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Relação entre economia de corrida e variáveis biomecânicas em corredores fundistas; Relationship between running economy and biomechanical variables in distance runners

Tartaruga, Marcus Peikriswili
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
46.16%
O objetivo do presente estudo foi analisar o comportamento de 15 variáveis cinemáticas (tempo de passada, tempo de suporte, tempo de balanço, comprimento de passada, comprimento de passada relativo, freqüência de passada, ângulos do joelho e tornozelo no foot strike e no take-off, máxima flexão do tronco e máxima flexão do joelho na fase de suporte, amplitude angular do cotovelo durante a passada, máxima pronação da parte posterior do pé e amplitude vertical do centro de massa) e 8 variáveis neuromusculares (ativação elétrica muscular do reto femoral, vasto lateral, semitendinoso e bíceps femoral - porção curta – nas fases de suporte e balanço) da corrida, correlacionando-as com a economia de corrida (ECO). Dezesseis homens (idade: 27+1 anos; consumo máximo de oxigênio (VO2máx): 56,4+4,8 ml.kg-1.min), corredores fundistas com experiência em provas de 10.000 metros, realizaram um teste submáximo de corrida em esteira rolante na velocidade de 16 km.h-1 correspondente a uma intensidade média de 10,7% abaixo do limiar anaeróbio (LA) e a uma velocidade média de 11,1% abaixo da velocidade no LA. Foi utilizado um ergoespirômetro portátil para registro do consumo submáximo de oxigênio (VO2submáx) e para o registro das variáveis cinemáticas e neuromusculares da corrida...

Efeitos de dois programas de treinamento em piscina funda nas respostas cardiorrespiratórias, neuromusculares e no equilíbrio de idosos; The effects of two training programs in deep water on cardiorespiratory, neuromuscular and balance responses in elderly men

Kanitz, Ana Carolina
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
35.96%
O crescimento acelerado da população idosa juntamente com o aumento da procura por atividades físicas tem motivado cada vez mais estudos que envolvam treinamento e o idoso. A corrida em piscina funda parece ser uma alternativa interessante para essa população, uma vez que não possui impacto nos membros inferiores possibilitando que o indivíduo se exercite em grandes cargas aeróbias com menor risco de lesão. Desta forma, o objetivo do presente estudo foi avaliar os efeitos de dois programas de treinamento em piscina funda nas respostas cardiorrespiratórias, neuromusculares e no equilíbrio de idosos. Participaram do estudo 34 sujeitos, divididos em um grupo que realizou um treinamento aeróbio de corrida em piscina funda (AERO; n=16; 66±4 anos) e um grupo que realizou um treinamento de força em meio aquático seguido do treinamento aeróbio de corrida em piscina funda (FOR-AERO; 64±4 anos). Ambos os grupos realizaram um período de familiarização com o meio aquático e com a técnica de corrida em piscina funda anteriormente ao período de treinamento, com duração de quatro semanas e com frequência semanal de duas sessões. Já o período de treinamento teve uma duração de 12 semanas realizando três sessões por semana. Antes e após ambos os períodos...

Using state-space techniques to represent frequency dependent single-phase lines directly in time domain

Kurokawa, S.; Yamanaka, F. N R; Prado, Afonso J.; Pissolato, J.
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Conferência ou Objeto de Conferência Formato: 924-928
ENG
Relevância na Pesquisa
26.04%
This paper proposes to use a state-space technique to represent a frequency dependent line for simulating electromagnetic transients directly in time domain. The distributed nature of the line is represented by a multiple 1t section network made up of the lumped parameters and the frequency dependence of the per unit longitudinal parameters is matched by using a rational function. The rational function is represented by its equivalent circuit with passive elements. This passive circuit is then inserted in each 1t circuit of the cascade that represents the line. Because the system is very sparse, it is possible to use a sparsity technique to store only nonzero elements of this matrix for saving space and running time. The model was used to simulate the energization process of a 10 km length single-phase line. ©2008 IEEE.

