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The influence of different exercise intensities on kicking accuracy and velocity in soccer players

2007年

作者： Joaquim P. marques de Sá

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Journal of Sport and Health Science 2017年第4期6卷 462-467页

作者： Ricardo Ferraz Roland van den Tillar Mario C. marques Department of Sports Sciences University of Beira Interior Convento de St Antonio Covilha 6200-001 Portugal Research Center in Sport Sciences Health Sciences and Human Development CIDESD Vila Real 5000-801 Portugal Department of Teacher Education Nord Trondelag University College Levanger 7600 Norway

Purpose: The aim of this study was to investigate the influence of different exercise intensities induced by a soccer specific protocol on kicking performance in soccer ***: Twelve semi-professional male soccer players participated in this study and performed maximal instep kicks before and after the implementation of an exercise protocol to determine the influence of different intensities upon kicking ball velocity and the target-hitting ***: Analysis of variance designs with repeated measures showed that maximal ball velocity was affected only after the most intense circuit(F(6, 66) = 2.3; p = 0.041; η2= 0.18), while accuracy was not affected in the protocol(F(6, 66) = 0.19; p = 0.98; η2= 0.02). Low and moderate intensities did not affect accuracy or kicking ball ***: These findings suggest that kicking ball velocity is influenced by high-exercise intensities. Low and moderate exercise intensities do not affect the performance of the kick, and intensity does not influence accuracy. Otherwise, it is possible that other mechanisms(not only physiological) may influence players during the exercise.

关键词： Exercise intensity Fatigue Kicking soccer Pacing

Diversity of filamentous fungi in leaf litter and aerial litter in semideciduous forest,Bahia,Brazil

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Journal of Forestry Research 2015年第2期26卷 479-485页

作者： Marcos Fabio Oliveira marques Edemir Barbosa dos Santos Luis Fernando Pascholati Gusmaao Laborato rio de Biologia Molecular de Fungos Universidade do Estado da BahiaCampus VIIBr 407Km 127Rod.Lomanto JuoniorSenhor do BonfimBA 44230-000Brazil Laboratorio de Micologia (LAMIC) Universidade Estadual de Feira de SantanaCaixa Postal 252Feira de SantanaBA 44036-900Brazil

The fungi have wide distribution in ecosystems and can be found colonizing various substrates,where they act as efficient decomposers,participating in cycling of *** present study aimed to assess the diversity,richness and composition of filamentous fungi in leaf litter and aerial litter in a semi-deciduous forest in the Chapada Diamantina,Bahia,*** of leaf litter and aerial litter were collected monthly from October/2009 to September/2010 in eight installments in the studied *** samples were washed,placed in moist chambers and incubated.47 taxa were identified,37 in leaf litter and 35 in aerial litter,with 25 species common to both.A similarity of 69 % according to Sorensen *** similarity was considered low when the sample points were compared to the same *** fungi showed sporadic intervals.

关键词： Plant debris Species richness Tropical microfungi

Forest management for optimizing soil protection:a landscape-level approach

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Forest Ecosystems 2021年第4期8卷 672-684页

作者： Ana Raquel Rodrigues Susete marques Brigite Botequim Marco Marto Jose G.Borges Forest Research Centre and Laboratory TERRA School of AgricultureUniversity of LisbonTapada da Ajuda1349-017 LisbonPortugal

Background:Soil erosion is still identified as the main cause of land degradation worldwide,threatening soil functions and driving several research and policy efforts to reverse *** are commonly associated to some of the most successful land-use systems to achieve soil protection goals,but the extent to which forest ecosystems reduce erosion risks can largely depend on management decisions and associated silvicultural *** tools can assist foresters in solving the complex planning problem they face,concerning the demand for different,and often conflicting,ecosystem services.A resource capability model(RCM),based on a linear programming approach,was built and solved for a forest landscape management problem in Northwest Portugal,over a 90-years planning horizon,divided in 10-years ***:Timber provision and soil erosion were found to be in *** management alternatives included in the model were proven to be sufficiently flexible to obtain the desired level of timber yield,both in volume and even distribution along the planning horizon,while ensuring lower levels of soil loss estimates(below 35 Mg·ha^(−1)·year^(−1)).However,under climate change conditions,compatible with an increasing greenhouse gases emission scenario,potential landscape soil erosion may be enhanced up to 46 Mg·ha^(−1)·year^(−1) in critical ***:Soil conservation concerns in landscape-level forest management planning can be addressed by LPbased optimization *** providing an optimal management solution at landscape level,this approach enables a comprehensive analysis of the RCM,possible trade-offs and potential changes towards uncertainties.

