Instituto Nacional Of Tecnologia Industrial

San Martín, Argentina

Instituto Nacional Of Tecnologia Industrial

San Martín, Argentina
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Galizzi G.E.,Institute Fisica Rosario | Federico A.,Instituto Nacional Of Tecnologia Industrial | Kaufmann G.H.,Institute Fisica Rosario
Applied Optics | Year: 2017

We test the performance of a phase recovery method based on a three-dimensional directional wavelet transform applied to the intensity signal measured by temporal speckle pattern interferometry (TSPI). We present and discuss several sources of uncertainty by analyzing experimental datasets recorded for an in-plane interferometer without introducing a temporal carrier. The dynamic phase data measured with the proposed method are compared with those obtained from the well-known one-dimensional Fourier transform phase recovery technique. In the Fourier method, the filtered Fourier transform for each intensity pixel is evaluated along the temporal direction. In contrast, the three-dimensional directional wavelet transform method uses the information of adjacent pixels and then increases the performance of the recovered dynamic phase results. The advantages and limitations of the three-dimensional directional wavelet transform approach are discussed, and a summary of conclusions from the analysis of TSPI data is also given. © 2017 Optical Society of America.

Bierzychudek M.E.,Instituto Nacional Of Tecnologia Industrial | Jones G.R.,U.S. National Institute of Standards and Technology | Elmquist R.E.,U.S. National Institute of Standards and Technology
Review of Scientific Instruments | Year: 2014

We describe a cryogenic two-terminal high-resistance bridge and its application in precision resistance scaling from the quantized Hall resistance (QHR) at RH = RK/2 = 12 906.4035 Ω to decade resistance standards with values between 1 MΩ and 1 GΩ. The design minimizes lead resistance errors with multiterminal connections to the QHR device. A single variable voltage source and resistive ratio windings are utilized to achieve excellent dynamic stability, which is not readily obtained in low-current measurements with conventional cryogenic current comparators (CCCs). Prototypes of this bridge have been verified by a successful international comparison of high-resistance scaling using two-terminal CCCs in the national metrology institutes of Argentina, Mexico, and the United States. © 2014 AIP Publishing LLC.

Agency: European Commission | Branch: FP7 | Program: CP-FP-SICA | Phase: KBBE.2011.2.5-02 | Award Amount: 3.97M | Year: 2012

Food security is a major concern for all countries in the face of population increase and diminishing energy and water supplies. Over one billion people in low and middle income countries suffer from malnutrition. To meet the UN Millennium Development Goals to eradicate hunger and poverty, it is essential to reduce post harvest losses, including in the fisheries sector. The overall objectives of SECUREFISH are to strengthen capacity in low cost technology; to improve the preservation of existing fish supplies; to utilise waste and bycatch to produce value-added products; to develop an integrated quality management tool and finally to test the developed technology and quality management tool in different real third country conditions. There are six work packages (WP). WP1 will ensure the efficient management of the project. WP2 will develop low cost innovative processing tools based on traditional technology for preserving fish including a solar tunnel drier, a modified solar assisted extruder and fast freezing/ continuous atmosphere freeze-drier (CAFD). In WP3, underutilised bycatch and waste by-products of fish processing will be recovered and converted to high value products. WP4 will develop an effective total quality management tool (safety and risk assessment; HACCP quality cost and traceability, nutritional and eating quality and carbon footprint) of three fish product chains (solar dried, extruded and frozen/CAFD) which will be tailored to suit local needs. The technological advances (WP2) and quality management tool (WP4) will be evaluated in the three fish product chain case studies in Africa (Kenya, Namibia, Ghana), Asia (India and Malaysia) and Latin America (Argentina) to include different economic, cultural and social conditions. The case studies involve stakeholders including SMEs to ensure sustained implementation of project results. WP6 details a strategy for education, training and dissemination to widely promote the results and guidelines.

