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Primary dysmenorrhea is a common reproductive health problem among adolescents and women of reproductive age, significantly affecting quality of life and academic productivity. Psychological stress and dietary patterns are considered important contributing factors influencing the incidence and severity of menstrual pain. This study aimed to analyze the relationship between stress levels and dietary intake with the occurrence of primary dysmenorrhea in adolescents and women of reproductive age. A literature review was conducted using articles published between 2015 and 2025 retrieved from Scopus, PubMed, and Google Scholar. Studies meeting the inclusion criteria were analyzed descriptively and narratively. The findings showed that the prevalence of primary dysmenorrhea ranged from 54.4% to 90.6%. Higher stress levels were significantly associated with increased risk and intensity of menstrual pain (OR up to 4.03). Frequent consumption of sugary foods, fast food, and pro-inflammatory dietary patterns was linked to higher incidence and severity of dysmenorrhea (OR up to 4.8), whereas adequate intake of fruits, vegetables, iron, calcium, and magnesium demonstrated protective effects. Primary dysmenorrhea is multifactorial and significantly associated with stress and dietary intake; therefore, integrated stress management and nutritional education interventions are recommended in adolescent reproductive health programs.

This study aims to explore the role of pet attachment among cat owners in Palembang, focusing on how emotional bonds are formed, interpreted, and influence psychological well-being. A qualitative approach was employed using purposive sampling to select two main participants who had high interaction intensity with their cats, along with additional informants from family members and neighbors. Data were collected through in-depth interviews, observations, and documentation, then analyzed thematically with source triangulation to ensure validity. The findings reveal that pet attachment develops through daily interactions such as feeding, cleaning, playing, and monitoring the cat’s health. Cats are perceived not only as domestic animals but also as companions that provide psychological comfort, emotional support, and stress reduction. Factors shaping attachment include emotional needs, intensity of daily interaction, empathy toward the pet’s condition, long-term caregiving commitment, and the perception of cats as significant companions. The duration of ownership strengthens attachment quality, while the loss of a pet triggers profound grief comparable to losing a family member. Moreover, pet attachment influences family dynamics and social identity, portraying owners as caring and empathetic individuals. In conclusion, pet attachment among cat owners in Palembang is a complex psychological phenomenon involving emotional, social, and behavioral dimensions. The relationship between humans and cats extends beyond utilitarian functions, evolving into deep affective bonds that serve as coping mechanisms and psychosocial support in urban life. These findings enrich the literature on human-animal relationships and highlight the therapeutic and emotional value of pets in modern society.

Healthcare is an integral part of health development in Indonesia, which aims to optimally improve public health. Hospitals, as healthcare facilities, are required to provide quality, safe, and patient-centered services. Service quality is a key indicator of service success, as good service impacts patient satisfaction. One of the most important services in hospitals is obstetrics, which directly relates to maternal and infant health, making patient satisfaction a crucial aspect. Midwives, as professional healthcare workers, play a strategic role in providing comprehensive, sustainable, and patient-centered midwifery care. This study aims to analyze the influence of healthcare facilities and midwife performance on patient satisfaction through service quality. The method used is a quantitative study with an analytical approach and a cross-sectional design. The results of the multiple linear regression test indicate that midwife performance has a more dominant influence on service quality than healthcare facilities. Meanwhile, regarding patient satisfaction, service quality is the most dominant factor, followed by midwife performance and healthcare facilities. The conclusion of this study is that service quality reflects the overall patient experience and is a key factor in improving patient satisfaction.

This study aims to analyze the technical and economic impact of power evacuation work on the 20 kV distribution system at PT PLN (Persero) UP3 East Bali. The main problem studied is the high losses and poor voltage profile on the downstream side of the Kintamani feeder. The method used is load flow simulation using ETAP software with a comparative approach to conditions before and after power evacuation. The results showed that the active losses decreased from 1.017 MW to 0.626 MW (efficiency 38.45%), accompanied by an increase in the end voltage from 16.32 kV to 18.72 kV and 19.38 kV, thus meeting the SPLN 1:1995 standard. The reduction in losses resulted in energy savings of 3,425,160 kWh/year. From the economic side, a payback period (PBP) of 1.40 years was obtained, which shows that the project is financially feasible. In addition, the improvement of network performance also contributes to the reliability of the distribution system and the continuity of the distribution of electrical energy to customers. Thus, power evacuation work has been proven to be effective in improving power distribution efficiency, improving voltage quality, and providing significant economic benefits.

