Universitas Ahmad Dahlan Journal
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Optimizing Machine Learning-Based Network Intrusion Detection System with Oversampling, Feature Selection and Extraction
Get PDFNetwork security is a global challenge that requires intelligent and efficient solutions. Machine Learning (ML)-based Network Intrusion Detection Systems (NIDS) have been proven to enhance accuracy in detecting cyberattacks. However, the main challenges in implementing ML-based IDS are dataset imbalance and large dataset size. This research addresses these challenges by applying oversampling techniques to balance the dataset, feature selection using random forest to identify the most relevant features, and feature extraction using Principal Component Analysis (PCA) to further reduce the selected important features. Additionally, K-fold cross-validation is used to test the features to minimize bias and ensure the model does not suffer from overfitting, while Optuna is implemented to automatically optimize model parameters for maximum accuracy. Since IDS performance deteriorates with high-dimensional features, the combination of methods used is evaluated based on feature selection applied to the model using datasets wtih 45 features selected from UNSW-NB15, 78 features from CIC-IDS-2017, and 80 features from CIC-IDS-2018 using various ML algorithms. The results demonstrate that the combination technique with feature selection, along with maximum optimization for each model significantly improves performance on large and imbalanced datasets reaching 99% accuracy compared to conventional methods in network traffic analysis
The effectiveness numeracy learning strategies for early grade students in elementary school: a systematic review
Get PDFThe implementation of the Independent Curriculum in 2022 places improving numeracy skills as one of the priority programs for basic education in Indonesia. Early numeracy skills are an important foundation for children's cognitive development and long-term academic success. This study aims to evaluate and identify the most effective early numeracy learning strategies in supporting the strengthening of elementary school students' numeracy skills. The research method used is a systematic literature review with a qualitative-descriptive approach. Data sources were obtained through manual searches of 18 scientific journal articles and 4 conference proceedings published in the last five years. Of the total 22 publications analyzed, six learning strategies were found to be consistently reported as effective: (1) explicit learning through short-term interventions, (2) the use of concrete manipulatives, (3) the use of visual representations, (4) providing corrective feedback, (5) involving parents in the learning process, and (6) game-based learning. The last strategy is the most dominant, mentioned in eight different studies, with variations of digital and traditional games adapted to the local context. The results of this study provide a comprehensive illustration of relevant and implementable approaches in early numeracy learning. These findings contribute to providing an empirical basis for policy makers and educators to design contextual, adaptive, and evidence-based numeracy learning programs
Enhancing academic self-efficacy through cognitive behavioral counseling with integrated islamic values: a study on university students
Get PDFThis study investigates the effectiveness of Cognitive Behavioral Counseling (CBC) integrated with Al-Islam and Kemuhammadiyahan (AIK) values to enhance academic self-efficacy among university students. The study utilized a single-subject research (SSR) design with an A-B-A format involving five final-year students with low academic self-efficacy. Data were collected using the College Academic Self-Efficacy Scale (CASES). Data analysis combined visual graphical inspection and the Wilcoxon signed-rank test to assess the effectiveness of the intervention. Results showed a significant increase in academic self-efficacy post-intervention, with a Wilcoxon signed-rank test revealing a Z-score of -2.060 (p < 0.05). The integration of AIK values, particularly tauhid, provided a spiritual and moral foundation, demonstrating the intervention's effectiveness. These findings suggest that CBC techniques, when combined with religious values, can positively impact students' self-efficacy and academic performance. The study contributes a culturally relevant counseling model that integrates Islamic values, offering insights for academic counseling in Islamic institutions. Future research is encouraged to explore larger samples and diverse settings
Governance, business, legal, and technology: Strategies for addressing volatility and gharar in Sharia capital markets
Get PDFIntroduction to the Problem: This study explored the intertwined challenges of market volatility and gharar in Sharia capital markets, which jointly contribute to uncertainty and instability. Volatility and gharar are mutually reinforcing phenomena, while speculative behaviors such as margin trading and short selling intensify both factors, resulting in price distortions, obscured asset valuations, and reduced investor trust in Sharia-compliant instruments.
Purpose/Study Objectives: The objective of this research is to examine the characteristics and legal dimensions of both volatility and gharar in Islamic capital markets, assess their collective impact on Sharia-compliant issuers, and propose integrated governance, legal, business, and technological strategies to mitigate associated risks and enhance market resilience.
