Search results for "Merging"
showing 10 items of 649 documents
Layout influence on microwave performance of graphene field effect transistors
2018
The authors report on an in-depth statistical and parametrical investigation on the microwave performance of graphene FETs on sapphire substrate. The devices differ for the gate-drain/source distance and for the gate length, having kept instead the gate width constant. Microwave S -parameters have been measured for the different devices. Their results demonstrate that the cut-off frequency does not monotonically increase with the scaling of the device geometry and that it exists an optimal region in the gate-drain/source and gate-length space which maximises the microwave performance.
Citizens’ perceptions in relation to transport systems and infrastructures: a nationwide study in the dominican republic
2021
One of the challenges currently faced by emerging countries is to get their citizens to decide to use sustainable transport for their regular trips, in order to reduce the current vehicular pollution rates. The objective of this descriptive research is to examine the perceptions of Dominicans regarding the state of the country’s transport systems and road infrastructure. For this purpose, a nationwide survey procedure was performed. This cross-sectional research used the data retrieved from a sample of 1260 citizens aged over 18, proportional in gender, age, habitat, and province of the Dominican Republic. The results showed how Dominicans believe that, compared to other road features, pede…
Could telemedicine enhance traditional medicine practices?
2014
International audience; In developing countries, telemedicine and mobile health tools promise to enhance access to high-quality healthcare, to support communication of medical information and to assist pharmacovigilance processes. In this article, we provide some arguments on the potential of telemedicine and mobile health (mHealth) applications to improve the delivery of health care in rural African regions. Specifically, the development of mobile telemedicine could help to lay the foundations of a healthcare approach integrating modern medical knowledge with ancient medical practices on the African continent. Access to information and communication technology (ICT), technical devices or p…
Supervised learning of time-independent Hamiltonians for gate design
2018
We present a general framework to tackle the problem of finding time-independent dynamics generating target unitary evolutions. We show that this problem is equivalently stated as a set of conditions over the spectrum of the time-independent gate generator, thus transforming the task to an inverse eigenvalue problem. We illustrate our methodology by identifying suitable time-independent generators implementing Toffoli and Fredkin gates without the need for ancillae or effective evolutions. We show how the same conditions can be used to solve the problem numerically, via supervised learning techniques. In turn, this allows us to solve problems that are not amenable, in general, to direct ana…
Approximate supervised learning of quantum gates via ancillary qubits
2018
We present strategies for the training of a qubit network aimed at the ancilla-assisted synthesis of multi-qubit gates based on a set of restricted resources. By assuming the availability of only time-independent single and two-qubit interactions, we introduce and describe a supervised learning strategy implemented through momentum-stochastic gradient descent with automatic differentiation methods. We demonstrate the effectiveness of the scheme by discussing the implementation of non-trivial three qubit operations, including a Quantum Fourier Transform (QFT) and a half-adder gate.
Programa de revisión de vida apoyado en las nuevas tecnologías para las personas mayores: Una aplicación de tecnologías positivas
2010
Existe una importante prevalencia de sintomatología depresiva en la población de la tercera edad. Sin embargo, pocas personas mayores reciben tratamiento adecuados para este tipo de dolencias. Entre las opciones terapéuticas disponibles figura la técnica de Revisión de Vida (RV). El objetivo de este artículo es presentar un programa de terapia para personas mayores basado en la técnica de Revisión de Vida a través de las nuevas tecnologías. El programa terapéutico se encuentra implantado en una plataforma tecnológica de e-salud (Sistema Mayordomo) y se enfoca en el entrenamiento de la recuperación de recuerdos autobiográficos específicos positivos. La herramienta tecnológica se dirige a enr…
Time-varying conditional correlation : effect on international portfolio diversification in Southeast Asia
2017
Tämä tutkimus tarkastelee USA:n ja valittujen Kaakkois-Aasian kehittyvien maiden markkinoita; Philippiinejä, Indonesiaa, Malesiaa ja Thaimaata. Tutkimus antaa tuloksia sekä USA:n että indonesialaisen sijoittajan näkökulmasta. Merkittävä rooli tutkimuksessa on ajassa muuttuvan korrelaation havainnollistamisessa osakeindeksien välillä käyttäen apuna Englen vuonna 2002 esittelemää DCC-GARCH mallia. Tutkimuksessa käytetty data on vuodesta 1988 vuoteen 2015 saakka. Tulokset paljastavat kuinka valittujen osakemarkkinoiden välinen korrelaatio on muuttunut kolmen kriisin - Aasian kriisin, teknologiakuplan ja globaali talouskriisin - myötä ja onko muutos ollut pysyvää vai ei. Lisäksi tutkimuksessa t…
A Compact SPICE Model for Organic TFTs and Applications to Logic Circuit Design
2016
This work introduces a compact DC model developed for organic thin film transistors (OTFTs) and its SPICE implementation. The model relies on a modified version of the gradual channel approximation that takes into account the contact effects, occurring at nonohmic metal/organic semiconductor junctions, modeling them as reverse biased Schottky diodes. The model also comprises channel length modulation and scalability of drain current with respect to channel length. To show the suitability of the model, we used it to design an inverter and a ring oscillator circuit. Furthermore, an experimental validation of the OTFTs has been done at the level of the single device as well as with a discrete-…
Current challenges and perspectives in gas fluxes biotreatment
2020
Abstract Nowadays, there is a wide variety of bioreactor configurations to treat specific pollutants from gas streams; however, biotechnologies share benchmark aspects that are herein described. In this chapter, the reader is introduced to the biological gas treatment field by means of a historical overview on how the initial devices used for gas treatment evolved to the innovative systems that are currently applied worldwide. The technical and operational fundamentals of biofilters, biotrickling filters, bioscrubbers, and emerging technologies such as two-phase partitioning bioreactors, multistage systems, and membranes are included. Perspectives and key research niches in the field are al…
State of the art about use of IoT in education
2018
Every day the devices connected autonomously to the communication networks are increased. New applications arise for this type of interconnected objects, thus offering new alternatives for solutions of any kind, through the use of technology based on ubiquitous computing. That is why this work is inspired by these new technologies for its application in the educational field, with the purpose of contributing to the imposition of the use of IoT as a tool1 in the classroom.