Avaliação tardia do grau de satisfação com a técnica de sutura circular contínua para mamoplastia= : Late evaluation of satisfaction levels with running circular suture technique for reduction mammaplasty; Late evaluation of satisfaction levels with running circular suture technique for reduction mammaplasty

Marco Antonio de Camargo Bueno
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 04/12/2012 PT
Relevância na Pesquisa
26.2%
Muitos estudos descreveram vários aspectos técnicos a respeito do procedimento de mamoplastia redutora. Os autores apresentam suas técnicas que combinam algumas técnicas já descritas na literatura a respeito da reposição do complexo aerolopapilar (CAP), redução do diâmetro da base da mama e retenção da projeção do cone mamário em longo prazo. Este estudo avaliou os resultados de pacientes de várias idades em relação à dimensão da cicatriz, posicionamento da mama e satisfação da paciente a curto, médio e longo prazo. Método: A mamoplastia foi realizada utilizando-se a técnica do T invertido. As marcações pré- operatórias diferem daquelas descritas na literatura deixando a posição futura do CAP como ponto livre. Uma sutura circular foi utilizado para fixar a mama na fascia do músculo peitoral maior e reduzir o diâmetro da base da mama, resultando numa cicatriz horizontal reduzida no sulco inframamário. A técnica de marcação da pele permite uma melhor simetria pós-operatório apesar das variações pré- operatórias de forma e volume. Resultados: Os resultados foram considerados satisfatórios na maioria dos casos por ambos pacientes (93,7%) e médico (91,1%). O posicionamento adequado do pólo superior mamário foi mantido em 94...

Running Circular Suture Technique for Reduction Mammaplasty and Mastopexy

de Camargo Bueno, Marco Antonio; Cavazana, William Cesar; Baroudi, Ricardo; Fachina Nunes, Paulo Henrique; Psillakis, Jorge Miguel; Santana Ferreira Boin, Ilka de Fatima
Fonte: Springer; New York Publicador: Springer; New York
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
26.13%
Many reports have described various technical aspects of reduction mammaplasty and mastopexy procedures. The authors present their technique, which combines a number of techniques already described in the literature regarding repositioning of the nipple-areola complex, reduction of the diameter of the base of the breast, and long-term retention of mammary cone projection. This study evaluated the results for patients of various ages and phenotypes in terms of scar dimensions, breast positioning, and patient satisfaction in the short, medium, and long terms. Mammaplasty was performed using the inverted T technique. The preoperative skin markings differed from those described in the literature in that they did not use the future position of the nipple-areola complex as the main reference point. A running circular suture was used to fix the breast to the pectoralis major fascia and to reduce the diameter of the base of the breast, resulting in a reduced horizontal scar in the inframammary fold. The skin-marking technique allowed for better postoperative breast symmetry regardless of preoperative variations in shape and volume. The outcomes were considered satisfactory in the majority of cases by both the patient (p = 0.78) and the physician (p = 0.58). Adequate fullness of the upper pole was maintained in 94.7 % of the breasts. The described technique results in a reduced diameter of the base of the breast...

Isoelectric focusing--polynucleotide/polyacrylamide-gel electrophoresis. A technique to separate and characterize nuclease activities.

Karpetsky, T; Brown, G E; McFarland, E; Brady, S T; Roth, W; Rahman, A; Jewett, P
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 15/04/1984 EN
Relevância na Pesquisa
26.07%
Individual native nuclease activities from human leucocytes are separated by using two-dimensional gel electrophoresis in an apparatus that allows the simultaneous running of 28 gels. Proteins are separated by isoelectric focusing in a disc gel, followed by electrophoresis into a slab gel containing DNA. Protein denaturants are avoided in the second dimension by the use of a running pH well above the optimal pH for DNAase (deoxyribonuclease) activity. Electrophoresed gels are incubated in appropriate buffers to activate nuclease activity. After staining for intact DNA, the positions of active enzymes, unobscured by the presence of other proteins, are revealed as colourless spots in a reddish-purple field. The technique is easy to use and is sensitive to 50pg of DNAase I. Versatility is provided by the use of either acidic or basic electrophoresis running buffers and by the use of specific gel incubation conditions to reveal different sets of enzyme activities. Two DNAases active at pH 7.4 in the presence of Mg2+ and Ca2+, and sixteen DNAases active at acidic pH and not requiring metals, are detected. Treatment of the human enzymes with specific glycosidases reveals that many of the human DNAases are glycoproteins containing negatively charged moieties and may be derived from modification of parent activities.

