Universitas Ahmad Dahlan: UAD Scientific Journal
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Hybrid Stacking of Multilayer Perceptron, Convolutional Neural Network, and Light Gradient Boosting Machine for Short-Term Load Forecasting
Full text linkShort-term load forecasting (STLF) is essential for scheduling, dispatch, and demand-side management. Real-world load series exhibit rapid local fluctuations and calendar or exogenous influences that challenge single-model approaches. This study proposes a hybrid stacking framework combining a Multilayer Perceptron (MLP), a 1-D Convolutional Neural Network (CNN), and a Light Gradient Boosting Machine (LightGBM), integrated through a ridge-regression meta-learner. The CNN extracts local temporal patterns from sliding windows of the load series, and the MLP processes tabular features such as lags, rolling statistics, and calendar/holiday indicators. At the same time, LightGBM captures nonlinear interactions in the same feature space. Base learners are trained using a rolling TimeSeriesSplit to avoid temporal leakage, and their out-of-fold predictions are used as inputs for the meta-learner. Early stopping regularizes the neural models. Experimental backtests on Queensland electricity demand data (89,136 half-hourly samples) demonstrate that the stacked model achieves markedly lower forecasting errors, with MAPE ≈ 0.81%, corresponding to a 24% reduction compared to CNN (MAPE ≈ 1.07%) and a 32% reduction compared to MLP (MAPE ≈ 1.19%). Regarding runtime, LightGBM is the fastest (25s) but least accurate, while the stacked model requires longer computation (2488s) yet delivers the most reliable forecasts. Overall, the proposed framework balances accuracy and robustness, and it is modular, reproducible, and extensible to additional exogenous inputs or base learners
Potret fenomena mistik dalam teks sastra sakral kidung “Sudamala”
Full text linkPenelitian ini mengkaji fenomena mistis dalam teks sastra klasik Kidung Sudamala, sebuah karya yang berasal dari tradisi Jawa-Bali dan sarat akan nilai spiritual serta simbolisme religius. Kisah utama dalam teks ini menggambarkan proses ruwatan Dewi Uma yang dikutuk menjadi Batari Durga, sebagai bentuk konsekuensi atas pelanggaran moral. Pendekatan kualitatif deskriptif digunakan dalam menganalisis struktur naratif, simbolisme, dan nilai religius dalam teks tersebut. Grand teori yang mendasari penelitian ini adalah mistisisme, yakni suatu paham spiritual yang menekankan pengalaman langsung dengan realitas ilahi atau kekuatan adikodrati sebagai pusat dari seluruh keberadaan. Mistisisme dalam penelitian ini digunakan sebagai landasan utama untuk memahami representasi simbolik dan spiritual dalam Kidung Sudamala, terutama yang berkaitan dengan konsep ruwatan, karma, reinkarnasi, dan moksa. Langkah yang dilakukan untuk memperoleh data dan hasil penelitian adalah sebagai berikut: (1) mengadobsi dan mencermai teks sastra sakral Kidung ”Sudamala”, (2) menandai bagian mistik dari kidung tersebut, (3) mengumpulkan data penelitian, (4) melakukan analisis sanding-banding data dengan teroi dan pendapat ahli, dan (5) menyimpulkan hasil penelitian. Hasil kajian menunjukkan bahwa unsur mistik dalam Kidung Sudamala dimanifestasikan melalui transformasi wujud, praktik ruwatan, mitos setra sebagai tempat ilmu pengiwa, serta representasi konsep karma dan moksa. Setra Gandamayu sebagai latar utama menjadi simbol ruang penyucian spiritual, sementara tokoh seperti Dewi Durga dan Rangda mencerminkan relasi antara kekuatan adikodrati dan keseimbangan kosmis. Dengan demikian, teks ini tidak hanya menjadi sarana ekspresi budaya, tetapi juga menjadi refleksi sistem kepercayaan dan spiritualitas masyarakat tradisional di Nusantara
Strategic Management of the Police Academy (Sekolah Polisi Negara) Polda Bengkulu in Enhancing Student Quality
Full text linkBackground. This study aims to explore and analyze the implementation of strategy management at the Police Academy (Police College) of Bengkulu Regional Police (SPN POLDA Bengkulu) in its efforts to improve student quality and its impact on graduate outcomes. The objective of this study is not only important for the development of education at the Bengkulu Regional Police Academy, but also contributes to a broader discourse on strategic management practices in other educational institutions. Therefore, these findings are expected to serve as a reference in decision-making and policy formulation aimed at improving the quality of education in law enforcement institutions.
