Based on KKP data, nile tilapia production is highly increasing from 2015 – 2018. To generate high production of nile tilapia, intensive culture system is needed. The latter indicated with high density stock and feed amount, which lead to high accumulation of organic waste. Those accumulation of organic waste considered harmful towards fish commodity due to contained ammonia and nitrite which both of them categorized as toxic. The solution for the prior problem is by applying aquaponic system along with the addition of Nitrosomonas and Nitrobacter probiotic to support nitrification process. Nitrification process described as decreasing process of ammonia and nitrite by oxidizing them into nitrate. The effective dosage of the probiotic has yet to be known, so this study aim to figure out whether the addition of those probiotic with certain dosage can decrease nitrite and increase nitrate. This study uses Rancang Acak Lengkap (RAL) with 5 treatments repeated 4 times. Nitrite and nitrate data analyzed by ANOVA. The result showed the addition of Nitrosomonas and Nitrobacter probiotic decrease nitrite and increase nitrate with 1,5 mg/L as the most effective dosage. Prior dosage decrease nitrite level into 0,0672 ± 0,0013 mg/L and increase nitrate level into 3,936 ± 0,1175 mg/L
This study aims to test the application of e-learning using edmodo media in learning physics based on character values to improve student learning outcomes in work and energy materials. This type of research is an experiment, using the One Group Pretest-Posttest Design design. The instrument used in this study was a pretest and posttest questions consisting of 12 question numbers to test the improvement of student learning outcomes using e-learning using edmodo media. The pretest value data normality test using the Kolmogorov-Smirnov test resulted in 0.035, and for the posttest value obtained 0.457. The results showed an increase in student learning outcomes with an average gain value of 0.82 which is included in the high criteria. The results of the data hypothesis analysis were obtained from the pretest and posttest values based on the output "statistical test" known to Asymp. Sig (2-tailed) is 0.00. (0.05). Based on the results of the hypothesis test, it can be concluded that there is an increase in student learning outcomes by using e-learning using edmodo media in physics learning based on character values on business and energy materials.
Study of groundwater types using the Vertical Electrical Sounding (VES) method in 'Martani Field’ Ngemplak District of Yogyakarta was done by carrying out eight measurement points to look for groundwater potential. This area is an area on the southern slopes of Mount Merapi which is included in the Yogyakarta Groundwater Basin. The type of lithology is identified based on the measurement of its resistivity value so that there are several types of lithology, namely Breccia (110-670 Ωm), Clay (1.99-10.12 Ωm), Sandstones (17.06-56.82 Ωm) and andesite lava (688-1657 Ωm). The bottom of the aquifer in this basin is composed of rock formations that are impermeable or semi impermeable which are non-aquifer, namely by Breccias, Clay and Andesite Lava. The existence of sandstones that act as aquifers is found near the surface at a depth of <25 m and at a depth of about 60-100 m below the surface so that it is divided into two categories, namely shallow groundwater and deep groundwater.
This study aims to determine the influence of the Inquiry-Based Learning model on students' scientific ability in Rotational Dynamics of a Rigid Bodies. This influence is seen from whether or not students can achieve the criteria of completeness by mastering three PISA (Program for International Student Assessment) indicators in 10 items on the test consisting of two questions to identify scientific problems, five question to explain phenomena scientifically, and three questions to interpret data and scientific evidence. The research method applied is the experimental method and uses the One Group Pretest-Posttest Design as a research design involving 4 classes, where 1 class acts as the experimental class and 3 classes as the replication class. Based on the statistical results of the t-test to test the research hypothesis, the t-count value for each sample class is greater than the t-table value. This shows that the use of the Inquiry-Based Learning learning model has an effect on students' scientific literacy abilities in the rotational dynamics of a rigid bodies
ABSTRAKPenelitian ini dilakukan di SMA Negeri 1 kabila Tahun Ajaran 2021/2022 pada kelas X IPA dan bertujuan untuk mengetahui pengaruh positif yang signifikan dengan menggunakan model pembelajaran inkuiri terbimbing berbantuan video dengan implementasi blended learning terhadap hasil belajar siswa pada konsep gerak parabola di SMA. Penelitian ini dilakukan pada masa pandemi Covid-19 dengan proses pembelajaran campuran (blended learning). Penelitian ini menggunakan metode eksperimen. Penelitian ini menggunakan desain One-Group Pretest-Posttest Design. Pada desain ini akan diberikan perlakuan setelah diberi perlakuan (posttest) dengan nilai ketuntasan siswa (KKM). Teknik analisis data yang digunakan yaitu uji normalitas data, uji hipotesis, uji N-Gain, dan effect size. Teknik pengambilan sampel didalam penelitian ini menggunakan teknik sampling kelompok dan dilakukan secara acak. Instrumen penelitian yang digunakan berupa soal essay. Berdasarkan hasil pengujian hipotesis diketahui harga thitung ≥ ttabel yaitu 6.49 ≥ 2.03, maka dapat disimpulkan bahwa terdapat pengaruh positif yang signifikan dari perlakuan yang diberikan (posttest) dengan nilai ketuntasan siswa (KKM). berdasarkan analisis dari N-Gain dan effect size, diperoleh nilai N-Gain 0.60 dengan kategori sedang. Untuk nilai effect size yaitu 1.90 dengan interpretasi strong effect. Hal ini menunjukkan bahwa terdapat konsistensi dari perlakuan yang diberikan (posttest) terhadap hasil belajar siswa. Kata kunci: inkuiri terbimbing; video; hasil belajar; blended learning. ABSTRACTThis research was conducted at SMA Negeri 1 Kabila for the Academic Year 2021/2022 in class X Science