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Media Systems and Communication Policies in Latin America proposes, tests and analyses the liberal captured model. It explores to what extent to which globalisation, marketization, commercialism, regional bodies and the nation State redefine the media's role in Latin American societies

The SISCOM (Smart Services for Information Systems and Communication Networks) research group focuses on technologies that make it possible to provide intelligent services for information services and communication networks. We teach and do research in topics related to privacy, performance evaluation of networks, wireless adhoc and mesh networks, design of routing protocols, among others. Our research activities are funded by public research projects granted by the Spanish Government and the European Commission. ; Peer Reviewed ; Postprint (published version)

Summary The aim of the article is to increase interest in the social systems theory of Niklas Luhmann among practicing social workers. The enigmatic statement from Luhmann that only 'communication can communicate' is explained with reference to his autopoietic systems theory which identifies three distinct types of systems: systems of communication, systems of life and systems of consciousness. The article proceeds to describe the meaning and nature of autopoietic systems before discussing the place of the individual in Luhmann's theory and how it is relevant for practicing social workers. The concepts of psychic systems, structural coupling and communicative codes are described and discussed. Findings The conceptual framework derived from Luhmann's systems theory is applied to a description of the social worker/client encounter. Communication in social work practice is polyphonic: it is structured by a hybrid of communicative codes which the practitioner must draw on depending on the auspices of the communicative context. The key conclusion of the article is that Luhmann retains a conception of the individual as an active agent in systems theory aiming 'noise' at the function systems with which the individual interacts. Applications The article suggests that the systems perspective presented provides social workers with a useful and nuanced framework for reflective practice because it makes the components of the practice system explicit and visible.

Cover -- Advances in Communication Technology and Systems -- Copyright Page -- Preface -- Contents -- Section 1: Information and communication engineering -- The design and implementation of water conservancy information system based on WebGIS -- A sparse channel estimation method for OFDM systems based on parametric channel modelling -- Classification method of sulfur print image based on characteristics of intensity histogram -- A new information system using multimedia thin client and cloud architecture -- A high throughput satellite communication system based on the complex field network coding -- Performance analysis of genetic algorithm based downlink MIMO channel capacity enhancement for distributed antenna relay system in indoor line of-sight Wi-Fi environment -- The modeling and implementation of the sensor data acquisition device of the fall detection system -- Marsden identity of partial Said-Ball curve -- Communication relay testing and validation of unmanned aerial vehicles -- An improved real-time positioning method of indoor navigation system based on IEEE 802.11 Wlan -- Detected moving target using four-impulse cancelation cooperated with staggered pulse repetition frequency dealing with blind speed -- Design and implementation of the GSM soft modem on android smart terminals -- Research on communication cable features real-time detection technology -- Study on the characteristics of wave propagation in conductivity exponential-time-varying media by finite-difference method -- Joint transmit antenna selection and precoding in multiuser distributed MIMO systems -- An enhanced CSMA/CA algorithm based on collision avoidance after CCA deference in IEEE802.15.4 for wireless sensor network -- The design of a low offset bandgap reference -- The research on ultra wideband communication channel model of MAV

Abstract
Both intersubjectivity and embodied cognitive processes are based on mechanisms for sharing actions, common to the species. The evolution of spoken language and of communication systems in general are good examples of this. In the present review, we propose that, by a process of observation and imitation, the sharing of object-directed actions (i.e., transitive arm/hand actions) and their pantomimes could have been used to progressively construct communication systems capable of representing action meaning (i.e., their goals). Starting from this process of observation and imitation, humans may have constructed progressively more complex communication systems based on iconic and symbolic arm gestures. These communication systems may have gradually been translated into more specific, buccal, gesture-based systems that gave rise to spoken language. In support of these hypotheses, we report evidence showing that the execution and observation of transitive actions and their pantomimes affects the production of phonological units. We describe the effects of the production and observation of symbolic gestures on word pronunciation. Finally, we report evidence that these systems relating gesture to speech have neural correlates in neural circuits located in the frontal cortex, understood to be involved in spoken language..

1 Introduction to mobile communications -- 1.1 Background -- 1.2 Mobile radio system fundamentals -- 1.3 A simple mobile radio system -- 1.4 Practical communication systems -- 1.5 Paging -- 1.6 Portables -- 1.7 Dialling systems -- 1.8 Radiophone services -- 1.9 Channel sharing -- 1.10 Area coverage techniques -- 1.11 Present and future use of mobile radio -- References -- 2 Multipath characteristics in urban areas -- 2.1 Introduction -- 2.2 The nature of multipath propagation -- 2.3 Short-term fading -- 2.4 Frequency-selective fading -- 2.5 Channel characterization -- 2.6 Channel sounding techniques -- 2.7 Practical channel sounders -- 2.8 Small-area characterization -- 2.9 Large-area characterization -- 2.10 Conclusions -- References -- 3 Propagation and signal strength prediction -- 3.1 Introduction -- 3.2 Fundamentals of VHF and UHF propagation -- 3.3 Propagation over terrain obstacles -- 3.4 Multiple knife-edge diffraction -- 3.5 Propagation prediction models -- 3.6 Signal strength prediction in urban areas -- 3.7 Discussion -- 3.8 Signal variability -- 3.9 Large area statistics -- 3.10 Building penetration losses -- References -- 4 Modulation techniques -- 4.1 Introduction -- 4.2 Amplitude modulation -- 4.3 Angle modulation -- 4.4 Implementation of AM systems -- 4.5 Single-sideband implementation -- 4.6 Demodulation -- 4.7 Generation of FM signals -- 4.8 FM demodulators -- 4.9 The effect of noise on AM systems -- 4.10 The effect of noise on FM systems -- 4.11 The effects of multipath propagation -- 4.12 Demodulation of data signals -- 4.13 Differentially encoded PSK (DPSK) -- 4.14 The effect of noise in data communication systems -- 4.15 Carrier transmissions -- 4.16 The influence of multipath fading on data transmissions -- 4.17 System performance -- 4.18 The fully digital approach -- References -- 5 Man-made noise -- 5.1 Introduction -- 5.2 Characterization of pulses -- 5.3 Characterization of impulsive noise -- 5.4 Measuring equipment -- 5.5 Practical measuring systems -- 5.6 Measurement of noise amplitude distribution -- 5.7 Statistical characterization of noise -- 5.8 Impulsive noise measurements -- 5.9 Summary -- 5.10 Performance prediction techniques -- References -- 6 Diversity reception -- 6.1 Introduction -- 6.2 Basic diversity methods -- 6.3 Improvements obtainable from diversity -- 6.4 Switched diversity -- 6.5 The effect of diversity on data systems -- 6.6 Practical diversity systems -- 6.7 Predetection diversity -- 6.8 Diversity systems using special receivers -- 6.9 Switched diversity -- 6.10 Comparison -- 6.11 Postdetection diversity -- 6.12 Time diversity -- 6.13 Discussion and conclusions -- References -- 7 Using the radio channel in cellular radio networkgs -- 7.1 The radio channel as a system component -- 7.2 Wideband versus narrowband -- 7.3 Cellular radio fundamentals -- 8 Analogue cellular radio systems -- 8.1 Channel structures -- 8.2 Specifications for the radio equipment -- 8.3 Network control activity -- 8.4 System operation -- 8.5 Some system comparisons -- 9 Digital cellular radio systems -- 9.1 Digital versus analogue for second-generation cellular systems -- 9.2 Choice of basic system architecture -- 9.3 Essential techniques for digital implementation -- 9.4 Example systems -- 9.5 Postscript.