Agency: European Commission | Branch: FP7 | Program: CP-FP-SICA | Phase: NMP.2011.2.3-1 | Award Amount: 4.15M | Year: 2012

The EU fruit juice and nectars market stood at a healthy 11.3 billion litres in 2009. A 60% of total volume consumed is packaged with carton, a 25% with PET and the remainder is packaged with glass (13%) and other packaging formats (2%).Environmental sustainability concerns are rising on the public agenda, becoming even more relevant to the consumers.The EU juice and nectars industry is aware of its important role and responsibility, making use of best practice which involves full LCA to reduce both carbon and water footprint. Juices and nectars producers have sought to provide the most environmentally friendly packaging available.Meanwhile, packaging innovations is getting ahead of developments in recycling.It is illogical that VAT as high as 20% to 25% can be applied to packaged fruit juice.There is a need to join efforts between packaging companies, recycling operators and governments to maximise the latest technology. The use of conventional polymeric materials petrochemical based in packaging, represents an important environmental impact and waste generation due to their non-biodegradability. Some alternative materials obtained from renewable resources can be found in the market. These materials fulfil the environmental concerns but they show some limitations in terms of performance like processing by injection and thermal resistance joined to high associated costs. This situation makes necessary research to improve their added value. The aim of PHBOTTLE project is to develop a new BOTTLE (body, cap & sleeve) from biodegradable material, concretely PHB, which will be obtained by fermentation of wastewater from juice processing industries (renewable biogenic resource); optimising eco and energy efficiency in the material production and processing. The new bottle will be used for juice packaging with a competitive price, although other applications will be also studied (non-food packaging such as cosmetics and non-packaging applications)

Valentini C.,Instituto Nacional Of Tecnologia Industrial | Fiora J.,Instituto Nacional Of Tecnologia Industrial | Ybarra G.,Instituto Nacional Of Tecnologia Industrial
Progress in Organic Coatings | Year: 2012

The protective performance of epoxy coatings on mild steel immersed in 3.5% NaCl solutions was evaluated by means of electrochemical noise analysis and electrochemical impedance spectroscopy (EIS). Current and voltage noise were recorded and the standard deviations of the potential, current and noise resistance were calculated. Additionally, the spectral noise resistance (R SN) was obtained from the harmonic analysis of the noise data. Finally, EIS measurements were carried out and the data fitted with an equivalent circuit from which the polarization resistance was obtained. Resistance parameters obtained by both techniques were found to be in good agreement. A set of parameters obtained from electrochemical noise measurement is proposed to be used for the assessment of the performance of protective coatings. © 2011 Elsevier B.V. All rights reserved.

Wielgus M.,Institute of Micromechanics and Photonics | Patorski K.,Institute of Micromechanics and Photonics | Etchepareborda P.,Instituto Nacional Of Tecnologia Industrial | Federico A.,Instituto Nacional Of Tecnologia Industrial
Optics Express | Year: 2014

We introduce the algorithm for the direct phase estimation from the single noisy interferometric pattern. The method, named implicit smoothing spline (ISS), can be regarded as a formal generalization of the smoothing spline interpolation for the case when the interpolated data is given implicitly. We derive the necessary equations, discuss the properties of the method and address its application for the direct estimation of the continuous phase in both classical interferometry and digital speckle pattern interferometry (DSPI). The numerical illustrations of the algorithm performance are provided to corroborate the high quality of the results. © 2014 Optical Society of America.

