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The use of sengon albasia ash waste as a partial cement substitute in concrete production is carried out to reduce combustion waste and also reduce cement use. This study focuses on the use of sengon albasia wood ash waste. The use of sengon albasia wood ash as a cement substitute causes a significant decrease in the slump test value. The use of sengon albasia wood ash as a partial cement substitute in concrete mixes actually produces different results depending on the proportion. If added as much as 10%, the concrete's compressive strength actually increases, but if it reaches 20% or 30%, the compressive strength actually decreases. This occurs because this type of wood ash has a significant water absorption capacity. As a result, the water that should be used for The chemical activity occurring between cement and water is diminished, so that the bond between the cement mixture as a binder and aggregate as a filler is reduced, and ultimately the concrete's compressive strength also decreases.

This study aims to analyze the transformation of the educational pattern at the Indonesian Naval Academy (AAL) from a four-year to a three-year system and its impact on graduate competencies and operational readiness. This educational system change responds to budget efficiency needs and accelerated officer formation filling, yet raises questions about the new system's ability to maintain the quality of officer education. The research employs a mixed methods approach with a concurrent embedded design, involving 250 respondents comprising graduates from both educational systems, AAL instructors, and unit commanders receiving graduates. Quantitative data were collected through structured questionnaires and analyzed using descriptive and inferential statistics (independent sample t-test and regression), while qualitative data were obtained through in-depth interviews, observations, and document studies analyzed using thematic analysis. Results indicate no significant difference in overall Grade Point Average (GPA) between the two groups (p=0.470), but significant differences in competency patterns emerged: four-year system graduates excelled in theoretical competencies (p=0.001), while three-year system graduates excelled in practical competencies (p=0.003). Operational readiness evaluation shows that four-year system graduates obtained higher scores (82.5) compared to three-year system graduates (78.3), with significant differences (p=0.012), particularly in strategic leadership and complex decision-making aspects. Qualitative analysis identified five major themes: high learning time pressure, orientation shift from comprehensive to pragmatic, gaps in character formation and corps values, concerns about theoretical understanding depth, and need for more intensive post-graduation mentoring programs. This study concludes that educational time compression successfully increased operational efficiency but involved trade-offs in learning depth and professional maturity. To optimize the three-year educational system, a comprehensive approach is required, including curriculum revision with integrated learning methods, utilization of modern learning technology, strengthening of leadership development programs, and development of continuous professional mentoring systems. The recommendations of this research are expected to provide input for AAL and the Indonesian Navy in refining the officer education system to produce officers who are not only technically competent but also mature in leadership and strong in character.

Obstructive ileus is a digestive system disorder characterized by a blockage caused by abnormalities in the intestinal lumen, intestinal wall, or foreign objects outside the intestine. Blockages in this intestinal area can cause accumulation or buildup at the site of the blockage. Patients with obstructive ileus generally experience complaints such as nausea, vomiting, abdominal distension, bowel disorders, flatus (gas) disorders, and the most common symptom is abdominal pain. The goal of this community service is to enable families to understand the definition, causes, and management of obstructive ileus and to practice applying warm compresses to minimize pain in the affected area. The methods used in this activity were counseling, interactive discussions, and practice of applying warm compresses. The media used were leaflets and flipcharts. The results obtained from this health education activity can improve patient (family) knowledge and practice in applying warm compresses to relieve pain. It is hoped that after this activity, patients (families) can apply knowledge of how to manage pain independently as an initial preventative measure to reduce pain

This study examines postpartum nursing care for mothers undergoing Sectio Caesarea (SC) with the primary nursing diagnosis of ineffective breastfeeding. The purpose is to evaluate the effectiveness of oxytocin massage intervention in improving breastfeeding outcomes in post-SC mothers. The study was conducted in Mawar Ward, RSUD dr. H. Soewondo Kendal, involving four patients experiencing delayed lactation, difficulty in baby latching, and psychological challenges such as anxiety and lack of confidence. The intervention was based on the Indonesian Nursing Intervention Standards (SIKI), focusing on observation, therapeutic actions, education, and collaboration with healthcare teams and family members. Oxytocin massage was performed 2–3 times daily, complemented by warm compresses, breastfeeding position training, and emotional support. The results indicated significant improvements: increased breast milk production, better baby latching, reduced maternal anxiety, and higher self-confidence in breastfeeding. This evidence-based approach highlights that comprehensive postpartum nursing care—integrating physical, psychological, and family support—plays a crucial role in ensuring breastfeeding success and overall maternal recovery after SC.

