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Lensa: Jurnal Kependidikan Fisika
Published by Universitas Pendidikan Mandalika
ISSN : 23384417     EISSN : 26860937     DOI : https://doi.org/10.33394/j-lkf
Core Subject : Science, Education, Social, Engineering,
Astronomy Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Physics
Lensa: Jurnal Kependidikan Fisika (J-LKF) published by the Physics Education Study Program UNDIKMA. J-LKF publishes every 6 months including the study of science and education in the field of physics specifically and natural and applied sciences in general.
Arjuna Subject : Ilmu Sosial - Pendidikan
Articles 5 Documents
 1 
Search results for , issue "Vol 7, No 2: December 2019" : 5 Documents clear
Graphene-Au Film Synthesized from GrO in Au-Aquaeus Solution as Counter Electrode For DSSC Application Marjoni Imamora Ali Umar
Lensa: Jurnal Kependidikan Fisika Vol 7, No 2: December 2019
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (648.048 KB) | DOI: 10.33394/j-lkf.v7i2.2644

Abstract

The study on the optical, electrical properties of multilayer graphene (MLG) obtained by thermal-reduction of graphene oxide (GrO) which was synthesized directly by mixing graphite oxide (GO) flake in 0.005, 0.01, 0.015, and 0.02 M of Au aqueous solution has been successfully performed. The resultant  GrO was subjected to an annealing temperature of 200°C, 400°C, 500°C for 1h to obtain MLG, and G-Au2x, G-Au4x, and G-Au5x (x=.0.005, 0.01, 0.015, and 0.02). The resultant samples were then characterized using FESEM, UV-VIS, four-point probe measurements to study its morphology, optical, and electrical properties. The transmission G-Au increase and its sheet resistant decrease as an increase of annealing temperature. Besides, the annealing treatment was then achieved of its microstructure which is expected may be used as a counter electrode in solar cell applications. The best DSSC devices with Quartz/FTO/ZnO Nanorods/Dye/G-Au50.01/Quartz structures have resulted in current-density, Voc, and solar cell performance of 0.1 mA/cm2, 0.42 V, and 0.01%, respectively.
The Effect of the Inquiry Learning Model on Students’ Metacognition Awareness Samsun Hidayat; Muhammad Asy'ari; Muhali Muhali; Roniati Sukaisih
Lensa: Jurnal Kependidikan Fisika Vol 7, No 2: December 2019
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (478.636 KB) | DOI: 10.33394/j-lkf.v7i2.2049

Abstract

This study aims to determine the effect of inquiry learning models on the students’ metacognition awareness in senior high school. Metacognition awareness in this study consists of eight components, namely (1) declarative knowledge, (2) procedural knowledge, (3) conditional knowledge, (4) planning, (5) information management system, (6) monitoring, (7) evaluation, and (8) debugging. This research is a quasi-experimental research with one group pretest-posttest design. The sample in this study were 25 students of science in Madrasah Aliyah Negeri 3 Lombok Tengah chosen using the saturated sample technique. Metacognition Awerness Inventory (MAI) is used to collect metacognition awareness data of students who are analyzed using paired t-test and Wilcoxon test samples. The results showed that students' metacognition awareness for all indicators was stated to increase (p <0.05) after learning using inquiry learning models. Based on these results, it can be concluded that the inquiry learning model influences the metacognition awareness of secondary school students.
The Effect of the Giving Question Getting Answers Model through Experimental Methods on Physics Motivation and Learning Outcomes Farizah Yulianti; Sutrio Sutrio; Hairunisyah Sahidu
Lensa: Jurnal Kependidikan Fisika Vol 7, No 2: December 2019
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (711.235 KB) | DOI: 10.33394/j-lkf.v7i2.2199

Abstract

The aim of this research is to know the impact of the applying Giving Question Getting Answers model with experimental methods toward the learning motivation and result of physics learning. The type of research used was quasi-experimental with posttest only control group design. The population was all student of grade XI in senior high school 1 of  Labuapi. The sampling technique used saturation sampling, while the sample are class XI MIA 1 as the experimental 1 class, and the XI MIA 2 as experimental 2 class. Experimental 1 class was treated with giving question getting answers learning model with experimental methods and experimental 2 class was treated with giving question getting answers learning model without experimental methods. The instrument of motivation learning was used motivation questionnaire and instrument the result of physics learning used multiple choice test. The research hypothesis was tested using Manova-test, data analysis shows that Sig. <0,05 which mean that H0 was rejected and Ha accepted. Thus, it can be concluded that there are effect of Giving Question Getting Answers model with experimental methods on student’s motivation and physics learning result.
Time Stirring Effect of Chitosan from Shrimp Shells as Gold Absorbent Dwi Sabda Budi Prasetya; Sukainil Ahzan
Lensa: Jurnal Kependidikan Fisika Vol 7, No 2: December 2019
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (717.822 KB) | DOI: 10.33394/j-lkf.v7i2.2685

Abstract

This study aims to analyze the effect of chitosan stirring time from shrimp shells as gold absorber. Experimental research was conducted in this study, where the manufacture of chitosan from shrimp shells began with demineralization (mineral removal) using 1.5 M HCl, deproteination (protein removal) using 3.5% NaOH and deacetylation (acetyl removal) using 60% HCl. The chitosan formed was weighed 0.1 gram (as many as five samples) and then stirred in a 10 ppm Au solution, with a stirring time of 0, 10, 20, 30, and 40 minutes, and its absorption ability to gold was analyzed using AAS (Atomic Absorbsion Spectroscopy) and obtained percentage of absorption respectively 24.79%, 50.89%, 45.64%, 40.52% and 37.87%. From the results of the study, it was found that there was an effect of chitosan stirring time from shrimp shells as gold absorber and the highest absorption at 10 minute stirring was 50.89%.
Effectiveness of Problem Based Learning Model with Worksheet Assisted on Students' Critical Thinking Ability Satutik Rahayu; Ni Nyoman Sri Putu Verawati; Andi Fatimatul Islamiah
Lensa: Jurnal Kependidikan Fisika Vol 7, No 2: December 2019
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (642.071 KB) | DOI: 10.33394/j-lkf.v7i2.2686

Abstract

This research aims to know the effectiveness of the learning problem based learning model assisted worksheet for the critical thinking ability of physics students of grade X SMAN 1 Lingsar. This was an experiments research that using design research Posttest-Only Control group Design. The population in this research were the whole grade X SMA Negeri 1 Lingsar in academics year 2016/2017. Sampling taken with using cluster random sampling technique with the students of class X MIA.A as experiment class and X MIA.D as control class. Research hypothesis was analysis with the t-test for one party (the party right). Based on the hypothesis test results obtained tcount> ttable at significance level of 5%, then it can be inferred that the model of learning problem based learning assisted work sheet effective for critical thinking ability of physics students SMAN 1 Lingsar.

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