关键词： Ecosystem services Erosion Optimization Silvicultural practices

The Role of Institutions:A Cross-country Analysis of Renminbi Trading in Foreign Exchange Markets

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China & World Economy 2022年第3期30卷 42-74页

作者： Marina Zucker-marques Pedro Perfeito da Silva Division on Globalization and Development Strategies United Nations Conference on Trade and Development(UNCTAD)Switzerland Political Science Department Central European UniversityAustria

We explore how China's geographically targeted policies impact RMB overseas use individually or in *** policies include swap agreements,clearing banks,investment quotas,and direct trading between Chinese renminbi(RMB)and non-USD *** a fuzzy-set qualitative comparative analysis and using Bank of International Settlements cross-country data on foreign exchange markets,we find that institution building has lowered the barriers to international adoption of the ***,for countries economically close to China,high RMB trading is explained by either(i)having a clearing bank in the host market and direct quotations between the RMB and the local currency,or(ii)being a financial center and having access to the Chinese capital *** combination of policies is explained by the creation of(i)"trading posts"that provide RMB liquidity abroad,and(ii)channels that allow actors to " recycle" offshore RMB *** triangulate our results with interviews conducted with senior People’s Bank of China officials.

关键词： foreign exchange markets fuzzy-set qualitative comparative analysis institutional context international monetary system offshore RMB trading RMB internationalization

A Comprehensive Survey on Fault Diagnosis and Fault Tolerance of DC-DC Converters

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Chinese Journal of Electrical Engineering 2018年第3期4卷 1-12页

作者： Fernando Bento Antonio J.marques Cardoso CISE-Electromechatronic Systems Research Centre Universidade da Beira InteriorCalcada Fonte do LameiroP-6201-001 CovilhaPortugal Department of Electromechanical Engineering Universidade da Beira InteriorCalcada Fonte do LameiroP-6201-001 CovilhaPortugal

DC-DC converters are becoming more commonly used in power conversion solutions for energy management purposes,being employed in an ever-increasing range of DC-based applications,such as LED lighting,electric vehicles,energy storage solutions,and consumer electronics(laptops,smartphones,etc.).In this context,efficiency and reliability are *** research efforts made in improving reliability of DC-DC converters are still quite narrow and ***,DC-DC converters take the shape of an endless number of topologies,with different functionalities and operation principles,thus complicating the task of improving reliability of all forms of DC-DC ***,compiling the information about the main failure modes,corresponding fault diagnostic algorithms and fault tolerance strategies developed so far,in a single document,becomes increasingly ***,this paper presents an up-to-date review of the recent achievements attained regarding the improvement of availability and reliability of DC-DC converters.

关键词： DC-DC converters fault diagnosis fault tolerance reliability

Narrow-band imaging without magnification for detecting early esophageal squamous cell carcinoma

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World Journal of Gastroenterology 2011年第39期17卷 4408-4413页

作者： Edson Ide Fauze Maluf-Filho Dalton marques Chaves Sergio Eiji Matuguma Paulo Sakai University of So Paulo Gastrointestinal Endoscopy Unit

AIM：To compare narrow-band imaging（NBI）without image magnification,and chromoendoscopy with Lugol＇s solution for detecting high-grade dysplasia and intramu-cosal esophageal squamous cell carcinoma（SCC）in patients with head and neck ***：This was a prospective observational study of 129 patients with primary head and neck tumors consecutively referred to the Gastrointestinal Endoscopy Unit of Hospital das Clínicas,Sao Paulo University Medical School,Brazil,between August 2006 and Feb-ruary *** examinations with NBI and Lugol chromoendoscopy were consecutively performed,and the discovered lesions were mapped,recorded and sent for *** results of the three methods were compared regarding sensitivity,specificity,accuracy,positive predictive value,negative predictive value,positive likelihood value and negative likelihood ***：Of the 129 patients,nine（7%）were diag-nosed with SCC,5 of which were in situ and 4 which were *** carcinomas were detected through NBI and Lugol *** 4 le-sions were diagnosed through conventional examination,all of which were larger than 10 ***：NBI technology with optical filters has high sensitivity and high negative predictive value for detecting superficial esophageal SCC,and produces results comparable to those obtained with 2.5%Lugol chromoendoscopy.

