Vasquez E.G.,Polytechnic School |
Carvalho L.F.B.,IVIG |
Leite da Fonseca I.C.,IVIG |
Vasconcelos de Freitas M.A.,IVIG |
Pinguelli Rosa L.,IVIG
WIT Transactions on Ecology and the Environment | Year: 2012
In order to adapt densely packed cities to climate change, there is a pressing need for the adoption of techniques that contribute to the sustainability of constructions and, therefore, of the cities themselves, so that they become more appropriate places to enable their citizens to live and work. Indeed, adopting techniques for greening built-up environments and making use of non-energyintensive construction technologies has proven to be an environmentally friendly and energetically efficient alternative, enhancing the micro-climate of adapted buildings and the meso-climate of the built up environment, creating ecologically appropriate alternatives for renewal of areas vulnerable to degradation and the expansion of sustainable newly constructed areas. In this context, with the support of the Rio de Janeiro State Research Funding Agency (FAPERJ), a practical experiment is currently underway at the Federal University of Rio de Janeiro (UFRJ) involving the application of naturation. This is a practical experiment that consists of applying vegetation to constructed surfaces using the COMPEC brick, which is comprised of organic and inorganic matter derived from solid urban waste. The aim is to evaluate energy and thermal comfort aspects by measuring the potential for energy conservation and efficiency gains when compared with conventional building materials. At present, 3 prototypes measuring 25m2 each are being built with conventional and ecological materials: Prototype 1 (slab covering made of concrete and walls made of ceramic brick), Prototype 2 (slab covering made of concrete and walls made of COMPEC bricks) and Prototype 3 (slab covering naturated and walls made of ceramic bricks), into which heat-sensing equipment will be installed internally. The methodology of this experiment calls for monitoring the thermal behavior of the materials employed, analyzing and comparing each prototype, as well as calculating the greenhouse gas emissions of the materials employed. The purpose of all this is to see whether the resulting data corroborates the hypothesis that it is possible to improve the thermal comfort of buildings via the application of naturation, as well as to reduce greenhouse gas emissions by using and recycling solid urban waste. © 2012 WIT Press.
Leceta I.,University of the Basque Country |
Guerrero P.,University of the Basque Country |
Cabezudo S.,Polytechnic School |
De La Caba K.,University of the Basque Country
Journal of Cleaner Production | Year: 2013
A comparative environmental assessment between two different food packaging systems was carried out: a commercial food packaging film based on polypropylene (PP) and a new biodegradable chitosanbased film developed in our labs. The environmental load of chitosan-based films in different life cycle stages was studied and compared with the one of conventional PP films currently used as food packaging. The functional unit in this study was 1 m2 of packaging film. The studied system includes three main stages: material extraction, film manufacture, and end of life. Results showed that PP films have higher impact than chitosan-based films in carcinogens and in fossil fuels impact categories. The environmental burden associated to carcinogens is mainly due to the end of life stage, while the impact related to fossil fuels is owing to the extraction of PP. On the contrary, chitosan-based films have higher environmental load in respiratory inorganics, land use, and minerals categories. Environmental load associated to respiratory inorganics is mostly related to the acetic acid used in the film manufacture and, in a more significant way, to the hydrochloric acid used in the raw material extraction, which is also responsible for the impact in minerals category. In addition, the main responsible for the impact in land use category is glycerine, considered as a by-product from biodiesel, used in the film manufacture stage. © 2012 Elsevier Ltd. All rights reserved.
Maidl A.M.,Polytechnic School |
Mascarenhas F.,Federal University of Rio de Janeiro |
Medeiros S.,Federal University of Rio Grande do Norte |
Ierusalimschy R.,Pontifical Catholic University of Rio de Janeiro
Science of Computer Programming | Year: 2016
Parsing Expression Grammars (PEGs) describe top-down parsers. Unfortunately, the error-reporting techniques used in conventional top-down parsers do not directly apply to parsers based on Parsing Expression Grammars (PEGs), so they have to be somehow simulated. While the PEG formalism has no account of semantic actions, actual PEG implementations add them, and we show how to simulate an error-reporting heuristic through these semantic actions. We also propose a complementary error reporting strategy that may lead to better error messages: labeled failures. This approach is inspired by exception handling of programming languages, and lets a PEG define different kinds of failure, with each ordered choice operator specifying which kinds it catches. Labeled failures give a way to annotate grammars for better error reporting, to express some of the error reporting strategies used by deterministic parser combinators, and to encode predictive top-down parsing in a PEG. © 2016 Elsevier B.V.