This study examines postpartum nursing care for mothers undergoing Sectio Caesarea (SC) with the primary nursing diagnosis of ineffective breastfeeding. The purpose is to evaluate the effectiveness of oxytocin massage intervention in improving breastfeeding outcomes in post-SC mothers. The study was conducted in Mawar Ward, RSUD dr. H. Soewondo Kendal, involving four patients experiencing delayed lactation, difficulty in baby latching, and psychological challenges such as anxiety and lack of confidence. The intervention was based on the Indonesian Nursing Intervention Standards (SIKI), focusing on observation, therapeutic actions, education, and collaboration with healthcare teams and family members. Oxytocin massage was performed 2–3 times daily, complemented by warm compresses, breastfeeding position training, and emotional support. The results indicated significant improvements: increased breast milk production, better baby latching, reduced maternal anxiety, and higher self-confidence in breastfeeding. This evidence-based approach highlights that comprehensive postpartum nursing care—integrating physical, psychological, and family support—plays a crucial role in ensuring breastfeeding success and overall maternal recovery after SC.

The soil in Kedungdandang Hamlet, Muncar, has previously been identified as expansive clay that is highly sensitive to changes in moisture content and exhibits significant shrink–swell behavior, which leads to a reduction in bearing capacity and structural damage such as cracking in floors and walls, therefore, soil improvement through stabilization is required. This study aims to determine the effect of adding cement and rice husk ash (RHA) on the mechanical properties of expansive clay soil by using 3% cement and 6%, 8%, and 10% rice husk ash based on the weight of the soil. The results of the unconfined compressive strength (UCT) test indicate that the natural soil has a qu value of 28.62 kN/m², which increases to 55.08 kN/m² with the addition of 3% cement and 6% RHA, to 62.66 kN/m² with 3% cement and 8% RHA, and reaches the highest value of 86.98 kN/m² for the mixture containing 3% cement and 10% RHA. This increase in qu value indicates that the stabilization process improves the mechanical properties of the soil through a pozzolanic reaction, resulting in a more stable soil structure and a higher bearing capacity.

Rock stability and service life in geotechnical and mining engineering are highly dependent on the rock's mechanical and physical parameters, where the variation in sandstone grain size is a crucial intrinsic factor. This study aims to comprehensively analyze the correlation between sandstone grain size with uniaxial compressive strength (UCS) and resistance to weathering (Slake Durability Index) in samples taken from the Balikpapan and Pulau Balang Formations in the Samarinda area, East Kalimantan. The research methodology involved a series of standard laboratory tests, including rock physical properties analysis, grain size distribution analysis, UCS testing, and slake durability testing through three cycles. The test results show a significant correlation: sandstone with finer grain sizes and higher density consistently demonstrates greater UCS values and a higher Durability Index, indicating superior mechanical and physical resistance. Specifically, the Pulau Balang Formation exhibits a more compact structure and finer grain size, resulting in better durability values compared to the Balikpapan Formation. These findings are important as a geomechanical data basis for slope design planning, rock mass stability analysis, and material selection in infrastructure projects or mining operations involving both formations.

Sports injuries in adolescents are a common aspect that is often experienced by the average adolescent, both male and female. Ankle sprain or ankle injury is an injury that is often experienced by teenagers when doing heavy or light sports activities. One of the treatments for sports injuries is using the PRICE method Protect (protect), Rest (rest), Ice (ice), Compress (bandage), Elevate (elevate). The purpose of this study was to increase understanding related to proper handling of sports injuries in adolescents by conducting socialization activities to deliver the material for handling these injuries, to measure the level of understanding of these students by using a pre-test questionnaire at the beginning of the activity and a post-test after the end of the activity. The results of the research that has been conducted on students and schoolgirls show an increased level of understanding with an average percentage of 5.12% and the post-test value after the delivery of the material increases with a percentage of 90%, the results of this percentage are a calculation of all questions ranging from 1-10 between the results of the post test and pre-test.

Consistent and efficient concrete quality in each implementation is one of the main factors in the success of construction projects. Concrete as a structural material requires strict quality control in order to meet the technical standards that have been set. One way to improve the quality of concrete is to add certain additives to the job mix formula (JMF). This research is focused on the application of SG type additives known as chemical-based additives to improve the properties of fresh concrete and hard concrete. SG additives have an important function in increasing workability, speeding up or slowing down the binding time as needed, maintaining quality stability, and strengthening concrete finishes. In this study, a comparison was made between a concrete mixture with SG additives and a concrete mixture without additives. The tests included slump parameters, initial binding time, and compressive strength at 7 and 28 days of age. The test results showed a significant difference, especially in the improvement of the consistency and compressive strength of concrete with the use of additives. The results of the discussion showed a comparison of Trial Mix 1 and Trial Mix 2 that are different in terms of material composition, cost efficiency, and compressive strength of concrete. Trial Mix 2 with the composition of cement, admixture, water, and aggregate (sand and split) showed more optimal results. The compressive strength achieved was 821,396.00 kg/cm² at the age of 28 days. In terms of cost, Trial Mix 2 requires Rp. 351,582.00 per m³, with an efficiency difference of around Rp. 32,953.00 per m³ compared to the previous mix

