Universitas Ahmad Dahlan Journal
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How Does Intolerance of Uncertainty Predict Work Readiness? Unveiling the Role of Self-efficacy
Full text linkAs students transition into the workforce, work readiness becomes essential—particularly for those entering high-uncertainty environments such as startups. While prior studies have established the negative impact of intolerance of uncertainty (IU) on various career-related outcomes, the underlying mechanisms by which IU affects work readiness (WR) remain insufficiently explored. Specifically, little is known about the mediating role of self-efficacy (SE) in this relationship, particularly within the context of internship experiences. Furthermore, existing research has rarely focused on student populations engaged in real-world transitions, such as internships in startup environments characterized by volatility and ambiguity. Addressing this gap, the present study investigates the effect of IU on WR with SE as a mediator. Data were collected through an online survey involving 208 student interns participating in the Certified Internship and Independent Study Program (MSIB), selected via purposive sampling. Validated Indonesian versions of the Intolerance of Uncertainty Scale-12 (IUS-12), General Self-Efficacy Scale (GSES), and Work Readiness Scale (WRS) were utilized. Data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM) via SmartPLS 4. The results indicate a significant indirect effect of IU on WR through SE, whereas the direct effect of IU on WR was not statistically significant. These findings underscore the critical role of self-efficacy in enhancing students’ work readiness and mitigating the negative impact of uncertainty
The role of job stress as a mediator on toxic leadership and turnover intention in Gen Z employees
Full text linkTurnover intention is a pressing concern for organizations, as employees are increasingly choosing to leave due to toxic leadership. Toxic leaders characterized by intimidation, manipulation, and a lack of support create detrimental work environments that elevate employee stress levels. This heightened stress, in turn, intensifies turnover intention, leading to higher retention rates. Toxic leadership not only undermines employee well-being but also significantly impairs organizational performance. This study aims to investigate the impact of toxic leadership on turnover intention, with job stress acting as a mediating variable. Focusing on Generation Z employees a growing segment of the workforce demographic this research examines how the unique challenges of this group interact with toxic leadership, offering crucial insights for organizations. The study employs a quantitative research approach utilizing survey methodology. Data were collected through questionnaires by involving 400 Generation Z employees in Jakarta. The sampling technique used was convenience sampling. The study utilized the Toxic Leadership Scale, Intention to Leave Scale, and Job Stress Scale as instruments. The results demonstrated that toxic leadership significantly drives turnover intention, with job stress playing a key mediating role. Toxic leadership was found to increase job stress, which, in turn, strengthened the intention of Generation Z employees to leave their jobs. These findings underscore the pressing need for organizations to address toxic leadership, thereby enhancing employee well-being and reducing turnover rates. The study offers valuable insights for organizations seeking to foster a healthier work environment and enhance employee retention
A Hybrid Classification Model Based on BERT for Multi-Class Sentiment Analysis on Twitter
Full text linkSocial media is one of the media to convey opinions and sentiments. Sentiment analysis is an important tool for researchers and business people to understand user emotions efficiently and accurately. Choosing the right classification model has a significant impact on sentiment classification performance. However, the diversity of model architectures and training techniques poses its own challenges. In addition, relying on a single classification model often causes noise, bias, data imbalance, and limitations in handling data variations effectively. This study proposes a hybrid classification model where BERT is the baseline. Furthermore, BERT will be hybridized using LSTM, and BERT is hybridized with CNN to improve sentiment analysis on Twitter social media data. The hybrid approach aims to reduce the limitations of a single model classifier by increasing model effectiveness, reducing bias, and optimizing the model on imbalanced data. The following are the steps in this study, data preprocessing, data balancing, tokenization, model training, and performance evaluation. Three models were trained: the baseline BERT model, the BERT-CNN hybrid, and the BERT-LSTM hybrid. Model performance was assessed using accuracy, precision, recall, and F1 score. Experimental results show that the baseline BERT model achieves an accuracy of 91.45%, while BERT-LSTM achieves 91.60%, and BERT-CNN achieves the highest accuracy of 91.80%. However, further analysis is needed to determine whether these improvements are statistically significant and whether the hybrid model offers additional benefits beyond accuracy, such as remembering underrepresented sentiment categories
Quantitative Assessment of Blacklist-Based Malicious Domain Filtering for ISP Security: Balancing Protection and Performance
