Publication Search

The research was conducted directly at the Pertamina Hulu Mahakam CPU Tambora Samarinda Company. The problem in this study is how to control the quality of wastewater and what factors affect the quality of wastewater in the PHM CPU Tambora Samarinda area, while the purpose of the study was to determine the control of wastewater quality and determine the factors that affect the quality of wastewater. Wastewater sampling was carried out in bottles for 31 days at 06.00 am and then sent to the laboratory for analysis of oil content in wastewater. The method used is the control map approach and fish bone diagram. The results of the study showed that the quality of wastewater was still within the standard quality limit of 12.5 ppm (still below the maximum standard of 40 ppm) and the dominant factor affecting the quality of wastewater was the equipment factor, namely due to damage to the pump

Mahakam Working Area (WK Mahakam) is one of the largest oil and gas working areas in Indonesia managed by PT Pertamina Hulu Mahakam (PHM). WK Mahakam has large gas reserves, making it one of the largest contributors to national gas production. This study aims to determine the process of gas well production and know the technology used in the gas production process and know the efforts in increasing gas production in the Mahakam working area. The methods used are direct observation, interviews and literature studies. The results showed that the gas well production process consists of several stages, namely drilling, pipe installation, and gas processing.The technology used in the gas well production process includes directional drilling technology, horizontal drilling technology, Artificial Lift technology and Enhanced Oil Recovery technology. The efforts made by the company to increase gas production include exploration of new gas wells, development of gas production technology, improvement of production production, development of Artificial Lift technology, Enhanced Oil Recovery technology, a n d worker skills and implementation of digital technology.

PT. Gemilang Sejahtera Abadi (GSA) is a company engaged in the oil palm plantation business, which is spread across the East Kutai Regency, precisely in Long Mesangat District. It is still difficult for office admins to monitor plantation results and production results by relying on paper records, via telephone and SMS, making it difficult to understand palm oil production data. The computerized system used when the research was conducted still used Microsoft Excel and Microsoft Word. The purpose of this study was to create a web-based Monitoring Information System Design application for the PT. Gemilang Sejahtera Abadi office admin. The method used is the Waterfall method which consists of 5 stages, namely: communication, planning, modeling, construction and system submission. The system created is web-based using the PHP programming language and MySQL database.The results of the study concluded that the design of the plantation production monitoring system for the office admin can be implemented and is expected to help the office admin in managing harvest data and can reduce errors in the data input process.

The research took place at Wastec Internasional Company, a company engaged in environmental waste processing services. The oil from the crude oil waste processing treatment process still has Basic Sediment and Water (BS&W) content and oil content that is too high so that it cannot reach the established standards so that the company must make efforts to reduce waste from the production process. The purpose of the study was to determine the sigma value, the number of defects and factors causing quality failure in crude oil processing treatment at PT Wastec Internasional. The methods used are the DMAIC method, control maps and fishbone diagrams. The calculation results obtained an average BS & W sigma value of 3.4 and an oil content sigma value of 3.29. The average number of defects for BS&W was 9.075% and for oil content was 2113 mg/L. The factors causing treatment quality failure are material, method and environmental factors.

This study was conducted to analyze the effect of suction power effectiveness on cyclones in Light Tenera Dust Separator (LTDS) 1 and 2 units on the level of palm kernel losses at PTPN IV Regional II Plantation Unit and Adolina Palm Oil Mill (POM). Palm kernel loss is a significant factor that can reduce production efficiency, as palm kernel has high economic value and is the main product in the palm oil industry. Kernel losses not only reduce production efficiency but also create significant economic disadvantages for the palm oil mill. The research method used was a gravimetric method with a field experiment approach. The research process included sampling from LTDS waste, separating kernels from shells, and measuring suction speed using an anemometer to determine cyclone performance. The gravimetric method was applied to quantify the proportion of kernel mixed with shell waste, providing measurable data on suction efficiency. The results showed that low suction power effectiveness was directly proportional to the increasing number of kernels that were thrown away with the shells. In other words, poor suction performance directly correlates with higher kernel losses. The main contributing factors include leaks in the cyclone, suboptimal blower settings, and inadequate operator skills. Operational skills and equipment maintenance were identified as crucial determinants of system performance. Based on these findings, improvements to the suction system are recommended through routine maintenance, leak checks, and blower setting calibration. Furthermore, operator training is required to precisely adjust suction power. By maintaining suction effectiveness and optimizing blower settings, kernel losses can be reduced below the standard threshold of 2.0%. Thus, mills can improve operational efficiency while minimizing economic losses due to palm kernel loss.  

