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INDONESIA
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Published by Universitas Negeri Jakarta
ISSN : 23021829     EISSN : 24769398     DOI : https://doi.org/10.21009/03
Core Subject : Science, Education, Engineering,
Electrical & Electronics Engineering Energy Physics Other
Focus and Scope: Physics education Physics Instrumentation and Computation Material Physics Medical Physics and Biophysics Physics of Earth and Space Physics Theory, Particle, and Nuclear Environmental Physics and Renewable Energy
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 976 Documents
 94   95   96   97   98 
EVALUATING RENAL TIME-INTEGRATED ACTIVITY COEFFICIENT IN [177Lu]Lu-DOTA-TATE THERAPY: SIMULTANEOUS VS. SEPARATE KIDNEY MODELING USING NON-LINEAR MIXED-EFFECTS MODELING Indra Budiansah; Assyifa Rahman Hakim; Fira Dwi Ananda; Supriyanto Ardjo Pawiro; Deni Hardiansyah
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA01

Abstract

This study aimed to compare renal time-integrated activity coefficients (TIACs) in [177Lu]Lu-DOTA- TATE therapy using non-linear mixed-effects modeling (NLMEM), by evaluating the effect of the fitting setting method of left and right kidney biokinetic data to TIAC calculation. Renal biokinetic data of [177Lu]Lu-DOTA-TATE were collected from ten patients with neuroendocrine tumors from literature (PMID:33443063). SPECT/CT imaging was performed between days 1 and 7 after-injection. The bi-exponential function parameters were fitted to biokinetic data using NLMEM performed using NONMEM software, with two fitting approaches: simultaneous fitting of both kidneys and separate fitting of the left and right kidneys. TIACs from the simultaneous fitting were defined as simultaneous TIACs (siTIACs), and those from separate fitting as separated TIACs (seTIACs). The differences between siTIACs and seTIACs were assessed using relative deviations (RDs), with seTIACs considered equivalent to siTIACs if RD was below 5%. The bi-exponential function successfully describes the renal biokinetic data. seTIACs showed good agreement with the siTIACs, with median[min, max] RD of -1.6[-4.5, 0.8]%. Simultaneous fitting of left and right kidneys biokinetic data using the NLMEM approaches produced similar TIACs to those obtained from separate fittings. Therefore, TIACs from simultaneous and separate fittings of renal biokinetic data are comparable and clinically applicable.
Synthesis and Characterization of TEOS-based Materials for Hydrophobic Corrosion Protection as Silica Irpansyah Siregar; Jon Affi; Yuli Yetri; Hariyati Lubis; Tengku Machdhalie Sofie
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA02

Abstract

This research prepared superhydrophobic protection based on tetraethyl orthosilicate (TEOS) as a silica substitute using the sol-gel method. The raw material involved sodium silicate, TEOS, cetyltrimethylammonium bromide (CTAB) surfactant, and trimethylammonium chloride (TMACl). Characterization techniques employed include Scanning Electron Microscopy coupled with Energy Dispersive Spectroscopy (SEM-EDS), X- Ray Fluorescence (XRF), and X-Ray Diffraction (XRD). According to the XRD analysis, a characteristic diffraction peak of silica was observed at 2θ = 31.680°. The SEM results revealed a uniform surface morphology, attributed to the homogeneous grinding process during sample preparation. The EDS investigation exhibited the elemental compositions of Si, Fe, O, Cl, and C. The XRF analysis confirmed the presence of silicon (Si), originating from TEOS, which was used as the silica source. The water contact angle test shows sample with 10% TEOS has highest angles as 50. 56 degree.
THE EFFECTS OF INTRA-INDIVIDUAL VARIABILITY SETTING ON THE ACCURACY OF TIME-INTEGRATED ACTIVITY CALCULATIONS USING NONLINEAR MIXED-EFFECTS MODELING Fira Dwi Ananda; Assyifa Rahman Hakim; Indra Budiansah; Rien Ritawidya; Deni Hardiansyah
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA04