Technique and Observation of Angular Gait Patterns in Running

Sykes, K.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /12/1975 EN
Relevância na Pesquisa
26.07%
A technique for the biomechanical analysis of running is described with specific reference to the angular displacement patterns of the lower limb. From high speed cine film recording profile views of the running gait, the Thigh, Knee and Ankle angles are measured during one complete cycle. Results are presented in the form of vector-space diagrams, namely Thigh-Knee angle and Knee-Ankle angle cyclograms. The diagrams are interpreted and some experimental observations are presented and discussed.

Compliance, actuation, and work characteristics of the goat foreleg and hindleg during level, uphill, and downhill running

Lee, David V.; McGuigan, M. Polly; Yoo, Edwin H.; Biewener, Andrew A.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
26.07%
We model the action of muscle-tendon system(s) about a given joint as a serial actuator and spring. By this technique, the experimental joint moment is imposed while the combined angular deflection of the actuator and spring are constrained to match the experimental joint angle throughout the stance duration. The same technique is applied to the radial leg (i.e., shoulder/hip-to-foot). The spring constant that minimizes total actuator work is considered optimal, and this minimum work is expressed as a fraction of total joint/radial leg work, yielding an actuation ratio (AR; 1 = pure actuation and 0 = pure compliance). To address work modulation, we determined the specific net work (SNW), the absolute value of net divided by total work. This ratio is unity when only positive or negative work is done and zero when equal energy is absorbed and returned. Our proximodistal predictions of joint function are supported during level and 15° grade running. The greatest AR and SNW are found in the proximal leg joints (elbow and knee). The ankle joint is the principal spring of the hindleg and shows no significant change in SNW with grade, reflecting the true compliance of the common calcaneal tendon. The principal foreleg spring is the metacarpophalangeal joint. The observed pattern of proximal actuation and distal compliance...

Left atrial appendage occlusion by invagination and double suture technique

Hernandez-Estefania, Rafael; Levy Praschker, Beltran; Bastarrika, Gorka; Rabago, Gregorio
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
35.88%
Left atrial appendage (LAA) plays a crucial role as a source of atrial thrombus in patients with atrial fibrillation (AF). Thus, the need to close LAA becomes evident in patients with AF who undergo concomitant mitral valve surgery. Unfortunately, it has been reported a high rate of unsuccessful LAA occlusion, regardless of the technique employed.We propose a safe and simple method for LAA occlusion consisting in invagination of the appendage into the left atrium, followed by two sutures (purse string suture around the base of the LAA and a reinforce running suture).

The Test-Retest Reliability of Anatomical Co-Ordinate Axes Definition for the Quantification of Lower Extremity Kinematics During Running

Sinclair, Jonathan; Taylor, Paul John; Greenhalgh, Andrew; Edmundson, Christopher James; Brooks, Darrell; Hobbs, Sarah Jane
Fonte: Akademia Wychowania Fizycznego w Katowicach Publicador: Akademia Wychowania Fizycznego w Katowicach
Tipo: Artigo de Revista Científica
Publicado em 30/12/2012 EN
Relevância na Pesquisa
26.16%
Three-dimensional (3-D) kinematic analyses are used widely in both sport and clinical examinations. However, this procedure depends on reliable palpation of anatomical landmarks and mal-positioning of markers between sessions may result in improperly defined segment co-ordinate system axes which will produce in-consistent joint rotations. This had led some to question the efficacy of this technique. The aim of the current investigation was to assess the reliability of the anatomical frame definition when quantifying 3-D kinematics of the lower extremities during running. Ten participants completed five successful running trials at 4.0 m·s−1 ± 5%. 3-D angular joint kinematics parameters from the hip, knee and ankle were collected using an eight camera motion analysis system. Two static calibration trials were captured. The first (test) was conducted prior to the running trials following which anatomical landmarks were removed. The second was obtained following completion of the running trials where anatomical landmarks were re-positioned (retest). Paired samples t-tests were used to compare 3-D kinematic parameters quantified using the two static trials, and intraclass correlations were employed to examine the similarities between the sagittal...