Full text linkThe growing dependence on internet connectivity has heightened cybersecurity threats through malicious domains that facilitate malware, phishing, and botnet operations. These threats significantly impact individuals and organizations, particularly in Internet Service Provider (ISP) settings. Domain filtering on firewalls is a common defensive strategy, yet its effectiveness remains underestimated in large-scale ISP settings. Previous studies have not focused specifically on security systems commonly employed by ISPs, impeding practical adoption. The research contributions are: (1) developing a cost-effective malicious domain filtering approach specifically designed for ISP environments requiring minimal infrastructure investment, and (2) providing quantitative evidence of how blacklist-based filtering impacts both security effectiveness and network performance. The methodology employs alternating firewall states over four time periods to collect metrics including connection flow, bandwidth utilization, and packet rate. Results demonstrate that malicious domain filtering improves security while causing a 2.49% increase in total connection flow due to retry mechanisms. This process yields a 24.5% reduction in total bytes transferred, 10.5% decrease in packets sent, 22.58% reduction in bandwidth, and 8.81% decrease in packet rate. The study identified 1,919 malicious IP addresses blocked from 1,090 user attempts to access harmful domains. These findings confirm blacklist-based domain filtering strengthens security and enhances bandwidth efficiency by mitigating unwanted traffic. This approach is particularly relevant for ISPs, providing a cost-effective solution that balances cybersecurity with optimized network performance, allowing organizations to protect users while maintaining operational effectiveness
The influence of the TaRL approach on the critical thinking ability of elementary school students in mathematics subject
Full text linkThe results of the PISA study revealed that students have low critical thinking skills in Indonesia, especially in mathematics. This study aims to evaluate the effect of the Teaching at the Right Level (TaRL) strategy on the critical thinking skills of fourth-grade elementary school students in solving arithmetic problems in Yogyakarta. This study used a quantitative approach with a nonequivalent control group experimental design. The instruments used included essay tests, observation sheets, and documentation. Data were analyzed through descriptive statistics and t-tests to test the hypothesis. The results of the analysis showed that the TaRL strategy significantly improved students' critical thinking skills in four main aspects. The t-test produced a significance value of 0.000 (<0.05), indicating a significant difference between the experimental and control groups. The average posttest score of the experimental group reached 81.5, which is higher than that of the control group, which obtained an average of 76. This increase is illustrated in students' abilities to identify problems, analyze information, evaluate solutions, and logically convey arguments. These findings indicate that the TaRL strategy is effective in improving learning outcomes and contributes to strengthening students' critical thinking skills from an early age. Thus, the implementation of TaRL can be an alternative adaptive and transformative learning strategy to improve the quality of basic education in Indonesia
Formulation and Evaluation of Peel-Off Gel Mask and Face Mist from Noni Fruit Extract (Morinda citrifolia Linn.) Sub-Material Utilization of Cosmetic Plant-Based Biodiversity
Full text linkNoni plants (Morinda citrifolia L.) can be found in the territory of Indonesia. The utilization of noni plants is not widely known by the Indonesian people. This plant has active compounds in the form of vitamin C, vitamin E, flavonoids, saponins, steroids, and alkaloids. The purpose of this study was to formulate and evaluate the preparation of peel-off gel mask and face mist produced. The diverse local potential of Indonesian plants needs to be integrated as a learning resource into the biology learning process. The goal is for students to realize the potential of their respective regions. Local potential can be explored through various biology teaching materials, one of which is teaching materials on the utilization of biodiversity. This type of research is experimental research. This study was conducted with the aim of making and evaluating a product, namely the preparation of peel-off gel mask and face mist from noni fruit extract. This research was conducted at the Biology Laboratory of Ali Maksum Krapyak High School, Yogyakarta and at Ahmad Dahlan University Pharmacy LAMDA (Analysis Laboratory). Noni fruit samples were taken from the Sleman area, Yogyakarta. The stages of this research were formulating noni fruit extract, preparation and physical evaluation of various organoleptic tests, pH tests, dry time tests, and spreadability and stickiness tests. The organoleptic test observation results of the peel-off gel mask are clear yellowish white, typical noni odor with jasmine perfume essence, thick and homogeneous shape. The pH value is 6. The dry time test is 20 minutes. The spreadability test is 5-7 cm and the stickiness test is 08.56 seconds. Organoleptical observation of face mist is clear white, typical odor of noni with essence jasmine, liquid form. The pH value is 5.5. The conclusion from these results is that the manufacture and evaluation of peel-off gel mask preparations and face mist from noni fruit extract (Morinda citrifolia Linn.) is safe to use and can be used as a learning resource for cosmetic plant-based biodiversity utilization sub-materials
