Return to competitive football after major knee surgery: more questions than answers?     

Mario Bizzini  Holly Jacinda Silvers 《Journal of sports sciences》2014,32(13):1209-1216

Abstract

Despite significant advances in the diagnostics and treatment of knee injuries over the last decade, several challenges related to the subject “return to sport” remain largely unknown. For example, how should “return to sport” be defined precisely? What is the optimal timing and progression to enable a return to sport? Which criteria should be used during this process? What type of training is indicated? Which measurements can support the decision-making process? How do we optimally prepare athletes for competition without risking re-injury?

This paper critically addresses these questions, and proposes a return to play model to prepare football players to compete after major knee surgery (anterior cruciate ligament reconstruction, cartilage repair). The goal is to re-integrate the player gradually into the game, taking into account his individual characteristics. Several evidence-based and empirical criteria are needed to plan and monitor the efficient return to competitive football. Injury-prevention education should be part of this process to maximise the chance of a durable career and decrease the risk of re-injury.

However, because of the paucity of research on “return to sport”, further research is more than warranted.  相似文献   

mtDNA analysis of the human remains buried in the sarcophagus of Federico II     

Alfredo Salerno  Giampietro Lago  Andrea Berti  Francesco Calì  Mario Mirisola  Patrizia Carta  Carmen Ferro  Valentino Romano   《Journal of Cultural Heritage》2005,6(4):313-319

The sarcophagus containing the remains of Federico II, located in the Cathedral of Palermo (Sicily, Italy), was opened on 1998 to perform a multidisciplinary survey [1]. Next to the remains of Federico II and in close contact with them were laying two other skeletons belonging, according to historical records, to Pietro II di Aragona and to an anonymous person (“The Third Individual”), probably a woman. The bones appeared severely deteriorated. Chemical analysis performed on bone samples excluded that the bodies underwent some kind of embalming process. The analysis of mtDNA from bone samples taken from the three skeletons was successful in only one of the two labs involved. The HVR1-mtDNA sequence (region: from nt 16,035 to nt 16,395), obtained from the bone samples of Federico II and “The Third Individual” appear identical but bear double peaks at the same nucleotide positions, suggesting mixing (i.e. contamination) of different mtDNA types. The HVR1 sequence obtained from the bone sample of Pietro II di Aragona does not present double peaks and differ from the Cambridge Reference Sequence (CRS) at six nucleotide positions. Cloning experiment of the Federico II amplicon demonstrated that the mixed mtDNA types are only two: one identical to CRS, the other identical to the sequence of Pietro II di Aragona. A reconstruction of these data are proposed in the Discussion. Due to the problematic context in which this study was carried out (mixed and deteriorated biological material, failure to replicate results in two different labs), our results and reconstruction can only be offered on a tentative basis. It is hoped that the data presented in this study will reveal useful, for future comparison, if further molecular genetics research will be carried out on the royal dynasties that ruled Sicily in the early centuries of the past millennium.  相似文献   

At the End of the Rainbow,is there Always a Pot of Gold?: Understanding the Labor and Fervor of Filipino Geriatric Nurses     

Allan B. de Guzman  Maria Ivana D. Ching  Edwin Mark L. Chiong  Charlene C. Chua  Jason Eimer P. Chua  Michelle C. Dumalasa 《Educational gerontology》2013,39(12):1057-1075

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A hybrid fuzzy-molecular controller enhanced with evolutionary algorithms: A case study in a one-leg mechanism     

Hiram Ponce  Mario Acevedo  Noel Esparza-Duran 《Journal of The Franklin Institute》2019,356(16):9432-9450

Intelligent control systems are able to work well in uncertain nonlinear systems, mainly for: changes in the operating point, presence of environmental noise and disturbances, uncertainty in sensor measurements, miscalibration, uncertain model plant, and others. For instance, fuzzy controllers have been widely studied and applied. Recently, artificial organic controllers (AOC) have been proposed as an ensemble of fuzzy logic and artificial hydrocarbon networks. However, a weakness in AOC is the lack of training methods for tuning parameters for desired output responses in control. In this regard, this paper aims to introduce an evolutionary optimization method, i.e. particle swarm optimization, for tuning artificial organic controllers. Three objectives are proposed for automatic tuning of AOC: overall error, steady-state error and settling time of output response. The proposed methodology is implemented in the well-known cart-pole system. Also, the proposed method is applied on a one-leg unstable mechanism as case study. Results validate that automatic tuning of AOC over simulation systems can achieve suitable output responses with minimal overall error, steady-state error and settling time.  相似文献   