Methods. The methodology used in this study is descriptive qualitative with a case study approach. Data were obtained through observational interviews and document studies from 12 key informants over a period of three months (May-July 2023). Thematic analysis was conducted through coding and categorization, with data validity ensured through triangulation, member checking, and peer debriefing, as well as based on research ethics. This study aims to analyze and describe the implementation of strategic management in SPN administration, particularly in efforts to improve the competence and readiness of students as prospective police officers.Results. Research findings indicate that strategic management at the Bengkulu Regional Police Headquarters is implemented through focused vision and mission planning, strategic environmental analysis, and active leadership involvement in the decision-making process. These strategies have had a positive impact on the quality of graduates, as evidenced by improvements in professionalism, discipline, and operational readiness in task forces. Policy and strategy evaluations show that program implementation is relatively effective, although challenges remain in areas such as supervision and sustainability.
Conclusion. This study recommends strengthening the monitoring system, continuing character development programs, and optimizing the role of instructors to further improve student quality
Looking at the effect of TaRL-integrated CBL on students' scientific literacy skills: What we can learn?
Full text linkIn the 21st century, scientific literacy is essential for students to face the complexity of global problems that require scientific understanding in decision-making. PISA data shows Indonesia's low scientific literacy. In 2018, it ranked 74th out of 79 countries with a score of 396 (40% of students only reached level 1), and in 2022, it dropped to 69th out of 81 countries with a score of 383 (34% of students at the elementary level). Less than 1% of Indonesian students reached levels 5-6 in both periods. Efforts to optimize scientific literacy were carried out by implementing a case-based learning (CBL) model integrated with the teaching at the right level (TaRL) approach. A quasi-experimental study was conducted at SMAN 1 Kota Jambi with the topic of the immune system using a non-randomized pretest-posttest control group design. The sample was selected using purposive sampling in grade XI, consisting of an experimental class (CBL-TaRL, n=36) and a control class (CBL, n=36). The results showed that the average score of the experimental class increased from 54.17 to 85.28, while the control class increased from 50.69 to 68.61. The one-way ANCOVA test showed a significant difference [F(1,69)=27.560, p<0.001, ηp²=0.28] with a large effect size. Students taught using CBL-TaRL had a higher increase in scientific literacy, especially in the aspects of analyzing scientific phenomena (36%) and designing scientific investigations (34%)
Association Between Obesity and the Incidence of Hypertension Among Adolescents in Ponorogo
Full text linkObesity occurs due to excess energy stored in body fat tissue, resulting from an imbalance between energy intake and expenditure. In adolescence, obesity is a multifactorial health problem influenced by genetic, behavioral, environmental, and social factors, and is a known risk factor for hypertension. The pathogenesis of hypertension in obese individuals involves abnormal adipose tissue activity in producing hormones and adipokines, although the mechanisms are not yet fully understood. Several studies have linked obesity to hypertension, but mostly in adult populations, where the indicators for obesity differ from those for adolescents and children. In younger populations, overweight or obesity assessment should be based on BMI-for-age charts adjusted for sex, yet studies in adolescents often still use adult criteria. This study aimed to determine the association between obesity and hypertension among adolescents in Ponorogo. An observational analytic study with a cross-sectional design was conducted using data from the 2024 PASHMINA (Pelayanan Kesehatan Remaja Milik NA) health screening program organized by Regional Board of Nasyiatul Aisyiyah of Ponorogo among senior high school students. A total of 179 respondents participated, with 65.9% female and 65.4% having normal nutritional status. The overall prevalence of hypertension was 6.1%, while obesity prevalence was 12.8%. Hypertension was more common in obese adolescents (26.1%) compared to non-obese adolescents (3.2%), with obesity increasing the risk of hypertension by 10.66 times (p < 0.001). These findings highlight the need for appropriate obesity assessment methods in adolescents and the importance of nutrition education, promotion of physical activity, early detection, and regular health monitoring to prevent hypertension from an early age
Analysis of select Newspapers’ reportage of the 2022 Abuja-Kaduna Terrorist Train attack
Full text linkInsecurity remains a pressing national concern in Nigeria, yet the media is often criticized for not fully performing its watchdog role in sensitizing the public and holding institutions accountable. This study examined newspapers’ reportage of the 2022 Abuja-Kaduna terrorist train attack between March and November 2022. The Nigerian Tribune and The Punch were selected, yielding 492 editions from which a sample of 217 was drawn using the Krejcie and Morgan sample size calculator. Purposive and simple random sampling techniques were employed, and data were generated through content analysis. Straight news stories, features, illustrations, and special reports served as the main units of analysis, while Critical Theory of Society and Priming Theory provided theoretical grounding. Findings revealed that coverage of the Abuja-Kaduna attack was initially frequent but gradually declined over time. Furthermore, the two newspapers accorded low prominence to the incident, with most reports placed on inside pages rather than front pages. The dominant thematic framing emphasized rescue efforts, while other critical dimensions such as accountability and root causes of insecurity received limited attention. The study concludes that the prominence and frequency of reportage were disproportionately low compared to the gravity of the terrorist attack. This research contributes to media and security scholarship by highlighting gaps in Nigerian newspapers’ coverage of terrorism, particularly in terms of agenda-setting and priming functions. It underscores the need for continuous, balanced, and prominent reportage of security issues to promote public awareness, accountability, and resilience in addressing insecurity in Nigeria
