Концепції мовної гри як теоретичні засади організації навчально-ігрової діяльності

У статті розглянуто лінгвофілософські й лінгвістичні концепції мовної гри як підґрунтя організації навчально-ігрової діяльності в системі українськомовної освіти. На основі наукового осмислення окреслено зміст понять "гра", "навчально-ігрова діяльність", "мовна гра". Шляхом аналізу наукової літератури й синтезу теоретичних ідей визначено принципи побудови й реалізації навчально-методичної системи, спрямованої на формування мовної особистості школяра в навчально-ігровій діяльності

Green communications by demand shaping and User-in-the-Loop tariff-based control

Abstract—The new field of green communications can be divided into a) energy-efficient communications equipment or b) using information and communication technology to improve the world to become more energy aware. Mobile data traffic and utility energy consumption have a lot in common. There is a limited supply due to limited resources, and only growth (of quantities, technology) can increase this, at the cost of a higher carbon footprint. The green index is defined here for cellular wireless. On the other hand there is a demand which is user-generated, variable over time and space, and ever increasing at a fast pace. Flat rates or almost flat utility tariffs have spoiled users and established high user expectations. Instead of engineering for the growth of supply, this paper investigates how to engineer for controlling the demand side. Dealing with congestion is a consequence of the supply=demand regime and the end of overprovisioning. New tariffs are required that are tailored to the major QoS classes and help to shape demand at the user and application level. This paper investigates QoS-aware demand shaping and control by user-in-the-loop and tariff-based control. Index Terms—Demand shaping, user-in-the-loop (UIL), congestion, tariff, flow control, green index, sustainability, cross-layer I

Energy efficient radio resource management in a coordinated multi-cell distributed antenna system

As well as the demand for higher data rates goes on, the rising energy costs and environmental concerns have also led researchers to increase energy efficiency in terms of bits-per-Joule. Cooperative communications with low power nodes, switching off under-utilized cells due to low traffic load and energy efficient radio resource management are some of the energy saving methods. It is observed that the conventional energy efficiency expression, which is defined as the ratio of the data rate to the total transmission power, can limit the system throughput significantly. In this paper, we introduce a novel energy efficiency expression which provides a trade-off between sum-rate maximization and total transmission power minimization in the network. A coordinated multi-cell distribut

First survey results of quantified user behavior in user-in-the-loop scenarios for sustainable wireless networks

Traffic in mobile radio networks is expected to continue to increase by 100% per year. This imposes a big challenge for future generations (4G and 5G) of access technologies which were previously dimensioned for over-provisioning esp

Generalized coordinated port selection in a multi-cell distributed antenna system using semidefinite relaxation

The downlink of a coordinated multi-cell distributed antenna system is considered. In [1], coordinated port selection was shown to achieve significant performance gains. However, in the system considered therein, the ports in each cell were constrained to transmit only to user terminals (UTs) in that cell. In this work, we consider a generalization of the problem considered in [1] by alleviating this constraint. We formulate the problem of determining the ports that maximize the minimum signal to interference plus noise ratio observed by the UTs as a binary-constrained optimization problem. Observing that it is NP-hard, we propose a semidefinite relaxation and Gaussian randomization based technique to obtain close-to-optimal solutions. Our simulation results show that the performance achieved by the proposed technique approaches that of the optimal solution. It is also shown that the proposed technique outperforms the one in [1], particularly for cell-edge UTs, albeit with an increased computational complexity

Space Weather Studies Of Ionolab Group

IONOLAB is an interdisciplinary research group dedicated for handling the challenges of near earth environment on communication, positioning and remote sensing systems. IONOLAB group contributes to the space weather studies by developing state-of-the-art analysis and imaging techniques. On the website of IONOLAB group, www.ionolab.org, four unique space weather services, namely, IONOLAB-TEC, IRI-PLAS-2015, IRI-PLAS-MAP and IRI-PLAS-STEC, are provided in a user friendly graphical interface unit. Newly developed algorithm for ionospheric tomography, IONOLAB-CIT, provides not only 3-D electron density but also tracking of ionospheric state with high reliability and fidelity. The algorithm for ray tracing through ionosphere, IONOLAB-RAY, provides a simulation environment in all communication bands. The background ionosphere is generated in voxels where IRI-Plas electron density is used to obtain refractive index. One unique feature is the possible update of ionospheric state by insertion of Total Electron Content (TEC) values into IRI-Plas. Both ordinary and extraordinary paths can be traced with high ray and low ray scenarios for any desired date, time and transmitter location. 2-D regional interpolation and mapping algorithm, IONOLAB-MAP, is another tool of IONOLAB group where automatic TEC maps with Kriging algorithm are generated from GPS network with high spatio-temporal resolution. IONOLAB group continues its studies in all aspects of ionospheric and plasmaspheric signal propagation, imaging and mapping.Wo