关键词： Gastrointestinal endoscopy Squamous cell carcinoma Esophageal neoplasms Diagnosis Lugol's solution

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In This Issue

General Psychiatry 2019年第6期32卷 293-294页

作者： Nicole J LeBlanc Luana marques Department of Psychiatry Massachusetts General Hospital Boston Massachusetts USA Harvard Medical School Boston Massachusetts USA

Despite ongoing research on the aetiology,phenomenology and treatment of anxiety disorders,these conditions continue to afflict myriads of individuals *** estimated 11.6%of the global population meets criteria for an anxiety disorder each year,1 and individuals with anxiety disorders experience both functional impairment2 and increased risk for physical health problems.3 In addition to the personal suffering associated with anxiety disorders,these conditions lead to considerable costs for society,including medical expenditures and lost work productivity.4 Moreover,although efficacious interventions for anxiety disorders are available,many individuals do not respond to these treatments5 or struggle to access evidence-based care.6 Thus,much work remains to be done to reduce the global burden of anxiety disorders.

关键词： impairment treatment etiology

Influence of variables related to soil weathering on the geomechanical performance of tropical soils

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第9期15卷 2423-2440页

作者： Rodrigo Cesar Pierozan Gregorio Luís Silva Araújo Ennio marques Palmeira Celso Romanel Department of Civil Engineering Federal Institute of EducationScienceand Technology of RondoniaPorto VelhoROBrazil Department of Civil and Environmental Engineering University of BrasiliaBrasiliaDFBrazil Department of Civil and Environmental Engineering Pontifical Catholic University of Rio de JaneiroRio de JaneiroRJBrazil

This paper presents an experimental and analytical investigation of the influence of variables related to soil weathering on the geomechanical performance of sand-silt mixtures containing lateritic soils,*** weathered tropical soils with the influence of interparticle *** sand-silt mixtures containing different relative proportions between uniform sand and lateritic soil were produced,and geomechanical soil characterization tests were *** on the results,a transition from a primarily coarse-to a fine-grained prevailing soil structure was found to cause considerable impact on the geomechanical performance of these soils,as evidenced by design variables related to soil mineralogy and size distribution ***,fines contents of both individual soil particles and soil aggregations were found to correlate with experimental results,while the relative proportion between sesquioxides(aluminum,and iron oxides),and silica,***-silica ratios(SSR^(-1)),facilitated estimates concerning changes in geomechanical ***,the application of the sandsilt mixtures containing lateritic soil on soil walls reinforced with polymeric strips was also evaluated,further emphasizing the potential advantages of adopting variables related to soil weathering on design guidelines concerning tropical soils.

关键词： Sesquioxides-silica ratio Tropical soils Sand-silt mixtures Lateritic soil Reinforced soil walls

Advances and New Applications Using the Acousto-Optic Effect in Optical Fibers

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Photonic Sensors 2013年第1期3卷 1-25页

作者： Alexandre A. P. POHL Roberson A. OLIVEIRA Ricardo E. DA SILVA carlos A. F. marques Paulo de Tarso NEVES JR. Kevin COOK John CANNING Rogério N. NOGUEIRA3 Advanced Telecommunications Laboratory Federal University of Technology - Paraná Curitiba Brazil Volvo GTT Advanced Technology & Research Curitiba Brazil Instituto de Telecomunicagōes P6lo de Aveiro 3810-193 Aveiro Portugal Interdisciplinary Photonics Labs School of Chemistry University of Sydney New South Wales 2006 Australia

This work presents a short review of the current research on the acousto-optic mechanism applied to optical fibers. The role of the piezoelectric element and the acousto-optic modulator in the excitation of flexural and longitudinal acoustic modes in the frequency range up to 1.2 MHz is highlighted. A combination of the finite elements and the transfer matrix methods is used to simulate the interaction of the waves with Bragg and long period gratings. Results show a very good agreement with experimental data. Recent applications such as the writing of gratings under the acoustic excitation and a novel viscometer sensor based on the acousto-optic mechanism are discussed.

关键词： Acousto-optics fiber gratings optical fibers optical sensors