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All Journal RADIASI: Jurnal Berkala Pendidikan Fisika ILMU KELAUTAN: Indonesian Journal of Marine Sciences BERKALA FISIKA Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains Dasar Jurnal Pendidikan Fisika Indonesia Jurnal Teknosains Prosiding Semnastek JFA (Jurnal Fisika dan Aplikasinya) Jurnal Fisika FLUX Indonesian Journal of Science and Education Titian Ilmu: Jurnal Ilmiah Multi Sciences Jurnal Penelitian Pendidikan IPA (JPPIPA) JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Indonesian Journal of Chemistry Jurnal Teori dan Aplikasi Fisika Jurnal Sains dan Edukasi Sains Journal of Science and Science Education Jurnal Kependidikan: Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran dan Pembelajaran Journal of Fundamental Mathematics and Applications (JFMA) Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) Magistrorum et Scholarium: Jurnal Pengabdian Masyarakat
Ferdy Semuel Rondonuwu
Universitas Kristen Satya Wacana
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Other

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Model Penduga Kadar Glukosa dalam Jus Buah Menggunakan Spektroskopi Inframerah-dekat dan Regresi Kuadrat Terkecil Parsial Samalukang, Dina N; Rondonuwu, Ferdy Semuel; Pratiwi, Indri D; Sutresno, Adita
Jurnal Sains dan Edukasi Sains Vol. 7 No. 2 (2024): Jurnal Sains dan Edukasi Sains
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/juses.v7i2p74-80

Abstract

Glukosa merupakan gula alami yang terdapat dalam buah segar dan memainkan peran penting pada  rasa dan derajat kemanisan jus buah tersebut. Mengetahui kadar glukosa dalam jus buah murni berguna untuk pengendalian kualitas dan pelabelan gizi serta memastikan bahwa konsumen mendapatkan produk yang mereka harapkan. Paper ini membahas teknik pendugaan kadar kandungan glucosa jus buah menggunakan spektroskopi inframerah dekat (Near-Infrared Spectroscopy, NIRS) dan metode Regresi Kuadrat Terkecil Parsial (Partial Least Square Regression, PLSR). Sebanyak 14 sample glukosa-akuades dengan konsentrasi antara 0 – 2500 mg/dL digunakan sebagai sumber data spektral pembangun model regresi sedangkan sampel jus dari 10 jenis buah digunakan sebagai sumber data spektral target penentuan kadar glukosa berdasarkan model yang dibangun. Seluruh data spektral dianalisis pada daerah bilangan gelombang 4200 – 4800 cm-1. Pra-perlakuan data meliputi smoothing, normalisasi, turunan pertama, dan turunan kedua diterapkan pada masing-masing spektrum. Penggunaan variabel laten sebanyak 4 menghasilkan PRESS (Predicted Residual Error Sum Of Square) terkecil atau hasil prediksi yang optimal. Model prediksi yang dihasilkan mampu  menentukan kadar glukosa dengan nilai RMSE 3 mg/dL pada data kalibrasi dan dapat menentukan kadar glukosa jus buah tertinggi yaitu 713 mg/dL pada tebu dan kadar glukosa terendah yaitu 247 mg/dL pada kelapa.
Development of Servant Leadership Training Modules to Improve The Performance of Educators and Educational Staff Aktivia Ismi Lestari; Ferdy Semuel Rondonuwu; Yari Dwikurnaningsih
Jurnal Kependidikan: Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran dan Pembelajaran Vol 11, No 1 (2025): March
Publisher : Universitas Pendidikan Mandalika (UNDIKMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jk.v11i1.13607

