Thiago Nunes - Academia.edu (original) (raw)

Papers by Thiago Nunes

Corrosion Science, 2010

Novel LDH-based nanocontainers of corrosion inhibitor are developed in the present work. The rese... more Novel LDH-based nanocontainers of corrosion inhibitor are developed in the present work. The reservoirs are composed by nanostructured layered double Mg/Al and Zn/Al hydroxides with divanadate anions located in the interlayer regions. The nanocrystalline LDHs (layered double hydroxides) are able to release vanadate ions in a controllable way.

Journal of Magnetic Resonance, Series A, 1995

Journal of Magnetic Resonance, Series A, 1995

... 1995) COMMUNICATIONS NMR Imaging of Paramagnetic Solids in the High-Field-Gradient Approximat... more ... 1995) COMMUNICATIONS NMR Imaging of Paramagnetic Solids in the High-Field-Gradient Approximation with the STRAFI Method EW Randall,* AA SAMOiLENKO ... the signal from the copper salt has been lost, followed, in (C), by the phosphate resonance (and the glue, on the ...

Journal of Magnetic Resonance, Series A, 1995

Journal of Aerosol Science, 1992

Thirteen ambient aerosol samples were collected with a cascade impactor and analysed for mass, wa... more Thirteen ambient aerosol samples were collected with a cascade impactor and analysed for mass, water soluble ions and trace elements. The experimental data was inverted and continuous size distribution curves obtained. The majority of aerosol constituents have a bi-modal size distribution with geometric mean diameters in the ranges 0.15-0.35 ~tm and 2.5-4.5 lam. The specific analysis of each sample permits to obtain insight into the origins and production or transformation mechanisms for the aerosol components in the industrial and coastal atmospheres.

... Alexis Cabeda HP Brazil R & D Porto Alegre, Brazil alexis.cabeda@... more ... Alexis Cabeda HP Brazil R & D Porto Alegre, Brazil alexis.cabeda@hp.com Luiz Gustavo Fernandes GMAP - PPGCC - PUCRS Porto Alegre, Brazil luiz.fernandes@pucrs.br ABSTRACT Digital presses have consistently improved their speed in the past ten years. ...

Abstract—The creation of personalized documents has become a common practice on digital printing ... more Abstract—The creation of personalized documents has become a common practice on digital printing area in the past few years. In order to deal with the growing demand, Print Shops Providers (PSPs) need to be able to print a large amount of documents in a short period of time. ...

High volume print jobs are getting more common due to the growing demand for personalized documen... more High volume print jobs are getting more common due to the growing demand for personalized documents. In this context, Variable Data Printing (VDP) has become a useful tool for marketers who need to customize messages for each customer in promotion materials or marketing campaigns.

Journal of Computer Applications in Technology, 2005

Int. J. Computer Applications and Technology, Vol. 22, No. 1, 2005 ... Isabel H. Manssour* and Lu... more Int. J. Computer Applications and Technology, Vol. 22, No. 1, 2005 ... Isabel H. Manssour* and Luiz Gustavo Fernandes Faculdade de Informática, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga, 6681, Prédio 30, Bloco 4, 90.619-900, Porto Alegre, RS, ...

