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We have designed, fabricated and tested edge couplers for silicon photonics targeting industry-standard SMF-28 fibers. These edge couplers are based on a SiN inverse taper fabricated on a silicon-on-insulator (SOI) platform combined with an etch-based substrate removal process that prevents leakage of the expanded mode to the underlying silicon substrate. The measured couplers exhibited a 0.5 dB bandwidth...
Silicon nanowire (SNW) field-effect transistors (FETs) have proven an emerging highly sensitive bio/chemical sensor due to their huge surface-to-volume ratios. However, fabrication of SNWs with both high output and low cost is still challenging. This paper presents a new fabrication method using sidewall mask technology. By depositing a conformal thin film on a sacrificial pattern and removing the...
The inclusion of Information Communication Technologies (ICT) in education is something that has been working from different initiatives worldwide. Concern is on how these resources can enhance the teaching-learning process. Video games are an alternative, given that they present an opportunity to work on different themes in a motivating way. Children and young people can access the different contents...
Assembling is an essential part of the Learning Objects paradigm from its beginnings. There are currently many methodologies that are aimed at automating part or all the assembly process. In this paper, we present a case study in which a specific Learning Objects assembly methodology was applied. To carry out this process an Assembly System, called ELO-Tool, was used. The results obtained are analyzed...
This article addresses the use of Network Analysis Software to diagram arguments in Informal Logic classes. It is shown as an innovative possibility that goes beyond the classic work with pencil and paper and even the work with specific software dedicated to diagramming. In particular, diagrams made in pencil and paper and diagrams elaborated with Araucaria software are compared through the construction...
Computer programming is a key knowledge, not only in post-graduate programs related to computer sciences, but also in many others linked to engineering. In fact, it is becoming more common even from high school. However, one of the most usual problems for students is the difficulty in the understanding of algorithms, as well as determining their efficiencies. Considering this panorama, this research...
We present a simple device architecture enabled by an effective fabrication process to realize high-Q, ultra-compact microresonators with large free spectral ranges on silicon nitride at visible wavelengths. We demonstrate Qs >60 K for microdisks with radii as small as 2.5 μm.
This paper presents a method for assess the risk index in a power transformers park, risk index is a metric that allows park administrator to ensure an optimal physical asset management, allocating properly financial and human resources in operation and maintenance actions. Assessing risk index requires calculating two secondary sub-index termed failure probability and consequence factor. Those indexes...
In this work an analysis of the coordinated operation between the wind farm (WF) El Angelito and the hydroelectric power station Futaleufú, located in Chubut, Argentina, is carried out. With a power of 200MW, El Angelito would be the largest WF in the country. With this new generation, the elements of the system will not be able to handle both sources at nominal power. In particular, there would be...
This work presents a non parametric probabilistic mapping based on kernel estimators which does not use grids. The proposed methodology characterizes the map with a cloud of points obtained from several observations of the environment. In order to maintain a bounded number of observations in memory, a recursive subsampling algorithm is proposed. The procedure is included in an SLAM, in order to localize...
This work focuses on the study of an agricultural articulated vehicle which carries an implement (such as a plow or a harvester). The derivation of a mathematical model of its kinematics is presented, and then the methodology of model predictive control is used in order to have the implement follow a predefined trajectory. The performance of the system and the corresponding controller is ilustrated...
The security issue of using waste for the production of metallic silicon — silicon dust, ultra-fine material obtained in the process of gas purification furnaces, is interdisciplinary problem, because the resulting modifier is used in many industries. The use of silica dust also has broad opportunities to improve the strength properties of construction materials, in this regard, one of the most important...
In this work we show an approximation for the detection and false alarm probabilities of a differential detector with constant false alarm probability, applied to GNSS signal acquisition. Also, a novel performance metric is shown that we believe is an important parameter when designing efficient acquisition strategies for the implementation of GNSS receivers. The work allows for the conclusion that...
Companies deal with different problems that must be solved. Operations Research offers a methodology (SSM) that helps to identify their solutions. This project consisted in analyzing components of a real supermarket process in order to identify process improvements. SSM helped to find feasible improvements which were analyzed applying Agile Requirements.
The clustering of web resources is a significant and difficult task. In previous work has suggested ways to unify web information sources, trying to solve problems like heterogeneity of content, lack of structure, availability, distribution, quantity and quality. However, there are more complex than other domains where the solution is an even more cumbersome problem, due to the quantity and variety...
A new optical fiber probe based on in-line silicon microsphere cavity Fabry-Pérot interferometer (FPI) was demonstrated for refractive index sensing applications with a sensitivity about −5.326±0.223/RIU.
Cu/adhesive hybrid bonding is a promising technology to fabricate 3D integrated microsystems with ultra-fine pitch and short vertical interconnects, low electrical resistance, and high reliability. The main remaining issues of this technology include bonding temperature mismatch between Cu-Cu (350–400 °C) and adhesive (typically ≤250 °C), long thermal-compression time (low throughput), and high thermal...
In this study, core-shell structured SiO2@Ag submicro-sized spheres were prepared and used to improve the performance of the micro-sized silver flakes filled electrically conductive adhesive (ECA). The silica cores with an average diameter of 400 nm were prepared by hydrolysis and polycondensation of tetraethoxysilane using a modified Stöber process. The synthesis of compact silver shells on silica...
In recent years, the core-shell hybrid materials are one of the hotspots in current research and attracted widely attentions[1]. The hybrid particles have good conductivity, while the density and cost would be greatly reduced as compared with the pure silver powder. And the hybrid particles have applied in the electromagnetic shielding materials, conductive coatings and absorbing materials because...
We present an edge-light emitting diode based on highly doped Ge/Si μ-strips starined by a SiN top stressor. The device, manufactured in a BiCMOS pilot line, shows RT NIR electroluminescence in a spectral region extending from the C- to the U-telecom bands and beyond.
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