Kebutuhan energi listrik di Indonesia tahun 2014 mencapai 205 TWh dan di prediksi mengalami peningkatan sebesar 8,3% setiap tahunnya, hal ini dapat menyebabkan Indonesia menjadi negara pengimpor energi di tahun 2033. Permasalahan tersebut dapat diatasi dengan melakukan pengembangan energi alternatif, salah satunya memanfaatkan waste vibration energy dari gerakan kendaraan bermotor menggunakan polisi tidur piezoelektrik. Polisi tidur piezoelektrik yang dirancang pada penelitian terdiri atas sistem mekanik polisi tidur yang berfungsi menerima masukan dari tekanan kendaraan bermotor, sistem kantilever piezoelektrik sebagai komponen penghasil energi listrik dan sistem harvesting energy sebagai pemanen energi dari material piezoelektrik. Satu modul sistem terdiri dari rangkaian paralel piezoelektrik yang dihubungkan dengan buck konverter MB39C811. Sistem yang paling maksimal menghasilkan energi adalah rangkaian lima modul secara paralel. Polisi tidur piezoelektrik mam pu menghasilkan daya listrik dengan masukan 60 kali lindasan kendaran bermotor sebesar 2.166mWh dengan efisiensi 2.87 % dibandingkan dengan masukan manual.
The study aimed to determine: (1) the effect of online inquiry learning methods on increasing the knowledge of basic soccer techniques for class XI students and (2) differences in knowledge of basic soccer techniques for class XI students between the experimental group and the control group. The method uses a “pre-test post-test control group design" experiment. The sampling technique is simple random sampling, totaling 33 students in the experimental class with the inquiry learning method treatment and 34 students in the control class. The instrument used is an essay test. Data analysis used a t-test with a significance level of 5%. The study results: (1) There is a significant effect of the online inquiry learning method on increasing the knowledge of basic soccer techniques for class XI students, the t value is 12.158 > t table is 1.693, and the significance is 0.000 < 0.05. (2) There is a significant difference in the knowledge of basic football techniques of class XI students between the experimental group and the control group; the t-count value is 9.617 > t-table 1.668, and the significance is 0.000 < 0.05.
Information Technology has played an important role as a medium of information and communication in the field of education, one of which is in the Academic Management of Schools. In the world of educational technology it is not only related to the internet but can also be seen from the system or how to teach in schools. At present, the learning process using E-learning can be interactive so that students are able to interact with technology as a learning medium. Web-based learning media (e-learning) is a web that can help educators in the rapidly developing era of information and communication technology development. In this research, the problem that arises in the school environment is that there is no special place for students and teachers to be organized in obtaining learning materials and collecting assignments, documentation of knowledge of learning materials that are not stored properly, so it takes a long time to find the required knowledge back. Therefore used data collection methods, namely the method of observation, interview methods (interviews), and literature study. The Agile method is the most appropriate method used to design this system with the aim that the author can help ease the task of students and teachers in carrying out their duties. The results achieved in making the e-learning application at SDN Tengah 01 KramatJati are that students can understand material without a time limit, consult, take quizzes, upload assignments and can immediately see their learning results in person, while teachers can upload material, create questions and give them directly live.
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