John Tampil Purba

This study aims to determine the effect of TPACK-based differentiated learning on high school students' problem-solving abilities and motivation. The study, conducted at Private Senior High School PAB 8 Saentis Sei Tuan, used a quasi-experiment method with two classes: the experimental class, which used the differentiated problem solving model based on TPACK, and the control class, which used the conventional school learning model without differentiation. The results of this study indicate that the average post-test score for student problem-solving abilities in the experimental class was higher than in the control class. Statistical testing using two-way ANOVA showed that the problem-solving skills of students taught with the TPACK-based differentiated learning model demonstrated a significant influence between the learning model and motivation on students' problem-solving skills, as well as an interaction between the TPACK based problem posing learning model and motivation in terms of problem-solving skills. These findings have practical implications for educators, providing evidence that the TPACK-based differentiated problem-posing learning model is more effective in improving students' problem solving abilities than the conventional learning model, with learning motivation also playing an essential role in enhancing student problem-solving skills.

This systematic literature review (SLR) aims to identify the key determinants influencing corporate sustainability in the energy sector. The review synthesizes findings from 54 peer-reviewed articles sourced from the Scopus database. The study adopts the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) framework, ensuring a rigorous methodological process through clearly defined inclusion criteria, comprehensive database searches, and systematic screening and selection of relevant studies. The review reveals that corporate sustainability in the energy sector is driven by both external and internal factors. Key external determinants include climate change awareness, regulatory compliance, stakeholder pressure, sustainability reporting quality, risk perception, market and competition dynamics, and government support. Internal factors consist of technology adoption, strong leadership, top management support, business transformation, firm size, human resource management, organizational culture, service delivery, service innovation capability, and dynamic capability. This review contributes to the understanding of corporate sustainability in the energy sector by offering practical implications for industry stakeholders and policymakers, supporting the development of sustainable practices and long-term sustainability strategies.

In today's dynamic and competitive business environment, organizations must continuously adapt to external and internal changes to achieve corporate sustainability. This study examines the influence of Business Transformation (BT), Service Innovation Capability (SIC), and Service Delivery (SD) on Corporate Sustainability (CS), with Dynamic Capability (DC) as a mediating variable and Digital Transformation (DT) as a moderate factor. Employing Resource-Based View (RBV) and Market-Based View (MBV) theories, this study aims to explore how firms leverage internal capabilities and external market factors to drive long-term sustainability. A quantitative research design was applied, utilizing "This study employed Partial Least Squares-Structural Equation Modeling (PLS-SEM) to test the proposed hypotheses, utilizing data collected from 400 managers." and executives in the energy sector, with a focus on PT PLN (Persero). The findings confirm that BT, SIC, and SD positively influence CS, both directly and indirectly through DC. Furthermore, DT significantly moderates the relationships between BT, SIC, and SD with DC, indicating that digital adoption enhances firms' ability to adapt and reconfigure resources. The mediating role of DC was also supported, reinforcing its importance in linking strategic initiatives to sustainability outcomes. This study contributes to strategic management literature by integrating RBV and MBV perspectives while providing empirical evidence on DT as a catalyst for corporate sustainability. Practically, the results highlight the importance of firms investing in digital capabilities.", service innovation, and dynamic adaptation strategies to remain competitive. Future research should explore longitudinal effects and industry variations in digital transformation and sustainability practices.

This research explores the role of culture-based leadership in enhancing the quality of human resources in Sekolah Penggerak (model schools) in North Lombok, Indonesia. The study specifically focuses on the cultural wisdom of Tioq, Tata, and Tunaq (3T) inherent to the Sasak community and its integration into the leadership practices of elementary school principals. Employing a qualitative multi-case study approach, the research investigated how 3T influenced the leadership styles and effectiveness of principals in five selected elementary model schools. Data were collected through interviews, observations, and societal outcomes. The research underscores the importance of local cultural values in shaping effective leadership and promoting sustainable educational development. The study contributes to the literature on educational leadership by presenting a new model of leadership that integrates local cultural wisdom. This model can serve as a valuable reference for other regions in Indonesia and similar cultural contexts. The implications suggest that educational leadership development programs should incorporate local cultural values to address contextual challenges and improve the quality of education holistically.

