of 2297.145, a Root Mean Squared Error (RMSE) of 2912.495 and also a Mean Squared Error (MSE) of 8,482 .628 and forecasting results of 4504 pcs every month. Based on the calculation results, the proposal given is to reorder Sprite 250ML when the inventory in the warehouse reaches 1548 pcs with a safety stock of 540 pcs.

Company PT. PAL Indonesia is a manufacturer of Indonesian Defence system equipment which is especially in the largest marine sector in Indonesia. In addition, PT. PAL Indonesia has 22 divisions. One of them is the Technology & Quality Assurance Division. One element that requires precise and accurate measurement is calibration. In the operational balance the calibration process is the key to overcoming the calibration request in the department. This research uses the line balancing method to determine the process time from the beginning to the end of the calibration process. The results obtained from the balance delay method are line balancing methods, in the previous company condition of 77% and after the improvement has been reduced to 5%, it can be concluded that the balance delay has decreased so that the performance is better. Meanwhile, in the Smoothness Index, the results that are known in the company's previous condition are 9 minutes and the results obtained after the repair are 3 minutes with the position weight method (Ranked Positional Weight) getting the late operation speed is 160 minutes so that it is used as a cycle time in the calculation of this method in the process of knowing the calibration work from the beginning to the end.

XYZ is one of the largest manufacturers of bus houses in Indonesia as a safe and reliable means of transportation with almost 50 years of experience. In carrying out the production process, employees are required to always be optimal in completing their work, but on the other hand, employees have limited workloads. The aim of this research is to determine the workload conditions received by Salvagnini CNC Laser machine operators, as well as to provide suggestions for improvements to the preparation department (Salvagnini). In order to find out the workload conditions for operators from this department, workload calculations are carried out using the FTE (Full Time Equivalent) method which is obtained from observing job descriptions, units of output or types of activities produced by operators (units/activities), vol-umes containing the number of production results. , as well as the duration of work carried out by the operator. The operator's workload conditions on the first and third days were FTE values of 0.671 and 0.949 (underload) because the FTE value was <0.99, while on the second day the workload condition was 1.033 (fit) because the FTE value was between 1-1.28.

UPT SMPN 34 Gresik is one of the educational institutions that faces challenges in managing teacher attendance and salaries efficiently. Because UPT SMPN 34 Gresik currently still uses manual recording of teacher attendance, so it takes quite a long time. To overcome this problem, the researcher proposes creating a web-based Teacher Attendance System using the Waterfall design methodology with a MySQL database. The aim of establishing this web-based teacher attendance system is to assist teachers in carrying out attendance attendance efficiently and assist educators and teaching staff in managing teacher salaries based on attendance better. The need for an inclusive teacher attendance system, and the need for optimal salary calculations at UPT SMPN 34 Gresik are resolved through this research. From the conclusions obtained from the process of observation, interviews and literature study, this web-based teacher attendance system is expected to increase the efficiency of human resource management in the education sector. Researchers hope to provide comprehensive and sustainable answers to the needs of UPT SMPN 34 Gresik.

Developing countries tend to experience inflation, countries with inflation rates of less than 3% are still achieving normal standards, while countries with high and unstable inflation experience economic instability. increase in prospects. A general and continuous decline in the price level of goods and services in a country leads to higher levels of poverty and unemployment. This study uses quantitative methods using time series data collected between 2016 and 2020 and statistical calculations using SPSS. The results showed that the inflation rate was 3.532> t table 2.306 and the significance level was 0.039 < . 0.05, which means that inflation affects Indonesia's economic growth / Growth Domestic Product (GDP).

