Jurnal Fisika Papua

Simple Python-Based Application for Transforming Apparent Resistivity Data from Schlumberger Configuration to Wenner Configuration Using the Linear Filter Method

2024-08-22T05:06:28+00:00

Research has been conducted regarding the design of a simple Python-based application to transform apparent resistivity values from the Schlumberger configuration into apparent resistivity values from the Wenner configuration using the linear filter method. The application developed was then validated using field data measurements from two different locations, namely Nendali Village in the East Sentani district and Buper Waena in the Heram Jayapura district. At each measurement point, two Vertical Electrical Sounding (VES) measurements were performed using Schlumberger and Wenner configurations. The apparent resistivity values from the Schlumberger configuration were transformed using the application created, and the results were compared with observational data from the Wenner configuration. Field data were taken for as many as six samples per logarithmic cycle, with the Schlumberger AB/2 configuration electrode spacing equal to the Wenner configuration electrode spacing. The maximum stretch lengths in Nendali and Buper villages were 26 m and 40 m, respectively. The research results show a match between the apparent resistivity values of the Wenner configuration obtained from field observations and the transformation results. This suitability was demonstrated qualitatively through the similarity of the apparent resistivity curve trend between the transformed and field observation data. Quantitatively, this suitability is shown by the slope value of the comparison curve of field observation data and transformed data, which in Nendali and Buper Villages is 0.75 and 0.98, respectively. The conclusion of this study is that a simple application that has been designed and created can be used to transform apparent resistivity values from the Schlumberger configuration to the Wenner configuration. A comparison between the transformed data and field observation data shows that suitability is highly dependent on the quality of the field data.

Analysis of the Effect of Sound Dampening on Ship Engines Based on Tofu Dregs Composite Material (Glycine Max (L) Merill)

2024-08-23T01:36:51+00:00

Noise in the engine room of a ship is a significant problem that can affect the health and comfort of crew members. This study aimed to evaluate the potential of tofu dregs as a sound insulation material in the form of a composite of carbon black and talak duco. The research method included making composite specimens with variations in composition, followed by testing the sound absorption coefficient using the impedance tube method. The results showed that the specimen with 30% tofu dregs, 45% carbon black, and 25% talak duco produced the highest sound absorption coefficient of 0.24. These findings show that tofu dregs have potential as an environmentally friendly and economical sound insulation material and can be used to reduce noise in ship engine rooms. This study contributes to the development of natural fiber-based insulation materials in the maritime industry.

Effect of Adding Packaged Cooking Oil on the Density of Red Fruit Oil (Pandanus Conoideus L.)

2024-08-23T01:37:45+00:00

Penelitian ini bertujuan untuk mengetahui pengaruh penambahan minyak goreng kemasan terhadap kepadatan minyak buah merah (Pandanus Conoideus L.). Penelitian ini dilakukan untuk mengetahui pengaruh penambahan minyak goreng kemasan terhadap sifat fisik minyak buah merah, khususnya kepadatannya. Penelitian ini dilakukan secara eksperimen di Laboratorium Fisika Lanjut FMIPA Universitas Cendewarasih. Sampel minyak buah merah diperoleh dengan cara pembelian langsung dari pengolah buah merah ternama di Kota Jayapura, yaitu dari rumah produksi Pak Made. Minyak goreng diperoleh dari pembelian minyak goreng yang tersedia di Kota Jayapura. Kebaruan penelitian ini terletak pada penelitiannya tentang pengaruh penambahan minyak goreng kemasan terhadap kepadatan minyak buah merah. Penelitian ini memberikan wawasan tentang sifat fisik minyak buah merah dan bagaimana sifat-sifat tersebut berubah ketika minyak goreng ditambahkan. Hal ini penting untuk mendeteksi praktik penipuan dalam bisnis minyak buah merah, di mana minyak goreng sering dicampur dengan minyak buah merah untuk menambah volume tetapi menurunkan kualitas. Penelitian menunjukkan bahwa massa jenis minyak buah merah hampir sama dengan massa jenis minyak goreng. Jika minyak goreng ditambahkan pada minyak buah merah dengan perbandingan maksimal 1:2, penambahan minyak goreng tidak akan terdeteksi dari hasil pengukuran massa jenis jika warna minyak buah merah tidak berubah drastis.

Model of Metal-Oxide-Semiconductor Contact Characteristics and Carrier Impurity Concentration in Depletion and Oxide Regions

2024-08-23T01:36:20+00:00

The aim of this research is to obtain characteristic modeling for forward and reverse voltages and the role of oxide as a barrier in the contact between metal semiconductors. When a forward or reverse voltage is applied, both types of semiconductor exhibit different characteristics. In this study, only these types are considered. The carrier concentration impurity within the semiconductor, width of the oxide material, depletion region, and active region are also reviewed. The method used was to examine the concept of a metal – oxide – semiconductor contact. In addition, the basic concept of energy bands is used to explain carrier flow events in semiconductors, which present band gaps, conduction band levels, and valence energy levels. The first research result is the characteristics of a metal – oxide – semiconductor-type connection when a negative and positive voltage is applied to a metal plate. The second is to find an equation for determining the concentration of substrate impurities. This equation shows the concentration of impurities in the semiconductor and the width of the oxide material, depletion region, and active region.

Study Literature: Application of The Principles of Thermodynamics, Thermal Expansion and Heat Transfer in Daily Life

2024-08-22T05:03:24+00:00

Thermodynamics belongs to the group of physics that contains material about calories and their transfer. The concepts of thermodynamics, thermal accumulation, and heat transfer are not only found in everyday life, but the principles of thermodynamics are also used in the use of industrial tools and technologies. The purpose of this research is to find out the tools, fields, and any activity that uses the principles of thermodynamics, heat transfer, and fertilization in its application. This study uses a method of literature review by analyzing 30 relevant articles and focusing on the application of the principles of thermodynamics, thermal absorption, and heat transfer in life. The results of the study found that thermodynamics, thermal accumulation, and heat transfer play an important role in a variety of activities such as the manufacture of debris, wheat, plywood, and brick, as well as in the use of electronic devices such as refrigerators, hair dryers, and hand dryers. In addition, the principle of thermodynamics is applied in industrial technologies such as mini generators, steam power plants, and the ceramic industry. The results of this study show that the laws of thermodynamics are widely applied in various aspects of life, both on a domestic and industrial scale.