Camshaft lift is an important parameter that determines the height of the valve lift, calculated from the valve position when it is completely closed to the fully open position. This component plays a crucial role in regulating the flow of the air and fuel mixture into the combustion chamber. This study aims to improve the performance of a 200cc 4-stroke motorcycle engine through camshaft lift modification, which is expected to affect the characteristics of engine torque and power. Modifications were carried out by designing two types of modified camshafts, namely series A and series B, as a comparison to the standard camshaft. The research method used is experimental testing using a dynamometer to measure engine torque and power at various speeds, ranging from 4,000 to 10,000 RPM. The data obtained were analyzed to determine the effect of each type of camshaft on engine performance. The test results show that the B series camshaft provides the most significant performance improvement compared to the standard and A series camshafts. At 7,500 RPM, the standard camshaft produces an average torque of 19.2 Nm, the A series camshaft 19.6 Nm, while the B series camshaft reaches 21.2 Nm. Meanwhile, at 10,000 RPM, the average power of the standard camshaft is recorded at 22.2 HP, the A series camshaft 24.1 HP, and the B series camshaft reaches 26.3 HP. This increase indicates that the camshaft lift modification is able to optimize the duration and height of the valve opening, so that the supply of the fuel and air mixture to the combustion chamber becomes more efficient. Thus, camshaft modification, especially the B series, is an effective and applicable solution in increasing the performance output of a 200cc motorcycle engine without having to make major changes to the overall engine structure.

Pain is an unpleasant sensation that can interfere with an individual's quality of life and requires effective management. Synthetic analgesics such as ketorolac, codeine, etoricoxib, and celecoxib are commonly used to relieve pain, but long-term use can cause adverse side effects, including gastrointestinal disturbances, dependence, and cardiovascular risks. Therefore, it is important to find safer, natural alternatives. One promising alternative is the extract of the dragon’s tail leaf (Rhaphidophora pinnata), a plant traditionally used in Indonesian medicine as a pain reliever. This study aims to evaluate and compare the analgesic effects of Rhaphidophora pinnata leaf extract with several synthetic drugs using the writhing test on male mice (Mus musculus). The mice were induced with pain by injecting a 0.5% acetic acid solution. The treatments included ketorolac, codeine, etoricoxib, celecoxib, and Rhaphidophora pinnata leaf extract. The results showed that all treatments, including both synthetic drugs and Rhaphidophora pinnata leaf extract, produced significant analgesic effects compared to the negative control (Na CMC 0.5%). Ketorolac showed the highest effectiveness, followed by codeine, etoricoxib, and celecoxib. Although the Rhaphidophora pinnata leaf extract showed potential as a natural analgesic, its effectiveness varied among individual test animals. Some mice showed a better response to the leaf extract, but overall, the analgesic effect was still lower than that of synthetic drugs. These findings support the use of medicinal plants as a safer alternative to synthetic analgesic drugs. Moreover, this study provides a foundation for further research aimed at isolating active compounds from Rhaphidophora pinnata leaf extract to develop more effective and safer pain-relieving medications.

This study aims to examine in depth the influence of price, promotion, and switching barriers on customer loyalty of Telkomsel prepaid cards, with customer satisfaction as an intervening variable in Generation Z in West Palu District. This study is motivated by the intense competition in the telecommunications industry and the importance of maintaining customer loyalty amidst the increasing number of service options. Data were collected from 100 respondents who are active Telkomsel prepaid card users through questionnaires. Data analysis was conducted using the Structural Equation Modeling-Partial Least Squares (SEM-PLS) approach using SmartPLS software version 4.0. The results show that the price variable has a significant direct effect on customer loyalty, but does not show a significant effect on customer satisfaction. Conversely, promotion has a significant effect on satisfaction, but does not directly affect customer loyalty significantly. Switching barriers are shown to have a significant effect on both satisfaction and loyalty, indicating that the higher the switching barriers, the more likely customers will remain loyal. In addition, customer satisfaction also significantly affects loyalty. Another important finding is that of the several indirect influences tested, only the path from promotion through satisfaction to loyalty was statistically significant. Therefore, this study suggests the importance of targeted promotional strategies and strengthening switching barriers as effective measures in retaining young customers who are prone to switching services. Furthermore, this study emphasizes that customer loyalty is not solely determined by competitive pricing factors, but is more complex and influenced by customers' emotional and psychological experiences, such as satisfaction with the service and perceptions of the ease or difficulty of switching to another service provider.

