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All Journal Journal of Tropical Soils Jurnal Pendidikan Fisika Indonesia Jurnal Aplikasi Fisika Jurnal Fisika FLUX CIRCUIT: Jurnal Ilmiah Pendidikan Teknik Elektro ComTech: Computer, Mathematics and Engineering Applications Journal of Science and Science Education Jurnal Pengabdian Kepada Masyarakat (JAPIMAS) Jurnal Penelitian Pendidikan Fisika
La Ode Safiuddin La Ode Safiuddin
Physics Department, FMIPA, Universitas Halu Oleo, Kampus UHO Anduonou, Kendari 92231, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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TSUNAMI-MAGNETIC SIGNALS AND MAGNETIC ANOMALY GENERATED BY TSUNAMI WAVE PROPAGATION AT OPEN SEAS Prastowo, T.; Cholifah, L.; Ngkoimani, L. O.; Safiuddin, L. O.
Jurnal Pendidikan Fisika Indonesia Vol 13, No 1 (2017): January 2017
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v13i1.7822

Abstract

This research examines the generation of tsunami-induced magnetic signals, where local magnetic anomaly were measured as variations in the vertical bz and horizontal bH components of the secondary field. The maximum amplitudes of bz and bH were analytically estimated and compared to magnetogram provided by INTERMAGNET and BCMT for the 2010 Chilean, the 2011 Tohoku, the 2010 Mentawai and the 2004 Aceh tsunamis. For the first two cases, frozen-flux theory was used to estimate bz and bH where the phase lag between bz and bH was π/2, relevant to time interval of T/4 between the two signals. For the Mentawai case, oceanic diffusion was unignored and bz significantly deviated from that calculated using the theory. However, the data from Mentawai where bz ≤ 2 nT were in good agreement with bz generated by large tsunamis occurring in regions near the equator and with magnetogram from the Aceh event.
Variation of Chemical Elements and their Associations in Laterite Soil Profile M Tufaila; La Ode Safiuddin; Rosliana Eso; Sitti Kasmiati; Hasbullah Syaf; La Ode Ahmad Nur Ramadhan; . Hasrorayan; . Ardin
JOURNAL OF TROPICAL SOILS Vol 20, No 2: May 2015
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2015.v20i2.111-118

Abstract

The objective of this study was to evaluate the variations of twelve chemical elements (Ni, Fe, Co, Mg, Mn, Al, Si, Zn, Ti, P, Ca and Cr) in laterite soil profiles from Wantulasi area in South East Sulawesi Province of Indonesia. Eighty four (84) samples of three profiles (i.e. each profile consists of eight samples) had been used to study their variations in soil using  the X-Ray Fluorescence (XRF). Results analysis of the chemical elements content in three profile using XRF indicated that there were good correlationsbetween the chemical elements in the soil profile with the significant correlations were found in Ni and Fe, Ni and Si, Ti and P, Fe and Al, and Co and Mn, respectively. On the other hand,the results of study showed that the variations of the chemical elements could be related to the enrichment and translocation of the elements  in soil profile and also their possibilities to be related with a given chemical elements in soil profile. Therefore, we suggest that the observed patterns in chemical elements with a good correlation in laterite profile can be used as proxies to integrate the evaluation of the chemical and physical weathering process based on the elements characteristics in soil profiles.
Accurate local magnitude prediction for small to moderate earthquakes using rapid calculations of P-wave dominant period Tjipto Prastowo; Berla Maghda Putri Mahanani; Latifatul Cholifah; La Ode Ngkoimani; La Ode Safiuddin
Journal of Science and Science Education Vol 1 No 2 (2017): JoSSE Vol. 1 No. 2 (November 2017)
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/josse.v1i2p15-20

Abstract

This study examines mechanisms of rapid and accurate determination of local magnitude Mpd for small to moderate events that occurred in West Sulawesi and Central Sulawesi using direct procedures and calculations of the dominant period Td of P-waveforms. Secondary data were collected from Webdc3, comprising earthquake magnitudes in the regions of interest during 2008-2015 measured in MW. The study focuses on earthquake size estimates for local events as a parameter through simple evaluation of a linear equation relating Td to MW. For all the events considered, empirical formulas derived from the random data for estimating the size are, respectively, Mpd = (Td + 6.6799)/1.5199 for West Sulawesi and Mpd = (Td + 3.3648)/0.8464 for Central Sulawesi. Each was used to recalculate events in the two regions. The results were compared to the reference provided by the Global CMT catalog. The results are consistent with the reference having a standard deviation of up to 0.2, showing evidence of no significant difference in magnitude determination between the method proposed in the current study and that of the Global CMT. This suggests that rapid and accurate magnitude determination is best predicted by the empirical formula developed for each region in this study for future use of disaster risk reduction program.
Ray Tracing Gelombang Pantul dan Gelombang yang dibiaskan oleh Lensa Cembung dan Lensa Cekung menggunakan Program Excel La Ode Rusman; Rosliana Eso; La Ode Safiuddin
Jurnal Aplikasi Fisika Vol 15, No 1 (2019): JAF, Februari 2019
Publisher : Universitas Halu Oleo