The problem of urban flooding is a growing issue due to high population density, increasing volumes of plastic waste, and the reduction of water absorption areas. The use of conventional paving blocks, which are impermeable, further exacerbates flooding conditions because they do not allow water to infiltrate into the soil. This study aims to develop an innovative plastic waste-based paving block incorporating rice straw and sugarcane bagasse, along with the integration of phytoremediation concepts as a solution for urban flood mitigation. The method employed was an experimental approach involving the following stages: material preparation, plastic incineration, material mixing, molding, and testing of water absorption capacity and compressive strength. The results showed that paving blocks with a combination of plastic waste, rice straw, and sugarcane bagasse had the highest water absorption rate of 34% and compressive strength of 21 kg/cm², meeting SNI standards. The addition of natural materials containing silica was proven to enhance the material’s porosity and strength. Additionally, the application of phytoremediation using water hyacinth has the potential to improve the quality of water seeping into the soil. Thus, this phytoremediation-based paving block innovation can serve as an effective alternative solution to reduce flood risks while supporting sustainable waste management and environmental stewardship.

Generators are one of the important auxiliary aircraft needed on ships for power generation. During the operation of a diesel generator, continuous rotation occurs resulting in friction and erosion of the moving parts. The supporting factor for the smooth running of a diesel engine is a lubrication system that is supported by good lubricating oil quality, besides that it also needs to be supported by an adequate and good cooling system. The use of lubricants is one of the most important factors to ensure the performance of diesel engines. The lubricant is in charge of maintaining the condition of the engine so that it remains stable. This study aims to analyze the effect of using lubricating oil beyond the operating hours limit on engine heat. Furthermore, it also discusses steps to ensure diesel engine temperatures remain normal. This research was carried out during the practice of sailing on a ship for approximately one year. This study uses a descriptive quantitative research method. The primary data obtained directly utilizes observation methods, and documentation. Secondary data was obtained from existing articles and journals. The data analysis techniques used are descriptive analysis and inferential analysis. The results of this study show that the working hours of lubricating oil use have a significant influence on the increase in the temperature of diesel generator engines as evidenced by hypothesis tests on two engine units, namely AE1 and AE2. In the AE1 unit, a t-value of 18.467 with a significance of 0.000 was obtained, while in AE2 the t-value was 14.289 with a significance of 0.000. The significance value in both units is less than 0.05 so it can be concluded that the working hours of lubricated oil have a significant influence on the temperature of the genarato diesel engine on the ship.

This research is motivated by the importance tank cleaning process on tankers to prevent cargo contamination, maintain cargo quality, and ensure crew safety. MT. Marina Prosperity, a chemical/oil tanker, uses the Butterworth system as the primary method for tank cleaning at every cargo change. However, in practice, technical and operational constraints are still found that affect the results of tank cleaning. The research method used is descriptive qualitative with data collection techniques through direct observation on the ship, interviews with the Chief Officer and Boatswain, and documentation studies in the form of log books and SOPs. Data were analyzed by focusing on three aspects, namely work efficiency, work safety, and operational procedures for using Butterworth. The results show that the use of Butterworth can increase time and energy efficiency compared to manual methods, with an average cleaning time of 2–4 hours per tank depending on the type of cargo. From a safety aspect, Butterworth reduces the need for crew to enter the tank, thereby reducing the risk of exposure to chemicals and hazardous atmospheres. However, work effectiveness and safety are greatly influenced by the condition of the equipment, the stability of water pressure, and the crew's discipline in implementing the SOP. On several occasions, steps such as nozzle cleaning, manual mopping, and safety meetings were not consistently performed, resulting in residual load in certain areas. With routine equipment maintenance, close supervision, and ongoing crew training, Butterworth can be optimized to produce more effective, safe, and standards-compliant tank cleaning process.

Takaras River is a river basin that is vulnerable to pollution, particularly from the mercury usage in small-scale gold mining. This study aims to identify water quality based on mercury (Hg)and pH levels in the Takaras River. Samples were taken at two locations using a purposive sampling method. Results showed indications of mercury use on former gold mining land around the Takaras River altought the mercury content level was below 0.075 µg/L or 0.00075 mg/L in sample 1 and 2. Based on the test results, the acidity level (pH) in the two water samples from Takaras River is 3.86 and 3.84 in sample 1 and 2, compared to the maximum pH quality standard of 6-9 for Class II water, it is concluded that the scale of acidity in Takaras River is very low, indicating that the water quality in the Takaras River is highly acidic, abnormal, and shows signs of serious pollution. The implications of low pH levels in the Takaras River can cause damage to the Takaras River ecosystem, a decline in soil quality and fertility, and an increase in heavy metal toxicity in the environment surrounding the river.

