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All Journal JOURNAL ONLINE OF PHYSICS JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Jurnal Fisika dan Terapannya
Sitti Nurrahmi
Universitas Islam Negeri Alauddin Makassar
Education Physics Other

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MODEL NON LINEAR KEJADIAN CURAH HUJAN EKSTRIM DI KOTA PALU MENGGUNAKAN PROGRAM JAVA Nurrahmi, Sitti; Farhamsa, Dedy; Iqbal, Iqbal
JFT : Jurnal Fisika dan Terapannya Vol 7 No 1 (2020): Juni
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v7i1.14138

Abstract

Weather and climate are the main factors for influence on various activities of life. The increasing of human activity has made the change in components biophisical environment, which are major contributors about climate change. The most important of the process of climate change is the emergence of the extreme, that one example is, extreme rainfall, that the rainfall have more than 50 mm intensity / day. To know characteristic of climate change occurring, needed a model who represented data rainfall in various meteorology station. Based on it, author make a modeling the extreme rainfall in Palu city using Java programming. The results of the extreme rainfall predictions 10 years using software models and Java programming, in Palu city with using fourier series function order 5 predicted the extreme rainfall will likely increase every year with the highest event are  2 times / years. The prediction was featuring the precisely  value with the real data. So, we can conclude that the extreme rainfall model tends to be accurate and can be used to predict the extreme rainfall in Palu city and in other cities.
PENGARUH PENAMBAHAN PATI DAN PLASTICIZER GLISEROL TERHADAP SIFAT MEKANIK PLASTIK BIODEGRADABLE Sitti Nurrahmi; Sity Nuraisyah; Hernawati Hernawati
JFT : Jurnal Fisika dan Terapannya Vol 7 No 2 (2020): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v7i2.18267

Abstract

Biodegradable plastics are plastics that will decompose  in nature with the help of microorganisms. The use various of starch as the main material of plastic manufacturing has great potential because in Indonesia there are different starch crops. To obtain bioplastics, starch is added to the plasticizer glycerol, in order to obtain a more flexible plastic and elastic. This study reviews  the  use  of starch to obtain good mechanical properties of biodegradable plastics. Addition various of starch affecting the mechanical properties of biodegradable plastics. But, addition of plasticizer  glycerol on many kinds of starch lower the value of tensile strength and raising the value of elongation. But, when added chitosan and glycerol, increasing the value of tensile strength and lower the value of elongation.
Uji Kesesuaian Kinerja dan Analisis Reproduksibilitas Akurasi Tegangan Tabung Pesawat Sinar-X di Balai Pengamanan Alat Fasilitas Kesehatan Makassar Nur Isnaeni; Suci Khusnul Amelia; M. Ichzan; Jumardin, Jumardin; Sitti Nurrahmi; Jasdar Agus; Dwi Febri Isradianti; Khaerul Bariah
JFT : Jurnal Fisika dan Terapannya Vol 11 No 1 (2024): JUNI
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v11i1.47855

Abstract

The X-ray beam collimation test, voltage accuracy test, reproducibility test, and fourth is the X-ray beam output test (Half Value Layer) on the Mobile X-ray aircraft. This testing aims to determine the standards that have been set. Tests that have been carried out on the illumination and the difference between the collimation field of the beam and the X-ray beam show that the results obtained have passed the test on an X-ray aircraft. Both tests are in accordance with established standards. Reproducibility testing is carried out by measuring the radiation output (mGy) at the same settings repeatedly. The data shows a corrected mean of 0.075 mGy with a standard deviation of 0.0034, indicating that the X-ray aircraft has good reproducibility in producing consistent radiation output. The mobile X-ray unit tested had sufficient accuracy and reproducibility that complied with established standards and demonstrated the reliability of the device in clinical practice. X-ray beam output testing was carried out and a corrected HVL value was obtained which was greater than the test pass value. The results obtained are in accordance with established standards.
POTENSI KITOSAN DARI CANGKANG INTERNAL CUMI SEBAGAI ADSORBEN LOGAM BERAT TIMBAL (Pb) DI PERAIRAN SUNGAI TALLO SULAWESI SELATAN Fadilla, A. Ainur; Nurrahmi, Sitti; Rani, Sefrilita Risqi Adikaning
JOURNAL ONLINE OF PHYSICS Vol. 10 No. 2 (2025): JOP (Journal Online of Physics) Vol 10 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v10i2.38100

Abstract

Heavy metal pollution in aquatic environments is one of the serious problems that threaten the health of ecosystems and humans. Various methods have been developed to overcome this pollution, one of which is using natural materials such as chitosan. This study aims to explore the potential of chitosan produced from squid (Loligo sp.) internal shells as heavy metal adsorbents in filtration systems. Chitosan is a biopolymer known to have a high ability to bind metal ions through its amino and hydroxyl groups. In this study, chitosan was synthesized through several processes, namely Deproteination, mineralization and deacetylation of chitin extracted from squid internal shells. The resulting chitosan was characterized using infrared spectroscopy (FTIR) to identify groups formed from the chitin deacetylation process. The results showed that chitosan based on squid internal shells has an adsorption capacity that meets the standard water content of 2%, ash content of 1% and Deacetyl Degree (DD) of 82.8%. Based on the characterization of functional groups using FTIR, the hydroxyl group -OH and the amine group (-NH2) play a significant role in the heavy metal adsorption process. Because these groups are able to form complex bonds with heavy metal ions. Application in the absorption of Pb metal in water samples of the Tallo River in South Sulawesi, obtained an adsorption effectiveness of 96.4%. Overall, chitosan from squid internal shells has the potential as a heavy metal adsorbent in water filtration applications. This study opens up new opportunities in the development of natural materials for sustainable water treatment technology.
Rancang Bangun Sistem Penyiraman Otomatis pada Green House Tanaman Anggrek Menggunakan Sensor DHT22 Sitti Nurrahmi; Nurfalah Miseldi; Syarif Hidayatullah Syamsu
JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Vol 11 No 1 (2023)
Publisher : Pendidikan Fisika UIN Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jpf.v11i1.33419

Abstract

Salah satu perkembangan teknologi elektronika ditandai dengan penggunaan mikrokontroller di berbagai bidang kehidupan manusia, termasuk dalam budidaya tanaman anggrek. Dalam perawatan tanaman anggrek, selain pemupukan, juga dibutuhkan penyiraman yang efektif untuk membantu proses pertumbuhannya, dimana hal ini merupakan suatu pekerjaan yang monoton dan dilakukan dengan cara manual pada jam-jam tertentu. Penelitian ini telah berhasil merancang sebuah sistem penyiraman tanaman anggrek berbasis Arduino Uno, yang dapat menjaga suhu dan kelembaban di sekitar tanaman anggrek tetap pada kondisi yang dibutuhkan untuk tumbuh kembangnya. Adapun alat akan melakukan penyiraman secara otomatis pada pukul 09:00 wita dan akan kembali melakukan penyiraman bila kelembaban udara yang dideteksi oleh sensor DHT22 kurang dari 70%. Selain itu, jika nilai suhu udara yang dideteksi sensor DHT22 lebih tinggi dari 30°C maka motor fan akan aktif untuk medinginkan suhu disekitar tanaman anggrek.
Co-Authors Dedy Farhamsa Dwi Febri Isradianti Fadilla, A. Ainur Hernawati Hernawati Iqbal Iqbal Jasdar Agus jumardin jumardin Khaerul Bariah M. Ichzan Nur Isnaeni Nurfalah Miseldi Rani, Sefrilita Risqi Adikaning Sity Nuraisyah Suci Khusnul Amelia Syarif Hidayatullah Syamsu