Computer Science - Research and Development

Digital presses have consistently improved their speed in the past ten years. Meanwhile, the need... more Digital presses have consistently improved their speed in the past ten years. Meanwhile, the need for document personalization and customization has increased. As a consequence of these two facts, the traditional RIP (Raster Image Processing) process has become a highly demanding computational step in the print workflow. Print Service Providers (PSP) are now using multiple RIP engines and parallelization strategies to speed up the whole ripping process which is currently based on a per-page basis. Nevertheless, these strategies are not optimized in terms of ensuring the best Return On Investment (ROI) for the RIP engines. Depending on the input document jobs characteristics, the ripping step may not achieve the print-engine speed creating a unwanted bottleneck. The aim of this paper is to present a way to improve the ROI of PSPs proposing a profiling strategy which enables the optimal usage of RIPs for specific jobs features ensuring that jobs are always consumed at least at engine speed. The profiling strategy is based on a per-page analysis of input Portable Document Format (PDF) jobs identifying their key components. This work introduces a PDF Profiler tool aimed at extracting information from jobs and some metrics to predict a job ripping cost based on its profile. This information is extremely useful to rasterize jobs in a clever way. The computational cost estimated using the information extracted by the PDF Profiler and the proposed metrics is useful for the print jobs queue management to improve the allocated RIPs load balance, resulting in a higher throughput for the ripping step. Experiments have been carried out in order to evaluate the PDF Profiler, the proposed metrics and their impact in the print jobs queue management.

The use of personalized documents has become a helpful practice on the digital printing area. Aut... more The use of personalized documents has become a helpful practice on the digital printing area. Automatic procedures to create and transform these documents have become necessary to deal with the growing market demand. Languages such as XSL-FO (eXtensible Stylesheet Language-Formatting Objects) and PPML (Personalized Print Markup Language) have been developed to facilitate the way variable content is inserted within a document. However, these languages have brought together an increasing computational cost of those documents rendering process. Considering that printing shops need to render jobs with thousands of personalized documents within a short period of time, high performance techniques appear as an interesting alternative to improve this rendering process throughput. In this work, we present improvements and new results of a MPI solution previously developed for the FOP (Formatting Objects Processor) tool. FOP is the Apache project rendering tool for personalized documents and its parallel version was optimized in order to allow the computation in parallel of larger input jobs composed of thousands of personalized documents.

Estas notas apresentam, de forma sumária, o estudo da resposta no tempo dos sistemas de primeira ... more Estas notas apresentam, de forma sumária, o estudo da resposta no tempo dos sistemas de primeira e de segunda ordem só com pólos. De um modo geral apresentam-se apenas os resultados, sem as respectivas derivações (que, na grande maioria dos casos, são muito simples).

Corrosion Science, 2010

Novel LDH-based nanocontainers of corrosion inhibitor are developed in the present work. The rese... more Novel LDH-based nanocontainers of corrosion inhibitor are developed in the present work. The reservoirs are composed by nanostructured layered double Mg/Al and Zn/Al hydroxides with divanadate anions located in the interlayer regions. The nanocrystalline LDHs (layered double hydroxides) are able to release vanadate ions in a controllable way.

Journal of Magnetic Resonance, Series A, 1995

Journal of Magnetic Resonance, Series A, 1995

... 1995) COMMUNICATIONS NMR Imaging of Paramagnetic Solids in the High-Field-Gradient Approximat... more ... 1995) COMMUNICATIONS NMR Imaging of Paramagnetic Solids in the High-Field-Gradient Approximation with the STRAFI Method EW Randall,* AA SAMOiLENKO ... the signal from the copper salt has been lost, followed, in (C), by the phosphate resonance (and the glue, on the ...

Journal of Magnetic Resonance, Series A, 1995

Journal of Aerosol Science, 1992

Thirteen ambient aerosol samples were collected with a cascade impactor and analysed for mass, wa... more Thirteen ambient aerosol samples were collected with a cascade impactor and analysed for mass, water soluble ions and trace elements. The experimental data was inverted and continuous size distribution curves obtained. The majority of aerosol constituents have a bi-modal size distribution with geometric mean diameters in the ranges 0.15-0.35 ~tm and 2.5-4.5 lam. The specific analysis of each sample permits to obtain insight into the origins and production or transformation mechanisms for the aerosol components in the industrial and coastal atmospheres.

... Alexis Cabeda HP Brazil R & D Porto Alegre, Brazil alexis.cabeda@... more ... Alexis Cabeda HP Brazil R & D Porto Alegre, Brazil alexis.cabeda@hp.com Luiz Gustavo Fernandes GMAP - PPGCC - PUCRS Porto Alegre, Brazil luiz.fernandes@pucrs.br ABSTRACT Digital presses have consistently improved their speed in the past ten years. ...