Abstract

Estimasi yang akurat terhadap time-integrated activity (TIA) penting untuk perencanaan pengobatan pada peptide receptor radionuclide therapy (PRRT). Dalam konteks pemodelan farmakokinetik, intra-individual variability (IAV) — yang berkaitan dengan ketidakpastian pengukuran — dapat memengaruhi estimasi nilai TIA. Penelitian ini bertujuan untuk meneliti dampak variasi pengaturan IAV terhadap perhitungan TIA. Data biokinetik ginjal (PMID: 33443063) dari 10 pasien tumor neuroendokrin setelah pemberian [¹⁷⁷Lu]Lu-DOTATATE dianalisis menggunakan SPECT/CT. Estimasi TIA dilakukan menggunakan Nonlinear Mixed-Effects Modeling (NLMEM) dengan error model proporsional. Metode 1: TIA referensi (rTIA) dihitung dengan mengestimasi inter-individual variability (IIV) and IAV. Metode 2: Nilai IAV kemudian ditetapkan menjadi setengah (hTIA) dan dua kali lipat (tTIA) dari nilai yang diperoleh pada Metode 1. Pengaruh perubahan IAV terhadap akurasi TIA dievaluasi dengan membandingkan hTIA dan tTIA terhadap rTIA menggunakan relative deviation (RD), root-mean-square error (RMSE), dan mean absolute percentage error (MAPE). Hasil menunjukkan bahwa penetapan IAV menjadi setengah dari nilai referensi menghasilkan RMSE sebesar 5% dan MAPE sebesar 3%. Sementara itu, perubahan dua kali nilai IAV menghasilkan RMSE sebesar 7% dan MAPE sebesar 6%. Secara keseluruhan, perubahan pengaturan IAV memberikan dampak yang sangat kecil, karena perhitungan TIA tetap stabil dan tidak sensitif terhadap variasi IAV, baik ketika nilainya dikurangi setengah maupun digandakan dalam data biokinetik populasi ini.
EFFECT OF PATIENT’S GENDER ON THE CALCULATION OF TIME-INTEGRATED ACTIVITY COEFFICIENT IN RADIONUCLIDE THERAPY: STUDY WITH NON-LINEAR MIXED-EFFECTS MODEL Assyifa Rahman Hakim; Fira Dwi Ananda; Indra Budiansah; Rien Ritawidya; Deni Hardiansyah
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA03

Abstract

Purpose: This study investigates the influence of patient gender on the calculation of the Time-Integrated Activity Coefficient (TIAC) in radionuclide therapy. Methods: Kidney biokinetic data (PMID: 33443063) from 10 patients (6 males and 4 females) treated with [¹⁷⁷Lu]Lu-DOTATATE were analysed. A bi-exponential function was used to model both uptake and clearance phases. The reference TIAC (rTIAC) was obtained by fitting the bi-exponential parameters to the complete dataset using a Non-Linear Mixed-Effects Model (NLMEM). To assess the impact of gender, separate NLMEM fits were performed for male and female subgroups to generate estimated TIACs (eTIACs). rTIAC and eTIAC values were compared using the Relative Deviation (RD) and the Root-Mean-Square Error (RMSE). Gender was considered influential if RD or RMSE exceeded 27%. Results: For male patients, the RD was −4.1% ± 7.2% and the RMSE was 8.3%. For female patients, the RD was 5.2% ± 7.8% and the RMSE was 9.4%. Conclusions: Based on the analysed [¹⁷⁷Lu]Lu-DOTATATE biokinetic data, gender does not appear to be a major determinant in TIAC calculation. The deviations between rTIAC and eTIAC remain within an acceptable range for both male and female patients.
ENERGY GAP ANALYSIS OF BA0.25SR0.75TIO3 THIN FILM ON GLASS INDIUM TIN OXIDE (ITO) SUBSTRATE Rony Febryarto; Novia Fransiska Simbolon; Dea Widiawati; Naila Nur Alifa; Irzaman
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA05