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Abstract

Telah dilakukan kajian tentang ray tracing gelombang yang dibiaskan oleh lensa cembung dan lensa cekung menggunakan program excel dengan lengkungan lensa berbentuk lingkaran dan parabola. Penelitian ini menkonfirmasi bahwa dengan perubahan tinggi benda, bayangan yang terbentuk bergeser dari posisi sumula. Ini berarti bahwa pada lensa cembung sinar datang sejajar sumbu utama tidak selalu dibiaskan menuju titik yang secara geometri disebut sebagai titik fokus. Dan pada lensa cekung sinar datang yang sejajar sumbu utama tidak selalu dibiaskan seolah-olah berasal dari titik yang secara geometri disebut sebagai titik fokus
Soil Moisture Monitoring System and Soil PH on IoT-based Aglaonema Crop Rosliana Eso; La Ode Safiuddin; Asih Nofriasih Kalam
Circuit: Jurnal Ilmiah Pendidikan Teknik Elektro Vol 7, No 2 (2023)
Publisher : PTE FTK UIN Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/crc.v7i2.17493

Abstract

Aglaonema is an ornamental plant with soft, watery (herbaceous) stems that dislikes too moist media and needs precise irrigation. Using Internet of Things (IoT) technology, which integrates soil moisture sensors YL-69 Soil moisture sensor, soil pH sensors, and NodeMCU ESP8266 as a microcontroller with the Thingspeak IoT Platform and the Blynk Application via Android, it is possible to monitor soil moisture and pH, which is a determining factor in the planting media for ornamental plant cultivation. Additionally, it may enable remote control operation of a watering system for ornamental plants that holds soil moisture when it exceeds a predetermined threshold. The design of an IoT (Internet of Things)-based soil moisture and pH monitoring system has successfully been applied to the cultivation of ornamental plants. This is expected to help owners of cosmetic plant businesses make decisions based on online information about soil moisture and pH values.
Water Quality Monitoring System Based on the Internet of Things (IoT) for Vannamei Shrimp Farming Rosliana Eso; Hasmina Tari Mokui; Arman Arman; Laode Safiuddin; Husein Husein
ComTech: Computer, Mathematics and Engineering Applications Vol. 15 No. 1 (2024): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v15i1.10657

Abstract

As Internet of Things (IoT) technology develops, water quality monitoring systems for Vannamei shrimp farms have become more inventive and straightforward. The prototype IoT system monitors and controls the pool using sensors that can measure water quality parameters, such as temperature, pH, and salinity. The research aimed to design an automated water quality monitoring system for Vannamei shrimp aquaculture. The research used the E-4052C sensor, DS18B20 sensor, and DFRobot V1.0 sensor as data transmitting hardware (transmitter) and the receiving hardware microcontroller NodeMCU ESP32 as data processing, management, and control system tools. Then, the system used a Wi-Fi network to transfer data from the microcontroller to the Message Queue Telemetry Transport (MQTT) server as a data cloud. Several software programs, including Telegram, Node-Red, and ThingSpeak, help Android devices display real-time data. Test results for the accuracy of the sensor’s reading on water pH are 99.71, with an error rate of 0.29%. Meanwhile, the accuracy of the temperature sensor is 98.03 with an error rate of 1.7%. On the other hand, the accuracy of the salinity sensor is 99.49, with an error rate of 0.41%. The results indicate that all sensors have excellent performance. The real-time monitoring display and Android Telegram notification functions are good, and the automatic water quality monitoring tool is successfully operating in the Vannamei shrimp pool in Pamandati, South Konawe District, Southeast Sulawesi ssProvince, Indonesia.
Determining Bouncepoints in the South of Kalimantan Island for SS Wave Phase Fahruddin Fahruddin; Gusti Aldy; Muhammad Rasyid Ridho; Ibrahim Ibrahim; Nurlina Nurlina; Sudarningsih Sudarningsih; Mustaid Yusuf; Syamsurijal Rasimeng; La Ode Safiuddin
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 3 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i3.17280

