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Karakterisasi Moringa oleifera Sebagai Pewarna Alam dalam Dye-Sensitized Solar Cell (DSSC) Obina, Wilfrida Mayasti; Jua, Selestina Kostaria; Weri, Firda
Lensa: Jurnal Kependidikan Fisika Vol 13, No 1: June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v13i1.15475

Abstract

Dye-Sensitized Solar Cell (DSSC) merupakan generasi ke tiga dari sel surya yang memanfaatkan dye dari bahan alam. DSSC menggunakan dye alam untuk menyerap cahaya matahari dan diubah menjadi energi listrik secara langsung. Perubahan energi matahari menjadi energi listrik akan menjawab tantangan dunia dalam keterbatasan energi fosil. Dye yang digunakan dalam penelitian ini adalah dye Moringa oleifera. Karakterisasi optik dari dye Moringa oleifera diukur menggunakan spektrofotometer UV-VIS dan diperoleh hasil terdapat tiga puncak penyerapan yaitu pada 334 nm, 412 nm, dan 665 nm. Uji konduktivitas menunjukkan dye Moringa oleifera memiliki nilai 0,49 x 10-3 Ω-1m-1 yang berarti memiliki kemampuan menghantarkan listrik dengan baik. Hasil uji FTIR dye Moringa oleifera diperoleh ada gugus fungsi O-H, C-H, CC, C=O dan C-O. Karakterisasi DSSC menggunakan dye Moringa oleifera diperoleh efisiensi sebesar 0,50 x 10-1%. Hasil kerakterisasi dalam penelitian ini menunjukkan bahwa dye Moringa oleifera tepat untuk dijadikan sentitiser dalam DSSC karena memberikan performa yang baik.
Dampak Kendala Belajar Internal Terhadap Partisipasi dan Keberlanjutan Studi Mahasiswa Asli Papua Jua, Selestina Kostaria; Sumanik, Novike Bela; Obina, Wilfrida Mayasti; Reski, Andi
Lensa: Jurnal Kependidikan Fisika Vol 13, No 1: June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v13i1.15507

Abstract

The declining academic participation and study persistence among Indigenous Papuan students at Universitas Musamus highlight a critical issue that demands thorough investigation. While various external factors have been previously examined, this study specifically focuses on internal learning barriers, which remain underexplored in the context of higher education in Papua. The aim of this research is to explore key internal constraints affecting students' academic engagement, including motivation, comprehension of course materials, learning strategies, and personal or social disruptions. Employing a qualitative case study approach and Miles and Huberman’s interactive data analysis model, data were collected through open-ended questionnaires and semi-structured interviews with Indigenous Papuan students. The findings reveal a complex interplay of internal challenges such as low motivation, self-doubt, ineffective learning approaches, and physical or psychological discomforts that hinder students’ learning processes. These internal barriers not only reduce classroom engagement but also negatively impact students’ perseverance in completing their studies. The study underscores the urgent need for contextually responsive and sustained institutional support, such as academic and psychosocial mentoring programs, to foster holistic success among Indigenous Papuan university students.
Karakterisasi Moringa oleifera Sebagai Pewarna Alam dalam Dye-Sensitized Solar Cell (DSSC) Obina, Wilfrida Mayasti; Jua, Selestina Kostaria; Weri, Firda
Lensa: Jurnal Kependidikan Fisika Vol. 13 No. 1: June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v13i1.15475

