Judul: Perbandingan Fungsionalitas dan Kinerja Spatial-DBMS (PostgreSQL/PostGIS dan MonetDB/Spatial)
Abstrak: Spatial-DBMS is a software module that can work with an underlying database management system and support multiple spatial data models, spatial indexing, and spatial function. Several examples of spatial-DBMS is PostgreSQL, MYSQL, IBM DB2, Oracle, SQL Server, and MonetDB. PostgreSQL as a well-known spatial-DBMS has been widely used all over the world. Meanwhile, MonetDB is still in the phase of system development and has many rooms for improvement. This research compared the two spatial-DBMS in terms of functionality and performance. The results showed that PostgreSQL has more complete spatial function compared to MonetDB. From their performance, it was found that MonetDB is better than PostgreSQL in handling simple non-spatial queries. As for the simple and complex spatial queries, PostgreSQL has shown better performance compared to MonetDB.
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Judul: Develoment of a spatial database management system using object-relation database and web technology
Abstrak: The increasing need of spatial data and the complexity of GIS analysis, has affected the importance of the availability GIS data as well as the method to provide the GIS data become a great challenge to meet the user needs. The utilization of Information Technology, especially Internet, has affected to the effectiveness of GIS data sharing, dissemination and how the data accessed and manipulated. Most of spatial database management manages the GIS data separate descriptive data management from geospatial data management (hybrid approach), which sometimes implies difficulties in data management such as querying, recovery, optimization and geometric computations. The objectives of this research are to; [1] develop a system of spatial database management using object-relational database and web technology, [2] develop a system and tools to store, access, retrieve and use the integrated spatial database. To avoid the weakness of hybrid approach, an integrated approach spatial database management system was used in this research. By taking the strength of Object Relational Database in managing complex process and complex querying, a web based application has been built to provide the front-end application to access GIS data through Internet/Intranet. The application system has some functionality such as: spatial database and meta- database management, spatial data and metadata catalog and presentation, and user management. By using this application system, both of data type can be managed in integrated approach, which means that all data stored within the same database management system, and keep the close relation between spatial data and attribute data or metadata. This approach is much better than hybrid approach in spatial database management system. Currently, the application system only handle shapefile data format. Even the map file and legend can generate dynamically (on the fly) by the application, but it is limited for geomorphology theme only. It is recommended to improve these capabilities to accept more different data format and improve the data sharing function (clearinghouse) by applying Z.39 protocol...dst
Keyword: Spatial database management, Object relational database, Database normalization, Geospatial metadata

Judul: Sintesis Nitril Satu-Wadah dari Asam Lemak Jenuh
Abstrak: Nitrile is an important intermediate for fine-chemicals industries. In particular, fatty nitriles can be used for the production of bio-based surfactants, lubricant oils, and other high-valued chemicals. The aim of this study was to develop an efficient synthesis method for direct conversion of saturated fatty acids into their nitrile analogues. This study was expected to enhance the economical value of crude palm oil and crude palm kernel oil. The synthesis was conducted in one-pot reaction by refluxing fatty acid and excess of acetonitrile in acidic condition. The optimum condition for this reaction was at 115 °C for 24 hours with yields of 50, 50, 70, and 75% for lauric acid (C-12), myristic acid (C-14), palmitic acid (C-16), and stearic acid (C-18), respectively. Purity of the fatty nitriles obtained through this method were confirmed by thin layer chromatography, Fourier transform infrared spectra, nuclear magnetic resonance spectra, and melting-points.
Keyword: one-pot synthesis, fatty nitrile, fatty acid