This research uses panel data covering 34 provinces for 13 periods from 2009 to 2021. Foreign direct investment has an important role not only in improving Indonesia's economic position compared to other countries but also as a driver for the sustainability of Indonesia's business and economy. The researchers analyse the extent to which gross domestic regional product (GDRP), domestic investment, the Gini coefficient, and literacy influence foreign direct investment (FDI) inflow into Indonesia. The authors choose the best model among various alternatives, namely, pool, fixed effects, and random effects regression with the Chow and Hausman test methods. Through the best model, namely, refined random effects, the authors prove that GDRP, regional domestic investment, regional Gini coefficient, and regional literacy influence the increase in Indonesia's FDI. This research contributes to the theoretical gap, practical knowledge gap, and empirical gap. The results of this research have a new insight that knowledge and skills, innovation, and a supportive economic situation are the keys to successful business investment movements.

Purpose: The implications of external environment changes and the presence of a new generation of students in the school to the school leadership are often overlooked. Very few studies elaborate on the need to shape educational leadership concepts and practices to deal with the changes. The study intention is to identify the influences of transformative learning, affective commitment, digital transformation, capability dynamic, and the ambidexterity to educational leadership, and to craft the educational leadership based on Indonesia context. Design/Methodology/Approach: The study is using Covariance Based Structural Equation Modelling (CB-SEM), the data is collected through a Likert based questionnaire from 271 respondents and it is processed by SPSS and AMOS. Findings: Transformative Ethics Agile (TEA) Leadership as educational leadership is influenced by Ambidexterity, transformative learning, affective commitment, and educational policy. Digital transformation and capability dynamic have insignificant influences, however ambidexterity mediating the influence of dynamic capability to TEA Leadership. Research Implications: The research contributes to renewing educational leadership concepts by putting emphasis on transformative, ethics, and agile elements. The variables that must be put into attention for leading school during changing time, specifically ambidexterity, transformative learning, affective commitment, and educational policy. The research highlights the importance of context on educational leadership. Originality/Values: The research contributes to the identification of variables that influence the effectiveness of school leadership and by doing that able to facilitate the strategy of leadership development for school management. The values of the research are on the mapping of factors contribute to educational leadership and lead the practical aspects of managing school in the changing time.

Objective: While environmentally friendly products and brands are widely available, consumer adoption and usage of these products remain relatively low, highlighting disconnection between pro-environmental values and actual green practices related to green brand. This discrepancy is attributed to biased perceptions toward green brands. This study aims to address the perception bias issue in the relationship between pro-environmental values and behaviors, focusing on green personal care brands. Theoretical framework: Based on Stimulus Organism Response theory combined with Self-Verification Theory, Consumer Culture Theory and Social Exchange theory, this study proposes that individual factors such as Environmental Self-Identity and brand related factors such as Self-Green Brand Connection, Brand Trust, and Green Brand Experience play crucial roles in influencing Green Brand Evangelism with Green Brand Experience acting as a mediator in these relationships. . Method: Utilizing a non-probability purposive sampling approach, data was collected from 404 respondents through an online questionnaire using a 1-7 Likert scale. The Partial Least Squares Structural Equation Modeling (PLS-SEM) method was employed for data analysis. Results and conclusion: The findings of this research indicate that Green Brand Experience significantly mediates the impact of Environmental Self-Identity, Self-Green Brand Connection, and Brand Trust, on Green Brand Evangelism. This study represents a pioneering effort in examining the influence of Environmental Self-Identity on Green Brand Experience and Green Brand Evangelism. And the first attempt in investigating the mediating role of Green Brand Experience in shaping Green Brand Evangelism. This research contributes to a better understanding of how social-constructed green brand experiences can foster Green Brand Evangelism among consumers.