The Influence of Learning Motivation and Student Perceptions of Teacher Teaching Methods on Biology Learning Outcomes Students on Class X Special Sports (KKO) SMA Negeri 1 Sewon
Full text linkKKO is a special class for talented students in the field of sports. Biology scores of KKO students at SMA Negeri 1 Sewon are usually low due to fatigue and many sports activities outside of school. This study aims to determine: (1) The effect of learning motivation on the biology learning outcomes of students in class X KKO SMA Negeri 1 Sewon. (2) The effect of student perceptions of teacher teaching methods on the learning outcomes of students in class X KKO SMA Negeri 1 Sewon. This study uses a quantitative approach with a population of X class students. Data were collected through documentation and questionnaires, and analyzed by simple regression. The results showed: (1) Learning motivation has a positive influence on biology learning outcomes with rx|y 0.745 and r2 xy|0.555. (2) Students' perceptions of teachers' teaching methods als2o have a positive effect on biology learning outcomes with rx|y 0,908 and r y 0,824.x
Project Base Learning Analysis In Simple Machine Material In Limited
Full text linkBased on the Instruction of the Governor of the D.I. Yogyakarta No. 28/INSTR/2021 to overcome the COVID pandemic, learning is carried out in the form of limited face-to-face meetings. Amount students who are allowed to attend is 30%, and the others studied outside, that used google classroom. Currently, class VIII students have not interacted directly friends or educators for 15 months since entering school. This is indicated by the level of activity in answering questions of 13.6%. This research is a qualitative research that analyzes the project base learning method in the topic of simple planes in limited face-to-face meetings. PjBL steps 1) Formation of groups in project activities. 2) Presenting real-world problems, applying a simple machine in cardboard machine, 3) Making a project work schedule requires the educator role. Educator supervision determines the success rate of project creation. 4) Problem findings are discussed and consulted educators directly and used whatts app groups. 5) The product exhibition is held in the physics laboratory. 6) The maturity level of students determines the dependence of mentoring. The 21st century capabilities that can be achieved in the application of PjBL through communication and collaboration as well as metacognitive abilities. Metacognition in the form of the ability to set learning goals, monitor the execution of knowledge, clarity and accuracy. Weaknesses in communicating due to limited face-to-face meeting conditions, substituted with whats app groups for discussio
PROFIL BERPIKIR SISWA SMP DALAM MENYELESAIKAN MASALAH BANGUN RUANG KERUCUT BERDASARKAN LEVEL VAN HIELE
Full text linkJenis penelitian ini adalah penelitian deskriptif dengan pendekatan kualitatif. Tujuan penelitian ini yaitu untuk mendeskripsikan profil berpikir siswa SMP dalam menyelesaikan masalah bangun ruang kerucut berdasarkan level van Hiele. Subjek penelitian ini adalah siswa kelas VII G SMPN 4 Jember. Metode pengumpulan data yang digunakan yaitu metode tes dan wawancara, dengan instrumen penelitian sebagai berikut: tes VHGT (Van Hiele Geometry Test), tes penyelesaian masalah dan pedoman wawancara. Tes VHGT (Van Hiele Geometry Test) dilakukan untuk mengklasifikasikan siswa ke dalam tingkat berpikir geometri van Hiele dan diperoleh 3 siswa pravisualisasi, 11 siswa level visualisasi, 14 siswa level analisis, dan 2 siswa level deduksi informal. Kemudian diambil satu siswa dari tiap-tiap level van Hiele. Hasil penelitian menunjukkan bahwa proses berpikir siswa level visualisasi cenderung konseptual pada tahap memahami masalah, menyusun rencana, melaksanakan rencana, memeriksa kembali. Sementara itu, proses berpikir siswa level analisis dan deduksi informal adalah proses berpikir semi-konseptual pada tahap memahami masalah, menyusun rencana, melaksanakan rencana, dan memeriksa kembali. Manfaat penelitian ini bagi peneliti adalah dapat memperoleh pengetahuan serta pengalaman mengenai profil berpikir siswa dalam menyelesaikan masalah bangun ruang kerucut berdasarkan level van Hiele
EKSPLORASI ETNOMATEMATIKA PADA RUMAH ADAT HONAI PAPUA
Full text linkPenelitian ini bertujuan untuk mengeksplorasi unsur-unsur etnomatematika yang terdapat dalam Rumah Adat Honai Papua berdasarkan enam aktivitas dasar matematika menurut Bishop, yaitu counting, locating, measuring, designing, playing, dan explaining. Penelitian ini menggunakan pendekatan deskriptif kualitatif dengan jenis eksploratif, dan dilaksanakan di Lembah Baliem, Kabupaten Jayawijaya, Provinsi Papua Pegunungan. Teknik pengumpulan data meliputi observasi nonpartisipatif, wawancara semi terstruktur, dan dokumentasi visual, yang dianalisis secara interaktif melalui proses reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa unsur-unsur matematika yang ditemukan mencakup praktik menghitung bahan bangunan (counting), penentuan orientasi rumah (locating), pengukuran ruang dan bentuk (measuring), desain geometris atap dan lantai (designing), kegiatan sosial dalam rumah (playing), serta penjelasan simbolik bentuk rumah yang berkaitan dengan nilai sosial dan budaya lokal (explaining). Temuan ini memperkuat bahwa etnomatematika tidak hanya menjembatani antara konsep abstrak dan pengalaman nyata, tetapi juga menjadi sarana pelestarian budaya lokal dalam konteks pendidikan matematika