Al-Aqlu: Jurnal Matematika, Teknik dan Sains

PENERAPAN ATURAN CRAMER PADA KEUANGAN HARIAN MAHASISWA TEKNOLOGI INFORMASI ANGKATAN 24

2026-01-03T08:52:00+07:00

During college, students are given freedom to organize and carry out their activities because they are far from parental supervision and are not used to living without parents, students face difficulties in managing their daily finances. Therefore, Cramer's Rule of Linear Algebra is used to find out this problem. This study aims to implement Cramer's Rule on student financial problems in order to manage fund allocation in a structured manner. The data collection method in this study uses a quantitative approach on Google Form. The results obtained from the data using Cramer's Rule show that the daily finances of Information Technology students of Batch 24 in the food and beverage category on holidays, weekdays, and lecture days are unstable, so it is recommended to manage daily food and beverage finances well to be more stable

ANALISIS ISU SOSIAL MAHASISWA BERBASIS DATA MEDIA SOSIAL MENGGUNAKAN LATENT DIRICHLET ALLOCATION (LDA)

2026-01-03T08:51:56+07:00

This study aims to identify the most frequently discussed social issues among university student on social media platforms such as TikTok and Instagram. Data were collected via a questionnaire distributed to 50 students, with 49 valid responses analyzed. The Latent Dirichlet Allocation (LDA) method based on linear algebra was applied to classify text data into several main topics.

The result revealed three primary clusters of social issues: (1) gender equality and discrimination within the campus environment, (2) educational costs, mental health, and student welfare, and (3) campus politics and career opportunities. Campus politics emerged as the most dominant topic among others. These findings suggest that student actively utilize social media to express their views and respond to institutional policies that directly affect their academic lives. Furthermore, this research demonstrates the effectiveness of the LDA method in analyzing social data to reveal digital communication patterns among student

EFEKTIVITAS BELAJAR DI KAFE, PERPUSTAKAAN, DAN KAMAR KOS/RUMAH PADA MAHASISWA TI UBB ANGKATAN 2024

2026-01-03T08:51:49+07:00

An important factor in determining student academic success is learning effectiveness, currently many students still have difficulty in managing study time due to neglect of their surroundings. Therefore, this study aims to analyze the comparative effectiveness of three alternative study locations (cafes, libraries, and boarding rooms/houses) for UBB Information Technology students of the class of 2024 using a descriptive quantitative approach and Cramer's Rule modeling method to obtain the relative effectiveness weight (w). The results from 31 respondents showed a conflict between student habits and measured effectiveness: although boarding rooms/houses were used most frequently (90.3%), they only ranked second with a negative weight (wz = -4.7), suggesting that high comfort often sacrifices learning effectiveness. Conversely, libraries were rated most effective with the highest positive weight (wy = 13.9), as they were considered most conducive to concentration. Meanwhile, cafes ranked the lowest (wx = -10.8), confirming that external distractions are a major barrier, so this study suggests students prioritize environments that are measured as effective, such as libraries, for tasks that require deep focus.

SISTEM REKOMENDASI FILM MENGGUNAKAN METODE CONTENT BASED FILTERING DENGAN ALGORITMA TF-IDF

2026-01-03T08:51:54+07:00

The development of digital streaming platforms has led to information overload, making it difficult for users to choose a movie. This study aims to design and implement a movie recommendation system to address this issue. The method used is Content-Based Filtering (CBF), which focuses on textual content analysis. This system uses the Term Frequency-Inverse Document Frequency (TF-IDF) algorithm to weight words in movie synopses, and Cosine Similarity to calculate similarities between movies. The results of the study indicate that the system was successfully implemented. Functional tests showed that the system was able to provide highly relevant recommendations when the synopsis keywords were unique, such as in the 'Batman' test. However, the system also showed limitations when the keywords were ambiguous, such as in the 'Hulk' test which incorrectly matched the name "Bruce". For quantitative accuracy evaluation, the system was tested using the Precision@k metric and achieved an average precision value of 30.00% at P@5. The conclusion of this study is that the synopsis-based CBF method was successfully implemented, but its performance was shown to be highly dependent on the quality and uniqueness of the keywords in the synopsis data

ANALISIS PEMAHAMAN MAHASISWA TEKNOLOGI INFORMASI TERHADAP KONSEP VEKTOR PADA PEMBELAJARAN ALJABAR LINEAR

2026-01-03T08:51:45+07:00

Linear Algebra, particularly the concept of vectors, is an important foundation for Information Technology (IT) students in various applications in computing and computer graphics. This study aims to understand the extent to which Class A IT students at Bangka Belitung University (UBB) understand the concept of vectors conceptually and interpretively, as many students experience difficulties in connecting mathematical calculations with real-world applications. This study used a descriptive quantitative approach involving 21 respondents (saturated sampling) using a 5-point Likert scale questionnaire analyzed through average scores (means) and percentages. The results show that students' conceptual understanding is high (mean around 3.71). However, their ability to interpret computational results is still in the neutral category (mean around 3.19), indicating a gap between their ability to master formulas and their understanding of applications. The main finding shows that 80.9% of respondents really need a learning approach that focuses on visualization to overcome difficulties in understanding space. Thus, it is concluded that instructors need to change their teaching strategies by emphasizing functional interpretation and integrating visual aids to improve the application understanding of vectors.

