Intervention in fluency problems in pupils with Specific Language Impairment (SLI) / Intervención en problemas de fluidez en alumnado con Trastorno Específico del Lenguaje (TEL)     

Víctor Acosta  Gustavo Ramírez-Santana  Sergio Hernández 《Infancia y Aprendizaje》2016,39(3):466-498

The aim of this research has been to prove the efficacy of an intervention programme on the problems of phonetic and semantic fluency and mazes in narrative discourse in children with Specific Language Impairment (SLI). The sample consisted of 34 children diagnosed with SLI and 34 children with normal language development. For the selection of the sample, the Clinical Evaluation of Language Fundamentals (CELF-3), Peabody Picture Vocabulary Test, Hearing Association and the Visual Association subtests of the Illinois Test of Psycholinguistic Abilities (ITPA), and the Kaufman Brief Intelligence Test (KBIT) were used. Performance in phonemes (F, A & S), semantic fluency (animals) and the appearance of mazes or repairs in a narrative task were also evaluated. The intervention programme consisted of 72 sessions of 15 minutes each, using phonetic and semantic fluency activities with phonetic and semantic clues. Differences between groups were statistically significant in repetitions and false connectors.  相似文献   

Introduction to the Treatment of Non-Linear Effects Using a Gravitational Pendulum     

Klaus Weltner  Antonio Sergio C. Esperidião  Paulo Miranda 《Science & Education》2004,13(7):611-629

We show that the treatment of pendulum movement, other than the linear approximation,may be an instructive experimentally based introduction to the physics of non-lineareffects. Firstly the natural frequency of a gravitational pendulum is measured as functionof its amplitude. Secondly forced oscillations of a gravitational pendulum are investigatedexperimentally without limiting amplitudes. By this arrangement new phenomena, thebistability and the jump-effect, can be observed. In the case of bistability the drivengravitational pendulum can oscillate in two different stable modes. Either it oscillateswith a small amplitude and approximately in phase with the exciting torque or it oscillateswith a larger amplitude and approximately anti-phase. The jump effect is the spontaneoustransition from one mode of oscillation to the other. Both effects can be demonstrated andexplained.  相似文献   

Determinants of the job satisfaction of PhD holders: an analysis by gender,employment sector,and type of satisfaction in Spain     

Josep-Oriol Escardíbul  Sergio Afcha 《Higher Education》2017,74(5):855-875

We analyze the determinants of job satisfaction of PhD holders in Spain. Specifically, we consider overall job satisfaction as well as basic and motivational satisfaction, following Herzberg’s typology (based on Maslow’s hierarchy of needs). Using representative data for Spain’s PhD population—collected from the Spanish Survey on Human Resources in Science and Technology (2009)—we report an analysis by gender and the institutional sector (university and non-university) in which employees work. We employ Ordinary Least Squares (OLS) regressions to identify the determinants of basic and motivational satisfaction in the workplace and an ordered logit model for overall job satisfaction. Results do not allow us to confirm Herzberg’s factor differentiation for Spanish PhD holders since the factors of basic motivation (including salary or working conditions—needs of “safety”) have a bearing on all types of job satisfaction (and not solely on the basic satisfaction of PhD holders). Our results do not show any significant differences by gender. However, it seems that meeting these “basic” needs is less important for the job satisfaction of PhD holders working in universities. The results seem reasonable in a Southern European country where the monetary conditions of the labor market are worse than those in other developed countries.  相似文献   

A virtual environment for process management. A step by step implementation     

Sergio Valenzuela Mayer 《European Journal of Engineering Education》2003,28(4):465-481

In this paper it is presented a virtual organizational environment, conceived with the integration of three computer programs: a manufacturing simulation package, an automation of businesses processes (workflows), and business intelligence (Balanced Scorecard) software. It was created as a supporting tool for teaching IE, its purpose is to give professors and alumni the possibility to practice and apply the concepts and knowledge of IE learned at school since the very beginning of the program. This environment allows perform many business processes functions of management; it is already running in both, Local Area Network and Internet. With this system running in a network, it is emulated the functioning of an organization, in which it is necessary a coordination of multiple actions for making decisions in a collaborative and integrated manner. The work developed in this virtual atmosphere permits the participants to face non structured problems, and also it is possible to develop their own skills and aptitudes for being a good professional. The Virtual Enterprise is managed by a Management Committee, formed by high level alumni and invited professors; they have the responsibility of achieving the productivity levels necessary to its own economic profit. The Intermediate courses alumni are in charge of the resources evaluation utilization. The lowest level alumni are in charge of Data Acquisition and feeding the Data Base. The Virtual Enterprise compromises the Industrial Engineering School as a whole, and all the students feel their belonging since the first courses, it motivates them to search for the knowledge and desire to be an Industrial Engineer.  相似文献   

Improved similarity-based modeling for the classification of rotating-machine failures     

Matheus A. Marins  Felipe M.L. Ribeiro  Sergio L. Netto  Eduardo A.B. da Silva 《Journal of The Franklin Institute》2018,355(4):1913-1930