This research explores how several monetary policy and commodities market influence the movement of the Indonesia Composite Index (IHSG). Monetary policy is a set of actions taken by the central bank to regulate the currency and the economy, variable proxy is Rupiah Exchange Rate (Jisdor) and Indonesia Overnight Index Average (indONIA). Commodity markets are places where commodities are traded in physical or futures, the needs of the world still depend on certain commodities so that commodity prices can be related to economic conditions, variable proxy of comodities market is Gold, Crude Oil WTI, Coal Newcastle. Indonesia Composite Index is a index that reflects the price movements of all stocks listed on the Indonesia Stock Exchange. The study analyzes monthly data from January 2019 to December 2023, a period before the global disruption of the COVID-19 pandemic, the period during the pandemic and the gradual economic rebound that followed. Using multiple linear regression analysis, the study assesses the direction and statistical relevance of each variable’s effect on the Indonesia Composite Index. The results suggest that Indonesia Overnight Index Average and Crude Oil WTI prices have a significant positive impact on the index, the Rupiah Exchange Rate has a significant negative impact on the index, while Gold and Coal Newcastle have no significant impact on the index. These findings can serve as a useful reference for both investors and policymakers in understanding and anticipating movements in Indonesia’s capital market, especially in relation to monetary policy and global commodity trends.

The Ripple Mill machine is one of the vital components in a Palm Oil Mill (PKS) that functions to separate the palm kernel from its shell. This process is very important because the quality and quantity of the palm kernel produced will directly affect the economic value and production efficiency in the palm oil industry. At PTPN IV Regional II Plantation Unit and Adolina PKS, various technical problems were found that caused a decrease in machine performance, including rotor bars and square bars that experienced wear due to age and improper machine settings. In addition, other damage that often occurs is a broken van belt due to age and excessive tension, feeder motor dysfunction caused by excessive load, and motor overheating that occurs due to age and high workload. To overcome these problems, this study uses the Failure Mode and Effect Analysis (FMEA) method. This method aims to identify various potential failures, assess the severity, frequency of occurrence, and detection capability, so that the Risk Priority Number (RPN) value can be calculated as a basis for repair priorities. The results showed that worn rotor bars and worn square bars had the highest RPN values, each at 280, equivalent to 40.23% of the total identified risks. This indicates that these two components are critical points requiring immediate repair and maintenance attention. Applying FMEA in this context provides tangible benefits, including helping the company formulate a more targeted maintenance strategy, reducing the risk of recurring damage, and minimizing downtime that impacts production. With more systematic maintenance, operational efficiency can be improved while extending the lifespan of the Ripple Mill machine.

Work fatigue is a physical condition that weakens workers, causing less than optimal work capacity and endurance. Lactic acid is produced from anaerobic metabolism or carbohydrate metabolism without oxygen. This happens because there is not enough oxygen to support muscle energy production. The body that cannot produce the amount of lactic acid that is comparable to the rate of its synthesis, then the muscle pH will decrease, this is what inhibits glycolysis enzymes resulting in physical fatigue. Physical fatigue is the effect of increased levels of lactic acid in the body, especially muscles. One of the jobs at PT. X in Kampar Regency that can cause work fatigue is a palm oil harvester. This study is an observational study type with a cross-sectional study design. Data were obtained using interviews using a BMI questionnaire. Data collection was also carried out to obtain BMI measurement data, pulse measurements, blood pressure measurements, and lactic acid measurements with Accutrend Plus Roche Brand on 138 harvesters at PT. X Kampar Regency. In this study, the independent variable is the level of lactic acid and the dependent variable is work fatigue. The results of the study showed that the harvesters who experienced moderate work fatigue were 13 people (11.4%). The harvesters who experienced high work fatigue were 54 people (47.4%). The harvesters who experienced very high work fatigue were 47 people (41.2%). The high proportion of workers who experienced high and very high work fatigue (88.6%) reflects the significant physical workload that must be faced by oil palm harvesters at PT. X. Harvesters with lactic acid levels <2 mmol/l (not increasing) were 13 people (11.4%) and harvesters with lactic acid levels> 2 mmol/l (increasing/hyperlactatemia) were 101 people (88.6%). From the results obtained, a significant increase in lactic acid levels in 88.6% of respondents indicated that most workers experienced higher muscle fatigue conditions during work with increased lactic acid levels.