Horizontal Running Mattress Suture Modified with Intermittent Simple Loops

Chacon, Anna H; Shiman, Michael I; Strozier, Narissa; Zaiac, Martin N
Fonte: Medknow Publications & Media Pvt Ltd Publicador: Medknow Publications & Media Pvt Ltd
Tipo: Artigo de Revista Científica
Publicado em //2013 EN
Relevância na Pesquisa
26.24%
Using the combination of a horizontal running mattress suture with intermittent loops achieves both good eversion with the horizontal running mattress plus the ease of removal of the simple loops. This combination technique also avoids the characteristic railroad track marks that result from prolonged non-absorbable suture retention. The unique feature of our technique is the incorporation of one simple running suture after every two runs of the horizontal running mattress suture. To demonstrate its utility, we used the suturing technique on several patients and analyzed the cosmetic outcome with post-operative photographs in comparison to other suturing techniques. In summary, the combination of running horizontal mattress suture with simple intermittent loops demonstrates functional and cosmetic benefits that can be readily taught, comprehended, and employed, leading to desirable aesthetic results and wound edge eversion.

Modification of Agility Running Technique in Reaction to a Defender in Rugby Union

Wheeler, Keane W.; Sayers, Mark G.L.
Fonte: Asist Group Publicador: Asist Group
Tipo: Artigo de Revista Científica
Publicado em 01/09/2010 EN
Relevância na Pesquisa
46.25%
Three-dimensional kinematic analysis examined agility running technique during pre-planned and reactive performance conditions specific to attacking ball carries in rugby union. The variation to running technique of 8 highly trained rugby union players was compared between agility conditions (pre-planned and reactive) and also agility performance speeds (fast, moderate and slow). Kinematic measures were used to determine the velocity of the centre of mass (COM) in the anteroposterior (running speed) and mediolateral (lateral movement speed) planes. The position of foot-strike and toe-off was also examined for the step prior to the agility side- step (pre-change of direction phase) and then the side-step (change of direction phase). This study demonstrated that less lateral movement speed towards the intended direction change occurred during reactive compared to pre-planned conditions at pre-change of direction (0.08 ± 0.28 m·s-1 and 0.42 ± 0.25 m·s-1, respectively) and change of direction foot-strikes (0.25 ± 0.42 m·s-1 and 0.69 ± 0.43 m·s-1, respectively). Less lateral movement speed during reactive conditions was associated with greater lateral foot displacement (44.52 ± 6.10% leg length) at the change of direction step compared to pre-planned conditions (41.35 ± 5.85%). Importantly...

Exercise economy in skiing and running

Losnegard, Thomas; Schäfer, Daniela; Hallén, Jostein
Fonte: Frontiers Media S.A. Publicador: Frontiers Media S.A.
Tipo: Artigo de Revista Científica
Publicado em 24/01/2014 EN
Relevância na Pesquisa
26.08%
Substantial inter-individual variations in exercise economy exist even in highly trained endurance athletes. The variation is believed to be determined partly by intrinsic factors. Therefore, in the present study, we compared exercise economy in V2-skating, double poling, and uphill running. Ten highly trained male cross-country skiers (23 ± 3 years, 180 ± 6 cm, 75 ± 8 kg, VO2peak running: 76.3 ± 5.6 mL·kg−1·min−1) participated in the study. Exercise economy and VO2peak during treadmill running, ski skating (V2 technique) and double poling were compared based on correlation analysis. There was a very large correlation in exercise economy between V2-skating and double poling (r = 0.81) and large correlations between V2-skating and running (r = 0.53) and double poling and running (r = 0.58). There were trivial to moderate correlations between exercise economy and the intrinsic factors VO2peak (r = 0.00–0.23), cycle rate (r = 0.03–0.46), body mass (r = −0.09–0.46) and body height (r = 0.11–0.36). In conclusion, the inter-individual variation in exercise economy could be explained only moderately by differences in VO2peak, body mass and body height. Apparently other intrinsic factors contribute to the variation in exercise economy between highly trained subjects.

