Bimbingan Belajar Gratis Mata Pelajaran Matematika Tingkat SD di Yayasan Kencana Bakti Semesta (YKBS) Badung Bali

Parents' hope for their children pursuing formal education is to get maximum test scores and graduate with good grades. Thus, some efforts are made by parents to increase children's understanding of learning. Non-formal education at tutoring institutions is one of the parents' efforts. However, not all parents can provide tutoring facilities through non-formal institutions. Concrete steps are needed from various elements of society to overcome these problems, one of which is a lecturer. Lecturers carry out community service (PKM) by giving free mathematics tutoring at the elementary level within the Badung Bali Kencana Bakti Semesta Foundation (YKBS). The PKM aims to develop good learning habits, increase learning motivation, and increase learning achievement in mathematics. Tutoring is carried out 14 times, held on Wednesdays and Saturdays. The material provided refers to the students' textbooks and worksheets. A series of activity methods, namely (1) warming up through giving motivation to learn (2) explaining the material, (3) questions and answers, (4) quiz, (5) giving gifts, (6) giving post-test. The PKM activity can improve students' learning outcomes, as shown by the post-test results. The development of student motivation also shows good results, shown by the enthusiasm of students who ask for continuous tutoring activities

Landsat 8 Observation of the Internal Solitary Waves in the Lombok Strait

Landsat  8,  Landsat  Data  Continuity  Mission  (LDCM)  satellite,  was  launched  on  11 February 2013 with Operation Land Imager (OLI) sensors. Tis sensor has better radiometric performance than the previous mission, which is quantized in the 12-bit dynamic range due to an increase in the signal-to-noise (SNR) ratio. In this analysis, the spatio-temporal distribution of the propagation of the internal solitary wave (ISW) in the Lombok Strait was extracted from the Landsat 8 images described for the first time.  Tere were 14 ISW events studied for period 2014  -  2015  using  Landsat  8.  Te  manifestations  of  ISW  recorded  on  Landsat  8  images  were then extracted using digitization method to investigate and measure several parameters and ISW distribution in the Lombok Strait. Te estimation results of the average ISW phase velocity in this study are 2.05 ms-1 with the direction of propagation heading north at an average angle of 19.08°. Tis study has shown that Landsat 8 can be used to monitor and analyze several internal wave parameters in the ocean

Study of Internal Solitary Waves Feature Extraction Based on Stationary Wavelet Transform by Sentinel-1a Image in Lombok Strait

Stationary Wavelet Transform (SWT), mother function Symlet 4, shows an effective method for Internal Solitary Waves (ISW) feature extraction and four parameters (soliton numbers, first crest length, wavelength and propagation direction) estimation by Sentinel-1A C-band Synthetic Aperture Radar (SAR) imagery in Lombok Strait. The ISW feature can be distinguished from other features using the SWT noise reduction process and simple thresholding methods. ISW feature extraction results by SAR images can show ISW characteristics more clearly and can be used as a basis for obtaining ISW spatial-temporal distribution maps in the Lombok Strait. Our estimation results show that the arc-like type of ISW in the Lombok Strait propagated to the north of the sill with the detected soliton numbers are 2 solitons per packets with a wavelength about 3.20 km and the first crest length varies about 60.27 km near the Kangean Island with the propagation direction about 50.38 degree to the North