The relation of knowledge of textual integration devices to expository text comprehension under different assessment conditions     

Emilio Sánchez  J. Ricardo García 《Reading and writing》2009,22(9):1081-1108

In this study we propose a theoretical construct (called rhetorical competence) that represents the ability of readers to detect, understand, and use the linguistic cues or discourse markers that texts contain. We measure one of the three postulated components of rhetorical competence (knowledge of textual integration markers), assessing whether readers correctly interpret these markers while reading. The influence of this skill on reading competence is examined in a correlational study of 185 sixth-grade pupils (aged 11–12 years) using different assessment materials (a standardized test and an academic text) and reading conditions (habitual and aided). Multiple regression analyses of the data indicate that knowledge of textual integration devices makes a significant independent contribution to expository text comprehension under most assessment conditions when the effects of working memory, prior knowledge, and word recognition skills are controlled.  相似文献   

Adaptive synchronization of unknown heterogeneous agents: An adaptive virtual model reference approach     

Simone Baldi  Paolo Frasca 《Journal of The Franklin Institute》2019,356(2):935-955

This work deals with state synchronization of heterogeneous linear agents with unknown dynamics. The problem is solved by formulating the synchronization problem as a special model reference adaptive control where each agent tries to converge to the model defined by its neighbors. For those agents that do not know the reference signal that drives the flock, a fictitious reference is estimated in place of the actual one: the estimation of such reference is distributed and requires measurements from neighbors. By using a matching condition assumption, which is imposed so that the agents can converge to the same behavior, the fictitious reference estimation leads to adaptive laws for the feedback and the coupling gains arising from distributed matching conditions. In addition, the coupling connection is not scalar as in most literature, but possibly vector-valued. The proposed approach is applicable to heterogeneous agents with arbitrarily large matched uncertainties. A Lyapunov-based approach is derived to show analytically asymptotic convergence of the synchronization error: robustification in the presence of bounded errors or unknown (constant) leader input is also discussed. Finally, a motivational example is presented in the context of Cooperative Adaptive Cruise Control and numerical examples are provided to demonstrate the effectiveness of the proposed method.  相似文献   

Composite cooperative synchronization and decentralized learning of multi-robot manipulators with heterogeneous nonlinear uncertain dynamics     

Xiaonan Dong  Chengzhi Yuan  Paolo Stegagno  Wei Zeng  Cong Wang 《Journal of The Franklin Institute》2019,356(10):5049-5072

This paper studies the problem of composite synchronization and learning of multiple coordinated robot manipulators subject to heterogeneous nonlinear uncertain dynamics under the leader-follower framework. A new two-layer distributed adaptive learning control scheme is proposed, which consists of the first-layer distributed cooperative estimator and the second-layer decentralized deterministic learning controller. The first layer aims to enable each robotic agent to estimate the leader’s information. The second layer is responsible for not only controlling each individual robotic agent to track over desired reference trajectory, but also accurately identifying/learning each robot’s nonlinear uncertain dynamics. Design and implementation of this two-layer distributed controller can be carried out in a fully-distributed manner, which do not require any global information including global connectivity of the communication network. The Lyapunov method is applied to rigorously analyze stability and parameter convergence of the resulting closed-loop system. Numerical simulations on a team of two-degree-of-freedom robot manipulators have been conducted to demonstrate the effectiveness of the proposed results.  相似文献   

Book reviews     

Alexander Vucinich  Edward J. Monahan  Bernard D. Davis  Arthur Hearnden  Paolo Palladino  Bruce L. R. Smith 《Minerva》1991,29(4):476-516

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Prevention of child abuse and neglect through early diagnosis of serious disturbances in the mother-child relationship in Italy     

Ernesto Caffo  Gian Paolo Guaraldi  Giorgio Magnani  Rita Tassi 《Child abuse & neglect》1982,6(4):453-463

At the obstetrical clinic of Modena University and a family center of the same municipality during the first six months of 1980 a questionnaire based on "Risks of Child Abuse" by Kempe, Gray and others was administered to 33 expectant mothers during the third trimester of pregnancy, a few days after delivery, and a month and one-half after childbirth, for the purpose of examining the mother-child relationship. Two principal groups of "risk factors" which may lead to child abuse and neglect appeared: mothers with preceding personal and social experiences, and cases of medical intervention (e.g., prematurity, caesarean). Use of a questionnaire that permitted early diagnosis made possible help in establishing a good mother-child relationship in the first months of life. Such help can be given by the hospital and public centers both before and after birth.  相似文献   