Abstract

The bouncepoints or reflection point of a seismic wave is very important to determine a research area that utilizes SS precursors data. In this study the data used has criteria, to obtain good data. Hence, the research results are also good, while the criteria are: the depth of the earthquake source is limited to less than 75 Km to reduce interference with precursor waves that arrive earlier (sSdiff) and it is easier to determine the bouncepoint. The earthquake source is more than 5.8 Mw to get a good SS phase signal-to-noise ratio (SNR). The best distance between the source and the receiving station is ≥ 1000 to avoid interference with waves reflected on the surface (Ss670s and Ss400s) and ≤ 1650 to avoid interference with ScSScS precursors. The location of this study is in the south of the island of Kalimantan (15 bouncepoints) and there are 3 points data whose bouncepoints is outside the study area. Earthquake data obtained from IRIS (Incorporated Research Institutions for Seismology). The research data for earthquake centers are in Australia, New Zealand and others, for earthquake measuring stations in Europe and Asia.
Penerapan pembelajaran STEAM untuk meningkatkan keterampilan siswa SDN 3 Sabilambo dalam memanfaatkan lingkungan sebagai media belajar di masa pandemik covid-19 Arman; Rosliana Eso; Tahir; Husein; Mardiana Napirah; La Ode Safiuddin; La Agusu
Jurnal Pengabdian Kepada Masyarakat (JAPIMAS) Vol. 1 No. 1 (2022): Februari 2022
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/japimas.v1i1.1

Abstract

Dalam rangka menangani keterbatasan pembelajaran di sekolah dasar dalam masa pandemi COVID-19, maka dipandang perlu untuk menggunakan metode pembelajaran yang sesuai guna meningkatkan pemahaman siswa mengenai materi pembelajaran di kelas. Metode STEAM (Science, Technology, Engineering, Arts, and Math) merupakan metode yang sangat tepat dan efektif dalam pelaksanaan pembelajaran jarak jauh (PJJ) yang dirangkaikan dengan aktivitas tatap muka terbatas. Tujuan kegiatan pengabdian ini adalah memberikan keterampilan bagi guru-guru SDN 3 Sabilambo dalam menyusun paket pembelajaran STEAM dan menghasilkan panduan Pelaksanaan Pembelajaran STEAM dengan pendekatan saintifik. Setelah media dan perangkat pembelajaran tersebut selesai dibuat, guru-guru menerapkan metode pembelajaran STEAM kepada peserta didiknya. Selanjutnya pre-test dan post-test yang disertai uji T berpasangan menunjukkan bahwa nilai t hitung > t tabel, yaitu 12,71095 > 2,09302, yang berarti bahwa perlakuan berupa pembelajaran STEAM memberikan pengaruh yang signifikan, yaitu dapat meningkatkan pemahaman siswa mengenai materi yang diajarkan.
Meningkatkan Kualitas Pembelajaran pada Masa Pandemi COVID-19 Melalui Pelatihan Pembuatan Paket Media Pembelajaran Online Rosliana Eso; Mardiana Napirah; La Ode Safiuddin; Arman; Tahir; Sitti Kasmiati; La Harudu
Jurnal Pengabdian Kepada Masyarakat (JAPIMAS) Vol. 2 No. 1 (2023): Februari 2023
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/japimas.v2i1.25

