Pembangunan pedesaan pada era Orde Baru telah berhasil membawa Indonesia mencapai beberapa keberh... more Pembangunan pedesaan pada era Orde Baru telah berhasil membawa Indonesia mencapai beberapa keberhasilan dalam pembangunan fisik. Namun, keberhasilan tersebut belum sepenuhnya dapat menyiapkan masyarakat desa untuk memanfaatkan berbagai peluang yang ada di sekitarnya, baik yang tercipta karena proses pembangunan itu sendiri maupun karena sebab lain. Menilik pengalaman Korea Selatan dengan Saemaul Undong-nya maka pembangunan pedesaan Indonesia diawali dengan kondisi yang relatif hampir sama dengan Korea Selatan, yaitu infrastruktur terbatas dan kondisi kehidupan masyarakat sangat sulit akibat peperangan dan konflik internal di berbagai wilayah. Perbedaan mendasar terletak pada kejelian pemerintah saat itu dalam memanfaatkan momentum kondisi masyarakat yang relatif homogen dan rasa kebersamaan yang masih kuat sebagai satu komunitas. Beberapa upaya seperti peningkatan produksi pangan terutama beras telah berhasil dicapai, namun upaya tersebut belum berhasil mengurangi jumlah penduduk yang menggantungkan hidupnya pada kegiatan pertanian, seperti yang terjadi di Korea Selatan. Pembangunan pedesaan di Indonesia kurang dilandasi oleh upaya yang sistematis untuk mengembangkan kapasitas penduduk sebagai individu dan bagian dari suatu komunitas. Dalam kondisi kehidupan masyarakat pedesaan yang makin heterogen dan kemampuan pemerintah sebagai penggerak utama pembangunan pedesaan yang makin terbatas maka untuk mempercepat pembangunan pedesaan dibutuhkan kebersamaan masyarakat sebagai penggerak utamanya. Dengan partisipasi aktif masyarakat desa, beberapa perubahan mendasar dalam gerak pembangunan desa di Indonesia dapat dilakukan. Untuk dapat mencapai hal itu, diperlukan berbagai prasyarat, salah satunya terkait dengan upaya membangun momentum baru bagi tumbuhnya partisipasi aktif masyarakat.
Integrating GIS and Imagery Through XML-Based Information Mediation
In this paper, we investigate a mediation-based approach to integrating information from geospati... more In this paper, we investigate a mediation-based approach to integrating information from geospatial information sources such as GIS’s and databases of geo-referenced imagery. This approach is based on the use of XML to represent the information at the sources, by exporting XML Document Type Definitions (DTD’s) associated with each source, and employing XMLbased query languages to query integrated views of information at the mediator. Our goal is to enable users to issue a single query to the mediator, and provide the capability to return a result that seamlessly combines information from multiple sources. This paper describes issues in designing such a mediated system for geospatial data. Our notion of mediation for geospatial data is the “logical integration” of data achieved by creating correspondences between related spatial information, similar to the way mediation is done in “standard” databases. Thus, this notion of mediation does not depend on the development of spatial algorithms that operate on images or vector data and achieve “physical integration” through techniques such as image conflation. However, the mediator architecture does allow for the integration of physical integration techniques. The paper discusses issues related to wrapping of GIS and other geospatial sources and issues in querying such sources using an XML-based query language.
Multiple voluminous sector collapses at Volcán Barú, Panama
Our recent work on Volcán Barú, an andesitic dome complex in Western Panama, has revealed a signi... more Our recent work on Volcán Barú, an andesitic dome complex in Western Panama, has revealed a significant hazard from debris avalanches. Field observations of volcanic debris avalanche deposits and study of aerial photo data have revealed two avalanche units from Barú, the Barriles and the Caisán Deposits, both attributed to sector collapse of the western flank. Sherrod and others, 2007, also recognized this as one of the potential volcanic hazards of Panama's youngest volcanic center. The Barriles Deposit yielded two radiocarbon ages: 8590 ±50 ybp and 8000 ±30 ybp. The Caisán Deposit was also dated and is beyond the radiocarbon range (>43,000 ybp). From satellite imagery and field observations of distal hummocks, the total runout length of the Caisán deposit was ˜50 km covering 1180-km2. The Barriles Deposit extended to about 43 km. Despite heavy vegetation of the field area, 576-km2 were analyzed and over 4000 individual hummocks were digitized from aerial photography. Statistical analysis of hummock locations and geometries depict flow patterns over the entire debris fan and reflect the effects of underlying topography. The Barriles avalanche deposit has an estimated volume of 39 km3 to 61 km3 while the Caisán Deposit is slightly larger: 57 km3 to 64 km3. We conclude that debris avalanches of Volcán Barú are rare examples of unconfined volcanic debris avalanche deposits that rank among the world's most voluminous such as ancestral Mount Shasta, USA; Socompa, Chile/Argentina; and Shiveluch, Russia. Supported by the NSF Partnerships in International Research and Education Grant [0530109] this work is part of an on-going collaboration between the Michigan Tech Geology Department and Peace Corps. Reference: Sherrod, D.R., Vallance, J.W., Tapia Espinosa, A., and McGeehin, J.P., 2007, Volcán Barú eruptive history and volcano-hazards assessment, Open-File Report 2007-1401: Reston, VA, The U.S. Geological Survey, p. 33. A view East into the crater of Volcán Barú, Panama. The modern dome marks the highest elevation within the breached rim.