Abstract—The creation of personalized documents has become a common practice on digital printing ... more Abstract—The creation of personalized documents has become a common practice on digital printing area in the past few years. In order to deal with the growing demand, Print Shops Providers (PSPs) need to be able to print a large amount of documents in a short period of time. ...

High volume print jobs are getting more common due to the growing demand for personalized documen... more High volume print jobs are getting more common due to the growing demand for personalized documents. In this context, Variable Data Printing (VDP) has become a useful tool for marketers who need to customize messages for each customer in promotion materials or marketing campaigns.

Journal of Computer Applications in Technology, 2005

Int. J. Computer Applications and Technology, Vol. 22, No. 1, 2005 ... Isabel H. Manssour* and Lu... more Int. J. Computer Applications and Technology, Vol. 22, No. 1, 2005 ... Isabel H. Manssour* and Luiz Gustavo Fernandes Faculdade de Informática, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga, 6681, Prédio 30, Bloco 4, 90.619-900, Porto Alegre, RS, ...

Computer Science - Research and Development

Digital presses have consistently improved their speed in the past ten years. Meanwhile, the need... more Digital presses have consistently improved their speed in the past ten years. Meanwhile, the need for document personalization and customization has increased. As a consequence of these two facts, the traditional RIP (Raster Image Processing) process has become a highly demanding computational step in the print workflow. Print Service Providers (PSP) are now using multiple RIP engines and parallelization strategies to speed up the whole ripping process which is currently based on a per-page basis. Nevertheless, these strategies are not optimized in terms of ensuring the best Return On Investment (ROI) for the RIP engines. Depending on the input document jobs characteristics, the ripping step may not achieve the print-engine speed creating a unwanted bottleneck. The aim of this paper is to present a way to improve the ROI of PSPs proposing a profiling strategy which enables the optimal usage of RIPs for specific jobs features ensuring that jobs are always consumed at least at engine speed. The profiling strategy is based on a per-page analysis of input Portable Document Format (PDF) jobs identifying their key components. This work introduces a PDF Profiler tool aimed at extracting information from jobs and some metrics to predict a job ripping cost based on its profile. This information is extremely useful to rasterize jobs in a clever way. The computational cost estimated using the information extracted by the PDF Profiler and the proposed metrics is useful for the print jobs queue management to improve the allocated RIPs load balance, resulting in a higher throughput for the ripping step. Experiments have been carried out in order to evaluate the PDF Profiler, the proposed metrics and their impact in the print jobs queue management.

The use of personalized documents has become a helpful practice on the digital printing area. Aut... more The use of personalized documents has become a helpful practice on the digital printing area. Automatic procedures to create and transform these documents have become necessary to deal with the growing market demand. Languages such as XSL-FO (eXtensible Stylesheet Language-Formatting Objects) and PPML (Personalized Print Markup Language) have been developed to facilitate the way variable content is inserted within a document. However, these languages have brought together an increasing computational cost of those documents rendering process. Considering that printing shops need to render jobs with thousands of personalized documents within a short period of time, high performance techniques appear as an interesting alternative to improve this rendering process throughput. In this work, we present improvements and new results of a MPI solution previously developed for the FOP (Formatting Objects Processor) tool. FOP is the Apache project rendering tool for personalized documents and its parallel version was optimized in order to allow the computation in parallel of larger input jobs composed of thousands of personalized documents.

Estas notas apresentam, de forma sumária, o estudo da resposta no tempo dos sistemas de primeira ... more Estas notas apresentam, de forma sumária, o estudo da resposta no tempo dos sistemas de primeira e de segunda ordem só com pólos. De um modo geral apresentam-se apenas os resultados, sem as respectivas derivações (que, na grande maioria dos casos, são muito simples).