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The Indonesian Naval Academy (AAL) as a military educational institution requires a large electricity supply to support its operational activities, including in the Sapudi Building of the Engineering Department. This study aims to design a solar energy system to supply the electricity needs for lighting in the building. The method used is Research and Development (R&D) with the ADDIE model (Analysis, Design, Development, Implementation, Evaluation). Data collection was conducted through direct observation of building conditions, electrical equipment, and solar radiation intensity data in Surabaya. The research results show that the total electricity requirement for lighting in the Sapudi Building is 4.686 kW with a total of 143 lights (96 neon lights and 47 light bulbs). Based on calculations with an average solar radiation of 5.00 kWh/m²/day, the designed system requires 41 units of Solar PV Lesso HPM 550W panel type with 21.3% efficiency and 9 units of Panasonic LC-P12100NA batteries with a capacity of 100Ah arranged in 3 series and 3 parallel configurations. This study proves that the utilization of solar energy can be an efficient and sustainable alternative solution to reduce dependence on conventional electricity in the AAL environment, while supporting the implementation of renewable energy in Indonesian military institutions.

The rapid growth of amateur football clubs in Surabaya presents great opportunities for talent development and social cohesion, but it also comes with managerial challenges such as unclear organizational structure, lack of financial transparency, limited promotion, and the absence of operational standards for matches. This article presents the results of a community service program based on capacity building, designed to strengthen the managerial capacity of amateur football club managers in Surabaya. The activities focused on a one-day face-to-face workshop for representatives from 30 clubs, utilizing interactive lectures, local case studies, targeted discussions, and the distribution of practical handouts including organizational structure templates, code of conduct, one-page financial reports, content calendars, and matchday checklists. The core materials covered five areas: governance & legal, planning & OKR, finance & accountability, marketing & sponsorship, and operations & safeguarding. The program concludes that a brief, capacity-building workshop can trigger the initial professionalization of amateur football clubs through measurable, easy-to-adopt, and replicable minimum viable governance practices. These findings are relevant as a model for strengthening governance and management of amateur clubs in Indonesia, while also supporting a more professional, accountable, and sustainable community sports ecosystem.

The rapid development of financial technology has transformed transactional behavior, particularly among Generation Z. Easy access through mobile banking, particularly BCA Mobile, has made financial activities more practical but also poses risks of consumptive behavior due to low financial literacy and self-control. This study aims to analyze the influence of Financial Literacy, Lifestyle, and Locus of control on Financial Behavior, with Financial technology as a moderating variable. The research population consists of Generation Z users of BCA Mobile in Surabaya. A total of 147 respondents were selected using purposive sampling based on specific criteria. Data were collected through questionnaires and analyzed using the Partial Least Squares–Structural Equation Modeling (PLS-SEM) approach. The findings show that Financial Literacy and Locus of control have a significant positive effect on Financial Behavior, while Lifestyle has a significant negative effect. Furthermore, Financial technology is proven to moderate the influence of Financial Literacy and Locus of control on Financial Behavior, but not the relationship between Lifestyle and Financial Behavior.  

E-Tendering is an electronic-based procurement method that integrates all parties involved in construction projects through a digital platform, simplifying communication, document exchange, and transactions from the initial stage to project completion. The primary objective of implementing E-Tendering in the construction sector is to improve efficiency and transparency in the procurement process of goods and services. However, construction service providers often face obstacles in E-Tendering, such as limited technological proficiency, administrative errors that may disqualify bids, and technical issues like internet connectivity and platform system reliability. Therefore, this research aims to identify the barriers and level of understanding of E-Tendering among construction service providers in Surabaya. A total of 51 respondents were selected using snowball sampling, based on their participation in the E-Tendering system. Data processing in this study employed a quantitative approach using the Fuzzy AHP method to analyze the criteria and sub-criteria related to understanding and obstacles in participating in electronic construction service tenders (E-Tendering). The results of the analysis of service providers’ understanding of the E-Tendering system using the AHP method showed a λmax value of 9.09, a Consistency Index (CI) of 0.01, and a Consistency Ratio (CR) of 0.007. The CR value, which is far below the threshold of 0.10, indicates that the respondents’ assessments are consistent, meaning that the pairwise comparison results of the nine criteria can be considered valid and reliable.