The application of the MOORA (Multi-Objective Optimization on the basis of Ratio Analysis) method in employee promotion decisions at PTPN 4 aims to enhance efficiency and objectivity in decision-making. This method allows managers to evaluate employees based on multiple criteria simultaneously, such as performance, experience, contributions, and other relevant factors. By considering these various aspects, MOORA helps make promotion decisions more transparent and fair. One of the primary advantages of applying the MOORA method is its ability to reduce bias that may occur during the promotion process. Bias can arise from subjectivity or imbalance in employee assessments, which are often based on individual judgments or personal perceptions. By using MOORA, promotion decisions are based on more objective and measurable data, making the process more systematic and structured. The MOORA method can also increase employee motivation. A transparent promotion process based on clear criteria provides employees with a strong incentive to continuously improve their performance. When employees know that promotions are based on fair evaluation, they are more motivated to work harder. This, in turn, will increase overall productivity and performance at PTPN 4. The implementation of MOORA at PTPN 4 also provides advantages in better human resource management. With the MOORA-based decision support system, managers can easily identify employees who have the best potential for promotion. This process involves several steps, such as data normalization, determining criteria weights, and calculating final values that reflect overall employee performance. The end result is the selection of employees who meet the qualifications and have outstanding performance for promotion, supporting the sustainable development of the organization.

This study explores the strategic use of garbarata as an advertising medium at Minangkabau International Airport, Padang. The garbarata, which is a connecting bridge between the terminal and the aircraft, has great potential as an exclusive advertising space and has high exposure to passengers. However, this potential has not been optimally maximized. This study uses a qualitative approach with a case study method. Data collection was conducted through in-depth interviews with airport management, direct observation of the garbarata conditions, and analysis of documentation related to advertising policies and non-aeronautical asset management. The results of the study indicate that there are several main obstacles in the use of garbarata as a promotional medium. These obstacles include minimal promotional activities to potential advertisers, unclear pricing systems for advertising space rentals, lack of collaboration with advertising agencies, and limitations in the provision of design services and visual creativity. This has led to low interest of companies in utilizing this media as part of their marketing strategy. To overcome these problems, this study proposes several development strategies, including: increasing active and planned promotional activities, setting flexible and competitive rental prices, strategic collaboration with professional advertising agencies, and providing creative design services to support the effectiveness of advertising messages. This strategy is expected to attract more companies to advertise on the aerobridge, thereby increasing the airport's non-aeronautical revenue. With proper optimization, the aerobridge will not only serve as a functional passenger facility but can also transform into a strategic asset supporting the airport's sustainable commercial development and creating added value for both the operator and its business partners.

This study aims to investigate the effects of liquidity, financial leverage, capital structure, and operating cash flow on financial performance, with financial distress serving as a mediating variable. The population comprises transportation and logistics companies listed on the Indonesia Stock Exchange (IDX) from 2019 to 2023, totaling 37 companies. The sample includes 20 companies, with quarterly financial reports yielding 400 observations. Secondary data were employed, and purposive sampling was utilized for sample selection. The analysis was conducted using panel data analysis at a 5% significance level, facilitated by STATA Version 17 software. Mediation was tested utilizing the Sobel test with a critical value of 1.96. The results reveal that liquidity significantly impacts both financial distress and financial performance; financial leverage significantly affects both financial distress and financial performance; capital structure significantly influences financial distress but does not significantly affect financial performance; operating cash flow does not significantly impact financial distress but significantly affects financial performance. Collectively, liquidity, financial leverage, capital structure, and operating cash flow significantly influence financial distress. Furthermore, liquidity, financial leverage, capital structure, operating cash flow, and financial distress together have a significant effect on financial performance. Mediation analysis indicates that financial distress significantly mediates the relationships between liquidity, financial leverage, capital structure, and financial performance, whereas financial distress does not significantly mediate the effect of operating cash flow on financial performance. It is recommended that transportation and logistics companies listed on the IDX actively enhance liquidity, optimally manage leverage and capital structure, and strengthen operational cash flow management to minimize financial distress risk and sustain financial performance.

Purse seine fishing gear is a type of fishing equipment consisting primarily of a large net, designed to catch both large and small pelagic fish. This study aimed to (1) determine the effect of time differences—morning and evening—on the catch of flying fish using mini purse seine fishing gear, and (2) identify the composition and dominant species caught in each fishing period. The research was conducted at Banda Neira Pier, Banda District, Central Maluku Regency, Maluku, Indonesia. An experimental fishing method was applied, and data were analyzed using the Two Sample t-Test. Fishing operations were carried out over 16 trips, equally distributed between morning and evening sessions. The total recorded catch comprised 15,078 kg of mackerel (Rastrelliger sp.), 4,017 kg of skipjack (Katsuwonus pelamis), 18,743 kg of deho (Euthynnus affinis), and 45,601 kg of flying fish (Decapterus sp.). In the morning, the total catch reached 36,005 kg, dominated by flying fish, whereas in the evening, it was 50,250 kg, also dominated by flying fish. Statistical analysis using the Two Sample t-Test focused on the dominant species, flying fish, and revealed a p-value of <0.05. This indicates a significant difference in the composition of the catch between morning and evening fishing activities. The findings suggest that fishing time plays a crucial role in catch volume, particularly for flying fish, with evening fishing showing higher yields. These results can be valuable for optimizing fishing strategies, improving efficiency, and supporting sustainable fisheries management in Banda Neira and similar pelagic fishing grounds.