Georget E.,Aix - Marseille University |
Diaby F.,Polytechnic School |
Abdeddaim R.,Aix - Marseille University |
Sabouroux P.,Aix - Marseille University
8th European Conference on Antennas and Propagation, EuCAP 2014 | Year: 2014
This A multiple configuration of segmented coaxial cell is presented to measure the electromagnetic characteristics of different states of materials. These measurements are possible thanks to a sample holder. The processing of measurement is based on a well-known method, the reflection/transmission method. In this paper, we present a result for solid, flexible material, granular material and liquid. © 2014 European Association on Antennas and Propagation.
Batygin K.,California Institute of Technology |
Brown M.E.,California Institute of Technology |
Betts H.,Polytechnic School
Astrophysical Journal Letters | Year: 2012
Over the last decade, evidence has mounted that the solar system's observed state can be favorably reproduced in the context of an instability-driven dynamical evolution model, such as the "Nice" model. To date, all successful realizations of instability models have concentrated on evolving the four giant planets onto their current orbits from a more compact configuration. Simultaneously, the possibility of forming and ejecting additional planets has been discussed, but never successfully implemented. Here we show that a large array of five-planet (two gas giants + three ice giants) multi-resonant initial states can lead to an adequate formation of the outer solar system, featuring an ejection of an ice giant during a phase of instability. Particularly, our simulations demonstrate that the eigenmodes that characterize the outer solar system's secular dynamics can be closely matched with a five-planet model. Furthermore, provided that the ejection timescale of the extra planet is short, orbital excitation of a primordial cold classical Kuiper Belt can also be avoided in this scenario. Thus, the solar system is one of many possible outcomes of dynamical relaxation and can originate from a wide variety of initial states. This deems the construction of a unique model of solar system's early dynamical evolution impossible. © 2012. The American Astronomical Society. All rights reserved.
Dawsey A.C.,University of Southern California |
Hathaway K.L.,Polytechnic School |
Kim S.,Polytechnic School |
Williams T.J.,University of Southern California
Journal of Chemical Education | Year: 2013
Dotarem and Magnevist, two clinically available magnetic resonance imaging (MRI) contrast agents, were assessed in a high school science classroom with respect to which is the better contrast agent. Magnevist, the more efficacious contrast agent, has negative side effects because its gadolinium center can escape from its ligand. However, Dotarem, though a less efficacious contrast agent, is a safer drug choice. After the experiment, students are confronted with the FDA warning on Magnevist, which enabled a discussion of drug efficacy versus safety. We describe a laboratory experiment in which NMR spin lattice relaxation rate measurements are used to quantify the relaxivities of the active ingredients of Dotarem and Magnevist. The spin lattice relaxation rate gives the average amount of time it takes the excited nucleus to relax back to the original state. Students learn by constructing molar relaxivity curves based on inversion recovery data sets that Magnevist is more relaxive than Dotarem. This experiment is suitable for any analytical chemistry laboratory with access to NMR. © 2013 The American Chemical Society and Division of Chemical Education, Inc.
Grouni S.,University of Boumerdès |
Ibtiouen R.,Polytechnic School |
Kidouche M.,University of Boumerdès |
Touhami O.,Polytechnic School
Advanced Techniques in Computing Sciences and Software Engineering | Year: 2010
The rotor flux optimization is crucial parameter in the implementation of the field oriented control. In this paper, we considered the problem of finding optimum flux reference that minimizes the total energy control for induction machine drive under practical constraints: voltage and current. The practical usefulness of this method is evaluated and confirmed through experiments using (1.5kW/380V) induction machine. Simulations and experimental investigation tests are provided to evaluate the consistency and performance of the proposed control model scheme. © Springer Science+Business Media B.V. 2010.
