Lensa: Jurnal Kependidikan Fisika

Journal Information
ISSN / EISSN : 2338-4417 / 2686-0937
Current Publisher: LPPM IKIP Mataram (10.33394)
Total articles ≅ 34
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Dian Fadila, Suliyanah Suliyanah, Utama Alan Deta
Lensa: Jurnal Kependidikan Fisika, Volume 8, pp 39-47; doi:10.33394/j-lkf.v8i2.3195

Abstract:
Scientific literacy is a person's ability to understand science, communicate science, and apply scientific knowledge to solve problems so that they have high attitudes and sensitivity to themselves and their environment in making decisions based on scientific considerations. This study aims to determine the understanding of high school students regarding scientific literacy and to determine the effect of high school students' interest in learning on science literacy learning outcomes. This study involved 201 high school students in Surabaya, Sidoarjo and Gresik. This study uses a mixed-method, namely, by using a quantitative approach and a qualitative approach. Quantitative analysis was perform using regression and correlation tests. The qualitative research obtains from questionnaires and interviews with students. The answers from students categorized into four levels, namely a score of 0 (did not answer the questions), score 1 (responded to questions but not quite right), score 2 (answered correctly) and score 3 (answered correctly) with exact categories). From the research results, it can conclude that students' understanding of scientific literacy is still low. The regression test where the significance value is 0.095> 0.05, which means that there is no influence of students' interest in learning on the results of students' scientific literacy skills, while the correlation test shows that the correlation between students' interests and the effects of scientific literacy skills (r) is 0.118. This indicates that there is a shallow relationship between students 'interest in learning and the consequences of high school students' scientific literacy skills. This research recommended that students can improve their understanding of scientific literacy by getting used to reading scientific literacy before learning begins so that students' interest in reading scientific phenomena increases.
E. Erika, Edwin Kurniawan, Azizah Hanum
Lensa: Jurnal Kependidikan Fisika, Volume 8, pp 70-75; doi:10.33394/j-lkf.v8i2.2952

Abstract:
The purpose of this research is to look at the description of scientific attitudes possessed by students at SMPN 17 jambi city based on indicators of adoption of scientific attitudes and indicators of interest in increasing the time of science learning. This research is a quantitative study in which researchers use survey methods with data collection techniques using a questionnaire. The results of the 2 attitude indicators discussed in this study are indicators of the adoption of scientific attitudes of 62.5% of students categorized as good. While the interest in increasing science learning time by 66.4% of students is of sufficient category. Based on the results of research that has been conducted it can be concluded that students have adopted a good scientific attitude and have sufficient interest to increase their science learning time.
Mashelin Wulandari, Ricky Purnama Wirayuda, Febritia Aldila, Retno Wulandari
Lensa: Jurnal Kependidikan Fisika, Volume 8, pp 93-103; doi:10.33394/j-lkf.v8i2.3206

Abstract:
Science Process Skills have an important function in the process of student curiosity and scholarship, so it is necessary to do a description of students' science process skills. This study aims to describe students' integrated science process skills on friction material on a flat plane at SMPN 9 Muaro Jambi. The observed science process skills consist of ten observation indicators, namely experimental analysis, planning experiments, conducting experiments, describing the relationship between variables, defining variables operationally, making data tables, obtaining and processing data, making hypotheses, identifying variables and making graphs. This type of research is qualitative research with descriptive type. The research subjects were students of class VIII at SMP Negeri 9 Muaro Jambi which consisted of class VIII D and VIII E. The sampling technique was total sampling where the total sample was 40 students. While the data collection technique uses observation sheets that have been validated by a team of experts. The data that has been obtained were analyzed using descriptive statistical techniques with the help of IBM SPSS statistics software. The results of the research on students' mastery of integrated science process skills in the friction practicum on the flat plane were classified into the good category with a percentage of 57.5%. This means that students have good science process skills, because most students are skilled at doing practicum based on experimental indicators. The conclusion of this study shows that the integrated science process skills possessed by students are categorized as good.
Lalu Muhamad Alfian Ramdani, Sukainil Ahzan, Dwi Sabda Budi Prasetya
Lensa: Jurnal Kependidikan Fisika, Volume 8, pp 85-92; doi:10.33394/j-lkf.v8i2.2786