The effect of interpersonal communication intensity and openness on self-esteem among communication students at Universitas Muhammadiyah Yogyakarta
Full text linkSelf-esteem is a crucial component of students’ psychological well-being and is strongly shaped by the quality of interpersonal communication. This study investigates the influence of communication intensity and openness on the self-esteem of Communication Science students at Universitas Muhammadiyah Yogyakarta. A quantitative survey was conducted with 81 randomly selected respondents using a validated questionnaire. Data were analyzed through Pearson correlation and simple linear regression. The results indicate that openness has a moderate positive correlation with self-esteem (r = 0.402, p < 0.05), while intensity shows a lower yet significant correlation (r = 0.363, p < 0.05). Together, the two variables explain 16.2% of the variance in self-esteem, although only openness demonstrates a near-significant individual effect. These findings suggest that the quality of communication is more influential than its frequency in shaping self-esteem. The study contributes to communication science by extending Social Penetration Theory within the Indonesian context and emphasizing openness as a key factor in student development. Practically, the findings encourage universities to integrate open-communication training and peer-mentoring programs to support students’ psychological well-being. The main limitation of this study is the relatively small sample and focus on a single program, which restricts generalizability. Future research should involve larger and more diverse populations and include additional variables such as emotional intelligence and social support to provide a more comprehensive understanding
Broadcasting in the Era of Digital Technologies: A Perceptual Assessment of Imo State Based Journalists
Full text linkThis study examines how digital technologies influence broadcasting practices among journalists in Imo State, Nigeria. Using a census-based survey (N=200), findings show that digital technologies significantly enhance news gathering, production speed, and dissemination efficiency (Mean=3.5). However, inadequate ICT training and poor infrastructure remain constraints. The study concludes that digital convergence has reshaped broadcast workflows, requiring sustained capacity building and policy support. The key contribution of this study was that it gave insights on how journalists perceive Digital Technologies in modern day broadcasting as well as how it is has influence the practice of broadcasting in the era of digital technologies especially in Imo State
The Role of Persuasive Communication in TikTok Content by @taniaanglt to Encourage Generation Z Productivity
Full text linkThis study aims to analyze the persuasive communication strategies used in TikTok content created by @taniaanglt and to understand how Generation Z audiences process such messages through the central and peripheral routes of the Elaboration Likelihood Model (ELM). Employing a descriptive qualitative design, this research integrates content observation, comment documentation, and in-depth interviews with five informants aged 18–24 years. Data were collected from five selected TikTok videos, public audience comments, and semi-structured interviews, then analyzed using thematic analysis. Findings reveal that visual aesthetics such as pastel color tones, soft lighting, calming music, and slow-paced editing serve as emotional triggers that activate the peripheral route. Once initial emotional engagement is established, reflective narrative statements encourage deeper cognitive elaboration, leading audiences into the central route. The creator’s authenticity further strengthens message credibility and enhances persuasive effectiveness. The study also demonstrates that the interplay between emotional and cognitive pathways fosters productive behavioral changes among Generation Z audiences, including organizing study spaces, adopting realistic daily routines, and embracing balanced productivity practices. Overall, this research confirms that persuasion on short-video platforms works through a synergistic combination of affective and rational processing. It contributes theoretically to expanding the application of ELM in digital media contexts and offers prospects for future studies on persuasive patterns within Generation Z’s online culture
Phonology of the Qur'an: Al-Nabr and Its Practice in the Qur'an
Full text linkQur'anic phonology is the study of the sound and pronunciation of the sacred text of the Qur'an. One important aspect of this phonology is al-nabr, which refers to the emphasis of the voice in the pronunciation of the verses of the Qur'an. This emphasis not only serves to clarify meaning, but also has aesthetic and spiritual implications in the recitation of the Qur'an. The practice of al-nabr in the Qur'an involves other sciences such as ashwāt, tajweed and makhraj, which provide guidance on how each letter and syllable should be pronounced correctly. This research is a library research using one of the research work steps of ashwāt science. It explores the ways in which al-nabr is applied in the rules of Arabic and its application in the Qur'an. By understanding the phonology of the Qur'an, one can appreciate the linguistic beauty and depth of meaning contained in the Qur'an. Through descriptive analysis, this article contributes to the treasures of ulumul Qur'an, especially the field of ashwāt science and the urgency of al-nabr in the study of the Qur'an