Universitas Ahmad Dahlan: UAD Scientific Journal
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A cross-cultural study of ostensible invitations in English and Indonesian: Linguistic and pragmatic perspectives
Full text linkThis study investigates ostensible invitations in English and Indonesian from a cross-cultural perspective, focusing on their linguistic forms and pragmatic functions. Ostensible invitations—offers made without a genuine expectation of acceptance—are examined through naturally occurring conversations, role-play data, and discourse analysis. The study draws on politeness theory, speech act theory, and high- vs. low-context cultural frameworks to explore how indirectness, formulaic expressions, and contextual cues convey non-literal intent. In English, ostensible invitations often employ vague or non-committal phrasing to minimize imposition and protect negative face, such as “We should get together sometime.” In Indonesian, they frequently appear in culturally prescribed forms like Main ke rumah kapan-kapan (“Come to my house sometime”), functioning to maintain social harmony (kerukunan) and express positive politeness. Findings reveal that while both languages use ostensible invitations to manage interpersonal relationships, their underlying motivations and interpretive cues differ due to contrasting cultural values, such as individualism in English-speaking contexts and collectivism in Indonesian society. The research highlights implications for intercultural communication, language teaching, and translation, aiming to reduce misunderstandings caused by differing pragmatic norms
Collaborative digital marketing and supply chain management for micro, small and medium enterprises
Full text linkThis study explores specific supply chain challenges faced by Batik Ayu Arimbi, a small-scale business in the batik industry, particularly how the manual calculations in its make-to-stock system impact its financial accuracy and operational efficiency. The company has been experiencing financial losses due to these inaccuracies. To address these issues, this research proposes improvements in supply chain management by implementing Business Process Model Notation (BPMN) to streamline process visualization and coordination among the artisans, showrooms, and production houses. The use of digital marketing platforms, particularly Instagram, is also suggested to optimize marketing efforts and achieve sales targets. This study contributes to the literature by emphasizing novel BPMN implementation aspects and demonstrating the effectiveness of digital marketing for MSMEs in the textile sector. The qualitative data was collected through semi-structured interviews, which provided insights into current practices and areas for improvement. The findings show that increased cooperation between supply chain actors reduces inventory errors by 20% and increases the accuracy of financial tracking by 15%, thereby reducing operational risks. Furthermore, the digital marketing strategies increased customer engagement rates by 25%, directly contributing to sales growth. The findings further suggest that the proposed solutions not only resolve the identified problems but also provide a scalable model for enhancing resilience in Batik Ayu Arimbi’s supply chain operations as one of MSMEs. In conclusion, boosting sustainability and performance in MSMEs requires improved supply chain collaboration and the strategic application of digital tools
Reimagining literacy strategies in early childhood education of Indonesia: A systematic literature review
Full text linkEarly childhood literacy is a fundamental skill in developing language skills, critical thinking, communication, and understanding context. However, PISA results indicate that early childhood literacy in Indonesia remains low, while the literature synthesis on how literacy is implemented in contextual and sustainable early childhood education (PAUD) settings is very limited. Therefore, this study aims to analyze research trends in the application of literacy in the PAUD environment through a Systematic Literature Review (SLR) study using a modified SLR protocol. The main database used by Google Scholar involves 21 articles published between 2017 and 2025, and analyzed thematically. The findings show that implemented literacy in early childhood education of Indonesia includes reading, writing, and storytelling skills, it implies that the concept of literacy need to be expanded. Another finding is that parents play a role in building a culture of literacy. This study recommends for a broad mastery of literacy skills to create more appropriate literacy learning in Indonesian context. It also encourages teachers to develop children's literacy skill through more various attractive activities
Strategy for Improving SMAW Welding Practice Learning: Case Study at Vocational High School
