This study aimed to determine using of props Rota Time on analytical skills of students on the concept of uniform circular motion. This research was conducted in class X MIA 1(experiment group) and X MIA 2 (control group) of Madrasah Aliyah Pembangunan UIN Syarif Hidayatullah Jakarta 2014. The research method used is the method of quasiexperimental design with nonequivalent control group design and purposive sampling technique. The instrument used was a test instrument in the form of questions and a description of non-test instrument in the form of observation sheet of activity and student questionnaire responses. Based on the test data analysis, obtained by the average value of students 'ability to analyze the use of props Rotation Timer lower than the average value of students' ability to analyze the use of props flexible wheel. Ability to analyze students excel in the experimental group students in the ability to analyze the aspects of organizing while the distinguishing aspect and attribute that is superior to the control class. Ability to analyze students excel in the experimental group only in the ability to analyze the aspects of organizing, while the distinguishing aspect and attribute that is superior to the control class with reference to the N-Gain Test where the experimental class gain increased by 26%, while the control group only 20%. At the distinguishing aspects of the control group were superior gain increased by 31%, while the experimental group only received an increase of 24% and on aspects of the class attribute the increased control that is superior with an increase of 20%, while the experimental group only received an increase of 17%. Furthermore, based on data analysis nontes, for observation sheet of student activity conclude that the experimental class in less favorable circumstances, compared with the control class. The data in the form of questionnaires nontes concluded that the overall implementation of props Rota Time in learning physics concepts uniform circular motion to obtain good response.

3D inversion modeling of subsurface based on gravity anomaly data and magnetic anomaly data used for identification hydrocarbon potential in “x”. Where in the study area there are up dome structures that indicate some possibilities, including igneous rock intrusion, carbonate build up and also mud diapir. 3D inversion modeling of gravity and magnetic anomaly data correlated with two seismic section which available in study location. 3D inversion model is performed on the residual anomaly data on the gravity model and 2D in the magnetic anomaly. The result of 3D inversion modeling of gravity anomaly data shows that the peak up dome is at a depth of study located around 800 meters from the surface, this result corresponds to spectrum analysis and depth on the seismic cross section, while the density value of the up-dome body is approximately 2.78 g/cm3. While on the magnetic anomaly that has been done, structure of the dome indicates an intrusion structure with anomaly susceptibilities show the structure of igneous rock.

Dimasa pandemi saat ini, kegiatan pengabdian kepada masyarakat ini bertujuan untuk mendeskripsikan pelaksanaan pelatihan penyusunan dan  penulisan laporan penelitian tindakan kelas (PTK) dan  mengukur tingkat ketercapaian pemahaman peserta dalam menyusun dan menulis laporan penelitian tindakan kelas (PTK). Dalam kegiatan pelatihan ini sasaran pesertanya adalah guru-guru MGMP di Kabupaten Serang. Metode pada pelatihan ini menggunakan metode diskusi dan simulasi atau pelatihan secara daring melalui aplikasi zoom. Pelaksanaan dalam program pengabdian kepada masyarakat ini terbagi menjadi tiga tahap yaitu tahap persiapan, tahap pelaksaan, dan tahap evaluasi. Teknik pengumpulan data berupa kuesioner dan dokumentasi hasil pelatihan yang diberikan setiap akhir pertemuan yang digunakan untuk perbaikan kualitas pelatihan. Denagan hasil kuisioner setelah kegiatan yang menyatakan bahwa  mitra sangat puas dan setuju dengan kegiatan pelatihan serta antusias jika akan diadakan kegiatan pengadian kepada masyarakat lagi di masa yang akan datang. Peserta termotivasi,  dan memiliki kemampuan untuk melakukan, menyusun, dan menyajikan laporan hasil penelitian tindakan kelas (PTK) mencapai 82%.

Numerical simulation of the satellites’s orbital velocity and orbital period on the earth has been performed. This research aimed to study satellites’s orbital velocity and orbital period on the earthbased on position function. Velocity equation has been gotten from modification equation of centripetal force and equation of earth’s gravitational force. Through numerical calculation of orbital velocityand orbital period equation by function discretization, we got that the velocity and period of satellite at height of 30000 km above the earth’s surface are 3.31 km/s and 19.18 hours, respectively.

The vehicle is an important requirement for daily activities. The increasing number of vehicles in Indonesia from year to year correlates with the worsening air quality, especially in big cities like Jakarta. Data also shows that 70% of air pollution in Jakarta comes from motorized vehicles that use fossil fuels. One source of energy that can be an alternative solution is electric-powered vehicles because they have advantages, which are not producing pollution. Electric vehicles generally use lithium batteries as a source of electric power. Lithium batteries that have been used up are generally just thrown away without going through the processing so that they will contaminate water and soil. Therefore, we want to make vehicles that are not dependent on fossil fuels, produce no pollution, and can do auto charging electric so they don't rely on PLN electricity. This vehicle can charge independently because it has an electromagnetic coil on the rear wheel that will produce GGL induction from the wheel rotation when the bike is moving. We call this vehicle MOBERAK (Environmentally Friendly Fuel-Free Motorbike).