Vegetables are food commodities widely consumed by the public due to their high nutritional content. Chili (Capsicum annuum L.), green beans (Phaseolus vulgaris L.), and Chinese cabbage (Brassica pekinensia L.) are among the vegetables that can be processed into various delicious dishes or consumed fresh as raw vegetables. To obtain healthy and high-quality vegetable crops, pesticides are commonly used to control pests that may damage the plants. One of the widely used pesticides is chlorpyrifos, which can leave residues that may pose both acute and chronic health risks. Therefore, it is necessary to analyze the levels of chlorpyrifos pesticide residues in vegetables. The residue levels were determined using a UV-Vis spectrophotometer at a wavelength of 230 nm with dichloromethane as the solvent, while qualitative analysis was performed using HPLC by comparing the retention times of standard solutions and vegetable samples. In this study, washing treatments were applied to the vegetables using dichloromethane, distilled water, well water, and tap water (PDAM) to evaluate the effect of washing on pesticide residue levels. The concentrations of pesticide residues in unwashed vegetables were chili (2.6680 ± 0.0214 mg/kg), green beans (2.4658 ± 0.0193 mg/kg), and Chinese cabbage (2.7950 ± 0.0379 mg/kg). The washing process was carried out three times for each solvent. After three washings using dichloromethane and distilled water, pesticide residues were no longer detected, whereas washing with tap water (PDAM) and well water still left residues, although at levels much lower than the Maximum Residue Limit (MRL). The health risk assessment showed that the aHQ and cHQ values were < 1, indicating that consumption within the recommended limits of these samples does not pose health risks, either in the short term or long term. This study provides important information that repeated washing is necessary to effectively reduce pesticide residue levels in vegetables before consumption.  

Submarine pipelines are vital infrastructures in aviation fuel distribution, carrying high risks of operational disruption, safety issues, and environmental pollution. In 2025, the aviation fuel receiving submarine pipeline at Integrated Terminal Ampenan was deformed due to mechanical pulling by MT Anargya I, causing system shutdown. This incident created risks of seawater intrusion, marine pollution, and potential fuel shortages at Lombok International Airport. This study evaluates the effectiveness of applying a double-ended draining method combined with an oil bubble trap as a fast, safe, and sustainable solution for submarine pipeline repair. Using a case study and descriptive-analytical approach based on the Continuous Improvement Program (CIP), the research analyzed quality, cost, delivery, safety, environmental, and workforce aspects. The results showed the method effectively drained aviation fuel without seawater contamination, prevented marine spills, maintained fuel quality within specifications, and completed repairs before critical stock levels were reached. Additionally, it provided significant cost savings compared to emergency supply operations and achieved zero safety incidents and environmental pollution. The integration of double-ended draining and oil bubble trap proved to be an effective, adaptive innovation with strong potential for replication and standardization in other aviation fuel submarine pipeline systems.

This study examines the role of innovation management in learning to improve the quality of basic education, particularly in elementary schools. The background of this research is the increasing demand for adaptive, creative, and student-centered learning approaches in response to rapid educational changes in the digital era. The objective of this study is to analyze how the implementation of innovation management strategies in learning can enhance teaching effectiveness, student engagement, and overall educational quality. This research uses a qualitative descriptive method through literature review by analyzing relevant books, journals, and previous studies related to learning innovation and educational management. The findings indicate that effective management of learning innovation—such as the integration of technology, the use of active learning models, and teacher professional development—significantly contributes to improving student learning outcomes and classroom interaction. Furthermore, innovation management encourages teachers to be more creative in designing learning activities that are contextual and meaningful for students. The study implies that schools and education stakeholders need to strengthen institutional support, provide continuous training for teachers, and develop policies that encourage sustainable innovation in learning. Thus, structured innovation management in learning becomes a key factor in enhancing the quality of basic education in a competitive global era.