Abstract

This study aims to develop a Servant Leadership training module to improve the performance of educators and educational staff. The research employed the research and development (R&D) method using the Borg & Gall model, involving several stages from preliminary research, planning, draft development, initial field testing, and product revision, to implementation testing. Data collection was conducted through observations, interviews, questionnaires, pretests, and post-tests on a small-scale trial with six respondents and a large-scale trial with 30 respondents, including school principals, teachers, and educational staff in Central Lampung. The collected data were analyzed using descriptive analysis and statistical tests. This research resulted in a Servant Leadership training module designed to enhance the performance of educators and educational staff. Qualitative descriptive analysis indicated an urgent need for Servant Leadership training, while quantitative analysis demonstrated the effectiveness of the module, with a significant increase in pretest and post-test scores from 55.0 to 90.6. Expert validation confirmed the module's high feasibility, with a feasibility level of 92%. The main-scale trial also confirmed its feasibility with an 82.9% feasibility level, and the large-scale trial demonstrated a very high feasibility level of 91.2%. This module includes concept introduction, case studies, implementation strategies, reflection, and evaluation. The findings suggest that this module provides a practical solution for supporting the application of Servant Leadership principles and is expected to be effective in improving the performance of educators and educational staff.
Prediksi Aspek Evolusi Xantofil pada Exiguobacterium Sp. yang Berasosiasi dengan Halimeda Macroloba, Hasil Isolasi dari Perairan Pulau Menjangan Kecil, Karimunjawa Astuti, Wiwik; Radjasa, Ocky Karna; Karwur, Ferry Fredy; Rondonuwu, Ferdy Semuel
Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) 2016: Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (698.617 KB)

Abstract

Xantofil merupakan oksikarotenoid yang memiliki kemampuan sebagai fotoprotektor, sehingga merupakan senyawa antioksidan yang potensial. Sebarannya yang luas dari tumbuhan tingkat tinggi hingga organisme tingkat rendah, termasuk pada bakteri, menyebabkan xantofil mudah didapat, terlebih lagi dengan sifat kepolarannya, membuat pigmen oksikarotenoid ini relatif mudahuntuk diisolasi dari senyawa karoten lain. 3 jenis xantofil, yaitu dinosantin, P457, dan diadinokrom yang teridentifikasi dari Exiguobacterium sp. MK_HM, bakteri yang berasosiasi dengan karang Halimeda macroloba, hasil isolasi dari perairan Pulau Menjangan Kecil, Karimunjawa, memiliki kesamaan dengan xantofil yang dihasilkan oleh beberapa Dinoflagellata. Hal ini dimungkinkan karena efek asosiasi sekunder yang dilakukan inangnya, Halimeda macroloba dengan Dinoflagellata tertentu.
Development of Servant Leadership Training Modules to Improve The Performance of Educators and Educational Staff Lestari, Aktivia Ismi; Rondonuwu, Ferdy Semuel; Dwikurnaningsih, Yari
Jurnal Kependidikan : Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran, dan Pembelajaran Vol. 11 No. 1 (2025): March
Publisher : LPPM Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jk.v11i1.13607

Abstract

This study aims to develop a Servant Leadership training module to improve the performance of educators and educational staff. The research employed the research and development (R&D) method using the Borg & Gall model, involving several stages from preliminary research, planning, draft development, initial field testing, and product revision, to implementation testing. Data collection was conducted through observations, interviews, questionnaires, pretests, and post-tests on a small-scale trial with six respondents and a large-scale trial with 30 respondents, including school principals, teachers, and educational staff in Central Lampung. The collected data were analyzed using descriptive analysis and statistical tests. This research resulted in a Servant Leadership training module designed to enhance the performance of educators and educational staff. Qualitative descriptive analysis indicated an urgent need for Servant Leadership training, while quantitative analysis demonstrated the effectiveness of the module, with a significant increase in pretest and post-test scores from 55.0 to 90.6. Expert validation confirmed the module's high feasibility, with a feasibility level of 92%. The main-scale trial also confirmed its feasibility with an 82.9% feasibility level, and the large-scale trial demonstrated a very high feasibility level of 91.2%. This module includes concept introduction, case studies, implementation strategies, reflection, and evaluation. The findings suggest that this module provides a practical solution for supporting the application of Servant Leadership principles and is expected to be effective in improving the performance of educators and educational staff.
PENGEMBANGAN PEMBELAJARAN STEAM BERBASIS KEARIFAN LOKAL MENENUN UNTUK MENINGKATKAN KEMAMPUAN MENCIPTA SISWA SD Jouis Nieldy Otemusu; Helti Lygia Mampouw; Ferdy S. Rondonuwu
Jurnal Penelitian Pendidikan IPA Vol 11 No 9 (2025): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i9.11712

