Mechanical energy is one of the topics of learning physics in high school that is related to concepts and mathematical equations. Modellus is a computer application designed to explore mathematical models based on functions that are represented in the form of animations, graphics, and tables that are useful for focusing learning activities on understanding student physics concepts. In this study describes computational modelling activities using Modellus software and carried out the Modellus quality testing phase as a medium of physics learning to improve understanding of students’ concepts on the topic of mechanical energy. Based on the data obtained, Modellus is included in the “very good” category used in physics learning especially on the topic of mechanical energy and critical thinking skills students obtain an average score of 65,45 in the “good” category using Modellus.
Sodium lithium zinc-lead borate glasses co-activated with Sm3+ ion were prepared by melt and quenching method. The glass composition regarding to (65 – x)B2O3 : 5ZnO : 5Li2O : 15 Na2O : 10PbO: x Sm2O3 chemical formula is synthesized with x = 0.0; 0.05; 0.1; 0.5; 1.0; 2.0 and 4.0 mol.%. These samples which are labeled as Sm_0.0; Sm_0.05; Sm_0.1; Sm_0.5; Sm_1.0; Sm_2.0 and Sm_4.0 respectively. The structural characteristic was investigated and analyzed by using the FTIR and XRD. Moreover, physics properties such as molar weight, density, molar volume, refractive index, etc were calculated with the standard equations. From the measurement and calculation, the density was found to increase slightly by showing linear trends with Sm2O3 content in the glass network structure. It was happened due to the compactness level of glass structure and geometrical arrangement have modified in the glass network. The molar volume of the glass samples also gradually increases from 28.185 cm3/mol to 29.613 cm3/mol. From the FTIR and XRD analysis can be confirmed that the present samples are amorphous without the presence of the crystalline peak.
Fluoro-borophosphate glass containing Natrium Fluoride (NaF) doped with Samarium ion 1 mol% concentration. The glass compositions based on 49P2O5-5B2O3-15ZnO-15Li2O-15NaF-1Sm2O3 are prepared by melting and quenched technique. The optical and photoluminescence were obtained from the UV-Vis-NIR spectrophotometer and spectrofluorophotometer. The ground state 6H5/2 as the start transition in the absorption spectrum and the Judd-Ofelt intensity parameters (2, 4, and 6) were determined. The emission spectra of borophosphate glass with NaF were recorded at an excitation of 401 nm which gave four peaks namely 6H5/2, 6H7/2, 6H9/2, and 6H11/2..
Article: The effect of sodium fluoride in lithium fluorophosphate (LFP) glasses doped with Nd2O3 ion Journal: Integrated Ferroelectrics GINF Article ID: GINF 2035600 Dear Juniar Hutahaean,We are delighted that you have chosen to publish your article in Integrated Ferroelectrics. I will be your Production Editor and will work with you to oversee the production of your article through to publication. My contact details are given at the end of this email.
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