Search results for "Telecommunication"
showing 10 items of 1769 documents
Holocene interaction of maritime and continental climate in Central Europe: New speleothem evidence from Central Germany
2019
Central European climate is strongly influenced by North Atlantic (Westerlies) and Siberian High circulation patterns, which govern precipitation and temperature dynamics and induce heterogeneous climatic conditions, with distinct boundaries between climate zones. These climate boundaries are not stationary and shift geographically, depending on long-term atmospheric conditions. So far, little is known about past shifts of these climate boundaries and the local to regional environmental response prior to the instrumental era.\ud \ud High resolution multi-proxy data (stable oxygen and carbon isotope ratios, S/Ca and Sr/Ca) from two Holocene stalagmites from Bleßberg Cave (Thuringia) are used…
Automated Soil Moisture Monitoring Wireless Sensor Network for Long-Term Cal/Val Applications
2012
The design and development of a wireless sensor network for soil moisture measurement in an unlevelled 10 km × 10 km area, is described. It was specifically deployed for the characterization of a reference area, in campaigns of calibration and validation of the space mission SMOS (Soil Moisture and Ocean Salinity), but the system is easily extensible to monitor other climatic or environmental variables, as well as to other regions of ecological interest. The network consists of a number of automatic measurement stations, strategically placed following soil homogeneity and land uses criteria. Every station includes acquisition, conditioning and communication systems. The electronics are batt…
“Come join us, and lose your accent!” : Accent Modification Courses as Hierarchization of International Student
2021
In this article, we examine the hierarchization of international students by bringing together perspectives of linguistic legitimacy and language ideologies. Our data stems from 26 accent reduction (AR) or accent modification (AM) course descriptions and websites from US universities. Based on their analysis, we discuss the socio-political implications of the phenomenon of these courses for international students and the ways in which language-based, particularly accent-based, arguments are used to create or reinforce different categories of students. We argue that while international students are presented as having different kinds of “comprehensibility problems” that AM/AR courses are cla…
Dynamic Ordering of Firewall Rules Using a Novel Swapping Window-based Paradigm
2016
Designing and implementing efficient firewall strategies in the age of the Internet of Things (IoT) is far from trivial. This is because, as time proceeds, an increasing number of devices will be connected, accessed and controlled on the Internet. Additionally, an ever-increasingly amount of sensitive information will be stored on various networks. A good and effi- cient firewall strategy will attempt to secure this information, and to also manage the large amount of inevitable network traffic that these devices create. The goal of this paper is to propose a framework for designing optimized firewalls for the IoT. This paper deals with two fundamental challenges/problems encountered in such…
Stochastic discretized learning-based weak estimation: a novel estimation method for non-stationary environments
2016
The task of designing estimators that are able to track time-varying distributions has found promising applications in many real-life problems.Existing approaches resort to sliding windows that track changes by discarding old observations. In this paper, we report a novel estimator referred to as the Stochastic Discretized Weak Estimator (SDWE), that is based on the principles of discretized Learning Automata (LA). In brief, the estimator is able to estimate the parameters of a time varying binomial distribution using finite memory. The estimator tracks changes in the distribution by operating a controlled random walk in a discretized probability space. The steps of the estimator are discre…
Distributed learning automata for solving a classification task
2016
In this paper, we propose a novel classifier in two-dimensional feature spaces based on the theory of Learning Automata (LA). The essence of our scheme is to search for a separator in the feature space by imposing a LA based random walk in a grid system. To each node in the gird we attach an LA, whose actions are the choice of the edges forming the separator. The walk is self-enclosing, i.e, a new random walk is started whenever the walker returns to starting node forming a closed classification path yielding a many edged polygon. In our approach, the different LA attached at the different nodes search for a polygon that best encircles and separates each class. Based on the obtained polygon…
A Survey on Sensors for Autonomous Systems
2020
This paper presents a survey on state-of-the-art sensors for autonomous systems. The key performance parameters along with the operating principle of sensors used in autonomous systems are thoroughly explored. Practical aspects such as performance parameters, sensor output data format, sensor interfaces, size, power consumption, compatible hardware platforms, data analysis, and signal processing complexities are summarized. Such information serves as a practical guide for designing smart sensing systems for autonomous systems.
The measurement of light transmission through an irradiated fluidised bed
1983
Abstract The transmission of light through an irradiated fluidised bed with vertical flat walls containing catalytic particles has been experimentally studied. The amount of light transmitted through the reactor was measured at different levels by a photocell. The experimental variables studied included: (i) gas flow rate, varying from 2 to more than 10 times that required for minimum fluidisation; (ii) mean particle size, ranging from 0.138 to 0.275 mm; and (iii) internal bed thickness from 2.1 to 4.9 mm. The effect of the reflectance of the particles was also examined. Results show that the amount of light transmitted through a flat fluidised bed is low. The average transmitted light has …
Los parámetros que identifican el subtitulado para sordos: análisis y clasificación
2012
En los últimos años ha aumentado la presión social a favor de la accesibilidad audiovisual, lo que ha venido acompañado de un incremento en el número de productos subtitulados para sordos disponibles en el mercado. El significativo crecimiento en el número de estudios ha cuestionado la aplicación sistemática de los parámetros generales del subtitulado a la práctica del Subtitulado para Sordos (SPS). Partiendo de una propuesta de Bartoll (2008) para el estudio de los parámetros del subtitulado, el presente artículo plantea la adaptación de la taxonomía al estudio del SPS. Analizando los parámetros de naturaleza general aplicables al SPS, incorporando aquellos parámetros exclusivos de esta mo…
La transposición creativa de Volpone de J. Romain y M. Tourneur
2016
We are well aware that, no matter how valuable a text may be, its afterlife in other cultural and linguistic contexts is heavily dependent on the translator’s ability to meet the needs and expectations of its target audience. This is precisely what French screenwriter Jules Romains and film director Maurice Tourneur did when adapting Jonson’s Volpone [1940] for the new medium at the advent of sound films. It is the aim of this article to cast light on their creative transposition of Ben Jonson’s theatrical masterpiece. Keywords : Romains; Tourneur; Volpone ; creative transposition