Abstract

This study aims to describe and analyze the application of Science, Technology, Engineering, Arts, and Mathematics (STEAM) learning assisted by ikat weaving in improving the creative abilities of fifth-grade students of SDN Sonraen, South Amarasi District, Kupang Regency, East Nusa Tenggara. The research method uses a descriptive qualitative approach with 32 students divided into eight heterogeneous groups. Data were collected through observation, assessment rubrics, interviews, questionnaires, and tests, then analyzed with the stages of data reduction, data presentation, and drawing conclusions according to the Miles & Huberman model. The results show that the application of STEAM learning assisted by ikat weaving can facilitate the active involvement of students in creative, collaborative, and problem-solving thinking processes through local culture-based activities. Students are able to produce simple woven works that combine aesthetic elements with the principles of science and technology. In addition, this activity improves students' creative abilities as seen from original ideas, problem-solving skills, and appreciation of local wisdom. Thus, culture-based STEAM learning is proven to be effective in fostering creativity while strengthening students' cultural identity. The conclusion of the research using the STEAM approach assisted by ikat weaving has proven effective in building students' creative abilities while making the learning process more contextual, enjoyable, and meaningful
Analisis Dosis Radiasi di Sekitar Area Ruangan CT Simulator di Rumah Sakit Umum Daerah Dok II Kota Jayapura Eskelon Kalvin Sanggemi; Ferdy Samuel Rondonuwu; Giner Maslebu
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 22, No 2 (2025): 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.v22i2.22014

Abstract

Radioterapi merupakan salah satu metode pengobatan kanker yang menggunakan radiasi pengion seperti sinar gamma, sinar-X, elektron, proton, dan neutron. Dalam praktiknya, instalasi radioterapi harus memenuhi standar keselamatan radiasi untuk melindungi pasien, petugas, dan masyarakat di sekitarnya. Penelitian ini bertujuan untuk menganalisis tingkat paparan radiasi di sekitar area ruang CT-Simulator pada Instalasi Radioterapi Rumah Sakit Umum Daerah (RSUD) Dok II Jayapura. Pengukuran dilakukan untuk memastikan bahwa desain dan perlindungan radiasi pada ruangan tersebut telah sesuai dengan nilai batas dosis (NBD) yang ditetapkan oleh Badan Pengawas Tenaga Nuklir (BAPETEN), yaitu ≤ 50 mSv per tahun bagi pekerja, sebagaimana tercantum dalam Peraturan BAPETEN Nomor 4 Tahun 2013. Data diperoleh melalui uji paparan radiasi menggunakan pesawat CT-Simulator merek Siemens Mobile 64-slice. Hasil pengukuran menunjukkan adanya kebocoran radiasi pada beberapa titik, yaitu di pintu utama, pintu samping, dan lantai dua ruang CT-Simulator. Berdasarkan temuan ini, disimpulkan bahwa perlu dilakukan renovasi pada area yang teridentifikasi mengalami kebocoran. Jika belum terdapat lapisan pelindung seperti timbal, maka direkomendasikan pemasangan timbal sebagai material perisai radiasi untuk memastikan keselamatan radiasi di lingkungan sekitar instalasi.
Pengujian Material Absorpsi Bunyi dari Serbuk Kayu Menggunakan Tabung Impedansi Dua Mikrofon Felix Marcellino Henrikus; Adita Sutresno; Ferdy Semuel Rondonuwu
Jurnal Teori dan Aplikasi Fisika Vol. 13 No. 01 (2025): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v13i01.455