Delays in high-rise building construction projects in Surabaya are a crucial issue as they can significantly affect cost, quality, and project completion schedules. This reserach intends to identify the dominant factors contributing to project delays using the Relative Importance Index (RII) method, considering both frequency and impact aspects. Data were obtained from 80 valid respondents who hold strategic roles in construction project implementation, such as Project Managers, Site Managers, Site Engineers, Estimators, Field Supervisors, General Managers, and Company Directors. The analysis results indicate that in terms of frequency, the dominant factors are unfavorable weather conditions (RII = 0.750), labor shortages (RII = 0.743), and design changes during construction (RII = 0.735). Meanwhile, in terms of impact, the dominant factors are delays in material delivery (RII = 0.780), labor shortages (RII = 0.770), and substandard material quality (RII = 0.740). These findings emphasize that labor shortage consistently influences project delays in both frequency and impact, while weather and material factors show different patterns between occurrence and consequence. All dominant factors were classified into the High-Medium category, indicating that they should be prioritized in project risk management.

This study aims to analyze the influence of student organizations, role conflict, and self-regulation on student academic achievement. This study uses a quantitative approach with a survey method. The research sample consisted of 200 students of the Faculty of Economics and Business, Universitas Negeri Surabaya(Unesa) who are active in student organizations. Data collection was conducted through distributing questionnaires with a Likert scale. Data analysis used multiple linear regression, accompanied by tests of validity, reliability, normality, multicollinearity, and heteroscedasticity. The results showed that student organizations have a positive effect on student academic achievement. Role conflict has a negative effect on achievement. And self-regulation has a positive effect on academic achievement. All three variables simultaneously have a significant effect on academic achievement. The results of this study confirm that involvement in student organizations can have a positive impact on academic achievement if combined with strong self-regulation skills and effective role conflict management. Therefore, developing self-regulation skills and time management training should be part of student organization development programs in higher education.

In modern soccer, lower-limb power is a crucial component that determines an athlete’s performance in sprinting, kicking, and jumping. This study aimed to compare the effects of Squat jump and Hexagon jump plyometric exercises on lower limb power in youth soccer athletes from Garuda Timur Football Academy Surabaya. The research employed a quasi-experimental method with a pretest–posttest two group design involving 12 athletes aged 14–17 years. Participants were divided into two groups of six: a Hexagon jump group and a Squat jump group. Lower limb power was assessed using the vertical jump test before and after the training intervention. Data were analyzed using the Matched Subject Ordinal Pairing (MSOP) method to determine the relative effectiveness of both training types. The results indicated that both exercises significantly improved athletes’ vertical jump performance. However, the Hexagon jump exercise showed greater effectiveness, with a winning proportion of 67% (4 out of 6 pairs) compared to 33% for the Squat jump. The superior results of the Hexagon jump group were attributed to its multidirectional movement pattern, which provides greater stimulation of coordination, balance, and neuromuscular reactivity. Therefore, it can be concluded that Hexagon jump training is more effective than Squat jump in enhancing lower limb power among youth soccer athletes.

This study aims to examine in depth the learning strategies implemented in the Bilingual-A class to develop early childhood language skills. The development of language skills in early childhood is an important aspect to consider, as language functions as the main medium for children to communicate, think, and express their feelings and ideas. However, language development problems often arise due to a lack of sufficient linguistic stimulation, both at home and in the learning environment. To address this issue, the study employs a descriptive qualitative approach through observation, in-depth interviews, and documentation involving teachers and children in the Bilingual-A class at RA Masjid Al-Akbar Surabaya. Through this approach, the researcher seeks to obtain a clear picture of how bilingual learning strategies are applied in daily classroom activities. The findings reveal that the applied learning strategies include communicative approaches, the use of enjoyable bilingual songs and games, and various visual media such as pictures, word cards, and teaching aids. The implementation of these strategies has proven effective in enhancing children’s vocabulary mastery, sentence construction ability, and confidence in communicating using two languages. These findings highlight the crucial role of teachers in designing engaging, interactive, and developmentally appropriate learning activities that holistically support children’s language growth.  