Clinical outcomes of non-torque pattern double running suture technique for optical penetrating keratoplasty

Wang, Xu; Fan, Chong-Hui; Gao, Yang; Duan, Lian; Dang, Guang-Fu
Fonte: e-Century Publishing Corporation Publicador: e-Century Publishing Corporation
Tipo: Artigo de Revista Científica
Publicado em 15/02/2015 EN
Relevância na Pesquisa
26.21%
Objective: To validate non-torque pattern double running suture technique for optical penetrating keratoplasty compared with traditional suture method. Methods: 56 patients (56 eyes) undergoing optical penetrating keratoplasty were divided into two groups. The experimental group (28 cases) underwent non-torque pattern double running suture technique, and the control group (28 cases) underwent interrupted suture. All participants were followed up at 2 weeks, 2 months, 6 months, and 1 year postoperatively. The best corrected visual acuity (BCVA), corneal curvature change and astigmatism change were observed and compared between the two groups, and corneal topographer was used to measure refractive change. Results: BCVA in experimental group was significantly improved (P<0.05); the corneal topographer showed that astigmatism in experimental group was significantly lower than that in control group at the early postoperative phase (P<0.001). Six months later postoperatively, astigmatism gap between the two groups was narrowed, but the differences were still statistically significant (P<0.001). Twelve months later, astigmatism in the experimental group was similar to six months ago, but astigmatism in control group reduced significantly. No significant difference in astigmatism was observed between two groups (P>0.05). Conclusion: Non-torque pattern double running suture technique for optical penetrating keratoplasty can achieve the BCVA at the very early phase...

Efecto de dos programas de entrenamiento de la técnica de carrera sobre el aprendizaje procedimental y conceptual, y sobre la percepción de eficacia

Suelotto, R.; Palao Andrés, José Manuel
Fonte: Universidade Européia Publicador: Universidade Européia
Tipo: Artigo de Revista Científica
SPA
Relevância na Pesquisa
26.25%
El objetivo del trabajo fue analizar el efecto de dos programas de entrenamiento integrados en el calentamiento y compuestos por ejercicios de técnica de carrera sobre la ejecución, la velocidad de desplazamiento, el conocimiento teórico, y la percepción de eficacia de la técnica de carrera en niños pre-púberes. La muestra objeto de estudio fueron 16 niños (10 niñas y seis niños) de una escuela de atletismo de la región de Murcia (España). El diseño del estudio fue cuasi-experimental entre grupos, con un pre-test, pos-test, y re-test. Los sujetos fueron divididos en tres grupos (dos experimentales y uno de control). El tratamiento duró 15 sesiones (5 semanas) de seis minutos integrados en el calentamiento. El grupo 1 realizó ejercicios de asimilación. El grupo 2 realizó ejercicios de asimilación y de aplicación. El grupo 3 fue el grupo control. La variable independiente fue el tratamiento (realización de ejercicios y tipo) y las variables dependientes fueron la ejecución técnica, la velocidad de desplazamiento, el conocimiento teórico, y la percepción de eficacia. La aplicación de ejercicios de técnica de carrera durante cinco semanas no produce mejo- ras en la calidad técnica y en el aspecto conceptual referente a la carrera. La realización de ejercicios de asimilación mejora la auto-percepción de eficacia y el tiempo de desplazamiento. Este aprendizaje se mantiene tras un período sin entrenamiento. El entrenamiento con ejercicios de asimilación y aplicación mejora el tiempo de desplazamiento...

The sources of external work in level walking and running.