and aims to determine the significant positive effect of using a video-assisted guided inquiry model with the implementation of blended learning on student learning outcomes on the concept of parabolic motion in high school. During the covid-19 pandemic with a blended learning process. This research uses an experimental method. This study uses the One-Group Pretest-Posttest Design. In this design, treatment will bi given after being treatment (Posttest) with student completeness scores (KKM). The data analysis technique used is data normality test, hypothesis testing, N-gain test, and effect size. The sampling technique in this study used group sampling technique and was carried out randomly. The research instrumen used was essay questions. Based on the results of hypothesis testing, it is known that the price of tcount ≥ ttables is 6.49 ≥ 2.03, it can be concluded that there is a significant positive effect of the treatment given (posttest) with the student’s completeness score (KKM). Based on the analysis of N-gain and effect size, the N-gain value of 0.60 is obtained in the medium category. The effect size value is 1.90 with a strong effect interpretation. This shows that there is consistency in the treatment given to student learning outcomes. Keywords: guided inquiry; video; learning outcomes; blended learning.
The purpose of this study was to describe the quality of physics learning tools using the Problem-Based Learning model with the Contextual Teaching and Learning approach on the material of elasticity and Hooke's law. The research was conducted at Muhammadiyah Batudaa High School, and the research sample used was class XI IPA1 using simple random sampling technique. This development research uses Research and Development (R&D) research with the ADDIE development model developed by Reiser and Mollenda which consists of the Analysis, Design, Development, Implementation and Evaluation stages. The results of the study show that the validation of the entire learning device is stated to be very valid. The practicality of learning devices is determined by the average percentage of the implementation of learning carried out during two meetings reaching 97.61% with very good criteria, then for teacher and student responses through questionnaires give positive responses. The effectiveness of learning devices is seen through student activity data which obtains an average percentage of 90.30% obtained very good criteria and student learning outcomes data on elasticity and Hooke's law show an increase in the N-gain value of 0.74 included in the high N-gain criteria. This study concludes that physics learning tools that use the Problem-Based Learning model with a Contextual Teaching and Learning approach on elasticity and Hooke's law are included in the valid, practical and effective criteria to be applied in the learning process in class.
This study aims to determine the effect of crossword puzzle learning media with discovery learning models on student learning outcomes on the concept of sound waves. This research is a quasi-experimental type of research using one class (one samples) only the experimental class using the One Group pretest posttest design. In this study, learning was conducted three times online with the discovery learning model. The instrument used in data collection is an essay test of learning outcomes. The method used to analyze the data is descriptive analysis technique, namely normality test, hypothesis testing with a significance level of 5%. Based on hypothesis testing using parametric statistics t test obtained tCalculate (5.789 > ttabel (2.024) with a significant level = 0.05. where hypothesis one (H_1) is accepted. This shows that there are differences in student learning outcomes before and after learning using learning media crossword puzzle with the discovery learning model. This result is also shown from the increase in student learning outcomes on the posttest test which is higher than in the pretest test with an average value of 76.03% and 65.71%. Thus the use of crossword puzzle media with the discovery learning model affects the results student learning
Learning amid the COVID-19 pandemic underwent significant changes, the implementation of learning which was initially carried out face-to-face at school, became learning from home/belajar dari rumah (BDR). On the other hand, the strategy should make students think at a higher level. Based on observations, it was found that students were still very lacking in understanding physics learning and learning methods that seemed monotonous and boring. So to overcome these problems, the application of a problem based learning model is carried out. This study aims to determine the effect of applying the problem-based learning model in online learning on student learning outcomes in heat material. This type of research is included in the type of quantitative research. The research method used is experimental. Subjects in the study were students of SMP Negeri 6 Gorontalo City in class VII. It consisted of three (3) classes, namely the experimental class, replication 1, and replication 2. The instrument used in this study was a written test (essay) consisting of pre-test and post-test. test. The process of collecting data through written tests in the form of pretest and posttest to see the consistency of the influence of student learning outcomes. The data analysis technique used is the normalized gain test (n-gain), the normality test of the hypothesis test data. The results show that learning by applying the Problem Based Learning model can affect student learning outcomes. This is shown through the hypothesis testing criteria where for the experimental class tcount 7.304 is greater than ttable 2,035, for replication class 1 tcount 8,266 the value is more dominant than ttable 2,037, and for replication class 2 tcount 9,658 is greater than ttable 2,037 so it can be said that the test the hypothesis tcount is more dominant than ttable, this can be interpreted that the Problem Based Learning model is quite influential in student learning outcomes.
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