Judul: Modul Visualisasi Menggunakan GeoExplorer dalam Sistem Informasi Berbasis Web untuk Data Titik Panas di Indonesia
Abstrak: Forest fire is a serious problem because it can cause negative impacts for the environment. One of the forest fire prevention efforts is to build a web-based geographic information system (GIS) to manage historical hotspot data as indicators of fire occurrences. A web-based GIS for hotspots distribution in Indonesia was developed using OpenLayers in the previous research. The GIS still has several limitations in providing an attractive user interface. Therefore, in this study we created a visualization module in the GIS for hotspot distribution using GeoExplorer. With the visualization module, users can interactively explore the maps of hotspot distribution. In addition, historical hotspots data can be easily managed so that the system can assist users in obtaining summaries of historical hotspots data for the regions in Indonesia. The improved GIS presents summaries of hotspots data in forms of maps, graphs, and tables. The system also has additional supporting features in the visualization module using OpenLayers and GeoExplorer.
Keyword: Bogor Agricultural University (IPB), OpenGeo Suite, OpenLayers, geographic information system, GeoExplorer, hotspot

Judul: Peningkatan Kinerja Sistem Spatial Data Warehouse Kebakaran Hutan Menggunakan GeoServer dan GeoMondrian
Abstrak: Forest fire can be periodically detected by satellite as hotspot areas that occur at specified time and location. The frequency of forest fire in Indonesia is high so the data collection of hotspots will be very large. That data collection of hotspots can be stored into specific storage such as data warehouse. A data warehouse system of forest fire was built in the previous research using GeoServer as web map server and GeoMondrian as OLAP Server. However, that system still has some limitations such as the poor system runtime and the low amount of retrieved hotspots. In this research, the system would be reconfigurated in order to fix those limitations so that the system performance would increase. The configuration involves some part of the system including Java Runtime Environment, database source, data cube schema, and error handling in OpenLayers. It has resulted 155 ms higher speed of runtime and 1310 higher number of retrieved hotspots.
Keyword: 

Judul: Karakteristik Carboxymethyl Chitosan Dengan Variasi Konsentrasi NaOH
Abstrak: Carboxymethyl chitosan is chitosan derivative product obtained from chemical modification. CMCh were made by alkalization process and carboxymethylation process. Factors that affect CMCh characteristics were excess sodium hydroxide in alkalization process, ratio between chitosan and monochloroacetic acid, and carboxymethylation temperature. The objectives of this research were to study the NaOH effect to CMCh characteristics, to learn process of making CMCh, to set the proper concentration of NaOH, and to analyze CMCh characteristics. CMCh yields were 110.72%-114.22%. CMCh pH value were 3.74-4.31. The optimum NaOH concentration to obtain the best CHCh was 10 M. Percentage of CMCh moisture content was 10.70%-11.42%. Ash content and nitrogen content of CMCh were 0.49%-0.50% and 4.52%-4.81%. CMCh viscousity was 8.25 cps. Percentage of CMCh solubility was 61.61%-91.50%. The different functional groups from chitosan which observed in CMCh were C=O group, CH group from alkene functional group, C−O group, and C−O−C group.
Keyword: solubility., functional group, CMCh characteristics, chitosan, carboxymethyl chitosan