Computer networks have become an important need for a company. At the moment. Because the wifi network contains the internet which plays a role in data transfer and communication to support the operations of the PT company. Muaratoyu Subur Lestari (PT.MSL) as a company operating in the palm oil sector relies heavily on the internet to increase company productivity. Every day, employees always report data to the head office. In uncovering the problem, researchers built a network using Cambium Access Points to improve connectivity and internet access in an area. Cambium Networks, as a leading network solutions provider, offers advanced technology to build reliable and efficient networks. This research focuses on implementing Cambium Access Points in a local network environment, with the aim of increasing internet access coverage and speed. Research methods include field surveys, analysis of user needs, and selection of devices that suit environmental characteristics. Implementation steps include configuring the Access Point, determining the location of the equipment installation strategy, and setting network parameters. Regular performance monitoring also ensures network stability and permissions. The research results show a significant increase in area coverage and signal quality, as well as an increase in internet access speed. Additionally, Cambium's Access Point solution proved reliable and easy to manage, making a positive contribution to employees in the mess through better access to information and online resources. This research provides an in-depth look at the potential of Cambium Access Point technology in supporting the development of reliable and efficient networks

This research was conducted at PTPN IV Regional II Adolina Palm Oil Plantation and Mill Unit with the aim of evaluating the effect of Ripple Mill machine efficiency on palm kernel impurity levels through a multiple linear regression analysis approach. Ripple Mill is a vital piece of equipment in the palm kernel cracking process, which plays a role in determining the quality of the palm kernel. This machine works by breaking the kernels to produce kernels that are separated from the shells. However, when machine efficiency decreases due to technical and operational factors, palm kernel impurity levels tend to increase, characterized by an increase in shell fragments, fibers, and other foreign materials. This condition can have an impact on decreasing product quality and increasing further processing costs. Data collection was carried out over five days of observations covering the variables of machine efficiency and kernel impurity levels obtained from production results. The study found a strong negative correlation between machine efficiency and impurity levels in palm kernels. This means that the higher the efficiency of the Ripple Mill, the lower the resulting palm kernel impurity levels. This finding also confirms that quality control in the production process is not only determined by raw material factors but also highly dependent on the performance of the processing machine. Furthermore, the research results demonstrate the importance of implementing preventive maintenance strategies, including regular inspections of the rotor bar, square bar, and drive motor, as well as regulating operating parameters such as rotational speed and machine load. Proper preventive maintenance and operational control are essential to sustain machine efficiency and product quality. Therefore, continuous improvement in technical and managerial aspects is essential to maintain palm kernel quality and support optimal palm oil mill productivity.

In Indonesia, approximately 70 million people live in malaria-endemic areas, putting them at risk of transmitting the disease to others. Geographic information systems (GIS) are essential tools for mapping and visualizing spatial characteristics, as well as analyzing detailed information. GIS first developed in the late 1950s and has been used in various industries, such as oil and gas, telecommunications, as well as agriculture, forestry, and green open spaces (RTH). This study employed a narrative literature review method, synthesizing previously published information on GIS in green open spaces. The results showed that the classification of aerial imagery using GIS can be divided into two main classes: 'private green spaces' and 'others'. This study focused on finding a significant amount of urban green space in informal settlements, which cover more than 10% of the area. The increase in the number of informal settlements is directly proportional to the increase in private green space. The study also noted that poor communities have access to urban green spaces, which can improve their quality of life. Identification and management of green spaces in informal settlements can strengthen residents' self-confidence and reduce the gap between formal and informal areas in cities.

