Judul: Utilization of Himawari-8 Hotspot Data for Land and Forest Fires Tracing, Utilization of Himawari-8 Hotspot Data for Land and Forest Fires Tracing
Abstrak: The use of hotspots in the early warning system for forest and land fires has been applied and is considered successful. Currently, there are regulations governing the use of hotspots in the above context, as stated in regulation No. P.8/Menlhk/Setjen/Kum.1/3/2018 concerning Fixed Procedures for Field Checking of Hotspot Information and/or Forest and Land Fires Information. However, over time, currently in Indonesia hotspot data has also been used to trace fire propagation as one of the evidences of the cause (source of fire) in cases of forest and land fires. Hotspot data used for tracking forest and land fires generally comes from the Terra/Aqua (MODIS), NOAA (AVHRR), and SNPP (VIIRS) satellites. The three satellites have a recording frequency of 12 – 24 hours per day so as to produce satellite data with low temporal resolution, even though currently there is hotspot data available with a temporal resolution of 10 minutes, namely hotspots from AHI (Advanced Himawari Imager) data from the Himawari-8 satellite. This study examined the use of AHI (Himawari-8) hotspot data compared to MODIS, AVHRR, and VIIRS for forest and land fires tracing in Seruyan Hilir, Tanjung Puting National Park, and the area between the Barito and Negara rivers. This study begins with the identification of the time period of the fire’s incidence on the Sentinel-2. Forest and land fires indicator has been observed from the appearance of flames, burn scar, and plumes of smoke. Furthermore, Hotspots were selected at a confidence level ≥80%. This analysis was based on the detection time series of hotspots. The study showed that AHI (Himawari-8) hotspots could be used to see fire propagation and explain the phenomenon of hotspot leaps (hotspot discontinuity). In addition, AHI (Himawari-8) hotspots can also be used to detect fires that rapidly spread and easily extinguish in low biomass areas. Based on these results, the use of AHI (Himawari-8) hotspots can be used in tracing the initial source of fire in cases of forest and land fires.
Keyword: resolusi temporal, Himawari-8, rambatan kebakaran hutan dan lahan

Judul: Studi sebaran titik panas (Hotspot) sebagai indikator kebakaran hutan dan lahan di Propinsi Jambi tahun 2000 - 2004
Abstrak: Deteksi kebakaran hutan merupakan salah satu kegiatan yang penting dalam pengendalian kebakaran hutan. Salah satu cara deteksi kebakaran adalah melakukan deteksi titik panas (hotspot) dengan menggunakan satelit NOAA (National Oceanic and Atmospheric Administration), yang dilengkapi dengan sensor AVHRR (Advanced Very High Resolution Radiometer). Suatu areal yang bersuhu 42oC, dapat mengindikasikan adanya titik panas (hotspot).
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Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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