This study aims to analyze the effect of the combination of oil viscosity and shock load on the compression characteristics of telescopic shock absorbers on motorcycles, which include depth, time, and compression speed parameters. The experiment was carried out using two levels of oil viscosity, namely 10 cSt and 15 cSt (equivalent to SAE 10W and SAE 15W), as well as two shock load variations, namely 40 kg and 50 kg, which were dropped vertically from a height of 30 cm. Compression depth measurements were carried out using a slow-motion camera at a speed of 240 fps and the results were validated using Kinovea software. Meanwhile, the compression time measurement is carried out with a stopwatch, and the compression speed is calculated from the results of the comparison between the compression depth and the compression time. The experimental data were analyzed using Minitab software with the Two-Way ANOVA method to determine the influence of each variable on response. The results of the analysis showed that oil viscosity and shock load had a significant influence on the compression depth, while the viscosity of the oil also significantly affected the compression speed. However, neither the viscosity of the oil nor the shock load exerted a significant influence on the compression time. To support the results of the experiment, a mass-spring-damper system theory model approach was used, which represents the dynamic behavior of shock absorbers. This model helps to explain the compression response to changes in fluid and load parameters theoretically. Based on the analysis of experimental results and model simulations, the optimal combination that provides the best performance is found in the use of oil viscosity of 10 cSt (SAE 10W) with a shock load of 50 kg.

Waste candlenut shells are one type of biomass that has significant potential to be developed as an alternative energy source, particularly in the form of briquettes. Candlenut shells, which are typically discarded as agricultural waste, contain combustible material that can be transformed into solid fuel. However, the traditional briquette molding process is still done manually, which is time-consuming, inefficient, and often results in inconsistent briquette shapes and density. This study aims to design and develop a briquette molding machine specifically for processing candlenut shell waste, with the goal of improving both production efficiency and the quality of the briquettes produced. The research methodology includes several stages: mechanical design, selection of appropriate materials, fabrication of machine components, assembly, and performance testing of the machine. The resulting machine utilizes a screw conveyor compression system powered by a 5.5 HP petrol engine. It features a cylindrical mold with a 40 mm diameter to shape the briquettes uniformly. During the performance test, the machine demonstrated a maximum production capacity of 14.3 kg per hour, with an average processing time of 24 minutes and a briquette yield reaching up to 85%. The findings indicate that the machine can significantly streamline the briquette production process while maintaining product consistency and quality. This briquette molding machine is particularly suitable for household and small-scale industries aiming to utilize renewable energy sources and reduce dependency on fossil fuels. The use of this machine also supports environmental sustainability by converting agricultural waste into a usable energy product.  

The rapid advancement of intelligent systems has accelerated the adoption of data-driven solutions across diverse industries, creating an increasing need for models that are both efficient and privacy-preserving. While traditional centralized machine learning approaches offer strong predictive capabilities, they often struggle with challenges related to data privacy, network latency, and computational inefficiency-especially in distributed environments with heterogeneous devices. To address these limitations, recent research has explored hybrid learning frameworks that integrate federated learning, edge computing, and dynamic model optimization techniques. These hybrid approaches enable models to process and learn from data closer to the source while maintaining stringent privacy requirements by keeping raw data localized. Additionally, the incorporation of pruning strategies, adaptive model compression, or multimodal data fusion contributes to improved speed, scalability, and accuracy in real-time inference tasks. Such frameworks have demonstrated notable promise in settings characterized by high data volume, operational complexity, and the necessity for fast anomaly detection or decision-making. However, despite these advancements, several challenges remain, including synchronization delays across edge nodes, variability in hardware capabilities, and the need for more efficient aggregation algorithms. Future developments may involve leveraging next-generation pruning techniques, energy-aware edge scheduling, decentralized orchestration protocols, or the integration of digital twin technologies to further enhance performance. Overall, hybrid distributed learning frameworks represent an important evolution toward more intelligent, secure, and autonomous computational ecosystems capable of supporting the next wave of smart applications.