Abstract

Dye-Sensitized Solar Cell (DSSC) merupakan generasi ke tiga dari sel surya yang memanfaatkan dye dari bahan alam. DSSC menggunakan dye alam untuk menyerap cahaya matahari dan diubah menjadi energi listrik secara langsung. Perubahan energi matahari menjadi energi listrik akan menjawab tantangan dunia dalam keterbatasan energi fosil. Dye yang digunakan dalam penelitian ini adalah dye Moringa oleifera. Karakterisasi optik dari dye Moringa oleifera diukur menggunakan spektrofotometer UV-VIS dan diperoleh hasil terdapat tiga puncak penyerapan yaitu pada 334 nm, 412 nm, dan 665 nm. Uji konduktivitas menunjukkan dye Moringa oleifera memiliki nilai 0,49 x 10-3 Ω-1m-1 yang berarti memiliki kemampuan menghantarkan listrik dengan baik. Hasil uji FTIR dye Moringa oleifera diperoleh ada gugus fungsi O-H, C-H, CC, C=O dan C-O. Karakterisasi DSSC menggunakan dye Moringa oleifera diperoleh efisiensi sebesar 0,50 x 10-1%. Hasil kerakterisasi dalam penelitian ini menunjukkan bahwa dye Moringa oleifera tepat untuk dijadikan sentitiser dalam DSSC karena memberikan performa yang baik.
Dampak Kendala Belajar Internal Terhadap Partisipasi dan Keberlanjutan Studi Mahasiswa Asli Papua Jua, Selestina Kostaria; Sumanik, Novike Bela; Obina, Wilfrida Mayasti; Reski, Andi
Lensa: Jurnal Kependidikan Fisika Vol. 13 No. 1: June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v13i1.15507

Abstract

The declining academic participation and study persistence among Indigenous Papuan students at Universitas Musamus highlight a critical issue that demands thorough investigation. While various external factors have been previously examined, this study specifically focuses on internal learning barriers, which remain underexplored in the context of higher education in Papua. The aim of this research is to explore key internal constraints affecting students' academic engagement, including motivation, comprehension of course materials, learning strategies, and personal or social disruptions. Employing a qualitative case study approach and Miles and Huberman’s interactive data analysis model, data were collected through open-ended questionnaires and semi-structured interviews with Indigenous Papuan students. The findings reveal a complex interplay of internal challenges such as low motivation, self-doubt, ineffective learning approaches, and physical or psychological discomforts that hinder students’ learning processes. These internal barriers not only reduce classroom engagement but also negatively impact students’ perseverance in completing their studies. The study underscores the urgent need for contextually responsive and sustained institutional support, such as academic and psychosocial mentoring programs, to foster holistic success among Indigenous Papuan university students.
Enhancing Self-Regulated Learning and Conceptual Understanding through a TPACK-Based Physics E-Module on Momentum and Impulse Reski, Andi; Sari, Desy Kumala; Uskenat, Kristina; Jua, Selestina Kostaria
Jurnal Pendidikan Fisika Vol. 13 No. 3 (2025): PENDIDIKAN FISIKA
Publisher : Universitas Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26618/vwec8n65

Abstract

Physics learning frequently poses challenges for students due to the abstract nature of its concepts, particularly in topics such as momentum and impulse, which often result in misconceptions and low engagement. In response to this urgency, integrating technology through the Technological Pedagogical Content Knowledge (TPACK) framework has been advocated as an effective strategy to improve conceptual understanding and foster self-regulated learning (SRL). This study aimed to evaluate the effectiveness of a TPACK-based physics e-module in simultaneously enhancing students’ conceptual comprehension and SRL. Employing a quasi-experimental one-group pretest–posttest design, the research involved 30 students at SMA Negeri 2 Merauke, Indonesia. Instruments included a 20-item multiple-choice test on momentum and impulse concepts and a 20-item SRL questionnaire, both validated using Gregory’s content validity index (CVI > 0.80) and demonstrating strong reliability (Cronbach’s alpha > 0.80). Data analysis comprised descriptive statistics, normality testing, paired-sample t-tests, effect size calculations, and normalized gain (N-Gain) indices. The results indicated significant improvements in both domains: SRL scores increased from a mean of 66.50 to 82.50 (t = -12.24; p<0.001; d = 1.49; N-Gain = 0.449), while conceptual understanding improved from 46.30 to 73.00 (t = -18.21; p<0.001; d = 1.62; N-Gain = 0.497). These findings confirm that the e-module effectively addressed both cognitive and metacognitive aspects of learning. The novelty of this study lies in its dual focus on SRL and conceptual mastery within a single intervention, applied in a frontier educational context. The study contributes to physics education by providing empirical evidence of TPACK’s capacity to deliver scalable, context-sensitive innovations that enhance learning outcomes in diverse settings.
ANALISIS HASIL PEMBELAJARAN FISIKA PETERNAKAN BERBASIS PROBLEM BASED LEARNING (PBL) Jua, Selestina Kostaria; Yuliatun, Tutik
Jurnal Pendidikan Fisika Vol. 13 No. 1 (2024)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpf.v13i1.57187