The development of digital technology has transformed marketing patterns, including in the culinary sector. The MSME Feedmee.ind utilizes digital marketing strategies and builds brand awareness to increase consumer purchasing decisions. This phenomenon is relevant to consumer behavior trends, particularly among the younger generation active on social media, making digital marketing a critical factor in business competition. This research aims to determine the influence of digital marketing and brand awareness on the purchasing decisions for the MSME Feedmee.ind at Royal Plaza Surabaya. This study employs a quantitative method with the population consisting of all Feedmee.ind consumers at Royal Plaza Surabaya, using an accidental sampling technique. The research sample comprises 92 respondents selected based on specific criteria. Data analysis was conducted using the Partial Least Squares – Structural Equation Modeling (PLS-SEM) technique with SmartPLS 4 software. The research findings indicate that digital marketing has a positive and significant influence on purchasing decisions. Similarly, brand awareness is also proven to have a positive and significant effect on purchasing decisions. These findings confirm that an interactive and consistent digital marketing strategy, supported by the strengthening of brand awareness, can effectively increase consumer interest and purchasing decisions.

This study aims to analyze in more depth the influence of work-life balance and job stress on employee performance at PT Cipta Wahana Persada Surabaya. The study employed a quantitative method with a survey approach, enabling researchers to obtain objective data based on real-world conditions. The study sample consisted of 38 employees selected through a saturation sampling technique, as the entire population was used as respondents. Data processing was conducted using SPSS version 29.0, with a series of stages including instrument testing, classical assumption testing, multiple linear regression analysis, and hypothesis testing to determine the influence of each variable. The results indicate that work-life balance and job stress simultaneously have a significant effect on employee performance. Partially, work-life balance has been shown to have a positive and significant impact on performance, while job stress also has a significant effect, albeit with a negative effect on productivity. These findings emphasize the importance of maintaining a balance between work and personal life and managing stress effectively to enable employees to perform optimally. Therefore, companies need to pay attention to these two factors to improve organizational performance and productivity.

This study focuses on the implementation of Good Corporate Governance values such as transparency, accountability, responsibility, independence, and fairness in managing payments and accounts receivable collection at PT. BLY, a galvanizing services company based in Surabaya. Using a qualitative case study approach, data were collected through in-depth interviews and observations over five months. The results indicate that these five principles have been consistently applied, supported by a well-organized recording system, complete documentation, and coordination across divisions. However, challenges such as document delays and potential human errors need to be addressed. Aging reports of receivables and payables reflect healthy financial management. This study recommends improving the information system and staff training to strengthen the implementation of Good Corporate Governance and support the sustainable continuity of PT. BLY’s business.  

This study examines job satisfaction among outsourcing employees in the Pelayanan Teknis Timur (PTT) Division of PDAM Surya Sembada Surabaya, with particular attention to the effects of workload and work environment. PDAM Surya Sembada Surabaya, a company specializing in the processing and distribution of clean water in Surabaya, frequently encounters job dissatisfaction attributed to excessive workload and suboptimal work conditions. A quantitative research design was implemented, utilizing structural equation modeling (SEM) with SmartPLS software for data analysis. Saturated sampling was applied, resulting in a sample of 57 respondents. The findings indicate that increased workload tends to reduce job satisfaction, while improvements in the work environment are associated with higher job satisfaction.