Design/Methodology/Approach: This study adopted a juridical-empirical-normative approach. The empirical aspect involved collecting and analyzing market data from the Indonesian Islamic capital market. At the same time, the normative analysis focused on evaluating regulatory instruments, including DSN-MUI Fatwa No. 80/2011 and OJK Regulation No. 15/POJK.04/2015, and within the context of Sharia principles and business law.
Findings: The study finds that both gharar and market volatility contribute to structural weaknesses in Islamic capital markets. In addition, speculative trading practices amplify uncertainty and instability, demanding a regulatory response that limits such activities. Strengthening corporate governance, enhancing disclosure practices, and applying business law mechanisms are essential to risk mitigation. The study recommends future research into cross-border regulatory comparisons and the role of financial technology in improving market transparency and Sharia compliance.
Paper Type: Research Articl
Increasing critical thinking skills by using electronic modules based on flipped classroom virus material for phase e students
Get PDFStudents critical thinking abilities can be improved through the use of innovative learning resources in order to achieve these competencies. This research aims to determine the feasibility, practicality and effectiveness of electronic modules based on flipped classroom circulation system material for class XI SMA. Researchers used the R&D development method with the ADDIE development model with stages: Analysis, design, development, implementation and evaluation. The subjects of this research are material experts and media experts. The instrument used in this research was a questionnaire. Data analysis uses a Likert scale. The results of this research show that the product is suitable for use based on the material expert's assessment of 93.58% (very feasible) and the media expert's assessment of 86.9% (very feasible). It is practically used based on the biology teacher's assessment of 95.38% (very practical) and small-scale test results of 91.02% (very practical), and is effective for improving students' critical thinking skills based on the N-gain score with a value of 0.6
The Effect of Learning Style on the Pretest Results of Animal Histology and Embryology Practicum for Biology Education Students UAD Batch 2023
Get PDFUnderstanding of lecture material requires not only theory, but also in-depth practicum. In an effort to improve learning outcomes, it is important to understand the various factors that can affect student learning outcomes, one of which is learning style. Learning style is a way or method used by individuals to receive, process, and remember information. This study aims to examine the effect of learning style on the results of the pretest of animal histology and embryology practicum in Biology Education students at Ahmad Dahlan University, class of 2023. This study is included in quantitative research, which identifies the effect of variable X on variable Y. The research instruments used include a learning style questionnaire with a total of 10 questions. The data obtained were analyzed using descriptive statistical analysis in the form of a normality test and a T test. The results of the normality test showed that the significance value obtained was more than 0.05, which means that the data was normally distributed. The results of the T test showed a significance value of 0.00 less than 0.05. This shows that there is a significant influence between learning style and student pretest results. Based on the results, it can be concluded that there is a significant influence between learning style and student pretest results in the Animal Histology and Embryology practicum
Gender Differences and Self-Esteem as Predictors of Perceived Sexual Harassment among Undergraduates in Nigeria
Get PDFSexual harassment has become a pervasive problem in many tertiary institutions worldwide which affects psychological, physical and academic well-being among undergraduates. This study investigated gender differences and self-esteem as predictors of perceived sexual harassment among undergraduates in Rivers State, Nigeria. Cross-sectional survey design was adopted while purposive sampling technique was used to select three tertiary institutions in the State. Data were collected from 250 participants using validated questionnaires and analyzed using multiple regressions analysis and independent samples t-test. Two hypotheses were tested and accepted at p <.05 level of significance. The result revealed that gender differences and self-esteem jointly predicted perceived sexual harassment among study participants R2 = .274, F(2,248) = 46.633, p <.05. In addition, gender differences (β = .349, p <.05) and self-esteem (β = -.348, p <.05) independently predicted perceived sexual harassment among study participants. Finally, the result confirmed gender differences and perceived sexual harassment [t(247) =17.981, p <.05] such that female undergraduates reported higher perceived sexual harassment (M =38.83, SD=1.29) than their male counterparts (M = 30.94, SD= 4.94). The novelty of this finding is that it is the first time sexual harassment is investigated among undergraduates in these three tertiary institutions in Rivers State. The study recommended that university authority should be proactive in designing and implementing policy that will reduce sexual harassment in their institutions.