Cavagna, G A; Thys, H; Zamboni, A
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /11/1976 EN
Relevância na Pesquisa
26.02%
The work done at each step during level walking and running to lift the centre of mass of the body, Wv, and to increase its forward speed, Wf, and the total mechanical energy involved (potential + kinetic) Wext, have been measured at various 'constant' speeds (2-32 km/hr) with the technique described by Cavagna (1975). 2. At intermediate speeds of walking (about 4 km/hr) Wv = Wf and Wext/km is at a minimum, as is the energy cost. At lower speeds Wv greater than Wf whereas at higher speeds Wf greather than Wv: in both cases Wext/km increases. 3. The recovery of mechanical energy, through the pendular motion characteristic of walking, was measured as (/Wv/ + /Wf/ - Wext)/(/Wv/ + /Wf/): it attains a maximum (about 65%) at intermediate speeds. 4. A simple model, assuming that in walking the body rotates as an inverted pendulum over the foot in contact with the ground, fits the experimental data better at intermediate speeds but is no longer tenable above 7 km/hr. 5. In running the recovery defined above is minimal (0-4% independent of speed), i.e. Wext congruent to /Wv/ + /Wf/: potential and kinetic energy of the body do not interchange but are simultaneously taken up and released by the muscles with a rate increasing markedly with the speed (from about 1 to 4 h.p.). 6. Wext increases linearly with the running speed Vf from a positive y intercept owing to the fact that Wv is practically constant independent of Vf. On the contrary...

Polynomial adjustment as a new technique for determination of lactate minimum velocity with blood sampling reduction; Ajuste polinomial como nova técnica para determinação da velocidade do lactato mínimo com redução de coletas sanguíneas

Sotero, Rafael da Costa; Campbell, Carmen Silvia Grubert; Pardono, Emerson; Puga, Guilherme Morais; Simões, Herbert Gustavo
Fonte: Universidade Católica de Brasília Publicador: Universidade Católica de Brasília
Tipo: Artigo de Revista Científica Formato: Texto
EN
Relevância na Pesquisa
35.88%
The purpose of this study was to analyze the possibility of identifying the lactate minimum velocity (LM) and estimating the maximal lactate steady state intensity (MLSS) by applying a polynomial function to just three stages of the LM test. Seventeen physically active males (24.1 ± 4.0 years; 23.8 ±2.2kg.m2(-1) BMI; 11.7 ± 3.8% body fat) performed: 1) a 1600m time trial (1600mV); 2) a 150m sprint to induce hyperlactatemia, and then an incremental test (InT) consisting of 6 x 800m at intensities of 78, 81, 84, 87, 90 and 93% of 1600mV; 3) 2 to 3 sessions of constant 30 min running tests to identify MLSS. Blood lactate [lac] was determined by an electrochemical method (YSI - 2700 SELECT). The LM was identifi ed visually (LMv) as well by applying polynomial function to the [lac] responses at all 6 stages (LMp), to the 1st, 3rd and 5th stages (LMp135), to the 1st, 3rd and 6th stages (LMp136) and to the 1st, 4th and 6th stages (LMp146) of InT. The ANOVA detected no differences between the velocities (m.min-1) identifi ed by LMv (196.0 ± 17.8) LMp (198.0 ± 17.6), LMp135 (197.7 ± 17.6), LMp136 (200.0 ±17.2), LMp146 (199,7 ± 18,1) and MLSS (198.7 ±16.6) (p>0.05), with a high correlation among each other (p<0.01). The polynomial function identifi ed LM even when applied to just 3 stages of the incremental test...

