Implementation using a written test and answering in writing requires a lot of time in the correction process, so that in submitting the test results you have to wait quite a long time, the risk of fraud is high. So the product is developed as an alternative media for this problem besides the existing internet media. This study developed a website-based physics test instrument product and obtained information about its feasibility. Products are used in physics learning in high schools as a system that facilitates the process of implementing tests and their assessments. This research design is 4-D development. The results of the validators' assessment of 2 material experts and 2 media experts with CVR, namely 1 and CVI, namely 0.1, were categorized as very good and the feasibility percentage was 89%. as well as a limited trial of 40 respondents, namely 2 teachers and 38 students in one of the public Madrasah Aliyah at Jepara city stated that they agreed with the calculation of the CVR value of 1 and the CVI value of 0.1 which was categorized as very good. Based on the results of the analysis and discussion, it can be concluded that the product being developed is categorized as feasible.
The concept of diffraction and interference of light is one of the abstract concepts of physics. The process of light diffraction and interference occurs in the abstract. Learning about diffraction and light interference requires media that represent the events. Cognitive structures can represent the quality of students' understanding. Learning Physics is easier to understand through direct experience in the form of practicum. Abstract Physics concepts will be easier to learn with the appropriate visualization. One of the virtual practicums' media uses PhET virtual simulations to improve students' cognitive structure is measured using concept map questions and supported by description questions. The purpose of this research is to increase the cognitive structure of students by using PhET. This research is quantitative research and the experimental design used the experiment method. There are three groups in the experiment, that is a virtual simulation, a real practicum as an experiment class, and a control class. The results of the one-way ANOVA test on the concept map questions showed a significance value (p) 0.05, meaning that there were differences in cognitive structure between groups. The significance value (p) between the virtual simulation group and the real practicum group was 0.014, while the significance value between the virtual simulation group and the control class was 0.00, meaning that there was a significant difference in learning effectiveness between groups. Based on the data of the research concluded that physics learning assisted by virtual simulations can develop students' cognitive structures on the concepts of diffraction and light interference.
<span>Penelitian ini bertujuan menghasilkan alat pendeteksi suhu dan kelembaban terintegrasi dengan internet berbasis NodeMCU melalui WEB sebagai media informasi pada budidaya jamur tiram. Alat pendeteksi suhu dan kelembaban telah dikembangkan dengan mengkombinasikan sensor DHT11, NodeMCU, dan sketch program Arduino IDE sebagai pengirim data ke WEB dan relay sebagai saklar pompa. Hasil eksperimen telah memperlihatkan data pada WEB serta relay dapat menyalakan pompa saat alat mendeteksi kelembaban <80% dapat menyirami rak jamur tiram sedangkan saat alat mendeteksi kelembaban >80% relay mematikan pompa dan hasil panen tanpa perlakuan rata-rata perhari 1kg sedangkan dengan perlakuan rata-rata perhari 2kg. Demikian dapat disimpulkan alat pendeteksi suhu dan kelembaban mampu memberikan informasi dan membantu menaikkan hasil panen petani jamur tiram.</span>
Factors that affect the growth of catfish include water temperature, pH levels, and feeding according to the growth of catfish. Feeding and water replacement are currently still done manually, using human power. Maintaining feed and water quality in the tub automatically is necessary to save time and effort. The automatic settings to maintain feed and water temperature as well as good water acidity for catfish in the tub can use the NodeMCU microcontroller. This research method is carried out by designing tools, testing tools, objects and stages of tools and concluding. Parameters of water temperature and pH levels of water are sent to the telegram application, as well as to regulate the discharge of water, a pump that works automatically is used through a relay that is installed automatically. The monitoring results are successfully displayed via the ThingViewer application. The tool has worked well with tests carried out including testing the design of the tool, testing the temperature sensor, testing the pH sensor, and testing the sending of orders from Telegram. The yields obtained were different between the two treatments, namely without using tools (non-tools) using tools (tools), the ideal growth of catfish for a temperature of 29 °C and a minimum pH of 6.5 and a maximum of 9.
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