“Who will be left to tell the tale?” Recordkeeping and international criminal jurisprudence     

Tom A. Adami 《Archival Science》2007,7(3):213-221

The article sets out to pose the question ‘Is it possible for an archive to aid the process of reconciliation?’ Is the scale of a given event, in some cases, insurmountable in terms of reconciling the parties? The graphic nature of the archives and the issue of psychological impact of an archive on the archivist is explored. It is contended that through outreach and dissemination of the contents of the archive, it is possible to provide to the affected communities the information of what the international community has done in terms of judicial redress. Archives can also fulfil-dual roles and this issue is touched upon in that the purpose and organization of the archive is changing from an active records center or a tool of repression to suit a future audience of researchers or to aid reconciliation.  相似文献   

Google Scholar,Web of Science,and Scopus: A systematic comparison of citations in 252 subject categories   总被引：1，自引：0，他引：1  

Alberto Martín-Martín  Enrique Orduna-Malea  Mike Thelwall  Emilio Delgado López-Cózar 《Journal of Informetrics》2018,12(4):1160-1177

Despite citation counts from Google Scholar (GS), Web of Science (WoS), and Scopus being widely consulted by researchers and sometimes used in research evaluations, there is no recent or systematic evidence about the differences between them. In response, this paper investigates 2,448,055 citations to 2299 English-language highly-cited documents from 252 GS subject categories published in 2006, comparing GS, the WoS Core Collection, and Scopus. GS consistently found the largest percentage of citations across all areas (93%–96%), far ahead of Scopus (35%–77%) and WoS (27%–73%). GS found nearly all the WoS (95%) and Scopus (92%) citations. Most citations found only by GS were from non-journal sources (48%–65%), including theses, books, conference papers, and unpublished materials. Many were non-English (19%–38%), and they tended to be much less cited than citing sources that were also in Scopus or WoS. Despite the many unique GS citing sources, Spearman correlations between citation counts in GS and WoS or Scopus are high (0.78-0.99). They are lower in the Humanities, and lower between GS and WoS than between GS and Scopus. The results suggest that in all areas GS citation data is essentially a superset of WoS and Scopus, with substantial extra coverage.  相似文献   

A literature review on knowledge management in SMEs     

Roberto?Cerchione  Emilio?EspositoEmail author  Maria Rosaria?Spadaro 《知识管理研究与实践》2016,14(2):169-177

This paper provides a systematic review of the literature on knowledge management (KM) in small and medium enterprises (SMEs) and SME networks. The main objective is to highlight the state-of-the-art of KM from the management point of view in order to identify relevant research gaps. The review highlights that in recent years the trend of papers on the topic is growing and involves a variety of approaches, methodologies and models from different research areas. The vast majority of papers analysed focus on the topic of KM in the SME while there are only few papers analysing KM in networks populated by SMEs. The content analysis of the papers highlights six areas of investigation from which were derived ten research questions concerning three perspectives: the factors affecting KM; the impact of KM on firm’s performance; the knowledge management systems.  相似文献   

Modified team‐based learning strategy to improve human anatomy learning: A pilot study at the Universidad del Norte in Barranquilla,Colombia          下载免费PDF全文

Emilio G. Martínez  Rafael Tuesca 《Anatomical sciences education》2014,7(5):399-405

As part of an institutional program sponsored by the Centre for Teaching Excellence at the Universidad del Norte, Barranquilla, Colombia, we developed an educational research study on two sessions of human anatomy in which we combined team‐based learning (TBL) and the use of iPads. Study data included the TBL, assessments applied during the course, student's grades on mid‐term examinations and students' perceptions of their experiences. Students reported a positive attitude toward the use of the TBL sessions, and the results showed a significant improvement in their learning between the first and second sessions. Significantly positive correlations (P < 0.05) were obtained between (a) the individual students' readiness test performance 1 and mid‐term examination 1, (b) the individual readiness test performances from Session 1 to Session 2, and (c) the group readiness test performances from the first and second sessions. These results point to positive learning experiences for these students. Analyses of the students' reflections on their activities also pointed toward future challenges. Anat Sci Educ 7: 399–405. © 2014 American Association of Anatomists.  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