One of the extreme weather that happened in Indonesia is landspout. Landspout is virtually a tornado that forms from a thunderstorm that is not a supercell. On November 20, 2017 at 08.00 UTC there was a landspout in the village of Kertasada, Kalianget District, Sumenep Regency of Madura, East Java, Indonesia which caused damage to dozens of houses and many shops and warehouses. The study was done to determine the differences condition of the atmosphere before, during, and after the phenomenon based on synoptic analysis, atmospheric instability analysis, satellite image analysis, and radar image analysis. The results of the synoptic analysis of two weather parameters, pressure and temperature, also supported the occurrence of landspout phenomenon. Pressure and air temperature for two days before the occurrence of the landspout had a relatively similar pattern, but the average pressure appeared higher on the day of the incident. Temperature patterns showed a decrease from one hour before the incident, which was 3.2°C. The surface wind analysis showed wind speed during the day of the incident was higher than the previous two days, with a difference of 6 m s-1. The analysis of atmospheric instability when the incidence of the Lifted-Index (LI) values indicates the ‘unstable atmosphere and possible thunderstorm criteria. K-Index (KI) shows the possible to become moderate convetive’ The total index (TT) showed a stronger convective, local lightning potential and a value were higher than the previous two days. Severe Weather Threat Index (SWEAT) showed the potential of lightweight thunderstorm with greater instability value than the previous day while the Convective Avalilable Potential Energy (CAPE) index showed a large and potentially stormy energy. Then, in this research used Himawari-8 satellite and Radar C-band to detected convective clouds. According to Satellite Animation and Interactive Diagnosis (SATAID) satellite data, there is a Cumulonimbus (cb) cloud clump in the Sumenep region of Madura, which is meant to be potentially a landspout.
AbstrakPada World Radio Conference 2003 (WRC-03), The International Telecomunications Union (ITU) merekomendasikan alokasi baru untuk frekuensi bebas pada spectrum, 5470 -5725 MHz. Sebagaimana diketahui beberapa system berjalan seperti Radar cuaca, Radar Satelite dan radar militer memiliki potensi untuk terinterferensi dengan alokasi baru ini. Sehingga untuk meminimalisir potensi gangguan pada radar sistem tersebut maka ditetapkan suatu algoritma yang disebut Dynamic Frequency Selection (DFS). Badan Meteorologi Klimatologi dan Geofisika (BMKG) hingga akhir tahun 2012 mengoperasikan 27 Radar Cuaca C-Band dengan Frekuensi kisaran 5 GHz (5.6 -5.65) Ghz. Penelitian ini dilakukan untuk mengetahui potensi Interferensi Frekuensi operasional Radar Cuaca C-Band di Indonesia dengan menerapkan metode Silent Mode pada radar cuaca untuk mendapatkan data sumber interferensi, pengukuran frekuensi di lingkungan operasional radar dan upaya proteksinya dengan melakukan analisis teknik terhadap spesifikasi operasional radar C-Band yang di Operasikan BMKG dengan parameter algoritma DFS sehingga dapat diketahui efektifitas kinerja DFS-ETSI dalam memproteksi Radar C-Band BMKG. Selain itu juga dilakukan diskusi dan analisis regulasi dan peraturan perundang-undangan dalam tataran internasional dan nasional khususnya terkait operasional Radar CBand. Sehingga diketahui adanya kelemahan pada algoritma DFS yang ada dan disampaikan saran perubahan serta usulan proteksi radar C-Band kepada regulator telekomunikasi di Indonesia
This study aims to analyze how the influence of vidio learning media on student competency achievement. The method used in this study was carried out by taking data from PubMed, ProQuest, Google Scholar databases, which were found in 2015-2021. The results showed that some of the learning media used by students were Vidio. In conclusion, Vidio as a learning medium is very influential in increasing knowledge, helping to get information about assignments, knowing the development of information, and can be used as material to deepen the material.
Keywords: Students, Learning Media, Vidio (Learning Media, Vidio, Student)
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.