SIPET Journal (Scientific Investigations of Physical Science and Engineering in the Tropics)

Uji Kelayakan Lead Apron Dengan Metode Pencitraan dan Dosimetri di Ruang Radiografi Umum pada salah satu Rumah Sakit di Kota Palangka Raya

sonia persa — Thu, 05 Jun 2025 00:00:00 +0000

Di Rumah Sakit memiliki pesawat sinar-X yang sering digunakan untuk tindakan kesehatan dan sinar-X memaparkan radiasi hambur yang sangat berbahaya untuk pekerja, masyarakat dan lingkungan. Maka dari itu pekerja radiasi harus menggunakan alat perlindung diri agar mengurangi paparan radiasi kedalam tubuh, salah satu alat perlindungan diri yang harus digunakan adalah lead apron. Untuk memastikan lead apron tersebut aman maka akan dilakukan pengujian, adapun lead apron yang di uji yaitu lead apron pemakaian 2 tahun dan 3 tahun untuk metode pencitraan melihat kelayakan lead apron dan metode dosimetri untuk pengukuran radiasi hambur. Hasil pengukuran lead apron pemakaian 2 tahun dengan metode pencitraan tidak ada keretakan dengan hasil 0. Sedangkan lead apron pemakaian 3 tahun terdapat keretakan pada setiap kuadran, kuadran 1 sebesar 58,117 (mm²), kuadran 2 sebesar 240,812 (mm²), kuadran 3 sebesar 562,243 (mm²) dan kuadran 4 sebesar 463,894 (mm²), untuk daerah rawan kerusakan tidak boleh melebihi 15 mm². Hasil pengukuran lead apron pemakaian 2 tahun dengan metode dosimetri kuadran ke-1 yaitu 0,00000 , pada kuadran ke-2 yaitu 0,00000 , pada kuadran ke-3 yaitu 0,00053 dan kuadran ke-4 yaitu 0,00107 , sedangkan lead apron pemakaian 3 tahun di kuadran ke-1 yaitu 2,21543 , pada kuadran ke-2 yaitu 2,16675 , pada kuadran ke-3 yaitu 2,28552 dan kuadran ke-4 yaitu 2,30906 .

Noice Level Meassurenment and Analysis in Faculty of Mathematics and Natural Science University Palangka Raya Class Room

muhammad naufaldi — Thu, 05 Jun 2025 00:00:00 +0000

This study was conducted in three classrooms at the Faculty of Mathematics and Natural Sciences, Palangka Raya University. The classrooms, namely A, B, and C, were chosen to gather data on the distribution of noise-induced intensity levels within and around the rooms over a period of five consecutive days for three weeks, with a two-hour interval in each room. Data were collected every three minutes during the lecture activities from 07:30 AM to 05:00 PM WIB. Data collection was performed four times: the first session from 07:30 AM to 09:30 AM, the second session from 10:00 AM to 12:00 PM, the third session from 01:00 PM to 03:00 PM, and the fourth session from 03:00 PM to 05:00 PM. The objective of this study was to determine the level of noise in the classrooms of the Faculty of Mathematics and Natural Sciences at Palangka Raya University and assess whether they exceed the established noise threshold. The data collected were in the form of intensity levels (dB) and were graphically represented to compare them with the reference value of 55 dB.

The results of the study indicated that the highest distribution of intensity levels across all classrooms was observed in Room B. This was due to the larger number of students in Room B compared to Rooms A and C. The highest intensity levels (noise) were consistently recorded for three consecutive weeks, accounting for 27%, 30%, and 28% respectively. The highest intensity levels were determined using the Discrepancy formula (3.1)

Pemanfaatan Panas Buang Kompor Biomassa sebagai Penghasil Energi Listrik menggunakan Generator Termoelektrik