A technology gap interpretation of growth paths in Asia and Latin America     

Mario Cimoli  João Basilio Pereima  Gabriel Porcile 《Research Policy》2019,48(1):125-136

This paper presents a North-South technology gap model which combines the Schumpeterian approach to technical and structural change with the Keynesian perspective on effective demand and the Balance-of-Payments (BOP) constraint as drivers of growth. Three are the contributions of the paper. First, it develops a model in which the technology gap, relative productivity and relative wages co-evolve and may generate different paths of convergence or divergence between South and North depending on the parameters of the model. Second, the parameters of the model are associated with different types of policies, which allows for discussing how these policies may change the growth path. Finally, the model is used to discuss the contrasting experiences of Asia and Latin America since 1970. Convergence in Asia and divergence in Latin America have been extensively debated topics in the literature on comparative economic development, which highlights the crucial role of industrial policy. It is argued that the results of the technology gap model are consistent with the findings of this literature and helps understand the forces behind convergence and divergence.  相似文献   

Biomaterials and additive manufacturing: osteochondral scaffold innovation applied to osteoarthritis (BAMOS project)     

Mario MONZóN 《浙江大学学报(A卷英文版)》2018,19(4):329-330

正Osteoarthritis(OA)is a degenerative joint disease,typified by a loss of quality of cartilage and changes in bone at the interface of a joint,resulting in pain,stiffness,and reduced mobility."According to the World Health Organization,40%of people over the age of 70 have OA.This joint disease affects  相似文献   

An advisor like me? Advisor gender and post-graduate careers in science     

Patrick Gaule  Mario Piacentini 《Research Policy》2018,47(4):805-813

We investigate whether having an advisor of the same gender is correlated with the productivity of PhD science students and their propensity to stay in academic science. Our analysis is based an original dataset – combined from dissertation abstracts, faculty directories and bibliometric data – covering nearly 20,000 PhD graduates and their advisors from U.S. chemistry departments. We find that students working with advisors of the same gender tend to be more productive during the PhD; and that female students working with female advisors are considerably more likely to become faculty themselves. We suggest that the under-representation of women in science and engineering faculty positions may perpetuate itself through the lower availability of same-gender advisors for female students.  相似文献   

Empowering collaboration in project-based learning using a scripted environment: lessons learned from analysing instructors’ needs     

Nada M. Alharbi  Rukshan I. Athauda  Raymond Chiong 《Technology, Pedagogy and Education》2018,27(3):381-397

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Test-retest reliability and agreement of the SPI-Questionnaire to detect symptoms of digital ischemia in elite volleyball players     

Daan van de Pol  Tigran Zacharian  Mario Maas  P. Paul F. M. Kuijer 《Journal of sports sciences》2017,35(12):1173-1178

The Shoulder posterior circumflex humeral artery Pathology and digital Ischemia – questionnaire (SPI-Q) has been developed to enable periodic surveillance of elite volleyball players, who are at risk for digital ischemia. Prior to implementation, assessing reliability is mandatory. Therefore, the test-retest reliability and agreement of the SPI-Q were evaluated among the population at risk.

A questionnaire survey was performed with a 2-week interval among 65 elite male volleyball players assessing symptoms of cold, pale and blue digits in the dominant hand during or after practice or competition using a 4-point Likert scale (never, sometimes, often and always). Kappa (κ) and percentage of agreement (POA) were calculated for individual symptoms, and to distinguish symptomatic and asymptomatic players. For the individual symptoms, κ ranged from “poor” (0.25) to “good” (0.63), and POA ranged from “moderate” (78%) to “good” (97%). To classify symptomatic players, the SPI-Q showed “good” reliability (κ = 0.83; 95%CI 0.69–0.97) and “good” agreement (POA = 92%). The current study has proven the SPI-Q to be reliable for detecting elite male indoor volleyball players with symptoms of digital ischemia.  相似文献   

CDN ‐‐ Canada (Province du Québec)     

Yves Lenoir  Mario Laforest  Berthe Pellerin 《欧洲师范教育杂志》1994,17(1-2):57-60

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