Abstract

Ba₀.₂₅Sr₀.₇₅TiO₃ (BST) thin films were fabricated on indium tin oxide (ITO) glass substrates using the chemical solution deposition (CSD) method followed by annealing. The objective of this work was to investigate the effect of Ruthenium (Ru) doping on the optical properties, particularly the band gap energy, of BST thin films. Optical characterization was carried out using UV–Vis spectrophotometry in the wavelength range of 230–850 nm. The results revealed that Ru doping effectively modified the electronic structure of BST, leading to a progressive reduction in band gap energy. On silicon substrates, the band gap decreased from 3.363 eV (undoped) to 1.568 eV (1.5% Ru), while on ITO substrates it decreased from 2.116 eV to 1.698 eV for the same doping level. This decreasing trend indicates that Ru introduces localized states or defect levels within the BST structure, facilitating electronic transitions at lower photon energies. The tunability of the band gap is highly significant for optoelectronic applications. A narrower band gap enhances light absorption in the visible region, which is beneficial for devices such as solar cells, photodetectors, optical sensors, and smart windows. Furthermore, the compatibility of BST with transparent conducting oxides such as ITO strengthens its potential forintegration into multifunctional and energy-efficient devices. In summary, this study demonstrates that Ruthenium doping provides a promising route to tailor the band gap of BST thin films, thereby expanding their applicability in next-generation optoelectronic technologies.
ANALISIS CELAH ENERGI OPTIK NANOROD ZINC OXIDE YANG DITUMBUHKAN PADA ZINC FOIL MENGGUNAKAN TEKNIK HIDROTERMAL Anindita Prameswari Safitri; Adinda Salsabila Khansa; Nurfina Yudasari; Iwan Sugihartono
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA06

Abstract

This study reports the synthesis and optical characterization of zinc oxide (ZnO) nanorods grown on zinc foil substrates via the hydrothermal method. The objective is to investigate the effect of growth duration on the morphology and optical band gap of ZnO. The synthesis was conducted at 95 °C for 4, 8, 12, 16, 20, and 24 hours, using Zn foil as both the substrate and Zn²⁺ source. Characterizations were performed using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and UV-Vis Diffuse Reflectance Spectroscopy (DRS). The results show that all samples exhibit a wurtzite crystal structure with a dominant (002) orientation. The nanorod morphology becomes denser and more uniform at growth durations of 12–24 hours. The band gap increased from 3.11 eV to 3.24 eV, with stable values observed between 12 and 24 hours. Therefore, hydrothermal growth time influences the structural and optical properties of ZnO, with 16–24 hours identified as the optimal duration for optoelectronic applications.
NANOPARTIKEL EMAS (AU): SINTESIS DAN UJI SIFAT ABSORBANSI PADA TEMPERATUR RUANG Laelatul Dalilah; Nadia Istiqomah; Nur Indah Puspita; Affi Nur Hidayah; Iwan Sugihartono
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA07

Abstract

Penelitian ini bertujuan untuk mensintesis nanopartikel emas (Au) menggunakan metode one-step synthesis dengan memanfaatkan sinar UV untuk mereduksi ion HAuCl4 dalam larutan HEPES yang berperan sebagai agen reduksi. Proses sintesis nanopartikel emas dilakukan menggunakan cawan petri dengan dua variasi konsentrasi HAuCl4, masing-masing 0.0026 M dan 0.0001 M, sedangkan konsentrasi HEPES 0.1 M. Setelah itu, sampel disinari dengan sinar UV di dalam rak 1, 2, dan 3 UV chamber selama 10 menit. Karakterisasi dilakukan menggunakan spektrofotometer UV-Vis untuk mendapatkan spektrum absorbansi serta panjang gelombang (wavelength). Hasil sintesis HAuCl4 dengan konsentrasi 0.0026 M menunjukkan warna ungu kemerahan, menandakan pembentukan nanopartikel emas (AuNP). Sementara pada konsentrasi 0.0001 M, larutan tetap bening transparan tanpa rona kemerahan, menandakan hampir tidak ada pembentukan partikel emas. Hasil spektrum UV-Vis mengkonfirmasi bahwa pada sampel 0.0026 M menunjukkan puncak SPR pada rentang 530-540 nm. Sedangkan pada sampel dengan konsentrasi 0.0001 M tidak menunjukkan adanya puncak.
Hybrid DAE-GAN Model with U-Net Architecture for Seismic Signal Denoising Eko Priyatno; Ahmad Kadarisman; Santoso Soekirno; Martarizal
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA08

