Search results for "Port performance"

showing 10 items of 33 documents

Rateless Codes Performance Analysis in Correlated Channel Model for GEO Free Space Optics Downlinks

2012

Settore ING-INF/03 - TelecomunicazioniFree Space Optics (FSO) technologies for satellite communications offer several advantages: wide bandwidth high rate capability immunity to electromagnetic interference and small equipment size. Thus they are suitable for inter-satellite links deep space communications and also for high data rate ground-to-satellite/satellite-to-ground communications. Nevertheless FSO links suffer impairments that cause power signal degradation at the receiver. Scattering and absorption cause power signal attenuations predictable by suitable deterministic models. Optical turbulence causes random irradiance fluctuations which can generate signal fading events and can thereby only be predicted by statistical models. Attenuation and fading events can corrupt FSO links and so it would be recommended to add mitigation error codes on the communication link. FSO channel can be described as an erasure channel: fading events can cause erasure errors. We have identified in rateless codes (RCs) a suitable solution to be employed in FSO links. RCs do not need feedback and they add a redundant coding on the source data that allows the receiver to recover the whole payload despite erasure errors. We implemented two different of rateless codes: Luby Transform (LT) and Raptor. We analyzed their performances on a simulated turbulent GEO FSO downlink (1 Gbps - OOK modulation) at a 106 μm wavelength and for different values of zenith angles. Assuming a plane-wave propagation and employing Hufnagel-Valley we modeled the downlink using: 1) a temporal correlated channel model based on Gamma-Gamma probability distribution and 2) an irradiance covariance function that we converted on a time function using Taylor frozen eddies hypothesis. Our new channel model is able to simulate irradiance fluctuations at different turbulence conditions as it will be shown in the full paper. We will also report performance results of LT and Raptor codes at overhead range varying between 0 and 50% and for different values of source packets.Settore ING-INF/01 - Elettronica
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The Contribution of Technological Change on EU's Exports

2013

Abstract The competitiveness of European countries is a constant concern in an environment dominated by the globalization of markets. Export competitiveness is an important dimension of a country's competitiveness. On top of that, in support to competitiveness, innovation is considered as a strong variable according to the Schumpeterian framework. This paper explores the relationship between technological change and international trade according to the OECD technological classification and the United Nations International System of Industrial Classification third revision for the 2 and 3 digit divisions of the manufacturing sector industry. An exploratory analysis is carried out on four Eur…

Stylized factTechnical Changebusiness.industryTechnological changeExport PerformanceInternational economicsInternational tradeExport performanceTechnical changeR&D intensityCompetitivenessGlobalizationEconomicsProduction (economics)media_common.cataloged_instanceGeneral Materials ScienceEuropean UnionEuropean unionbusinessInnovationmedia_commonR&D intensityProcedia - Social and Behavioral Sciences
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The Contribution of Technological Change on EU’s Exports Performance

2013

Technical Change:SOCIAL SCIENCES::Business and economics [Research Subject Categories]Export PerformanceEuropean UnionInnovationR&D intensityCompetitiveness
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Toward an urban transport sustainability index: an European comparison

2011

Introduction The aim of paper is to cluster policies of sustainable mobility in order to define an essential set of specific Transport Performance Indicators (TPI). TPIs are standardized measures suitable for analysis in order to appraise the feasibility of a transport policy or an infrastructural project. Data collection of TPIs is a crucial phase, but data detection and monitoring are not standardized at the city level. Thus, there is no a standard for data collection and storing, this aspect makes much difficult to compare different city contexts. This issue is critical and bounds the analysis of built scenarios. A standardized set of transport performance indicators becomes, hence, esse…

Transportation planningData collectionComputer scienceTransport performance indicators Transport sustainability index Urban sustainable mobilityMechanical EngineeringTransportationEnvironmental economicsPolicy analysisTransport engineeringSet (abstract data type)Environmental Sustainability IndexSustainable transportSettore ICAR/05 - TrasportiAutomotive EngineeringPerformance measurementPerformance indicatorEuropean Transport Research Review
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Are Female Performances in Other Olympic Distance Running Events Equivalent to Paula Radcliffe's?

2015

[SDV.MHEP.PHY] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO]Female performanceSport performancePaula RadcliffeRunning
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INNOVATION AS A KEY FACTOR IN THE INTERNATIONAL COMPETITIVENESS OF THE EUROPEAN UNION

2013

There is international scientific consensus that economic progress will be driven by innovation, namely the invention and application of new technologies. Research and Development (R&D) is one category of spending that develops and drives these new technologies. From the perspective of competiveness, private sector firms are prone to focus their R&D on “applied” projects and many government-sponsored technological advances have been instrumental in driving economic growth and rising living standards. According to the published literature, it is expected that countries engaging in R&D activities have a comparative advantage in export of products, and countries with the “largest” R&D expendit…

business.industryEmerging technologiesInternational tradeStandard of livingPrivate sectorExport performanceCompetitive advantageEconomicsmedia_common.cataloged_instanceScientific consensusEuropean unionbusinessIndustrial organizationComparative advantagemedia_commonEuropean Integration Studies
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Effects of an experimental short-time high-intensity warm-up on explosive muscle strength performance in soccer players: A pilot study.