Back discomfort is a common musculoskeletal complaint among pregnant women, particularly in the third trimester, caused by biomechanical and physiological changes during pregnancy. This condition can interfere with daily activities, reduce sleep quality, and decrease overall comfort. Pharmacological treatments during pregnancy are limited due to safety concerns, making non-pharmacological therapies essential in primary healthcare. One alternative is the use of warm ginger compresses, which combine the benefits of heat therapy with the anti-inflammatory properties of ginger. This study aimed to examine the effect of warm ginger compresses on reducing back pain intensity in third-trimester pregnant women at the Jailolo Community Health Centre. The research used a pre-experimental one-group pretest–posttest design. The sample consisted of 16 pregnant women selected through purposive sampling. Pain intensity was measured using the Numeric Rating Scale (NRS) before and after the intervention. The treatment involved applying warm ginger compresses to the lower back following a standardized procedure. Data analysis was conducted using univariate and bivariate methods with the Wilcoxon signed-rank test. The results showed a significant reduction in back pain intensity after the intervention (p < 0.05). These findings indicate that warm ginger compresses are an effective, safe, and simple non-pharmacological method for reducing back pain in third-trimester pregnant women.

Abdominal pain is one of the main complaints frequently encountered in patients in emergency departments and inpatient wards. This condition may be caused by various factors, ranging from gastrointestinal disorders and inflammation to reproductive system problems. Poorly managed pain can affect the patient’s quality of life, reduce daily activities, and increase anxiety. This case study aims to describe nursing care for Mrs. U, who presented with abdominal pain at dr. Soeselo Hospital, Tegal Regency. The research method applied was a case study with a nursing process approach, including assessment, diagnosis, intervention, implementation, and evaluation. The assessment revealed that the patient complained of lower abdominal pain with a pain scale of 5 (moderate), accompanied by nausea, weakness, and intermittent fever. The primary nursing diagnosis established was acute pain related to physiological injury agents. Interventions included pain management education, relaxation techniques, application of warm compresses, and collaboration in administering analgesics. The evaluation showed a decrease in pain intensity from a scale of 5 to 3, with the patient appearing calmer and showing improved sleep quality. This study emphasizes the crucial role of nurses in providing comprehensive care to reduce abdominal pain through both independent and the collaborative interventions with the medical team.

Non-Communicable Diseases (NCDs) remain the leading cause of global morbidity and mortality, and one of the chronic conditions included in this group is rheumatoid arthritis (RA). RA is an autoimmune disease that affects the synovial joints, resulting in persistent inflammation, chronic pain, stiffness, and eventual deformities if left untreated. In Indonesia, the burden of RA continues to grow; the prevalence reaches 11.9% based on clinical diagnosis and rises to 24.7% when measured using symptom-based diagnosis. This case study aimed to describe family nursing care for a client with RA through a structured nursing process approach to improve quality of life and family involvement. The study took place in Purwodadi Village, Tonjong Subdistrict, Brebes Regency, focusing on the family of Mr. AS with Mrs. W as the client diagnosed with RA. Data collection involved comprehensive interviews, direct observation, physical examination, and documentation review. Assessment findings included chronic pain with an intensity score of 4, limited mobility, and inadequate family knowledge regarding RA management. Nursing interventions implemented were family education on RA, simple rheumatic exercises tailored to the client’s ability, and the application of warm ginger compresses as a non-pharmacological pain relief method. Post-intervention evaluation showed pain reduction to a score of 2, improved independence in performing light daily activities, and enhanced family understanding and support. In conclusion, family-centered nursing care combined with non-pharmacological interventions can effectively reduce pain, improve mobility, and strengthen the family’s role in supporting RA management.

A fracture is a condition where the continuity of the bone is disrupted due to a hard impact, often causing significant pain in sufferers. Pain management does not only rely on pharmacological therapy but can also be combined with non-pharmacological therapies, one of which is through cold compresses using ice packs. This therapy is effective because it can reduce pain nerve conduction and reduce blood flow to the injured area, thereby suppressing pain. This activity aims to provide public education on the use of cold compresses as an alternative pain management in fracture cases. Before the activity began, vital signs were measured and a pain scale was assessed as a basis for evaluation. The education was carried out using leaflets by a team of lecturers and nursing students to 30 village community participants. Based on interviews, most participants had never received information about the benefits of cold compresses in pain management. Before the education, 23 participants were accustomed to managing pain with pain relievers, while the other 7 used other non-pharmacological methods such as hot compresses, deep breathing relaxation, and behavioral therapy. After participating in the activity, the community demonstrated an understanding that cold compresses using ice packs applied for 20 minutes when pain occurs can be a simple, inexpensive, and effective method for reducing pain caused by fractures. This activity involves village officials and the community as a collaborative effort to improve health literacy. It is hoped that the community will be able to implement cold compress therapy as a self-help option for managing fracture pain, thereby reducing reliance on analgesic medications.