In ancient times, humans listened to music using music records in the form of discs that were quite large. Then it developed into smaller discs, then added cassettes and radio. In this modern era, music preservation is received through online applications, and one application that provides these services is Spotify. But this success does not cover the importance of service factors to compete with other brands competitively. Therefore, this study uses quantitative methods to examine the factors influencing consumer loyalty as seen from the community's involvement, experience, Trust, and commitment to the Spotify brand. The Sampling technique uses a non-probability sampling approach. Data was collected using a purposive sampling technique, taking 351 respondents with had experience using the Spotify application. The measurement model for the inner model in this study was analyzed using AMOS 26. In the internal model, testing was discovered by using this study's R2, discriminant, and fitness models. The outer model research includes validity and reliability tests done with SPSS 26 application In ancient times, humans listened to music using music records in the form of discs that were quite large. Then it developed into smaller discs, then added cassettes and radio. In this modern era, music preservation is received through online applications, and one application that provides these services is Spotify. But this success does not cover the importance of service factors to compete with other brands competitively. Therefore, this study uses quantitative methods to examine the factors influencing consumer loyalty as seen from the community's involvement, experience, Trust, and commitment to the Spotify brand. The Sampling technique uses a non-probability sampling approach. Data was collected using a purposive sampling technique, taking 351 respondents with had experience using the Spotify application. The measurement model for the inner model in this study was analyzed using AMOS 26. In the internal model, testing was discovered by using this study's R2, discriminant, and fitness models. The outer model research includes validity and reliability tests done with SPSS 26 application. Abstrak. Pada zaman dahulu, manusia mendengarkan musik dengan menggunakan rekaman musik berbentuk cakram yang berukuran cukup besar. Kemudian berkembang menjadi cakram yang lebih kecil, kemudian ditambah kaset dan radio. Di era modern ini, pelestarian musik diterima melalui aplikasi online, dan salah satu aplikasi yang menyediakan layanan tersebut adalah Spotify. Namun keberhasilan tersebut tidak menutupi pentingnya faktor pelayanan untuk bersaing dengan merek lain secara kompetitif. Oleh karena itu, penelitian ini menggunakan metode kuantitatif untuk menguji faktor-faktor yang mempengaruhi loyalitas konsumen dilihat dari keterlibatan komunitas, pengalaman, Kepercayaan, dan komitmen terhadap merek Spotify. Teknik pengambilan sampel menggunakan pendekatan non-probability sampling. Pengumpulan data dilakukan dengan teknik purposive sampling, dengan mengambil 351 responden yang mempunyai pengalaman menggunakan aplikasi Spotify. Model pengukuran inner model pada penelitian ini dianalisis menggunakan AMOS 26. Pada internal model ditemukan pengujian dengan menggunakan model R2, diskriminan, dan fitness penelitian ini. Penelitian model luar meliputi uji validitas dan reliabilitas yang dilakukan dengan aplikasi SPSS 26.

Many Korean missionaries worldwide serve the local community by demonstrating leadership through Korean language teaching. This paper aims to understand the influence of transformational (TF) leadership and transactional (TS) leadership of Korean missionaries on teachers’ job satisfaction (JS) in Korean Language and Culture Centers (KLCCs), with shinbaram (SH) as a Korean ethnic factor as the intervening variable. This research used the Structural Equation Model (SEM) method to analyze 133 samples of KLCC teachers in 23 countries. The findings showed that the TF leadership did not significantly influence the KLCC teachers’ JS, but it did have an influence through the effect of SH intervention. In contrast, the TS leadership directly influenced the KLCC teachers’ JS significantly, but it did not have an influence through the effect of SH intervention. The TF leadership influenced the SH significantly, although the TS leadership did not. In other words, if the TF leadership was implemented in the KLCCs, the teachers’ JS could be improved only when the SH was applied to the organizational culture. Also, this study confirms that the SH directly influenced the KLCC teachers’ JS. These results demonstrate the role of SH as social psychological energy in strengthening JS in a non-profit educational organization whose leaders are missionaries, such as the KLCCs. Non-profit organizations with relatively weak compensation systems should utilize the SH as a catalyst to improve the teachers’ JS.

Objective: This research is designed to propose empirical evidence on factors affecting stock selection ability and market timing ability. Theoretical framework: Recent research found that most equity mutual funds underperform the market return due to a lack of stock selection and market timing abilities. However, rarely do they propose evidence of factors affecting the existence of these abilities Method: There are two-panel regression models developed in this research to show evidence of factors affecting stock selection and market timing abilities. The Dumitrescu–Hurlin (DH) test is used to gain a comprehensive understanding of the causality relationship between the variables Results and Conclusion: Based on observation of three ASEAN countries, this research proposes empirical evidence that the growth of fund size, volatility of the fund’s net asset value (NAV), and performance indicators of the underlying assets affect the stock selection ability differently in the respective countries. Similarly, the growth of fund size, volatility of the fund’s NAV, and macroeconomic indicators also affect the market timing ability differently Implications of the research: Therefore, the implementation of investment strategies in the three observed markets considers factors affecting the existence of the two abilities, effectively generating outperforming returns. Originality/value: Recent studies focused more on whether equity mutual funds are managed with stock selection and market timing abilities but not on factors affecting those abilities. This research proposes empirical evidence on factors affecting those abilities in different markets through econometrics analyses on panel data and the Dumitrescu–Hurlincausality test.