The QCD running charge and its RGI three-gluon vertex parent in the Pinch Technique

Cornwall, John M.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 08/11/2012
Relevância na Pesquisa
26.07%
We give a brief review of an elementary extension of the Pinch Technique (PT) that yields renormalization-group invariant (RGI) Green's functions, called PT-RGI. These are also gauge- and process-independent, show dimensional transmutation, and are the natural ingredients of skeleton expansions of physical processes. Because of a dynamically-generated gluon mass all PT-RGI Green's functions are IR-finite. Next we show from the ghost-free Ward identities of the PT how the conventional running charge is recovered from the full PT-RGI three-gluon vertex, which depends on three momenta. The usual running charge, depending on only one momentum, is not necessarily a good substitute for this PT-RGI three-gluon vertex. We show that at one dressed loop a good approximation to the full dressed loop PT-RGI three-gluon vertex, both in the UV and in the IR, comes from input propagators and vertices that are free, except that the propagator is modified by introducing a (constant) mass term. Finally,we illustrate these ideas in the much simpler context of a scalar theory with cubic interactions in d=6, which is asymptotically free.; Comment: Talk at the symposium Quantum Chromodynamics: HIstory and Prospects, Oberwoelz, Austria, September 2012

Distributed Parameter Estimation with Quantized Communication via Running Average

Zhu, Shanying; Soh, Yeng Chai; Xie, Lihua
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
26.18%
In this paper, we consider the parameter estimation problem over sensor networks in the presence of quantized data and directed communication links. We propose a two-stage algorithm aiming at achieving the centralized sample mean estimate in a distributed manner. Different from the existing algorithms, a running average technique is utilized in the proposed algorithm to smear out the randomness caused by the probabilistic quantization scheme. With the running average technique, it is shown that the centralized sample mean estimate can be achieved both in the mean square and almost sure senses, which is not observed in the conventional consensus algorithms. In addition, the rates of convergence are given to quantify the mean square and almost sure performances. Finally, simulation results are presented to illustrate the effectiveness of the proposed algorithm and highlight the improvements by using running average technique.; Comment: 13 pages, 6 figures; IEEE Transactions on Signal Processing, 2015

Polynomial adjustment as a new technique for determination of lactate minimum velocity with blood sampling reduction; Ajuste polinomial como nova técnica para determinação da velocidade do lactato mínimo com redução de coletas sanguíneas

da Costa Sotero, Rafael; Universidade Católica de Brasília.; Grubert Campbell, Carmen Silvia; Universidade Católica de Brasília.; Pardono, Emerson; Universidade Católica de Brasília.; Morais Puga, Guilherme; Universidade Católica de Brasília.; Sim
Fonte: Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil Publicador: Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; "Avaliado por Pares",; Avaliado por Pares; Descritiva Formato: application/pdf; application/pdf
Publicado em 23/11/2007 POR; ENG
Relevância na Pesquisa
35.88%
The purpose of this study was to analyze the possibility of identifying the lactate minimum velocity (LM) and estimating the maximal lactate steady state intensity (MLSS) by applying a polynomial function to just three stages of the LM test. Seventeen physically active males (24.1 ± 4.0 years; 23.8 ±2.2kg.m2(-1) BMI; 11.7 ± 3.8% body fat) performed: 1) a 1600m time trial (1600mV); 2) a 150m sprint to induce hyperlactatemia, and then an incremental test (InT) consisting of 6 x 800m at intensities of 78, 81, 84, 87, 90 and 93% of 1600mV; 3) 2 to 3 sessions of constant 30 min running tests to identify MLSS. Blood lactate [lac] was determined by an electrochemical method (YSI - 2700 SELECT). The LM was identifi ed visually (LMv) as well by applying polynomial function to the [lac] responses at all 6 stages (LMp), to the 1st, 3rd and 5th stages (LMp135), to the 1st, 3rd and 6th stages (LMp136) and to the 1st, 4th and 6th stages (LMp146) of InT. The ANOVA detected no differences between the velocities (m.min-1) identified by LMv (196.0 ± 17.8) LMp (198.0 ± 17.6), LMp135 (197.7 ± 17.6), LMp136 (200.0 ± 17.2), LMp146 (199,7 ± 18,1) and MLSS (198.7 ±16.6) (p>0.05), with a high correlation among each other (p; O propósito do estudo foi analisar a possibilidade de identificação da velocidade de lactato mínimo (LM) e de se estimar a máxima fase estável de lactato (MFEL)...