This study aims to analyze the role of the principal in evaluating the Qur’an reading program using the Batiq Izzati method at RA Al-Izzah in Serang City. The principal holds a strategic responsibility in ensuring the quality of education, including the implementation of religious programs that play a crucial role in shaping Islamic character in early childhood. The Batiq Izzati method is an internally developed approach by the Al-Izzah Foundation, designed to facilitate Qur’an reading through a gradual, enjoyable, and child-friendly method. This research employs a descriptive qualitative approach, using data collection techniques such as observation, interviews, and documentation. The findings indicate that the principal has fulfilled eight key leadership roles; however, the evaluation process is not yet optimal due to limited time and insufficient parental involvement. Evaluations are conducted daily by teachers and periodically by the principal to determine students' progress through different levels (jilid). Supporting factors include competent teachers, adequate facilities, and a structured evaluation system, while inhibiting factors involve time constraints and limited human resources. This study recommends strengthening the principal's role in continuous evaluation and fostering better collaboration between the school and parents to enhance the program's effectiveness. 

This study aims to determine the influence of service quality on the satisfaction of mothers with toddlers at Posyandu Melati Mekar RW 05, Margajaya Village, Ngamprah District, West Bandung Regency. The method used is a quantitative approach with data collected through questionnaires distributed to 70 respondents using a saturated sampling technique. The results showed that the service quality at Posyandu Melati Mekar was in the "very high" category with a score of 3,007 out of a maximum of 3,500, while the level of satisfaction among mothers was in the "high" category with a score of 2,900. The t test showed a t value of 9.592, which is greater than the t table value of 1.995, with a significance level of 0.001, indicating a significant influence of service quality on mother satisfaction. A correlation coefficient of 0.758 indicates a strong and positive relationship, while the determination coefficient of 57.5% shows that service quality greatly contributes to customer satisfaction. Thus, improving service quality can directly increase user satisfaction with posyandu services

The rapid development of digital media has increased the complexity of health information flows and triggered the spread of misinformation, thereby requiring service personnel to be prepared to manage information critically. However, studies specifically examining the relationship between digital media literacy and readiness to handle health hoaxes among non-medical frontliner staff remain limited. This study aims to analyze the relationship between digital media literacy and readiness in handling health-related hoaxes among frontliner staff at RSUD Welas Asih Bandung. A quantitative approach with a survey method was employed, involving 243 respondents selected through a census sampling technique. Data were collected using a Likert-scale questionnaire and analyzed through validity, reliability, and Spearman’s Rank correlation tests. The results indicate that digital media literacy is at a high level, with digital safety (85.2%) and digital ethics (82.3%) as dominant indicators. Readiness in handling health hoaxes is also high, with gathering (78.6%) and planning (76.1%) as the highest indicators. The correlation test shows a positive and significant relationship with a coefficient of 0.794 (p<0.001), indicating a strong association. These findings suggest that improving digital media literacy significantly contributes to enhancing readiness in handling health hoaxes. Therefore, strengthening digital literacy is an important strategy to improve communication effectiveness and healthcare service quality.

The quality of interaction between physicians and patients plays a crucial role in the healthcare system, as it directly affects patient satisfaction. Ineffective communication by physicians may reduce patient satisfaction and increase the risk of complaints and medical disputes. This study aims to analyze the relationship between doctor–patient communication patterns and patient satisfaction in outpatient services. This research employed a quantitative approach with an observational analytic design using a cross-sectional method. The study population included all outpatient patients, with a sample of 110 respondents selected through accidental sampling. The independent variable was doctor–patient communication, while the dependent variable was patient satisfaction. Data were collected using a questionnaire, and analysis was performed using the Chi-Square test with a 95% confidence level. The results showed that the majority of respondents rated doctor–patient communication as good (80.9%) and reported high levels of satisfaction (75.5%). The analysis revealed that among respondents who experienced good communication, 84.3% reported high satisfaction, whereas the proportion of high satisfaction decreased significantly in the groups with moderate and poor communication. In conclusion, there is a significant relationship between the quality of doctor–patient communication and patient satisfaction in outpatient services, where improvements in communication quality are consistently associated with increased patient satisfaction.