PREDIKSI TINGKAT PRODUKSI PADI DI LOMBOK BARAT DENGAN METODE LEAST SQUARE

2026-01-03T08:51:58+07:00

Rice is one of the crops that plays a significant role in maintaining food security and supporting Indonesia’s economy. As the staple food for the majority of the population, rice strongly influences the country’s social and economic conditions. Due to its crucial importance, accurate predictions of rice production are required to support more effective planning. This study aims to forecast rice production in West Lombok Regency using the least square method. The data utilized include harvested area and rice production from 2011 to 2022. The resulting prediction model is a second-degree polynomial function that represents the relationship between harvested area and total rice production. Based on the Mean Absolute Percentage Error (MAPE) analysis, an error rate of 2.2391% was obtained, indicating that the model has a very high level of accuracy, as the error is below 10%. The findings of this study are expected to serve as a reference for more precise planning to improve rice production in West Lombok Regency

ANALISIS SISTEM ANTRIAN PADA BANK SUMUT KCP USU MENGGUNAKAN MODEL ANTRIAN MULTI CHANNEL SINGLE PHASE

2026-01-03T08:51:47+07:00

The queuing system in the Customer Service (CS) department of Bank Sumut KCP USU was studied using the Multi Channel Single Phase (M/M/s) model. The purpose of this analysis was to evaluate service effectiveness and identify the best queueing arrangement to reduce customer waiting time. Direct observation of customer arrivals and service times over two working weeks produced primary data. The system was in a stable state. The results of the Chi-Square distribution test showed that service time followed an exponential distribution and customer arrivals followed a Poisson distribution. With one customer service officer, the service level increased to 6–8 customers per hour, compared to the usual customer arrival rate of 3–5 people per hour. The system is still stable, according to the agent workload level of 0.44, but efficiency decreases with an average waiting time of 12.5 minutes during peak hours (09:00–11:00). According to the simulation, waiting time can be reduced to less than one minute and the overall service duration to around nine minutes by adding one CS, making a total of two agents. Therefore, it is recommended that Bank Sumut KCP USU employ two active customer service agents during peak hours to improve customer satisfaction and service efficiency

PEMODELAN ALJABAR LINIER UNTUK MENILAI KINERJA HIMPUNAN MAHASISWA TEKNOLOGI INFORMASI PERIODE 2025/2026

2026-01-03T08:51:41+07:00

This study aims to evaluate the performance of the Information Technology Student Association (HMTI) using a linear algebra modeling approach as a quantitative assessment method. Five main aspects were examined, including leadership, communication and coordination, program implementation, member involvement, and overall organizational effectiveness. The data were collected using a Likert-scale questionnaire administered to HMTI members and processed through vector representation and dot product operations to obtain a final performance score. The results indicate that HMTI’s performance is categorized as fair–good, with leadership and member involvement contributing the most to the overall score. Meanwhile, communication and coordination remain the lowest-rated aspect, significantly affecting the final evaluation results. These findings show that linear algebra modeling can provide an objective and measurable assessment, making it a reliable evaluation tool to support the continuous improvement of student organization governance.

ANALISIS KESTABILAN DAN SENSITIVITAS MODEL KECANDUAN FILM KARTUN

2026-01-03T08:51:43+07:00

This study aims to develop a model of cartoon addiction and analyze the stability of fixed points and parameter sensitivity. The novelty of this study lies in the mathematical model of cartoon addiction by dividing the population into four main classes, namely vulnerable individuals, occasional viewers, addicts, and those who have permanently stopped watching cartoons. The methods used include the formulation of a mathematical model based on a system of differential equations, the calculation of the basic reproduction number using the next generation matrix approach, the analysis of fixed point stability, and the evaluation of sensitivity indices to identify parameters that affect the basic reproduction number. The results of the analysis show that the fixed point without addiction is locally asymptotically stable when , while the endemic fixed point is locally asymptotically stable when . Sensitivity analysis shows that the parameters of the entry rate of susceptible individuals () and the effective contact rate () contribute positively to the increase in , while the parameters of the transition from susceptible to not interested in cartoons (), the recovery rate from addiction (), and natural mortality () contribute to the decrease in . In conclusion, this model provides a comprehensive overview of the dynamics of cartoon addiction and can be used to design more appropriate prevention and treatment strategies in society

ANALISIS INTEGRAL FRAKSIONAL FUNGSI HIPERBOLIK: KASUS TANGEN DAN COTANGEN

2026-01-03T08:51:39+07:00

This study examines the Riemann-Liouville fractional integral for hyperbolic tangent and cotangent functions with order using Maclaurin series division method and power function fractional integral theorem. Results show the fractional integral of hyperbolic tangent is expressed as a fractional power series with gamma function coefficients, while hyperbolic cotangent has a singular term . MATLAB visualization shows α variations produce different growth characteristics. Hyperbolic tangent is regular with odd function symmetry, while hyperbolic cotangent is singular around the origin. This research provides explicit formulas for fractional calculus applications