Nowadays, the success of a company in achieving its goals certainly cannot be separated from employee performance. From this, companies should be able to understand the importance of Human Resources (HR) in the company because they all work together to achieve the goals the company wants to achieve. On this basis, this research aims to determine the influence of training, laissez-faire leadership style, and work discipline on employee performance in the Accounting and Finance Division at the Surabaya Main Branch of the Indonesian Post Office. This research uses quantitative methods. The population is all employees at the Surabaya Main Branch Post Office in the Accounting and Finance division, totaling 55 people. Sampling is saturated sampling by making the entire population as respondents. The scale used in this research is an ordinal scale with the Likert method. Data collection techniques are interviews and questionnaires by distributing statements directly to respondents. Then for data analysis techniques using Partial Least Square (PLS) measurements of the outer model and inner model. The research results show that training, laissez-faire leadership style, and work discipline support increased employee performance. This shows that the better and more effective the training, laissez-faire leadership style, and work discipline implemented, the better the employee performance at the Surabaya Main Branch Post Office will be.

Speaking is a crucial component of communication. Speaking employed various tasks, expressing emotions or demands, requesting, and providing information. However, many students encounter challenges in speaking as a result of various difficulties. To address this, teachers can use interview techniques; interview techniques help to assess students' speaking skills to see and improve students' speaking skills. The objectives of this research are to explore the use of interview techniques to assess students' speaking skills and the difficulties and the benefits of using interview techniques. This research used basic interpretative qualitative research. This research was conducted on four English teachers in Surabaya, Indonesia, who had experienced an interview before. In collecting data, the researcher used interview and semi-interview guidelines. The findings indicate that the teachers used different types of interview techniques. The result showed interview technique can assess the students' speaking skills adapted to the teacher's need in English teaching. However, this technique also has difficulties and benefits that teacher and students may face. This study offers significant insights into teachers' perceptions and applications of interview techniques to assess students'' speaking skills. The findings of this research are anticipated to serve as a reference point and contribute pertinent data regarding teachers' experiences.

This study highlights the significant role of students at SMA Tahfidz Khairunnas Surabaya in promoting the values of moderate Islam within the urban metropolitan context of Surabaya. The findings demonstrate that the implementation of moderate Islamic education is reflected in four core principles: At-Tawazun (balance), At-Tawasuth (moderation), At-Tasamuh (tolerance), and Al-Adl (justice). These values are supported by the family, school, and community environment, which collectively contribute to shaping students’ understanding and practice of moderation. The results further suggest that fostering moderate Islamic values in metropolitan society requires both maturity and contextual comprehension, enabling communities to internalize and apply these principles effectively. The involvement of students in disseminating moderate values represents an essential step toward strengthening critical thinking, moral integrity, and social ethics in accordance with Islamic moderation. Therefore, the educational practices at SMA Tahfidz Khairunnas not only contribute to individual student development but also serve as a catalyst for cultivating a more harmonious, tolerant, and balanced urban society.

This study investigates the structural relationships among Product Quality (PQ), Brand Image (BI), Word of Mouth (WOM), and Repurchase Intention (RI) to empirically understand the sequential mechanisms driving consumer loyalty in a highly competitive market. Grounded conceptually in the Stimulus-Organism-Response (S-O-R) paradigm, the research posits that PQ acts as an external antecedent influencing RI through the mediating cognitive and behavioural constructs of BI and WOM. Data were collected from a sample of 187 Weber product consumers in Surabaya and analysed using Partial Least Squares Structural Equation Modelling (PLS-SEM). The empirical results confirm all hypothesized direct and indirect relationships. Specifically, PQ significantly and positively influences both BI (β=0.337, p<0.000) and WOM (β=0.351, p<0.000). Furthermore, both BI and WOM significantly predict RI, with WOM (β=0.498, p<0.000) demonstrating a markedly stronger effect compared to BI (β=0.414, p<0.000). The model successfully explains a moderate 57% of the variance in Repurchase Intention. These findings underscore the strategic imperative for management to prioritize superior product quality, which organically fosters a positive brand perception and stimulates potent word-of-mouth promotion identified as the most critical driver of repeated purchases. Future research is encouraged to integrate additional affective factors, such as customer satisfaction or perceived price fairness, to enhance the explanatory power of the consumer loyalty model.