2022

Objective: This study aimed to evaluate the effects of an experimental short-time warm-up consisting of a small number of intermittent high-intensity sprints on explosive muscle strength performance in soccer players and to identify recovery times after performing the sprints. Furthermore, we evaluated the reliability of a smartphone app in jumping performance.Methods: Twenty male soccer players were given the following tests: 1) the counter-movement jump (CMJ) test with the Microgate system, 2) the counter-movement jump (CMJ) test with the MyJump smartphone app, and 3) the handgrip strength test. The experimental short-time high-intensity warm-up was carried out 1 week after test administr…

handgrip strengthvertical jump heightPhysiologyPhysiology (medical)sport performancejumping performancestrengthwarm-upsoccerFrontiers in physiology
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Mood, Burnout, and Dispositional Optimism in Kayak Polo Players During Their Competitive Stage.

2021

© 2021. This manuscript version is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by/4.0/ This document is the Accepted Manuscript version of a Published Work that appeared in final form in Frontiers in Psychology. To access the final edited and published work see 10.3389/fpsyg.2021.667603 The main objective of performance sport is to obtain achievements at the highest level through the adequate development of the athlete. The scientific literature demonstrates the fundamental role played by the inclusion of certain psychological variables in the training plan. This study examined the psychological profile of kayak polo players through the variables of burnou…

media_common.quotation_subjectDispositional optimismBurnoutpsychological variablesLOT-R03 medical and health sciences0302 clinical medicineOptimismsport performanceTraining planPsychology0501 psychology and cognitive sciencesPOMSSenioritykayakEmotional exhaustionGeneral Psychologymedia_commonOriginal ResearchtrainingbiologyAthletes05 social sciences030229 sport scienceskayak polobiology.organism_classificationBF1-990050106 general psychology & cognitive sciencesMood:1 - Filosofía y psicología::159.9 - Psicología [CDU]IBD-RPsychologyClinical psychologyFrontiers in psychology
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Occlusal Splints and Exercise Performance: A Systematic Review of Current Evidence

2021

The role of the dento-mandibular apparatus and, in particular, occlusion and jaw position, received increased attention during last years. In the present study, we aimed to systematically review, on the light of the new potential insights, the published literature covering the occlusal splint (OS) applications, and its impact on exercise performance. A structured search was carried out including MEDLINE®/PubMed and Scopus databases with additional integration from external sources, between March and June 2021. To meet the inclusion criteria, studies published in the English language, involving humans in vivo, published from 2000 to 2021 and that investigated the role of occlusal splints on …

medicine.medical_specialtyHealth Toxicology and Mutagenesismedicine.medical_treatmentEnglish languageocclusionMandibleOral healthOcclusal SplintsPhysical medicine and rehabilitationExercise performanceOcclusionmedicinesport performanceHumansExercisebiologybusiness.industryAthletesPublic Health Environmental and Occupational HealthExplosive strengthROcclusal Splintsmouthguardsbiology.organism_classificationAthletesMedicineSystematic ReviewbusinessSplint (medicine)International Journal of Environmental Research and Public Health
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Kinematics of Cervical Spine during Rowing Ergometer at Different Stroke Rates in Young Rowers: A Pilot Study

2022

Background: Research on biomechanics in rowing has mostly focused on the lumbar spine. However, injuries can also affect other body segments. Thus, the aim of this pilot study was to explore any potential variations in the kinematics of the cervical spine during two different stroke rates on the rowing ergometer in young rowers. Methods: Twelve young rowers of regional or national level were recruited for the study. The experimental protocol consisted of two separate test sessions (i.e., a sequence of 10 consecutive strokes for each test session) at different stroke rates (i.e., 20 and 30 strokes/min) on an indoor rowing ergometer. Kinematics of the cervical spine was assessed using an iner…

musculoskeletal diseasesLumbar VertebraerowingErgometryHealth Toxicology and MutagenesisPublic Health Environmental and Occupational HealthPilot Projectscervical range of motionAthletic PerformancebiomechanicsBiomechanical Phenomenarange of motioncervical mobilityjoint mobility; range of motion; biomechanics; kinematics; sport performance; cervical mobility; cervical range of motion; rowing; stroke cycle; stroke ratekinematicsCervical Vertebraesport performancestroke cyclejoint mobilitystroke rateWater SportsInternational Journal of Environmental Research and Public Health
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