Scientists are confronted with significant datamanagement problems due to the large volume and hi... more Scientists are confronted with significant datamanagement problems due to the large volume and high complexity of scientific data. In particular, the latter makes data integration a difficult technical challenge. In this paper, we describe our work on semantic mediation and scientific workflows, and discuss how these technologies address integration challenges in scientific data management. We first give an overview of the main data-integration problems that arise from heterogeneity in the syntax, structure, and semantics of data. Starting from a traditional mediator approach, we show how semantic extensions can facilitate data integration in complex, multipleworlds scenarios, where data sources cover different but related scientific domains. Such scenarios are not amenable to conventional schema-integration approaches. The core idea of semantic mediation is to augment database mediators and query evaluation algorithms with appropriate knowledge-representation techniques to exploit information from shared ontologies. Semantic mediation relies on semantic data registration, which associates existing data with semantic information from an ontology. The Kepler scientific workflow system addresses the problem of synthesizing, from existing tools and applications, reusable workflow components and analytical pipelines to automate scientific analyses. After presenting core features and example workflows in Kepler, we present a framework for adding semantic information to scientific workflows. The resulting system is aware of semantically plausible connections between workflow components as well as between data sources and workflow components. This information can be used by the scientist during workflow design, and by the workflow engineer for creating data transformation steps between semantically compatible but structurally incompatible analytical steps. *
Pembangunan pedesaan pada era Orde Baru telah berhasil membawa Indonesia mencapai beberapa keberh... more Pembangunan pedesaan pada era Orde Baru telah berhasil membawa Indonesia mencapai beberapa keberhasilan dalam pembangunan fisik. Namun, keberhasilan tersebut belum sepenuhnya dapat menyiapkan masyarakat desa untuk memanfaatkan berbagai peluang yang ada di sekitarnya, baik yang tercipta karena proses pembangunan itu sendiri maupun karena sebab lain. Menilik pengalaman Korea Selatan dengan Saemaul Undong-nya maka pembangunan pedesaan Indonesia diawali dengan kondisi yang relatif hampir sama dengan Korea Selatan, yaitu infrastruktur terbatas dan kondisi kehidupan masyarakat sangat sulit akibat peperangan dan konflik internal di berbagai wilayah. Perbedaan mendasar terletak pada kejelian pemerintah saat itu dalam memanfaatkan momentum kondisi masyarakat yang relatif homogen dan rasa kebersamaan yang masih kuat sebagai satu komunitas. Beberapa upaya seperti peningkatan produksi pangan terutama beras telah berhasil dicapai, namun upaya tersebut belum berhasil mengurangi jumlah penduduk yang menggantungkan hidupnya pada kegiatan pertanian, seperti yang terjadi di Korea Selatan. Pembangunan pedesaan di Indonesia kurang dilandasi oleh upaya yang sistematis untuk mengembangkan kapasitas penduduk sebagai individu dan bagian dari suatu komunitas. Dalam kondisi kehidupan masyarakat pedesaan yang makin heterogen dan kemampuan pemerintah sebagai penggerak utama pembangunan pedesaan yang makin terbatas maka untuk mempercepat pembangunan pedesaan dibutuhkan kebersamaan masyarakat sebagai penggerak utamanya. Dengan partisipasi aktif masyarakat desa, beberapa perubahan mendasar dalam gerak pembangunan desa di Indonesia dapat dilakukan. Untuk dapat mencapai hal itu, diperlukan berbagai prasyarat, salah satunya terkait dengan upaya membangun momentum baru bagi tumbuhnya partisipasi aktif masyarakat.
