Search results for "Radio"
showing 10 items of 8895 documents
Influences of muscle, fat and hormones on bone development in women : a cross-sectional and longitudinal study spanning three generations
2011
Bezvadu datu pārraides radio līniju plānošanas rīks
2016
Šis dokuments ir kvalifikācijas darbs, kas satur izstrādātā bezvadu datu pārraides radio līniju plānošanas rīka dokumentāciju, kas sevī ietver programmatūras prasību specifikāciju, programmatūras projektējuma aprakstu, testēšanas dokumentāciju un pirmkoda fragmentus. Bezvadu datu pārraides radio līniju plānošanas rīka mērķis ir ļaut uzņēmuma “SAF Tehnika” klientiem veikt radio līniju plānošanu veicot signāla kvalitātes aprēķinus izmantojot datus par uzņēmuma ražotajām bezvadu datu pārraides iekārtām.
On the evaluation of an optical OFDM radio over FSO system with IM-DD for high-speed indoor communications
2017
En aquest article es proposa un nou sistema híbrid de ràdio sobre fibra (RoF) i òptica d’espai lliure (FSO) basat en la transmissió de senyals òptics OFDM (OOFDM) per proporcionar enllaços de comunicació sense fils òptics d’alta capacitat. Es proposa un esquema de transmissió de baix cost basat en IM-DD per simplificar i reutilitzar la infraestructura existent per desplegar un enllaç FSO d’alt ample de banda. Aquest article mostra els resultats experimentals basats en la implementació de l'esquema proposat sota una transmissió digital OOFDM de 16 QAM a través de 10 km de fibra monomode (SMF) i enllaç FSO de 300 mm. Els resultats mostren la viabilitat de desplegar un sistema de comunicació d…
High Bias Voltage CZT Detectors for High-flux Measurements
2017
In this work, we present the performance of new travelling heater method (THM) grown CZT detectors, recently developed at IMEM-CNR Parma, Italy. Thick planar detectors (3 mm thick) with gold electroless contacts on CZT crystals grown by Redlen Technologies (Victoria BC, Canada) were realized, with a planar cathode covering the detector surface (4.1 x 4.1 mm(2)) and a central anode (2 x 2 mm(2)) surrounded by a guard ring electrode. The detectors, characterized by low leakage currents at room temperature (4.7 nA/cm(2) at 1000 V/cm), allow good room temperature operation even at high bias voltages (> 7000 V/cm). At low rates, the detectors exhibit an energy resolution around 4 % FWIEM at 59.5…
Microscale X-ray mapping of CZT arrays: Spatial dependence of amplitude, shape and multiplicity of detector pulses
2018
In this work, we present the results of a microscale X-ray mapping of a 2 mm thick CZT pixel detector, with pixel pitches of 500 μm and 250 μm, using collimated synchrotron X-ray sources at the Diamond Light source (U. K.). The detector is dc coupled to a fast and low noise ASIC (PIXIE ASIC), characterized only by the preamplifier stage. A custom 16-channel digital readout electronics was used, able to perform online fast pulse shape and height analysis (PSHA), with low dead time and reasonable energy resolution at both low and high fluxes. The detector allows high bias voltage operation (> 5000 V/cm) and good energy resolution at room temperature (5.3 %, 2.3 % and 2.1 % FWHM at 22.1, 59…
Radiation engineered polymer nanocarriers for a new generation of nanoparticles based tumor specific radiopharmaceuticals
2013
Radioteorian alkuvaiheita Weimarin tasavallasta sodan ajan Yhdysvaltoihin : Bertolt Brecht ja Theodor Adorno
2018
Healthy mistrust or complacent confidence? : Civic vigilance in the reporting by leading newspapers on nuclear waste disposal in Finland and France
2021
Trust and confidence have been identified as crucial for efforts at solving the conundrum of high-level radioactive waste management (RWM). However, mistrust has its virtues, especially in the form of “civic vigilance”—healthy suspicion towards the powers that be. This article examines civic vigilance in the form of “watchdog journalism,” as practiced by the leading Finnish and French newspapers—Helsingin Sanomat (HS) and Le Monde (LM)—in their RWM reporting. Although both countries are forerunners in RWM, Finland constitutes a Nordic “high-trust society” while France has been characterized as a “society of mistrust.” Employing the methods of frame analysis, key RWM-related news frames were…
Voices from the past: memory and desire in Marina Warner’s radio play Brigit’s Cell
2020
This article examines Marina Warner’s radio play Birgitta’s Cell (BBC Radio 4), later published as Brigit’s Cell (2010) focusing on the themes of memory and desire. By drawing on Jan Assman’s theories on collective memory, the article shows how the two time levels Warner builds in the radio drama succeed in creating a fresh connection between women in the past and in the present as well as between individual and collective experience. The analysis of Warner’s work focuses on the dramatization of the story, taking into account the results offered by the use of the spoken word, fragments of dialogues, interior monologues, silences, enhanced, by its initial destination for the radio.
Analysis of MAC-level throughput in LTE systems with link rate adaptation and HARQ protocols
2015
LTE is rapidly gaining momentum for building future 4G cellular systems, and real operational networks are under deployment worldwide. To achieve high throughput performance, in addition to an advanced physical layer design LTE exploits a combination of sophisticated mechanisms at the radio resource management layer. Clearly, this makes difficult to develop analytical tools to accurately assess and optimise the user perceived throughput under realistic channel assumptions. Thus, most existing studies focus only on link-layer throughput or consider individual mechanisms in isolation. The main contribution of this paper is a unified modelling framework of the MAC-level downlink throughput of …