Judul: Pola Sebaran Titik Panas (Hotspot) Sebagai Indikator Terjadinya Kebakaran Hutan dan Lahan di Kabupaten Aceh Barat
Abstrak: Kabupaten Aceh Barat merupakan salah satu kabupaten yang sering terjadi kebakaran hutan dan lahan. Perlu adanya melakukan pengendalian kebakaran hutan dan lahan, salah satunya yaitu pencegahan. Pencegahan kebakaran hutan dan lahan dapat memanfaatkan data titik panas untuk dianalisis dengan menggunakan Sistem Informasi Geografis (SIG). Penelitian ini bertujuan menganalisis sebaran titik panas dan hubungan curah hujan dengan titik panas sebagai indikator terjadinya kebakaran hutan dan lahan di Kabupaten Aceh Barat pada tahun 2014-2019. Penelitian ini menggunakan data titik panas NASA MODIS, peta sebaran penutupan lahan, peta sebaran lahan gambut, peta administrasi dan data curah hujan dari BMKG. Hasil penelitian ditemukan sebanyak 576 titik panas di Kabupaten Aceh Barat dari tahun 2014-2019. Kecamatan dengan jumlah titik panas terbanyak berada di Kecamatan Samatiga yaitu sebanyak 131 titik panas. Titik panas paling mendominasi di tutupan lahan gambut sebanyak 64% dan daerah penutupan lahan belukar rawa sebanyak 126 titik panas. Hasil uji korelasi menunjukkan curah hujan dengan titik panas memiliki korelasi dengan arah korelasi negatif, bahwa penurunan curah hujan diikuti dengan kenaikan titik panas., Aceh Barat District is one of the districts where forest and land fires often occur. It is necessary to control forest and land fires, one of which is prevention. Forest and land fires prevention can be done by utilizing hotspot data for analysis using geographic information systems (GIS). This research aims to analyze the distribution of hotspots and the correlation between rainfall and hotspots as an indicator of the occurrence of forest and land fires in West Aceh Regency in 2014-2019. This research uses NASA MODIS hotspots, land cover distribution maps, peat land distribution maps, administrative maps and rainfall data from BMKG. The resuls of the research found that there were 576 hotspots in West Aceh Regency from 2014-2019. The district with the highest number of hotspots is in Samatiga District, namely 131 hotspots. The most dominant hotspots are in the peatland cover, as much as 64% and in the swamp scrub land cover area with 126 hotspots. Correlation test results show that rainfall with a negative correlation, that the decrease in rainfall is followed by an increase in hotspots.
Keyword: Aceh Barat, Curah hujan, lahan gambut, penutupan lahan, titik panas

Judul: Analysis of Hotspots, Precipitation, and Sea Surface Temperature Anomalies in East Tanjung Jabung Regency, Jambi
Abstrak: Kebakaran hutan dan lahan merupakan permasalahan serius yang terjadi setiap tahun di Indonesia. Penelitian ini bertujuan mengidentifikasi keterkaitan antara titik panas (hotspot), curah hujan, dan anomali Sea Surface Temperature (SST) sebagai indikator potensi terjadinya kebakaran gambut di Kabupaten Tanjung Jabung Timur. Penelitian ini dilaksanakan pada bulan September-Desember 2023. Data yang digunakan adalah data sekunder. Uji korelasi dilakukan antara data hotspot, curah hujan bulanan, dan SSTA Nino 3.4 pada tahun 2015-2022 untuk mengetahui adanya hubungan antara curah hujan dengan jumlah hotspot yang terdeteksi dan faktor yang memengaruhinya. Hasil dari penelitian ini adalah hubungan hotspot dengan curah hujan berkorelasi negatif dengan nilai r sebesar -0.401 yang termasuk dalam kategori cukup, dan hubungan hotspot dengan anomali SST berkorelasi positif. Hal ini menunjukkan bahwa jumlah hotspot di Kabupaten Tanjung Jabung Timur pada tahun 2015-2022 berkaitan erat dengan curah hujan, namun tidak terlalu erat dengan SST anomalies., Forest and land fires are a serious problem that occurs every year in Indonesia. This research aims to identify the relationship between hotspots, precipitation and Sea Surface Temperature Anomalies (SSTA) as indicators of the potential for peatland fires in East Tanjung Jabung Regency. This research was conducted in September-December 2023. The data used is secondary data. Correlation tests were carried out between hotspot data, monthly precipitation, and SSTA Nino 3.4 in 2015-2022 to determine the relationship between precipitation, the number of hotspots detected, and the factors that influence them. The results of this research are that the relationship between hotspots and precipitation is negatively correlated with an r value of -0.400 which is included in the sufficient category, and the relationship between hotspots and anomaly SST is positively correlated. These findings showed that the number of hotspots in East Tanjung Jabung Regency is closely related to precipitation but not too closely with SST anomalies.
Keyword: curah hujan, titik panas, kebakaran gambut, nino 3.4

Judul: Optimization of Alginate-Chitosan Microcapsules Formation for Leydig Cells Encapsulation
Abstrak: Hypogonadism is a clinical condition characterized by low concentrations of testosterone. It is caused by malfunction of Leydig cells in producing testosterone. Encapsulation method will protect the transplanted cells from the immune system rejection. The aims of this study was to optimize the formation of microcapsules for Leydig cells encapsulation. The microcapsules were made of alginate and chitosan as the first and the second coating agents, respectively. The result showed that the minimum concentration of alginate was 1.5% (w/v) with a viscosity of 33.8 cPs, resulted spherical microcapsules with diameters of 230-270 µm. The optimum concentration of chitosan as the second coating agent was 0.5% (w/v), resulted spherical microcapsule with mechanical stability in 4 hours. Leydig cells can be trapped inside the capsule with a density that proportional with concentration of cells used in the encapsulation.
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