PRISMA-S: an extension to the PRISMA statement for reporting literature searches in systematic reviews     

Melissa L. Rethlefsen  Shona Kirtley  Siw Waffenschmidt  Ana Patricia Ayala  David Moher  Matthew J. Page  Jonathan B. Koffel  PRISMA-S Group 《Journal of the Medical Library Association》2021,109(2):174

Background:Literature searches underlie the foundations of systematic reviews and related review types. Yet, the literature searching component of systematic reviews and related review types is often poorly reported. Guidance for literature search reporting has been diverse and, in many cases, does not offer enough detail to authors who need more specific information about reporting search methods and information sources in a clear, reproducible way. This document presents the PRISMA-S (Preferred Reporting Items for Systematic reviews and Meta-Analyses literature search extension) checklist, and explanation and elaboration.Methods:The checklist was developed using a three-stage Delphi survey process, followed by a consensus conference and public review process.Results:The final checklist includes sixteen reporting items, each of which is detailed with exemplar reporting and rationale.Conclusions:The intent of PRISMA-S is to complement the PRISMA Statement and its extensions by providing a checklist that could be used by interdisciplinary authors, editors, and peer reviewers to verify that each component of a search is completely reported and, therefore, reproducible.  相似文献   

Super twisting control of a parametrically excited overhead crane     

Carlos Vázquez  Joaquin Collado  Leonid Fridman 《Journal of The Franklin Institute》2014

The principal contribution of this note is to avoid the parametric resonance effect and attenuate the payload oscillations in an overhead-crane system subject to periodic variations in the base support. Considering an appropriate sliding output with relative degree one, we present the sliding mode control design based on the Super-Twisting Algorithm (STA), ensuring finite time convergence to the desired sliding surface for the linear periodic system with Lipschitz continuous matched and unmatched uncertainties bounded together by their gradients by known functions. The suggested approach also provides chattering phenomenon attenuation. Obtained results are verified experimentally.  相似文献   

Polytopic invariant and contractive sets for closed-loop discrete fuzzy systems     

Carlos Ariño  Emilio Pérez  Antonio Sala  Fernando Bedate 《Journal of The Franklin Institute》2014

In this work a procedure for obtaining polytopic λ-contractive sets for Takagi–Sugeno fuzzy systems is presented, adapting well-known algorithms from literature on discrete-time linear difference inclusions (LDI) to multi-dimensional summations. As a complexity parameter increases, these sets tend to the maximal invariant set of the system when no information on the shape of the membership functions is available. λ-contractive sets are naturally associated to level sets of polyhedral Lyapunov functions proving a decay-rate of λ. The paper proves that the proposed algorithm obtains better results than a class of Lyapunov methods for the same complexity degree: if such a Lyapunov function exists, the proposed algorithm converges in a finite number of steps and proves a larger λ-contractive set.  相似文献   

Reply to a critical commentary of the paper entitled “Sport injuries in an America's Cup yachting crew: A 4-year epidemiological study covering the 2007 challenge”     

Michal Hadala  Carlos Barrios 《Journal of sports sciences》2013,31(10):1141-1144

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Determinants of possession of the ball in soccer     

Carlos Lago  Rafael Martín 《Journal of sports sciences》2013,31(9):969-974

Abstract

In research on the importance of the possession of the ball in soccer, little attention has been paid to its determinants. Using data from 170 matches of the 2003 – 2004 Spanish Soccer League, we explain why differences in the possession of the ball among teams are so great. In particular, four variables are examined: evolving match status (i.e. whether the team is winning, losing or drawing), venue (i.e. playing at home or away), and the identities of the team and the opponent in each match. Results of linear regression analysis show that these four variables are statistically significant and together explain most of the variance in possession. In short, home teams have more possession than away teams, teams have more possession when they are losing matches than when winning or drawing, and the identity of the opponent matters – the worse the opponent, the greater the possession of the ball. Combinations of these variables could be used to develop a model that predicts possession in soccer.  相似文献   

Interpersonal dynamics and relative positioning to scoring target of performers in 1 vs. 1 sub-phases of team sports     

Pedro T. Esteves  Duarte Araújo  Keith Davids  Luís Vilar  Bruno Travassos  Carlos Esteves 《Journal of sports sciences》2013,31(12):1285-1293

Abstract

In this study, we examined the effects of relative positioning of attacker–defender dyads to the basket on interpersonal coordination tendencies in basketball. To achieve this aim, four right-hand dominant basketball players performed in a 1 vs. 1 sub-phase, at nine different playing locations relative to the basket (from 0° to 180°, in 20° increments). Performers’ movement displacement trajectories were video-recorded and digitized in 162 trials. Results showed that interpersonal coordination tendencies changed according to the scaling of the relative position of performers to the basket.