Full text linkWelding is one of the most essential competencies in the metal fabrication industry. Therefore, effective SMAW (Shielded Metal Arc Welding) practice learning strategies are critical to ensuring quality learning outcomes. In vocational high schools (VHS), however, challenges persist, such as low student performance, joint defects, and a lack of industry-relevant learning models. These issues underscore the need for a more in-depth examination of practical learning strategies and efforts to enhance student competencies, an area that remains underexplored. This study aims to explore strategies for improving SMAW practice learning through a single-case study conducted in a vocational high school (VHS). Data were collected via in-depth interviews with six welding teachers and four certified student welders, supported by document analysis. The findings indicate that three main strategies are essential: (1) understanding and application of welding parameters by students, (2) intensive mentoring from teachers, and (3) independent evaluation by students. These strategies have the potential to enhance both understanding and performance in SMAW practical learning in vocational settings
Improving Vocational High School Students’ Speaking Ability through the One Minute Sharing (OMS) Technique
Full text linkSpeaking is often perceived as one of the most challenging skills in learning English, including among Grade X Broadcasting students at a vocational high school in Yogyakarta. To address this issue, a Classroom Action Research (CAR) was conducted to investigate the effectiveness of the One Minute Sharing (OMS) technique in enhancing students’ speaking ability. The OMS technique requires students to speak spontaneously for one minute on selected topics, and in this study, it was implemented over two research cycles. Initial observations and a pre-test revealed low speaking proficiency, with an average score of 63 and only 15% of students meeting the Minimum Mastery Criterion (SKM). Furthermore, many students lacked confidence, and only one-third demonstrated strong motivation. In Cycle I, the average speaking score increased to 70, with 63% of students achieving SKM, and motivation levels rising to 60%, although some hesitation persisted. In Cycle II, improvements were made by incorporating more engaging activities, providing direct modelling and feedback, and offering small rewards as appreciation. These refinements resulted in an average score of 80, with 86% of students meeting SKM and an equal percentage reporting greater motivation and confidence in speaking English. The findings indicate that providing regular, individual speaking opportunities through OMS can substantially improve speaking ability, enhance motivation and self-confidence, and foster better classroom engagement. Therefore, the OMS technique can be considered an effective and practical instructional strategy for promoting autonomous speaking practice, particularly in vocational high school contexts
Implementation of hazard analysis critical control point (HACCP) on pan–seared butter fish with herb cream sauce in PT AF
Full text linkHazard Analysis Critical Control Point (HACCP) is a quality assurance, food safety, and risk management system with a preventive approach to ensure food safety for consumers. Food served during in–flight travel is provided by in–flight catering. Airline food has very high standards regarding food quality and safety. The purpose of this study is to analyze the application of HACCP to aviation food products by identifying potential hazards and applying Critical Control Points (CCP). The method used in this study is Critical Control Point (CCP) observations, carried out at the receiving (CCP 1), chiller and freezer (Storage) (CCP 2), cooking (CCP 3), blast chilling (CCP 4), and serving (CCP 5) stages. The company has created a HACCP plan as a guide for all processes that occur within the company. All are organized based on HACCP principles for the entire process.
Keywords: CCP, Food Safety, HACCP, Inflight Catering, ISO 22000
Systematic review: Comparison of halal regulations in Asia
Full text linkThe harmonization of halal standards in Asia is crucial for boosting regional trade, ensuring consumer confidence, and meeting religious requirements in the growing halal industry. This systematic review employed a qualitative comparative analysis of 9 key journal articles and 8 major halal regulations in Asia, including Malaysia's MS 1500-2009, OIC/SMIIC 1:2019, Saudi Arabia's SASO 2172, and UAE.S 2055-1:2015, as well as recent changes in Indonesia's laws (Law No. 33/2014, Law No. 6/2023, PP No. 39/2021, and PP No. 42/2024). This analysis reveals significant differences in halal definitions, certification protocols, and the role of regulatory authorities, which hinder harmonization. Specifically, it was found that countries such as Indonesia, Malaysia, Saudi Arabia, and Brunei implement mandatory halal policies, while others like Japan, Thailand, and India adopt voluntary approaches. The review highlights that while countries share common goals of food safety and sharia compliance, cultural and technological variations, alongside certification costs for MSMEs, remain significant barriers. Mutual recognition agreements, cross-border compliance, and the adoption of technologies like blockchain are emphasized as essential for fostering transparency and an integrated halal market. This study provides fresh insights into the benefits of harmonizing halal standards for producers, consumers, and regulators, ultimately aiming to reduce trade barriers, increase trust, and support regional economic growth.