Mohan N.,California Institute of Technology |
Cheng J.,Polytechnic School |
Greer J.R.,California Institute of Technology |
Needleman A.,University of North Texas
Journal of Applied Mechanics, Transactions ASME | Year: 2013
Motivated by a model that qualitatively captured the response of vertically aligned carbon nanotube (VACNT) pillars in uniaxial compression, we consider the uniaxial tensile response of a class of compressible elastic-viscoplastic solids. In Hutchens et al. ["Analysis of Uniaxial Compression of Vertically Aligned Carbon Nanotubes," J. Mech. Phys. Solids, 59, pp. 2227-2237 (2011), Erratum 60, 1753-1756 (2012)] an elastic viscoplastic constitutive relation with plastic compressibility, plastic non-normality, and a hardening-softeninghardening hardness function was used to model experimentally obtained uniaxial compression data of cylindrical VACNT micropillars. Complex deformation modes were found in uniaxial compression, which include a sequential buckling-like collapse of the type seen in experiments. These complex deformation modes led to the overall stress-strain signature of the pillar not being of the same form as the input material hardness function. A fundamental question that motivates exploring the deformation of this class of materials-both experimentally and theoretically-is how to extract the intrinsic material response from simple tests. In this study we explore the relation between the input material response and the overall stress strain behavior in uniaxial tension using the constitutive framework of Hutchens et al. A simple one-dimensional analysis reveals the types of instability modes to be expected. Dynamic, finite deformation finite element calculations are carried out to explore the dependence of diffuse necking, localized necking, and propagating band deformation modes on characteristics of the hardness function. Attention is devoted to uncovering implications for obtaining intrinsic material properties of complex hierarchical structures; for example, vertically aligned carbon nanotubes (VACNTs), from uniaxial tension experiments. Copyright © 2013 by ASME.
Nunes R.T.S.,Federal University of Rio de Janeiro |
Prodanoff J.H.A.,Polytechnic School |
Nunes B.,Aston University |
Freitas M.A.V.,Federal University of Rio de Janeiro
WIT Transactions on Ecology and the Environment | Year: 2012
In recent decades, a number of sustainable strategies and polices have been created to protect and preserve our water environments from the impacts of growing communities. The Australian approach, Water Sensitive Urban Design (WSUD), defined as the integration of urban planning and design with the urban water cycle management, has made considerable advances on design guidelines since 2000. WSUD stormwater management systems (e.g. wetlands, bioretentions, porous pavement etc), also known as Best Management Practices (BMPs) or Low Impact Development (LID), are slowly gaining popularity across Australia, the USA and Europe. There have also been significant improvements in how to model the performance of the WSUD technologies (e.g. MUSIC software). However, the implementation issues of these WSUD practices are mainly related to ongoing institutional capacity. Some of the key problems are associated with a limited awareness of urban planners and designers; in general, they have very little knowledge of these systems and their benefits to the urban environments. At the same time, hydrological engineers should have a better understanding of building codes and master plans. The land use regulations are equally as important as the physical site conditions for determining opportunities and constraints for implementing WSUD techniques. There is a need for procedures that can make a better linkage between urban planners and WSUD engineering practices. Thus, this paper aims to present the development of a general framework for incorporating WSUD technologies into the site planning process. The study was applied to lot-scale in the Melbourne region, Australia. Results show the potential space available for fitting WSUD elements, according to building requirements and different types of housing densities. © 2011 WIT Press.
News Article | February 16, 2017
AUCKLAND, NEW ZEALAND, February 16, 2017-- Kerry Sutton has been included in Marquis Who's Who. As in all Marquis Who's Who biographical volumes, individuals profiled are selected on the basis of current reference value. Factors such as position, noteworthy accomplishments, visibility, and prominence in a field are all taken into account during the selection process.With a diploma in industrial design from the prestigious Wellington Polytechnic School in New Zealand, Mr. Sutton has been sharing his creativity and innovation as a designer since establishing his career in 1968. Successful due to his imaginative and persistent desire to create new ideas about product design, he admits that he has progressed by specializing in a number of product categories rather than remaining focused on just one, as many other industrial designers do. A unique interest in Feng Shui led Mr. Sutton to design the I-Ching Lucky Chime and the I-Ching Incense Burner. Creating the concept for these items and seeing them come to life in the marketplace were the highlights of his career, he noted.To enhance his skills, Mr. Sutton pursued coursework at the Art Center College of Design in Los Angeles, Calif. and continues to affiliate with a number of industry organizations in art and design. In recognition of professional excellence, he has been selected for inclusion in Who's Who in the World every year since 1998. As he looks to the future, Mr. Sutton intends to continue working as an industrial designer in the Auckland region.About Marquis Who's Who :Since 1899, when A. N. Marquis printed the First Edition of Who's Who in America , Marquis Who's Who has chronicled the lives of the most accomplished individuals and innovators from every significant field of endeavor, including politics, business, medicine, law, education, art, religion and entertainment. Today, Who's Who in America remains an essential biographical source for thousands of researchers, journalists, librarians and executive search firms around the world. Marquis now publishes many Who's Who titles, including Who's Who in America , Who's Who in the World , Who's Who in American Law , Who's Who in Medicine and Healthcare , Who's Who in Science and Engineering , and Who's Who in Asia . Marquis publications may be visited at the official Marquis Who's Who website at www.marquiswhoswho.com