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All Journal Jurnal Teknologi Reaktor Nuklir Tri Dasa Mega JFA (Jurnal Fisika dan Aplikasinya) Briliant: Jurnal Riset dan Konseptual Jurnal Pendidikan Bahasa HIGIENE: Jurnal Kesehatan Lingkungan INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Pengabdian Pada Masyarakat Indonesian Journal of Chemistry Journal of Physics and Its Applications Jurnal Ilmiah Kesehatan Ar-Rum Salatiga Journal of Computer System and Informatics (JoSYC) SEMAR Eduproxima : Jurnal Ilmiah Pendidikan IPA Journal of Informatics Management and Information Technology Education Achievement: Journal of Science and Research Indonesian Journal of Nursing and Health Sciences (IJNHS) Counseling and Humanities Review Journal of Artificial Intelligence and Digital Business Innovative: Journal Of Social Science Research Sahabat Sosial: Jurnal Pengabdian Masyarakat International Journal of Health Sciences Jurnal Ilmu Pendidikan dan Humaniora Lunggi Journal Pengabdian Pendidikan Indonesia (PPI) Bulletin of Chemical Reaction Engineering & Catalysis Physio Move Journal (PMJ) Jurnal Pendidikan Vokasi Indonesia Jurnal Wacana Kinerja: Kajian Praktis-Akademis Kinerja dan Administrasi Pelayanan Publik
Utari Utari
Physics Department, Faculty Of Mathematics And Natural Sciences, Universitas Sebelas Maret, Jl. Ir. Sutami 36A, Kentingan, Jebres, Surakarta 57126
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Journal : indonesian journal of applied physics

 1 
Sistem Pengukuran Detak Jantung Janin Melalui Elektrokardiogram Abdominal dan Android Aji, Yusuf Anggara; Nuryani, Nuryani; Wiyono, Nanang; Yunianto, Mohtar; Purnama, Budi; Utari, Utari; Riyatun, Riyatun; Suharno, Suharno; Raharjo, Dwi Teguh
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 2 (2022): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i2.65287

Abstract

An android-based fetal heart rate measurement is presented in this article. The fetal heart rate was obtained from the mother's abdominal electrocardiogram which was then measured and processed by Raspberry pi using k-means. Raspberry pi processed results produce ECG signals and fetal heart rate which was displayed on Android devices in real-time. The android application can also save heart rate and ECG data or retrieve previously taken heart rate recordings. The system obtained that the average value of accuracy, sensitivity and predictive positive were 90.49%, 97.10% and 93.03%, respectively. The variation of the training time of the algorithm showed that the training time of 10 and 15 seconds mostly has better performance than the training time of 5 seconds.
Comparison of Ni0.6Co0.4Fe2O4 and NiFe2O4 Nanoparticles for Magnetic Characteristics, Synthesized Using Co-Precipitation Method Utari, Utari; Dasi, Yeni Herlina K.; Purnama, Budi
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.59191

Abstract

Comparison of nickel Ni0.6Co0.4Fe2O4   and NiFe2O4 were studied. The co-precipitation method was performed for the whole sample. After annealing of 600°C for 4 hours, the nanoparticles samples evaluated their structural properties by using Fourier Transform Infra-Red (FTIR) and X-Ray Diffraction (XRD). The XRD pattern confirms that the whole samples have the crystalline structure of the face-centered cubic (fcc) inverse spinel. Furthermore, the lattice and crystallite size of NiFe2O4 increased when added Co2+. The FTIR spectrum showed two prominent absorption bands, i.e., at around k of 358 cm-1 and 588 cm-1, where metals at tetrahedral and octahedral sites reflect intrinsic vibrations, respectively.  Finally, the decrease of saturated magnetization MS from 22.2 emu/g and 9.92 emu/g replacement of Co2+ cation with Ni2+.
Co-Authors ', Khairunnisa Ahmad Saifudin, Ahmad Aji, Yusuf Anggara Anggreni, Milka Arini Vika Sari Artono Dwijo Sutomo Artono Dwijo Sutomo Astuti, Retno Puji Azizul Khakim Azizul Khakim, Azizul Bahrun, Suriani Belangi, Siska Putri Bibit Cahyani Budi Legowo Budi Purnama Budi Purnama Budi Purnama Budi Purnama Candra Tirta Putra Dasi, Yeni Herlina K. Dian Afif Rusydan Dina Sukma Dwi Teguh Rahardjo Eko Prastyo Ellanda Purwawijaya Elly Fatmawati Fajar Arianto Fatmawati, Elly Fonita, Elvira Freditia Fuad Anwar, Fuad Hanafi Eko Prasetyo Hasmar, Wanti Hayati, Widia Indradewa, Rhian Ismail Ismail Juwariyah, Siti Kamsul Abraha Kamsul Abraha Khairunnisa Khairunnisa Kristina Maharani, Kristina Kusumandari, Kusumandari Listina, Osie Lizawati Lizawati Lonik, Lorensius Luqman Satria Pradana Meiliawati, Indri Mohtar Yunianto Mohtar Yunianto, Mohtar Mudasir Mudasir Muhammad Amin Muhammad Asyura Muhammad Iqbal Muhammad Syahputra Novelan Muhtarom Muhtarom Mujahidin Mujahidin Mukriani, Mukriani Musadewi, Adiana Musilawati, Fida Ayu nafisatuzzahro' nafisatuzzahro' nafisatuzzahro' Nainggolan, Nurcahaya Nanang Wiyono Nining Hargiani Novianty, Natasha Nur Wahyuni Nuryani Nuryani Oki Dewi Pamungkas Oktavianto, Eka Prasetya, Nurdiyantoro Putra PUTU LUSITA NATI INDRIANI Raharjo, Dwi Teguh Rahmawati, Ramadona Rambe, Siska Mayasari Ricda Nurhikmayanti Hamzah Riyatun Riyatun Riyatun, Riyatun Rizki Yulia Purwitaningtyas, Rizki Yulia Sahalessy, Yona C. Saputra Junaidi, Adi SARI, DIAN NUR ADKHANA Sihotang, Minora Sihotang, Togarman Simanullang, Rahma Yuni Soraya, Syazarah Sri Budiawanti Sri Windani Sudirman Suharno Suharno Suharyana Suharyana Sulistiyana, Defi Suryati Suryati SyahPutri, Chairani Syahri, Rahma Tambunan, Maha Valne Datin Mahfujah Timiyatun, Endar Ula, Zumrotul Vina Oktaria Wanny, Puspita Wati Wati Widiarini, Widiarini Wiji Lestari Yermi, Yermi Yofentina Iriani Yulis, Dian Meiliani Yuni Wulandari Yunita Suriani Suardi