Low-rank coal generally has a high moisture content, which results in a low calorific value and suboptimal quality for utilization as an energy source. One method that can be applied to improve coal quality is the Upgrading Brown Coal (UBC) process, which functions to reduce moisture content and increase fixed carbon value. This study aims to analyze the effect of heating time and the ratio of used oil composition on improving coal quality based on proximate parameters. The research method includes collecting coal samples from four locations in Samarinda and its surrounding areas, namely SMAN 1 Samarinda, Bhineka Street, Palaran Stadium, and Tani Bakti Village. The samples were analyzed using proximate analysis, including inherent moisture (IM), ash content (AC), volatile matter (VM), and fixed carbon (FC), both before and after the UBC process. The upgrading process was carried out with variations in heating time and used oil composition as a coating medium to enhance coal stability and prevent moisture reabsorption. The final results of the upgrading process showed the best values of inherent moisture at 13.64%, ash content at 4.66%, volatile matter at 55.06%, and fixed carbon at 44.94%. The results indicate that the UBC process is capable of reducing inherent moisture and increasing fixed carbon, thereby improving coal quality. Variations in heating time and used oil composition have a significant effect on changes in proximate parameters. Longer heating time and an appropriate ratio of used oil composition result in a more optimal improvement in coal quality.

This study aims to analyze the role of brand equity in enhancing the competitiveness of batik sandal products at “Dinara Wooden Heel.” The research adopts a qualitative approach using a case study method to gain an in-depth understanding of how the elements of brand equity namely brand awareness, perceived quality, brand association, and brand loyalty are developed and utilized by the business actors. Data were collected through in-depth interviews with the business owner and consumers, direct observation, and documentation. The data analysis technique was conducted descriptively through the stages of data reduction, data display, and conclusion drawing. The findings indicate that brand equity plays a significant role in improving the competitiveness of Dinara Wooden Heel. The dimensions of perceived quality and brand association serve as the primary strengths in creating competitive advantage through consistent product quality and culture-based differentiation. Meanwhile, brand awareness declined due to distribution limitations during the pandemic, but has gradually recovered through the utilization of social media. On the other hand, brand loyalty has been established through repeat purchases, although its management remains relatively informal. Overall, the four dimensions of brand equity are integrated in enhancing competitiveness through brand visibility, product differentiation, consumer trust, and customer loyalty.

This article examines needs analysis and curriculum analysis as the foundational bases for developing effective teaching materials. Using a library research method, this study reviews various scientific journal articles, reference books, and relevant official documents. Needs analysis is a systematic process conducted to identify the gap between students' current conditions and the competencies they are expected to achieve, serving as the most critical stage in determining the direction of teaching material development. Meanwhile, curriculum analysis is carried out to ensure that the teaching materials developed remain aligned with competency standards, learning outcomes, content structure, and applicable educational policies. The integration of both analyses produces teaching materials that are not only contextually relevant to students' real conditions but also consistent with curriculum demands. Systematic steps in this integration including learner characteristic analysis, curriculum document review, material priority mapping, and authentic assessment design significantly contribute to improving the quality, effectiveness, and meaningfulness of learning. This article concludes that needs analysis and curriculum analysis are inseparable and must be conducted systematically before the development of teaching materials begins.

This study was conducted to examine the extent to which product price and quality influence consumer interest in purchasing MMTC Tax. These two elements are believed to be the main considerations in the purchase decision-making process. This research applied a quantitative method using a survey technique, in which data was collected through the distribution of questionnaires to MMTC Tax service users. The data analysis technique used was multiple linear regression to measure the effect of each independent variable on the dependent variable. The findings show that both price and product quality have a positive and significant impact on purchasing interest. Together, these two factors were found to significantly influence consumers' willingness to make a purchase. Based on these results, it can be concluded that competitive pricing and superior product quality can drive an increase in the purchasing interest of MMTC Tax consumers.

This study aims to analyze the effect of Brand Image, Product Quality, and Promotion on Purchase Decisions of Crocs sandals in Batam City. The research employs a quantitative approach using a survey method. Data were collected through questionnaires distributed to 119 respondents who are consumers of Crocs products in Batam City. The data analysis techniques include validity and reliability tests, classical assumption tests, multiple linear regression analysis, t-test, F-test, and coefficient of determination analysis, using SPSS version 26. The results indicate that Brand Image and Product Quality have a positive and significant effect on Purchase Decisions. Meanwhile, Promotion shows a positive but insignificant effect on Purchase Decisions. Simultaneously, Brand Image, Product Quality, and Promotion have a positive and significant effect on Purchase Decisions. The Adjusted R Square value of 0.905 indicates that 90.5% of the variation in Purchase Decisions can be explained by the three independent variables, while the remaining 9.5% is influenced by other factors not examined in this study. This research is expected to provide insights for companies in formulating more effective marketing strategies, particularly in strengthening brand image and improving product quality.