Abstract:This study aims to analyze the relationship and influence of coal quality parameters which include Total Moisture (TM), Ash Content (ASH), and Total Sulfur (TS) on Gross Calorific Value (GCV). The data used in this study…
is data from laboratory tests on 23 samples of Run Of Mine (ROM) coal at seam 16 at PT Unggul Nusantara, North Barito Regency, Central Kalimantan. Data analysis was performed statistically using the help of SPSS software through Pearson correlation test and multiple linear regression analysis. The results of the correlation test showed that simultaneously, the TM, ASH, and TS parameters had a very strong relationship with the GCV value with a correlation coefficient (R) of 0.893 and contributed an influence of 76.5%. Partially, Ash Content (ASH) had a very strong negative relationship (r = -0.881) and had a significant effect on calorie values (p = 0.000). Each 1% increase in ash content would decrease the GCV value by 68.249 Kcal/Kg. Meanwhile, Total Moisture had a significant positive relationship by simple correlation (r = 0.506, p = 0.014), but showed no partial significant effect in multiple regression models (p = 0.364). Total Sulfur was found to have a very weak negative relationship (r = -0.182) and had no significant effect on GCV values (p = 0.406). This study concludes that Ash Content is the most dominant parameter that affects the reduction of the caloric value of coal seam 16 at PT Unggul Nusantara.
Abstract:Mathematics learning plays an important role in developing logical thinking and problem-solving skills. However, for deaf students, understanding mathematical word problems remains a fairly complex challenge, mainly due…
to limitations in language and communication aspects. This study aims to examine the characteristics of the difficulties experienced by deaf students, analyze the implementation of the learning strategies used, and investigate their effectiveness in improving understanding of mathematical word problems. This research employs a qualitative approach using a literature study method. The findings indicate that the main difficulties lie in understanding the language used in the problems, identifying important information, and transforming it into mathematical models. Effective learning strategies tend to be visual, contextual, and communicative, supported by the use of interactive media. Nevertheless, the use of media alone is not sufficient without well-structured instructional strategies. These findings emphasize that the integration of adaptive learning strategies plays a more significant role in improving deaf students’ understanding of mathematical word problems.
Abstract:This study examines how core marching band structures can be adapted for Indonesian early childhood education through developmentally appropriate practice and performance theory. The study responds to concerns that preschool…
hool marching band activities may reproduce discipline-oriented rehearsal models designed for older learners. A one-group pre-test and post-test mixed-methods design was used with twenty Indonesian preschool children aged four to five years. Over six weeks, children participated in twelve adapted marching band sessions that combined simplified rhythmic patterns, child-scaled instruments, neat but developmentally adjusted formations, cooperative music-making, visual-motor activities, and responsive teacher facilitation. Quantitative data were collected using a four-point developmental observation rubric covering rhythmic competence, motor coordination, and socio-emotional engagement. Qualitative data were obtained from teacher reflective journals and post-intervention interviews. Paired-sample analysis showed higher post-test scores across the three developmental domains. The largest observed improvement appeared in socio-emotional engagement, followed by rhythmic competence and motor coordination. However, because the study did not include a control group, the findings should be interpreted as developmental changes observed after participation rather than definitive causal effects of the intervention. Qualitative findings indicated that children participated more confidently when teachers simplified rhythmic tasks, used clear and neat formations with reduced technical pressure, provided child-scaled instruments, supported safe movement, and acted as co-players and emotional co-regulators. The study reconceptualizes marching band routines not as rigid disciplinary scripts, but as adaptable performative frames that may support social participation, emotional regulation, rhythmic learning, motor coordination, cooperation, and creative agency when aligned with children’s developmental readiness.
Abstract:Karstification is the dominant geological process controlling groundwater circulation and permeability in carbonate aquifers. Through the dissolution of carbonate rocks, karst processes create highly heterogeneous systems…
s characterized by fractures, conduits, and interconnected channel networks that significantly influence groundwater flow dynamics. This literature review aims to synthesize current knowledge regarding the effects of karst on water circulation and permeability in carbonate aquifers based on hydrogeological, hydrochemical, geophysical, and numerical modeling studies from various regions worldwide. The review shows that karstification substantially enhances hydraulic conductivity and produces complex flow regimes ranging from diffuse fracture flow to turbulent conduit flow. The epikarst zone plays an important role in regulating infiltration and recharge distribution, while tectonic structures such as faults and fractures strongly control groundwater pathways and aquifer compartmentalization. Karst aquifers also exhibit strong spatial variability in permeability, making groundwater flow and contaminant transport difficult to predict using conventional hydrogeological approaches. In addition, the integration of equivalent porous medium (EPM), discrete fracture network (DFN), and conduit network (CN) models is essential for accurately representing karst aquifer behavior. Understanding the influence of karstification on groundwater circulation is therefore crucial for sustainable groundwater management and aquifer vulnerability assessment, particularly in regions facing increasing water demand and climate change pressures.
Abstract:This study aims to analyze the determinants of dividend policy and their implications for stock returns among companies listed on the Indonesia Stock Exchange (IDX) during the 2019–2024 period. Specifically, the study examines…
examines the effects of Return on Assets (ROA), Current Ratio (CR), Debt-to-Equity Ratio (DER), Sales Growth (SG), and Firm Size (SIZE) on Dividend Payout Ratio (DPR), as well as the impact of DPR on stock returns. The research employs a quantitative approach using secondary data obtained from the annual financial reports of dividend-paying companies listed on the IDX. The sample consists of 822 firm-year observations selected through purposive sampling. Data analysis was conducted using path analysis with multiple regression models, supported by classical assumption tests including normality, heteroscedasticity, multicollinearity, and autocorrelation tests. The results indicate that during the overall period of 2019–2024, ROA, DER, and SG significantly and negatively affect DPR, while CR and SIZE do not have significant effects. Furthermore, CR negatively affects stock returns, whereas SG and DPR have positive and significant effects on stock returns. The findings also reveal that the relationships among financial performance, dividend policy, and stock returns vary across pre-crisis, crisis, and post-crisis periods. Overall, dividend policy plays an important mediating role in influencing stock returns, particularly during and after periods of financial uncertainty. These findings provide valuable insights for investors, corporate managers, and policymakers in formulating dividend and investment decisions under different economic conditions.