The implementation of risk management is an important method that is carried out in order to identify risk factors that may arise during the implementation of the project. However, the implementation of risk management still faces some obstacles in its implementation. Therefore, this study aims to analyze the barriers to the implementation of risk management in construction projects in Surabaya. A total of 80 respondents filled out questionnaires from construction service providers including contractors and consultants. Respondents involved include professional experts such as Project Managers, Site engineers, Site managers, implementers, estimators, General Managers and Company Directors. Data processing using fuzzy AHP method as a data processing tool and decision making. The results of the study revealed that the main factors that can hinder the implementation of cost risk management are inaccurate cost estimates (Y4) with the highest weight of 0.433, lack of quality Control (Qc) supervision criteria (Y5) is ranked second with a weight of 0.288, poor coordination between stakeholders (owner,contractor and consultant) (Y1) is ranked third with a weight of 0.274, lack of risk management training (Y3) is ranked fourth with a weight of 0.005, and some, old age) (Y2), the work can not be done according to the work drawings (Y6), limited skilled human resources (Y7), materials not according to specifications (Y8), improper initial cost estimation (Y9), late progressive payment from the owner (Y10) ranked fifth jointly because it has an equivalent weight value of 0.These findings conclude that accurate cost estimation (Y4) is very important in construction projects because it becomes the main basis in budget planning, decision making, and risk management.

Deviant behavior in early childhood is an issue that needs serious attention, especially when children start to show the habit of using harsh language while interacting with peers. This phenomenon was found at TK Unggulan An Nur Surabaya, where some children tend to use impolite words during play and communication. The aim of this study is to identify the causal factors behind deviant behavior in early childhood, specifically rude speech, and to analyze the influence of family environment, school, peers, and media on such behavior. This research employed a qualitative approach with a case study design. Data were collected through direct observation, interviews with teachers and parents, and documentation from classroom activities. The findings revealed that rude speaking behavior is influenced by permissive parenting, peer group influence, exposure to inappropriate media, and immature emotional regulation. The conclusion is that deviant behavior such as harsh speaking does not arise in isolation but is the result of complex interactions between internal and external factors. Therefore, collaboration between teachers and parents in character education and monitoring of media exposure and peer environment is essential.

This study analyzes the inclusive education policy in Surabaya and its impact on the performance of elementary school educators. Using a descriptive qualitative approach, data were collected through observation, interviews, and questionnaires, then analyzed using source triangulation. The findings reveal that educators show strong commitment and apply various learning strategies to accommodate students with special needs. However, significant challenges persist, including limited facilities, a shortage of qualified personnel, and insufficient specialized training. In addition, factors such as high workload and social stigma hinder the effective implementation of inclusive education. Despite these obstacles, the policy demonstrates promising potential through systemic support, collaboration with parents, and the contribution of special assistant teachers. To achieve greater effectiveness, improvements in school infrastructure, continuous professional development, and more inclusive educational environments are essential. Strengthening stakeholder cooperation between schools, local governments, and communities will further enhance the sustainability and success of inclusive education in Surabaya.

Intellectual capital represents information that reflects the quality of human resources and the knowledge assets owned by a business unit. This study aims to examine the influence of intellectual capital on business performance in creative sector MSMEs, specifically in the fashion and beauty industries in Surabaya. Data were collected through questionnaires distributed to business owners to capture their understanding of the components of intellectual capital and its impact on business performance. The study employs a quantitative method with a correlational approach to analyze the relationships between variables. The results of significance tests indicate that intellectual capital overall has a notable impact on business performance. Specifically, Human Capital, Structural Capital, Relational Capital, Technological Capital, and Business Capital exert a positive influence, demonstrating that the quality of human resources, organizational structure, business relationships, technology utilization, and business assets are key factors in improving MSME performance. Conversely, Customer Capital shows a negative influence, highlighting the need for more effective strategies in managing and leveraging customer-related resources. These findings confirm that intellectual capital significantly affects the performance of creative sector MSMEs, suggesting that proper management and development of each component of intellectual capital is essential for enhancing competitiveness, sustaining growth, and ensuring the long-term success of small and medium enterprises.