Judul: Spatial scan statistic for aids hotspots detection at regencies and municipalities in Java
Abstrak: Scan statistic is a statistical method with many potential applications. It is designed to detect a local excess of events and to test if such an excess can reasonably have occurred by chance. It can be applied on wide area of interest, such as on disease clustering. In this research spatial scan statistic was applied important to detect the locations of the significant hotspot clusters of severe and dangerous disease, AIDS. This research applied the probability distribution generating events of poisson under the null hypothesis, supported by likelihood ratio test analysis to get the statistic test value and a Monte Carlo simulation to obtain the significant hotspot cluster from calculation of those statistic test values in computational process algorithm. Analysis with 19 percents of the population at risk of maximum spatial cluster size and the cilcular spatial window shape, spatial scan statistic presented the significant hotspot clusters of AIDS cases in Java. The places considered as hotspot are the municipalities of Center Jakarta and North Jakarta, Bandung, Malang, Surahaya, Semarang, Yogyakarta, and Salatiga. Based on the fact, government has to provide AIDS eradication and surveillance program in the hotspot area while the program of prevention must be implemented in the surrounding area (non hotspot area).
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Judul: The spatial scan statistics for detecting dengue fever hotspot in Bogor municipality
Abstrak: The dengue fever is one of disease that could be a dangerous threat in our country, included Bogor Municipality. Since dengue fever are not spread evenly across maps, so the problem oriented policing pushes health officials to identify where it is at its worst, and most importantly, where and when one may emerge. A spatial scan statistic is used to detect and evaluate dengue fever clusters in a spatial setting in Bogor Municipality under the Poisson setting. Beside that, to perform the hotspot geographical surveillance map was also objected in this study. Bogor Municipality wields 823283 populations. This region consist of 68 villages and 93% whish are the risky district of suffering dengue fever. The study has shown the presence of two hotspots of dengue fever in Bogor Municipality. The primary hotspot was detected around the north of Bogor as well as in the Middle Bogor and Tanah Sareal distrinct.
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Judul: Pelumas Aktif Dengan Bahan Dasar Minyak Ikan Dan Aditif Znochitosan Particle.
Abstrak: Pelumas memiliki peranan penting dalam meminimalkan fungsi keausan pada sistem mekanik. Synthetic liquids, minyak nabati (biolubricant) serta berbagai aditif telah banyak digunakan. Karakteristik minyak ikan dan sifat fungsional chitosan yang dapat berperan sebagai aditif, merupakan peluang dalam pengembangan pelumas baru yang ramah lingkungan. Tujuan penelitian adalah melakukan pembuatan dan karakterisasi pelumas aktif dengan bahan dasar minyak ikan dan aditif partikel ZnO-chitosan. Minyak dasar pelumas dibuat melalui reaksi epoksidasi minyak ikan dengan karakteristik bilangan oksiran (4,74±0,09) %, bilangan iod (49,91±1,9) gI2/100g, bilangan peroksida (59,33±3,05) meq/kg, dan asam lemak bebas (11,07± 0,10) %. Kombinasi aditif ZnO 0,5% dengan partikel chitosan 0,5% memberikan pengaruh terhadap pelumas minyak ikan dengan karakteristik terbaik, berupa scar diameter (1,16±0,04) mm, viskositas kinematik pada suhu 40°C (66,50±0,35) mm2/s dan korosi bilah tembaga grade 1A.
Keyword: Chitosan, minyak ikan, pelumas, ZnO