Garuda - Garba Rujukan Digital

Bahasa Inggris Erlinda Putri; Namira Yolanda; Rahmawati Munir
Jurnal Inotera Vol. 7 No. 2 (2022): July-December 2022
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol7.Iss2.2022.ID171

Kalimantan is an island surrounded by tropical rain forests and has hot and humid weather because it is crossed by the equator. The hot and humid weather affects the human working climate in the exchange of air in the room, for example in the laboratory. This study objective was to know the amount of air exchange per hour at the Samarinda Occupational Safety and Health Center. The tools used were the TESTO 425 anemometer, a digital meter, a thermohygrometer, a manometer, and a laptop. The chambers where air changes per hour measured were the main laboratory, weighing chamber, UV-VIS spectrophotometer chamber, and atomic absorption and chromatography spectrophotometer chamber. Based on the results of measurements and data analysis, it can be concluded that the ventilation system of 3 out of 4 laboratory chambers has met the recommendation.

Analisis Tendangan Pisang Pesepak Bola David Bandhaso; Rahmawati Munir; Adrianus Inu Natalisanto
Progressive Physics Journal Vol 3 No 1 (2022): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Banana kick is a type of soccer kick that uses the Magnus effect. The Magnus effect is a change in the direction of the ball's trajectory caused by the Magnus force. The force arises when a ball moving in air rotates on its axis. This research was conducted to analyze the ball entering the goal as a result of the Magnus force created by footballers. By means of Tracking Video Analysis and Modeling Tool software to several video tracks of football matches, it can be obtained the initial velocity, elevation angle, and angular velocity to determine the reach and heigh of the ball and the pertain Magnus force. The results of this study can be used in banana kick training.

Eksperimen Elastisitas Bahan yang Divariasi dengan Menerapkan Prinsip Cantilever Beam di Masa Pandemi Covid-19 Rahmawati Munir; Nadya Amalia; Dui Yanto Rahman; Desiana Olenka Margaretta; Erlinda Ratnasari Putri
Progressive Physics Journal Vol 3 No 1 (2022): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Saat ini pandemi Covid-19 telah menjadi faktor yang sangat berpengaruh dalam melakukan penelitian. Oleh sebab itu, umumnya penelitian yang dilakukan menyesuaikan kondisi sekarang dengan memanfaatkan alat dan bahan yang mudah diperoleh dan bisa dikerjakan dari rumah atau secara virtual. Pada penelitian ini dilakukan eksperimen elastisitas bahan berdasarkan prinsip Cantilever Beam yang bisa dilakukan di rumah. Preparasi sampel dilakukan dengan memotong kertas dengan variasi bentuk geometri dan densitasnya. Adapun geometri yang dipilih adalah persegi panjang dan trapesium. Persegi panjang divariasi densitasnya dengan variasi kertas polos, melapisi pilox sepanjang sampel dan juga pilox berselingan.Sementara yang berbentuk trapesium ditentukan dengan variasi polos dan dipilox sepanjang sampel. Eksperimen sederhana dilakukan dengan melakukan pemotretan pada sampel dengan sudut kelengkungan 00 , 450 dan 900 . Hasil pemotretan diolah dengan menggunakan aplikasi Video Tracker Analysis, Visual Basic Application dan fitting polynomial dengan Excel. Hasil yang diperoleh menunjukkan nilai modulus young setiap sampel tanpa harus melakukan pengukuran langsung dengan alat yang canggih serta bisa dilakukan di rumah selama pandemi Covid-19. Eksperimen ini berpotensi untuk dikembangkan lebih lanjut sehingga dapat menghasilkan metode baru dalam pengukuran elastisitas bahan.

Investigasi pola XRD dan ukuran kristal pada TiO2 terdoping vanadium menggunakan aplikasi VESTA Elfrida Dwi Saputri; Rahmawati Munir; Adrianus Inu Natalisanto
Progressive Physics Journal Vol 3 No 1 (2022): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Visualization of crystal structure and simulation of X-ray diffraction patterns of TiO2 (Titanium dioxide) was successfully performed by VESTA application. The purpose of this research is to obtain the relation of lattice parameter and composition to the diffraction pattern. The program on VESTA needs several input parameters that can be found on Crystallography Open Database (COD). The obtained output of the VESTA application are in the form of crystal structure and diffraction pattern graph. The data obtained by VESTA can be used to estimate the size of the crystal. The result showed that TiO2 has a tetragonal shape crystal structure. The addition of dopant such as Vanadium does not change the crystal structure and does not change the peak position of diffraction pattern graph.

