Urolithiasis as an extraarticular manifestation of ankylosing spondylitis

Tarjeta Postal de D. Achille Loria, a D. Pedro Dorado Montero, agradeciéndole el envío de su trabajo "Problemas Jurídicos Contemporáneos"

Data Ingestion for the Connected World

ABSTRACT In this paper, we argue that in many "Big Data" applications, getting data into the system correctly and at scale via traditional ETL (Extract, Transform, and Load) processes is a fundamental roadblock to being able to perform timely analytics or make real-time decisions. The best way to address this problem is to build a new architecture for ETL which takes advantage of the push-based nature of a stream processing system. We discuss the requirements for a streaming ETL engine and describe a generic architecture which satisfies those requirements. We also describe our implementation of streaming ETL using a scalable messaging system (Apache Kafka), a transactional stream processing system (S-Store), and a distributed polystore (Intel's BigDAWG), as well as propose a new time-series database optimized to handle ingestion internally

Microwave-assisted ammonia decomposition reaction over iron incorporated mesoporous carbon catalysts

Microwave-assisted ammonia decomposition reaction was investigated to produce COx free hydrogen, for fuel cell applications. Iron incorporated mesoporous carbon catalysts were prepared at different metal loadings, following an impregnation procedure. Mesoporous carbon acted as the catalyst support, as well as the microwave receptor. Complete conversion of ammonia was achieved at 450 degrees C over the catalyst having 7.7 wt% Fe, when the reaction was carried out in the microwave reactor system, using pure ammonia (GHSV of 36000 ml/h gut). However, in the case of using the conventionally heated reactor, complete conversion of ammonia was achieved only at 600 degrees C. Iron oxides, namely maghemite (gamma-Fe2O3), magnetite (Fe3O4) and hematite (alpha-Fe2O3) simultaneously appeared in the structure of the synthesized catalysts, after their calcination at 450 degrees C, under pure N-2 flow. Iron oxides present in the calcined catalytic materials then were reduced to metallic iron at 500 degrees C. Formation of iron carbide crystals was observed in the structure of spent catalysts that were used in microwave reactor system, while metallic iron crystals were still present in the catalysts that were tested in conventionally heated system