Abstract

Menganalisis hasil dan kesulitan belajari mahasiswa selama proses perkuliahan, membantu pengajar dalam memahami karakter, kemampuan, dan pemahaman konsep fisika dasar mahasiswa. Jenis penelitian ini adalah penelitian deskriptif kualitatif yang menganalisis tugas, kuis, dan hasil tes mahasiswa. Instrumen yang digunakan adalah soal-soal esai yang diselesaikan oleh 17 mahasiswa aktif semester II jurusan peternakan. Jawaban mahasiswa dianalisis menggunakan langkah-langkah pemecahan masalah. Rata-rata hasil belajar mahasiswa mencapai nilai 62,67 dan dikategorikan cukup dengan persentase ketuntasan belajar klasikal sebesar 58,82%. Kesulitan-kesulitan belajar yang dialami oleh mahasiswa antara lain: 1) latar belakang pendidikan sekolah menengah atas bukan dari jurusan IPA atau eksata; 2) mahasiswa tidak memahami dan kurang menguasai konsep-konsep dasar fisika; 3) rasa takut karena pelajaran fisika banyak rumus dan pemecahan masalah; 4) tidak mengetahui peran ilmu fisika dalam bidang peternakan; 5) kesulitan menerapkan operasi hitung dasar; 6) malu bertanya dan bekerja sama; dan 7) kesiapan pengajar dan memilah konsep-konsep fisika yang sesuai dengan bidang ilmu peternakan.
ANALISIS TINGKAT KEMAMPUAN PEMECAHAN MASALAH PESERTA DIDIK KELAS X SMA PADA MATERI SUHU DAN KALOR Simbolon, Merta; Jua, Selestina Kostaria; Simatupang, Dimas Frananta
Jurnal Review Pendidikan dan Pengajaran Vol. 7 No. 2 (2024): Volume 7 No. 2 Tahun 2024
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jrpp.v7i2.26781

Abstract

Penelitian ini bertujuan untuk menganalisis tingkat kemampuan pemecahan masalah peserta didik SMA pada materi suhu dan kalor. Subjek penelitian ini adalah peserta didik kelas X salah satu SMA di kota Merauke yang berjumlah 30 orang. Metode yang digunakan dalam penelitian ini bersifat deskriptif dan data diperoleh dengan memberikan instrumen berupa tes kemampuan pemecahan masalah. Adapun instrumen yang digunakan adalah instrumen kemampuan pemecahan masalah berbasis multimodus representasi Rosengrant yang telah dikembangkan peneliti dan telah diuji validitas dan reliabilitasnya sehingga dinyatakan layak untuk digunakan sebagai instrumen tes. Selain itu, wawancara juga dilakukan terhadap guru sebagai data pendukung. Hasil yang diperoleh menunjukkan bahwa tingkat kemampuan pemecahan masalah peserta didik pada tahap 1 dan tahap 4 lebih baik daripada tahap 2 dan tahap 3.
Sinergi PBL dan Asistensi Pembelajaran Fisika: Upaya Akselerasi Kemampuan Pemecahan Masalah Siswa Simangunsong, Ika Trisni; Obina, Wilfrida Mayasti; Jua, Selestina Kostaria; Nababan, Evani Doana; Uskenat, Kristina; Tonggo, Fransisco Febryan
Jurnal Pengabdian UNDIKMA Vol. 6 No. 4 (2025): November
Publisher : LPPM Universitas Pendidikan Mandalika (UNDIKMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jpu.v6i4.18061