Aceh’s economy has long been dominated by the oil and gas sector, particularly LNG Arun exports, which contributed more than 40% of regional GDP (GRDP) in the early observation period. However, declining production after 2014 drastically reduced its share to below 20%, and in recent years, to only around 10–12%. This study aims to analyze the contribution of oil and gas (migas) and non-oil and gas (nonmigas) exports to Aceh’s economy and to assess the potential of export diversification as a sustainable development strategy. The research employs a quantitative approach using secondary time series data from 2007–2021 obtained from BPS, Bank Indonesia, and other official sources. Data were analyzed descriptively and through simple econometric models, including OLS regression and cointegration tests. The findings reveal that oil and gas exports are significant in the short term but have weakened in the long term. In contrast, non-oil and gas exports, although relatively small, exhibit stable growth and demonstrate a long-term relationship with GRDP. These results underscore the importance of diversifying exports towards nonmigas commodities, particularly coffee, cocoa, rubber, and fisheries. The practical implication is the urgent need for Aceh’s development strategy to shift from oil and gas dependence towards globally competitive nonmigas industrialization

This study aims to analyze how the mass media constructs the discourse of territorial conflict through reporting on the dispute over four islands in the waters of Aceh Singkil that were transferred to North Sumatra. This study highlights how two national media, Tempo.com and Kumparan.com, frame the issue of territorial boundaries that are administratively, politically, and economically sensitive. The novelty of this study lies in the comparative framing approach between the two media with different journalism styles, as well as their relationship to the potential for socio-political escalation at the local level. This study uses a qualitative method with Robert Entman's framing analysis model approach, which examines four main elements: define problems, diagnose causes, make moral judgments, and suggest remedies. The results show that Tempo.com tends to frame the conflict as an administrative and technocratic problem that is resolved through legal channels and cross-institutional coordination, while Kumparan.com emphasizes the economic dimension by highlighting the potential for oil and gas reserves on the disputed islands, opening up space for public speculation, and encouraging collaborative solutions between regions. This difference in framing emphasizes the role of the media in shaping public perception and maintaining the stability of the narrative on the issue of territorial conflict in Indonesia.

This literature study examines the construction of cultural identity through socio-economic practices in plantation ecosystems among the Acehnese, Malay, and Chinese communities in Indonesia. Using a systematic literature review of 42 selected sources (1990-2023), the research reveals that plantations function as sites of identity negotiation—dynamic arenas of cultural adaptation and resistance. In Aceh, the integration of Islamic values (zakat [alms] from plantations, meunasah education) and local wisdom (peusijuek rituals) mediates post-conflict reconciliation and identity transformation from "combatants" to "farmers" (Muchlis et al., 2023; Aulia et al., 2024). For the Malay community, the customary-territorial concept of bela kampung (communal defense) underpins resistance to authority fragmentation through gotong royong (mutual cooperation) and communal land allocation (Yunanda et al., 2024; Nasution et al., 2024). Meanwhile, the Chinese community develops invisibility strategies (e.g., land acquisition via family foundations, citizenship aliases) to convert legal marginalization into clan-based social capital (Irawan, 2016; Thung, 2018). Key findings highlight divergent identity sources: religiosity (Aceh), customary-territoriality (Malay), and clan social capital (Chinese). The study recommends integrating local wisdom into inclusive plantation policies and employing ethnographic approaches to examine identity intersectionality complexity.