Abstract:This study describes the strategies and mentoring model implemented by HIMPAUDI in Krui, West Pesisir Regency, to improve the professionalism of early childhood education teachers. This research employed a descriptive qualitative…
alitative approach, with primary data collected through a structured interview with a HIMPAUDI board member in West Pesisir Regency. The findings show that HIMPAUDI mentoring is carried out through tiered training, curriculum and learning workshops, teacher working groups, seminars, mentoring, supervision, sharing of good practices, and socialization of professional ethics. The mentoring model is participatory, collaborative, continuous, needs-based, reflective, and ethical-professional. These activities strengthen teachers pedagogical, professional, social, and personal competencies, particularly in understanding child development, designing creative learning, developing learning media, adapting the curriculum, and maintaining professional responsibility. However, implementation is constrained by limited time, training costs, unequal access to information, varied teacher motivation, digital competence, and coastal geographical conditions. The study recommends strengthening local professional development through professional learning communities, mentoring cycles, digital support, and institutional collaboration among HIMPAUDI, local government, higher education institutions, and early childhood education providers.
Abstract:This study aims to develop and examine the effectiveness of religious moderation in digital media based on the Dick and Carey learning model. The research is grounded in the increasing use of digital media as a primary source…
ource of religious information, which has the potential both to strengthen and to undermine the values of religious moderation. The study employed a qualitative approach with a Research and Development (R&D) design. The subjects were university students who actively use digital media. Data collection techniques included interviews, observations, questionnaires, and documentation, while data analysis followed the Miles and Huberman model. The results indicate that students’ understanding of religious moderation remains largely normative and is not yet accompanied by adequate digital literacy skills. The development of the Dick and Carey-based learning model produced interactive digital media, including educational videos, digital modules, and social media content. Implementation of the model demonstrated a significant improvement in students’ comprehension, tolerance, and critical thinking regarding religious content in digital media. Furthermore, the study found that integrating constructivist approaches, social learning, and digital literacy into the learning design effectively reinforced the internalization of religious moderation values. The developed learning model proved effective in enhancing student engagement and fostering inclusive and tolerant attitudes.In conclusion, promoting religious moderation in digital media requires a systematic, technology-based learning approach. This study provides both theoretical and practical contributions to the development of a learning model for religious moderation in the digital era.
Abstract:The creative service industry, particularly wedding organizer services, has experienced significant growth in Indonesia due to changing lifestyles, increasing consumer expectations, and rising demand for professionally managed…
anaged wedding events. This study aims to analyze the Business Model Canvas (BMC) as a business strategy at Win Production Wedding Organizer in Bandar Lampung City. The Business Model Canvas, introduced by Osterwalder and Pigneur (2010), is used as a strategic framework to examine nine key business elements: customer segments, value propositions, channels, customer relationships, revenue streams, key resources, key activities, key partnerships, and cost structure. This research employs a qualitative descriptive approach, with data collected through interviews, observations, and documentation involving business owners, employees, and customers. Data validity was ensured using triangulation techniques. The findings indicate that Win Production targets middle and upper-middle income couples as its primary customer segment and offers integrated, professional, and flexible wedding services tailored to client needs. The business model demonstrates strong alignment across all nine BMC components, contributing to enhanced competitiveness and business sustainability. The study confirms that Business Model Canvas is an effective strategic tool for analyzing and improving business models in service-based industries, particularly wedding organizer businesses operating in competitive local markets.
Abstract:The rapid growth of the global affordable luxury fashion segment presents a critical paradox, as luxury brands increasingly target culturally diverse consumers who interpret the meaning of luxury in fundamentally different…
nt ways. This phenomenon becomes particularly evident when comparing collectivist markets such as Indonesia with individualistic markets such as Australia, where uniform value propositions often fail to resonate equally. This study aims to examine the influence of cultural context on Luxury Value Perception (LVP) and Purchase Intention, as well as the moderating role of Individualism–Collectivism orientation among affordable luxury fashion consumers in Indonesia and Australia. A quantitative survey-based approach was employed and analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM), complemented by Measurement Invariance of Composite Models (MICOM) and Multi-Group Analysis (MGA). The findings are expected to provide empirical insights into how cultural differences shape luxury value perceptions and purchase intentions, offering strategic implications for affordable luxury fashion brands in developing culturally adaptive value propositions.
Abstract:This study examines the development of business models and strategic innovation as key mechanisms for enhancing the competitiveness of Micro and Small Enterprises (MSEs) in Indonesia. Using a qualitative descriptive approach,…
oach, the research analyzes how MSEs adapt to changing market dynamics, consumer preferences, and digital transformation pressures. The findings reveal that innovation in value propositions, customer engagement, and digital marketing plays a significant role in improving business performance. The study also highlights that many MSEs have not yet implemented structured business model frameworks, resulting in limited scalability and reduced competitiveness. The analysis is grounded in the Business Model Canvas (BMC) framework, which is used to identify strategic gaps and opportunity areas. The study concludes that strengthening business models through innovation, partnership development, and digital integration can significantly enhance MSE sustainability and long-term competitiveness.