Undang-Undang Dasar 1945 pasal 31 ayat (1) menetapkan bahwa “setiap warga negara berhak mendapatkan pendidikan”. Selanjutnya UU No.20 Tahun 2003 tentang Sistem Pendidikan Nasional Pasal 5 menegaskan “setiap warga negara mempunyai hak yang sama untuk memperoleh pendidikan bermutu”. Pada prakteknya di provinsi yang wilayah luas dengan kapasitas fiskal terbatas, permasalahan membagi kue anggaran menjadi dilematis dan berdampak pada kurang optimalnya kebijakan pembangunan di lini-lini daerah. Kajian ini mengungkapkan bagaimana kebijakan pendidikan di sekolah-sekolah pedalaman pada 3 kabupaten  yakni Gunung mas, Katingan dan Seruyan dan dampaknya terhadap pendidikan Kalimantan Tengah. Metode penelitian digunakan dengan pendekatan kualitatif studi kasus, strategi pengumpulan data secara triangulasi. Data diperoleh melalui pengisian form kondisi infrastruktur, aksesibilitas, guru dan tenaga kependidikan, anggaran dan penyelenggaraan kegiatan belajar mengajar. Data dilengkapi dengan wawancara mendalam dengan informan kunci yakni pejabat pemda terkait pendidikan, kepala sekolah, guru, serta perwakilan masyarakat dan orang tua siswa dan observasi.  Hasil penelitian menunjukan adanya defisiensi infrastruktur pendidikan, keterbatasan aksesibilitas geografis, serta kualitas sumber daya manusia yang belum optimal dalam sektor pendidikan di kawasan tersebut. Minimnya kolaborasi antar pemangku kepentingan dan rendahnya tingkat partisipasi aktif masyarakat dalam proses perencanaan kebijakan pendidikan, dan berdampak pada belum optimal kegiatan belajar mengajar dan kualitas keluaran (lulusan) sekolah. Penelitian ini merekomendasikan perlunya formulasi kebijakan lebih spesifik dan responsif terhadap karakteristik sekolah-sekolah daerah pedalaman, yang mencakup prioritas pada peningkatan infrastruktur pendidikan, pemerataan distribusi tenaga pendidik yang berkualitas, serta optimalisasi pemanfaatan teknologi dan pendekatan yang berbasis pada kearifan lokal guna meningkatkan mutu pendidikan di kawasan tersebut.

This study aims to determine the effect of adding EM4 probiotics in various doses to commercial feed on the growth of jatimbulan tilapia (Oreochromis niloticus L). Probiotics are known to play a role in increasing digestive efficiency, nutrient absorption, and maintaining the health of the fish's digestive tract, so they are expected to support optimal growth. The research method used was a Completely Randomized Design (CRD) with four treatments, namely: P0 (control/without probiotics), P1 (5 ml EM4/kg feed), P2 (7 ml EM4/kg feed), and P3 (11 ml EM4/kg feed), each with four replications. The parameters observed were the growth in length and weight of jatimbulan tilapia during the maintenance period. The results showed that the administration of EM4 probiotics at certain doses was able to provide a significant effect on the growth of tilapia compared to the control treatment. Treatment P2 (7 ml/kg feed) provided the best growth results compared to other doses, both in terms of increasing length and body weight. Meanwhile, administering probiotic doses that are too low (P1) or too high (P3) tends to be less effective in supporting optimal growth. This is thought to be due to the disruption of the microbial balance in the digestive tract when the probiotic dosage is incorrect. This research provides useful information for Jatimbulan tilapia cultivation practices, particularly regarding the use of probiotics to increase growth efficiency. Using the correct probiotic dosage can be a strategy to increase the productivity and sustainability of freshwater fish farming.
 

The objective of this mentoring activity is to increase the capacity of swimming pool managers, particularly in strengthening management and sustainable management strategies. With this increased capacity, it is hoped that Tirta Arum Swimming Pool can develop into a valuable village asset, both economically and socially. The swimming pool will not only provide a source of income for the village but also serve as a means of recreation, education, and social interaction for the surrounding community. The method used in this mentoring activity is Participatory Rural Appraisal (PRA), an approach that emphasizes active community participation in every stage of the planning process, decision-making, and program implementation. PRA enables village communities, including Tirta Arum Village-Owned Enterprise (BUMDes) managers, to analyze their environmental conditions, identify problems, and design contextual and sustainable solutions. This approach is implemented through structured mentoring, education, and training activities. Direct community involvement aims to foster a sense of ownership and responsibility for swimming pool management. In addition, with training tailored to local needs, managers are expected to be able to apply effective management principles, from planning and financial management to customer service and promotional strategies. Thus, the results of this activity are not only temporary improvements, but also long-term empowerment that contributes to the independence and business aspirations of the Village-Owned Enterprise (BUMDes). Through the PRA method, this activity not only provides an immediate solution to swimming pool management problems but also increases the independence of the community and managers in developing and operating the business sustainably. This increased community participation is expected to foster a sense of ownership (a sense of belonging) towards the swimming pool as a shared property.