Abstract

Media pembelajaran yang mendukung pembelajaran online  sangat dibutuhkan dalam rangka meningkatkan kualitas pembelajaran khususnya pada masa pandemi COVID-19,  sehingga dipandang perlu untuk melakukan pelatihan pembuatan paket media pembelajaran  kepada guru di sekolah-sekolah yang tersebar di berbagai Kabupaten/Kota di provinsi Sulawesi Tenggara.  Pelatihan dan pendampingan yang dilakukan merupakan program dari kegiatan pengabdian yang diintegrasikan dengan KKN Tematik yang melibatkan mahasiswa dan dilakukan pada bulan Juni hingga September 2020. Tahapan kegiatan pelatihan dan pendampingan yang dilakukan adalah: (a) melakukan pengembangan silabus berkelanjutan, menyusun RPP serta memilah mata pelajaran IPA-Fisika yang relevan, (b) memberikan pelatihan kepada mahasiswa peserta KKN mengenai proses pembuatan perangkat pembelajaran dan media pembelajaran berbasis Web, dan (c) melakukan monitoring transfer pengetahuan dari mahasiswa peserta KKN kepada guru mitra. Proses pendampingan dan monitoring juga dilakukan untuk memastikan guru mengimplementasikan media pembelajaran yang telah dibuatnya dalam pembelajaran di kelas. Hasil dari kegiatan yang diracang selama satu semester diperoleh (a) meningkatnya pengetahuan dan keterampilan guru mengenai pembuatan media pembelajaran online, (b) tersedianya paket pembelajaran online yang dibuat oleh guru, (c) diterapkannya proses belajar online oleh guru di kelas dengan menggunakan media pembelajaran yang telah dibuatnya selama kegiatan pelatihan, dan (d) meningkatnya kualitas pembelajaran di kelas yang memanfaatkan paket media pembelajaran online oleh guru mitra. Berdasarkan hal tersebut maka kegiatan ini sangat bermanfaat dan merupakan salah satu upaya menjaga dan meningkatkan kualitas pembelajaran dari rumah selama lockdown di masa pandemi COVID-19.
Pengembangan Lembar Kerja Peserta Didik (LKPD) Model Pembelajaran CinQASE untuk Meningkatkan Keterampilan Berfikir Kritis dan Prestasi belajar Peserta Didik Pada Materi Usaha dan Energi SMA Kelas X Yuli Yanti; Muhammad Anas; La Ode Safiuddin
Jurnal Penelitian Pendidikan Fisika Vol. 8 No. 1 (2023): Januari 2023
Publisher : Jurusan Pendidikan Fisika FKIP Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36709/jipfi.v8i1.5

Abstract

Penelitian yang telah dilakukan bertujuan untuk mengasilkan LKPD Model Pembelajaran CinQASE pada materi usaha dan energi untuk merungkatkan keterampilan herpiku kntis dan prestasi belajar peserta didik kelas X yang memenuhi kritena valid, efektif dan praktis Penelitian yang dilakukan merupakan penelitian pengembangan R & D (Research and Development) dengan metode 4 D dengan tahap yaitu pendefinisan (define), perancangan (design), pengembangan ( development), dan penyeban (dessiminate) LKPD yang telah dikembangkan di uji coba di SMA Negen 1 Bondola pada kelas X Instrumen penelitian dan lembar validasi, angket dan tes tertulis data keefektifan LKPD dilihat dan penilaian instrument respon pengamat, respon guru dan respon peserta didik Data keefektifan LKPD di lihat dari peningkatan prestasi belajar peserta didik dengan instrumen tes tertulis berupa pretest dan posttest. Hasil penelitian menunjukan bahwa LKPD dinyatakan layak dan aspek kontruk diperoleh n - againya 0,823 dan aspek konten isi diperoleh n-againya 0,841 dengan kategon Sangat Valid dan keefektifan dan hasil peningkatan berpikir kritis uji terbatas dan uji luas pada pretest sebesar 47,5 dan 44,7 dengan kategori Tidak Tuntas dan pada posttest untuk coba terbatas dan uji coba luas sebesar 79,5 dan 80,3 dengan kategori Tuntas Pada prestasi belajar peserta didik pada uji coba terbatas dan uji coba luas pada pretest 53.75 dan 50,7 temaksud dalam kategori Tidak Tuntas dan pada postest untuk uji coba terbatas dan uji coba luas 79,46 dan 80 dalam kategori Tuntas Nilai kepraktisan dan keterlaksanaan dengan kategon baik.
Co-Authors . Ardin . Hasrorayan Anas, Muhammad Arman Arman Arman Arman Asih Nofriasih Kalam Berla Maghda Putri Mahanani Fahruddin Fahruddin Gusti Aldy Hasbullah Syaf Hasmina Tari Mokui Husein Husein Ibrahim Ibrahim L. Cholifah, L. L. O. Ngkoimani, L. O. La Agusu La Harudu La Ode Ahmad Nur Ramadhan La Ode Ngkoimani La Ode Rusman Latifatul Cholifah M Tufaila Mardiana Napirah Muhammad Rasyid Ridho Mustaid Yusuf Nurlina Nurlina Rosliana Eso Rosliana Eso Rosliana Eso Sitti Kasmiati Sitti Kasmiati Sudarningsih Sudarningsih Syamsurijal Rasimeng T. Prastowo Tahir Tahir Tjipto Prastowo Yuli Yanti