TIME in Physics

Analysis of Needs for Facilities and Infrastructure in the Physics Learning Media Laboratory at Muhammadiyah University Prof. Dr HAMKA

Adinda Permata Fahira, Imas Ratna Ermawati, Sugianto — Sun, 01 Sep 2024 00:00:00 +0000

Laboratories in lectures are very important in equipping students to study physics concepts, physics learning media laboratories can be a means for students to learn more about interesting and interactive physics learning tools and media. In this research, researchers used a quantitative survey research method with data collection techniques used in the form of non-tests and the tools used were questionnaires. Based on the results of the analysis using winsteps software, I8 (item number 8), I23 (item number 23) and I15 (item number 15) are not suitable because they do not meet the existing criteria, namely Outfit ZSTD (Z-Standardized Values), when viewed from Outfit MNSQ (Mean Square Values) and PT Measure-CORR (Point Measure Correlation) all items can be said to be valid. Based on the data obtained, it can be said that respondents answered according to the criteria. Therefore, the laboratory facilities and infrastructure of Prof. Dr. Hamka Muhammadiyah University meet the criteria. Cronbach's alpha with a score of 0.79 shows good results so that the item is said to be reliable. The person reliability value displays a score of 0.78 and the item reliability value displays a score of 0.88. The value of person reliability shows that the consistency of answers from students is "high", while the value of item reliability shows a value that is "high". So it can be said that the quality of the items used is very reliable.

A Force Field Simulation Approach to Analyze the Molecular Structure Stability of Cyanidin-3-Glucoside Using Avogadro: A Preliminary Study

Fri, 06 Dec 2024 00:00:00 +0000

Cyanidin-3-glucoside (C3G) is a flavonoid compound that is an antioxidant and natural colorant widely found in berries and vegetables such as red cabbage. This study aims to explore the structural stability of C3G using computer simulations based on force field theory through Avogadro software. In this study, the Universal Force Field (UFF), Merck Molecular Force Field (MMFF94), and General Amber Force Field (GAFF) methods were used to analyze the stability of C3G. The energy optimization results showed that the Ghemical method produced a more stable structure than other methods, although there was a discrepancy with GAFF. The GAFF method was more stable than UFF, but required more energy to achieve stability. Overall, the difference in force field methods affected the molecule's stability through optimization energy and structure parameterization variations, which affected the distance and angle of atomic bonds. These findings provide an efficient picture of the stable conformation of C3G, which can be applied in the food, health, and cosmetic industries.

Implementation of Adaptive Neural Fuzzy Inference Systems (Anfis) For Speech Recognition Applications In Smart Home Control

Roni Permana, Mada Sanjaya WS, Hasniah Aliah — Fri, 06 Dec 2024 00:00:00 +0000

Signal Processing is signal processing that is related to the presentation, transformation, and manipulation of signal content and information. Digital Signal Processing is signal processing that is related to the presentation, transformation, and manipulation of signal content and information in digital form. The speech control system is very efficient. Speech signals are signals that change over time at a relatively slow speed. If observed at short intervals (between 5 and 100 miles per second), the practical characteristics are constant, but if observed at longer intervals, the characteristics appear to change according to the sentences spoken. This study uses the signal pattern recognition method with the MFCC and ANFIS methods as learning. The performance results of the entire system obtained an accuracy value with 6 feature extractions in 2 respondents, namely 65% -72.5% and the smarthome control system worked well.