Similarity-based modeling (SBM) is a technique whereby the normal operation of a system is modeled in order to detect faults by analyzing their similarity to the normal system states. First proposed around two decades ago, SBM has been successfully used for fault detection in varied systems. In spite of this success, there is not much study performed in the literature regarding its design, that encompasses both similarity metrics and model training. This work aims at contributing with an in-depth study of SBM for fault detection considering these two design aspects. This is done in the context of proposing a novel system to identify rotating-machinery faults based on SBM, that is employed either as a standalone classifier or to generate features for a random forest classifier. New approaches for training the model and new similarity metrics are investigated. Experimental results are shown for the recently developed Machinery Fault Database (MaFaulDa) that has an extensive set of sequences and fault types, and for the Case Western Reserve University (CWRU) bearing database. Results for both databases indicate that the proposed techniques increase the generalization power of the similarity model and of the associated classifier, achieving accuracies of 98.5% on MaFaulDa and 98.9% on CWRU database.  相似文献   

Validity and reliability of a novel iPhone app for the measurement of barbell velocity and 1RM on the bench-press exercise     

Carlos Balsalobre-Fernández  David Marchante  Mario Muñoz-López  Sergio L. Jiménez 《Journal of sports sciences》2018,36(1):64-70

The purpose of this study was to analyse the validity and reliability of a novel iPhone app (named: PowerLift) for the measurement of mean velocity on the bench-press exercise. Additionally, the accuracy of the estimation of the 1-Repetition maximum (1RM) using the load–velocity relationship was tested. To do this, 10 powerlifters (Mean (SD): age = 26.5 ± 6.5 years; bench press 1RM · kg^?1 = 1.34 ± 0.25) completed an incremental test on the bench-press exercise with 5 different loads (75–100% 1RM), while the mean velocity of the barbell was registered using a linear transducer (LT) and Powerlift. Results showed a very high correlation between the LT and the app (r = 0.94, SEE = 0.028 m · s^?1) for the measurement of mean velocity. Bland–Altman plots (R² = 0.011) and intraclass correlation coefficient (ICC = 0.965) revealed a very high agreement between both devices. A systematic bias by which the app registered slightly higher values than the LT (P < 0.05; mean difference (SD) between instruments = 0.008 ± 0.03 m · s^?1). Finally, actual and estimated 1RM using the app were highly correlated (r = 0.98, mean difference (SD) = 5.5 ± 9.6 kg, P < 0.05). The app was found to be highly valid and reliable in comparison with a LT. These findings could have valuable practical applications for strength and conditioning coaches who wish to measure barbell velocity in the bench-press exercise.  相似文献   

Control of clock signals     

Marcello Farina  Sergio Bittanti  Lorenzo Galleani 《Journal of The Franklin Institute》2009,346(5):449-469

Precision and reliability of timescales are of importance in many situations, in particular in satellite navigation systems (i.e., Galileo system). Motivated by the necessity to improve the precision and the reliability of such clock signals, we have explored the possibility to exploit control theory in clock steering methods. First of all we provide a more robust theoretical framework for the analysis of the process. Two novel control algorithms are here proposed aiming to meet metrological specifications. Numerical simulations have been performed in order to evaluate the performances of the new control systems.  相似文献   

Addressing ontology-based question answering with collections of user queries     

Óscar Ferrández  Rubén Izquierdo  Sergio Ferrández  José Luis Vicedo 《Information processing & management》2009

This paper presents QACID an ontology-based Question Answering system applied to the CInema Domain. This system allows users to retrieve information from formal ontologies by using as input queries formulated in natural language. The original characteristic of QACID is the strategy used to fill the gap between users’ expressiveness and formal knowledge representation. This approach is based on collections of user queries and offers a simple adaptability to deal with multilingual capabilities, inter-domain portability and changes in user information requirements. All these capabilities permit developing Question Answering applications for actual users. This system has been developed and tested on the Spanish language and using an ontology modelling the cinema domain. The performance level achieved enables the use of the system in real environments.  相似文献   

Is strength-training frequency a key factor to develop performance adaptations in young elite soccer players?     

Carlos Otero-Esquina  Óliver Gonzalo-Skok  Sergio Domínguez-Cobo  Hugo Sánchez 《European Journal of Sport Science》2017,17(10):1241-1251

The aim of this study was to analyse the effects of a combined strength-training programme (full-back squat, YoYo^TM leg curl, plyometrics and sled towing exercises) on performance in elite young soccer players and to examine the effects when this training programme was performed one or two days per week. Thirty-six male soccer players (U-17 to U-19) were recruited and assigned to experimental groups (EXP1: 1?s?w^?1; EXP2: 2?s?w^?1) or a control group (CON). Performance was assessed through a countermovement jump (CMJ) test (relative peak power [CMJ_PP] and CMJ height [CMJ_H]), a 20-m linear sprint test with split-times at 10-m, and a change of direction test (V-cut test) 1 week before starting the training programme and also 1 week after performing such training programme. Within-group analysis showed substantial improvements in CMJ variables (ES: 0.39–0.81) and COD (ES: 0.70 and 0.76) in EXP1 and EXP2, while EXP2 also showed substantial enhancements in all linear sprinting tests (ES: 0.43–0.52). Between-group analysis showed substantially greater improvements in CMJ variables (ES: 0.39–0.68) in experimental groups in comparison to CON. Furthermore, EXP2 achieved a substantial better performance in 20-m (ES: 0.48–0.64) than EXP1 and CON. Finally, EXP2 also showed greater enhancements in 10-m (ES: 0.50) and V-cut test (ES: 0.52) than EXP1. In conclusion, the combined strength-training programme improved jumping ability, independently of training frequency, though the achievement of two sessions per week also enhanced sprinting abilities (linear and COD) in young soccer players.  相似文献   

The functions of models     

Gallegos  Sergio A. 《Metascience》2017,26(1):103-106

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