Erin Novi yantho — Thu, 05 Jun 2025 00:00:00 +0000

Penelitian ini bertujuan untuk pemanfaatan panas buang dari kompor biomassa vortex sebagai sumber energi listrik menggunakan generator termoelektrik. Tujuan dari penelitian ini adalah untuk menciptakan alternatif sumber energi listrik yang ramah lingkungan dan berkelanjutan. Metode penelitiandengan menggunakan kompor vortex, serta 10 generator termoelektrik tipe TEG SP 1848–27145 sebagai penghasil listrik yang di susun secara seri. Variabel yang diukur dalam penelitian ini adalah perbedaan suhu di dalam dan di luar kompor biomassa, tegangan, dan arus listrik yang dihasilkan. Hasil penelitian menggunakan 10 generator termoelektrik menunjukkan bahwa penggunaan panas buang dari kompor biomass dapat menghasilkan listrik, dengan nilai tegangan dan arus listrik rata-rata sebesar 0,62 volt dan 1,12 ampere. Namun, semakin tinggi perbedaan suhu dan bertambahnya generator termoelektrik yang disusun, semakin besar tegangan listrik yang dihasilkan. Dalam kesimpulan, pemanfaatan panas buang dari kompor biomassa sebagai sumber energi listrik alternatif menggunakan generator termoelektrik memiliki potensi yang baik sebagai alternatif sumber energi yang ramah lingkungan. Namun, penelitian lebih lanjut perlu dilakukan untuk meningkatkan kinerja generator termoelektrik dan meningkatkan efisiensi penggunaan energi.

Analysis of the Influence of Pertalite Fuel on Motor Vehicle Exhaust Emissions

Wahyu nur aqni — Thu, 05 Jun 2025 00:00:00 +0000

The exhaust emissions of motor vehicles are the residual products of fuel combustion that occur within the engine of a motor vehicle. Exhaust emissions consist of COx compounds, HC, NOx, and other harmful pollutants. The exhaust emissions of motor vehicles can be influenced by the type of fuel used. In this study, an analysis was conducted on the influence of Pertalite fuel on the exhaust emissions produced by motor vehicles. The research results revealed that Pertalite fuel can affect the content of motor vehicle exhaust emissions. In the case of hydrocarbon compounds obtained in this study, the lowest value was 0 g/km and the highest was 0.187 g/km. The measured carbon monoxide compound had a minimum value of 0 g/km and a maximum value of 5.6 g/km. As for carbon dioxide compound, the lowest value was 1.6 g/km and the highest was 216.5 g/km. According to the Minister of Environment and Forestry Regulation No. P.20/MENLHK/SETJEN/KUM.1/3/2017 regarding the emission standards for motor vehicle exhaust, the research results showed that the HC compound was below the standard of 0.1 g/km. For the CO compound, there were data points that exceeded the standard, and all measured CO2 data surpassed the standard for motor vehicle exhaust emissions. Factors influencing the level of CO compound include the amount of pollutant emitted by the motor vehicle per kilometer traveled, and vehicles using gasoline fuels (premium, Pertalite, and Pertamax) emit a larger amount of CO exhaust compared to vehicles using diesel fuel.

Analysis of Canal Water Purification in the Sungai Jawi Using a Three-tier Filtration System Made of PVC Pipes

Amrah Farghaniyyah — Thu, 05 Jun 2025 00:00:00 +0000

The simplest method of water purification is achieved through a physical filtration process using natural materials such as zeolite, coral rock, palm fibers and other natural substances as filters. The filtration process allows for the separation of solid particles from water by passing water through a medium containing filters, resulting in clear filtrate. To obtain optimal water purification results, it is necessary to design a suitable and efficient water purification device so that the produced water remains clear and meets the quality requirements for clean water according to the 2010 Ministry of Health regulations. However, some communities are not familiar with the design of filtration devices and suitable filter components. Therefore, this experiment was conducted to design a water purification device using easily accessible and cost-effective filtering materials. Additionally, this experiment was carried out with various filtering materials to obtain data on the physical conditions of water in the Jawi River canal.