Abstract

A study was conducted to test sound-absorbing materials made from teak wood waste by comparing the effect of the number of holes in the material on its absorption coefficient. This research utilized a two-microphone impedance tube with a length of 1.82 m and a diameter of 0.07 m, where the sound propagation speed was determined by measuring the fundamental frequency based on the open organ pipe principle. By determining this propagation speed, the resonance frequency of the tube was used as the basis for measuring the absorption coefficient, and the microphones were positioned at the nodes and antinodes of the standing wave at each frequency to obtain the standing wave ratio. The results indicated that non-perforated and perforated materials exhibited different absorption patterns, with non-perforated material being more effective in absorbing sound at low frequencies, while perforated material showed a broader absorption effectiveness at medium to high frequencies. Thus, the design of sound-absorbing materials with holes offers a more flexible and adaptive solution for noise control in various environmental conditions, making it a potential innovation in acoustic technology and the development of environmentally friendly materials. Keywords: sound absorption coefficient, acoustic panels, impedance tube, standing waves.
Development of an Integrated "Vein" Pop-Up Book Media for Science Number Patterns in Increasing Interest and Critical Thinking Ria Budi Astuti; Helti Lygia Mampouw; Ferdy Semuel Rondonuwu
Jurnal Penelitian Pendidikan IPA Vol 12 No 1 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i1.14191

Abstract

Science learning in elementary school plays an important role in developing students’ learning interest and critical thinking skills. However, students often experience difficulties in understanding abstract concepts such as vertebrate and invertebrate classification due to limited interactive learning media. This study aimed to develop and evaluate the feasibility and effectiveness of an integrated learning medium called the “VEIN” (Vertebrate–Invertebrate) flashcards and 3D pop-up book to increase students’ learning interest and critical thinking skills. This research employed a Research and Development (R&D) design conducted in two elementary schools in Jambi City involving 16 third-grade students. Data were collected through observation, interviews, questionnaires, documentation, and critical thinking tests, and analyzed quantitatively using percentage analysis. The results showed that 62.5% of students were categorized as having high learning interest, 25% medium, and 12.5% low. Critical thinking skills improved particularly in interpretation (68.75%) and analysis (62.5%) indicators, while inference reached 43.75% in the medium category. These findings indicate that the VEIN media effectively promotes active engagement, facilitates concrete conceptual understanding, and supports the gradual development of critical thinking skills. In conclusion, the VEIN flashcards and pop-up book are feasible, practical, and effective as innovative media to enhance learning interest and critical thinking in integrated elementary science learning
Co-Authors Adita Sutresno Adita Sutresno Aditya Toraismaya Aji, P. P. Aktivia Ismi Lestari Aldovina Kristin Muniarti Alvama Pattiserlihun Andreas Setiawan Andriyani Rosita Sari Antonius Budi Susanto Debora Natalia Sudjito Eskelon Kalvin Sanggemi Felix Marcellino Henrikus Ferry Fredy Karwur Galuh K. Wardhani Giner Maslebu Hafidz Bahtiar Helti Lygia Mampouw Helti Lygia Mampouw Ida Kristiani Jessica R. Setyanto Jodelin Muninggar, Jodelin Jouis Nieldy Otemusu Jubhar Mangimbulude Julianto Patawaran Kabul Eko Wiyono Leopoldus Ricky Sasongko Lestari, Aktivia Ismi Mardon Limena Marmi Sudarmi Martanto Martosupono Martha Febryana Marthen Billy Jesajas Mayasari, Anisa Mega Novita Monika Rahardjo Nur Aji Wibowo Ocky Karna Radjasa Paulus Damar Bayu Murti Pratiwi, Indri D Putri, Dera Anastasya Ria Budi Astuti Riana Amalia Sabrina Aprilisa Martha Samalukang, Dina N Sepriyanti Manialoka, Sepriyanti Setiyani, A. Suryasatriya Trihandaru Wahyu Hari Kristiyanto Welmince Bota Wiwik Astuti Yari Dwikurnaningsih Yayi Suryo Prabandari Yohanes Martono Yohannes Sardjono