Youtube Comment Sentiment Classification System With Naive Bayes TF-IDF Using Laravel IDX
No full textThe development of technology has enhanced social interactions through social media platforms like YouTube, making user comments a vital data source for sentiment analysis. One emerging issue is the lack of understanding regarding consumer perceptions of smartphone brands in Indonesia, which can be explored further through YouTube comments. This study aims to build a sentiment classification system for YouTube comments related to smartphone brands in Indonesia in 2024 using the Naïve Bayes Classifier algorithm with TF-IDF weighting and FastText features. Data was collected using the YouTube Data API, followed by preprocessing, labeling, and feature extraction stages. The model was optimized through GridSearchCV and evaluated with a Confusion Matrix, achieving an accuracy of up to 97%. The system was implemented as a Laravel-based web application, providing an interface for dataset management, model training, and sentiment visualization. This research also includes the integration of IDX Projects with Laravel, enabling more efficient data management and interactive presentation of sentiment analysis results. The findings demonstrate the effectiveness of this method in classifying positive and negative sentiments, which can help users understand consumer preferences for various smartphone brands
Integrating the Islamic concept of hikmah and positive psychology for holistic well-being: A literature review
Get PDFIn the face of increasingly complex challenges in modern life, there is a pressing need to integrate Islamic wisdom (hikmah) with the principles of positive psychology to achieve holistic well-being. Wisdom, as the capacity to comprehend and apply knowledge meaningfully, is deeply rooted in Islamic teachings. Concurrently, positive psychology emphasizes the cultivation of individual strengths and potential to promote psychological flourishing. This study aims to explore the intersections between hikmah as derived from the Qur’an and Hadith and the foundational tenets of positive psychology in promoting mental health, resilience, and life satisfaction as components of holistic well-being. A qualitative literature review was conducted using a meta-ethnographic synthesis approach. This method facilitates the integration of findings from multiple qualitative studies to generate new theoretical insights into a specific phenomenon. It is particularly suitable for research that investigates subjective experiences, perceptions, and behaviors in depth, with the potential to inform both theoretical development and practical applications. The literature search was conducted through major academic databases, including Google Scholar, SpringerLink, PubMed, and Cambridge University Press. Search terms included “wisdom,” “Islam,” “positive psychology,” and “well-being.” Inclusion criteria encompassed peer-reviewed articles published between 2020 and 2024 in either English or Indonesian. A total of eight relevant articles were selected for synthesis. The findings highlight a strong association between religiosity and social support with wisdom. Wisdom, in turn, exerts a positive influence on psychological well-being. Furthermore, religiosity and social support contribute indirectly to psychological well-being through the mediating role of wisdom. Positive psychology interventions were found to enhance wisdom, resilience, and cognitive flexibility. Additionally, spiritual and health-promoting behaviors were positively correlated with psychological well-being, with health-related behaviors serving as mediators. Wisdom was identified as a significant predictor of subjective well-being, particularly in later life stages. While spirituality supports mental health, its contribution to wisdom appears to be less pronounced compared to prosocial behavior and self-regulation. Interventions rooted in Islamic values have shown potential in improving psychological well-being, and multicomponent positive psychology programs have demonstrated efficacy in both enhancing well-being and alleviating depressive symptoms. Overall, wisdom and religiosity are positively associated with subjective well-being, with mastery and life purpose serving as mediating variables
Subjective Well-being in Long-Distance Marriage: The Role of Family Functioning, Financial Decision-Making, and Loneliness
Get PDFLong-distance marriage refers to a condition in which spouses live apart, potentially affecting their subjective well-being. This study aims to analyze the influence of family functioning, financial decision-making, and loneliness on subjective well-being in families experiencing long-distance marriage. A mixed-method approach was employed with 50 male and 55 female respondents. The findings indicate that family functioning scores were higher among female respondents compared to males, while no significant differences were found in other variables. The results of the SEM analysis show that family functioning on women had a significant positive effect, while loneliness on men had a significant negative effect on subjective well-being. Financial decision-making showed no significant impact. Families are encouraged to maintain shared spiritual routines and emotional connection, and engage in affective communication and social interaction to alleviate loneliness. Future research is expected to incorporate children‘s perspectives to better understand family functioning in long-distance marriage families