Abstract

Seismic data is important for geophysical studies, but it often faces interferences that complicate the analysis of underground structures. This research introduces a new method using deep learning to reduce noise in seismic recordings. It combines a Denoising Autoencoder (DAE) with a Generative Adversarial Network (GAN). In this method, a U-Net model serves as the Generator to create a noise-free signal from the contaminated input. A CNN-based Discriminator distinguishes between the generated and original signals. The Generator's loss function includes Mean Squared Error (MSE) for accuracy and Adversarial Loss for realistic features. The model was trained on the STEAD dataset and its performance evaluated with measures like Signal-to-Noise Ratio (SNR), RMSE, and PRD. Results show that this model improves SNR and produces a clean signal similar to the original both visually and spectrally. This approach could enhance automation and efficiency in preprocessing seismic data.
ANALISIS CELAH ENERGI PADA FILM TIPIS Ba0,375Sr0,625TiO3 DI ATAS SUBSTRAT KACA INDIUM TIN OXIDE (ITO) DAN SUBSTRAT SI (100) TIPE P Muhammad Izatul Al Fajar; Novia Fransiska Simbolon; Dea Widiawati; Renny Apriani Dwika Saputri; Habibah Assa’addah; Irzaman
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA09

Abstract

Film tipis Ba0,375Sr0,625TiO3 berhasil difabrikasi pada substrat kaca Indium Tin Oxide (ITO) dan substrat Silikon(100) tipe-P menggunakan metode Chemical Solution Deposition (CSD) dengan larutan prekursor berkonsentrasi 0,5 M. Proses pelapisan dilakukan melalui teknik spin coating pada kecepatan 3000 rpm, diikuti dengan proses annealing pada suhu 550 °C dengan laju pemanasan 100 °C per jam selama 16 jam, kemudian didinginkan secara bertahap hingga suhu kamar. Substrat kaca ITO yang digunakan memiliki ketebalan 1,1 mm dan resistivitas sekitar 20 ohm per kuadrat, sedangkan substrat Si(100) tipe-P memiliki resistivitas sekitar 10 ohm per kuadrat. Sifat optik film tipis dikarakterisasi menggunakan spektrofotometer UV-Vis pada rentang panjang gelombang 230 hingga 850 nm. Hasil pengukuran menunjukkan nilai celah pita energi sebesar 1,57 eV pada substrat ITO dan 2,51 eV pada substrat Si(100) tipe-P. Analisis celah pita dari film tipis Ba0,375Sr0,625TiO3 pada kedua jenis substrat ini penting dilakukan karena material tersebut berpotensi sebagai kandidat utama untuk aplikasi sensor tekanan di masa mendatang.
RANCANG BANGUN LANDSLIDE EARLY WARNING SYSTEM (LEWS) BERBASIS WIRELESS SENSOR NETWORK MENGGUNAKAN ESP32 DAN LORAWAN Bayu Satrio; Agustina Rachmawardani; Agustya Adi Martha; Dwi Indra Prasetyo
Joint Prosiding IPS dan Seminar Nasional Fisika Vol. 14 No. 1 (2026): Joint Prosiding IPS dan Seminar Nasional Fisika
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1401.FA10

Abstract

Tanah longsor merupakan bencana geologis yang berdampak signifikan terhadap keselamatan manusia dan infrastruktur, sehingga diperlukan sistem peringatan dini yang andal. Penelitian ini mengembangkan prototipe Landslide Early Warning System (LEWS) berbasis Wireless Sensor Network (WSN) untuk memantau parameter tanah secara real-time menggunakan tiga node sensor. Masing-masing node dilengkapi dengan sensor akselerometer MPU9250 dan sensor kelembapan tanah kapasitif. Komunikasi antar node dan base station menggunakan protokol LoRaWAN, sementara pengiriman data ke server dilakukan melalui WiFi dengan protokol MQTT. Data ditampilkan melalui antarmuka web berbasis Laravel dan dikirim sebagai notifikasi ke Telegram. Pengujian dilakukan melalui dua simulasi. Pertama, uji komunikasi LoRa menunjukkan jangkauan hingga 100 meter dengan nilai RSSI antara −46 dBm hingga −74 dBm. Kedua, simulasi deteksi longsor menunjukkan lonjakan Peak Ground Acceleration (PGA) mencapai 0.4–0.5 g secara serempak di ketiga node, sebelum kembali ke nilai normal < 0.1 g. Pengamatan kelembapan tanah menunjukkan kestabilan data antara 45%–55. Hasil membuktikan bahwa sistem WSN-LEWS mampu melakukan pemantauan dan transmisi data secara andal, serta memberikan deteksi dini terhadap indikasi longsor melalui perubahan percepatan dan kelembapan tanah.

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