Studi Adsorpsi Logam Berat Besi (Fe) dan Timbal (Pb) Air Sungai Mahakam oleh Limbah Cangkang Telur dan Abu Gosok Alris Sanca Pratama Putra; Rahmawati Munir; Adrianus Inu Natalisanto
Progressive Physics Journal Vol 3 No 2 (2022): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Waste could be found easily anywhere such as eggshells and rubbing-ash. Being a non-usable rubbish, These type of waste can be usefull in someways with a right treatment and deep research on compound material with in. The physical content from these waste utilized to be an adsorbent, it adsorbs a metal content e.g Mahakam river water sample. Main purpose of this research was based on benefical content from eggshells and rubbing-ash as their ability decreasing metal content. This study concluded experimentally using adsorbtion methods, a device such as Atomic Absobtion Spectrophotometer (AAS) was used to test the decreasing effect on logam content. The obtained data from testing process used to analyzed a metal concentration that disolved in water sample. This study results on decreasing metal concentration such as Fe and also Pb on Mahakam river water sample. Fe concentrat on these water sample shows decline rate from 1,5 mg/L to 0,11 mg/L given certain treatment adding eggshels powder. And also Pb content reduced from 1,69 mg/L to 0,24 mg/L indicate a little waste content from treated water sample. Inference from this study suggest addition of eggshells and rubbing-ash waste in form of powder had decreasing-effect on soluble metal content from Mahakam River water sample.

Analisis pertukaran udara per jam pada ventilasi laboratorium di kawasan hutan hujan tropis Namira Yolanda; Erlinda Ratnasari Putri; Rahmawati Munir
Progressive Physics Journal Vol 3 No 2 (2022): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Kalimantan is an island surrounded by tropical rain forests and has hot and humid weather because it is crossed by the equator. The hot and humid weather affects the human working climate in the exchange of air in the room, for example in the laboratory. This study objective was to know the amount of air exchange per hour at the Samarinda Occupational Safety and Health Center. The tools used were the TESTO 425 anemometer, a digital meter, a lutron-abh 4225, and a laptop. The chambers where air changes per hour measured were the main laboratory, weighing chamber, UV-VIS spectrophotometer chamber, and atomic absorption and chromatography spectrophotometer chamber. Based on the results of measurements and data analysis, it can be concluded that the ventilation system of 3 out of 4 laboratory chambers has met the recommendation. The calculation step was carried out by entering the measured parameters into the ACH equation. The last stage, the analysis was carried out to compare the ACH values based on the ASHRAE recommendations. Based on the results, the average value of ACH for the main laboratory room was 3,8 x/hour, weighing chamber was 15,61 x/hour, UV-VIS spectrophotometer was 12,7 x/hour, and atomic absorption and chromatography spectrophotometer chamber was 12,78 x/hour. The average number of air changes per hour (ACH) at the laboratory is 11,22 x/hour, where the amount of air changes per hour is in accordance with the ASHRAE (2011) recommendation for a good and healthy environment, the ASHRAE recommendations with the ACH of the Laboratory room ranging from 6 to 12 x/hour. It can be concluded that wind speed, cross-sectional area, and room volume affect the amount of air exchange per hour.

Analysis of ITO/a-Si:H(p)/a-Si:H(i)/c-Si(n)/Al HIT (Heterostructure with Intrinsic Thin Layer) solar cell performances. Igor Levi Satriani; Rahmawati Munir; Adrianus Inu Natalisanto; Dadan Hamdani
ELKHA Vol. 15 No.1 April 2023
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/elkha.v15i1.61351

Numerical simulation on HIT (Heterostructure with Intrinsic Thin Layer) solar cell using hetero-structure ITO/(p+)a-Si:H/(i)a-Si:H/(n)c-Si/Al solar cell has been done using AFORS-HET (Automate For Simulation of Heterostructure) software. The purpose of this study is to provide validation as well optimization model of solar cell enhanced performances. Data analysis shows a significant increase on solar power generation. An intrinsic thin layer given between the hetero-interface to reduce defect properties on solar cell structure. The optimization using an optimal value of acceptor-donor doping, dangling-bond defects ( ), thin conductive oxide work function ( ), and other input shows a reducing recombination-rates, as a validation Figure of Merits (FOMs) data reach a maximum efficiency value at 23,67% ( Â = 634,2 mV; Â = 51,2 mA/cm2; = 72,91%, this result achieved on peak data such Â = 5,2 eV, Na (doping) = 5.0 x 1019 cm-3, Â = 1.0 x 1018 cm-3, Â (interface defect) = 1.0 x 1010 cm-3. The results obtained from this simulation produce a number of optimum parameters that can be followed up experimentally to obtain better solar cell performances.