Abstract:
This study aimed to identify the effects of variety and composition of the adhesive used to the physical properties and the rate of combustion hyacinth biobriquettes. The physical properties referred to are water content, density and heating value. This research is an experimental study with a literacy study conducted in 3 stages, preparing tools and materials, making biobriquettes, and testing biobriquettes. The main ingredients used in the manufacture of biobriquettes are water hyacinth which is obtained at the Batujai Dam, Central Lombok Regency and the adhesive materials used are wheat flour, tapioca flour and cement. The method used to test the water content and density of the biobriquette was oven, while the calorific value and the rate of combustion were by heating water from the biobriquette combustion. The results showed that the biobriquette water content ranged from 5.138% - 13.953%, density 0.412 g/cm3 - 0.513 g/cm3, calorific value 2984.520 cal - 4476.780 cal, and combustion rate 0.029543 g/s - 0.042431 g/s. Based on the test results, it is known that the addition of adhesive material causes the water content, density, and combustion rate of the biobriquette to increase but the calorific value tends to decrease.
Ni Nyoman Sri Putu Verawati
Lensa: Jurnal Kependidikan Fisika, Volume 8, pp 48-54; doi:10.33394/j-lkf.v8i2.3215

Abstract:
Polymer films have become a material for research recently because polymer films have an important role in the application of basic sciences. The polymer film has good mechanical, electrical and optical properties to be used in many applications, one of which is a polymer film that has the potential to be irradiated into a dosimeter. Therefore, modification of polymer film one of which is gamma ray irradiation is important to be further explored. This study aims to explore the effect of gamma ray irradiation on the optical absorption of polymer film blend PVA (polyvinyl alcohol) -trichloroacetid acid (TCA) -methylene blue (MB). Preparation of polymer films by chemical processes using the solvent-casting method. Each polymer film was irradiated with gamma rays with radiation doses ranging from 0 kGy to 14 kGy. Optical absorption was measured using a UV-VIS spectrophotometer with a range of wavelengths ranging from 200 nm to 700 nm. The results showed that three optical absorption peaks were formed on the polymer film PVA-TCA-MB due to gamma ray radiation at wavelengths of 360 nm, 440 nm, and 560 nm. Gamma ray radiation has an effect on optical absorption, where the optical absorption value of polymer film for the first peak (360 nm) and second peak (440 nm) decreased along with the increase in the dose of gamma ray irradiation, but for the third peak (560 nm) there was an increase in the optical absorption value along with an increase in the dose of gamma ray irradiation. The results of further studies are described in this article.
Sari Hidayani, J. Jamaluddin, Agus Ramdani
Lensa: Jurnal Kependidikan Fisika, Volume 8, pp 63-69; doi:10.33394/j-lkf.v8i2.3285

Abstract:
Efforts to develop critical thinking skills are still educational goals which are expected to improve learning outcomes which have an impact on the performance and quality of students. It is important to measure critical thinking skills so that the right techniques can be found to develop and improve these thinking skills. This study aims to describe critical thinking skills and their relationship with science learning outcomes of SMPN students in the city of Mataram. This type of research is a quantitative descriptive study with a sample of 418 Grade VII students and 435 Grade VIII students who were determined using purvosive techniques. Collecting data using test instruments that have been validated by experts and tested for reliability. The results showed that the critical thinking skills profile of the students of SMPN Mataram City was classified as moderate, with an average score of 68.83 for grade seven (VII) and 70.69 for grade eight (VIII). So it can be said that the relationship between critical thinking skills and science learning outcomes is very low as indicated by the R square value. R square for class VII is 0.074, which means that critical thinking skills have an effect of 7% on science learning outcomes. R square for class VII is 0.097, which means that critical thinking skills have an effect of 9% on science learning outcomes. The critical thinking skills of SMPN students in Mataram City needs to be improved by improving the learning process and learning evaluation tools.
Lintang Pratama, Dwi Pangga, Dwi Sabda Budi Prasetya
Lensa: Jurnal Kependidikan Fisika, Volume 8, pp 55-62; doi:10.33394/j-lkf.v8i2.2758

Abstract:
This study is a research on water hyacinth-based briquettes which shows the calorific value of each form of briquettes. The purpose of this study was to analyze the quality of water hyacinth briquettes with variations in pressure and pellet geometry. The quality analyzed includes moisture content and calorific value. The method of making briquettes starts from charcoal, pounding, then mixing with tapioca starch adhesive. The composition of the mixture used is 90% water hyacinth charcoal with 10% tapioca starch adhesive. 4 geometric variations are used, namely, solid box, hollow box, solid tube and hollow tube with 3 pressure variations, namely, 10 PSI, 20 PSI and 30 PSI. Test results and analysis,briquettes at a pressure of 20 PSI produces a calorific value range of 91.15 - 150.14 cal / gram. The resulting calorific value is higher than the briquettes at a pressure of 10 PSI and 30 PSI with a heating value range of 93.84 - 148.79 cal / gram and 89.81 - 135.39 cal / gram. Hollow briquettes produce a calorific value range of 107.24 - 150.14 cal / gram higher than solid geometric briquettes which produce a heating value range of 89.81 - 148.79 cal / gram. So that the contribution of the results of this research is that the community makes briquettes with shape and pressure with good results shown in this study.
Nadia Natalia Simamora, Wita Ardina Putri, Muhammad Iqbal, Auliya Ramadhanti, Endah Febri Setiya Rini
Lensa: Jurnal Kependidikan Fisika, Volume 8, pp 76-84; doi:10.33394/j-lkf.v8i2.3175