Abstract

This community service program aims to enhance students’ problem-solving abilities in physics through the synergy of Problem-Based Learning (PBL) and learning assistance at SMA YPPK Yoanes XXIII Merauke. The implementation methods included: (1) socialization sessions for parents and teachers; (2) training for grade X students; and (3) mentoring for grade X students through PBL and the use of measuring instruments. The instruments used were tests validated by expert teams, while questionnaires were administered to assess parents’ understanding and students’ responses. Data were analyzed using descriptive analysis techniques. The results of this community service activity indicate that: (1) 90% of parents understood the importance of providing their children with additional lessons or tutoring; (2) students’ physics problem-solving skills improved by 77%; and (3) 14 students recognized the need for additional tutoring in physics. Overall, the program successfully strengthened students’ problem-solving abilities and increased awareness among both students and parents regarding the importance of continuous learning support.
The Effect of Problem Based Learning Model Based on Problem Solving Strategy on Critical Thinking Ability Simbolon, Merta; Alfiani, Anisa; Jua, Selestina Kostaria
Tekno - Pedagogi : Jurnal Teknologi Pendidikan Vol. 15 No. 2 (2025): Tekno-Pedagogi
Publisher : Program Magister Teknologi Pendidikan Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/teknopedagogi.v15i2.51392

Abstract

Physics instruction that relies solely on conventional learning models is one of the factors contributing to students’ low critical thinking skills. This study aimed to examine the effect of the Problem-Based Learning (PBL) model based on a Problem-Solving Strategy on the critical thinking skills of eleventh-grade students at State Senior High School 2 Merauke in the topic of particle motion dynamics. This quantitative study employed a quasi-experimental research method using a pretest–posttest control group design. The sample consisted of class XI-4 as the experimental group and class XI-6 as the control group, selected through purposive sampling. The research procedure comprised three main stages: the preparatory stage (problem identification, literature review, development of instructional modules, and construction and validation of research instruments), the implementation stage (administration of the pretest, implementation of the intervention, and administration of the posttest), and the final stage (data analysis and formulation of conclusions). This study adopted Facione’s indicators of critical thinking skills, based on their relevance and alignment with the operational definition of critical thinking employed in this research. The results showed that the experimental class achieved a higher percentage than the control class, demonstrating that the PBL model based on a Problem-Solving Strategy had a greater impact on improving critical thinking skills compared to conventional learning models.
Pelatihan penulisan Karya Tulis Ilmiah (KTI) bagi peserta didik di SMP Kristen Kalam Kudus Merauke Selestina Kostaria Jua; Merta Simbolon; Andi Reski; Ika Trisni Simangunsong; Wilfrida Mayasti Obina
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 8, No 4 (2024): December
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v8i4.27365

Abstract

Abstrak Kegiatan pengabdian ini bertujuan untuk memberi sosialisasi dan pelatihan penulisan KTI kepada peserta didik tingkat Sekolah Menengah Pertama (SMP). Kegiatan pelatihan ini dilaksanakan di SMP Kristen Kalam Kudus Merauke dengan melibatkan 70 orang siswa dan didampingi oleh kepala sekolah serta beberapa orang guru. Metode yang digunakan dalam pelatihan ini adalah ceramah, diskusi, dan praktik langsung. Kegiatan ini dilaksanakan dalam beberapa tahap, yaitu survey perizinan, pengenalan KTI, pelatihan penulisan KTI, dan bedah contoh KTI. Hasil yang diperoleh dari kegiatan ini adalah peningkatan pemahaman dan minat peserta didik dalam menulis KTI. Hal ini terlihat dari antusisme peserta didik saat diskusi dan beberapa orang peserta didik yang sudah memiliki ide untuk KTI yang akan ditulisnya. Berdasarkan hasil yang diperoleh dari kegiatan pelatihan ini dapat diambil kesimpulan bahwa pelatihan penulisan KTI sangat penting dilakukan untuk memperkenalkan KTI dan meningkatkan minat peserta didik dalam menulis. Kata kunci: pengabdian; pelatihan; karya tulis ilmiah. Abstract This community service activity aims to provide outreach and training on writing scientific papers to junior high school students. The training was conducted at SMP Kristen Kalam Kudus Merauke, involving 70 students, accompanied by the school principal and several teachers. The methods used in this training included lectures, discussions, and hands-on practice. The activity was carried out in several stages: permission survey, introduction to scientific writing, training on writing scientific papers, and a review of a sample scientific paper. The results of this activity showed an increase in the students' understanding and interest in writing scientific papers. This was evident from the students' enthusiasm during discussions, with some already having ideas for the scientific papers they wanted to write. Based on the results of this training, it can be concluded that training on writing scientific papers is very important to introduce students to scientific writing and to foster their interest in writing. Keywords: devotion; training; scientific papers