Stable in-phase modes of coordination were observed between performers’ longitudinal and lateral displacements (50.47% and 43.02%) on the left side of the court. On the right side of the court, a shift in the dominant mode of coordination was observed to a defender lead-lag of ?30°, both for longitudinal and lateral displacements (30.51% and 32.65%). These results suggest how information about dribbler hand dominance and relative position to the basket may have constrained attacker–defender coordination tendencies in 1 vs. 1 sub-phases of basketball.  相似文献   

Attitudes towards corporal punishment and reporting of abuse     

Tirosh E  Offer Shechter S  Cohen A  Jaffe M 《Child abuse & neglect》2003,27(8):929-937

OBJECTIVES: To assess physicians' attitudes towards corporal punishment in childhood and their subsequent actions regarding the reporting of child abuse. PARTICIPANTS: 107 physicians (95 pediatricians and 12 family practitioners) who work in hospitals and community clinics in northern Israel were interviewed. Of the participants, 16% were new immigrants. PROCEDURE: A structured interview was conducted by one of two pediatric residents. RESULTS: Attitudes towards corporal punishment were not influenced by the physicians' sex or specialty. Corporal punishment was approved by 58% of the physicians. A significant difference in attitudes towards corporal punishment between immigrants and Israeli born physicians was found (p=.004). Family practitioners and especially senior ones were found significantly less tolerant towards corporal punishment than pediatricians (p=.04). While reporting behavior was not found to be associated with parental status and the past experience of the physicians with child abuse, a significant effect of attitudes towards corporal punishment on reporting behavior was found (p=.01). CONCLUSIONS: (1) Corporal punishment is still perceived as an acceptable disciplinary act by a significant proportion of physicians responsible for the health care of children in our area. (2) Attitudes towards corporal punishment are different between immigrants and native born Israeli trained doctors and, unexpectedly, pediatricians were more tolerant of corporal punishment than family practitioners.  相似文献   

Probing transient protein-mediated DNA linkages using nanoconfinement     

Maedeh Roushan  Parminder Kaur  Alena Karpusenko  Preston J. Countryman  Carlos P. Ortiz  Shuang Fang Lim  Hong Wang  Robert Riehn 《Biomicrofluidics》2014,8(3)

We present an analytic technique for probing protein-catalyzed transient DNA loops that is based on nanofluidic channels. In these nanochannels, DNA is forced in a linear configuration that makes loops appear as folds whose size can easily be quantified. Using this technique, we study the interaction between T4 DNA ligase and DNA. We find that T4 DNA ligase binding changes the physical characteristics of the DNA polymer, in particular persistence length and effective width. We find that the rate of DNA fold unrolling is significantly reduced when T4 DNA ligase and ATP are applied to bare DNA. Together with evidence of T4 DNA ligase bridging two different segments of DNA based on AFM imaging, we thus conclude that ligase can transiently stabilize folded DNA configurations by coordinating genetically distant DNA stretches.  相似文献   

Understanding the development of technology-intensive suppliers in resource-based developing economies     

Carlos Torres-Fuchslocher 《Research Policy》2010,39(2):268-277

The development of local technology-intensive suppliers (t-suppliers) may contribute to both reinforcing the industrial base and supporting the competitiveness of primary production in developing countries. This article explores the role of t-suppliers in natural resource-based economies and outlines a theoretical framework for the analysis of the factors which foster or constrain their development and defines areas for an effective promotion. The proposed model of analysis distinguishes between factors influencing the development of t-suppliers on the level of the main industry, the level of supplier firms or firm-level and the level of external determinants with special reference to industrial policy factors.  相似文献   

Improving OER descriptions to enhance their availability,reuse, and enrichment     

Herrera-Cubides  Jhon Francined  Gaona-Garc&#;a  Paulo Alonso  Montenegro-Mar&#;n  Carlos Enrique  S&#;nchez-Alonso  Salvador 《Education and Information Technologies》2022,27(2):1811-1839

Education and Information Technologies - Nowadays, information and communication technologies (ICTs) and virtual training have increased the use of educational resources. This growth use has...  相似文献