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All Journal Hipotenusa: Journal of Research Mathematics Education (HJRME) International Journal of Hydrological and Environmental for Sustainability Islamic Journal of Integrated Science Education International Journal of Applied Mathematics, Sciences, and Technology for National Defense
Anghel, Cornelia Victoria
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Environmental Science Mathematics Physics Social Sciences Other

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Effectiveness of Deep Learning Basic Physics 1 Using A Multi-Representation Approach Based on Youtube Vidio With Infographic Results Malik, Fitroh Abdul; Nurfauziah, Rayya; Pratama, Siti Sofiah Tiska; Nurhayati, Tita; Hartini, Tri Isti; Anghel, Cornelia Victoria
Islamic Journal of Integrated Science Education (IJISE) Vol. 4 No. 1 (2025): March
Publisher : Program Studi Tadris IPA, Fakultas Tarbiyah (IAIN) Kediri, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30762/ijise.v4i1.4947

Abstract

The aim of this research is to create infographics based on YouTube videos and evaluate the effectiveness of basic Physics 1 lectures using the multiple representation (MR) approach as a deeper learning process for Uhamka physics education students. A multi-representation (MR) approach that uses representations such as verbal, images, graphics, mathematics and videos can help students gain mastery of Basic Physics 1 concepts, enhancing deeper learning by providing diverse and interactive teaching materials.  Infographics and YouTube videos as learning media for Basic Physics 1 provide a clear and interesting visual picture, making it easier for students to master theoretical physics concepts and relate them to applications in the real world. The results of this research are in the form of infographics which show that students are able to convey the results of basic physics 1 learning via YouTube as an in-depth learning medium using a multi-representation (MR).
Geothermal Waters from the Alpine Mountain Region, Europe: A Comprehensive Geochemical and Isotopic Analysis Anghel, Cornelia Victoria; Domańska, ‪Marta Michalska; Syväjärvi, Mikael
International Journal of Hydrological and Environmental for Sustainability Vol 3, No 3 (2024): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v3i3.533

Abstract

The Alpine region of Europe, which covers several countries including France, Switzerland, Italy, Austria and Germany, is characterised by its complex geology and significant geothermal potential. This research investigates the geochemical characteristics of geothermal water in the Alpine region, focusing on understanding the origin, evolution, and potential applications of these geothermal resources. Through comprehensive hydrochemical and isotopic analyses, we have identified key geochemical signatures that distinguish the various geothermal systems in the region. The results show that these geothermal waters are mainly influenced by deep magmatic processes, extensive water-rock interactions, and mixing of meteoric and magmatic fluids. Elevated concentrations of elements such as sodium (Na), lithium (Li), and chloride (Cl), as well as different stable isotopes, provide insights into the thermal and geochemical environments of geothermal reservoirs. Based on isotopic analysis oxygen (δ¹⁸O) and hydrogen (δ²H), the most of the geothermal water in the Alpine mountain region of Europe is of meteoric origin (derived from meteoric waters). The isotopic composition can reveal the mixing between meteoric and magmatic water. Intermediate values between GMWL and magmatic water compositions indicate such mixing, helping to understand the fluid dynamics within geothermal systems. This research underlines the importance of integrating geochemical studies in the exploration and management of geothermal resources in tectonically active regions such as the Alps.
Cadmium telluride (CdTe) thin-film photovoltaics: A sustainable energy solution to support national energy resilience Abdul, Annisa Mutiara Putri; Kusumadjati, Adhi; Aldhiantoro, Gustav Irgi; Dewi, Dinda Rahma; Baarik, Moh. Hisni Alfan; Anghel, Cornelia Victoria
International Journal of Applied Mathematics, Sciences, and Technology for National Defense Vol 3, No 2 (2025): International Journal of Applied Mathematics, Sciences, and Technology for Natio
Publisher : FoundAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/app.sci.def.v3i2.831

Abstract

Cadmium Telluride (CdTe) is one of the most promising materials in thin-film solar cell technology; however, its application faces challenges related to efficiency limitations and environmental risks. This study aims to evaluate the performance characteristics, environmental impact, and sustainability potential of CdTe in Solar Power Plant, known in Indonesia as Pembangkit Listrik Tenaga Surya (PLTS) applications. A systematic literature review was conducted, analyzing more than 40 scientific articles and industrial reports published over the last 15 years, covering efficiency, material availability, recycling strategies, and lifecycle assessments. The results indicate that commercial CdTe modules achieve efficiencies between 7–10%, while laboratory devices exceed 22%. CdTe demonstrates superior performance under high temperatures and low-light conditions, but concerns remain regarding cadmium toxicity and the limited availability of tellurium. The study concludes that CdTe holds significant potential as a cost-effective and efficient solar technology, provided that robust recycling systems and responsible material sourcing practices are implemented.
STUDENTS' MATHEMATICAL COMMUNICATION INSTRUMENTS: A GENDER PERSPECTIVE IN MATHEMATICS LEARNING Mardiana, Mardiana; Putra, Fredi Ganda; Anghel, Cornelia Victoria
Hipotenusa Journal of Research Mathematics Education (HJRME) Vol 8, No 2 (2025): Hipotenusa Journal of Research Mathematics Education (HJRME)
Publisher : Universitas Muhammadiyah Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36269/hjrme.v8i2.3781

Abstract

Evaluating students' mathematical communication ability is crucial for understanding their ability to convey mathematical ideas logically, precisely, and in a structured manner. A good evaluation instrument is the primary tool for measuring this aspect objectively and purposefully. This research is motivated by the low mathematical literacy achievement of Indonesian students in the 2018 PISA survey, which indicates weak mathematical communication ability. This study aims to analyze students' mathematical communication ability from a gender perspective. This study used a quantitative method with a survey design. The survey type used was a cross-sectional survey design. The results showed that female students had higher average scores than male students, but the ANOVA test produced a significance value of 0.621 (> 0.05), indicating no significant difference. This finding shows that mathematical communication ability is more influenced by individual factors. The implication is that teachers need to use adaptive learning approaches and evaluation instruments that address individual student needs.
Co-Authors Abdul, Annisa Mutiara Putri Aldhiantoro, Gustav Irgi Baarik, Moh. Hisni Alfan Dewi, Dinda Rahma Domańska, ‪Marta Michalska Fredi Ganda Putra Kusumadjati, Adhi Malik, Fitroh Abdul Mardiana Mardiana Nurfauziah, Rayya Nurhayati, Tita Pratama, Siti Sofiah Tiska Syväjärvi, Mikael Tri Isti Hartini, Tri Isti