Karakteristik Adsorben Ampas Teh dalam Menyerap Ion Logam Timbal Menggunakan Model Isoterm Langmuir Akbar Perdana; Ahmad Zarkasi, Dadan Hamdani; Adrianus Inu Natalisanto Natalisanto, Rahmawati Munir
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 7, No 1 (2023)
Publisher : Universitas Padjadjaran

Timbal merupakan salah satu logam berat pencemar air yang sangat berbahaya. Salah satu metode yang dapat digunakan untuk menghilangkan kandungan logam berat tersebut adalah adsorpsi. Dalam proses adsorpsi, pemilihan adsorben sangat penting untuk memaksimalkan proses adsorpsi. Karenanya, penting untuk mengetahui karakteristik dan performa adsorben dalam menyerap logam berat. Model isoterm dapat digunakan untuk memprediksi karakteristik dan performa dari suatu adsorben. Penelitian ini dilakukan untuk meninjau karakteristik dan performa adsorben ampas teh dalam menyerap ion timbal menggunakan model isoterm. Hasil dari penelitian menunjukan bahwa mekanisme penyerapan ion timbal oleh ampas teh terjadi secara fisisorpsi, yaitu ikatan ion. Adapun sifat adsorpsi yang terjadi adalah menguntungkan. Ini menunjukan bahwa ketertarikan ion timbal terhadap ampas teh besar. Kapasitas maksimum ampas teh dalam menyerap ion timbal adalah 3,0353 mg/g. Ini menunjukan bahwa satu gram ampas teh dapat menyerap sebesar 3,0353 mg ion timbal.Kata Kunci: Adsorpsi, Ampas Teh, Timbal, Pencemaran Air, Isoterm

Pengaruh Penurunan Aktivitas Cobalt-57 Terhadap QC (Quality Control) Harian SPECT (Single Photon Emission Computed Tomography) di Instalasi Kedokteran Nuklir RSUD A. W Sjahranie Samarinda Siti Nur Khalisha; Retno Zurma; Erlinda Ratnasari Putri; Rahmawati Munir; Sahara Hamas Intifadhah
Progressive Physics Journal Vol 4 No 1 (2023): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ppj.v4i1.984

The utilization of radiation in the field of nuclear medicine uses several main tools, one of them is the gamma camera. In its use, the gamma camera must always be in prime condition in accordance with the regulation of the Badan Pengawas Tenaga Nuklir (BAPETEN) No. 17 of 2012. To ensure that the gamma camera is always in prime condition, it is necessary to carry out several QCs (Quality Control) within a certain period of time with reference to international standards and recommendations from manufacturers. QC results show the measured value still within the required range (acceptance criteria), so it can be said that the gamma camera is in prime condition and ready to be used. The Nuclear Medicine Installation of RSUD A. W Sjahranie Samarinda use Cobalt-57 flood source plates to measure extrinsic uniformity during daily QC. This study used data in the form of tables of extrinsic calibration measurements and verification measurements as well as graphs of Cobalt-57 activity against QC time with extrinsic calibration methods and verification measurements were shown in this study. The conclusion is the lower the activity, the longer the QC times. Besides, the QC times based on the extrinsic callibration and verification measurements are not much different.

Penerapan Hukum Newton dalam Menghitung Sudut Efektif pada Gerakan Bench Press Niken Ari Safitri; Adrianus Inu Natalisanto; Rahmawati Munir
Progressive Physics Journal Vol 4 No 1 (2023): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/ppj.v4i1.1016

Bench press is a form of powerlifting exercise that aims to increase the strength and endurance of the muscles of the upper body, that is, the muscles of the chest, arms, and shoulders. The characteristic of the bench press exercise is to lift or push the weight using both hands in a supine position. The purpose of this research is to determine the effective angle required for lifting weights with the least amount of thrust (biomechanics aspects). The research steps were carried out in four stages, namely: first, designing biomechanics mathematical equations; second, experiments on people doing bench press movements; third, processing biomechanics data; and fourth, analysis and discussion of biomechanics data. According to the study's findings, an effective angle was obtained by analyzing the thrust to lift the barbell, that is, the angle flanked by the upper and lower arms, which is approximately 89°-114° for those who use the smallest thrusts on the grip: 0.4 m, 0.5 m, and 0.6 m. It can be concluded that the wider the distance between the grips, the greater the thrust required.

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