By using Times Series data from 2017 to 2022, this research aims to analyze and understand the impact of investment and labor variables on the GDP of Binjai City. A quantitative approach was used in this research by utilizing data from two sources, namely the Central Statistics Agency (BPS) and NSWI. The method applied is ordinary least squares with the classic assumption test, as well as data processing using E-Views 12 software. The research results show that investment has a probability value of 0.92, which is much greater than 0.05. This is supported by the t-calculation value, which is smaller than the t-table (-0.108876 < 3.18245), which indicates that investment has a negative and significant impact on the GRDP of Binjai City. Meanwhile, the labor value is 0.55 > 0.05, indicating that labor has a negative and significant impact on the GDP of Binjai City, as reflected in the comparative value of t-count and t-table (0.666775 < 3.18245). Furthermore, when the two variables are evaluated simultaneously, the F probability value of 0.670525 is greater than 0.05. This indicates that, together, these two variables do not have a significant impact on GRDP in Binjai City.

Analysis of liquidity ratios shows that the company is in quite good condition in meeting its short-term obligations. With a current ratio in 2020 of 8.57 times, in 2021 of 7.41 times and in 2022 of 0.1 times. The quick ratio in 2020 was 8.57 times, in 2021 it was 7.41 times, and in 2022 it was 0.1. The cash ratio in 2020 was 822%, in 2021 it was 718%, and in 2020 it was 4%. Solvency ratio analysis shows that the company fulfills all its obligations in good condition. The Debt to Asset Ratio in 2020 was 12%, in 2021 it was 13%, and in 2022 it was 70%. Debit to Equity in 2020 is 13%, in 2021 is 15%, and in 2022 is 24%, Long Term Debt to Equity Ratio in 2020, 2021 and 2022 cannot be analyzed due to the unavailability of long-term liabilities. Profitability ratio analysis shows that the profit margin calculation results in 2020 are 11%, in 2021 they are 23%, and in 2022 they are 11%. Net Profit Margin in 2020 will be 8%, in 2021 it will be 10%, and in 2022 it will be 6%. Return on Investment in 2020 will be 15%, in 2021 it will be 29% and in 2022 it will be 31%. Return on Equity in 2020 was 17%, in 2021 it was 34%, and in 2022 it was 104%.

A network is a system in which computing devices are connected to each other and can share data and resources. To establish a connection, these network devices follow certain rules called communication protocols, both through physical and wireless technology. The performance level of a Wi-Fi network, for example inside a building, can be measured by how well users receive the Wi-Fi signal. The goal of this network is to establish timely and precise communication between users and data senders. A successful Internet connection often depends on receiving a strong and consistent signal, while a fluctuating or weak signal is undesirable. A commonly used approach to measure the average Wi-Fi signal level in a building without needing to understand every detail of the building layout is to use Single Slope Modeling (1SM). This model bases its calculations on the distance between the sending and receiving devices, so it can be used to analyze the performance of Wi-Fi networks, as is done in the case of educational institution buildings. Apart from that, in an effort to optimize network performance, a genetic algorithm was also created which was implemented using the PHP language. This algorithm is based on the principles of genetic algorithms to overcome optimization problems that may arise in the context of such networks.

Background. Non-contrast head CT scans utilizing X-rays are considered the gold standard in emergency units for patients with clinical head injuries. Rotation time is a parameter that influences the radiation dose received by patients. This study aims to evaluate the impact of rotation time on patient radiation doses, emphasizing the ALARA principle. The research findings can assist in optimizing CT scan settings to reduce radiation doses without compromising image quality.. Methods: This quantitative research employs an experimental approach to investigate the influence of rotation time variations on CTDI (CT dose index) and DLP (dose leght product) in non-contrast head CT scans. Results: Calculation of CTDI and DLP values to assess the impact of rotation time variations, using two variations, 1 s and 1.5 s, yielded the following results: CTDI and DLP for 1 s were 20.30 mGy and 239.54 mGycm, respectively, while CTDI and DLP for 1.5 s were 20.43 mGy and 249.26 mGycm. Conclusion: Rotation time variations affect CTDI and DLP values in non-contrast head CT scans, although both values tend to remain stabel. A rotation time of 1 s is considered optimal for CTDI and DLP in non-contrast head CT scans at the Radiology Department of Sunset Vet Kuta Animal Hospital.