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.

A Computational Study of Numerical Integration in Physics Applications Using Trapezoidal and Simpson's Methods

Muhamad Agung Suhendra, Sufiyah Assegaf, Iqbal Robiyana, Nurizati — Mon, 30 Sep 2024 00:00:00 +0000

This research conducts a comprehensive evaluation of the efficiency and accuracy of two widely-used numerical integration methods, the Trapezoidal Rule and Simpson's Rule, within the context of solving physics-related problems. The study focuses on four representative cases: the calculation of kinetic energy, the determination of electric field strength, the work done by an ideal gas, and the gravitational potential energy. The performance of these methods is analyzed through key metrics such as convergence behavior, error magnitude, and computational time. The findings reveal that Simpson's Rule consistently delivers higher accuracy compared to the Trapezoidal Rule, especially for functions exhibiting non-linear characteristics. This highlights Simpson's Rule as a preferred method for complex physical problems, while the Trapezoidal Rule remains effective for simpler cases requiring lower computational overhead.

Implementation of SCADA with Improvement of DKI Jakarta Flood Control Monitoring System

Mon, 30 Sep 2024 00:00:00 +0000

SCADA (Supervisory Control and Data Acquisition) is a system that can supervise, control and acquire data on a plant. This system uses a computer to display the status of sensors and actuators in a plant, display them in graphical form and store them in a database. Generally, this computer is connected to a Programmable Logic Control (PLC) controller through a certain communication protocol (serial communication). This Engineering Practice Report discusses the improvement of the Jakarta flood control monitoring system uses the SCADA system where currently the use of SCADA is only limited to the visual monitoring display of CCTV cameras with water level elevation notifications and risk level indicators arising from the data received. In the design of the SCADA system in pump houses or flood pump sub-polders in locations spread throughout DKI Jakarta that exist today, especially in the current projects implemented, namely JGC Marunda Sub Polder, Adyaksa Pump House and Tipala Pump House.

Evaluation Study of Power Requirements Planning in Electrical Installations in the Construction of the Pagedangan Tangerang Overpass Bridge

Januar Akbar, Harry Ramza, Agustini Rodiah Machdi, Agus Sofwan — Mon, 30 Sep 2024 00:00:00 +0000

The Pagedangan Tangerang Overpass Bridge is one of the transportation infrastructure in the Tangerang area. The installed electrical loads include lighting loads (lamps) and power loads (which of course require a fairly large electrical power supply. The electrical power installed on the Pagedangan Overpass Bridge is 20,300 W. The power supplied from PLN is 33,000 VA from PLN and the total power capacity of the transformer is 37,500 VA. The results of the drop voltage analysis calculation for the PJU lighting load are 5,530 VA. For the analysis results of the drop voltage of 2.00 V, the voltage drop percentage is 0.42% and the conductor power loss is 12.12 W, the power loss percentage is 0.27%.