Product quality is affected by the conventional turning process that requires coolant to maintain surface smoothness and reduce tool wear. Vegetable oils such as coconut, corn, and palm oil are environmentally friendly alternatives to chemical coolants (dromus). This study tested the effect of vegetable coolants on the surface of ST 60 steel using an experimental method with variations in a mixture of oil, water, and liquid soap. Turning was carried out at a depth of 0.5 mm, a rotation speed of 1035 rpm, and a cutting speed of 65 mm/min. The results showed that the lowest roughness was in variation 7 (80% corn oil + 10% water + 10% liquid soap) with an initial roughness value of 2.438

This study aims to determine the effect of leverage on financial performance and the effect of financial distress risk on the relationship between leverage and financial performance. The population in this study is several oil, gas, & coal sub-sector companies listed on the Indonesia Stock Exchange in 2020, 2021, 2022, and 2023. This study uses secondary data. The sampling technique uses the simple purposive sampling method, resulting in 57 companies as samples for 4 years. This study uses Moderated Regression Analysis as the data analysis technique. The results of the study show that leverage has a negative effect on financial performance, and financial distress risk is able to strengthen the relationship between leverage and financial performance.

Legal protection for consumers is an important issue in maintaining public trust in products circulating in the market, especially in subsidized cooking oil products. Decreasing quality or cutting product content can affect consumer perception, which has an impact on decreasing trust in the product brand. This study aims to analyze the impact of legal protection on the consequences of cutting subsidized cooking oil and how this incident affects public trust. The research method used is a qualitative approach with a case study analysis of the event of cutting the contents of cooking oil products by PT AEGA. The results of the study indicate that non-compliance with product quality standards can cause consumer distrust and worsen the brand image that has been identified with the government subsidy program. Therefore, it is important for the government and business actors to increase transparency, supervision, and law enforcement so that the public does not feel disadvantaged and continues to trust the products they consume. This study also recommends strengthening regulations and legal counseling to the public to increase their awareness and participation in consumer protection.

The essential oil of lemongrass (Cymbopogon citratus) is a high-value commodity widely used in the food, pharmaceutical, and cosmetic industries due to its bioactive components such as citral. Optimizing its distillation process is necessary to achieve maximum yield with time and energy efficiency. This study aims to determine the hourly yield distribution of essential oil from Lombong-type lemongrass during steam distillation and to analyze its extraction kinetics to identify the optimal distillation duration. Distillation was conducted for four hours with yield recorded each hour, and the data were analyzed using pseudo-first-order and pseudo-second-order kinetic models. The results showed that the highest yield was obtained in the first hour (0.1882%), followed by a sharp decline, with no additional yield observed in the fourth hour. The pseudo-first-order model showed the best fit to the experimental data with a rate constant of k = 0,8012/hour. Meanwhile the pseudo-second-order model did not fit well. These findings indicate that the extraction process is dominated by external diffusion and the rapid release of surface volatile compounds. Therefore, it is recommended that distillation duration be limited to two hours to optimize energy and time efficiency.

This study examines the causes and impacts of hazardous and toxic waste (B3) spills in Bekasi Regency, West Java. B3 waste such as used oil, batteries, and heavy metals can pollute the environment and harm public health. Key causes include lack of treatment facilities, violations of disposal procedures, and weather factors like flooding. The research uses normative legal approaches. The findings of this study underscore the necessity of managing hazardous waste in compliance with established regulations, enforcing environmental laws rigorously, and ensuring active involvement from both government institutions and the public in monitoring efforts. The application of the strict liability principle is considered highly important in providing a deterrent effect against polluters through legal accountability.

The creation of this artwork was inspired by the artist, who is a native of the Batak Toba tribe from Pollung District, Humbang Hasundutan Regency. This area is known as a horse breeding region, which produces waste in the form of horsehide scraps. This waste is then utilized as an alternative medium for painting. The idea for the artwork was inspired by traditional Batak Toba games rich in cultural value. This research aims to visualize the form, historical background, and function of traditional Batak Toba games through paintings. In the creation process, horsehide and oil paint were used as media. Each painting depicts the visual form of the traditional game with a simple approach yet still reflects the characteristics and meaning of the games. The method of creating the artwork is based on the stages described by Hedriyana, which include five stages: preparation, elaboration, contemplation, the creation process, and completion of the artwork. The final result of this research is a series of paintings with various titles, as the author's visual interpretation of traditional Batak Toba games.