Keywords: Asia halal certification, Asia trade, Blockchain technology, Halal standard, Regional harmonization
A Comprehensive Review of Optimization Techniques in Industrial Applications: Trends, Classifications, and Future Directions
Full text linkIn recent years, optimization techniques have played a central role in enhancing operational efficiency and decision-making across diverse industrial sectors, including manufacturing, logistics, and transportation, energy, healthcare, and agriculture. These sectors face complex, large-scale, and often nonlinear challenges that demand both precision and adaptability. The research contribution of this review is to provide a structured classification of optimization methods—namely exact algorithms, heuristics, metaheuristics, and AI-integrated hybrid models—and to critically evaluate their practical applications, limitations, and emerging trends across industries. This study adopts a review approach to identify and compare those techniques in solving various optimization problems. Through a detailed analysis of over 30 recent publications for last four years, the review highlights how these techniques are being applied in real-world industrial environments, including cold chain logistics, smart energy systems, precision agriculture, and healthcare scheduling. The results indicate a growing reliance on hybrid and AI-enhanced models due to their superior scalability, adaptability, and potential alignment with Industry 4.0 and Sustainable Development Goals (SDGs). However, challenges remain in areas such as computational efficiency, model interpretability, and real-time data integration. In conclusion, this study provides valuable insights for both researchers and practitioners seeking to apply optimization techniques more effectively in industrial systems, while also identifying critical research gaps for future exploration by addressing the growing complexity and sustainability demands of modern industry
Improving Performance and Safety in Mechanical Ventilation: A Robust Control Approach for Airway Pressure and Patient Flow
Full text linkThe mechanical ventilation system demand precise and highly responsive control for airway pressure (Paw) and the patient flow (Qpat) as system nonlinearities and time varying disturbances for example the changes in lung mechanics or patient effort it compromise patient safety and treatment efficacy. This study addresses to critical challenge of the robust regulation by comparing two advanced nonlinear control strategies which ar: the Nonlinear PID (NPID) controller and the Active Disturbance Rejection Control with Nonlinear PD structure (ADRC-NPD) controller. The research utilizes a state space model of the respiratory system that developed and simulated in the MATLAB/Simulink for rigorously test controller performance under abrupt changes in the desired pressure setpoint (Pset). The model incorporate clinically relevant lung mechanics that including fixed values for the airway resistance (Rl) and lung compliance (Cl) to represent specific patient scenario. Performance is assessed using key metrics are rise time, overshoot/undershoot, settling time and tracking error. The ADRC-NPD controller consistently demonstrated superior performance that attributed to it Extended State Observer (ESO) for real time estimation and compensation of total system disturbances. Specifically the ADRC-NPD achieved a significantly faster rise time reach to (0.174s vs. 0.38s) and minimal undershoot (-0.3025% vs. -16.573%) compared to the NPID controller that indicating exceptional tracking fidelity and stability crucial for patient well being. The findings strongly that suggest that the ADRC-NPD provides a more robust and clinically viable control solution. Future work will focus on the real-time clinical simulation and hardware in the-loop implementation to validate these results under dynamic and patient specific conditions
A Review of EEG Applications in Neuromarketing: Methods, Insights, and Future Directions
Full text linkEEG is increasingly applied in neuromarketing as it provides direct insights into consumer cognition and emotion beyond traditional self-report measures. However, challenges such as small samples, low ecological validity, and methodological limitations hinder its broader real-world application. The research contribution is a comprehensive synthesis of 40 empirical studies that examine EEG applications in neuromarketing, highlighting methodological approaches, analytical techniques, key insights, and persistent gaps that define the current state of the field. This review applied a structured comparative method by extracting and analyzing details from published EEG-based neuromarketing studies, including sample characteristics, device specifications, stimuli types, analytical techniques, and outcomes. The data were organized into a review table and further examined for patterns, strengths, limitations, and emerging opportunities. The results reveal that EEG can reliably classify consumer preferences when paired with deep learning models, while EEG indices such as neural synchrony and frontal alpha asymmetry predict advertising effectiveness and purchase intention. Emotional and attentional processes were consistently reflected in ERP components, and multimodal integration with physiological and behavioral data improved predictive validity. Nonetheless, most studies relied on small, homogeneous samples and static laboratory stimuli, limiting generalizability. In conclusion, EEG holds strong potential for advancing neuromarketing research and practice, yet future work must address scalability, cross-cultural validation, and ecological realism to fully harness its promise