Bernini M.B.,Institute Fisica Rosario | Federico A.,Instituto Nacional Of Tecnologia Industrial | Kaufmann G.H.,Institute Fisica Rosario | Kaufmann G.H.,Centro Internacional Franco Argentino Of Ciencias Of La Informacion Y Of Sistemas
Applied Optics | Year: 2011

We propose a phase measurement technique to retrieve optical phase distributions coded in noisy temporal speckle pattern interferometry signals presenting regions of adjacent low-modulated pixels, which is based on the bidimensional empirical mode decomposition and the Hilbert transform. It is shown that this approach can effectively remove noise and minimize the influence of large sets of adjacent nonmodulated pixels located in the time series of speckle interferograms. The performance of the phase retrieval approach is analyzed using computer-simulated speckle interferograms modulated with a temporal carrier. The results are also compared with those given by a technique based on the one-dimensional empirical mode decomposition. The advantages and limitations of the proposed approach are finally discussed. © 2011 Optical Society of America.

Etchepareborda P.,Instituto Nacional Of Tecnologia Industrial | Vadnjal A.L.,Instituto Nacional Of Tecnologia Industrial | Federico A.,Instituto Nacional Of Tecnologia Industrial | Kaufmann G.H.,Institute Fisica Rosario
Optics Letters | Year: 2012

We evaluate the extension of the exact nonlinear reconstruction technique developed for digital holography to the phase-recovery problems presented by other optical interferometric methods, which use carrier modulation. It is shown that the introduction of an analytic wavelet analysis in the ridge of the cepstrum transformation corresponding to the analyzed interferogram can be closely related to the well-known wavelet analysis of the interferometric intensity. Subsequently, the phase-recovery process is improved. The advantages and limitations of this framework are analyzed and discussed using numerical simulations in singular scalar light fields and in temporal speckle pattern interferometry. © 2012 Optical Society of America.

Vadnjal A.L.,Instituto Nacional Of Tecnologia Industrial | Etchepareborda P.,Instituto Nacional Of Tecnologia Industrial | Federico A.,Instituto Nacional Of Tecnologia Industrial | Kaufmann G.H.,CONICET
Applied Optics | Year: 2013

We present a method to determine micro and nano in-plane displacements based on the phase singularities generated by application of directional wavelet transforms to speckle pattern images. The spatial distribution of the obtained phase singularities by the wavelet transform configures a network, which is characterized by two quasi-orthogonal directions. The displacement value is determined by identifying the intersection points of the network before and after the displacement produced by the tested object. The performance of this method is evaluated using simulated speckle patterns and experimental data. The proposed approach is compared with the optical vortex metrology and digital image correlation methods in terms of performance and noise robustness, and the advantages and limitations associated to each method are also discussed. © 2013 Optical Society of America.

Abate G.,Instituto Nacional Of Tecnologia Industrial
PANACM 2015 - 1st Pan-American Congress on Computational Mechanics, in conjunction with the 11th Argentine Congress on Computational Mechanics, MECOM 2015 | Year: 2015

Through of an extensive background research on the application of numerical simulation forging process, we have found that works is mainly aimed at: analyze and resolve defects [1]; improve the design of the toolkit used in forming [2,3]; predicting the microstructure of the material in the different phases of forging process [4]; microforming simulation [4]; die wear evaluation [5]; or determining lateral forces in forging dies with close warped surfaces [6]. The National Institute of Industrial Technology, through the Forging Group from INTIMecánica, has proposed to collaborate by introducing the use of this technology in local industries, considering the context in which they operate. Consequently, in this work of industrial application, were analyzed using FEM software named Simufact. Forming, possible improvements about process of hot forging of a piece, that not requiring investment in machinery or in die design, and not increase production times. To achieve this, an automotive piece was selected from various evaluated cases, basically for two reasons: because it had an excessive flash material, and the volume of production was significant for those who produced it. Firstly, was reproduced the process as was usually the company done by simulation. Although, we worked on various improvement alternatives, especially on the size and shape of the starting material. With a simple modification, the proposed process, produced a material savings estimated at 1,8 t / year. This modification will become an economical benefit to the company, such as for the production of several thousand additional pieces with the same quantity of material. This improvement was obtained without additional investment. Finally, the results obtained from the numerical simulation were positively confirmed by experimental tests on the forging plant floor.

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