Integrating GIS and Imagery Through XML-Based Information Mediation
In this paper, we investigate a mediation-based approach to integrating information from geospati... more In this paper, we investigate a mediation-based approach to integrating information from geospatial information sources such as GIS’s and databases of geo-referenced imagery. This approach is based on the use of XML to represent the information at the sources, by exporting XML Document Type Definitions (DTD’s) associated with each source, and employing XMLbased query languages to query integrated views of information at the mediator. Our goal is to enable users to issue a single query to the mediator, and provide the capability to return a result that seamlessly combines information from multiple sources. This paper describes issues in designing such a mediated system for geospatial data. Our notion of mediation for geospatial data is the “logical integration” of data achieved by creating correspondences between related spatial information, similar to the way mediation is done in “standard” databases. Thus, this notion of mediation does not depend on the development of spatial algorithms that operate on images or vector data and achieve “physical integration” through techniques such as image conflation. However, the mediator architecture does allow for the integration of physical integration techniques. The paper discusses issues related to wrapping of GIS and other geospatial sources and issues in querying such sources using an XML-based query language.
Multiple voluminous sector collapses at Volcán Barú, Panama
Our recent work on Volcán Barú, an andesitic dome complex in Western Panama, has revealed a signi... more Our recent work on Volcán Barú, an andesitic dome complex in Western Panama, has revealed a significant hazard from debris avalanches. Field observations of volcanic debris avalanche deposits and study of aerial photo data have revealed two avalanche units from Barú, the Barriles and the Caisán Deposits, both attributed to sector collapse of the western flank. Sherrod and others, 2007, also recognized this as one of the potential volcanic hazards of Panama's youngest volcanic center. The Barriles Deposit yielded two radiocarbon ages: 8590 ±50 ybp and 8000 ±30 ybp. The Caisán Deposit was also dated and is beyond the radiocarbon range (>43,000 ybp). From satellite imagery and field observations of distal hummocks, the total runout length of the Caisán deposit was ˜50 km covering 1180-km2. The Barriles Deposit extended to about 43 km. Despite heavy vegetation of the field area, 576-km2 were analyzed and over 4000 individual hummocks were digitized from aerial photography. Statistical analysis of hummock locations and geometries depict flow patterns over the entire debris fan and reflect the effects of underlying topography. The Barriles avalanche deposit has an estimated volume of 39 km3 to 61 km3 while the Caisán Deposit is slightly larger: 57 km3 to 64 km3. We conclude that debris avalanches of Volcán Barú are rare examples of unconfined volcanic debris avalanche deposits that rank among the world's most voluminous such as ancestral Mount Shasta, USA; Socompa, Chile/Argentina; and Shiveluch, Russia. Supported by the NSF Partnerships in International Research and Education Grant [0530109] this work is part of an on-going collaboration between the Michigan Tech Geology Department and Peace Corps. Reference: Sherrod, D.R., Vallance, J.W., Tapia Espinosa, A., and McGeehin, J.P., 2007, Volcán Barú eruptive history and volcano-hazards assessment, Open-File Report 2007-1401: Reston, VA, The U.S. Geological Survey, p. 33. A view East into the crater of Volcán Barú, Panama. The modern dome marks the highest elevation within the breached rim.
Scientists are confronted with significant datamanagement problems due to the large volume and hi... more Scientists are confronted with significant datamanagement problems due to the large volume and high complexity of scientific data. In particular, the latter makes data integration a difficult technical challenge. In this paper, we describe our work on semantic mediation and scientific workflows, and discuss how these technologies address integration challenges in scientific data management. We first give an overview of the main data-integration problems that arise from heterogeneity in the syntax, structure, and semantics of data. Starting from a traditional mediator approach, we show how semantic extensions can facilitate data integration in complex, multipleworlds scenarios, where data sources cover different but related scientific domains. Such scenarios are not amenable to conventional schema-integration approaches. The core idea of semantic mediation is to augment database mediators and query evaluation algorithms with appropriate knowledge-representation techniques to exploit information from shared ontologies. Semantic mediation relies on semantic data registration, which associates existing data with semantic information from an ontology. The Kepler scientific workflow system addresses the problem of synthesizing, from existing tools and applications, reusable workflow components and analytical pipelines to automate scientific analyses. After presenting core features and example workflows in Kepler, we present a framework for adding semantic information to scientific workflows. The resulting system is aware of semantically plausible connections between workflow components as well as between data sources and workflow components. This information can be used by the scientist during workflow design, and by the workflow engineer for creating data transformation steps between semantically compatible but structurally incompatible analytical steps. *
Uploads
Papers by Roni Ahmadi