Abstract:
Attitude is a form of one's perception of an object which is depicted through the expression of accepting, rejecting, or ignoring. Discipline attitude is the accuracy in following the rules of the game that has been agreed upon. The purpose of this study was to describe the disciplinary attitudes of student learning towards four indicators in SMP Negeri 16 Jambi City. The research method uses descriptive research. The instrument used was a learning discipline attitude questionnaire. The sample in the study amounted to 69 students. The sampling technique in this study was total sampling. The research instrument used was a learning discipline attitude questionnaire. The questionnaire data were analyzed using descriptive statistics with the help of SPSS 21. The results showed that the learning discipline attitude of dominant students in the category always consisted of 2 indicators, namely obeying and obeying school rules and good attention when learning in class, and also The attitude of student learning discipline is dominant in the frequent category which consists of 2 indicators, namely managing study time at home diligently and regularly studying and doing assignments. Based on the results of the study, it was found that students' learning discipline attitude at SMP Negeri 16 Jambi City in 4 indicators had a positive attitude in the always and often category.
, Nanda Faizil, Akrajas Ali Umar, Siti Khatijah Md Saad
Lensa: Jurnal Kependidikan Fisika, Volume 8, pp 1-8; doi:10.33394/j-lkf.v8i1.2728

Abstract:
The use of Titanium dioxide (TiO2) semiconductors in Dye-Sensitized Solar Cells (DSSC) devices have been extensively studied and synthesized with various techniques to obtain optimal performance. The TiO2 semiconductors with optimal performance are influenced by the growth method, the time of growth, the shape of the microstructure, and the optical properties. In this study, it was reported about the effect of silver nanoparticles (AgNO3) doping onto TiO2 semiconductors on their microstructure, reflectance, and efficiency of the DSSC device. The synthesis of TiO2 was carried out using liquid phase deposition (LPD) and immersed into an AgNO3 solution with a variation of time namely 0.5 h, 1 h, 2 h, 4 h, and 6 h. The entire TiO2 + AgNO3 sample, then used as a photoanode on DSSC with plastisol as a counter electrode. Characterization of microstructure, reflectance, and DSSC performance was carried out by using field emission scanning electron microscopy (FESEM), Uv-Vis Spectrophotometer, and Gamry Instrument, respectively. The FESEM results show that AgNO3 has successfully grown on the ITO substrate in a spherical shape with an average particle diameter ranging from 1.52-2.29 μm. From observations using the Uv-Vis Spectrophotometer, obtained the energy band gap values ranged from 0.22 to 2.27 eV. The best results of DSSC device efficiency, with TiO2+AgNO3/Dye/Plastisol structure, have resulted in the Voc of 0.694 V, current density (Jsc) of 0,943 mA/cm2and fill factor (FF) of 43,50% which is obtained at sample 1.
I Wayan Gede Sutirta, Muslimin Muslimin, Marungkil Pasaribu
Lensa: Jurnal Kependidikan Fisika, Volume 8, pp 9-16; doi:10.33394/j-lkf.v8i1.2682

Abstract:
This research is a descriptive study with a qualitative approach, which aims to describe the ability of junior high school students to solve physics problems in various forms of problem representation. The subjects in this study were the IX grade junior high school students in six Palu city schools. Respondents for interviews in the study amounted to 4 people for each form of problem representation, with the criteria of students who answered right, students who answered ± 50% correct, students who answered incorrectly, and who did not answer. The instrument used was a test of problem solving skills and interviews. The data obtained were analyzed qualitatively including data reduction, presenting data and verification while descriptive analysis was performed by calculating the total score, calculating the percentage and categorizing problem solving abilities. The results obtained by the average ability of junior high school students to solve physics problems in various forms of problem representation 21.86% (less category), with the percentage of each form of representation ie verbal representation 36.09% (less category), image/picture representation 23.78% (less category), diagram representation 19.47% (poor category) and graphic representation 8.10% (poor category).
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