Craniotomy is a medical procedure to open the skull in order to repair and assess damage to the brain, which can cause fever due to thermoregulatory disturbances in the central nervous system. Monitoring the body temperature of post-craniotomy patients is crucial, as hyperthermia can increase the risk of complications. One non-pharmacological therapy to reduce fever is the use of ice gel compresses. This study aims to compare the effect of ice gel compress placement between the chest and armpit on body temperature changes in post-craniotomy patients in the ICU of RSI Sultan Agung Semarang. This research uses a pre-experimental design with a two-group pretest-posttest design, involving 22 respondents selected through total sampling technique. Data were collected using observation sheets, and statistical analysis was performed using the Paired Samples Test. The analysis results showed that the p-value for the chest was 0.867 (p > 0.05) and for the armpit was 0.199 (p > 0.05), indicating no significant difference in body temperature before and after the ice gel compress at both locations in relation to the body temperature changes of post-craniotomy patients. In conclusion, the application of ice gel compresses to the chest and armpit locations did not show a significant effect on reducing body temperature in post-craniotomy patients.

Hemodialysis is a medical procedure used to correct blood biochemical abnormalities caused by impaired kidney function, with the aid of a hemodialysis machine. One of the most commonly used accesses in this procedure is the Arteriovenous Fistula (AVF), which is an anastomosis between the artery and vein in the arm or other parts of the body to facilitate the cannulation process. However, during the AVF cannulation procedure, patients often experience pain, which can cause discomfort and anxiety. Cold compresses are one of the non-pharmacological techniques that can be used to alleviate this pain. This study aims to examine the effect of cold compresses on reducing pain during AVF cannulation in hemodialysis patients. This research uses a Quasi-Experimental design with a Pretest-Posttest Control Group Design model, involving 116 hemodialysis patients at RSI Sultan Agung Semarang. Patients were divided into two groups: the intervention group, which received cold compresses, and the control group, which did not receive treatment. Pain intensity was measured before and after cannulation using a visual analog scale (VAS). The results of the study show that the administration of cold compresses significantly reduced pain intensity, with a p-value of 0.000 (< 0.05). In addition, there was a significant difference in effectiveness between the intervention group and the control group, with the same p-value. In conclusion, cold compresses proved to be an effective, simple, safe, and easy-to-apply non-pharmacological intervention to reduce pain in hemodialysis patients during the AVF cannulation procedure. Therefore, the use of cold compresses can be recommended as a method to improve the comfort of hemodialysis patients.

Rheumatoid arthritis (RA) is a chronic autoimmune disease that primarily affects the musculoskeletal system and often causes severe pain and functional limitations, especially among the elderly. This study aimed to provide a comprehensive overview of nursing care for a patient diagnosed with RA through a family-based approach. The research employed a descriptive qualitative method with a case study design conducted in a rural village in Brebes, Central Java. Data were collected through in-depth interviews, observation, and documentation. The results showed that the integration of non-pharmacological interventions, including warm compresses using ginger and lemongrass, and deep breathing techniques, significantly reduced pain intensity. Additionally, increased family involvement in caregiving, facilitated by structured health education, enhanced the patient's quality of life. This study confirms the importance of applying Dorothea Orem’s Self-Care Deficit Theory to support the independence and well-being of RA patients within their home environments. The findings suggest that community nurses should prioritize family empowerment in chronic disease management, particularly in areas with limited health access.

This study analyzes the potential use of cockle shell waste and coal fly ash as alternative raw materials in the production of composite brake pads. The high volume of industrial and fisheries waste, which has not been optimally utilized, encourages the exploration of environmentally friendly materials with adequate mechanical performance. The main focus of this research is the compressive strength of the produced brake pads, as this parameter is crucial for ensuring effective and safe braking performance. The method used includes the mixing and molding of composite materials with varying compositions of cockle shell and fly ash, followed by compressive strength testing according to standards. This study also takes into account the environmental impact of using waste as filler material, which is expected to reduce reliance on conventional materials and decrease waste that contaminates the environment. The results of the study are expected to provide empirical data on the potential of these two wastes as fillers in brake pad matrices and to identify the optimal formulation that provides the highest compressive strength. This study contributes to the development of sustainable braking materials and efforts to mitigate the environmental impact of waste, while also opening opportunities for the reuse of waste that has previously been poorly managed.